Claims
- 1. An optical projection apparatus, comprising:
an optical lighting system provided with a polarized beam splitter for polarizing a white light flux received from a white light source and combining said white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi-lens array consisting of a plurality of lens elements; and irradiating means for separating said white light flux into three primary color light fluxes of red, green, and blue and irradiating each of said three color light fluxes on one and the same display element at an angle different from the others; and projecting means for projecting said three primary color light fluxes modulated by said display element; wherein said optical lighting system and said projecting means are disposed between said white light source and said display element.
- 2. An optical projection apparatus in accordance with claim 1, wherein said white light flux from said white light source is separated into three primary colors in the order of red, blue, and green.
- 3. An optical projection apparatus in accordance with claim 1, wherein dichroic mirrors DM1 for transmitting cyan (blue and green), DM2 for transmitting yellow (green and red), and DM3 for transmitting red from said white light source are employed as said irradiating means for separating said white light flux from said white light source into three primary color light fluxes in the order of red, blue, and green and irradiating each of said three primary color light fluxes to the same display element at an angle different from the others, said mirrors DM1, DM2, and DM3 being disposed in order so that the wavelength of each of said dichroic mirrors satisfies the corresponding condition shown below so as to assure a reflectivity of at least 50%
λDM1≧585 λDM2≦520 λDM3≧580.
- 4. An optical projection apparatus, including:
an optical lighting system provided with a polarized beam splitter for polarizing white light flux from a white light source and combining said white light flux with other light fluxes and taking out only p-polarized waves; a multi-lens array consisting of a plurality of lens elements; and dichroic-coated mirrors for separating said white light flux into three primary color light fluxes of red, green, and blue and irradiating each of said primary color light fluxes on the same display element at an angle different from the others, so that said dichroic mirrors are disposed to let said p-polarized light component be reflected as s-polarized light, said display element being provided with a ½ wavelength plate at an optical output side thereof, whereby light fluxes modulated by said display element are restored to p-polarized lights again; and a projection lens unit for projecting said three primary color light fluxes of red, green, and blue modulated by said display element on a screen; wherein said optical lighting system and said projection lens unit are disposed between said white light source and said display element.
- 5. A projection type image display apparatus, including:
light separating means for separating white light flux output from a white light source and which passes through a polarized beam splitter and a micro-lens array in order of a red light flux, a blue light flux, and a green light flux in accordance with the proceeding direction of said white light flux, and for ejecting the separated red, blue and green light fluxes to the light injection surface side of a liquid crystal panel.
- 6. A projection type image display apparatus in accordance with claim 5, wherein
said light separating means includes:
a first dichroic mirror for transmitting a cyan (blue and green) light flux; a second dichroic mirror for transmitting a yellow (green and red) light flux; and a third dichroic mirror for transmitting a red light flux, said first to third dichroic mirrors being disposed in accordance with the proceeding direction of said white light flux.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-12730 |
Jan 1999 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation of U.S. application Ser. No. 09/484,525, filed Jan. 18, 2000, the subject matter of which is incorporated by reference herein.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09484525 |
Jan 2000 |
US |
Child |
10447999 |
May 2003 |
US |