Filter changing mechanism for a video camera

Details Filter changing mechanism for a video camera Filter changing mechanism for a video camera

1990-05-11

1991-12-03

Lobo, Ian J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

359889, G02B 1316, H04N 5225

Patent

active

050704079

ABSTRACT:
In a video camera using a silicon diode tube or a similar acting light sensitive solid state pickup element as a light image sensing device, a light control device which detects light in the visual spectrum and upon receipt of visual spectrum light operates a mechanical switching device which positions a Cut I-R filter in front of the image sensing device for visual light illuminated objects and positions a optical or neutral density filter in front of the image sensing device in the absences of any visual light for detection of infra-red light illuminated objects. Different filters can be substituted for other illuminating light frequencies.

REFERENCES:
patent: 3377427 (1968-04-01), Fischer
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patent: 4113359 (1978-09-01), Koike et al.
patent: 4316659 (1982-02-01), Daniels
patent: 4727413 (1988-02-01), Miura et al.
patent: 4805028 (1989-02-01), Nishioke et al.
patent: 4827348 (1989-05-01), Ernest et al.
patent: 4870496 (1989-09-01), Fantone

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