Photonics Dictionary: R

The average length in a specific material in which a relativistic charged particle will lose 67 percent of its energy by bremsstrahlung.

An optical fiber in which ions of a rare-earth element, such as neodymium, erbium or holmium, have been incorporated into the glass core matrix, yielding high absorption with low loss in the visible...

A type of internal focusing in which only the lens elements closest to the rear of the lens barrel are moved.

A reflection grating is an optical component that consists of a series of closely spaced, parallel reflecting surfaces or grooves. These grooves are typically ruled or etched onto a flat substrate or...

A closely spaced series of well-known chemicals having a refractive index lying between 1.33 for water and 1.95 for a solution of phosphorus in carbon disulfide. They are used to identify powdered...

Loss mechanisms that degrade the performance of all thin-film optical devices by removing radiant flux out of the specular beams.

A ring laser gyroscope (RLG) is a type of gyroscope that uses laser light to detect and measure changes in orientation. It operates based on the Sagnac effect, which is a fundamental principle of...