Optical: systems and elements – Lens – With multipart element
Patent
1990-07-11
1996-12-10
Sugarman, Scott J.
Optical: systems and elements
Lens
With multipart element
359708, 359742, G02B 308, G02B 1318
Patent
active
055837026
ABSTRACT:
Optical system intended to enlarge images, such as those produced by a television set. For this purpose is used an optical system such as an assembly including at least one thick lens (12) or its equivalent (for example a Fresnel lens), placed very close to the image (10) to be enlarged, that allows an enlarged image to be obtained, with the possibility for the observer (13) to move throughout a sufficiently wide zone while still observing an image without troublesome deformation.
REFERENCES:
patent: 3523721 (1970-08-01), Hofmann
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