| Product Description |
| The Model D-656 Two Axis Autocollimator excels in measuring two orthogonal planes because both azimuth and elevation readings are obtained with the same dial. This eliminates the error often introduced by autocollimator barrel rotation when alternating between azimuth and elevation positions. The midsection eyepiece has sufficient eye relief for those who wear glasses; also, eye strain is reduced by the dark field reticle with illuminated target (see above) and the distinct black crosshair filar marked to show azimuth and elevation. Rotating the micrometer dial causes the filar to travel across the field until the proper line bisects the center of the target. No numbers or scales confuse the field of view, but are carried entirely on the micrometer drum. The Model D-656 functions efficiently on optically fiat surfaces and on aluminized surfaces as small as ½ inch in diameter. |
