60 SECOND DEVIATION WEDGE -- D-636 The deviation angle for the Model D-636 60 Second Deviation Wedge wedge ranges between 60 and 65 seconds, with the exact angle certified to 0.5 arc second.  The ability to produce nearly any precise angle within the range of the instrument makes the D-636 an accurate and dependable standard for scale factor testing of collimators, autocollimators, windows, rotary tables, and other wedges. Features: Used as precision lab calibration standard Generates 0 to 60 arc second deviations within 0.1 arc second Certification of accuracy traceable to National Institute of Standards and Technology From the sketch below it is apparent that the Model D-636 wedge rotation causes the vertical and horizontal angular components of deviation to vary between 0 and 60 arc seconds.  Rotational position of the wedge is read directly from a 0 to 359 arc minute scale engraved on the wedge itself.  Direct reading to 1 arc minute permits computation of horizontal and vertical angular components of deviations to 0.1 arc second. Angle D - The calibrated angle of the wedge Angle A - The apex angle of the cone (twice angle D) Angle W - Angular portion of the wedge, as read through the microscope Angle H - Horizontal angular component of deviation introduced by the deviation angle D Angle V - Veritcal angular component of deviation introduced by the deviation angle D H = D sin(W)  and  V = D cos(W)

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Davidson Optronics, Inc.
Phone: (626) 962-5181
Fax: (626) 962-5188
E-mail: sales@davidsonoptronics.com

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Most recently updated: November 23, 2007