grism
Sign in to saveAlso known as grating prism, prism spectrometer
thumb|upright=1.5|Simplified working principle of grisms
Wikidata facts
- Subclass of
- optical instrument
- Has part
- diffraction grating
- Image
- Grating prism2.png
- Has use
- prism spectrometer
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- Commons category
- Grisms
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Encyclopedic overview
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thumb|upright=1.5|Simplified working principle of grisms
A grism (also called a grating prism) is a combination of a prism and grating arranged so that light at a chosen central wavelength passes straight through. The advantage of this arrangement is that one and the same camera can be used both for imaging (without the grism) and spectroscopy (with the grism) without having to be moved. Grisms are inserted into a camera beam that is already collimated. They then create a dispersed spectrum centered on the object's location in the camera's field of view.
Excerpted from Wikipedia’s “grism” article, available under the CC BY-SA 4.0 licence.