autocollimator


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autocollimator

[¦ȯd·ō′käl·ə‚mād·ər]
(optics)
A device by which a single lens collimates diverging light from a slit, and then focuses the light on an exit slit after it has passed through a prism to a mirror and been reflected back through the prism.
A telescope which has a graduated reticle, enabling an observer to read off the angles subtended by distant objects.
A convex mirror at the focus of the principal mirror of a reflecting telescope, which causes light to leave the telescope in a parallel beam.
A telescope equipped with an eyepiece designed for autocollimation.
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References in periodicals archive ?
However, the largest potential uncertainty of autocollimator measurements arises from optical aberrations in imaging non-flat artifacts.
Hardly a dimenewcomer to machine-tool calibration, the autocollimator was created for this use in the '40s, replacing cumbersome master straight edges, squares, and flats.
Thus with the help of one polygon and one autocollimator it is possible at a certain pitch (depending on the number of polygon edges) to determine edge values of the tested device (test rig in our case) within a full circle.
Using an autocollimator and a reference prism, this angle was measured with a statistical standard uncertainty of better than 1" and a combined standard uncertainty of [+ or -] 9".
The reference measure used for the calibration of vertical angle measurement accuracy for machine engineering and geodetic instruments is based mainly on the use of multiangle prism--polygon [4, 7] or precision rotary encoder connected to the axis of the test bench and equipped with an autocollimator placed in front of the axis of optical tube of the instrument.
ALIGNMENTLASER, AUTOCOLLIMATOR, DISPLACEMENT, INDEXING_AUTOCOLLIMATOR, INDEXING_LEVELS, INDEXING_LASER_INTERFEROMETER, INDEXING_DISPLACEMENT, LASER_BALL_BAR, LASER_INTERFEROMETER, LEVELS, MANDREL, ND_LASER, POLYGON_AUTOCOLLIMATOR, POLYGON_LASER_INTERFEROMETER, POLYGON_ND_LASER, ROTARY_ENCODER, SCALE, STRAIGHTEDGE, WIRE);
Tenders are invited for Supply, Erection And Commissioning Of Autocollimator, Qty.
To ensure high reliability, they should be calibrated using standard instruments such as an indexing table along with an autocollimator (Just et al.
An optical device called an autocollimator is used to analyze the pitch and yaw.
An autocollimator is used to transfer the level to a small, flat mirror probe on a leveling assembly.
During the fourth quarter, the company released the Laser Distance Sensor (LDS) electronic autocollimator for non-contact measurement and alignment tasks in laboratory and industrial settings.