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Internal-drum imaging device

An imaging device, an inner drum technology, which is applied to photosensitive materials, instruments, and patterned surface photoengraving processes for optomechanical equipment, etc. problems, to achieve the effect of improving quality

Active Publication Date: 2012-01-04
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the research and practice of the prior art, the inventors of the present invention have found that during the scanning imaging process, the rotating mirror needs to be rotated at a high speed, however, since the light rays will deviate due to the vibration generated by the high-speed rotation of the rotating mirror, the It often happens that the actual exposure position of the laser beam refracted by the rotating mirror deviates from the ideal exposure position, which affects the quality of the image

Method used

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  • Internal-drum imaging device

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Embodiment 1 of the inner drum imaging device of the present invention: reference figure 1 , the drum imaging device in this embodiment includes:

[0014] An imaging drum 1, an imaging surface 2 placed on the inner surface of the imaging drum 1, and an exposure head 3 for exposing the imaging surface 2 with a modulated light beam corresponding to image information of an image to be imaged.

[0015] The swing mechanism is used to carry the exposure head 3 to rotate around the axis A of the imaging drum 1 (shown in the Y direction in the figure), so that the exposure head 3 performs scanning exposure on the imaging surface 2 along the circumferential direction of the imaging drum 1 .

[0016] The linear motion mechanism is used to carry the exposure head 3 and the swing mechanism to move along the axial direction of the imaging drum 1 (shown in the X direction in the figure).

[0017] Wherein, the swing mechanism includes a swing arm 9 , a bearing 7 , a bearing clamping ...

Embodiment 3

[0027] Embodiment 3 of the inner-drum imaging device of the present invention: this embodiment is similar to Embodiment 1 of the inner-drum imaging device of the present invention, the difference is that in this embodiment, it is used to adjust the exposure head along the imaging drum on the swing arm The adjustment mechanism for radial movement is a manual adjustment mechanism, which may include guide rails and micrometers. The exposure head 3 is arranged on the sliding block of the guide rail, and is connected with the movable head of the micrometer at the same time, and the radial distance of the exposure head 3 can be adjusted by adjusting the micrometer. Generally, the thickness change of the printing plate requires radial adjustment. This method can be applied to occasions where the thickness of the printing plate used in production does not change frequently.

[0028] In addition, in order to obtain the swing angle of the exposure head, in each embodiment of the inner d...

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Abstract

The invention relates to the technical field of computer-to-plate, and discloses an internal-drum imaging device. The device comprises an imaging drum, an imaging surface which is arranged on the inside surface of the imaging drum, and a photohead which exposes the imaging surface through a modulated light beam corresponding to image information of an image to be imaged. The device also comprisesa tilting mechanism and a straight-line motion mechanism, wherein the tilting mechanism is used for carrying the photohead to rotate by taking a shaft of the imaging drum as a center, so that the photohead carries out scanning exposure on the imaging surface along the circumferential direction of the imaging drum; and the straight-line motion mechanism is used for carrying the photohead and the tilting mechanism to move along the axial direction of the imaging drum. The embodiment of the invention can avoid the problem that an actual exposure position of a laser beam which is refracted by a rotary mirror is deflected from an expected exposure position so as to improve the imaging quality.

Description

technical field [0001] The invention relates to the technical field of computer-to-plate (CTP), in particular to an inner-drum imaging device. Background technique [0002] In recent years, CTP technology has received extensive attention and application. The so-called computer-to-plate is to use a computer to digitally process and edit the original text and image, scan and image directly on the printing plate, and then make a printing plate through post-processing processes such as developing and fixing or without post-processing. The scanning imaging process is usually: a single original laser beam generated by a laser is split into multiple beams (usually 200-500 beams) of extremely fine laser beams through a multi-channel optical fiber or a complex high-speed rotating optical beam splitting system. After the light is modulated by the acousto-optic modulator according to the brightness and darkness of the image information in the computer, the light and dark changes of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/09G03F7/00
Inventor 高云峰孙海翔刘坚
Owner HANS LASER TECH IND GRP CO LTD