An autocollimator is an optical instrument for non-contact measurement of angles. They are typically used to align components and measure deflections in optical or mechanical systems. An autocollimator works by projecting an image onto a target mirror, and measuring the deflection of the returned image against a scale, either visually or by means of an electronic detector. A visual autocollimator can measure angles as small as 0.5 arcsecond, while an electronic autocollimator can be up to 100 times more accurate.

Visual autocollimators are often used for lining up laser rod ends and checking the face parallelism of optical windows and wedges. Electronic and digital autocollimators are used as angle measurement standards, for monitoring angular movement over long periods of time and for checking angular position repeatability in mechanical systems. Servo autocollimators are specialized compact forms of electronic autocollimators that are used in high speed servo-feedback loops for stable platform applications.

ee also



*cite web | author=Lowell, Tom| year=| title=Small Angles and Autocollimators | format=HTML | work=Vermont Photonics | url= | accessdate=2006-05-07
*cite web | author=Morel, Jerrat| year=| title=Principles of Operation | format=HTML | work=Micro-Radian Instruments | url= | accessdate=2007-05-14

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • autocollimator — autokolimatorius statusas T sritis Standartizacija ir metrologija apibrėžtis Plokščiųjų kampų, paviršių plokštumo, jų lygiagretumo ar statmenumo optinis matuoklis. atitikmenys: angl. autocollimator; tubular collimator vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • autocollimator — autokolimatorius statusas T sritis fizika atitikmenys: angl. autocollimator; tubular collimator vok. Autokollimationsfernrohr, n; Autokollimator, m rus. автоколлиматор, m pranc. autocollimateur, m …   Fizikos terminų žodynas

  • autocollimator — /aw toh kol euh may teuhr/, n. Optics. an instrument combining the functions of a telescope and collimator, for detecting and measuring very small deviations in a beam of light. [AUTO 3 + COLLIMATOR] * * * …   Universalium

  • autocollimator — noun A device that uses a plane mirror to align or collimate optical devices See Also: autocollimation …   Wiktionary

  • autocollimator — au·to·collimator …   English syllables

  • autocollimator — “+ noun ( s) Etymology: aut + collimator : a telescope with eyepiece adapted to the method of autocollimation either to collimate the instrument itself or to ensure that its axis is perpendicular to a reflecting surface * * * /aw toh kol euh may… …   Useful english dictionary

  • Collimated light — In the lower picture, the light has been collimated. Collimated light is light whose rays are parallel, and therefore will spread slowly as it propagates. The word is related to collinear and implies light that does not disperse with distance… …   Wikipedia

  • Collimator — Example of a particle collimator A collimator is a device that narrows a beam of particles or waves. To narrow can mean either to cause the directions of motion to become more aligned in a specific direction (i.e., collimated or parallel) or to… …   Wikipedia

  • Optical instrument — An optical instrument either processes light waves to enhance an image for viewing, or analyzes light waves (or photons) to determine one of a number of characteristic properties. Contents 1 Image enhancement 2 Analysis 3 Other optical devices …   Wikipedia

  • Autocollimation — is a process by which the focal length of a diverging lens is determined. Autocollimation involves placing a light source at the focal length of a converging lens on one side and a screen at the same distance on the other side so that the image… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”