How to Clean Optical Filters
How to Clean Optical Filters?While the Iridian filters are hard coated filters, the filters are delicate and should be handled with care to avoid or minimize direct contact with any other optics. All Iridian filters may be cleaned using the following recommended method.
How to Specify Surface Figure and Wavefront Distortion for Multi-layer Optical Filters
Optical filters are used in many applications and the surface figure and wavefront distortion requirements of filters are dependent on where and how they are used. Whereas band-pass or clean-up functionality may only require control of the transmitted wavefront, dichroic beam-steering/splitting filters or wavelength selective mirrors likely require specification of both the transmitted and reflected beams. If filters are only used in sensing applications with very tolerant detector geometries, there may be no need, in practice, to put any constraints on the surface figure or wavefront distortion. It is important to understand where, when, how, and how much to specify wavefront distortion to ensure that functional requirements are guaranteed while unnecessary and costly constraints are avoided.
Frequently Asked Questions
What are optical thin film filters? How are optical thin film filters manufactured? Click here for frequently asked questions and answers.
Gain Flattening Filter (GFF) Tutorial
Gain Flattening Filter (GFFs), also known as gain equalizing filters, are used to flatten or smooth out unequal signal intensities over…
Single Cavity Filter Tutorial
The Single Cavity Filter (SCF) is used to select a single frequency from a broad spectral range. SCFs are typically used for…
Etalon Tutorial
A Solid Etalon Filter (SEF) is used to select a periodically spaced frequency grid from a broad spectral range. The key specifications
Linear Transmittance Filter Tutorial
Linear Transmittance Filter (LTF) has a transmittance that is changing linearly over a specified wavelength range. LTFs are typically used for…
Tap Coupler – Beamsplitter Tutorial
Tap couplers filters and beamsplitters are used to reflect a specific percentage of incident light over a broad wavelength range and for a specified angle of incidence. Beamsplitters and tap couplers can be specified…
Iridian Announces New Optical Filters Designed for PCR Testing
Ottawa, Canada, Dec.14, 2020 In an effort to support the rapidly growing use of polymerase chain reaction (PCR) in rapid diagnosis of diseases such as COVID-19, Iridian Spectral Technologies has introduced a line of ultra performance optical filters specifically...
