Optical focussing sensor

Details Optical focussing sensor Optical focussing sensor

G - Physics

02

B

340/136, 33/64,

G02B 27/40 (2006.01) G02B 7/34 (2006.01) G02B 27/16 (2006.01) G11B 7/09 (2006.01)

Patent

CA 1073253

Abstract of the Disclosure The invention relates to focussing sensors for measuring the deviation between the point of convergence of a beam of radiant energy and the surface of an object receiving this beam. According to the invention, a degree of asymmetry is first introduced into this beam, after which the image of this convergence point if formed on photoelectric sensors enabling the distortions of this image to be measured. These sensors supply signals which are dependent upon said deviation and enable it to be measured.

262090

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