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Bandpass filters are allow special wavelength for transmission and block all other wavelength light.
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ChinaOptical Coated Bandpass Filters
Optical coated bandpass filters are optical components designed to selectively transmit light within a specific wavelength range while blocking unwanted wavelengths.
2.Working Principle:
(1)Utilizes multilayer dielectric coatings deposited on substrates to achieve high transmission (>90%) in the target band and strong blocking (OD4+) of out-of-band light (e.g., UV, visible, or IR).
(2)Typical structure: Combines shortpass (SP) and longpass (LP) filters to create a defined passband.
3. Scope of Use:
Product parameters | |||||
Materials | Optical glass, UVFS, Si, etc | ||||
Size | 1-200mm | ||||
Surface type | 2λ to λ/10 @632.8nm | ||||
Effective clear aperture | 90% | ||||
Finish | 80/50 to 40/20 S/D | ||||
Optical density | OD1 to OD6 | ||||
Coating | Upon Request |
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