Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
Photonics Dictionary

Pellin-Broca prism

A form of dispersing prism, often used in monochromators, that consists of a common right-angle prism with a 30° dispersing prism attached to each of its square faces. The spectrum formed by the prism is the same as if the two 30° prisms were joined together to form a single 60° prism. The particular ray that would pass through the 60° prism in minimum deviation is turned through a right angle in the Pellin-Broca prism, for which reason the latter often is referred to as a constant deviation prism. When this prism is rotated about an axis parallel to the refracting edges, the spectrum moves laterally past the exit slit of a monochromator.
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x We deliver – right to your inbox. Subscribe FREE to our newsletters.