Abstract: An optical measurement system measuring optical parameters of an object is provided. The object includes at least two light-transmitting layers. The optical measurement system includes a light source module, an image capture module, and a controller. The light source module emits at least two measurement light beams toward the object. The measurement light beams are respectively incident on the object at different angles. The image capture module receives light spots formed on a sensing surface of the image capture module by at least two first light beams after the measurement light beams are reflected by the object and at least two second light beams after the measurement light beams are refracted and reflected between the object. The controller is electrically connected to the image capture module to obtain positions of the light spots. The controller calculates the optical parameters of the object according to the positions of the light spots.

Abstract: A three-axis voice coil motor including a base, a spherical bearing, a magnetic component, an X-coil group, a Y-coil group, and at least one Z-coil group is provided. The base has a supporting pole. The spherical bearing is rotatably sleeved around the supporting pole. The magnetic component is securely sleeved around the spherical bearing and the magnetic component rotates along with the spherical bearing. The X-coil group is disposed around the magnetic component along an X-axial direction passing through the spherical bearing, and the X-coil group has first gaps. The Y-coil group is disposed around the magnetic component along a Y-axial direction passing through the spherical bearing, and the Y-coil group has second gaps. The Z-coil group is disposed around the magnetic component along a Z-axial direction passing through the spherical bearing.

Abstract: An autofocus system includes a focus light source, an objective lens, a defocus lens, a first image sensor, and a controller. The defocus lens is disposed on the transmission path of the focus light beam, so that a minimum light point of the focus light beam passing through the objective lens deviates from a focus of the objective lens. The first image sensor is configured to receive a focus reflected light beam generated after the focus light beam is reflected by the sample. The controller is electrically connected to the first image sensor. According to a center change of gravity, a position change, or an energy change of a light spot formed by the focus reflected light beam on an image plane of the first image sensor, the controller drives the objective lens or the sample to move, so that the focus of the objective lens falls on the sample.

Abstract: An optical measurement system measuring optical parameters of an object is provided. The object includes at least two light-transmitting layers. The optical measurement system includes a light source module, an image capture module, and a controller. The light source module emits at least two measurement light beams toward the object. The measurement light beams are respectively incident on the object at different angles. The image capture module receives light spots formed on a sensing surface of the image capture module by at least two first light beams after the measurement light beams are reflected by the object and at least two second light beams after the measurement light beams are refracted and reflected between the object. The controller is electrically connected to the image capture module to obtain positions of the light spots. The controller calculates the optical parameters of the object according to the positions of the light spots.

Abstract: An autofocus system includes a focus light source, an objective lens, a defocus lens, a first image sensor, and a controller. The defocus lens is disposed on the transmission path of the focus light beam, so that a minimum light point of the focus light beam passing through the objective lens deviates from a focus of the objective lens. The first image sensor is configured to receive a focus reflected light beam generated after the focus light beam is reflected by the sample. The controller is electrically connected to the first image sensor. According to a center change of gravity, a position change, or an energy change of a light spot formed by the focus reflected light beam on an image plane of the first image sensor, the controller drives the objective lens or the sample to move, so that the focus of the objective lens falls on the sample.

Abstract: A three-axis voice coil motor including a base, a spherical bearing, a magnetic component, an X-coil group, a Y-coil group, and at least one Z-coil group is provided. The base has a supporting pole. The spherical bearing is rotatably sleeved around the supporting pole. The magnetic component is securely sleeved around the spherical bearing and the magnetic component rotates along with the spherical bearing. The X-coil group is disposed around the magnetic component along an X-axial direction passing through the spherical bearing, and the X-coil group has first gaps. The Y-coil group is disposed around the magnetic component along a Y-axial direction passing through the spherical bearing, and the Y-coil group has second gaps. The Z-coil group is disposed around the magnetic component along a Z-axial direction passing through the spherical bearing.

Abstract: An optical module and a projection apparatus using the optical module are provided. The optical module includes a base, a first frame, an optical element and at least one driving assembly. The first frame is disposed in the base. The optical element is disposed in the first frame. The at least one driving assembly is disposed between the base and the first frame. The first frame is configured to move relative to the base by a magnetic force generated by the at least one driving assembly. Each of the at least one driving assembly includes a coil and a Halbach array magnet structure, the coil and the Halbach array magnet structure face each other along a first direction, a width of the Halbach array magnet structure in the first direction is W1, and a width of the coil in the first direction is W2, and 0.7?W1/W2?2.

Abstract: An error measurement device and an error measurement method are provided. The optical measurement assembly of the error measurement device includes a light source, an optical lens, and a photoelectric sensor. The light beam emitted by the light source is transmitted to a sensing area on the photoelectric sensor to form a first optical path illuminating on a first light-spot position of the sensing area. The moving stage is moved by a linear displacement, so that the light beam is transmitted to the photoelectric sensor to form a second optical path illuminating on a second light-spot position of the sensing area. The processor calculates a movement error of the moving stage and controls the actuator to drive one or more of the light source, the optical lens, and the photoelectric sensor to perform a relative motion, so that the light beam illuminates on the first light-spot position again.

Abstract: A laser stabilizing system configured to stabilize a laser beam emitted from a laser source includes a beam steering device, a first beam splitter, a first light detector, a second beam splitter, and a second light detector. The beam steering device is configured to steer a direction and a position of the laser beam in four or more degrees of freedom. The first beam splitter is configured to split the laser beam from the beam steering device into a first partial beam and a second partial beam. The first light detector is disposed on a transmission path of the first partial beam. The second beam splitter is configured to split the second partial beam into a third partial beam and a fourth partial beam. The second light detector is disposed on a transmission path of the third partial beam. A laser source module is also provided.

Abstract: An optical module and a projector including the optical module are provided. The optical module includes a base, a first frame body disposed in the base, an optical element disposed in the first frame body, and at least one driving assembly disposed between the base and the first frame body. The first frame body is configured to swing relative to the base through a magnetic force generated by the at least one driving assembly, and each of the at least one driving assembly includes a coil and a magnetic structure that is separated from the coil and includes a magnetic permeable plate, a separation medium, and a magnet element. The separation medium is located on one side of the magnetic permeable plate facing the coil. The magnet element is disposed on the side of the magnetic permeable plate facing the coil and is separated by the separation medium.

Abstract: An error measurement device and an error measurement method are provided. The optical measurement assembly of the error measurement device includes a light source, an optical lens, and a photoelectric sensor. The light beam emitted by the light source is transmitted to a sensing area on the photoelectric sensor to form a first optical path illuminating on a first light-spot position of the sensing area. The moving stage is moved by a linear displacement, so that the light beam is transmitted to the photoelectric sensor to form a second optical path illuminating on a second light-spot position of the sensing area. The processor calculates a movement error of the moving stage and controls the actuator to drive one or more of the light source, the optical lens, and the photoelectric sensor to perform a relative motion, so that the light beam illuminates on the first light-spot position again.

Abstract: The present invention provides a multi-degree-of-freedom error measurement system for rotary axes and the method thereof. By producing a first ray, a second ray, and a third ray, the multi-facet reflector and the axicon disposed on an axis average line can receive the first, the second, and the third rays, respectively, for producing a reflective ray, a refractive ray, a first emitted ray, and a second emitted ray. Thereby, errors of the axicon in a plurality of degrees of freedom caused by shift or vibration of the axis average line, such as the x-axis radial error, the y-axis radial error, the axial error, the x-axis tilt error, the tilt error for the y-axis, and the angular alignment error for rotation can be measured.

Abstract: A multi-band antenna module is adapted to be disposed on a casing. The multi-band antenna module includes a main radiator, and a first, a second, a third and a fourth radiator. The main radiator has a feed-in terminal and a first ground terminal. The first radiator is connected to the main radiator and configured to couple a first frequency band. The second radiator is connected to the main radiator and configured to couple a second frequency band. The third radiator is connected to the main radiator and configured to couple a third frequency band. The fourth radiator is located beside the main radiator and configured to couple a fourth frequency band and has a second ground terminal. The main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are adapted to form a 3D structure along an outline of the casing.

Abstract: An optical module and a projector including the optical module are provided. The optical module includes a base, a first frame body disposed in the base, an optical element disposed in the first frame body, and at least one driving assembly disposed between the base and the first frame body. The first frame body is configured to swing relative to the base through a magnetic force generated by the at least one driving assembly, and each of the at least one driving assembly includes a coil and a magnetic structure that is separated from the coil and includes a magnetic permeable plate, a separation medium, and a magnet element. The separation medium is located on one side of the magnetic permeable plate facing the coil. The magnet element is disposed on the side of the magnetic permeable plate facing the coil and is separated by the separation medium.

Abstract: An optical module and a projection apparatus using the optical module are provided. The optical module includes a base, a first frame, an optical element and at least one driving assembly. The first frame is disposed in the base. The optical element is disposed in the first frame. The at least one driving assembly is disposed between the base and the first frame. The first frame is configured to move relative to the base by a magnetic force generated by the at least one driving assembly. Each of the at least one driving assembly includes a coil and a Halbach array magnet structure, the coil and the Halbach array magnet structure face each other along a first direction, a width of the Halbach array magnet structure in the first direction is W1, and a width of the coil in the first direction is W2, and 0.7?W1/W2?2.

Abstract: A multi-band antenna module is adapted to be disposed on a casing. The multi-band antenna module includes a main radiator, and a first, a second, a third and a fourth radiator. The main radiator has a feed-in terminal and a first ground terminal. The first radiator is connected to the main radiator and configured to couple a first frequency band. The second radiator is connected to the main radiator and configured to couple a second frequency band. The third radiator is connected to the main radiator and configured to couple a third frequency band. The fourth radiator is located beside the main radiator and configured to couple a fourth frequency band and has a second ground terminal. The main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are adapted to form a 3D structure along an outline of the casing.

Abstract: The present invention relates to a method and an apparatus for measuring errors of a movable platform in multiple degrees of freedom. A light-source module disposed on a fixed platform emits light to a lens module disposed on a movable platform. The light is reflected to one or more optoelectronic sensing module on the fixed platform via the lenses of the lens module. Then a processing unit calculates an alignment error or/and one or more straightness error or/and one or more angle error of the movable platform according to the signal generated by the optoelectronic sensing module.

Abstract: The present invention provides a multi-degree-of-freedom error measurement system for rotary axes and the method thereof. By producing a first ray, a second ray, and a third ray, the multi-facet reflector and the axicon disposed on an axis average line can receive the first, the second, and the third rays, respectively, for producing a reflective ray, a refractive ray, a first emitted ray, and a second emitted ray. Thereby, errors of the axicon in a plurality of degrees of freedom caused by shift or vibration of the axis average line, such as the x-axis radial error, the y-axis radial error, the axial error, the x-axis tilt error, the tilt error for the y-axis, and the angular alignment error for rotation can be measured.

Abstract: The present invention relates to a method and an apparatus for measuring errors of a movable platform in multiple degrees of freedom. A light-source module disposed on a fixed platform emits light to a lens module disposed on a movable platform. The light is reflected to one or more optoelectronic sensing module on the fixed platform via the lenses of the lens module. Then a processing unit calculates an alignment error or/and one or more straightness error or/and one or more angle error of the movable platform according to the signal generated by the optoelectronic sensing module.

Abstract: This disclosure provides a voice coil motor, including a magnet holder, a magnet set, a lens holder, a lens set, an upper and lower elastic piece and a circuit board. The magnet set has four magnets mounted on four sides of the magnet holder, each of the magnets having opposing N/S and S/N magnetic poles. The lens set is disposed in the lens holder. The upper and lower elastic pieces are mounted above and below the lens holder, respectively. Four focusing coil loops are disposed between the lens holder and magnet set, and correspond to the four magnets of the magnet set. Four optical image stabilization coil loops are disposed on the circuit board and correspond to the four magnets of the magnet set, respectively. The focusing coil loops and optical image stabilization coil loops share the magnet set. Therefore, the voice coil motor has a size reduced.