Optical imaging system

The utility model relates to an optical imaging system which is particularly used for recognition of carved characters on a cured surface object with a complicated background. The optical imaging system comprises an imaging unit, a lighting unit and an optical filter; light emitted by the lighting u...

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Bibliographic Details
Main Authors TIANG-HO BEY, YOLANDA YAO, TAKESHI TAKAMORI
Format Patent
LanguageChinese
English
Published 10.12.2014
Subjects
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
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Summary:The utility model relates to an optical imaging system which is particularly used for recognition of carved characters on a cured surface object with a complicated background. The optical imaging system comprises an imaging unit, a lighting unit and an optical filter; light emitted by the lighting unit at least comprises a part of wave which is the same in wavelength as the optical filter and 350-550 nm in length; the imaging unit and the lighting unit are arranged at the two sides of a place above the cured surface object in a deflection manner; a first angle is formed between the imaging unit and the vertical direction to ensure that sufficient parallel rays emitted by the lighting unit can reach to every part of the cured surface object and are free of blocking, and reflection rays of the background of the object can enter the imaging unit, so that high contrast between the background of the object and the carved characters can be realized. Through the adoption of the optical imaging system, influences of
Bibliography:Application Number: CN20142279499U