Optical probe assembly for detecting the position of an object s

Details Optical probe assembly for detecting the position of an object s Optical probe assembly for detecting the position of an object s

1978-07-03

1980-06-24

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

351 6, 356124, 356127, 356377, G01C 308, G01B 900, A61B 310

Patent

active

042092523

ABSTRACT:
An optical probe assembly for detecting the position of an object surface, especially the position of a three-dimensional, curved surface such as a surface in a contact lens or the cornea of the eye, is disclosed herein. This assembly and its method of operation use a beam of light which is focused to a point and an arrangement for automatically causing this point to move or scan in a predetermined way relative to the object surface including reciprocally through the surface for causing light to be reflected back from the latter. During this scanning period, when the beam point is coincident with the object surface, the amount of light which is reflected back along the path of the incident beam is maximized and automatically detected. At the same time, the position of the beam point relative to a known reference is automatically monitored and in combination with the detected light is used for determining the position of the object surface relative to this reference.

REFERENCES:
patent: 3016464 (1962-01-01), Bailey
patent: 3567320 (1971-03-01), Chitayat
patent: 3589815 (1971-06-01), Hosterman
patent: 3847485 (1974-11-01), Zanoni
patent: 4007990 (1977-02-01), McDevitt, Jr. et al.

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