Patent · US Expired

Device for reducing the granulation in the transmission of optical information by means of a highly coherent beam of radiation

US3941456A · kind A · utility

52Cited by

2References

10Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Wolfram Schilz · Norderstedt, DE
Manfred Rahlff
Uwe Schmidt · Lambach, DE
Klaus Gottfried Plass
Eckhard Schroder · Eckental, DE

Key dates

Filing date	Mar 25, 1974
Grant date	Mar 2, 1976
Priority date	—
Expiry date	Mar 25, 1994

Classification

Technology area (CPC G)Physics
CPC primaryG03H1/32
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A device is described for reducing the granulation during the transmission of optical information with a highly coherent radiation beam. The device includes a first objective system, a radiation-diffusing element disposed in the image plane thereof, a second objective system and a radiation refracting element of a medium whose refractive property is variable under the influence of an ultrasonic wave.

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