Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1981-11-18
1984-08-21
Arnold, Bruce Y.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356138, G03H 102, G01B 1127
Patent
active
044666934
ABSTRACT:
A holographic straightness meter comprising an optical element and a hologram disposed on a moving member and one pair of reflection elements disposed on a fixed member. The object beam and reference beam from the optical element are reflected by the reflection elements so as to impinge upon the hologram and form interference fringes on the screen placed behind the hologram. The number, interval, and inclination of these interference fringes vary with the amount of lateral displacement of the moving member. Thus by analyzing the interference fringes for such factors, the amount of the lateral displacement of the moving member can be determined.
REFERENCES:
Stroke, G. W., "An Alignment Interferometer for Precision Straightness-Measurements and Control Even of Rapidly Moving Carriages", JOSA, vol. 51, No. 12, Dec. 1961, pp. 1340, 1341.
Kohno Tsuguo
Matsuda Kiyofumi
Tenjinbayashi Koji
Agency of Industrial Science and Technology
Arnold Bruce Y.
Kelman Kurt
Ministry of International Trade and Industry
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