Optical inspection system having an internal rangefinder

Details Optical inspection system having an internal rangefinder Optical inspection system having an internal rangefinder

2005-05-24

2005-05-24

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S201600, C250S559240

Reexamination Certificate

active

06897421

ABSTRACT:
An optical inspection system comprises an optical system for providing an image of an object being inspected. The optical system comprises a plurality of lenses arranged along a normal optical axis, one of the lenses including an objective lens. A collimated laser beam is directed to one edge portion of the objective lens toward the object to illuminate the object with a spot. A focus lens focuses the spot reflected from the object and transmitted through an opposite edge portion of said objective lens onto a linear detector, whereby the location of the spot on the linear detector provides the position of the object above or below a reference plane.

REFERENCES:
patent: 6091075 (2000-07-01), Shibata et al.

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