How to Specify an Optical Filter
To achieve a desired optical functionality for an application, it is critical that key use parameters are well defined when specifying the filter. Understanding the filter function and use conditions enables the filter design team to create a filter that both meets the functional requirements as well as the commercial constraints (cost, lead-time, volume) of the customer.
A post by Iridian Spectral Technologies highlights the important filter types and characteristics to define before manufacturing a filter. These characteristics include:
- Operational wavelength (required spectral information varies for different types of filters)
- Angle of incidence
- Polarization
- Surface finish/quality
- Surface shape and wavefront error
- Substrate and filter dimensions
- Clarity of aperture
- Orientation
An example filter specification is included at the end.
To read the post on Iridian’s website, click here.
To request more information or a quotation for Iridian products, contact IL Photonics.