Observation optical system using volume hologram

Details Observation optical system using volume hologram Observation optical system using volume hologram

2005-11-01

2005-11-01

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S016000, C359S630000, C359S631000, C359S643000

Reexamination Certificate

active

06961162

ABSTRACT:
An observation optical system comprises an image display element5and an eyepiece optical system which introduces an image formed by the image display element5to a center of an eye of an observer without forming an intermediate image, so as to allow the observer to observe the image as a virtual image. The eyepiece optical system is constructed and arranged to bend the optical axis using reflecting surfaces so as to be compact. The optical axis lies in a plane, with respect to which the optical system is formed symmetric. The optical system includes a prism3having an entrance surface33, a plurality of curved reflecting surfaces31, 32and an exit surface31. The reflecting surface32is provided with a volume hologram (HOE)4.Whereby, it is possible to provide an image observation optical system which can be made compact enough to be usable as an image display unit for a cellular phone or a portable intelligent terminal, and which can achieve high image definition and wide field angle while controlling chromatic aberration of magnification to be small.

REFERENCES:
patent: 5706136 (1998-01-01), Okuyama et al.
patent: 6222677 (2001-04-01), Budd et al.
patent: 6331916 (2001-12-01), Mukawa
patent: 0 687 0932 (1995-12-01), None
Mukawa et al., “Novel Virtual Image Optics for Reflective Microdisplays,” 20th International Display Research Conference, p. 96-99, (Sep. 25-28, 2000).

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