256-grating light head device

Abstract

The invention discloses a 256-grating light head device. The 256-grating light head device comprises a shell, a position regulation mechanism, a transducer module, a reflecting diaphragm, a reflecting mirror module and a laser module, wherein the reflecting mirror module is positioned at one end of the shell; the transducer module is arranged at the other end of the shell; the reflecting diaphragm is arranged between the transducer module and the reflecting mirror module; the laser module is arranged at one end of the upper part of the shell; the position regulation mechanism is arranged at the other end of the upper part of the shell. The response frequency of a modulator exceeds 10MHz, and the modulator is controlled by using ultrasonic waves. Compared with a device such as a grating light valve (GLV), the modulator has the advantages that a switch response speed exceeds over 10 times; ideal square light spots can be accurately generated. An ultrasonic acousto-optic modulator is applied to the industries of communication and the like for dozens of years, and is mature in production process, low in manufacturing cost and suitable for batch production.

Description

technical field [0001] The invention relates to the field of laser imaging, in particular to a 256 grating optical head device. Background technique [0002] The grating optical head of traditional fiber optic technology uses 32, 48 or 64 lasers with a power of 1W as the light source, which are coupled to the imaging lens through a corresponding number of close-packed optical fibers. This method uses a large number of lasers, is expensive, and the laser circuit The number is limited by optical fiber technology, and it can only achieve 64 channels at most. Optical fiber technology grating optical head plate making, not only the stability of plate making is low, but also can not print FM network, the quality of dots is limited, and high-quality printing plates cannot be printed. [0003] In the field of CTP, the technology that can realize more than 64 plate-making technologies currently has patents only the VCSEL technology (CN 1497272A) of Kodak Company of the United States...

AI Technical Summary

Problems solved by technology

Because this technology uses a two-dimensional modulation device, it cannot move continuously during actual work. It needs to precisely control the amount of movement, like stamping a stamp, and image the pattern on the plate piece by piece in the form of stamping. This device is severely limited. Due to the range of its use and the speed of plate making, the CTP using the DMD packaging device cannot be made into the common external drum type and internal drum type, and can only use the most primitive flat type CTP method; at the same time, the response frequency of DMD usually does not exceed several hundred Hz , which is very different from the millions of hertz required in plate making, which also greatly limits its plate making speed

[0007] The devices in the above patents all require special customization, and due to the high manufacturing difficulty, the mass production yield has not been high

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