D-652 5 INCH APERTURE AUTOCOLLIMATORS
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The D-652 Coordinate Autocollimator combines a 5 inch (127 mm) aperture with a 26 inch (660 mm) focal length optical system into an 18 inch (457 mm) 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 assistance.
Model D-652 Autocollimators measure 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. |
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There are no screws to loosen or tighten and no distracting numbers or scales in the field of view. This simplicity makes the D-652 very useful for aligning polygons, precision rotary tables, optical systems and laser optics. Several reflectors can be accommodated simultaneously with the 5 inch (125 mm) aperture. This feature saves the cost of a second autocollimator.
The D-652-103 has a filar eyepiece that rotates 90° and a readout dial toward the rear of the instrument, otherwise it is identical to the D-652-101.
The Model D-652 Autocollimator is also available in a configuration optimized for operation at near-infrared wavelengths.
The Digital Autocollimator Upgrade Kit allows existing D-652 models to have all the digital functionality of the New Model D-720, Digital Two-Axis Autocollimator.
The upgrade kit replaces the autocollimator eyepiece assembly with a video imager. The included OptiAngle 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 more. Certificates documenting test results are automatically generated.
For more theory of operation, please refer to the Principles of Autocollimation Application Note.
Specifications:
| Readout: | The second dial is graduated in divisions of 0.2 arc sec, with each arc sec indicated by an extended graduation line and every fifth arc sec numbered. The arc min dial is graduated and numbered 1 through 20 with every number equal to one revolution of the dial (60 arc sec) | |
| Filar Reticle: | Crosshair with Elevation line defined “EL” and Azimuth line defined “AZ” | |
| Target Reticle: | Illuminated concentric circles, approximately 2 arc min apart, around an illuminated centered dot, approximately 10 arc sec in diameter, all on a dark field | |
| Measuring Range: | 20 arc min | |
| Accuracy: | 0.5 arc sec over one arc min, 3 arc sec over 20 arc min (Calibration curve over full range available at nominal cost) |
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| Sensitivity: | 0.1 arc sec | |
| Repeatability: | ±0.2 arc sec or better (standard deviation) | |
| Operating Distance: | At 50 feet (15 m) the measuring range is ±10 arc min (15.2 m) | |
| Aperture Diameter: | 5 inch (127 mm) | |
| Power Source: | 110V/ 60Hz or 220V/ 50Hz | |
| Eyepiece Magnification: | 12X (24X available) | |
| Focal Length: | 28.625 inch (727 mm) | |
| Base Adjustment: | Azimuth: | ±1.5° |
| Elevation: | ±1.5° | |
| Overall Dimensions: (L x W x H) |
12 x 9 x 18 inch (305 x 229 x 457 mm) | |
| Base Plate Dimensions: | 13 x 9 inch (330 x 229 mm) Mounting holes provided | |
| Height to Aperture Center: | 4.5 inch (114 mm) | |
| Finish: | Ivory Enamel | |
| Carrying Case: | Fiberglass, fitted for instrument and light source | |
| Weight: | 50 lbs (22.7 kg) |
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| Shipping Weight: | 90 lbs (40.8 kg) |
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Optional Accessories:
Model D-165 High Intensity Light Source 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
104-0160-652 Autocollimator Alignment Aide
104-0170-652 Digital Autocollimator Upgrade (for existing D-652’s)
105-2761-652 Analog Video Camera Subsystem
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