Camera shake detecting device

Details Camera shake detecting device Camera shake detecting device

1991-10-09

1992-11-24

Adams, Russell E.

354403, 354410, G03B 708

Patent

active

051667231

ABSTRACT:
A camera shake detecting device includes a filter circuit, a variable gain amplifier and a camera shake detection/warning circuit. The filter circuit inputs a receiving output corresponding to a field luminance from a light receiving unit of an active type distance measuring device when the distance measuring device is not conducting a distance measurement, and gives an output, of which higher frequency components than frequency components due to camera shake are attenuated, to the variable gain amplifier. The variable gain amplifier of the gain is controlled corresponding to a mean light volume level of the field so that an amplitude of frequency components due to camera shake is not affected by the field luminance. The camera shake detection/warning circuit inputs an output of the variable gain amplifier, and issues a camera shake warning when the amplitude of frequency components due to camera shake is detected at least while a shutter is opened.

REFERENCES:
patent: 4462671 (1984-07-01), Suzuki et al.
patent: 4780739 (1988-10-01), Kawakami et al.
patent: 4965619 (1990-10-01), Shikaumi et al.
patent: 4970540 (1990-11-01), Vasey et al.
patent: 5012270 (1991-04-01), Sekine et al.
patent: 5101230 (1992-03-01), Shikaumi et al.
patent: 5117246 (1992-05-01), Takahashi et al.

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