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.

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.

Abstract: A springless voice coil actuator is provided. The springless voice coil includes a base, a coil, a guiding rod, a slidable base, a main magnetic component and a balance magnetic component. The coil is disposed on the base. The guiding rod is disposed on the base. The slidable base is for sliding along the guiding rod to a predetermined direction. The main magnetic component is connected to the slidable base. The balance magnetic component is coupled with the main magnetic component for generating a magnetic induction.

Abstract: A high capacity power transformer (1) includes a housing (3) having top and bottom ends. A top board (32) extends outwards from four sides of the top end of the housing (3). A bottom board (33) extends outwards from four sides of the bottom end of the housing (3). A frame (4) is connected between each of four sides of the top board (32) and a corresponding one of four sides of the bottom board (33). An outer wallboard (5) envelops and is fixed to each frame (4). A sound absorbing material layer (6) is mounted to an inner face of each outer wallboard (5) facing the housing (3). The sound absorbing material layers (6) are connected to each other and surround four sides of the housing (3). The outer wallboards (5) are connected to each other and surround the four sides of the housing (3).

Abstract: A loop antenna adapted for a communication device is provided. The loop antenna includes a feed, a ground, a circular loop, at least one first tuning element, and at least one second tuning element. The circular loop is connected to the feed and the ground. The first tuning element is extended from the circular loop and corresponds to a first frequency band. The second tuning element is extended from the circular loop and corresponds to a second frequency band. Bandwidths of the first frequency band and the second frequency band of the loop antenna are changed by adjusting the first tuning element and the second tuning element, respectively.

Abstract: An open-loop GPS antenna configured on an insulation object is provided. The open-loop GPS antenna includes a feed, a high frequency circuit, a low frequency circuit and a ground. The high frequency circuit includes a first end, connected to the feed, and a second end. The low frequency circuit includes a third end and a fourth end. The third end is disposed parallel to the second end so as to couple to the second end and generate a capacitance effect to transmit a signal. The fourth end is connected to the ground.

Abstract: A tunable antenna including a first radiation element, a shorting element, a feeding element, and an impedance matching circuit is provided. The first radiation element provides a first resonant path, so that the tunable antenna covers a first band. The first band includes a plurality of sub-bands. The shorting element is electrically connected to the first radiation element and has a ground point. The feeding element is electrically connected to the first radiation element and has a feeding point. The impedance matching circuit is electrically connected to the shorting element and adjusts impedance of the tunable antenna according to a control signal, so that the tunable antenna is switched between the sub-bands.

Abstract: An automatic focusing apparatus and a method thereof are provided. The apparatus includes a light source, an optical imaging unit, a photo-sensor and a focusing regulation unit. The optical imaging unit includes an object lens and a beam splitter. The beam splitter divides a reflecting beam into a first sub-beam and a second sub-beam. The optical imaging unit has a first imaging optical path and a second imaging optical path with different imaging precisions corresponding to the first sub-beam and the second sub-beam, respectively. The photo-sensor detects a defocus position of the object. The focusing regulation unit adjusts the distance between the object and the object lens and selects an imaging precision, so that the defocus position of the object is placed within the imaging precision of the first optical path and the imaging precision of the second optical path in sequence.

Abstract: A springless voice coil actuator is provided. The springless voice coil includes a base, a coil, a guiding rod, a slidable base, a main magnetic component and a balance magnetic component. The coil is disposed on the base. The guiding rod is disposed on the base. The slidable base is for sliding along the guiding rod to a predetermined direction. The main magnetic component is connected to the slidable base. The balance magnetic component is coupled with the main magnetic component for generating a magnetic induction.

Abstract: An open-loop GPS antenna configured on an insulation object is provided. The open-loop GPS antenna includes a feed, a high frequency circuit, a low frequency circuit and a ground. The high frequency circuit includes a first end, connected to the feed, and a second end. The low frequency circuit includes a third end and a fourth end. The third end is disposed parallel to the second end so as to couple to the second end and generate a capacitance effect to transmit a signal. The fourth end is connected to the ground.

Abstract: A loop antenna adapted for a communication device is provided. The loop antenna includes a feed, a ground, a circular loop, at least one first tuning element, and at least one second tuning element. The circular loop is connected to the feed and the ground. The first tuning element is extended from the circular loop and corresponds to a first frequency band. The second tuning element is extended from the circular loop and corresponds to a second frequency band. Bandwidths of the first frequency band and the second frequency band of the loop antenna are changed by adjusting the first tuning element and the second tuning element, respectively.

Abstract: A system and method for evaluating cardiovascular performance in real time and characterized by conversion of a surface potential into multi-channels are introduced. The system includes an electrocardiographic signal measuring unit, a reconstruction unit, and a parameter computation and assessment unit. The reconstruction unit reconstructs electrocardiographic signals (ECG signals) recorded by the electrocardiographic signal measuring unit, such that the ECG signals are reconstructed as ones located at different spatial positions but actually not having a channel. The method includes calculating a variation manifested spatially during an interval between a Q wave and a T wave of an ECG signal against time with a parameter computation and assessment algorithm, to evaluate its discreteness degree and thereby diagnose cardiovascular diseases (CVD) and locate lesions thereof.

Abstract: A system and method for evaluating cardiovascular performance in real time and characterized by conversion of a surface potential into multi-channels are introduced. The system includes an electrocardiographic signal measuring unit, a reconstruction unit, and a parameter computation and assessment unit. The reconstruction unit reconstructs electrocardiographic signals (ECG signals) recorded by the electrocardiographic signal measuring unit, such that the ECG signals are reconstructed as ones located at different spatial positions but actually not having a channel. The method includes calculating a variation manifested spatially during an interval between a Q wave and a T wave of an ECG signal against time with a parameter computation and assessment algorithm, to evaluate its discreteness degree and thereby diagnose cardiovascular diseases (CVD) and locate lesions thereof.

Abstract: The present invention relates to a method for analyzing bio-signal instantaneously by Chaotic Phase Space Difference (CPSD) operation and its measure analyze device. This method includes time-delay procedure and rebuilt phase space matrix to calculate complexity of phase space matrix and diagnose the bio-signal. This method can also be used as an analyze method in portable device or 24 h ECG recorder which is a fast and convenient measure analyze device.

Abstract: An automatic focusing apparatus and a method thereof are provided. The apparatus includes a light source, an optical imaging unit, a photo-sensor and a focusing regulation unit. The optical imaging unit includes an object lens and a beam splitter. The beam splitter divides a reflecting beam into a first sub-beam and a second sub-beam. The optical imaging unit has a first imaging optical path and a second imaging optical path with different imaging precisions corresponding to the first sub-beam and the second sub-beam, respectively. The photo-sensor detects a defocus position of the object. The focusing regulation unit adjusts the distance between the object and the object lens and selects an imaging precision, so that the defocus position of the object is placed within the imaging precision of the first optical path and the imaging precision of the second optical path in sequence.

Abstract: An illumination system including a light source and a magneto-optical device is provided. The light source is adapted to emit a beam, and at least a part of the beam is polarized. The magneto-optical device is disposed in a transmission path of the beam and includes a plurality of magneto-optical material units. The magneto-optical material units are adapted to be disposed in the transmission path of the beam, and at least a part of the magneto-optical material units has different optical rotation. The magneto-optical device is adapted to move so as to make the magneto-optical material units move with respect to the beam.

Abstract: The present invention provides a photoelectric device, including a photoelectric semiconductor thin film having a light facing surface and a back light surface; and a photoelectric converter having a medium and photoelectric converting particles mounted on the medium, wherein the photoelectric converter is disposed at an outer side of the light facing surface of the photoelectric semiconductor film for absorbing and converting solar energy so as to enhance photoelectric conversion efficacy. The photoelectric converter absorbs the wavelength that the photoelectric semiconductor thin film cannot absorb, and emits the frequency band that the photoelectric semiconductor thin film can absorb. Thus, the photoelectric device of the present invention decreases the interference of light absorption, increases the light emission, eliminates the wastes of incident light, and increases the photoelectric conversion efficacy.

Abstract: The present invention relates to a method for analyzing bio-signal instantaneously by Chaotic Phase Space Difference (CPSD) operation and its measure analyze device. This method includes time-delay procedure and rebuilt phase space matrix to calculate complexity of phase space matrix and diagnose the bio-signal. This method can also be used as an analyze method in portable device or 24 h ECG recorder which is a fast and convenient measure analyze device.