Camera provided with a device for generating a signal representa

Details Camera provided with a device for generating a signal representa Camera provided with a device for generating a signal representa

1982-07-30

1984-09-18

Perkey, William B.

354483, G03B 7099

Patent

active

044720432

ABSTRACT:
An electromagnetically driven diaphragm shutter having the shutter blade serving at the same time as the diaphragm, uses a quasi-TTL actual aperture light measuring system for measuring the incident light by providing the light measuring element at the auxiliary opening (auxiliary aperture) whose opening amount varies in proportion to that of the principal opening. The auxiliary opening is variable with the opening of the shutter blades. Structure is provided for generating and holding a signal representative of the finished state of an exposure, which is adapted to detect the output variation of the light measuring element at the auxiliary aperture when the shutter is closed and then to supply certainly the signal to enable subsequent action such as start of motorized film winding.

REFERENCES:
patent: 4009866 (1977-03-01), Iwata et al.
patent: 4258990 (1981-03-01), Arisaka et al.

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