Riken Corporation

The Nexsys Corporation

Toyota Jidosha Kabushiki Kaisha

Nihon Parkerizing Co., Ltd.

Yoshihiro Uehara

Shinya Morita

Hitoshi Ohmori

Kazutoshi Katahira

Yutaka Yamagata

Yutaka Watanabe

Masahiro Nakamura

Norihide Mitsuishi

Weimin Lin

Muneaki Asami

Souichi Ishikawa

Hitoshi Omori

Yoshiyuki Ueno

Takahisa Sudou

Yuya Hasebe

Yoshisuke Mimata

Toshihisa Kataoka

There is here disclosed a nozzle type ELID grinding apparatus comprising a conductive grindstonehaving a contact surface with a workpieceand an ion supply nozzlethat supplies an electrolytic mediumcontaining hydroxyl ions (OH) onto a surface of the conductive grindstone, the workpiece being ground while the surface of the grindstone is dressed by electrolysis or chemical reaction. Furthermore, the apparatus comprises a grindstone power sourcefor setting the conductive grindstone to be a positive potential (+).

Method and apparatus for nozzle type ELID grinding

There is disclosed a micro surface shape measurement probe including a probe shafthaving at a distant end thereof a probe memberfor contacting an objectto be measured, a probe bodyprovided with support means for movably supporting the probe shaftin a non-contact manner, a pressing device for pressing and moving the probe shafttoward the objectto be measured, a piezoelectric sensorincorporated in the probe bodyso that a reactive force acts to a pressing force applied to the probe shaft by the pressing device, a load detecting deviceto measure a load acting on the piezoelectric sensor, a control devicefor adjusting the pressing force applied by the pressing device based on the load detected by the load detecting device, and a displacement amount measuring device for measuring a position of the probe memberin contact with the objectto be measured by the pressing force adjusted by the control device

Micro force measurement device, micro force measurement method, and micro surface shape measurement probe

A method of manufacturing a large double-sided curved Fresnel lens. The method includes a machining step (A) of performing ultra-precise three-dimensional machining on an upper mold and a lower mold to each have an upper transfer surface and a lower transfer surface engaging an upper surface and a lower surface of a thermoplastic resin plate, respectively. Further, the method includes a hot press molding step (B) of pressing the thermoplastic resin plate between the upper and lower molds by a predetermined pressure with the resin plate being held at a temperature higher than a softening temperature thereof and lower than a melting temperature thereof so that the thermoplastic resin plate is curved, and both lens surfaces for the double-sided Fresnel lens are respectively transferred to an upper surface and a lower surface of the thermoplastic resin plate.

Method and apparatus for manufacturing large double-sided curved Fresnel lens

Growing community of inventors

Wako, Japan

Yoshihiro Uehara