DAVIDSON OPTRONICS Model D-720 Two Axis DIGITAL Autocollimator

TWO AXIS DIGITAL AUTOCOLLIMATOR -- D-720

The Model D-720 Two Axis DIGITAL Autocollimator excels in measuring two orthogonal planes because both azimuth and elevation readings are obtained at the same time. This eliminates the error often introduced by autocollimator barrel rotation when alternating between azimuth and elevation positions. The Model D-720 functions efficiently on optically fiat surfaces and on aluminized surfaces as small as ½ inch (13 mm) in diameter.

Features:

Measure both orthogonal axes without adjustment

10 arc minute measuring range

Compact folded design makes alignment easy

Built-in adjustable mounting base

Dark field projected reticle enhances return pattern recognition

Certification of accuracy traceable to National Institute of Standards and Technology

Applications:
The Model D-720 Two Axis DIGITAL Autocollimator measures angles around an X-Y axis or intermediate points between obliquely tilted surfaces. 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-720, provides direct angular measurement of the reflective surface deviation through acquisition and measurement of the deviated return beam angle. The Model D-720 incorporates an areal video camera. The included software allows results to be viewed in real-time, statistically analyzed and stored for later reference. The program includes routines for the measurement of angles about orthogonal axes, optical wedges, 90° prism errors, telescope angles and others. Certificates documenting test results are automatically generated.

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

Includes:

Superbright Green (530 nm) LED Light Source & Power Supply

Signal / Power Cable

Computer System with pre-installed software

Complete calibration and Certification

Detailed Specifications:

Sensitivity		0.1 arc second
Accuracy		0.2 arc second over one arc minute, 1 arc second over 10 arc minutes
Repeatability		±0.2 arc seconds or better (standard deviation)
Measuring range		±5 arc minutes
Measuring range at long distances		±2 arc minutes at 35 feet (11 m) ±1 arc minute at 125 feet (38 m)
Aperture Diameter		2⅜ inch (60 mm)
Focal Length		20 inch (508 mm), folded
Image Sensor		IEEE 1394a "FireWire" 700 x 500 pixel CCD
Projected Reticle		Brightline (approximately 6 arc seconds wide) Crosshair on Dark Field
Light Source (includes 115V Power Supply)		P/N 105-2971 Superbright Green 530 nm LED
Housing Material		Aluminum
Base adjustment	Azimuth	±2°
	Elevation	±2°
Overall Dimensions	Height	9 inch (229 mm)
	Width	6 inch (152 mm)
	Length	12½ inch (318 mm)
	Base Length	10½ inch (267 mm)
	Height to Aperture Center	3 inch (76 mm)
Finish		Ivory Enamel
Carrying Case		Finished Hardwood, Ethafoam fitted for instrument and light source
Instrument Weight		21 pounds (10 kg)
Shipping Weight		40 pounds (18 kg)

Optional Accessories:

Model D-247 Table Instrument Stand
Part Number 105-2971 LED Light Source & Power Supply

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