D-672 ELECTRONIC SIGNAL AUTOCOLLIMATORS
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.
- 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 NIST
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.
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 sec | |
| Accuracy: | ±0.1 arc sec over 10 sec ±1.0 arc sec over 200 sec * ±1.0 arc sec over 100 sec * ±5.0 arc sec over 1,200 sec (Calibration curve over full range available at nominal cost) |
|
| Measuring range: | 0 - 200 arc sec * 0 - 1200 arc sec |
|
| Measuring range at long distances: | ±10 arc min at 35 ft; ±2 arc min at 125 ft | |
| Linearity: | ±0.25 arc sec over full range * ±2.50 arc sec over full range |
|
| Acquisition Range: | ±1 arc min at 130 ft ±10 arc min at 15 ft or less * ±1 arc min at 160 ft * ±15 arc min at 15 ft or less |
|
| Stability: | Maximum drift in stable environment 0.25 arc sec in a 24 hour period |
|
| Warm-Up Time: | 60 sec 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 |
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| Aperture Diameter: | 2.375 inch (60 mm) | |
| Focal Length: | 20 inch (508 mm) | |
| 115V Power Supply: | 20 watts | |
| Housing Material: | Cast Aluminum | |
| Optics Unit Dimensions: | Height: | 7 inch (178 mm) |
| Width: | 6 inch (152 mm) | |
| Length: | 11.25 inch (286 mm) | |
| Base Length: | 1.5 inch (38 mm) | |
| Height to Aperture Center: | 1.88 inch (48 mm) | |
| Electronics Unit Dimensions: | Height: | 9 inch (229 mm) |
| Width: | 7.25 inch (184 mm) | |
| Length: | 9.25 inch (235 mm) | |
| Power Cable: | 8 ft ±6 inch (2.4 m ±152 mm) | |
| Interconnecting Cable: | 10 ft ±6 inch (3 m ±152 mm) | |
| Finish: | Ivory enamel | |
| Carrying Case: | Hardwood | |
| Weight: | Optics Unit: | 13 lbs (5.9 kg) |
| Electronics Unit: | 15 lbs (6.8 kg) | |
| Shipping Weight: | 40 lbs (18.1 kg) | |