公开(公告)号：US20200073025A1

公开(公告)日：2020-03-05

申请号：US16556546

申请日：2019-08-30

Applicant: MITUTOYO CORPORATION

Inventor： Shiro IGASAKI ,  Nobuo OOBA ,  Masaki OKAYASU ,  Yuki KURAHASHI

IPC: G02B3/14 ,  G02B3/00

Abstract: A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a refractive power controller that controls refractive power of the lens system. The refractive power controller adjusts the voltage of the drive signal in accordance with effective power that is supplied to the liquid lens apparatus.

公开(公告)号：US20180180773A1

公开(公告)日：2018-06-28

申请号：US15854226

申请日：2017-12-26

Applicant: MITUTOYO CORPORATION

Inventor： Atsushi USAMI ,  Masaki OKAYASU

IPC: G02B3/14 ,  G02B26/00

Abstract: A lens system includes a tubular vibrating member that vibrates due to an input drive signal; a case accommodating the vibrating member; a fluid that fills the case and immerses the vibrating member; and a pressure mitigating member that is installed in a gap between the vibrating member and the case, further outward than the vibrating member. A foam body made of fluororubber and having a large number of closed cells is used as the pressure mitigating member.

公开(公告)号：US20190121056A1

公开(公告)日：2019-04-25

申请号：US16161835

申请日：2018-10-16

Applicant: MITUTOYO CORPORATION

Inventor： Tatsuya NAGAHAMA ,  Koji KUBO ,  Yuko SHISHIDO ,  Masaki OKAYASU ,  Atsushi USAMI

IPC: G02B7/10 ,  G02B9/04 ,  H04N5/225

Abstract: A variable focal length lens apparatus includes an objective lens and an imaging lens that are aligned on the same optical axis; a front side lens system and a rear side lens system that are disposed in a section between the objective lens and the imaging lens on the optical axis, and change a refractive index in accordance with an input drive signal; and a diaphragm disposed in the section between the front side lens system and the rear side lens system on the optical axis.