autocollimation


Also found in: Wikipedia.

autocollimation

[¦ȯd·ō‚käl·ə′mā·shən]
(optics)
A procedure for collimating a telescope or other optical instrument with objective and crosshairs, in which the instrument is directed toward a plane mirror and the crosshairs and lens are adjusted so that the crosshairs coincide with their reflected image.
References in periodicals archive ?
Zhigang, "Research on Automatic Focusing Technique Based on Image Autocollimation," Optik-International Journal for Light and Electron Optics, vol.
(2) Optoelectronic autocollimation method [7]: for long focal length aviation cameras with photographic film as a recording medium, optoelectronic autocollimation method is preferred.
First was to employ autocollimation testing during the figuring process.
This level mirror probe can then be used to make all the lasers vertical by autocollimation of the reflected light.
3A and can be compared to a distribution that would have been obtained with a constant field size or autocollimation, as shown in Fig.
This finding was further supported by Ronchi tests made while I viewed bright stars and also during bench testing done with a double-pass autocollimation setup using a green-laser light source.
Porter, for example, favored the autocollimation null test for paraboloids, where a large flat mirror bounces the light a second time off the concave primary, doubling any errors seen at the focus.