Color filter inspection apparatus

Details Color filter inspection apparatus Color filter inspection apparatus

2005-01-11

2005-01-11

Stafira, Michael P. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

Reexamination Certificate

active

06842240

ABSTRACT:
In a color filter inspection apparatus (1), an image pickup part (13) for performing an image pickup of a color filter (9) which travels along guide rails (23) from above with a line sensor (130) and a fluorescence lamp (14) for irradiating the color filter (9) with an illumination light from below are provided and an optical filter (131) which transmits a light in a predetermined wavelength band is attached to the image pickup part (13). A transmission wavelength band of the optical filter (131) is a wavelength band in which the transmittance of one color component filter of the color filter (9) is high and transmittances of other color component filters are low. It is thereby possible to inspect unevenness in color of the color filter (9) with respect to one color component filter with high precision.

REFERENCES:
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patent: 6221544 (2001-04-01), Hayashi et al.
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patent: 2000-337999 (2000-12-01), None
patent: 2001-141607 (2001-05-01), None

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