D-720 TWO AXIS DIGITAL AUTOCOLLIMATOR
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 flat surfaces and on aluminized surfaces as small as 0.5 inch (13 mm) in diameter.
- 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 NIST
Applications:
The 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 D-720, provides direct angular measurement of the reflective surface deviation through acquisition and measurement of the deviated return beam angle. The 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
Specifications:
| Sensitivity: | 0.1 arc sec | |
| Accuracy: | 0.2 arc sec over one arc min, 1 arc sec over 10 arc min | |
| Repeatability: | ±0.2 arc sec or better (standard deviation) |
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| Measuring range: | ±5 arc min | |
| Measuring range: @ long distances: |
±2 arc min at 35 ft (11 m) ±1 arc min at 125 ft (38 m) |
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| Aperture Diameter: | 2.375 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 : | 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: | 12.5 inch (318 mm) | |
| Base Length: | 10.5 inch (267 mm) | |
| Height to Aperture Center: | 3 inch (76 mm) | |
| Finish: | Ivory enamel | |
| Carrying Case: | Finished hardwood | |
| Weight: | 21 lbs (9.5 kg) | |
| Shipping Weight: | 40 lbs (18.1 kg) | |
Optional Accessories:
Model D-247 Table Instrument Stand
Part Number 105-2971 LED Light Source & Power Supply
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Support Documentation |
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D-720 Drawing |
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