Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1998-03-02
1999-04-06
Ben, Loha
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, 359629, 359364, G02B 2714
Patent
active
058926240
ABSTRACT:
A virtual image display system is provided which is made thinner through the use of an immersed beam splitter, and in one embodiment, total internal reflection. The display system includes an imaging surface on which a source object is formed, a first optical element having a reflective function and a magnification function, a second optical element having a magnification function and an immersed beam splitting element positioned between the first and second optical elements, the immersed beam splitting element including a beam splitter surrounded by an optically transparent material having a refractive index greater than that of air. An illumination source projects the source object formed at the imaging surface through the optically transparent material to the beam splitter. The beam splitter reflects the projected source object to the first optical element. The first optical element magnifies the projected source object and reflects a magnified virtual image of the projected source object to the beam splitter. The magnified virtual image traverses the beam splitter to the second optical element which magnifies the magnified virtual image to produce a compound magnified virtual image of the source object.
REFERENCES:
patent: 5506728 (1996-04-01), Edwards et al.
patent: 5530586 (1996-06-01), Yasugaki
patent: 5546227 (1996-08-01), Yasugaki et al.
patent: 5596433 (1997-01-01), Konuma
Hildebrand Alfred P.
Kintz Gregory J.
Ben Loha
Siliscape
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