Light measuring apparatus capable of measuring ambient light and

Details Light measuring apparatus capable of measuring ambient light and Light measuring apparatus capable of measuring ambient light and

1995-01-05

1996-12-31

Pham, Hoa Q.

Optics: measuring and testing

Photometers

Photoelectric

356215, 396157, 396201, G01J 146, G03B 1505

Patent

active

055899340

ABSTRACT:
A light measuring apparatus capable of measuring ambient light, flash light from a flash source directly connected to the light measuring apparatus and flash light from a flash source that is remote. A photoelectric sensor can convert the light into electrical signals when an operator starts a light measurement cycle. A flash light emission signal can be generated to a flash source. The computer circuit can process the light signals to determine the specific mode of operation of the light measuring process, and based upon that particular mode of operation to appropriately calculate measurement values.

REFERENCES:
patent: 4262997 (1981-04-01), Yuasa
patent: 4291979 (1981-09-01), Yuasa et al.
patent: 4637721 (1987-01-01), Naruse et al.
patent: 4655576 (1987-04-01), Yuasa et al.
patent: 4914468 (1990-04-01), Naruse et al.
patent: 4994845 (1991-02-01), Narusa et al.

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