Title:
EXPOSURE CONTROLLER
Document Type and Number:
Japanese Patent JP3192043
Kind Code:
B2
Abstract:
PURPOSE: To provide an inexpensive exposure controller capable of respectively and independently controlling exposure time and the size of an aperture.
CONSTITUTION: This controller is provided with shutter blades 2a and 2b capable of changing the size of the aperture transmitting an exposing luminous flux in accordance with moving amount in the case of opening and closing, a solenoid plunger 13 provided with a movable iron core 13a driving the shutter blades 2a and 2b, a lever 9 controlling the moving of the movable iron core 13a of the solenoid plunger 13, a tension spring 10 pressing the lever 9 in the direction where the moving of the movable iron core 13a is controlled, and a controlling circuit 14 setting a voltage driving the solenoid plunger 13; when a low voltage is set by the controlling circuit 14, the moving of the movable iron core 13a is controlled by the lever 9, and when a high voltage is set, the movable iron core 13a releases control by means of the lever 9 against the pressing force of the tension spring 10 and is moved.
Inventors:
Hiroaki Miyazaki
Application Number:
JP30551893A
Publication Date:
July 23, 2001
Filing Date:
December 06, 1993
Export Citation:
Assignee:
Olympus Optical Co., Ltd.
International Classes:
G03B9/10; (IPC1-7): G03B9/10
Domestic Patent References:
| JP2244131A | ||||
| JP4137332U |
Attorney, Agent or Firm:
Susumu Ito