Title:
CEMENTED LENS AND LENS UNIT
Document Type and Number:
WIPO Patent Application WO/2014/097980
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a cemented lens and a lens unit equipped with the cemented lens capable of preventing an air bubble from entering between lenses, the creation of gaps, or separation and eccentricity between lenses, and the leakage of adhesive to outside the lens. A projection (253) projecting toward the outer peripheral region (241) of a first lens and coming in contact with the outer peripheral region (241) is formed at the outer peripheral region (251) of a second lens in a cemented lens (10), and thus allows highly accurate control of the distance between the lens surface (240) of a first lens (24) and the lens surface (250) of a second lens (25). An annular recess (243) formed in the outer peripheral region (241) of the first lens extends circumferentially to surround the lens surface (240), and thus surplus adhesive (40) collects in the recess (243).
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Inventors:
HASHIMOTO YOSHIYUKI (JP)
HORIUTI KOHEI (JP)
HORIUTI KOHEI (JP)
Application Number:
PCT/JP2013/083440
Publication Date:
June 26, 2014
Filing Date:
December 13, 2013
Export Citation:
Assignee:
NIDEC SANKYO CORP (JP)
International Classes:
G02B7/02; G02B1/04; G02B3/00
Foreign References:
| JP2011008125A | 2011-01-13 | |||
| JP2012083439A | 2012-04-26 | |||
| JP2002131509A | 2002-05-09 | |||
| JP2012159726A | 2012-08-23 | |||
| JP2008216891A | 2008-09-18 | |||
| JP2009063877A | 2009-03-26 |
Other References:
See also references of EP 2937724A4
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