Distance measuring device for automatic focusing camera

Details Distance measuring device for automatic focusing camera Distance measuring device for automatic focusing camera

1989-05-04

1990-05-01

Adams, Russell E.

354408, 3541951, G03B 300

Patent

active

049222813

ABSTRACT:
A distance measuring device of a triangulation system type for an automatic focusing camera having a photographing optical system. The device comprises a distance measuring unit for measuring a distance to an object to be focused through the photographing optical system. The unit is comprised of a pair of image detecting elements each for detecting an image of the object, and a pair of distance-measuring optical systems each for imaging the object onto one of the image detecting elements. A drive mechanism is provided for pivotally moving the distance-measuring optical systems and the image detecting elements of the unit integrally in a plane parallel to each of optical axes of distance-measuring optical systems, without causing any relative movement of the distance-measuring optical systems and the image detecting elements with respect to each other. A control mechanism is provided for controlling the drive mechanism so as to stop pivotal movement of the unit at each of at least two or more different pivotal angular positions thereof to thereby enable measurement of distance to each of at least two or more different points appearing in the field of view of the camera.

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patent: 4694149 (1987-09-01), Toyama et al.
patent: 4740806 (1988-04-01), Takehana

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