Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1991-04-24
1992-10-06
Oberley, Alvin E.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340784, 359630, G09G 302
Patent
active
051535696
ABSTRACT:
An optical apparatus using a display device is comprised of a lens system having an optical axis, a display device for displaying a video image on the optical axis, a beam splitter for splitting information of visual image, the beam splitter being formed so as to incline an angle of about 45 degrees relative to the optical axis and located under the lens system, and a shutter device disposed in front of the beam splitter for controlling transmission of image from the surrounding, wherein the video image is shown as a virtual image with the image from the surroundings when viewer peeps the video image from the back of the beam splitter.
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Nature, vol. 261, May 20, 1976, pp. 253-255.
Kawamura Akira
Togawa Kazuo
Au A.
Eslinger Lewis H.
Maioli Jay H.
Oberley Alvin E.
Sony Corporation
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