What is an Edgepass filter?

What is an Edgepass Filter?

An Edgepass Filter is a type of optical filter designed to either transmit or block wavelengths in a spectrum based on a specified cut-on or cut-off point. These filters are categorized into two main types: Longpass and Shortpass filters.

Types of Edgepass Filters

  • Longpass Filters: Transmit wavelengths longer than the cut-on wavelength, blocking shorter wavelengths.
  • Shortpass Filters: Transmit wavelengths shorter than the cut-off wavelength, blocking longer wavelengths.


Edgepass filters are used in various applications, including:

  • Photography and imaging
  • Spectroscopy
  • Optical instrumentation
  • Laser systems

Key Features

Feature Description
High Transmission Efficiently transmits desired wavelengths.
Sharp Transition Clear distinction between blocked and transmitted wavelengths.
Durable Coating Resistant to physical and environmental damage.

Edgepass filters are essential components in optical systems, providing precise control over the wavelengths that pass through, enhancing the performance and functionality of various devices.

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