Method for realizing multiple path optical scanning using single mode optical fiber

A single-mode optical fiber and optical scanning technology, which is applied in phototypesetting devices, printing, phototypesetting devices, etc., can solve problems such as unsatisfactory spot shape, difficulty in consistent spot shape, difficulty in meeting scanning quality requirements, etc.
CN1586889AInactive 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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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市东方宇之光科技股份有限公司
Publication Date
2005-03-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The method of realizing multipath light scanning with single-mode fiber includes setting closely arranged linear fiber array obliquely and setting the object plane in proper position behind the window to makes it possible to closely contact light spots via adapting circuit. The circuit part includes monostable delay counter A, trigger D, bit frequency divider U3, first-in-first-out asynchronous read / write queue memory FIFO, etc. The key point of the present invention is to utilize the characteristic that the outgoing light beam of single-mode fiber in the object plane has expanded diameter but complete edge to realize the close contact of light spots and the uniformity of different light spot modes and to reach light spot array quality much higher than that of multi-mode fiber.
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Description

technical field

[0001] The invention relates to the optical fiber close-arranged line array technology in a laser phototypesetting system, mainly referring to a method for realizing multi-path light scanning with a single-mode optical fiber. Background technique

[0002] One of the methods to realize multi-channel light scanning in laser phototypesetting machine and laser photoplotter is to use semiconductor laser as the primary light source, couple it into the optical fiber, and then arrange the optical fiber into a multi-line array as the secondary light source.

[0003] At present, multimode optical fibers are used to achieve close packing. Because the multimode optical fiber has a suitable diameter of the light export window, it is easy to realize the tight connection of the light spots. The inner diameter (light export window) of commonly used multimode fiber is generally 62.5um or 50um, and the outer diameter is 125um. There are two ways to achieve tight connection: ...

Claims

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