Optical: systems and elements – Lens – Eyepiece
Reexamination Certificate
2006-03-07
2006-03-07
Epps, Georgia (Department: 2873)
Optical: systems and elements
Lens
Eyepiece
C359S630000, C359S631000, C359S742000, C345S007000, C345S008000, C353S038000
Reexamination Certificate
active
07009775
ABSTRACT:
The invention relates to a display system wherein a Fresnel lens that forms an eyepiece optical system is curved to correct for decentration aberration, whereby a display screen can be wholly observed even in a decentered state. In the display system, an object image is projected via a relay optical system2near the eyepiece optical system1so that the exit pupil E1of the relay optical system2is projected via the eyepiece optical system1onto an observer's pupil position E0. The eyepiece optical system comprises an optical element having a Fresnel surface. The eyepiece optical system1and relay optical system2are located such that an axial chief ray emerging from the relay optical system2is obliquely incident on the eyepiece optical system1. The axial chief ray is defined by a light ray emerging from the center of the object, and passing through the relay optical system2and then through the center of the pupil E1of the relay optical system2. The optical element that forms the eyepiece optical system1is curved such that decentration aberration of pupil aberrations occurring at the eyepiece optical system1is corrected.
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Definition of Fresnel lens provided in the Laurin Photonics Dictionary at http://www.photonics.com/dictionary.
Dinh Jack
Epps Georgia
Kenyon & Kenyon
Olympus Corporation
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