Absorptive ND Filters, Optical Density: 0.2

Name: Absorptive ND Filters, Optical Density: 0.2
SKU: FNDF-0025

Cat No:FNDF-0025

Description

A Neutral Density (ND) Filter is an optical filter designed to reduce light intensity evenly across a broad wavelength range without significantly altering the spectral distribution or color balance of the transmitted light. By attenuating optical power in a controlled manner, ND filters help protect sensitive detectors, prevent signal saturation, and enable accurate optical measurements in high-intensity light environments.

Datasheet

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Basic Information

Feature	Uniform attenuation across a wide spectral range Available optical density (OD) values to meet different attenuation requirements Minimal spectral distortion for accurate measurements High optical quality with low scattering and absorption Suitable for continuous-wave and pulsed laser applications Customizable options for OD value, wavelength range, substrate material, and size
Optical Density	0.2
Transmission T (%)	63%
Diameter (mm)	12.50; 25.00; 50.00; 50.00x50.00
Material	Neutral grey glass
TWE	λ/4@633 nm
Parallelism	<1′
Surface Quality	60/40
Thickness (mm)	1.52
Working Wavelength Range	400~700 nm
OD Tolerance	±5% @633 nm
Clear Aperture	>90%
RoHS	Compliant
Optical Density (OD)	OD= -log(T/100) T=transmission
Dimension Tolerance (mm)	+0.0/-0.2
Thickness Tolerance (mm)	±0.5

Applications

Application

Optical measurement and calibration systems Laser power attenuation and beam control Imaging systems, cameras, and machine vision Spectroscopy and photonics experiments Scientific research and industrial optical setups

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