A measure of the total radiant energy incident on a surface per unit area.  Also Radiant Exposure.

A source of optical radiation with an angular subtense at the cornea larger than α_min. Also, see Point Source.

An imaging technique with solid-state lasers that has several limitations: non-uniform energy distribution, very short working distances, and poor control of hole geometry.

Source of powerful light; often in the form of a helical coil and used to excite photon emission in a solid-state laser.

A printing process involving laser-engraved, seamless rubber plates.