5" APERTURE AUTOCOLLIMATORS -- D-652 * The Model D-652 Autocollimator combines a 5" aperture and a 26" optical system in an 18" long instrument.  The short coupled design and the midsection eyepiece make it possible for one operator, while viewing through the eyepiece, to adjust one or more mirrors without an assistant. Features: Aperture size accommodates multiple reflectors 20 arc minute measuring range Compact folded design makes alignment easy Built-in adjustable mounting base Center tilted eyepiece for easy viewing Dark field projected reticle and external readout reduce eye fatigue Certification of accuracy traceable to National Institute of Standards and Technology There are no screws to loosen or tighten, no confusing numbers or scale in the field of view.  Its simplicity makes the Model D-652 very useful for aligning polygons, precisions rotary tables, optical systems, and laser optics.  Several reflectors can be accommodated simultaneously with the 5" aperture.  This feature saves the cost of a second autocollimator. Applications: The Model D-652 Autocollimator measures angles around an X-Y axis or intermediate points between obliquely tilted surfaces.  The filar bisection of the target gives a corresponding read-out in arc minutes and seconds on the adjoining micrometer drum, either for azimuth or elevation.  Azimuth and elevation adjustment are quickly made with fine thread adjustment screws mounted in base. Autocollimator functions: The basic function of an autocollimator is to detect and measure a deviation in the position of a reference reflective surface.  The autocollimator projects a collimated beam of light onto a reflective surface.  When a deviation in the position of that reflective surface occurs, a deviated beam of collimated light returns to the autocollimator.  A direct angular reading autocollimator, such as the Model D-652 Autocollimator will provide a direct angular measurement of the reflective surface deviation through acquisition and measurement of the deviated return beam angle. For more theory of operation, please refer to the Principles of Autocollimation Application Note.

Detailed Specifications (for the Model D-652-101 Two Axis Autocollimator):

The Model D-652-103 Coordinate Autocollimator has a filar eyepiece that rotates 90° and a readout dial toward the rear of the instrument, otherwise it is identical to the Model D-652-101 Two Axis Autocollimator.

* The Model D-652 Autocollimator is also available in a configuration optimized for operation at near-infrared wavelengths.

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
• P/N 105-2761-652 Video Camera & Monitor with integral camera power supply.  With this option readings become very easy even for unskilled personnel.  Repeat readings are more accurate and faster.  The camera eliminates any errors from parallax and greatly reduces eye fatigue.  This option is easily added to existing Model D-652's.

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

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Most recently updated: November 23, 2007