FIELD: physics.
SUBSTANCE: foundation isolated from the follow accommodates piles to support guide rails secured thereon. Carriage with laser interferometre and reference bar code stick and that to be tested move in said guide rails. Said sticks are aligned and rigidly jointed by their heels together via unit of standard end long measures. Rotary mirror is set at an angle to the plane of scale of sticks arranged horizontally so that hairs of autocollimator are aligned with auto collimation image of Ap-90° prism. Said prism has mirror coat of its faces and its diagonal face rigidly secured to rotary mirror. Carriage travel amount is read off laser interferometre. To incline the level, tester is used. Mirror is rigidly fixed on stationary guide at 45° to bar code stick being tested. Laser tracker with reflector that may be arranged on bar code stick being tested make be used as laser interferometre.
EFFECT: higher accuracy.
1 dwg
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