Mitutoyo Corporation

Masaki Okayasu

Tatsuya Nagahama

Shigeru Ohtani

Yoshiro Asano

Yu Sugai

Masanori Arai

Atsushi Usami

Isaiah Freerksen

Masafumi Yamanaka

Sadayuki Matsumiya

Koji Kubo

Kenji Okabe

Shiro Igasaki

Yuko Shishido

Yuki Kurahashi

Nobuo Ooba

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.

Variable focal length lens apparatus

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.

Variable focal length lens apparatus and control method

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.

Lens system and variable focal length lens apparatus

Variable focal length lens

Growing community of inventors

Tokyo, Japan

Masaki Okayasu