custom optical filters

optical filters
optical filter

Filters are made by adding a special dye to a plastic or glass substrate or by vaporizing an optical film on its surface to attenuate (absorb) some bands of light waves or to explicitly select a small range of bands through which light waves pass, while reflecting (or absorbing) other unwanted bands.By changing the structure of the filter and the optical parameters of the film, various spectral characteristics can be obtained, so that the filter can control, adjust and change the transmission, reflection, polarization or phase state of the light wave.

Custom Range

DG optical filters are mainly used in below application field:

Environmental testing, medical equipment, stage lighting, fluorescence analyzer, enzyme standard instrument, cable to upgrade equipment, wireless transmission equipment, cell phone barcode scanning, infrared electronic whiteboard, the infrared camera, infrared touchscreen, iris recognition, infrared medical instruments, infrared ink identification, red membrane recognition, face recognition sensor system. Hand-held infrared laser rangefinder, laser rangefinder, optical instrument, detection instrument.


Diameter 10-180mm
Diameter tolerance 0/0.015mm, 0/0.01mm, 0/0.02mm
Thickness tolerance ±0.01mm, ±0.03mm
Irregularity(PV) ΔN=0.5, ΔN=1, ΔN=2
Surface quality 10-5, 20-10, 60-40

Filter coating capabilities

Substrates All glass types
Spectral ranges 300-3000nm
Bandwidth 1nm-broadband
Transmission 2%-98%
Durability MIL-STD-810F, Section 507.4; MIL-C-48497A,Section 3.4.1