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The device and method for measuring the deformations of the wave surface introduced by an optical system
The device and method for measuring the deformations of the wave surface introduced by an optical system
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机译:测量光学系统引入的波面变形的装置和方法
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摘要
Coherent light from a source (2) is divided by a separator cube (6) into a reference beam (8) and a measuring beam (10) which is reflected by a mirror (14). The two beams intersect in a Bragg cell (12) which is excited by a RF generator (16). The reference and diffracted measuring beams are directed by a lens (20) to the optical system (18) under test. Sinusoidal interference fringes formed at a slit (22) are translated at a uniform rate and detected by e.g. a photomultiplier (24). Wavefront distortion introduced by the optical system (18) is indicated by the phase of the photomultiplier output, which is compared (26) with the phase of the RF generator (16).
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