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Colored Glass FilterOverview:Colored glass filters are high quality absorption filters made of colored glass. They allow certain wavelengths of light to pass unimpeded, while blocking other wavelength ranges to a designated extent. Rather than using thin film coatings to achieve filtering effects, ...

Interference Bandpass Filter Overview: Interference Bandpass Filters provide one of the simplest ways to transmit a well-defined wavelength band of light, while rejecting other unwanted radiation. They are ideal for life science instrumentation and also are used in imaging or machine vision ...

Absorptive Neutral Density (ND) Filter Overview: Absorptive Neutral Density (ND) filters is a type of dark filters that easily attaches to the front of a camera lens, to control how much light enters the camera’s sensor. Since a neutral density filter only affects light levels, it doesn’t have any ...

Reflective Neutral Density (ND) Filter Overview: Reflective Neutral Density (ND) Filters provide uniform attenuation over the broad spectral range from 400 to 1100 nm. Reflective ND filters consist of an N-BK7 glass or UV fused silica substrate with a metal (Inconel) coating deposited on one side. ...

Lyot Filter, Birefringent Filter, Birefringent Tuners Overview: A Lyot Filter (Birefringent Filter), named for its inventor Bernard Lyot, is a type of optical filter that uses birefringence to produce a narrow passband of transmitted wavelengths. Lyot filters are often used in astronomy, particularl...

Common Types of Optical Filters for Optical Modules: Bandpass Filters (BPF) – Allow a specific wavelength band to pass while blocking others. Used in DWDM/CWDM systems. Edge Filters (Longpass/Shortpass) – Transmit wavelengths above (longpass) or below (shortpass) a cutoff. Used for pump/signal ...