Image pickup head for image pickup device

Details Image pickup head for image pickup device Image pickup head for image pickup device

1990-02-02

1991-01-29

Ullah, Akm

G02B 632

Patent

active

049881582

ABSTRACT:
An image pickup head for an image pickup device capable of permitting the observed section at a subject to be illuminated with a uniform lumination while preventing the reflection of light at the observed section from adversely affecting an image of the observed section. A first polarizing element having a predetermined polarization plane is arranged in the optical path of light projected from the projection end of a light guide onto a subject, while a second polarizing element having a predetermined polarization plane is arranged in the optical path of light reflected at the subject and guided to an image pickup element. The polarization planes of the first and second polarizing elements are varied relative to each other to provide an image either including or free of light reflected at the surface of the subject.

REFERENCES:
patent: 3600067 (1971-08-01), Heine
patent: 4763993 (1988-08-01), Vogeley et al.
patent: 4930851 (1990-06-01), Yamamoto

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