Title:
CAMERA PROVIDED WITH SHUTTER MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3387138
Kind Code:
B2
Abstract:
PURPOSE: To evade erroneous photographing caused by the defective actuation of a shutter by comparing an actual exposure time and a control shutter time and preventing the shutter from being controlled by a time equal to or shorter than a shutter time thereafter when the shutter is not correctly controlled.
CONSTITUTION: An arithmetic means 101 obtaining the exposure time by which the shutter 8 should be controlled and a control means 102 controlling the shutter 8 by the obtained control exposure time are provided. Besides, a measuring means 105 measuring the actual exposure time obtained by the shutter 8 controlled to be driven by the control means 102, a judgement means 103 judging whether the actual exposure time is within the previously decided normal range of actuation or not and an inhibition means 104 inhibiting at least the driving of the shutter by the control exposure time when the actual exposure time is out of the normal range of the actuation are provided. Then, when the actual exposure time is judged to be out of the normal range of the actuation, the shutter is inhibited from being driven by the control exposure time at least at that time when the succeeding photographing is executed.
Inventors:
Tetsuro Goto
Akira Katayama
Masanori Hasuda
Akira Katayama
Masanori Hasuda
Application Number:
JP5263493A
Publication Date:
March 17, 2003
Filing Date:
March 12, 1993
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G03B7/093; G03B9/36; (IPC1-7): G03B9/36; G03B7/093
Domestic Patent References:
| JP56155938A | ||||
| JP3107133A | ||||
| JP5717938A | ||||
| JP5446037A | ||||
| JP1263626A | ||||
| JP4276727A | ||||
| JP56146130A | ||||
| JP61241740A | ||||
| JP1267530A | ||||
| JP431128U | ||||
| JP53102630U | ||||
| JP6113832U | ||||
| JP1162212U | ||||
| JP6212133U | ||||
| JP422720U |
Attorney, Agent or Firm:
Fuyuki Nagai