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WaveQuanta

Reflective Neutral Density Filter, Square, Unmounted NDFRS20-04

NDFRS20-04
$90.92
In Stock
Key Specifications
Wavelength 350.0nm
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Reflective Neutral Density Filter, Square, Unmounted — Model NDFRS20-04

Operating wavelength 350 nm-1100 nm.

Product Description

  • Substrate Material: N-BK7
  • Working Wavelength: 350 nm-1100 nm
  • OD: 0.2, 0.3, 0.4, 0.5, 1.0, 2.0, 3.0, 4.0
  • Low Power Applications
  • Reflective Neutral Density Filters

LBTEK Reflective Neutral Density (ND) Filters are made of N-BK7 substrate with chrome-nickel-iron alloy coating, available in optical density (OD) ranges from 0.2 to 4.0. The sizes include Ø12.7 mm, Ø25.4 mm, and 50.8 mm×50.8 mm. LBTEK filters can be mounted on threaded tubes or coaxial mounting plates for use in coaxial systems, or installed in free space. LBTEK also offers customization services for other special sizes and optical density value attenuators. Please contact Technical Support for any requirements.

Reflective Neutral Density Filter, Square, Unmounted

  • Substrate Material: N-BK7
  • Working Wavelength: 350 nm-1100 nm
  • Low Power Applications
  • Reflective Neutral Density Filter

LBTEK unmounted square reflective neutral density filters have an optical density (OD) range of 0.2-4.0 and dimensions of 50.8 mm × 50.8 mm. By depositing chrome Inconel alloy (single-sided) on N-BK7 substrates, a smooth OD curve is achieved across the 350 nm-1100 nm wavelength range. Although classified as reflective neutral density filters, the chrome Inconel coating still absorbs some incident light. For optimal performance, it is recommended that incident light enters from the chrome Inconel-coated side. Additionally, be careful to avoid contact with this unprotected metal film, as contact may scratch the unprotected surface. It is recommended to use an air blower for cleaning.

Clear Aperture>45 mm×45 mm
Operating Wavelength350 nm-1100 nm
Thickness2 mm
Substrate Material50.8 mm×50.8 mm
Specification Sheet PDF — Download
CAD Drawing Download
3D Model (STL) STL — Download
Curve - N-BK7 Reflective Neutral Density Filters
Curve - N-BK7 Reflective Neutral Density Filters
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Product Family: Reflective Neutral Density (ND) Filters, Working Wavelength: 350 nm-1100 nm (40 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-40 NDFRS20-40 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-30 NDFRS20-30 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-20 NDFRS20-20 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-10 NDFRS20-10 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-05 NDFRS20-05 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-04 Current NDFRS20-04 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-03 NDFRS20-03 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Square, Unmounted NDFRS20-02 NDFRS20-02 >45 mm×45 mm >45 mm×45 mm 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-02 NDFR10-02 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-03 NDFR10-03 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-04 NDFR10-04 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-05 NDFR10-05 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-10 NDFR10-10 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-20 NDFR10-20 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-30 NDFR10-30 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR10-40 NDFR10-40 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-02 NDFR05-02 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-03 NDFR05-03 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-04 NDFR05-04 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-05 NDFR05-05 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-10 NDFR05-10 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-20 NDFR05-20 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-30 NDFR05-30 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Unmounted NDFR05-40 NDFR05-40 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-03 MNDFR10-03 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-02 MNDFR10-02 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-04 MNDFR10-04 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-05 MNDFR10-05 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-10 MNDFR10-10 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-20 MNDFR10-20 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-30 MNDFR10-30 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR10-40 MNDFR10-40 Ø25.4 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-02 MNDFR05-02 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-03 MNDFR05-03 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-04 MNDFR05-04 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-05 MNDFR05-05 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-10 MNDFR05-10 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-20 MNDFR05-20 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-30 MNDFR05-30 Ø12.7 mm >90% 350 nm-1100 nm View
Reflective Neutral Density Filter, Round, Mounted MNDFR05-40 MNDFR05-40 Ø12.7 mm >90% 350 nm-1100 nm View