Neutral Density Filters

PRODUCT CATEGORIES

INOUIRY

Visible Light Metal Film Neutral Density Filter (VIS-NIR)

Metal film neutral density filter (VIS-NIR) is made of fine annealed H-K9L optical glass and is precision machined and polished. The surface optical quality and parallelism are both at a very high level. Due to the characteristics of the substrate, this type of filter has a flat spectral response from visible to near infrared.

Visible light metal film neutral density filter is a reflective neutral density filter. It uses the principle of thin film interference to transmit part of the light and reflect the other part of the light. Metal film coating: broadband use, uniform wavelength attenuation, low power consumption. It can be widely used in spectral measurement, imaging optical systems, machine vision systems, and light output attenuation of low-power lasers.

Inventory Parameters

Optical Density (OD)	Transmittance T(%)	Wavelength Range (nm)	Thickness (mm)	Diameter (mm)
0.1	79%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.2	63%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.3	50%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.4	40%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.5	32%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.6	25%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
0.7	20%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
1	10%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
1.3	5%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
2	1%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
3	0.10%	400-1100	2+-0.2	12.7/ 25.4/ 50*50
4	0.01%	400-1100	2+-0.2	12.7/ 25.4/ 50*50

Absorption Type Neutral Density Filter

Absorption type neutral density filter, using neutral gray glass after precision processing and polishing, the surface optical quality and parallelism have reached a high level. Different from the reflective filter, the absorption type density film uses substrate materials with different parameters, and achieves different light attenuation indicators by controlling the thickness.

Absorption type neutral density filter generally refers to the material itself or after the material is doped with certain elements, it absorbs some specific wavelengths of light, and has no or little effect on other wavelengths of light. Usually the damage threshold of the absorption type neutral density filter is lower, and after long-term use, it may have heating phenomenon, so be careful when using it. Metallized film: broadband use, uniform wavelength attenuation, low power consumption.

Inventory Parameters

Optical Density (OD)	Transmittance T(%)	Wavelength Range (nm)	Thickness (mm)	Diameter (mm)
0.1	79%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.15	70%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.2	63%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.3	50%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.4	40%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.5	32%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.6	25%	400-700	2+-0.2	12.7/ 25.4/ 50*50
0.7	20%	400-700	2+-0.2	12.7/ 25.4/ 50*50
1	10%	400-700	2+-0.2	12.7/ 25.4/ 50*50
1.3	5%	400-700	2+-0.2	12.7/ 25.4/ 50*50
2	1%	400-700	2+-0.2	12.7/ 25.4/ 50*50
3	0.10%	400-700	2+-0.2	12.7/ 25.4/ 50*50
4	0.01%	400-700	2+-0.2	12.7/ 25.4/ 50*50

UV Metal Film Neutral Density Filter (UV-NIR)

Metal film neutral density filter (UV-NIR) uses UV fused quartz substrate, and the surface optical quality and parallelism are of high level. The wide spectrum characteristics of this type of filter of our company provide flat spectral response for applications from UV to short-wave infrared.

Visible light metal film neutral density filter is a reflective neutral density filter, which uses the principle of thin film interference to transmit part of the light and reflect the other part of the light. Metal film coating: broadband use, uniform wavelength attenuation, low power consumption. It can be widely used in spectral measurement, imaging optical system, machine vision system and light output attenuation of low-power lasers.

Inventory Parameters

Optical Density (OD)	Transmittance T(%)	Wavelength Range (nm)	Thickness (mm)	Diameter (mm)
0.1	79%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.2	63%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.3	50%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.4	40%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.5	32%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.6	25%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
0.7	20%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
1	10%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
1.3	5%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
2	1%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
3	0.10%	200-1200	2+-0.2	12.7/ 25.4/ 50*50
4	0.01%	200-1200	2+-0.2	12.7/ 25.4/ 50*50