filter

Custom Colored Long Pass Filter

  • Material: colored glass
  • Parallel difference: <1mm
  • Surface finish: 60/40
  • Thickness: 2mm ± 0.2mm
  • Diameter error: +0.0/-0.2mm
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What is a colored long pass filter?

A colored long pass filter is an optical filter that allows longer wavelength light to pass through while blocking shorter wavelength light.

It is usually made of colored glass, achieving the filtering effect through the absorption and reflection properties of the materials.

For example:

  • Red long-pass filter: Allows red and infrared light to pass through, while blocking blue and green light.
  • Yellow long-pass filter: Allows through yellow, red and infrared light, while blocking blue light.

Advantages of a color long pass filter:

  • It can effectively distinguish between short waves and long waves.
  • Common ones include red, orange, yellow, green, etc. long-pass filters.
  • Exhibits excellent optical performance within the transmission wavelength range.
  • Utilizes optical-grade colored glass, which is resistant to high temperatures and ultraviolet rays.

The application  of a color long pass filter:

  •  Astronomy

  • Photography and Imaging

  • Industrial Inspection

  •  Research and Optics Experiments

 

Chengyu employs advanced production technologies to offer you a variety of types of filters. Please feel free to contact us at any time or check out our other filters.

 

What is a colored longpass filter?
A colored longpass filter is an optical filter that transmits wavelengths longer than a specified cutoff while blocking shorter wavelengths. The filter’s color depends on its material and coating, which affects its transmission spectrum.
Can longpass filters be used with lasers
Yes, but ensure the filter is rated for the laser’s wavelength and power to avoid damage. High-quality coated glass filters are recommended for laser applications.

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