Abstract: A projector comprising a first light source, a second light source, a light combining element, a diffuser and an actuator is provided. The first light source provides a first light beam with high coherence. The second light source provides a second light beam with high coherence. The light combining element comprises a first surface, wherein the first and second light beams enter the light combining element, and are combined into a mixed light beam therein. The diffuser is disposed on the first surface of the light combining element, wherein the first and second light beams enter the diffuser. The actuator is connected to the light combining element, wherein the actuator actuates the light combining element to vary locations where the first and second light beams enter the diffuser.

Abstract: A projection system includes an illumination apparatus, an imaging apparatus, and a projection lens. The illumination apparatus includes a light source, a lens array, light collecting elements, and a converging lens array. The light source provides a parallel light beam. The light collecting elements are disposed at a side of the lens array, and arranged in an array. Each light collecting element has a second end facing the light source, a first end corresponding to the second end, and at least one side connected between the first end and the second end. Each light collecting element shrinks from its second end to its first end. The side of the light collecting element has at least one reflective surface. The converging lens array scales the light beam exiting the light collecting element. The imaging apparatus forms an image from the light beam. The projection lens projects the image to a surface.

Abstract: A projection apparatus including an illumination system, a light valve, a first optical element, a first projection lens, and a second projection lens is provided. The illumination system is suitable to provide an illumination beam, and the light valve is disposed on a transmission path of the illumination beam. The light valve is suitable to convert the illumination beam into an image beam. The first optical element is disposed on a transmission path of the image beam. A portion of the image beam is reflected by the first optical element, and a remaining portion of the image beam passes through the first optical element. The first projection lens is disposed on a transmission path of the image beam passing through the first optical element, and the second projection lens is disposed on a transmission path of the image beam reflected by the first optical element.

Abstract: A projector comprising a first light source, a second light source, a light combining element, a diffuser and an actuator is provided. The first light source provides a first light beam with high coherence. The second light source provides a second light beam with high coherence. The light combining element comprises a first surface, wherein the first and second light beams enter the light combining element, and are combined into a mixed light beam therein. The diffuser is disposed on the first surface of the light combining element, wherein the first and second light beams enter the diffuser. The actuator is connected to the light combining element, wherein the actuator actuates the light combining element to vary locations where the first and second light beams enter the diffuser.

Abstract: An indicator light device includes a circuit board, at least two light-emitting components, a light-guiding plate, and a housing. The light-emitting components are disposed on the circuit board and are spaced apart from each other. The light-guiding plate includes a plate body disposed on the circuit board, and at least two light-guiding members extending from the plate body in a direction away from the circuit board and corresponding respectively in position to the light-emitting components. The plate body has a surface adjacent to the circuit board and formed with at least one groove that is disposed between the light-guiding members and that defines a fluid space for receiving a fluid transmission medium. The housing is formed with at least two through holes, and is disposed on the plate body of the light-guiding plate such that the light-guiding members respectively extend into the through holes.

Abstract: A projection apparatus including an illumination system, a light valve, a first optical element, a first projection lens, and a second projection lens is provided. The illumination system is suitable to provide an illumination beam, and the light valve is disposed on a transmission path of the illumination beam. The light valve is suitable to convert the illumination beam into an image beam. The first optical element is disposed on a transmission path of the image beam. A portion of the image beam is reflected by the first optical element, and a remaining portion of the image beam passes through the first optical element. The first projection lens is disposed on a transmission path of the image beam passing through the first optical element, and the second projection lens is disposed on a transmission path of the image beam reflected by the first optical element.

Abstract: A projection system has an illumination apparatus, a converging lens array, an imaging apparatus, and a projection lens. The illumination apparatus has a light source, a light collecting element, and a rod integrator. The light collecting element has a frustum shape, and connects to the rod integrator at an end with a smaller surface area. Another end of the light collecting element with a larger surface area faces the light source. The light beam from the light source enters the light collecting element and is reflected by the light collecting element into the rod integrator. The rod integrator homogenizes the light beam and reflects the light beam to the imaging apparatus, which transforms the light beam into an image beam and displays an image to a surface through the projection lens.

Abstract: An illumination system including a light source module and a light integration rod disposed nearby the light source module is provided. The light source module includes a rotary table and multiple point light sources. The rotary table has a rotating shaft and the rotating shaft is surrounded by the point light sources disposed on the rotary table. A part of the point light sources rotated in the front of the light integration rod in turn emit lights to form an illumination light beam. Moreover, an optical projection apparatus having the illumination system is provided.