公开(公告)号：US20170176736A1

公开(公告)日：2017-06-22

申请号：US14971127

申请日：2015-12-16

Applicant: Canon U.S.A., Inc.

Inventor： Akira Yamamoto ,  Minoru Tsuji

IPC: G02B23/24 ,  G02B7/02

CPC classification number: G02B23/2476 ,  G02B7/021 ,  G02B7/025 ,  G02B13/06 ,  G02B17/0808 ,  G02B17/0896 ,  G02B23/243 ,  G02B23/2469

Abstract: This disclosure an optical unit having a plurality of structural elements such as lens and a spacer having two or more opposing surfaces of the plurality of structural elements are bonded and secured to each other. A contact portion of the bonding portion is configured to prevent spreading of an adhesive and an adhesive reservoir is provided at the bonding portion. This disclosure further provides an apparatus having an imaging optical system configured to image a side surface in a tubular passage and an illuminating optical system that is arranged centrally within the imaging optical system.

公开(公告)号：US20180088312A1

公开(公告)日：2018-03-29

申请号：US15827878

申请日：2017-11-30

Applicant: Canon U.S.A., Inc.

Inventor： Minoru Tsuji

IPC: G02B23/24 ,  G02B7/02

CPC classification number: G02B23/2476 ,  G02B7/021 ,  G02B7/025 ,  G02B13/06 ,  G02B17/0808 ,  G02B17/0896 ,  G02B23/243 ,  G02B23/2469

Abstract: This disclosure an optical unit having a plurality of structural elements such as lens and a spacer having two or more opposing surfaces of the plurality of structural elements are bonded and secured to each other. A contact portion of the bonding portion is configured to prevent spreading of an adhesive and an adhesive reservoir is provided at the bonding portion. This disclosure further provides an apparatus having an imaging optical system configured to image a side surface in a tubular passage and an illuminating optical system that is arranged centrally within the imaging optical system.