Hollow Retroreflector, UVFS, Ø0.6 in Clear Aperture, Protected Gold Coating 800 nm - 20.0 μm, SM05 Threaded Mount — HR206-AU

Hollow Retroreflector — Model HR206-AU

UVFS hollow retroreflector, clear aperture Ø0.6 inches, operating wavelength 800 nm-20 μm, protected gold coating, beam deflection angle <20 arcsec, SM05 threaded mount.

Overview

LBTEK 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.

The LBTEK hollow retroreflector is coated with a protective gold film, offering high reflectivity in the infrared band (Ravg>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.

Key Features

• Operating Wavelength: 800 nm-20 μm
• Coating: AU: Ravg>96%@800 nm–20 μm [a]
• Beam deflection angle: <20 arcsec
• Clear Aperture: Ø0.6 inches
• Base material: UVFS
• Base thickness: 5 mm
• Surface Flatness (@633 nm): <2λ (single piece<λ/8)
• Surface finish (scratches/pitting): 60/40
• Thread size: SM05
• Operating Temperature: -20℃~85℃

Applications

• Precision optical metrology
• Laser technology
• Aerospace
• Infrared optical path retroreflection
• Infrared interferometric measurements