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Optical system in the duplicator

Sep. 05, 2020

The working principle of photocopiers mainly includes electrostatic principle, optical imaging principle and semiconductor principle. Using the potential characteristics of the photoconductor, the photoconductor is charged in a state where the photoconductor is not illuminated, so that the surface is charged with a uniform charge, and then the original image is imaged on the photoconductor through optical principles. The photosensitive drum accurately forms an electrostatic latent image by performing electrostatic charge distribution with or without an image. Finally, through the electrostatic principle, the electrostatic latent image on the surface of the photoconductor is first transformed into a toner image on the surface of the photoconductor, and then transferred to the surface of the paper.

The optical imaging system is mainly composed of an exposure lamp, aluminum reflectors, and optical lenses. The original image is reflected on the photosensitive drum by aluminum mirror and optical lenses, forming an electrostatic image on the photosensitive drum. The optical lenses capture and recognize the image and aluminum mirrors transmit the image and changes the light path.

Digital duplicating machines use CCD image sensors in the image exposure system. The image sensor CCD converts the light image into an electrical signal. Digital duplicating machines use laser printing during the copying process. The output image signal of the CCD sensor is processed to modulate the laser. The laser uses the laser beam to image on the photosensitive drum. The use of print data storage can realize once scan and multiple printing, which can greatly improve the printing speed and quality.

The laser exposure system is produced by a semiconductor laser or a gas laser. It has the characteristics of clear color, high precision, long life, and easy control. The laser transmitter is fixed in the machine, and the direction of the laser beam emitted by it is constant, while the orientation of the laser mirror changes. The projection angle of the laser beam is changed due to the change in the orientation of aluminum mirrors. The laser beam reflected by aluminum mirrors will change. Aluminum mirrors is driven by the motor to rotate, so that the line-by-line arrangement forms a surface. The original image forms an electrostatic latent image on the surface of photosensitive drum.

CLZ Precision Optics  Co., Ltd. provides you with custom aluminum mirrors and optical lenses for duplicating machines. At the same time, our company also produces and processes other optical components, such as optical domes and optical windows. If you need related optical components, please contact