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> Davidson comparison autocollimator model D600
Davidson comparison autocollimator model D600
Model D-600 comparision autocollimators apply a new principle of autocollimation to compare and measure small angles to a precision hertofore considered impossible.
* Measures angular differences between two reflecting surfaces to +/- 0.1 second of arc
* Readings are not affected by instrument movement
* Extremely simple to check surface plates or machine tool alignment
* Measures either vertical or horizontal axis
* Sensitivity - 1/10 second of arc
* Accuracy - +/- 1/2 second of arc
* Measuring Range 120 seconds of ard
* Aperture Diameter - 2 3/8" inches
