Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1975-01-30
1976-08-10
Stolwein, Walter
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
307117, 250214R, H01J 3912
Patent
active
039743756
ABSTRACT:
A device for measuring the irradiation energy impinged upon a target within a fixed period, having a photo-electric receiver impacted by irradiation. Such devices have become known by the designation "Lux hour meter". They are used, e.g. for tests, by which the influence of irradiation energy on the properties of materials, e.g. textiles, shall be determined.
REFERENCES:
patent: 3600584 (1971-08-01), Schneble
patent: 3626825 (1971-12-01), Years
patent: 3649128 (1972-03-01), Rothschild et al.
patent: 3703130 (1972-11-01), Watanabe
patent: 3727526 (1973-04-01), Hinds
patent: 3790789 (1974-02-01), Takahashi et al.
Original Hanau Quarzlampen GmbH
Stolwein Walter
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