Color Glass Filters for Precision Spectral Control

Union optic Color Glass Filter

Union optic Color Glass Filter

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Sold by: Union Optic Ships from: China
Specifications
Shape: Round, Square, Custom
Size: 25.4 mm
Thickness: 3 mm
Color Series: Yellow, Orange, Red & Black, IR Transmitting, Black & Blue, UV Transmitting, Colorless, VIS Tr, IR Abs, Green, Blue, Blue-Green, Multi-Band

Did You Know?

There are about as many types of glass filters as there are applications for them. Color glass filters, due to their selective absorption in the visible wavelength range, will exhibit various colors depending on the glass type. Optical color glass filters are used in a variety of laboratory and industrial applications, such as safety glasses, industrial measurement, regulation technology and environmental protection. In addition to the visible light wavelength range, color glass filters are also available for infrared, ultraviolet, and colorless transmission requirements. Additionally, color glass filters vary in size, shape, and thickness depending on the application.

Related Resources

Frequently Asked Questions

Color glass filters are bulk-absorbing optical filters made from doped glass that selectively transmit certain wavelength bands while absorbing or attenuating others throughout the glass volume. Unlike interference (thin-film) filters, which rely on multilayer coatings and exhibit angle-sensitive spectral shifts and higher finesse, color glass filters provide broadband, relatively angle-insensitive transmission with smooth spectral slopes and high environmental stability but typically lower peak transmission and broader passbands.

Overview of Color Glass Filters

Color Glass Filters are absorptive optical filters manufactured from doped glass compositions that selectively transmit defined wavelength bands while attenuating others. Unlike thin-film interference filters, Color Glass Filters rely on bulk absorption, offering stable spectral characteristics, high damage thresholds, and minimal angle sensitivity across UV, visible, and NIR regions.

On FindLight, Color Glass Filters are available as discrete components for light transport applications, beam conditioning, and spectral shaping in imaging and illumination systems.

Typical Specifications

Available Color Glass Filters on this page span multiple spectral ranges and formats. Typical specifications include:

  • Spectral range: UV (<300 nm), visible (400–700 nm), and NIR (700–1100+ nm), with defined pass and blocking bands.
  • Optical density (OD): Common blocking levels from OD1 to OD5 and higher, specified over target stopbands.
  • Transmission: Peak in-band transmission often 70–90%, depending on glass type and thickness.
  • Thickness: Standard substrates from 1 mm to 3 mm or more; thickness directly affects cutoff slope and OD.
  • Surface quality and flatness: Typical values around 60-40 scratch-dig or better and λ/4–λ/2 flatness for most light transport tasks.
  • Dimensions: Circular and rectangular formats, from small-diameter filters for compact modules to larger plates for lab setups.

Applications of Color Glass Filters

Color Glass Filters are used for camera and sensor protection, fluorescence excitation and emission separation, visual alignment beams, spectral shaping of LEDs and lamps, and general purpose stray-light suppression in optical benches. Their low angular dependence makes them suitable for divergent or convergent beams in light transport assemblies.

Buyer Guidance on FindLight

When selecting Color Glass Filters, compare the detailed transmission curves, optical density across unwanted bands, substrate thickness, and available clear aperture. Consider thermal load, required damage threshold, and mechanical integration with your existing mounts or OEM module.

Use FindLight to review multiple Color Glass Filters side by side, then contact suppliers directly to request quotes or discuss custom dimensions and coatings. No registration is required to send inquiries, helping procurement engineers and R&D teams move from specification to quotation efficiently.