Multiple mode exposure control system with gray code aperture se

Details Multiple mode exposure control system with gray code aperture se Multiple mode exposure control system with gray code aperture se

1978-09-05

1980-04-08

Gellner, Michael L.

354 27, 354 29, 354149, G03B 708

Patent

active

041969871

ABSTRACT:
An exposure control system being selectively operable in a plurality of ambient and flash illumination modes of operation. The operator may program the system for a selected one of the modes by setting a corresponding programming combination of two mode selecting switches, one of which is preferably rendered conductive in response to operatively coupling a flash source to a receiving socket thereby indicating the selection of flash mode operation. The system features a pair of shutter/aperture blades adapted to be driven stepwise by a stepper motor and an aperture selecting system that provides a Gray coded binary number indicating the number of steps the blades are to be driven for a particular exposure. In the flash modes, the Gray coded number is provided in response to lens focusing to provide a Gray coded number corresponding to a scene distance related range of exposure aperture values. In at least one of the ambient light modes the aperture selecting system is configured to be set manually by the operator to provide an aperture indicating Gray coded number that is selected independently of lens focus distance.

REFERENCES:
patent: 3526181 (1970-09-01), Fahlenberg et al.
patent: 3570381 (1971-03-01), Satoo
patent: 3709137 (1973-01-01), Starp
patent: 3928858 (1975-12-01), Sakurada et al.
patent: 3945025 (1976-03-01), Stempeck
patent: 3950776 (1976-04-01), Erlichman et al.
patent: 3969735 (1976-07-01), Nobusawa
patent: 3977012 (1976-08-01), Erlichman
patent: 4016574 (1977-04-01), Iwata et al.
patent: 4023187 (1977-05-01), Shenk
patent: 4058816 (1977-11-01), Nobusawa
patent: 4065776 (1977-12-01), Iwata et al.
U.S. Appl'n. S.N. 898,546, filed Apr. 21, 1976 by Conrad Biber et al.
U.S. Appl'n. S.N. 930,029 filed Aug. 1, 1978 by Irving Erlichman.
U.S. Appl'n. S.N. 899,785 filed Apr. 25, 1978 by Edwin Shenk.

Affiliated with

Also associated with

Rating

Multiple mode exposure control system with gray code aperture se does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple mode exposure control system with gray code aperture se, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple mode exposure control system with gray code aperture se will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-971016