Method for adjusting a position of a solid-state image detector

Details Method for adjusting a position of a solid-state image detector Method for adjusting a position of a solid-state image detector

1996-03-13

1998-09-08

Garber, Wendy

Television

Camera, system and detail

Optics

348188, H04N 5232

Patent

active

058052186

ABSTRACT:
A three-dimensional resolution chart is used to adjust the position of a solid-state image detector 4 in a given image-forming optical system. A plurality of blocks 10a are provided on an upper surface of a resolution chart 10. Each block 10a has an adjusting pattern A-D depicted on a slant surface thereof. An image of each adjusting pattern A-D is formed-on the solid-state image detector 4 through a master lens 2. The contrast integration value F is calculated based on the image of the adjusting pattern at each of a plurality of designated areas hj (j=1 - - - n) on the slant surface of each block 10a provided on the resolution chart 10, to find out a specific position on each block where the contrast integration value F becomes maximum, thereby identifying the specific position as focus point of the master lens 2. The back focus of the solid-state image detector 4 is calculated based on thus obtained focus point. An optimum gradient (.alpha., .beta.) of the solid-state image detector 4 is calculated based on three-dimensional relationship between plural focus points of the master lens 2 detected on the plural blocks 10a. Finally, each positioning mechanism 11 adjusts each solid-state image detector 4 to the calculated optimum position or at the optimum gradient.

REFERENCES:
patent: 4513319 (1985-04-01), Breimer et al.
patent: 4761685 (1988-08-01), Asaida et al.
patent: 5140418 (1992-08-01), Rivamonte
patent: 5444481 (1995-08-01), Ohshima et al.

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