Projector system and system for detecting flaw

Details Projector system and system for detecting flaw Projector system and system for detecting flaw

1990-05-22

1992-05-19

Arnold, Bruce Y.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

359619, 385116, 356237, 356241, G02B 304, G02B 606, G01N 2100

Patent

active

051153491

ABSTRACT:
A projector system includes an optical converter element of a cylindrical shape, and a light beam-generating device for generating a plurality of light beams. Optical axes of the plurality of light beams are spaced from one another in a direction of the circumference of the optical converter element and intersecting one another substantially at one point lying on the axis of the optical converter element. The optical axes of the plurality of light beams are inclined at the same angle with respect to the axis of the optical converter element, so that when the plurality of light beams are incident on the optical converter element, an outgoing light beam is emitted from the optical converter element in such a manner that the outgoing light beam extends along an imaginary conical surface coaxial with the optical converter element. This outgoing light beam can be converted by a collimator lens into a light beam extending along an imaginary cylindrical surface. The light beam extending along the imaginary conical surface or the imaginary cylindrical surface is applied to an annular portion of an object to be detected, so that part of this light beam leaking through a flaw in the annular portion is detected by a photosensor.

REFERENCES:
patent: 3964824 (1976-06-01), Dixon
patent: 4184748 (1980-01-01), Kugler et al.
patent: 4427265 (1984-01-01), Suzuki et al.
patent: 4521087 (1985-06-01), Hayes
patent: 4623776 (1986-11-01), Buchroeder et al.
patent: 4793694 (1988-12-01), Liu
patent: 4826269 (1989-05-01), Streifer et al.

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