Absorption Filters

Filters are optical elements with specific spectral transmission characteristics. They are used to modify the properties of a light source or to block unwanted wavelengths of light. Absorption filters (colour filters) function on the basis of choosing a glass recipe with chromophoric constituents w ...Read more

Filters are optical elements with specific spectral
transmission characteristics.
They are used to modify the properties of a light
source or to block unwanted wavelengths of light.

Absorption filters (colour filters) function on the
basis of choosing a glass recipe with
chromophoric constituents which absorb a specific
range of wavelengths. Typically these are long
pass edge filters, but some bandpass types with
limited functionality are available. 

Note that this filter type may fluoresce when used
for blocking UV light.



Filters are optical elements with specific spectral transmission characteristics. They are used to modify the properties of a light source or to block unwanted wavelengths of light.

Absorption filters (colour filters) function on the basis of choosing a glass recipe with chromophoric constituents which absorb a specific range of wavelengths. Typically these are long pass edge filters, but some bandpass types with limited functionality are available. Note that this filter type may fluoresce when used for blocking UV light.

Range of dimensions: 1mm – 300mm

Highest available surface figure: λ/4 (DIN: 3/0,5)

Highest available surface quality: 40-20 S/D (DIN: 5/2x0,16)

Highest available tolerance of beam deviation: 3” (arcsec)