Final inspection of laser pointer is very important

Final inspection of laser pointer is very important.
Purports to drum in accordance with the toner on the adsorption of graphic information, cartridge charging, charging electrode is the one with the drum axis parallel to the tungsten wire, with its on 5 ~ 7kV DC high voltage, when the cartridge very close to the surface and tungsten, the surrounding air is ionized by corona discharge, so that the drum to bring the charge. Positive and negative voltage is determined by the voltage of the tungsten brought the photoconductive material for selenium tellurium alloys, the charge of positively charged, the rotation of the drum after a week so that the whole surface are charging. Charge of the drum, the laser printer specific charging method because of the different models have different, but the charging principle is basically the same, are based on the charge of the DC high voltage corona discharge on the surface of the drum. This type of laser pointer has a little frequency drift.
The laser printer of the early production of the composite structure of the electrode wire and grid charging more, most of the new laser printer charge Cots (FCR) to charge the drum. When a high-voltage high-voltage generator to the electrode wire, the formation of a strong electric field between the wire electrode and the grid, and the release of the corona. Ionize the air between the electrode wire and the drum, air ions migrate to the surface of the drum, the surface charge on the photoconductor (drum). This approach makes the photoconductor (drum) surface charge uniformity, but also produce large amounts of negative ions (ozone). Ozone gathered a certain amount of time is harmful to humans. The customer has to know the manufacture procedure of laser pointer in details.200mW red laser (650nm) with temperature control is one of the laser of laser pointer
Early products of Canon LBP-SX, ST type, the early products of Hewlett-Packard, HP2, 3 and Japan Panasonic KX6500 the Lenovo LJ6L, LJ6P and other models are using this method of charging. Most of the modern production laser printers, the roller charging, contact charging method, charging voltage, and does not require high ozone production, but due to the ionization of the accumulation of dust, increasing the wear of the drum will There are non-uniform charging of the phenomenon. Like a pen to paper and write scanning exposure tool with a laser beam exposure, this piece of text or image is not visible in the "writing" on the drum, which is what we call "electrostatic latent image . The laser pointer company has the strict rules and regulations.