Title:
レンズユニット及びその製造方法
Document Type and Number:
Japanese Patent JP7245087
Kind Code:
B2
Abstract:
A protrusion part which protrudes locally from the periphery of a fifth lens body toward an image side may be provided on an image side of the fifth lens body. On an object side of a cemented lens, a cemented lens upper surface abutting against the protrusion part on the outside of a lens surface may be provided. The protrusion part may be formed in number at equal intervals in the circumferential direction, and the protrusion parts may be divided into seven protrusion part groups each including three protrusion parts in accordance with the protrusion amount to the image side. The protrusion part which actually abuts against the cemented lens upper surface may be selected from among the protrusion parts in accordance with the thickness of a fifth lens as actually measured, so that the interval between the fifth lens and the cemented lens may be of an appropriate value.
Inventors:
Toshio Shiratori
Yosuke Kanzaki
Tadashi Komiyama
Yosuke Kanzaki
Tadashi Komiyama
Application Number:
JP2019052252A
Publication Date:
March 23, 2023
Filing Date:
March 20, 2019
Export Citation:
Assignee:
Nidec Sankyo Co., Ltd.
International Classes:
G03B11/00; G02B7/02; G03B30/00
Domestic Patent References:
| JP2019008201A | ||||
| JP2018054922A | ||||
| JP2015118155A | ||||
| JP2005333170A | ||||
| JP2002277738A | ||||
| JP2007163657A | ||||
| JP2007079155A |
Foreign References:
| US20180088297 | ||||
| CN107884901A |
Attorney, Agent or Firm:
Jo Hori
Yukihiko Maejima
Murakami Daiyu
Yukihiko Maejima
Murakami Daiyu