Abstract: An illumination system is provided, which provides a plurality of light beams to a light valve. The illumination system includes a plurality of light sources, a polynomial lens and an optical scanning element. The light sources are capable of emitting the light beams. The polynomial lens is disposed on light paths of the light beams and located between the light sources and the light valve. The polynomial lens shapes the light beams into a plurality of rectangular light beams. The optical scanning element is disposed on light paths of the rectangular light beams and located between the polynomial lens and the light valve. The optical scanning element is capable of moving for scanning the rectangular light beams on the light valve unidirectionally or back and forth along a direction, and the rectangular light beams partially overlap with each other on the light valve.

Abstract: A laser module including a light emitter, a polarizing and filtering unit, a nonlinear optical crystal, and a first filter is provided. The light emitter emits a first beam. The polarizing and filtering unit is disposed on a transmission path of the first beam. A part of the first beam passes through the polarizing and filtering unit to become a second beam with a specific polarization direction. The nonlinear optical crystal is disposed on a transmission path of the second beam from the polarizing and filtering unit. The nonlinear optical crystal converts a part of the second beam into a third beam. The first filter is disposed on a transmission path of a non-converted part of the second beam and the third beam from the nonlinear optical crystal. The non-converted part of the second beam is reflected by the first filter. The third beam passes through the first filter.

Abstract: A light emitting device package structure is described. The light emitting device package structure includes a substrate serving as a carrier supporting a light emitting device chip. The substrate and the light emitting device chip have a chip side and a substrate side separately. A first electrode layer is disposed on a first surface of the light emitting device chip and a second electrode layer is disposed on a second surface of the light emitting device chip, in which the first surface and the second surface are not coplanar. A first conductive trace is electrically connected to the first electrode layer and a second conductive trace is electrically connected to the second electrode layer. At least the first conductive trace or the second conductive trace is formed along the chip side and the substrate side simultaneously.

Abstract: A laser module including a light emitter, a polarizing and filtering unit, a nonlinear optical crystal, and a first filter is provided. The light emitter emits a first beam. The polarizing and filtering unit is disposed on a transmission path of the first beam. A part of the first beam passes through the polarizing and filtering unit to become as a second beam with a specific polarization direction. The nonlinear optical crystal is disposed on a transmission path of the second beam from the polarizing and filtering unit. The nonlinear optical crystal converts a part of the second beam into a third beam. The first filter is disposed on a transmission path of the other part of the second beam and the third beam from the nonlinear optical crystal. The other part of the second beam is reflected by the first filter. The third beam passes through the first filter.

Abstract: An illumination system is provided, which provides a plurality of light beams to a light valve. The illumination system includes a plurality of light sources, a polynomial lens and an optical scanning element. The light sources are capable of emitting the light beams. The polynomial lens is disposed on light paths of the light beams and located between the light sources and the light valve. The polynomial lens shapes the light beams into a plurality of rectangular light beams. The optical scanning element is disposed on light paths of the rectangular light beams and located between the polynomial lens and the light valve. The optical scanning element is capable of moving for scanning the rectangular light beams on the light valve unidircetionally or back and forth along a direction, and the rectangular light beams partially overlap with each other on the light valve.

Abstract: A laser module including a light emitter, a filter, a nonlinear optical crystal, a first temperature adjuster, and a second temperature adjuster is provided. The light emitter emits a first beam. The filter is disposed on a transmission path of the first beam and reflects the first beam. The nonlinear optical crystal is disposed on the transmission path of the first beam and between the light emitter and the filter. The nonlinear optical crystal converts a part of the first beam into a second beam. A frequency of the second beam is larger than a frequency of the first beam. The second beam passes through the filter. The first temperature adjuster is connected with the filter for adjusting a temperature of the filter. The second temperature adjuster is connected with the nonlinear optical crystal for adjusting a temperature of the nonlinear optical crystal.

Abstract: A laser module including at least one light-emitting unit, a filter and a poled nonlinear optical crystal is provided. The light-emitting unit provides an incoherent beam. The filter is disposed on the transmission path of the incoherent beam and reflects at least a part of the incoherent beam. The poled nonlinear optical crystal is disposed on the transmission path of the incoherent beam, and has a plurality of poled portions. The poled portions have a plurality of first poled portions and a plurality of second poled portions which are alternately disposed. The incoherent beam passes through at least a part of the first poled portions and a part of the second poled portions. At least parts of the poled portions have different average widths from each other in the direction parallel to the chief ray of the incoherent beam.

Abstract: A light source module for a scanning projection apparatus is provided. The light source module includes a plurality of point light sources and at least one light blocking unit. Each point light source is capable of providing a color light beam. The color light beams are combined into a combined light beam and the colors of the color light beams are different. The at least one light blocking unit is capable of being inserted into a transmission path of at least one of the color light beams at a fixed frequency to block a portion of the color light beam.

Abstract: A projection apparatus including an actuator, a light source, and a projection lens is provided. The light source is disposed on the actuator and is capable for emitting light beams sequentially. The actuator is capable for driving the light source so as to change the transmission paths of the light beams. The projection lens is disposed on the transmission paths of the light beams. The volume of the projection apparatus can be reduced since the light source is directly disposed on the actuator.

Abstract: An optical mouse suitable for being put on a surface of an object and including a light source, an image sensor, and a total internal reflection (TIR) prism is provided. The light source is suitable for emitting a light beam, and the TIR prism is disposed between the surface of the object and image sensor located on an optical path of the light beam. The TIR prism has an air gap which reflects the light beam emitted from the light source to the surface. Next, the light beam is reflected by the surface back to the TIR prism, and the light beam reflected by the surface passes through the air gap to be captured by the image sensor. Additionally, an optical mouse using Michelson interference principle is provided. The above-mentioned optical mice improve the accuracy when capturing images and reduce the probability of incorrect image judgment.

Abstract: A reflector module for a projection system includes a base, a reflecting component provided with a reflecting surface, an axle unit, and at least one actuator. The base has a surrounding wall with a bottom side, and a bottom wall connected to the surrounding wall for closing the bottom side of the surrounding wall. The reflecting component is disposed in the base, and has side edges and an underside surface. The axle unit is disposed on the side edges of the reflecting component, and interconnects the surrounding wall of the base and the reflecting component such that the reflecting component is mounted tiltably in the base about the axle unit. The actuator is mounted between the bottom wall of the base and the underside surface of the reflecting component, and is operable to drive movement of the reflecting component to cause the reflecting surface to oscillate about the axle unit.

Abstract: A method is provided for forming a waveguide region within a periodically domain reversed ferroelectric crystal wherein the waveguide region has a refractive index profile that is vertically and horizontally symmetric. The symmetric profile produces effective overlapping between quasi-phasematched waves, a corresponding high rate of energy transfer between the waves and a symmetric cross-section of the radiated wave. The symmetric refractive index profile is produced by a method that combines the use of a diluted proton exchange medium at a high temperature which produces a region of high index relatively deeply beneath the crystal surface, followed by a reversed proton exchange which restores the original crystal index of refraction immediately beneath the crystal surface.

Abstract: A reflector module for a projection system includes a base, a reflecting component provided with a reflecting surface, an axle unit, and at least one actuator. The base has a surrounding wall with a bottom side, and a bottom wall connected to the surrounding wall for closing the bottom side of the surrounding wall. The reflecting component is disposed in the base, and has side edges and an underside surface. The axle unit is disposed on the side edges of the reflecting component, and interconnects the surrounding wall of the base and the reflecting component such that the reflecting component is mounted tiltably in the base about the axle unit. The actuator is mounted between the bottom wall of the base and the underside surface of the reflecting component, and is operable to drive movement of the reflecting component to cause the reflecting surface to oscillate about the axle unit.

Abstract: A method is provided for forming a waveguide region within a periodically domain reversed ferroelectric crystal wherein the waveguide region has a refractive index profile that is vertically and horizontally symmetric. The symmetric profile produces effective overlapping between quasi-phasematched waves, a corresponding high rate of energy transfer between the waves and a symmetric cross-section of the radiated wave. The symmetric refractive index profile is produced by a method that combines the use of a diluted proton exchange medium at a high temperature which produces a region of high index relatively deeply beneath the crystal surface, followed by a reversed proton exchange which restores the original crystal index of refraction immediately beneath the crystal surface.

Abstract: A method of fabricating a waveguide in ferroelectric crystals, comprising the following steps. A ferroelectric crystal is provided. A vapor phase proton is diffused into the ferroelectric crystal by a vapor proton-exchange process to form a vapor proton-exchange (VPE) waveguide material structure having a step refractive index profile. The VPE waveguide material structure is treated with one or more processes selected from the group consisting of: a post thermal anneal process and an additional reverse proton-exchange process to complete fabrication of the waveguide, whereby the refractive index profile of the fabricated waveguide can be flexibly optimized. This method can form a high-quality waveguide and also provides a full degree of design flexibility for device optimization in several applications.