Angled optical fiber filter for reducing artifacts in imaging ap

Details Angled optical fiber filter for reducing artifacts in imaging ap Angled optical fiber filter for reducing artifacts in imaging ap

1993-03-31

1994-06-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

25022728, 385120, G02B 608

Patent

active

053212517

ABSTRACT:
An optical fiber array is used as a blur filter in imaging apparatus to limit high spatial frequencies incident upon an image sensor, and thereby to reduce undersampling artifacts. The optical fiber array includes optical fibers disposed in the path of incident image light at an angle to the optical axis of the sensor such that the optical fibers composing the array emit an annular pattern of light over adjacent photosites, thereby producing a blurred image. The annular pattern of light has a mean radius that remains substantially the same regardless of changes in the optical aperture of the imaging path, with only the thickness of the annular pattern changing with aperture.

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