Optical Glass Filters

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, these filters rely on the absorption and transmission properties of the color glass. Precision can be achieved through careful control of the thickness of the material as well as of

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, particularly for solar astronomy. Lyot filters (Birefringent tuners) for wavelength tuning of lasers are made of crystal quartz (Transmission ranges: 200 nm-2700 nm) or MgF2 (Transmission

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 separation in EDFAs. Notch Filters (Bandstop) – Block a narrow band of wavelengths. Used for laser protection or ASE suppression. Gain Flattening Filters (GFF) – Equalize gain across

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 impact on image colour, contrast or sharpness. Essentially, it’s like a volume control for light. By reducing the amount of light that comes through your camera lens, a neutral

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. Inconel is a metallic alloy that ensures flat spectral response from the UV to the near IR. To prolong the lifetime of reflective ND filters, we recommend using non-contact cleaning

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 applications. Each filter is housed in a black anodized aluminum ring which makes handling easier and enhances the blocking OD by limiting scattering. General Specifications Of Interferenc