Patent · US Expired

Purple membrane preparations having increased holographic diffraction efficiency

US5374492A · kind A · utility

8Cited by

3References

5Claims

0Family size

Assignee

Consortium für elektrochemische Industrie GmbH · DE

Inventors

Norbert Hampp · Hersbruck, DE
Andreas Popp · Ludwigshafen, DE
Alfred Miller · Martinsried, DE
Christoph Brauchle · Hersbruck, DE
Dieter Oesterhelt · Munich, DE

Key dates

Filing date	Sep 11, 1992
Grant date	Dec 20, 1994
Priority date	—
Expiry date	Sep 11, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG03H2260/54
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Purple membrane preparations having an increased holographic diffraction efficiency. The purple membrane preparations have a diffraction efficiency of less than 5 seconds and a resolution of greater than 1,500 lines/mm. The purple membrane preparations are obtainable by adjusting a purple membrane suspension having a photocycle time of at least 10 ms to a pH of between 6 and 11 by means of a buffer, adding from 1% to 10% by weight of a proton donor to this purple membrane suspension, and drying the resultant suspension down to a water content of from 1% to 30% by weight.

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