Title:
DEVICE FOR DETECTING POSITION OF LENS FOR CAMERA
Document Type and Number:
Japanese Patent JP3162756
Kind Code:
B2
Abstract:
PURPOSE: To eliminate the need of securing space for detecting the position of a lens and to miniaturize a camera.
CONSTITUTION: This device is provided with a differential coil guide 13a for guiding a lens, which is obtained by winding a differential coil consisting of a primary coil and a secondary coil which are wound reversely to each other in a lens moving direction, and a supporting sleeve 14 for supporting the lens, which is made of metal and arranged on the outer periphery of the guide 13a so as to freely slide, and a voltage value induced to the secondary coil from the primary coil when the sleeve 14 is moved is fetched to detect the position of the lens. Therefore, the space is saved by using the conventional guiding guide.
Inventors:
Koji Kaneko
Application Number:
JP28227791A
Publication Date:
May 08, 2001
Filing Date:
October 01, 1991
Export Citation:
Assignee:
Fuji Photo Optical Co., Ltd.
International Classes:
G01B7/00; G02B7/04; G02B7/08; G05D3/12; (IPC1-7): G02B7/08
Domestic Patent References:
| JP55823A |
Attorney, Agent or Firm:
Yasuhito Ogata