Light path of CBHD blue light laser head

Abstract

The invention relates to a light path of a CBHD blue light laser head. Light rays sent by a blue light LD are at an angle of 20 degrees from a horizontal and income into a prism through a grating, the income light rays are at an angle of 45 degrees from the prism, light rays sent by a red light LD are at an angle of 110 degrees from a horizontal and income into the prism through the grating, the income light rays are at an angle of 45 degrees from the prism, the prism reflects the red light rays and the blue light rays to a 1 / 4 wave plate, the 1 / 4 wave plate is at an angle of 20 degrees from a horizontal plane, the light rays income into a semi-permeable semi-reflecting plate through the 1 / 4 wave plate, the light rays are at an angle of 70 degrees from the horizontal plane, and one part of the light rays is reflected to an astigmation plate through the semi-permeable semi-reflecting plate and incomes a PDIC through the astigmation plate so as to realize the checkout of CD signals. The invention fills up the blank of the blue light laser head in China, and can realize massive domestic production because the process of a blue light path system is simpler and the manufacture cost is lower.

Description

technical field [0001] The invention relates to a technology of a blue-ray laser head, in particular to an optical path system of a blue-ray laser head. Background technique [0002] At present, a new technology of Blu-ray laser head has appeared in the world, which is called the Blu-ray laser head of high-definition player (also known as HD-DVD laser head). High and large capacity, etc., but the design of the optical path system of the HD-DVD Blu-ray laser head that has appeared internationally is relatively complicated, the manufacturing process is very demanding, and the production cost is high. Therefore, my country currently does not have the production of HD-DVD high-definition players. Capability of the laser head. One of the important reasons is that the optical path design technology of the laser head is almost monopolized by Japan. Japan monopolizes the key components to realize the optical path design through the optical path design, and the price of the key compon...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects in the design of the existing blue-ray laser head optical path system, the present invention designs and develops a blue-ray laser head optical path system that fills the gap in my country. This is a CBHD blue-ray laser head with relatively simple processing technology and low manufacturing cost. optical path system

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