Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1997-03-24
1998-08-04
Ben, Loha
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, 359868, G02B 2714
Patent
active
057903123
ABSTRACT:
The invention relates to an optical system which is compact and light in weight with well corrected aberrations, and is suitable for use on an image display device designed to form no intermediate image, and an optical system best usable as an ocular optical system for use on a head- or face-mounted image display device. This optical system comprises an optical element 7 and a diffraction optical element 8 that are mutually decentered. Optical element 7 comprises at least three juxtaposed optical surfaces, at least one of which is constructed of a curved surface. Between the optical surfaces at least two reflections occur. Spaces between the optical surfaces are filled with a medium having a refractive index greater than 1. A light ray emerging from an image display element 6 is incident on the optical system and upon transmission through a first transmitting surface 5 of optical element 7 located in opposition thereto, is reflected at a first reflecting surface 3 and at a second reflecting surface 4, so that the light ray is guided to an eyeball of an observer upon transmission through a second transmitting surface 3.
REFERENCES:
patent: 4026641 (1977-05-01), Bosserman et al.
patent: 5093567 (1992-03-01), Staveley
patent: 5303085 (1994-04-01), Rallison
patent: 5379157 (1995-01-01), Wang
patent: 5453877 (1995-09-01), Gerbe et al.
patent: 5642227 (1997-06-01), Rallison
Ben Loha
Olympus Optical Co,. Ltd.
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