A European proof of conformity that allows manufacturers and exporters to circulate products freely within the European Union.  The letters "CE," French for "Conformite Europeenne," [..]

A measure of the detecting ability or sensitivity of a photodiode. The reciprocal of noise equivalent power (NEP). 

A perfectly diffuse reflecting surface, where light is scattered equally in all directions.

Measure of the angular difference between the propagating axis (where the laser light is pointing) and the mechanical axis (where the housing is pointing). To measure, spin the housing of the laser an [..]

An automatic function in cameras that gives higher photometric weight to objects in the center of the field of view than to those in the periphery. It increases local contrast to help avoid silhouetti [..]

The amount of play (lost motion) between a set of moveable parts when changing the direction of travel.

Also referred to as passband or bandpass, a wavelength range used to denote a specific part of the spectrum that passes incident energy through a filter. The first order is always at the design wavele [..]

Color filter array on an imaging sensor that allows for production of color images when deciphered by an algorithm.

The calculated distance between two exactly opposed points on a beam at a chosen fraction of peak power (typically 1/e2). It is also defined as the diameter of a circular aperture that will pass a spe [..]

The increase in cross-sectional area of a propagating beam of light that is not perfectly collimated.