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4 terms
Photonics Dictionary
Clear All Filters x
afocal systems x
afocal
An optical system with object and image points at infinity. Literally, "without a focal length."
beam expander
A system of optical components designed to increase the diameter of a radiation beam. Usually an afocal system.
optical dynameter
A small low-power microscope or magnifier with a scale that is used to measure the exit pupil diameter and eye relief on visual instruments. Optical dynameters are often used to measure the...
perfect lens
A theoretical, ideal lens capable of producing perfect images. Used as a lens design and analysis tool to image collimated output from an afocal system.
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