Luminous flux measuring device with a gain-controlling slave cir

Details Luminous flux measuring device with a gain-controlling slave cir Luminous flux measuring device with a gain-controlling slave cir

1996-07-15

1998-03-10

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AG, 250214VT, 313532, H01J 4014, H01J 3912

Patent

active

057264384

ABSTRACT:
A luminous flux measuring device has a gain slaving circuit (10, 9), that receives an electrical output signal (m) produced by a photoreceiver (1) and includes a gain control circuit (9) and a comparator (10). The gain slaving circuit is connected to an A/D converter and a computer to record and evaluate the signal (m) and has a slave memory containing characteristic values (a,b) of a continuous function (f). The gain slaving circuit produces a slave signal (HT) according to the flux received (.PHI.) by the photoreceiver which signal is sent to the gain control circuit so that G=f(m).

REFERENCES:
patent: 3487222 (1969-12-01), Martens
patent: 3600072 (1971-08-01), Skagerlund
patent: 3714441 (1973-01-01), Kreda
patent: 4105967 (1978-08-01), Macemon
patent: 4669877 (1987-06-01), Wittmer
patent: 4987298 (1991-01-01), Inagaki
Review of Scientific Instruments, vol. 51, No. 11, Nov. 1980, New York, NY, USA, pp. 1500-1503 H. Hayashi et al. `Dual-variable detection method providing a wider dynamic range to a photomultiplier`.

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