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AUTOMATIC AUTOCOLLIMATORS -- D-696/D-697

The Model D-696 Two Axis Automatic Autocollimator is a unique and highly advanced electro-optical instrument.  It monitors angular changes of an external reflector simultaneously in both the azimuth and elevation axes.  Accurate readings of these changes may be taken manually, automatically utilizing the dials for continuous reflection observations, electronically for accurate nulling or meter readout and electronically utilizing the optional logic option circuit board which provides a binary coded signal for direct input into a computer.  Also AC and DC error signals are provided with outputs on the back of the electronics cabinet.

    Features:
    • "Plug-in" circuit boards to facilitate field maintenance
    • Versatile design provides full measuring capabilities in manual, electronic signal and automatic modes
    • Extremely fast response time with improved stability
    • Logic Option provides binary signal that may be fed directly into a computer automatic modes

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-672 Single-Axis Electronic Signal Autocollimator, will provide a direct angular measurement of the reflective surface deviation through acquisition and measurement of the deviated return beam angle.

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

Detailed Specifications:

Sensitivity ±0.1 arc second
Accuracy Automatic Position ±0.2 arc second over 10 arc seconds
±0.75 arc second over 100 arc seconds
(with minimum 1.0" diameter reflector)
Meter Position ±0.1 arc second over 10 arc seconds
±0.75 arc second over 100 arc seconds
Accurate to within 20% in analog mode (±6 arc seconds)
(Meter in conjunction with dial for nulling)
Measurement Range 100 arc seconds
Cross Coupling ±1 arc second
Linearity ±0.1 over 10 arc second range
±0.5 arc seconds over full range
Acquisition Range 90 arc minutes, decreasing to
100 arc seconds at a distance of 130 feet
Warm-Up Time 10 minutes
to achieve normal sensitivity
Automatic Tracking Response Time 40 arc seconds per second of time
Output A.C. Error Signal 0.05 seconds of time
Meter and D.C. Error Signal Varies with time constant control
Located on front panel of electronics unit
Analog Potentiometer Accurate to 0.75% of the total range
Visual Nulling Dials 2 provided to indicate angular deviations obtained from
arc seconds and revolutions dials
Located on optical unit
Acquire Lamp Illuminates when image is within the acquisition range
Electronics Solid State
115V Power Supply 80 watts
Aperture Diameter 2"
Support Stand 3 degrees elevation adjustment
Housing Material Cast Aluminum
Optics Unit Dimensions Height 9-3/8"
Width 11"
Length 18-15/16"
Base Length 10-13/16"
Height to Aperture Center 3-1/8"
Support Stand Dimensions Length 11-7/8"
Width 8"
Thickness 3¾"
Electronics Unit Dimensions Height 9¾"
Width 24"
Depth 16¼"
Power Cable 8' ±6"
Interconnecting Cable 10' ±6"
Finish Ivory & Black Enamel
Weight Optics Unit 36½ pounds
Electronics Unit 57¾ pounds
Shipping Weight 135 pounds

NOTE: The specifications and description contained in this bulletin also pertain to the Model D-697 Single Axis Automatic Autocollimator.

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