Abstract: Coolant vapor pressure is used to generate a push force to adjust the azimuth angle of a solar panel without using a dedicated power supply.

Abstract: A first coolant tank is arranged on first side of a solar energy collecting panel, a second coolant tank is arranged on second side of the solar energy collecting panel. A first wall is arranged beside the first coolant tank, a second wall is arranged beside the second coolant tank. When the sun shifts, one of the coolant tanks is covered partially by one of the walls and hence receives less heat than the other. The pressure difference between the two coolant tanks is used to adjust the solar energy collecting panel so that the panel tracks the sun to receive maximum heat.

Abstract: A detector is used on a solar panel to detect the strength of the wind blowing at it. A height-adjustable support decreases the height of the solar panel, based on the wind strength detection, for protecting the solar panel from potential damages caused by strong winds.

Abstract: The present invention discloses an XY platform device with nanoscale precision including an optical pickup head for focusing and seeking the tracks of an optical data storage medium; a servo device for driving the optical pickup head to move in focusing and radial directions; a carrier platform for receiving a testing object thereon and providing a connecting member to be connected with the optical pickup head. With the focusing and radial movements of the optical pickup head, the carrier platform is driven to move accordingly, and thus achieving the high-precision and low-cost effects.

Abstract: The present invention discloses an XY platform device with nanoscale precision including an optical pickup head for focusing and seeking the tracks of an optical data storage medium; a servo device for driving the optical pickup head to move in focusing and radial directions; a carrier platform for receiving a testing object thereon and providing a connecting member to be connected with the optical pickup head. With the focusing and radial movements of the optical pickup head, the carrier platform is driven to move accordingly, and thus achieving the high-precision and low-cost effects.

Abstract: An apparatus and method for compensation of central wavelength shifting of a fiber grating by material with Invar effect. In the present invention, a substrate having a negative thermal expansion coefficient and a fiber with fiber grating is provided, and two portions of the fiber at both sides of the fiber grating are fixed to the substrate. The substrate and the fiber are satisfied with ?eff?bragg=K?AfEf(?c??f) in which ?eff is an effective thermal expansion coefficient of the fiber grating, ?bragg is a Bragg wavelength, K? is a constant, Af is a cross-section area of the fiber, Ef is an elastic modulus of the fiber, ?c is the negative thermal expansion coefficient of the substrate, and ?f is a thermal expansion coefficient of the fiber.

Abstract: An apparatus and method for compensation of central wavelength shifting of a fiber grating by material with Invar effect. In the present invention, a substrate having a negative thermal expansion coefficient and a fiber with fiber grating is provided, and two portions of the fiber at both sides of the fiber grating are fixed to the substrate.

Abstract: An automatic device for assembling a fiber collimator. The fiber collimator includes a transparent tubular holder, an optical fiber having a first end surface disposed at an end of the tubular holder, and a GRIN lens having a second end surface disposed at the other end of the tubular holder. The automatic device includes an image pick-up device, a processor, a first driving table for rotating and moving the optical fiber, and a second driving table for rotating and moving the GRIN lens. The image pick-up device films the first and second end surfaces, and outputs image data corresponding to the first and second end surfaces. The processor receives and processes the image data to control the first and second driving table to rotate so that the first and second end surfaces are parallel to each other, and control the first and second driving table to move so that a distance between the first and second end surfaces is equal to a predetermined value.