Optical: systems and elements – Polarization without modulation – Polarization by birefringence
Reexamination Certificate
2007-07-06
2011-11-22
Lavarias, Arnel C (Department: 2872)
Optical: systems and elements
Polarization without modulation
Polarization by birefringence
C359S629000, C349S194000, C349S011000, C345S007000
Reexamination Certificate
active
08064137
ABSTRACT:
An optical system that projects a real image to a location in free space and includes one or more features located along the optical path that enhance the viewability of the real image. The optical system includes a converging element for converging a portion of source light so as to form the real image. One viewability-enhancing feature is the use of a broadband reflector-polarizer having high transmitting and reflecting efficiencies. Another viewability-enhancing feature is the use of polarizing elements having substantially matched bandwidth responses and/or comprising an achromatic design. An additional viewability-enhancing feature is the use of a wide-view film to increase the viewing angle of the image.
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Downs Rachlin & Martin PLLC
Lavarias Arnel C
PC Mirage, LLC
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