Vision system illumination calibration apparatus

Details Vision system illumination calibration apparatus Vision system illumination calibration apparatus

1989-09-01

1991-07-23

Teska, Kevin J.

Boots, shoes, and leggings

364516, 36457101, 364579, 364525, G06F 1546, G06F 1564

Patent

active

050349040

ABSTRACT:
The vision system illumination calibration apparatus uses a pair of lamps, located one on either side of a vision element to illuminate a set of machine-readable characters imprinted in bar code format on a label affixed to a calibration target plate. The required level of illumination is set by the use of a predetermined calibration target label. The vision system is positioned opposite this calibration target label and the illumination level is varied in sequential steps. Control software identifies a range of illumination levels in which the calibration target label is accurately read by the vision element and sets the level of illumination of the lamps in this range of values.

REFERENCES:
patent: 3517167 (1970-06-01), Bell
patent: 4669047 (1987-05-01), Chucta
patent: 4760609 (1988-07-01), Tamagari
patent: 4864511 (1989-09-01), Moy et al.
patent: 4887892 (1989-12-01), Bacus
patent: 4908777 (1990-03-01), Wolfe
patent: 4916293 (1990-04-01), Cartlidge et al.
patent: 4937690 (1990-06-01), Yamashita et al.
patent: 4944022 (1990-07-01), Yasujima et al.

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