Optical Filter Basics: Longpass and Shortpass Filters
There are a variety of optical filter types available for use in optical systems. Two types are longpass and shortpass filters:
- Longpass (LP): Longpass filters transmit wavelengths longer than the cut-on wavelength and block shorter wavelengths.
- Shortpass (SP): Shortpass filters transmit wavelengths shorter than their cut-off point, blocking longer wavelengths (opposite of longpass filters).
Both longpass and shortpass filters play an important role in light control for various optical applications. They are fundamental tools for manipulating light in a controlled manner.
To learn more about the world of optical filters, download Chroma Technology’s comprehensive Handbook of Optical Filters for Fluorescence Microscopy for more detailed information including a comprehensive glossary!
About Chroma Technology
Chroma Technology is a leading manufacturer and OEM supplier of high performance optical filters used in a wide range of applications, including health care, biomedical research, remote sensing, machine vision, and aerospace. Chroma offers an extensive selection of optical filter sets and filter accessories, as well as custom solutions tailored to customer-specific needs.
For more information or a quotation for this or other Chroma products, contact IL Photonics.

