Custom optical filters

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.

Custom filters pecifications
Diameter tolerance0/0.015mm, 0/0.01mm, 0/0.02mm
Thickness tolerance?0.01mm, ?0.03mm
Irregularity(PV)ΔN=0.5, ΔN=1, ΔN=2
Surface quality10-5, 20-10, 60-40
Filter coating capabilities
SubstratesAll glass types
Spectral ranges300-3000nm
DurabilityMIL-STD-810F, Section 507.4; MIL-C-48497A,Section 3.4.1