Patent · US Expired

Television pick-up system

US4161755A · kind A · utility

5Cited by

3References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joerg Haendle · Erlangen, DE
Heinz Horbaschek · Erlangen, DE
Hartmut Sklebitz · Erlangen, DE

Key dates

Filing date	Jan 19, 1978
Grant date	Jul 17, 1979
Priority date	—
Expiry date	Jan 19, 1998

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/32
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In television transmission of medical X-ray photographs and in television X-ray fluoroscopy (e.g. during surgery), where a great brightness contrast range is presented, the illustrated system obtains a blurred video signal representative of the brightness of relatively large regions of the visible light image and adjustably selects high amplitude parts of such signal to synchronously modulate the scanning electron beam of a storage type television camera tube. In this way darker image areas are transmitted with full contrast for reproduction of fine image details as particularly required in medical X-ray technology, while excessively bright areas are attenuated to a desired degree.

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