Abstract:
A beam splitting apparatus applicable for a projecting system is provided. The beam splitting apparatus comprises a shaft, a plurality of dichroic mirrors and a housing. The shaft and the dichroic mirrors are surrounded and sealed by the housing. The outer surface of the shaft is screw-surrounded by the dichroic mirrors. The dichroic mirrors rotate with the shaft and split an incident light into a plurality of primary color light beams, and scroll the position of the primary color light beams circularly. The beam splitting apparatus can reduce the noise and the energy loss, and raise the display frames rate to increase the display quality.
Abstract:
A projection display device which displays an image by projecting the image on a screen includes a laser light source 1 (1a, 1b, 1c) for emitting coherent light, a display device 3 for forming an image to be displayed on a screen 5 in an area illuminated by a luminous flux from the laser light source 1, a first diffusion plate 14 for diffusing a luminous flux, and a second diffusion plate 15 for diffusing a luminous flux. The first diffusion plate 14 is provided in at least one of a conjugate position of the laser light source 1 or the vicinity of the conjugate position in the optical path of the optical system including the laser light source 1 through the screen 5. The second diffusion plate 15 is provided in at least one of a conjugate position of the display device 3 or the vicinity of the conjugate position. At least one of the first diffusion plate 14 and the second diffusion plate 15 fluctuates perpendicularly to an optical axis.
Abstract:
A projection display device which displays an image by projecting the image on a screen includes a laser light source for emitting coherent light, a display device for forming an image to be displayed on a screen in an area illuminated by a luminous flux from the laser light source, a first diffusion plate for diffusing a luminous flux, and a second diffusion plate for diffusing a luminous flux. The first diffusion plate is provided in at least one of a conjugate position of the laser light source or the vicinity of the conjugate position in the optical path of the optical system including the laser light source through the screen. The second diffusion plate is provided in at least one of a conjugate position of the display device and the vicinity of the conjugate position.
Abstract:
The present invention relates to an image projection device having a linear array of LED's in a common substrate, a common lens group to collimate light from each LED, and a single dichroic wedge having dichroic coatings for reflecting each light source to a condensing means which condenses the light to a distal surface. The image projection device therefore provides for a smaller optical package which is more easily accommodated in mobile devices such as mobile telephones, and which is simple and cheap to manufacture.
Abstract:
An image display apparatus is provided with a laser light source, a spatial light modulation device for modulating the laser light emitted from the laser light source, a display surface for displaying the modulated light, an optical pixel aperture enlarging member for distributing the luminance of the laser light while introducing the laser light to apertures of pixels of the spatial light modulation device; and a display pixel aperture enlarging portion for optically enlarging the modulated light by the apertures of the pixels of the spatial light modulation device corresponding to pixels of an image to be displayed on the display surface. The luminance of a partial area of each pixel of the image displayed on the display surface is controlled to be below the threefold of an average value of the luminance in the area of the entire pixel by the optical pixel aperture enlarging member and the display pixel aperture enlarging portion, thereby accomplishing speckle noise reduction and an improvement of light utilization efficiency.
Abstract:
First and second lamps 1, 2, first and second ellipsoidal mirrors 3, 4, first and second spherical mirrors 5, 6, and a plane mirror 7 are provided. The first spherical mirror 5 is provided on the same side as the first ellipsoidal mirror 3 with respect to the lamp 1, and the second spherical mirror 6 is provided on the opening side of the second ellipsoidal mirror 4 with respect to the second lamp 2, so that they reflect a respective part of light beams emitted from the first and second lamps toward the first and second ellipsoidal mirrors 3, 4. The first and second ellipsoidal mirrors are arranged such that the optical axes of their reflected light beams intersect with each other, so that they condense respective light beams emitted from the first and second lamps and respective light beams reflected at the first and second spherical mirrors 5 and 6. The plane mirror 7 reflects at a reflective film 7a, light beams condensed by the first ellipsoidal mirror 3, and transmits via a light-transmitting portion 5 where no reflective film is provided, light beams condensed by the second ellipsoidal mirror 4; accordingly, light beams emitted from the first and second lamps are combined so as to become light beams travelling coaxially and in the same direction. This can reduce the optical loss when combining light beams emitted from a plurality of lamps.
Abstract:
An optical projecting system includes a light-splitting unit for splitting composite source light into a plurality of composite light beam components, and a reflective color wheel rotatable about a rotation axis and including a plurality of multi-layer light-reflecting sections for further splitting each of the composite light beam components into a plurality of colored light beam components for subsequent modulation and projection. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along the rotation axis, and each being capable of reflecting light within a predefined distinct wavelength range, and permitting transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.
Abstract:
A light guide body is arranged and light emerging from the light guide body is made incident on a light guide plate. The light guide body is formed to introduce the incident light to the light guide plate in such a manner that the light incident on an end surface of the light guide plate has a specified light quantity distribution.
Abstract:
An illumination apparatus includes: a light source including at least one light-emitting element, the light-emitting element being configured to emit light and having an uneven light distribution characteristic; a coupling optical system disposed corresponding to the light source and configured to convert the light emitted from the light source into substantially parallel light; a light condensing optical system configured to condense the light from the light source, converted into the substantially parallel light by the coupling optical system, at a predetermined focal position; an illuminated surface as an object to be illuminated by the light from the light source condensed by the light condensing optical system; and an optical element disposed between the coupling optical system and the light condensing optical system, and configured to reduce irregular distribution of an amount of light on the illuminated surface caused by the light distribution characteristic of the light-emitting element.
Abstract:
A color separation and polarization device is provided, which comprises a lens module, having a first frame including a polarization material received therein, and configured with a first light-entrance surface and a first light-emitting surface having a lens structure disposed thereon respectively, and a triangle-shaped optical structures, configured with a second light-entrance surface and a second light-emitting surface having triangle-shaped microstructures disposed thereon respectively. When a white light beam enters the first light-entrance surface, it is polarized by the polarization material, converged by the lens structure of the first light-emitting surface, splitting into a red beam, a green beam, and a blue beam by the triangle-shaped microstructures of the second light-entrance surface, and finally the three color beam are collimated by the triangle-shaped microstructures of the second light-emitting surface. By means of the device, light energy usage efficiency and light collimation and convergence are capable of being enhanced and improved.