The Research Of Theory,Experiment And Testing Technology On Enlarging MCP's Port

This dissertation introduce the compose, work principle, developments, applications of the night vision system simply. The source, characterization, calculation and testing of a variety of noise are carried out in this dissertation. The external condition and interior condition Bringing noise are analyzed. These provide theory foundation for reducing the noise of micro-channel plate (MCP) and developing the producing technique of advanced MCP.The all process of electron and photons scatter on the surface of MCP is analyzed. The ration relation between current gain, noise factor, hatch area rate of MCP is given. The theory of the relations between the hatch area rate of MCP and the current gain, signal-to-noise illuminated. To analyzing the forming process of the scatter noise, it is proved that the hatch area rate of MCP affects the scatter noise greatly. If enlarged the hatch area, the scatter noise is reduced, the numbers of photoelectrons entering the channels are increased, outputting current of signal is enhanced, the signal-to-noise and contrast are improved enormously. An example which the MCP with 8 μm aperture is expand to 9μm is performed.Adopting of the chemical etching method to enlarge the hatch of MCP is decided. Enlarging principle and craftwork steps are stated. The craftwork research has acquired protuberantly advance.At last, the measuring and evaluate technique of enlarged MCP are studied. The plane testing and evaluate systems and three dimensions solid testing system of enlarged MCP are established. Three dimensions solid testing system adopts laser scanning microscope to testing the MCP samples. And the testing results are digital photo disposed. The chart of three dimensions solid of MCP and the purify of MCP surface and portrait scan. Accordingly the figure and size of MCP are confirmed. Plane testing system includes two parts, and software. Hardware is composed with biology optics microscope, CCD pick-up head, image collecting card and PC computer. It can image observe, collection, display. The software is special designed for the image characteristic. The borderlines of the aperture in MCP are identified by the different brightness between the aperture and the glass. Finally the aperture diameter is calculated.