Optical measuring apparatus
AssigneeMinolta Co., Ltd.
InventorsTeruo Morimoto, Kazuhiko Naruse, Makoto Kamiya, Takashi Saika
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Abstract
An optical measuring apparatus used for measuring optical characteristics of a liquid crystal display panel (LCD panel) in a calibration thereof comprises a housing having a contacting portion directly contacting a surface of the LCD panel and disposed far from a region on the LCD panel to be measured. An optical system and a photosensor is provided in the housing with a predetermined positional relation, so that ambient illumination is shielded by the housing and stray rays emitted from the LCD panel and having exit angles larger than a predetermined maximum exit angle α are restricted by the optical system.
Claims20
An optical measuring apparatus for measuring an optical characteristic by receiving rays emitted from a region to be measured on a surface of the liquid crystal display panel comprising:
- a housing with a contact portion for contacting on the surface of the liquid crystal display panel at position distant from the region to be measured;
- and
- a photosensing unit provided on the housing and for receiving rays emitted from the region to be measured when the contact portion contacts the surface of the liquid crystal display panel.
An optical measuring apparatus for measuring an optical characteristic by receiving rays emitted from a region to be measured on a surface of the liquid crystal display panel comprising a first photosensing device and a second photosensing device respectively having substantially the same spectral sensitivity;
- wherein
- the first photosensing device and the second photosensing device are disposed at positions on a photosensing plane distant by a predetermined distance from the surface of the liquid crystal display panel, and symmetrical with respect to a normal line at the center of the region to be measured in a direction where the light distribution of the liquid crystal display panel varies.
An optical measuring system consisting of an optical measuring apparatus for measuring an optical characteristic by receiving rays emitted from a region of an object to be measured and a computer which can communicate data between the optical measuring apparatus, wherein
- the optical measuring apparatus comprises:
- a housing with a contact portion for contacting on the surface of the liquid crystal display panel at position distant from the region to be measured;
- a photosensing unit provided on the housing and for receiving rays emitted from the region to be measured when the contact portion;
- a processor for calculating a measurement value based on outputs obtained from the photosensing unit;
- and
- a transmitter for transmitting the calculated measurement value to the computer;
- and
- the computer comprising a receiver for receiving the measurement value transmitted from the transmitter.
Dependencies are inferred from the claim text.