Fixed neutral density filter

NegotiableUpdate on 02/26

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Nature of the Manufacturer: Producers

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Overview

Neutral density filter (referred to as density sheet) is a filter that attenuates light intensity without changing the energy distribution of the spectrum

Product Details

A neutral density filter (referred to as a density filter) is a filter that attenuates light intensity without altering the energy distribution of the spectrum. Fixed neutral density filters can uniformly attenuate light intensity in a wide spectral range, and are coated with durable metal film layers on the surface. These filters can be applied in fields such as natural light and laser. Fixed density filters are divided into absorption and reflection type density sheets and low reflection type density sheets (ND mirrors), which exhibit neutral attenuation of light over a wide spectral range. They are also particularly suitable for calibration of optical systems. Special size, density, and wavelength density sheets can be customized.

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substrate	BK7 、 fused silica
Tolerance	±0.1mm
Optical aperture	90% of the total area
parallelism	3’
SURFACE QUALITY	80-50
Standard deviation of optical density	±5%
Calibration wavelength	550nm
design wavelength	380nm-2000nm (BK7) 250nm-2500nm (fused silica)

Standard product:

Part No	Size (mm)	optical density	transmissivity	substrate
FXND10-B12	Φ12.7	1.0	10.0 %	BK7
FXND20-B12	Φ12.7	2.0	1%	BK7
FXND30-B12	Φ12.7	3.0	0.1%	BK7
FXND40-B12	Φ12.7	4.0	0.01%	BK7
FXND10-B60	Φ60	1.0	10.0 %	BK7
FXND20-B60	Φ60	2.0	1%	BK7
FXND30-B60	Φ60	3.0	0.1%	BK7
FXND40-B60	Φ60	4.0	0.01%	BK7
FXND10-B50S	50 * 50	1.0	10.0 %	BK7
FXND10-B50S	50 * 50	2.0	1%	BK7

Standard density sheet group:

Part No	size	series	substrate
FXNDF-B12A	Φ12.7	A	BK7
FXNDF-B12B	Φ12.7	B	BK7
FXNDF-B25A	Φ25.4	A	BK7
FXNDF-B25B	Φ25.4	B	BK7
FXNDF-B60A	Φ60	A	BK7
FXNDF-B60B	Φ60	B	BK7
FXNDF-B50A S	50 * 50	A	BK7
FXNDF-B50B S	50 * 50	B	BK7

Series type:

optical density
A	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9
	transmissivity
B	15%	20%	25%	30%	40%	50%	60%	70%	80%

Other dimensions, optical density, wavelength of use, and other parameters can be customized according to customer needs. Welcome to contact us.

Mainly used in fields that require uniform attenuation of light intensity within a wide spectral range. This product is suitable for both ordinary light sources and laser light sources.