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Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-100C-2-B

NDFR-100C-2-B
$605.99
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Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted — Model NDFR-100C-2-B

Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted

Product Description

  • OD value can be adjusted by rotating the filter angle
  • Circular shape, OD value continuously adjustable
  • Anti-reflection coating: 650-1050 nm

LBTEK continuous neutral density filters are constructed with UV fused silica substrates, featuring a chrome-nickel-iron alloy coating (single-sided) applied to the surface within the 0~270° region. Within the coated area, the attenuation (OD) exhibits a linear relationship with the angle (θ), satisfying OD = k * θ. By rotating the coated region of the filter, linear and adjustable attenuation of the light beam can be achieved. Additionally, the backside of the filter is coated with an anti-reflection coating (AR coating), effectively suppressing stray light within the operating wavelength range of 650–1050 nm. Currently, the available OD ranges for continuous neutral density filters include 0.02–2.0, 0.02–4.0, and 0.02–6.0, with available diameters of Ø25 mm, Ø50 mm, and Ø100 mm. In addition to standard products, LBTEK also offers various customization services. For custom orders, please contact LBTEK technical support.

Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted

  • Not installed
  • Coating: Inconel & Anti-reflection coating
  • Size: Ø25 mm, Ø50 mm or Ø100 mm
  • OD range: 0.02-2.0, 0.02-4.0, 0.02-6.0

LBTEK uninstalled continuous neutral density filters feature a central hole diameter of 7.5 mm, facilitating mechanical mounting. The OD value of the continuous neutral density filter can be adjusted by rotation. One side of the continuous neutral density filter is coated with a filter film (Inconel film), while the other side is coated with an anti-reflection coating (B-coating). For optimal performance, it is recommended that light enters from the filter film side. Although it is a reflective neutral density filter, the Inconel film still absorbs a portion of the incident light. Additionally, this unprotected metal film should be handled with care to avoid contact; cleaning is recommended using an air blower.

Clear ApertureØ9.5 mm<<Ø97 mm
Design Wavelength650-1050 nm
Specification Sheet PDF — Download
CAD Drawing Download
3D Model (STL) STL — Download
Curve - NDFR-25C-×-B
Curve - NDFR-25C-×-B
Curve - NDFR-50C-×-B
Curve - NDFR-50C-×-B
Curve - NDFR-100C-×-B
Curve - NDFR-100C-×-B
Curve - Reflection VS Wavelength（AR Coating 650-1050 nm）
Curve - Reflection VS Wavelength（AR Coating 650-1050 nm）

Product Family: Continuous Neutral Density Filter, Operating Wavelength: 650 nm-1050 nm (19 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
Variable Neutral Density Filter Mount for Round Neutral Density Filters NDFR-PM NDFR-PM — — —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-100C-6-B NDFR-100C-6-B Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-100C-4-B NDFR-100C-4-B Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-100C-2-B Current NDFR-100C-2-B Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-50C-6-B NDFR-50C-6-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-50C-4-B NDFR-50C-4-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-50C-2-B NDFR-50C-2-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-25C-6-B NDFR-25C-6-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-25C-4-B NDFR-25C-4-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, unmounted NDFR-25C-2-B NDFR-25C-2-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-100C-6M-B NDFR-100C-6M-B Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-100C-4M-B NDFR-100C-4M-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-100C-2M-B NDFR-100C-2M-B Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-50C-6M-B NDFR-50C-6M-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-50C-4M-B NDFR-50C-4M-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-50C-2M-B NDFR-50C-2M-B Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-25C-6M-B NDFR-25C-6M-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-25C-4M-B NDFR-25C-4M-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 650-1050 nm, with mounting NDFR-25C-2M-B NDFR-25C-2M-B Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View