Product Description
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Bandpass Filters
(i)Narrow Bandpass Filters
(ii)Long Bandpass Filters
A bandpass filter has a transmission band surrounded by two blocking bands that allow only a portion of the spectrum to pass. The characteristics of the bandpass are controlled by multilayer dielectric coatings. Blocking is usually achieved with a combination of color filter glass and specially designed metallic films. The bandpass and blocking elements are laminated (epoxied) together to form a single unit and then edge sealed to prevent degradation due to moisture.
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Custom products
Our ability can be up to:
Material: Optical glass
Diameter: 2-300mm
Diameter Tolerance: -0.10mm
Minimal Thickness:0.5mm
Parallelism: 1-3 arc minutes
Flatness: λ/10@632.8nm
Surface Quality:20-10 scratch dig
Center Wavelength:Specified by customers
Blocking:Specified by customers
Clear Aperture: 90% of Diameter
Temperature limits: - 60°C to + 80°C