Focus spot size controller for a variable depth range camera

Details Focus spot size controller for a variable depth range camera Focus spot size controller for a variable depth range camera

1990-07-02

1991-10-29

Wallace, Linda J.

Optics: measuring and testing

Range or remote distance finding

With photodetection

359379, G01C 300

Patent

active

050610627

ABSTRACT:
A focus spot size controller for a variable depth triangulation ranging system, the ranging system including apparatus for emitting light beam to be focused onto an object, light sensitive apparatus, lens apparatus for imaging reflected light onto said light sensitive apparatus, and apparatus for calculating system geometry and range from signals received from the light sensitive apparatus. The present invention includes a focus spot size controller for receiving the light beam from the light beam emitting apparatus and for focusing the light beam into a focused spot on an object, the controller positioning the focused spot axially to achieve sufficient focus spot size for imaging.

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SPSE Handbook of Photographic Science and Engineering, ed. W. Thomas, Jr., 1973, John Wiley & Sons, pp. 181-185.
Bocchi et al., Sensor Perfromance in Long Range 3D Triangulation Systems (authors identified as being at CyberOptics Corporation, Minneapolis, Minn.).

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