{"title":"Hollow Retroreflector","description":"\u003cp\u003eBrowse 9+ retroreflectors from WaveQuanta's catalog. Part of our precision optical components and lenses range. Detailed specifications, datasheets, and 3D models available for each product. Request a quote today.\u003c\/p\u003e","products":[{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-6-in-clear-aperture-protected-silver-coating-450-nm-20-0-μm-sm05-threaded-mount-hr206-ag","title":"Hollow Retroreflector, UVFS, Ø0.6 in Clear Aperture, Protected Silver Coating 450 nm - 20.0 μm, SM05 Threaded Mount — HR206-AG","description":"\u003ch2\u003eHollow Retroreflector — Model HR206-AG\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.60 inches, operating wavelength 450 nm-20 μm, protected silver coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protected silver film, offering high reflectivity in the visible to infrared range (Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm), making it suitable for beam retroreflection and interferometry in the visible to infrared spectrum. This series is available in three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to accommodate various beam diameters and system space requirements. Among them, the half-inch and 1-inch versions are paired with an SM05 threaded mount, while the 2-inch version is paired with an SM1 threaded mount, allowing direct adaptation to internally threaded optical mounts of the same specification. This series of hollow retroreflectors uses a mirror assembly process. When the beam directly hits the mirror assembly junction, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 450 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AG: Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.60 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eBeam retroreflection in the visible to infrared spectrum\u003c\/li\u003e\n\u003cli\u003eInterferometry in the visible to infrared spectrum\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965454659738,"sku":"HR206-AG","price":717.74,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr206-ag-product.jpg?v=1793864960"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-9-in-clear-aperture-protected-silver-coating-450-nm-20-0-μm-sm05-threaded-mount-hr209-ag","title":"Hollow Retroreflector, UVFS, Ø0.9 in Clear Aperture, Protected Silver Coating 450 nm - 20.0 μm, SM05 Threaded Mount — HR209-AG","description":"\u003ch2\u003eHollow Retroreflector — Model HR209-AG\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.9 inches, operating wavelength 450 nm-20 μm, protected silver coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protected silver film, offering high reflectivity in the visible to infrared range (Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm), making it suitable for beam retroreflection and interferometry in the visible to infrared spectrum. This series is available in three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to accommodate various beam diameters and system space requirements. Among them, the half-inch and 1-inch versions are paired with an SM05 threaded mount, while the 2-inch version is paired with an SM1 threaded mount, allowing direct adaptation to internally threaded optical mounts of the same specification. This series of hollow retroreflectors uses a mirror assembly process. When the beam directly hits the mirror assembly junction, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 450 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AG: Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.9 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eBeam retroreflection in the visible to infrared spectrum\u003c\/li\u003e\n\u003cli\u003eInterferometry in the visible to infrared spectrum\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965454758042,"sku":"HR209-AG","price":766.5,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr209-ag-product.jpg?v=1793865236"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o1-8-in-clear-aperture-protected-silver-coating-450-nm-20-0-μm-sm1-threaded-mount-hr218-ag","title":"Hollow Retroreflector, UVFS, Ø1.8 in Clear Aperture, Protected Silver Coating 450 nm - 20.0 μm, SM1 Threaded Mount — HR218-AG","description":"\u003ch2\u003eHollow Retroreflector — Model HR218-AG\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø1.8 inch, operating wavelength 450 nm-20 μm, protected silver coating, beam deflection angle \u0026lt;20 arcsec, SM1 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protected silver film, offering high reflectivity in the visible to infrared range (Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm), making it suitable for beam retroreflection and interferometry in the visible to infrared spectrum. This series is available in three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to accommodate various beam diameters and system space requirements. Among them, the half-inch and 1-inch versions are paired with an SM05 threaded mount, while the 2-inch version is paired with an SM1 threaded mount, allowing direct adaptation to internally threaded optical mounts of the same specification. This series of hollow retroreflectors uses a mirror assembly process. When the beam directly hits the mirror assembly junction, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 450 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AG: Ravg\u0026gt;96%@450 nm-2 μm, Ravg\u0026gt;97.5%@2 μm-20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø1.8 inch\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM1\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eBeam retroreflection in the visible to infrared spectrum\u003c\/li\u003e\n\u003cli\u003eInterferometry in the visible to infrared spectrum\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965454856346,"sku":"HR218-AG","price":1099.45,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr218-ag-product.jpg?v=1793865336"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-6-in-clear-aperture-protected-gold-coating-800-nm-20-0-μm-sm05-threaded-mount-hr206-au","title":"Hollow Retroreflector, UVFS, Ø0.6 in Clear Aperture, Protected Gold Coating 800 nm - 20.0 μm, SM05 Threaded Mount — HR206-AU","description":"\u003ch2\u003eHollow Retroreflector — Model HR206-AU\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.6 inches, operating wavelength 800 nm-20 μm, protected gold coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protective gold film, offering high reflectivity in the infrared band (Ravg\u0026gt;96%@800 nm-20 μm), making it suitable for infrared optical path retroreflection and interferometric measurements. This series provides three standard sizes: 1\/2 inch, 1 inch, and 2 inches, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to meet different beam diameters and system space requirements. The 1\/2-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, allowing direct compatibility with optical mounts of the same thread specification. This series of hollow retroreflectors uses a mirror splicing technique. When the beam directly hits the splicing joints, scattering or light leakage may occur. Please take proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 800 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AU: Ravg\u0026gt;96%@800 nm–20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.6 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eInfrared optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eInfrared interferometric measurements\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965454954650,"sku":"HR206-AU","price":717.74,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr206-au-product.jpg?v=1793865400"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-9-in-clear-aperture-protected-gold-coating-800-nm-20-0-μm-sm05-threaded-mount-hr209-au","title":"Hollow Retroreflector, UVFS, Ø0.9 in Clear Aperture, Protected Gold Coating 800 nm - 20.0 μm, SM05 Threaded Mount — HR209-AU","description":"\u003ch2\u003eHollow Retroreflector — Model HR209-AU\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.9 inches, operating wavelength 800 nm-20 μm, protected gold coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protective gold film, offering high reflectivity in the infrared band (Ravg\u0026gt;96%@800 nm-20 μm), making it suitable for infrared optical path retroreflection and interferometric measurements. This series provides three standard sizes: 1\/2 inch, 1 inch, and 2 inches, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to meet different beam diameters and system space requirements. The 1\/2-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, allowing direct compatibility with optical mounts of the same thread specification. This series of hollow retroreflectors uses a mirror splicing technique. When the beam directly hits the splicing joints, scattering or light leakage may occur. Please take proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 800 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AU: Ravg\u0026gt;96%@800 nm–20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.9 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eInfrared optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eInfrared interferometric measurements\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965455020186,"sku":"HR209-AU","price":766.5,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr209-au-product.jpg?v=1793865485"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o1-8-in-clear-aperture-protected-gold-coating-800-nm-20-0-μm-sm1-threaded-mount-hr218-au","title":"Hollow Retroreflector, UVFS, Ø1.8 in Clear Aperture, Protected Gold Coating 800 nm - 20.0 μm, SM1 Threaded Mount — HR218-AU","description":"\u003ch2\u003eHollow Retroreflector — Model HR218-AU\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø1.8 inch, operating wavelength 800 nm-20 μm, protected gold coating, beam deflection angle \u0026lt;20 arcsec, SM1 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eThe LBTEK hollow retroreflector is coated with a protective gold film, offering high reflectivity in the infrared band (Ravg\u0026gt;96%@800 nm-20 μm), making it suitable for infrared optical path retroreflection and interferometric measurements. This series provides three standard sizes: 1\/2 inch, 1 inch, and 2 inches, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches, respectively, to meet different beam diameters and system space requirements. The 1\/2-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, allowing direct compatibility with optical mounts of the same thread specification. This series of hollow retroreflectors uses a mirror splicing technique. When the beam directly hits the splicing joints, scattering or light leakage may occur. Please take proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 800 nm-20 μm\u003c\/li\u003e\n\u003cli\u003eCoating: AU: Ravg\u0026gt;96%@800 nm–20 μm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø1.8 inch\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM1\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eInfrared optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eInfrared interferometric measurements\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965455118490,"sku":"HR218-AU","price":1099.45,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr218-au-product.jpg?v=1793865564"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-6-in-clear-aperture-protected-uv-enhanced-aluminum-coating-250-nm-600-nm-sm05-threaded-mount-hr206-uval","title":"Hollow Retroreflector, UVFS, Ø0.6 in Clear Aperture, Protected UV-Enhanced Aluminum Coating 250 nm - 600 nm, SM05 Threaded Mount — HR206-UVAL","description":"\u003ch2\u003eHollow Retroreflector — Model HR206-UVAL\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.6 inches, operating wavelength 250 nm-600 nm, protected UV-enhanced aluminum coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eLBTEK hollow retroreflectors are coated with a protective UV-enhanced aluminum film, offering high reflectivity in the ultraviolet band (Ravg\u0026gt;90%@250 nm-600 nm), making them suitable for UV optical path retroreflection and interferometry. This series provides three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches respectively, meeting the assembly requirements of different beam diameters and system spaces. Among them, the half-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, enabling direct compatibility with standard optical mounting accessories such as internally threaded optical mounts and coaxial mounting plates of the same specifications. This series of hollow retroreflectors adopts a mirror splicing process. When the beam directly hits the splicing area, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 250 nm-600 nm\u003c\/li\u003e\n\u003cli\u003eCoating: UVAL: Ravg\u0026gt;90%@250 nm-600 nm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.6 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eUV optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eUV interferometry\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965455216794,"sku":"HR206-UVAL","price":717.74,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr206-uval-product.jpg?v=1793865659"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o0-9-in-clear-aperture-protected-uv-enhanced-aluminum-coating-250-nm-600-nm-sm05-threaded-mount-hr209-uval","title":"Hollow Retroreflector, UVFS, Ø0.9 in Clear Aperture, Protected UV-Enhanced Aluminum Coating 250 nm - 600 nm, SM05 Threaded Mount — HR209-UVAL","description":"\u003ch2\u003eHollow Retroreflector — Model HR209-UVAL\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø0.9 inches, operating wavelength 250 nm-600 nm, protected UV-enhanced aluminum coating, beam deflection angle \u0026lt;20 arcsec, SM05 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eLBTEK hollow retroreflectors are coated with a protective UV-enhanced aluminum film, offering high reflectivity in the ultraviolet band (Ravg\u0026gt;90%@250 nm-600 nm), making them suitable for UV optical path retroreflection and interferometry. This series provides three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches respectively, meeting the assembly requirements of different beam diameters and system spaces. Among them, the half-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, enabling direct compatibility with standard optical mounting accessories such as internally threaded optical mounts and coaxial mounting plates of the same specifications. This series of hollow retroreflectors adopts a mirror splicing process. When the beam directly hits the splicing area, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 250 nm-600 nm\u003c\/li\u003e\n\u003cli\u003eCoating: UVAL: Ravg\u0026gt;90%@250 nm-600 nm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø0.9 inches\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM05\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eUV optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eUV interferometry\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965455315098,"sku":"HR209-UVAL","price":766.5,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr209-uval-product.jpg?v=1793869139"},{"product_id":"lbtek-hollow-retroreflector-uvfs-o1-8-in-clear-aperture-protected-uv-enhanced-aluminum-coating-250-nm-600-nm-sm1-threaded-mount-hr218-uval","title":"Hollow Retroreflector, UVFS, Ø1.8 in Clear Aperture, Protected UV-Enhanced Aluminum Coating 250 nm - 600 nm, SM1 Threaded Mount — HR218-UVAL","description":"\u003ch2\u003eHollow Retroreflector — Model HR218-UVAL\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eUVFS hollow retroreflector, clear aperture Ø1.8 inch, operating wavelength 250 nm-600 nm, protected UV-enhanced aluminum coating, beam deflection angle \u0026lt;20 arcsec, SM1 threaded mount.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eLBTEK Hollow Retroreflector (Corner Cube Reflector) consists of three mutually perpendicular mirrors, which can reflect an incident beam back parallel to the incident direction (returning along the original path when aligned with the center of the hollow retroreflector), achieving stable retroreflection without precise alignment. This series of products uses fused silica as the substrate, featuring high retroreflection accuracy, excellent surface figure precision, and good thermal stability. Equipped with a protective metal coating, it is suitable for broadband retroreflection and interferometric measurements in the ultraviolet, visible, and infrared ranges. In addition to standard products, LBTEK also offers customization services for retroreflection accuracy, special wavelength coatings, dimensions, or mounting interfaces. The hollow design allows the optical path to travel in air, effectively avoiding material absorption, refractive-index deviation, and chromatic aberration inherent in solid glass prisms.\u003c\/p\u003e\n\u003cp\u003eLBTEK hollow retroreflectors are coated with a protective UV-enhanced aluminum film, offering high reflectivity in the ultraviolet band (Ravg\u0026gt;90%@250 nm-600 nm), making them suitable for UV optical path retroreflection and interferometry. This series provides three standard sizes: half-inch, 1-inch, and 2-inch, with corresponding effective clear apertures of Ø0.60 inches, Ø0.90 inches, and Ø1.80 inches respectively, meeting the assembly requirements of different beam diameters and system spaces. Among them, the half-inch and 1-inch versions are paired with SM05 threaded mounts, while the 2-inch version uses an SM1 threaded mount, enabling direct compatibility with standard optical mounting accessories such as internally threaded optical mounts and coaxial mounting plates of the same specifications. This series of hollow retroreflectors adopts a mirror splicing process. When the beam directly hits the splicing area, scattering or light leakage may occur. Please ensure proper laser protection during use.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Wavelength: 250 nm-600 nm\u003c\/li\u003e\n\u003cli\u003eCoating: UVAL: Ravg\u0026gt;90%@250 nm-600 nm [a]\u003c\/li\u003e\n\u003cli\u003eBeam deflection angle: \u0026lt;20 arcsec\u003c\/li\u003e\n\u003cli\u003eClear Aperture: Ø1.8 inch\u003c\/li\u003e\n\u003cli\u003eBase material: UVFS\u003c\/li\u003e\n\u003cli\u003eBase thickness: 5 mm\u003c\/li\u003e\n\u003cli\u003eSurface Flatness (@633 nm): \u0026lt;2λ (single piece\u0026lt;λ\/8)\u003c\/li\u003e\n\u003cli\u003eSurface finish (scratches\/pitting): 60\/40\u003c\/li\u003e\n\u003cli\u003eThread size: SM1\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -20℃~85℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision optical metrology\u003c\/li\u003e\n\u003cli\u003eLaser technology\u003c\/li\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eUV optical path retroreflection\u003c\/li\u003e\n\u003cli\u003eUV interferometry\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LBTek","offers":[{"title":"Default Title","offer_id":48965455380634,"sku":"HR218-UVAL","price":1099.45,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/hollow-retroreflector-hr218-uval-product.jpg?v=1793869205"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/hollow-retroreflector-collection_c3a39bbc-8032-4f16-9849-fa5f433dc3c7.jpg?v=1793871041","url":"https:\/\/waveqvanta.com\/collections\/lbtek-optics-l4-hollow-retroreflectors.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}