Patent · US Expired

Infrared pick-up device comprising an infrared sensitive television pick-up tube

US4163602A · kind A · utility

3Cited by

1References

3Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Klaus Schutz · Kirkland, US
Holger Helber · Bremen, DE
Gerhard Lange · Berlin, DE

Key dates

Filing date	Feb 2, 1978
Grant date	Aug 7, 1979
Priority date	—
Expiry date	Feb 2, 1998

Classification

Technology area (CPC H)Electricity
CPC primaryH04N23/23
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Infrared pick-up device comprising an infrared sensitive television pick-up tube and a diaphragm, which is alternately in the open and closed state, the amplitude of the available video signal being proportional to the speed at which the temperature changes, an additional, uniform radiation being superimposed on the scene radiation which can be changed so by a signal processing stage connected to the pick-up tube that the quantity of the average scene radiation plus the superimposed additional radiation is substantially equal to the radiation coming from the diaphragm in the closed state and acting on the target plate of the pick-up tube.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.