Optical device with a function of homogenizing and color separation, and optical illumination system for a projector using the same
AssigneeLG Electronics Inc.
InventorsTae Soo Park, Kee Tee Um
Life of this patent
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Abstract
The optical device with a function of homogenizing and color separation according to the present invention has a shape of rod, makes a distribution of light uniform by totally u reflecting the incidence light at a boundary inside the device repeatedly, and separates the incidence light into light of different colors based on a wavelength band, the light of different colors outputted through different optical paths which are not overlaid one another.
Claims17
An optical device with a function of homogenizing and color separation, comprising:
- a rod lens;
- and
- a prism complex attached to said rod lens and including a plurality of triangular prisms having same medium as said rod lens, wherein said prism complex has at least one dichroic coating surfaces and a total reflection coating surface.
An optical device with a function of homogenizing and color separation, wherein the device has a shape of rod, makes a distribution of light uniform by totally reflecting the incidence light at a boundary inside the device repeatedly, and separates the incidence light into light of different colors based on a wavelength band, the light of different colors outputted through different optical paths which are not overlaid one another.
In a projector for projecting with a magnification a picture implemented on a small display device using a projecting lens, an optical illumination system for providing light required for the display device, comprising:
- a source of light for emitting light;
- an optical device with a function of homogenizing and color separation, comprising a rod lens and a prism complex attached to said rod lens and including a plurality of triangular prisms having same medium as said rod lens, wherein said prism complex has at least one dichroic coating surfaces and a total reflection coating surface;
- an anamorphic optical system for reducing an aspect ratio of an optical path of three colors light outputted in parallel from said optical device with the function of homogenizing and color separation to be equal to an aspect ratio of said small display device;
- and
- a rotating prism for refracting the three colors light from said anamorphic optical system into different parallel optical paths and scrolling the optical paths of the three colors light to be focused on said display device.
Dependencies are inferred from the claim text.