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Method and device for realiznig multiple light path automatic balance regulation in laser phototypesetting

An automatic balancing and multi-optical path technology, which is applied in the field of multi-optical path scanning optical equipment, can solve problems such as time drift, temperature drift, light spot imbalance, and transfer coefficient difference that cannot adapt to LD, so as to solve the problem of power imbalance and improve Scanning imaging accuracy, the effect of overcoming Moiré fringe phenomenon

Inactive Publication Date: 2005-03-02
深圳市东方宇之光科技股份有限公司
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Problems solved by technology

However, this method has the following two disadvantages: one is that it cannot adapt to the time drift and temperature drift of LD (the latter affects more); Coefficient difference, when a new optical power value is given, a new imbalance will appear in the light spot and must be readjusted

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  • Method and device for realiznig multiple light path automatic balance regulation in laser phototypesetting
  • Method and device for realiznig multiple light path automatic balance regulation in laser phototypesetting
  • Method and device for realiznig multiple light path automatic balance regulation in laser phototypesetting

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Embodiment Construction

[0021] The present invention is mainly used in the multi-channel light scanning imaging system in the laser phototypesetting, aims to propose a fully automatic, real-time adjustment scheme controlled by a computer, in order to solve the problems in the conventional method (see figure 1 ). The core idea is to switch the regulating circuit between two states: either a calibration state or a scanning state. In the calibration state, the photoelectric sensor is used to detect the optical power behind the mirror, and the outgoing beam will be aimed at the photoelectric sensor. The single-chip computer selects the power control unit of each light in turn through the address decoder, and lights up the light. At the same time, the photoelectric sensor collects the light intensity of the road, compares it with a given value, and sends a signal that is greater than or less than to the computer. Based on this, the computer resets the unit through the data bus - either decreases or incr...

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Abstract

The method and device for realizing automatic balance regulation of several light paths is mainly used in multiple light path scanning imaging system in laser phototypesetting. The method includes setting each of the light power control unit in either calibration state or scanning state; setting switching circuit for switching between the two states; and performing automatic real-time detection and regulation of the light power control units in calibration state circularly with computer. The device for the said method includes monochip computer, address decoder, digital comparator, photoelectric sensor, lens, linear fiber array, light conducting fiber, power control unit and print drive bus. The present invention balances power of the light paths, eliminates moire fringe, and raises the scanning imaging precision of laser phototypesetting system.

Description

technical field [0001] The present invention relates to an optical device for multi-optical path scanning (such as a laser phototypesetting machine and a laser photoplotter), and mainly refers to a method and a device for realizing automatic balance adjustment of multiple optical paths in laser phototypesetting. Background technique [0002] In the optical equipment that adopts multi-light path scanning (such as laser imagesetter, laser photoplotter), the power consistency of each light on the image plane has a key influence on lines and images. Especially when the laser imagesetter outputs a grayscale image, if there is a power fluctuation between the various lights, the size of the scanning point will also fluctuate accordingly, and the fluctuation period is the width of the multiple lights. The periodic fluctuation of the scanning point size is bound to interfere with the grid-hanging period of the grayscale image, resulting in Moiré fringes in the output image. This is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41B19/00G01J1/00H04N1/04
Inventor 刘晓东
Owner 深圳市东方宇之光科技股份有限公司
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