Optics: measuring and testing – Photometers – Integrating
Patent
1984-02-14
1987-01-20
Willis, Davis L.
Optics: measuring and testing
Photometers
Integrating
356218, G01J 146
Patent
active
046377212
ABSTRACT:
An improved light measuring device that is capable of measuring light upon initialization from either a flash of light or a manual switch is provided. A sensor assembly can produce a light intensity signal and a change in the intensity of the light measured can be used to produce a first signal. A second signal can be produced by a manually operable member. A counter can be used to count the number of signals and to produce a preparing signal upon an initial signal counted and a start signal upon a subsequent signal counted. Measurement of the amount of light in the circuit can be initially enabled when the counting means counts the first signal and the actual light measurement can be started subsequently upon the counting means initiating a start signal. Various sequences of producing the pair of signals can be utilized to control the operation of the light measuring device.
REFERENCES:
patent: 4203668 (1980-05-01), Chapman
patent: 4227808 (1980-10-01), Yuasa
Naruse Kazuhiko
Yuasa Yoshio
Minolta Camera Kabushiki Kaisha
Willis Davis L.
LandOfFree
Light measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light measuring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2132417