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Title:
OPTICAL MODULE
Document Type and Number:
WIPO Patent Application WO/2019/189140
Kind Code:
A2
Abstract:
Provided is an optical module for a code reading device, the module having a superior code recognition rate to the prior art. Specifically provided is an optical module for capturing an image of a subject surface, wherein: the optical module is equipped with a light guide tube having an opening that opens toward the subject surface, a light irradiating means for irradiating the subject surface with light from the opening via the light guide tube, a diaphragm member forming an aperture that transmits reflected light reflecting from the subject surface into the light guide tube, and a sensor for receiving the reflected light transmitted through the aperture formed by the diaphragm member; the sensor is provided further than the diaphragm member when viewed from the opening; the diaphragm member is provided further than the light irradiating means when viewed from the opening; and the inner surface of the light guide tube comprises a reflective material that reflects rather than transmits light.

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Inventors:
YOSHIDA, Kenji (9-14-2302, Koishikawa 1-chome Bunkyo-k, Tokyo 02, 〒1120002, JP)
Application Number:
JP2019/012798
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
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Assignee:
I.P SOLUTIONS, LTD. (1-44-2 Kandajimbocho, Chiyoda-ku Tokyo, 51, 〒1010051, JP)
International Classes:
G06F3/03; G02B7/02; G03B15/02; G03B15/05; G06F3/042; G06K7/10; H04N5/225; H04N5/238
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