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1. (WO2018105577) LENS UNIT AND IMAGING DEVICE

Pub. No.:    WO/2018/105577    International Application No.:    PCT/JP2017/043552
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Wed Dec 06 00:59:59 CET 2017
IPC: G02B 7/02
G02B 5/00
G03B 11/00
H04N 5/225
Applicants: NIDEC SANKYO CORPORATION
日本電産サンキョー株式会社
Inventors: KOMIYAMA Tadashi
小宮山 忠史
Title: LENS UNIT AND IMAGING DEVICE
Abstract:
The purpose of the present invention is to provide a lens unit and an imaging device, the lens unit capable of suppressing reflection in a specific direction of light incident on the periphery of a lens surface of a cemented lens from an image side. In a first lens 61 and a second lens 62 that are used in a cemented lens 60 of a lens unit, in a boundary portion between lens surfaces 612, 621 and flange surfaces (a first flange surface 616 and a second flange surface 626), a protruding part 617 annularly formed in the first lens 61 is fitted in a recessed part 627 annularly formed in the second lens 62, and is joined to an inner surface of the recessed part 627 by an adhesive 65. Even when light is incident on the peripheries of the lens surfaces 612, 621 from an image side L2 when, at the peripheries of the lens surfaces 612, 621, the adhesive 65 breaks off and an air layer is present, the light is reflected so as to diffuse to the image side L2 in a portion where the protruding part 617 (recessed part 627) is formed.