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| NDL-25C-4 - Continuously Variable ND Filter, 25 x 100 mm, OD: 0.04 - 4.0 |
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| Product Summary: |
Features
- Rectangular, Continuously-Variable, Reflective (Metallic) Neutral Density (ND) Filter
- Ideal for Building a Variable Attenuator
This Thorlabs' Rectangular Continuously Variable, Reflective (Metallic) ND Filter is ideal for mounting on a transition stage for use as a variable attenuator. This filter is made from a UV Fused Silica glass substrate and has a mental (Inconel) coated. The Inconel film is a very hard metallic alloy that is resistant to aging under normal conditions. The Inconel coating will oxidize at elevated temperatures; it is recommended that the Neutral Density filter be used at temperatures below 100° C. The use of an Inconel coating ensures that the spectral response of this ND filter is very flat from the UV out to the Mid-IR.
Specifications
- Substrate: UV Fused Silica
- Length Tolerance (A & B): +0.00/-0.25 mm
- Coating Tolerance (C & D): ±0.25 mm
- Coating: Front ND, Back Uncoated
- Spectral Range: 240-1200 nm
- Flatness: 1? per 25 mm
- Surface Quality: 60-40 Scratch-Dig
- Wedge: <3 arcmin
- Chamfer: 0.2 mm x 0.2 mm
- Optical Density Range: 0.04 - 4.0
- A: 100 mm
- B: 25 mm
- C: 10 mm
- D: 2 mm
- E: 2 mm
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