NIST Gets New Angle on X-Ray Measurements (IMAGE)

National Institute of Standards and Technology (NIST)

NIST Gets New Angle on X-Ray Measurements

Caption

A laser from the NIST-designed autocollimator (square device at top) is beamed at the mirrored polygon in the gray circle at left, and its reflection allows the angle of the polygon's faces to be precisely determined while the polygon rotates. The black device at bottom takes measurements that minimizes the wobbling the polygon experiences while spinning.

Credit

Hudson/NIST

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