Abstract: An endoscope module including an annular prism, an annular lens, an annular stop, and an annular image sensor is provided. The annular prism has an annular reflective inclined surface, a light incident surface, and a light emitting surface. The light incident surface faces a side surface and the light emitting surface faces away from a front surface. The annular stop is disposed on a side of the light incident surface of the annular prism and surrounds the annular prism. The annular lens is disposed between the annular prism and the annular image sensor. A lateral light from the side surface is reflected to the annular lens by the annular reflective inclined surface after passing through the annular stop and then entering the annular prism, and is then condensed to the annular image sensor by the annular lens.

Abstract: An endoscope module including an annular prism, an annular lens, an annular stop, and an annular image sensor is provided. The annular prism has an annular reflective inclined surface, a light incident surface, and a light emitting surface. The light incident surface faces a side surface and the light emitting surface faces away from a front surface. The annular stop is disposed on a side of the light incident surface of the annular prism and surrounds the annular prism. The annular lens is disposed between the annular prism and the annular image sensor. A lateral light from the side surface is reflected to the annular lens by the annular reflective inclined surface after passing through the annular stop and then entering the annular prism, and is then condensed to the annular image sensor by the annular lens.

Abstract: A self-temperature focus compensation device adapted to cooperate with a lens group and including at least one Fresnel lens group is provided. Each Fresnel lens group has zero focal power at a specific temperature and is a cemented lens. Each Fresnel lens group includes a first Fresnel lens and a second Fresnel lens. The first Fresnel lens has positive focal power. The second Fresnel lens has negative focal power. A sum of a focal power change of the at least one Fresnel lens group with a temperature change and a focal power change of the lens group with the temperature change is zero.

Abstract: A self-temperature focus compensation device adapted to cooperate with a lens group and including at least one Fresnel lens group is provided. Each Fresnel lens group has zero focal power at a specific temperature and is a cemented lens. Each Fresnel lens group includes a first Fresnel lens and a second Fresnel lens. The first Fresnel lens has positive focal power. The second Fresnel lens has negative focal power. A sum of a focal power change of the at least one Fresnel lens group with a temperature change and a focal power change of the lens group with the temperature change is zero.

Abstract: A mini wide-angle lens module includes a first lens, a second lens, an aperture, a third lens, a fourth lens and a fifth lens. The first lens and the fifth lens have negative refractive power. The second lens, the third lens and the fourth lens have positive refractive power. The mini wide-angle lens module satisfies at least one of the following material relationships: (1) 0<V1?V2<20, (2) 1.78<I5<2.2, 16<V5<35, (3) 0.75<I3/I1<0.95, 1.05<I5/I1<1.25, 15<V3?V1<40 and 20<V1?V5<45, and (4) 1.65<I2<2.2, 35<V2<70, V4?V5>20 and I5?I4<0.4, wherein V1, V2, V3, V4 and V5 are ABBE numbers, and I1, I2, I3, I4 and I5 are refractive indices.

Abstract: A LCOS projection system includes an illumination device, a LCOS microdisplay element, a polarization beam splitter, an optical projection lens, and a beam recycling module. A first portion of the lighting beams provided by the illumination device are transmissible through the polarization beam splitter and directed to the LCOS microdisplay element. A second portion of the lighting beams provided by the illumination device and from the polarization beam splitter are introduced into the beam recycling module. By the beam recycling module, a polarization state of the second portion of the lighting beams is converted. Consequently, the second portion of the lighting beams in the converted polarization state can also be projected onto the LCOS microdisplay element. The beam recycling module includes a total internal reflection prism, which is arranged in a transmission path of the first portion and the second portion of the lighting beams.

Abstract: A color light mixing device, a color light mixing method and a small-sized projecting system using the color light mixing device are provided. The color light mixing device includes a tube structure, a plurality of light-emitting units, a reflective polarizer and a microlens assembly. The light-emitting units are located at an inlet end of the tube structure. The reflective polarizer is located at the other end of the tube structure. The microlens assembly is arranged between the light-emitting units and the reflective polarizer. By the color light mixing device, the light beams with a single polarization state are homogenized and outputted to a microdisplay element of the small-sized projecting system. By an optical projection lens assembly of the small-sized projecting system, an image shown on the microdisplay element is projected onto a screen.

Abstract: A projection system includes an illumination device, a LCOS microdisplay element, an optical projection lens, a total internal reflection prism, and a polarizer. The polarizer is a reflective polarizer or an absorptive polarizer. The total internal reflection prism is arranged between the illumination device, the LCOS microdisplay element and the optical projection lens. A plurality of lighting paths are created between the illumination device and the LCOS microdisplay element. A plurality of imaging paths are created between the LCOS microdisplay element and the optical projection lens. The polarizer is only located in the lighting paths.

Abstract: A color light mixing device, a color light mixing method and a small-sized projecting system using the color light mixing device are provided. The color light mixing device includes a tube structure, a plurality of light-emitting units, a reflective polarizer and a microlens assembly. The light-emitting units are located at an inlet end of the tube structure. The reflective polarizer is located at the other end of the tube structure. The microlens assembly is arranged between the light-emitting units and the reflective polarizer. By the color light mixing device, the light beams with a single polarization state are homogenized and outputted to a microdisplay element of the small-sized projecting system. By an optical projection lens assembly of the small-sized projecting system, an image shown on the microdisplay element is projected onto a screen.

Abstract: The present invention relates to a scanning module, which is capable of integrating optical paths of illuminating and imaging for size reduction, and improving the quality of scanned image by using optical polarizers for filtering, and further achieving the same effect as the “projection scanning” digital camera. The scanning module comprises: a light source, a first polarizer, a quarter-wave plate, a polarizing beamsplitter, an image detection device, and a second polarizer. The light from the light source consists of both a first-polarized and a second-polarized light. The first polarizer is placed in front of the light source that only allows the first-polarized light to pass through. The optics unit directs the first-polarized light to a scanning object and transforms the reflected light into the second-polarized light before receiveded by the image detection device for image acquiring.

Abstract: The invention discloses a lighting system which includes a light source (11), a lens group (12) and an aspherical reflector (13). The light source includes an elliptical reflection cover (111). A light beam emitting from the light source is focused on an entry of the lens group via the elliptical reflection cover. The lens group regulates the light beam to a round patch and then which is projected onto the aspherical reflector. The aspherical reflector changes the round patch to an inverse trapezia patch. Then the inverse trapezia patch can be projected on an object (14) and become a large square patch in a short distance. The utilization efficiency of the light energy is enhanced in the lighting system, and the lighting system includes a small number of components, uses the point light source, and becomes easy to produce, and convenient to repair.

Abstract: A light-emitting device includes a light-emitting component and a lens. The lens includes a bottom surface, a first reflecting surface, a second reflecting surface, and a refracting surface such that light entering the lens through the bottom surface and directly incident on the first reflecting surface is reflected from the first reflecting surface to the second reflecting surface, is subsequently reflected from the second reflecting surface to the refracting surface, and is then refracted from the refracting surface to exit the lens, and that light entering the lens through the bottom surface and directly incident on the second reflecting surface is reflected from the second reflecting surface to the refracting surface, and is then refracted from the refracting surface to exit the lens.

Abstract: The present invention relates to a scanning module, which is capable of integrating optical paths of illuminating and imaging for size reduction, and improving the quality of scanned image by using optical polarizers for filtering, and further achieving the same effect as the “projection scanning” digital camera. The scanning module comprises: a light source, a first polarizer, a quarter-wave plate, a polarizing beamsplitter, an image detection device, and a second polarizer. The light from the light source consists of both a first-polarized and a second-polarized light. The first polarizer is placed in front of the light source that only allows the first-polarized light to pass through. The optics unit directs the first-polarized light to a scanning object and transforms the reflected light into the second-polarized light before receiveded by the image detection device for image acquiring.

Abstract: A projector includes: a projection lens module; a kernel having at least a modulator and at least a polarization plate disposed between the projection lens module and the modulator; and a compensator disposed between and aligned with the projection lens module and the kernel along an optical path, and including a transparent plate that has a light entrance surface and a light exit surface opposite to the light entrance surface. The transparent plate has a thickness from the light entrance surface to the light exit surface along a direction of the optical path such that the thickness decreases from the first end toward the second end of the transparent plate.

Abstract: In a liquid crystal projection display, first, second and third color components of an input light beam are processed by first, second and third polarizers that are disposed respectively perpendicular to propagation directions of the first, second and third color components. First, second and third liquid crystal modulators modulate the first, second and third color components from the polarizers. First, second and third analyzers process the modulated first, second and third color components, respectively, and are disposed perpendicular to the propagation directions of the first, second and third color components. The first, second and third liquid crystal modulators are disposed respectively at an angle relative to a recombiner unit such that an output light beam can be provided by the recombiner unit to a projection lens group with a propagation direction that is parallel to an optical axis of the projection lens group.

Abstract: An image projector system includes a light source, a light-modulating device, and a projector lens set. The light source includes a rectangular housing formed with a light-transmissive output port and at least four light-transmissive input ports, at least four light emitting diode modules, and a mirror set mounted in the housing for directing light beam outputs of the light emitting diode modules that are transmitted into the housing through the light-transmissive input ports to pass through the light-transmissive output port for processing by the light-modulating device. The light beam output of each of the light emitting diode modules has a wavelength band within a range of from 400 to 700 nanometers, that is different from the other light emitting diode modules and that has a center wavelength spaced apart from that of the other light emitting diode modules by at least 20 nanometers.

Abstract: An image projector system includes a light source, a light-modulating device, and a projector lens set. The light source includes a rectangular housing formed with a light-transmissive output port and at least four light-transmissive input ports, at least four light emitting diode modules, and a mirror set mounted in the housing for directing light beam outputs of the light emitting diode modules that are transmitted into the housing through the light-transmissive input ports to pass through the light-transmissive output port for processing by the light-modulating device. The light beam output of each of the light emitting diode modules has a wavelength band within a range of from 400 to 700 nanometers, that is different from the other light emitting diode modules and that has a center wavelength spaced apart from that of the other light emitting diode modules by at least 20 nanometers.

Abstract: In a liquid crystal projection display, first, second and third color components of an input light beam are processed by first, second and third polarizers that are disposed respectively perpendicular to propagation directions of the first, second and third color components. First, second and third liquid crystal modulators modulate the first, second and third color components from the polarizers. First, second and third analyzers process the modulated first, second and third color components, respectively, and are disposed perpendicular to the propagation directions of the first, second and third color components. The first, second and third liquid crystal modulators are disposed respectively at an angle relative to a recombiner unit such that an output light beam can be provided by the recombiner unit to a projection lens group with a propagation direction that is parallel to an optical axis of the projection lens group.

Abstract: An image projecting device includes a synchronizing signal generating unit for generating first and second synchronizing control signals. A light source unit is operable so as to generate a plurality of light beams, each having a specific wavelength, and includes a plurality of light emitting diodes that are adapted to be controlled by multiple input signals so as to enable the light beams to have a respective intensity corresponding to a current projected one of multiple pixels of an image frame associated with the input signals. A reflecting unit is controlled by the first and second synchronizing control signals to reflect the light beams from the light source unit onto a corresponding coordinate on a screen for showing the current projected one of the pixels thereon.