product
WaveQuanta

Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-6M-A

NDFR-100C-6M-A
$1,055.05
In Stock
Request Quote

Design Tools

Photonics Calculators Explore 49 free online calculators for photonics design Unit Converters Convert between wavelength, frequency, power, and more
View all 49 calculators →
RoHS REACH

Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. — Model NDFR-100C-6M-A

Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting.

Product Description

  • OD value can be adjusted by rotating the filter angle
  • Circular shape, OD value continuously adjustable
  • Anti-reflection coating: 350 nm-700 nm

LBTEK continuous neutral density filters are constructed from UV-grade fused silica substrates, with a chromium-nickel-iron alloy coating applied to one side over a 0~270° angular region. Within the coated area, the optical density (OD) varies linearly with the rotation angle (θ), following the relationship OD = k * θ. By rotating the coated region of the filter, linear and adjustable attenuation of the light beam can be achieved. Additionally, the back surface of the filter is coated with an anti-reflection (AR) coating, which effectively suppresses stray light within the 350-700 nm operating wavelength range. 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 optional diameters of Ø25 mm, Ø50 mm, and Ø100 mm. In addition to standard products, LBTEK offers various customization services. For custom orders, please contact LBTEK technical support.

Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting.

  • Installed in a mechanical housing with scale
  • Coating: Inconel & Anti-Reflection Coating
  • Dimensions: Ø25 mm, Ø50 mm, Ø100 mm
  • OD Range: 0.02-2.0, 0.02-4.0, 0.02-6.0

LBTEK's mechanical housing for installed continuous neutral density filters features angular scales and a rotation axis. The mount is precisely designed to minimize the impact on the optical element's clear aperture. The continuous neutral density filter is coated with a filtering film (Inconel film) on one side and an anti-reflection coating (A-coating) on the other. The side with the scale is the filtering film side, and for optimal performance, it is recommended to have light incident from this side. Although it is a reflective neutral density filter, the Inconel film still absorbs some of the incident light. Additionally, this unprotected metal film should be handled with care to avoid contact, and it is recommended to use an air blower for cleaning.

Clear ApertureØ9.5 mm<<Ø97 mm
Design Wavelength350-700 nm
Specification Sheet PDF — Download
CAD Drawing Download
3D Model (STL) STL — Download
Curve - NDFR-25C-×-A
Curve - NDFR-25C-×-A
Curve - NDFR-50C-×-A
Curve - NDFR-50C-×-A
Curve - NDFR-100C-×-A
Curve - NDFR-100C-×-A
Curve - Reflection VS Wavelength（AR Coating 350-700 nm）
Curve - Reflection VS Wavelength（AR Coating 350-700 nm）

Product Family: Continuous neutral density filter, operating wavelength: 350 nm-700 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: 350-700 nm, unmounted NDFR-100C-6-A NDFR-100C-6-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-100C-4-A NDFR-100C-4-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-100C-2-A NDFR-100C-2-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-6-A NDFR-50C-6-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-4-A NDFR-50C-4-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-50C-2-A NDFR-50C-2-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-6-A NDFR-25C-6-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-4-A NDFR-25C-4-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, unmounted NDFR-25C-2-A NDFR-25C-2-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-6M-A Current NDFR-100C-6M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-4M-A NDFR-100C-4M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-100C-2M-A NDFR-100C-2M-A Ø9.5 mm<<Ø97 mm Ø9.5 mm<<Ø97 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-6M-A NDFR-50C-6M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-4M-A NDFR-50C-4M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-50C-2M-A NDFR-50C-2M-A Ø9.5 mm<<Ø47 mm Ø9.5 mm<<Ø47 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-6M-A NDFR-25C-6M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-4M-A NDFR-25C-4M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View
Continuous neutral density filter, operating wavelength: 350-700 nm, with mounting. NDFR-25C-2M-A NDFR-25C-2M-A Ø9.5 mm<<Ø22 mm Ø9.5 mm<<Ø22 mm —View