Optical color sensor and color print inspecting apparatus

Details Optical color sensor and color print inspecting apparatus Optical color sensor and color print inspecting apparatus

1998-11-20

2000-09-05

Grant, II, Jerome

Image analysis

Image sensing

358505, 358512, 358514, H04N 146, G06K 700

Patent

active

061155128

ABSTRACT:
There is disclosed an optical color sensor comprising a light source which comprises white LEDs for directing a white light onto a product to be inspected, to directly illuminate the product and generate a reflected light reflected from the product. The optical color sensor further comprises first photo detecting element means spaced from the product. A blue filter is interposed between the first photo detecting element means and the product so that the first photo detecting element means can receive and detect the reflected light passing through the blue filter. The optical color sensor further comprises second photo detecting element means spaced from the product. A red filter is interposed between the second photo detecting element means and the product so that the second photo detecting element means can receive and detect the reflected light passing through the red filter. The first and second photo detecting element means are arranged to receive and detect the reflected light reflected from the product at substantially the same position in a region onto which the white LEDs direct the white light.

REFERENCES:
patent: 4812900 (1989-03-01), Kadowaki
patent: 5075770 (1991-12-01), Smyth
patent: 5426290 (1995-06-01), Kawamoto
patent: 5642197 (1997-06-01), Tuhro
patent: 5694227 (1997-12-01), Starkweather
patent: 5748828 (1998-05-01), Steiner
patent: 5777669 (1998-07-01), Uwatoko

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