D-279 ALIGNMENT COLLIMATOR
The Model D-279 Alignment Collimator is an optical line of sight testing fixture and target, utilized primarily as a means of testing the straightness of the line of sight of focusable optical instruments. In addition, the Model D-279 may be utilized as an infinity target or bench mark for calibrating focused instruments.
- Optical line of sight testing
- Straightness of focusable optical Instruments
- Infinity target
- Bench mark
- Certification of accuracy traceable to NIST
Six filar-bifilar type reticles provide alignment targets at different distances from the collimator objective. The virtual image distance of each reticle (0 Inch, 8 Inch, 16 Inch, 32 Inch & 64 Inch) (0 mm, 203 mm, 406 mm, 813 mm & 1.625 m) is inscribed in inches on the first quadrant of that reticle. The infinity reticle has the additional feature of a stadia scale with graduations equal to 1 minute ±2 arc seconds.
Specifications:
| Reticles: | Alignment: | within 5 arc min |
| Concentricity: | within 0.001 inch (25 μm) of barrel outside diameter |
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| Dust Prevention: | The zero reticle on the front and a filter on the rear seal the collimator against dust | |
| Light Source Adapter: | Standard 2 inch-24 N.S. Threads | |
| Aperture: | 1.34375 inch (34 mm) | |
| Focal Length: | 14.3 inch (363 mm) | |
| Material: | Hardened stainless steel | |
| Overall Dimensions: | Length: | 13.36 inch (339 mm) |
| Diameter: | 2.249 7±0.000 1 inch (57 mm) concentric to optical axis | |
| Finish: | Polished chrome plate | |
| Carrying Case: | Hardwood | |
| Weight: | 12 lbs (5.4 kg) | |
| Shipping Weight: | 20 lbs (9.1 kg) | |
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Support Documentation |
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D-279 Drawing |
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