DAVIDSON OPTRONICS Model D-672 Electronic Signal Autocollimators

ELECTRONIC SIGNAL AUTOCOLLIMATORS -- D-672

The Davidson Optronics Model D-672 Single-Axis Electronic Signal Autocollimator consists of an optical unit featuring rugged one-piece cast construction and an electronic unit featuring modular circuitboard design. This combination of advanced design and construction offers stability on the order of 0.25 arc second drift in a 24-hour period in a stable environment.
Features:

Output error signal provides remote control operation

Micrometer dial provides readout to 0.10 arc second

Rugged one piece casting offers stability

Large aperture for reflector sharing

Certification of accuracy traceable to National Institute of Standards and Technology

The total system is designed to monitor an external reflector and to present any angular deviations in the form of three separate readouts. These three modes of readout are:

Manual,

D.C. error signal and

A.C. error signal

Manual readout to 0.10 arc second is easily made with the two-speed micrometer. Nulling of the instrument is possible with the center zero meter on the electronic unit, and the meter can be adjusted with the gain and sensitivity control to represent true angular values.
With nulling accuracy to 0.05 arc second and remote control capabilities, the D-672 Single-Axis Electronic Signal Autocollimator will prove a valuable addition to your laboratory or quality control department.
Applications:
The Model D-672 Single-Axis Electronic Signal Autocollimator measures angles around an axis or at intermediate points between obliquely tilted surfaces.
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 more theory of operation, please refer to the Principles of Autocollimation Application Note.

Detailed Specifications:

* An asterisk denotes Model D-672-1200 specifications different from those of the Model D-672-200.

Sensitivity		With gain and meter sensitivity controls properly set, small angular deviations about a null position can be sensed to 0.05 arc second.
Accuracy		±0.1 arc second over 10 seconds ±1.0 arc second over 200 seconds * ±1.0 arc second over 100 seconds * ±5.0 arc seconds over 1200 seconds (Calibration curve over full range available at nominal cost)
Measuring range		0 - 200 arc seconds * 0 - 1200 arc seconds
Measuring range at long distances		±10 arc minutes at 35 feet ±2 arc minutes at 125 feet
Linearity		±0.25 arc second over full range * ±2.50 arc seconds over full range
Acquisition Range		±1 arc minute at 130 feet ±10 arc minutes at 15 feet or less * ±1 arc minute at 160 feet * ±15 arc minutes at 15 feet or less
Stability		Maximum drift in stable environment 0.25 arc second in a 24 hour period
Warm-Up Time		60 seconds to achieve normal sensitivity
Output A.C. Error Signal		"EXT SIG" receptacle provides for external servo control or A.C. external meter readout Located on back of electronics unit
Angle Error Meter		Readout on D.C. center zero meter Located on front panel of electronics unit
Nulling Dial		Visual indication of angular deviations obtained from arc seconds and revolutions dials Located on optical unit
Aperture Diameter		2-3/8"
Focal Length		20"
115V Power Supply		20 watts
Housing Material		Cast Aluminum
Optics Unit Dimensions	Height	7"
	Width	6"
	Length	11Ľ"
	Base Length	1˝"
	Height to Aperture Center	1.88"
Electronics Unit Dimensions	Height	9"
	Width	7Ľ"
	Length	9Ľ"
Power Cable		8' ±6"
Interconnecting Cable		10' ±6"
Finish		Ivory Enamel
Carrying Case		Ethafoam lined Finished Hardwood
Weight	Optics Unit	13 pounds
	Electronics Unit	15 pounds
Shipping Weight		40 pounds

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