Light source module for multic kinds of light dicks

Abstract

The invention relates to a light source module able to be applied to multiple CDs, mainly comprising at least three light sources and an optical coupling component, where these light sources can generate light beams of different wavelengths corresponding to CDs of different specifications; and the optical coupling component comprises a substrate and a light waveguide tube formed in the substrate and the light waveguide tube further comprises at least three incoming parts and an outgoing part, where each incoming part has incoming ends corresponding to the light sources and the outgoing part has an outgoing end. The light beams generated by the light sources can all enter from their corresponding incoming ends and outgo from the outgoing part. And any two parts of the light waveguide tube can be coupled into an output part, any one part of which makes an included angle greater than 90 degrees with the output part. The invention has the advantages of low optical loss and easy manufacturing.

Description

【Technical field】 [0001] The invention relates to a light source module applicable to various optical discs, in particular to a light source module using optical waveguide coupling technology. 【Background technique】 [0002] In recent years, with the development of optical information, discs of various specifications such as CD (Compact Disc), VCD (Video-CD), DVD (Digital Versatile Disc), HD-DVD (High Definition-DVD) and Blu-ray Disc have appeared. . Since the wavelengths of the reading / recording beams of these optical discs are different, light sources that can generate different wavelengths are required. Therefore, the optical pickup head of an optical drive can integrate multiple light sources that generate different wavelengths, so that the optical drive can be used for a variety of optical discs. It will be a very convenient design to read / record discs with different specifications. [0003] The optical pickup head is the key component of an optical drive, which uses ...

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Problems solved by technology

[0005] However, the above-mentioned light source module coupled with a pentagonal prism has the following problems: First, because each light source is arranged independently and separately, and the pentagonal prism itself is relatively large, the light source module is relatively large, which makes the optical reading head relatively large; Second, the light beam is reflected and refracted multiple times in the pentagonal prism, resulting in a large loss of light, which affects the performance of reading / recording discs

[0007] However, the above-mentioned light source module has the following problems: first, there is a small distance between the output ends of the three optical waveguides, which makes manufacturing difficult; The optical path after the light beam exits is slightly deviated, and the output light loss of the side branch optical waveguide is relatively large, which affects the performance of reading / recording the optical disc

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