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Patent Searching and Data


Title:
OPTICAL MODULE
Document Type and Number:
WIPO Patent Application WO/2019/189140
Kind Code:
A3
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.

Inventors:
YOSHIDA KENJI (JP)
Application Number:
PCT/JP2019/012798
Publication Date:
November 14, 2019
Filing Date:
March 26, 2019
Export Citation:
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Assignee:
I P SOLUTIONS LTD (JP)
International Classes:
G06F3/03; G02B7/02; G03B15/02; G03B15/05; G06F3/042; G06K7/10; H04N5/225; H04N5/238
Foreign References:
JPH0773266A1995-03-17
JPH0620079A1994-01-28
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