Abstract: A polarizing rotation device including a rotation shaft, a driving element and a polarizing element is provided. The driving element is configured to drive the rotation shaft to rotate. The polarizing element is connected to the rotation shaft and is disposed on a transmission path of at least one beam, where the driving element is configured to drive the polarizing element to rotate sequentially while taking the rotation shaft as a rotation central axis, and when the polarizing element is rotated, the at least one beam penetrates through the polarizing element, and the at least one beam penetrating through the polarizing element has different polarization states at different time. Therefore, when a projection device is in a polarized stereoscopic mode, a color or brightness of a display image is uniform, and a user observes a 3D display image with good uniformity.

Abstract: An optical sensing system, including a light source, a projection module, and a sensing module, is provided. The light source is configured to provide an illumination beam transmitted to a target object by the projection module. The projection module is disposed on a transmission path of the illumination beam. The target object reflects the illumination beam to generate a sensing beam. The sensing module is disposed on a transmission path of the sensing beam and includes at least one sensing unit. The sensing unit includes a light receiving element and a sensing element, and has an optical axis. The light receiving element is located between the target object and the sensing element, and is configured to guide the sensing beam to the sensing element along the optical axis. The light receiving element has a focal point on the optical axis. The sensing element is not located at the focal point.

Abstract: The present invention provides a lighting system, including at least one light source, a depolarization element and a light homogenization element. The at least one light source is configured to provide at least one light beam. The depolarization element is disposed on a transmission path of the at least one light beam. The depolarization element includes a first optical element, and the first optical element is provided with a first optical axis. The light homogenization element is configured to allow the at least one light beam to pass to form an illuminating light beam. The incident direction where the at least one light beam is transmitted to the first optical element is not parallel to the first light axis. The depolarization element is located between the at least one light source and the light homogenization element. In addition, projection apparatus is also provided.

Abstract: A light source module configured to provide a detection light beam and including a plurality of light-emitting elements, a light spot shaping element, and a micro-mirror element, and a lidar device having a light-emitting end and comprising the light source module are provided. The light-emitting elements are configured to provide light beams. The light spot shaping element has a plurality of light spot shaping regions configured with different deflection angles and light beam convergence capabilities corresponding to the light beams. The micro-mirror element is located on a transmission path of the light beams from the light spot shaping element. A second light beam width of each light beam corresponds to an incidence angle of each light beam incident on a reflecting surface of the micro-mirror element, such that a light spot dimension of each light beam on the reflecting surface substantially coincides with a dimension of the reflecting surface.

Abstract: An illumination system including an exciting light source module, a wavelength conversion device and a light uniforming module is provided. The exciting light source module is configured to emit an exciting beam. The wavelength conversion device is disposed on a transmission path of the exciting beam and is configured to rotate around a central axis. The light uniforming module is disposed on the transmission path of the exciting beam and between the exciting light source module and the wavelength conversion device. After the exciting beam emitted from the exciting light source module passes through the light uniforming module, the exciting beam forms a light spot on the wavelength conversion device. The energy intensity distribution of the light spot along the radial direction about the central axis is that the energy intensity is lower in the center and higher on the two sides. A projection apparatus is also provided.

Abstract: An illumination system including an exciting light source module, a wavelength converter and an anisotropic diffusion element is provided. The exciting light source module is configured to emit an exciting beam. The wavelength converter is disposed on a transmission path of the exciting beam. The anisotropic diffusion element is disposed on the transmission path of the exciting beam and is located between the exciting light source module and the wavelength converter. The anisotropic diffusion element allows the passing exciting beam to expand in a light expanding direction, and the light expanding direction is substantially parallel to a fast axis of the exciting beam. A projection apparatus including the illumination system is also provided.

Abstract: A polarization rotation device including a rotation shaft, a driving element, a polarization element and a reflective element is provided. The polarization element is disposed on a transmission path of the at least one excitation light beam. The reflective element is disposed on a side of the polarization element. The driving element drives the polarization element to sequentially rotate with the rotation shaft as a rotation center axis. When the polarization element rotates, the excitation light beam is transmitted to the polarization element and passes through the polarization element and is again transmitted to and passes through the polarization element by the reflective element. The excitation light beam outputting from the polarization rotation device has different polarization states at different time periods. A projection device applying the polarization rotation device of the invention achieves the effect of uniform color or brightness when displaying images in a 3D display mode.

Abstract: An illumination system and a projection device are provided. The illumination system includes at least one laser light source providing at least one laser beam and a polarizing rotation module including a first axle, a first driving element, and a polarizing element. The first axle has a first revolution frequency. The polarizing element is disposed on a transmission path of the laser beam. The first driving element causes the polarizing element to rotate in a temporally sequenced manner. When the polarizing element is rotated, the laser beam is transmitted to the polarizing element at a specific frequency in a plurality of first time periods. The laser beam passing through the polarizing element has different polarizing states at different times. The specific frequency and the first revolution frequency of the first axle are not exactly divisible by each other. The invention can generate an image with uniform polarizing direction.

Abstract: The present invention provides a lighting system, including at least one light source, a depolarization element and a light homogenization element. The at least one light source is configured to provide at least one light beam. The depolarization element is disposed on a transmission path of the at least one light beam. The depolarization element includes a first optical element, and the first optical element is provided with a first optical axis. The light homogenization element is configured to allow the at least one light beam to pass to form an illuminating light beam. The incident direction where the at least one light beam is transmitted to the first optical element is not parallel to the first light axis. The depolarization element is located between the at least one light source and the light homogenization element. In addition, projection apparatus is also provided.

Abstract: A projection device includes an illumination system, a light valve, and a projection lens. The illumination system includes an excitation light source, a wavelength conversion element, a light converging lens, and a light integration rod. The excitation light source provides an excitation beam. The wavelength conversion element converts the excitation beam into a conversion beam. A greatest width in a light spot formed on the wavelength conversion element by the excitation beam is a first distance. A greatest width in a light spot formed on the wavelength conversion element by the conversion beam is a second distance. The second distance is greater than the first distance. The light integration rod receives the conversion beam from the light converging lens. The conversion beam generated by the wavelength conversion element of the invention is effectively projected to the light integration rod.

Abstract: A light source module includes a plurality of light combining elements, a plurality of first light emitting elements, and a plurality of second light emitting elements. Each of the light combining elements has a first reflecting surface and a second reflecting surface. Each of the first light emitting elements emits a first illuminating beam, and one of the first reflecting surfaces reflects the first illuminating beam to be transmitted along a light combining direction. Orthographic projections of the light combining elements on a reference plane are connected in sequence, and the reference plane is perpendicular to the light combining direction. Each of the second light emitting elements emits a second illuminating beam, and one of the second reflecting surfaces reflects the second illuminating beam to be transmitted along the light combining direction. In addition, a projector having the light source module is also provided.

Abstract: An illumination system including an exciting light source module, a wavelength converter and an anisotropic diffusion element is provided. The exciting light source module is configured to emit an exciting beam. The wavelength converter is disposed on a transmission path of the exciting beam. The anisotropic diffusion element is disposed on the transmission path of the exciting beam and is located between the exciting light source module and the wavelength converter. The anisotropic diffusion element allows the passing exciting beam to expand in a light expanding direction, and the light expanding direction is substantially parallel to a fast axis of the exciting beam. A projection apparatus including the illumination system is also provided.

Abstract: An illumination system and a projection device are provided. The illumination system includes at least one laser light source providing at least one laser beam and a polarizing rotation module including a first axle, a first driving element, and a polarizing element. The first axle has a first revolution frequency. The polarizing element is disposed on a transmission path of the laser beam. The first driving element causes the polarizing element to rotate in a temporally sequenced manner. When the polarizing element is rotated, the laser beam is transmitted to the polarizing element at a specific frequency in a plurality of first time periods. The laser beam passing through the polarizing element has different polarizing states at different times. The specific frequency and the first revolution frequency of the first axle are not exactly divisible by each other. The invention can generate an image with uniform polarizing direction.

Abstract: A polarization rotation device including a rotation shaft, a driving element, a polarization element and a reflective element is provided. The polarization element is disposed on a transmission path of the at least one excitation light beam. The reflective element is disposed on a side of the polarization element. The driving element drives the polarization element to sequentially rotate with the rotation shaft as a rotation center axis. When the polarization element rotates, the excitation light beam is transmitted to the polarization element and passes through the polarization element and is again transmitted to and passes through the polarization element by the reflective element. The excitation light beam outputting from the polarization rotation device has different polarization states at different time periods. A projection device applying the polarization rotation device of the invention achieves the effect of uniform color or brightness when displaying images in a 3D display mode.

Abstract: A composite phase conversion element and a projection apparatus are provided. The composite phase conversion element is disposed on a transmission path of at least one beam, and includes at least one polarizing element, and the polarizing element includes multiple polarizing regions, where at least two of the polarizing regions have different polarization directions, the at least one beam simultaneously penetrates through at least two of the polarizing regions of the at least one polarizing element to respectively form at least two sub-beams, and polarization states of the two sub-beams correspond to the polarization directions of the at least two of the polarizing regions penetrated by the at least two sub-beams. Therefore, in a polarized 3D mode of the projection apparatus using the composite phase conversion element, color and brightness of a display image are uniform, and a user observes a 3D display image with good uniformity.

Abstract: A polarizing rotation device including a rotation shaft, a driving element and a polarizing element is provided. The driving element is configured to drive the rotation shaft to rotate. The polarizing element is connected to the rotation shaft and is disposed on a transmission path of at least one beam, where the driving element is configured to drive the polarizing element to rotate sequentially while taking the rotation shaft as a rotation central axis, and when the polarizing element is rotated, the at least one beam penetrates through the polarizing element, and the at least one beam penetrating through the polarizing element has different polarization states at different time. Therefore, when a projection device is in a polarized stereoscopic mode, a color or brightness of a display image is uniform, and a user observes a 3D display image with good uniformity.

Abstract: An illumination system including an exciting light source module, a wavelength conversion device and a light uniforming module is provided. The exciting light source module is configured to emit an exciting beam. The wavelength conversion device is disposed on a transmission path of the exciting beam and is configured to rotate around a central axis. The light uniforming module is disposed on the transmission path of the exciting beam and between the exciting light source module and the wavelength conversion device. After the exciting beam emitted from the exciting light source module passes through the light uniforming module, the exciting beam forms a light spot on the wavelength conversion device. The energy intensity distribution of the light spot along the radial direction about the central axis is that the energy intensity is lower in the center and higher on the two sides. A projection apparatus is also provided.

Abstract: A light source module includes a plurality of light combining elements, a plurality of first light emitting elements, and a plurality of second light emitting elements. Each of the light combining elements has a first reflecting surface and a second reflecting surface. Each of the first light emitting elements emits a first illuminating beam, and one of the first reflecting surfaces reflects the first illuminating beam to be transmitted along a light combining direction. Orthographic projections of the light combining elements on a reference plane are connected in sequence, and the reference plane is perpendicular to the light combining direction. Each of the second light emitting elements emits a second illuminating beam, and one of the second reflecting surfaces reflects the second illuminating beam to be transmitted along the light combining direction. In addition, a projector having the light source module is also provided.

Abstract: A projection device includes an illumination system, a light valve, and a projection lens. The illumination system includes an excitation light source, a wavelength conversion element, a light converging lens, and a light integration rod. The excitation light source provides an excitation beam. The wavelength conversion element converts the excitation beam into a conversion beam. A greatest width in a light spot formed on the wavelength conversion element by the excitation beam is a first distance. A greatest width in a light spot formed on the wavelength conversion element by the conversion beam is a second distance. The second distance is greater than the first distance. The light integration rod receives the conversion beam from the light converging lens. The conversion beam generated by the wavelength conversion element of the invention is effectively projected to the light integration rod.

Abstract: The invention provides a projection apparatus and an illumination system. The projection apparatus includes an illumination system, a light valve, and a projection lens. The illumination system includes at least one laser light source, at least one light separating element, a wavelength conversion element, and a reflective element. The at least one laser light source is adapted to generate at least one laser beam, and the at least one laser beam is adapted to penetrate at least one first coating region of the light separating element. The wavelength conversion element is adapted to convert the laser beam from the light separating element into a converted beam. A second coating region of a reflective surface of the reflective element is adapted to reflect a portion of the laser beam from the wavelength conversion element, and the second coating region and the first coating region are adapted to reflect the converted beam. The portion of the laser beam and the converted beam constitute an illumination beam.