Illumination system and projector adopting the same
First Claim
1. An illumination system comprising:
- an illumination unit which includes;
at least one light emitting device which emits a light beam having a predetermined wavelength, and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device; and
an optical path changer which changes a proceeding path of an incident light passing through the holographic optical element.
1 Assignment
0 Petitions
Accused Products
Abstract
An illumination system includes an illumination unit having at least one light emitting device which emits a light beam of a predetermined wavelength and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device, and an optical path changer which changes a proceeding path of an incident light passing through the holographic optical element. A projector includes at least one illumination unit having at least one light emitting device which emits a light beam of a predetermined wavelength and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device, an optical path changer which changes a proceeding path of an incident light input through the holographic optical element, a display device which forms an image by processing a light beam input from the optical path changer according to an image signal, and a projection lens unit which magnifies the image formed by the display device and projects the magnified image toward a screen.
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Citations
60 Claims
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1. An illumination system comprising:
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an illumination unit which includes;
at least one light emitting device which emits a light beam having a predetermined wavelength, and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device; and
an optical path changer which changes a proceeding path of an incident light passing through the holographic optical element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An illumination system comprising:
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at least one light emitting device or light emitting device array which emits a light beam having a wavelength;
a first holographic optical element which condenses the light beam emitted from the light emitting device or light emitting device array;
a second holographic optical element which produces an incident light beam passing through the first holographic optical element into a parallel light beam with a reduced cross section thereof;
a third holographic optical element which reduces a diffraction angle of an incident light beam which is made into the parallel light beam by the second holographic optical element; and
an optical path changer which changes a proceeding path of an incident light beam passing through the third holographic optical element. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A projector comprising:
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at least one illumination unit which includes;
at least one light emitting device which emits a light beam having a predetermined wavelength, and at least one holographic optical element which reduces a cross section of the light beam emitted from the light emitting device;
an optical path changer which changes a proceeding path of an incident light input through the holographic optical element;
a display device which processes an image signal of a light beam input from the optical path changer and forms an image thereof; and
a projection lens unit which magnifies the image formed by the display device and projects the magnified image. - View Dependent Claims (36, 37, 38, 39, 40, 44, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 58, 59, 60)
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53. An illumination system comprising:
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at least one illumination unit which includes;
at least one light emitting device which emits a light beam having a predetermined wavelength, and at least one diffractive optical device which reduces a cross section of the light beam emitted from the light emitting device; and
an optical path changer which changes a proceeding path of an incident light beam input through the diffractive optical device. - View Dependent Claims (54, 55, 56, 57)
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Specification