OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 11 — Apr. 10, 1992
  • pp: 1834–1841

Biological photochrome bacteriorhodopsin and its genetic variant Asp96 → Asn as media for optical pattern recognition

Norbert Hampp, Ralph Thoma, Dieter Oesterhelt, and Christoph Bräuchle  »View Author Affiliations


Applied Optics, Vol. 31, Issue 11, pp. 1834-1841 (1992)
http://dx.doi.org/10.1364/AO.31.001834


View Full Text Article

Enhanced HTML    Acrobat PDF (1036 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The biological photochrome bacteriorhodopsin (BR) is contained within the purple membrane (PM) of Halobacterium halobium. Artificial derivatives with improved optical properties can be generated by genetic methods and isolated from mutated halobacterial strains. The use of PM films that contain wild-type BR and BR variants as real-time recording media for various holographic applications has been reported previously, and the advantages of BR variants have been demonstrated. The high reversibility (≫ 105 record/erase cycles), the fast time scale of its photoconversions (femtoseconds to milliseconds), and the large photochromic shift (≈ 160 nm) occurring during its photocycle make it a promising material for real-time applications. A dual-axis joint-Fourier-transform (DA-JFT) correlator is used to demonstrate the applicability of PM films in holographic pattern recognition. One major advantage of PM films in this application is their high spatial resolution of more than 5000 lines/mm. Severe restrictions on the overall performance of the DA-JFT correlator system are caused by scattered light and result in a low signal-to-noise ratio. Since PM patches typically have a diameter in the range of the visible wavelengths that are used for hologram recording, light scattering is an intrinsic problem of PM films. The polarization recording properties of PM films are employed to overcome this problem. More than 20-fold improvement of the signal-to-noise ratio in the DA-JFT correlator output is obtained.

© 1992 Optical Society of America

History
Original Manuscript: October 26, 1990
Published: April 10, 1992

Citation
Norbert Hampp, Ralph Thoma, Dieter Oesterhelt, and Christoph Bräuchle, "Biological photochrome bacteriorhodopsin and its genetic variant Asp96 → Asn as media for optical pattern recognition," Appl. Opt. 31, 1834-1841 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-11-1834

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited