Title:
CAMERA WITH SHUTTER MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3456538
Kind Code:
B2
Abstract:
PURPOSE: To find a trouble without developing a film by providing an operation state detecting means on a shutter means.
CONSTITUTION: A shutter blind travel detecting device constituted of a light emitting diode (LED) 18 and a photo-transistor(PTR) 19 is provided in a shutter 8. If the first blind 16 or the second blind 15 exists, the light from the LED 18 is reflected by it then fed into the PTR 19. If both the blinds 15, 16 do not exist, no incidence light is fed into the PTR 19. The static existence and the dynamic timing relation of the blinds 15, 16 can be detected by the above distinction. The shutter blind travel detecting device is provided at the outside of a photographing circuit to the opening section of an aperture 6 to prevent a film from being exposed by the light emitted from the LED 18 and prevent the LED 18 and the PTR 19 from shielding the object light via a lens 2, and the state is detected by blade tips of the first blind 16 and the second blind 15 on the outside of the aperture 6.
Inventors:
Tetsuro Goto
Masanori Hasuda
Akira Katayama
Masanori Hasuda
Akira Katayama
Application Number:
JP223193A
Publication Date:
October 14, 2003
Filing Date:
January 11, 1993
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G03B9/36; G03B7/10; G03B9/18; G03B17/18; G03B43/02; (IPC1-7): G03B9/36
Domestic Patent References:
| JP6336221A | ||||
| JP4276727A | ||||
| JP1289924A | ||||
| JP5196995A |