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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 25 — Dec. 13, 2004
  • pp: 6350–6365

Multiple imaging technique for extending depth of focus in retinal displays

Marc vonWaldkirch, Paul Lukowicz, and Gerhard Tröster  »View Author Affiliations


Optics Express, Vol. 12, Issue 25, pp. 6350-6365 (2004)
http://dx.doi.org/10.1364/OPEX.12.006350


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Abstract

Limited depth of focus is among the main problems of todays see-through head-mounted displays. In this paper we propose and evaluate a new solution to this problem: the use of the coherent multiple imaging technique in a retinal projection display by incorporating an appropriate phase-only mask. The evaluation is based on a schematic eye model and on the partial coherence simulation tool SPLAT which allows us to calculate the projected retinal images of a text target. Objective image quality criteria demonstrate that this approach is promising provided that partially coherent illumination light is used. In this case, psychometric measurements reveal that the depth of focus for reading text can be extended by a factor of up to 3.2. For fully coherent and incoherent illumination, however, the retinal images suffer from structural and contrast degradation effects, respectively.

© 2004 Optical Society of America

OCIS Codes
(110.4190) Imaging systems : Multiple imaging
(110.4980) Imaging systems : Partial coherence in imaging
(120.2820) Instrumentation, measurement, and metrology : Heads-up displays
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices

ToC Category:
Research Papers

History
Original Manuscript: November 12, 2004
Revised Manuscript: December 2, 2004
Published: December 13, 2004

Citation
Marc von Waldkirch, Paul Lukowicz, and Gerhard Tröster, "Multiple imaging technique for extending depth of focus in retinal displays," Opt. Express 12, 6350-6365 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-25-6350


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