DAVIDSON OPTRONICS Model D-600 Comparison Autocollimator

COMPARISON AUTOCOLLIMATOR -- D-600

The Model D-600 Comparison Autocollimator employs a new principle of autocollimation to compare and measure small angles to a precision heretofore considered impossible. Specifically, the instrument measures the difference in angle between two reflecting surfaces.

Features:

Measure angular differences between two reflecting surfaces to ±0.1 arc second
Readings are not affected by instrument movement
Extremely simple to check surface plates or machine tool alignment
Measure about either vertical or horizontal axis

A beam of collimated light from the instrument is divided to illuminate a reference mirror and a second mirror whose relative angle is to be determined. The patented design employs a unique arrangement of optical tipping plates coupled to a calibrated micrometer dial, where the relative angle is read when the images are aligned.

Differences in angle of the returning beams can be measured with average repeatability of 1/10 arc second, either vertically or horizontally. The micrometer dial is graduated in 1/10 arc second increments, with each arc second numbered. One complete revolution of the dial is equal to 10 arc seconds, and total range is 120 arc seconds.

Of utmost importance to precision is the fact that instrument movement during reading will only move the images in the field of view; it will have absolutely no effect on the reading. This fact eliminates the rigid mounting and extreme handling care demanded by other instruments, where any motion is translated directly into the instrument's readings.

For theory of operation, please refer to the Principles of Autocollimation Application Note.

Detailed Specifications:

Sensitivity		1/10 arc second
Accuracy		±½ arc second
Measuring Range		120 arc seconds
Micrometer Scale		1/10 arc second graduations 10 arc seconds per revolution
Aperture Diameter		2-3/8"
Focal Length		20"
Light Source		GE #328 lamp (2 spares included)
115V Power Supply		Model D-416 Power Pack, variable from 0 though 6 volts DC
Housing Material		Aluminum
Overall Dimensions	Height	5-1/8"
	Width	5-3/8"
	Length	23"
Finish		Ivory Enamel
Carrying Case		Finished Hardwood, Ethafoam fitted for instrument and light source
Instrument Weight		10 pounds
Shipping Weight		35 pounds

Optional Accessories:

Model D-165 High Intensity Light Source. This option may be required when autocollimating off of low reflectivity surfaces or small mirrors.
Model D-247 Table Instrument Stand
Model D-416B 220V 50Hz Power Supply

Davidson Optronics, Inc.
Phone: (626) 962-5181
Fax: (626) 962-5188
E-mail: sales@davidsonoptronics.com