Electronic still camera

Details Electronic still camera Electronic still camera

1989-09-13

1992-03-24

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358225, 3592711, H04N 5238, H04N 5225

Patent

active

050993348

ABSTRACT:
An electronic still camera has a mechanical diaphragm mechanism for controlling the exposure of an image surface. The diaphragm mechanism includes an exposure plate having an opening of an aperture greater than an effective aperture corresponding to an open f-stop value, and at least one opening equal to an effective aperature corresponding to an f-stop value. By shifting the diaphragm plate, it is possible to set at least two types of f-stop values which include the open f-stop value. As a result, a diaphragm function in which effective aperture is made less than 1 mm can be achieved with a high degree of accuracy.

REFERENCES:
patent: 2249972 (1944-11-01), Aiken
patent: 2963951 (1955-04-01), Wareham
patent: 4301476 (1981-11-01), Keller et al.
patent: 4571629 (1986-02-01), Hario et al.
patent: 4626094 (1986-12-01), Saito

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