autocollimation


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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 ?
Tenders are invited for Theodolite With Autocollimation Accessories
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.
Autocollimation - a feature that automatically selects the correct collimation size for the patient's body part.
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.
The probe's non-contact dual sensors use laser triangulation and autocollimation to accurately gauge the position and angular orientation of the suspension arm's surface.
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.