Iris for video camera

Details Iris for video camera Iris for video camera

1991-06-21

1994-03-08

Mancuso, Joseph

Facsimile and static presentation processing

Facsimile

Recording apparatus

348335, 354228, 354230, 354246, 354270, 354274, 354275, 354296, 359739, H04N 5238, H04N 530

Patent

active

052935426

ABSTRACT:
A video camera in which an iris in an optical system is composed of a plurality of diaphragms, and at least two of the plurality of diaphragms are respectively provided with a light amount limiting filter such that the light amount limiting filters attached on the at least two diaphragms completely surround a transparent portion when the iris is half closed, to thereby provide satisfactory characteristics of the optical system when the iris is half closed.

REFERENCES:
patent: 2351932 (1944-06-01), Deckel et al.
patent: 2465578 (1949-03-01), Czarnikow et al.
patent: 3377427 (1968-04-01), Fischer
patent: 4047212 (1977-09-01), Yamada
patent: 4113359 (1978-09-01), Koike et al.
patent: 4298265 (1981-11-01), Tanaka et al.
patent: 4319821 (1982-03-01), Tezuka et al.

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