Olympus Corporation

Masaru Ikemachi

Kanato Adachi

Hiroyuki Minakata

Tomoaki Sato

Kazutoshi Shiratori

The invention relates to a zoom optical system that makes it possible to offer a sensible tradeoff between cost savings and size reductions and an electronic system that incorporates it. The zoom optical system comprises a lens group having negative refracting power and a lens group having positive refracting power. At least one lens is formed by molding of a first lens blank () that provides a surface including at least an optical function surface after molding, and a second lens blank () that provides a surface other than said surface including at least an optical function surface after molding, wherein the first lens blank () and the second lens blank () are integrated into a one-piece lens ().

Zoom optical system and electronic system incorporating IT

Zoom optical system and electronic system incorporating it

All members of a lens-implement are arranged in a rectangular space of a main lens frame. A lens prism is fixed, three movable lens frames for zoom and focusing inserted the two guide shafts are arranged, and a image capturing lens is fixed top-to-bottom seriatim occupying the horizontal &#x2154; portion of the rectangular space, and the image capturing device is arranged at foot portion. A zoom motor is arranged at the back of the lens prism, and a zoom shaft cam, a diaphragm/shutter, a focusing ultrasonic linear motor, and a magnetic sensor are arranged along the lens frames.

Encoder, lens-implement and digital camera

Variable-power optical system and electronic device using same

Growing community of inventors

Akishima, Japan

Masaru Ikemachi