54results about How to "Guaranteed focus" patented technology

The invention relates to a new device used for scribing and pointing of a thin film solar cell. The device comprises a laser, a support pedestal, an automatic focusing control subsystem, an automatic photographing positioning subsystem, an optical platform, an industrial control computer, a power supply and a dynamic galvanometric scanning subsystem. The device is characterized in that a feeding mechanism is arranged on the optical platform, wherein, the support pedestal, the automatic focusing control subsystem and the automatic photographing positioning subsystem are arranged on one side surface of the optical platform. An X-Y-axis galvanometric scanning unit, a Z-axis front focusing unit and the laser are arranged in a beam of the support pedestal. The industrial control computer is respectively connected with the laser, the X-Y-axis galvanometric scanning unit, the Z-axis front focusing unit and the power supply by cables. The invention has the advantages of simple structure, standard process, low production cost, easy mass production, wide scanning range, small focusing spot, good consistency, automatic and accurate positioning, high working efficiency, and the like, thereby being capable of being widely applied in scribing, pointing and other production fields of amorphous silicon solar cells.

The invention discloses a system and method for detecting the vacuum degree of a vacuum device based on a laser-induced breakdown spectroscopy. According to the method disclosed by the invention, a target material in a vacuum chamber is ablated through utilizing laser focusing so as to generate plasmas; a plasma spectrum is measured through focusing of an optical camera lens, light splitting of a spectrograph, and imaging of an image intensifier. The plasma spectrums under different air pressure environments are measured for a plurality of times and a relation between the plasma spectrum and air pressure is analyzed and found. By utilizing the relation, the air pressure of the vacuum chamber can be obtained through measuring the plasma spectrum.

The invention relates to the technical field of image photographing equipment, and discloses a camera calibration method and a camera calibration device. The calibration method comprises the steps of determining whether an image plane is overlapped with a plane in which a photosensitive unit exists; if not, adjusting the position of a lens module through a moving mechanism until the image plane is overlapped with the plane in which the photosensitive unit exists; on the condition that the image plane is overlapped with the plane in which the photosensitive unit exists, calculating a tangential value of an included angle beta between an object plane and the image plane; and on the condition that an object distance changes, calibrating the position of the lens module according to the tangential value. An embodiment of the invention further discloses a camera calibration device. Compared with prior art, the camera calibration method and the camera calibration device are advantageous in that the position of the lens module can be adjusted through a moving mechanism so that the image plane is overlapped with the plane in which the photosensitive unit exists; and furthermore the tangential value of the included angle between the object plane and the image plane is calculated; and on the condition that the object distance is changed, the position of the lens module can be calibrated according to the tangential value.

The invention discloses a bicycle vehicular advertisement system based on rotating display of LED (light-emitting diode) pixel bars. The bicycle vehicular advertisement system comprises a pixel bar display device and a control center, the pixel bar display device comprises four pixel bars, a controller and a power supply, the pixel bars are the LED pixel bars and uniformly and fixedly distributedat the outer edge of the controller, and the pixel bar display device is connected with the control center through a radio or wireless network. The system is reasonable in design, simple in structure,easy to manufacture and convenient to mount and maintain. When a bicycle is ridden at night, wheels of the bicycle can automatically display patterns, an eye-catching function can be played when propagandizing and popularizing are implemented, pattern data are wirelessly transmitted, operation of a rider is omitted, attentiveness of the rider is ensured, and riding safety is facilitated. The system is suitable for large-area advertisement injecting, public benefits of society and economic benefits of enterprises can be achieved, and the system has good popularization and application prospects.

A multipurpose micro voice coil motor, comprising: a magnet yoke body (1), a first gasket (2), an upper shrapnel (3), a coil (4), a coil frame (5), a permanent magnet (6), a second gasket (7), a lower shrapnel (8) and a base (9). The magnet yoke body (1) and the base (9) are arranged in a mutally cooperative manner, so that a closed space for accommodating the first gasket (2), the upper shrapnel (3), the coil (4), the coil frame (5), the permanent magnet (6), the second gasket (7) and the lower shrapnel (8) is formed. The magnet yoke body (1) is integrally shaped by punching with a metal material. Through the cooperation of the magnet yoke body (1) and the base (9), the number of component parts of the motor is reduced, and the manufacturing procedure of the motor is simplified.