Motohiko Otsuki

Lens having diaphragm structure at outer edge portion on incident side thereof and optical unit using same

Metal ring for optical element, method for fabrication of optical element having metal ring, and optical element having metal ring

Optical fiber fixing device for optically coupling optical fiber with optical communication module

Method for fabrication of optical element having metal ring

Optical fiber fixing device for coupling with optical communication module

IMAGING ELEMENT UNIT

Method for fabricating metal ring-fitted optical device, and metal ring-fitted optical device

Surface structure of metallic body

Optische Vorrichtung mit einem aufgesteckten Befestigungsmetallring An optical device with a mounted fastening metal ring

An optical device comprising a plugged fastening metal ring