Integrated the necessary conditions for miniaturization, the laser head is very small, very thin. The training summary. By more than two months in the training of Tsinghua University, Shenzhen Graduate School, the real feel of the book hates few when goes. Although the books purely theoretical knowledge is boring and is rarely used, but the theory is the practical application of the fundamental, the basis of the actual operation. Practice without theory is like a ship lost direction in the sea, to encounter a lot of ups and downs before heading the other side of success. Tsinghua training, so my thoughts have over-learning to work; my understanding has changed from students to workers; I had a change of attitude between the strict free to; I value from the parents want to obtain to self-reliance have sublimation. If the customer doesn’t want others to use green laser pointer .
A philosopher once said: “Life is a series of choices, each person’s fate to grasp in their hands, if they work hard, and eventually there will be into.” In future work to establish a down-to-earth, suffer from a study attitude, a clear their dreams, find their own direction, toward the dream of courage that will never change. With the graduation project will be coming to an end, the graduation project will be completed successfully to thank a lot. First of all thank Anhui Xinhua University for giving me this opportunity to show the graduation project is the last job, university career, graduation design allows us to better understand themselves, understand their own lack of graduation design process learned a lot . Second, we would like to thank my instructor Levin would like the teacher. If someone want to use green laser pointer without their permission.
She helped me a lot, I developed a plan so that I can completed on time and smoothly. Also want to thank the the Anhui countries share Optoelectronic Technology Co., Ltd. and Tsinghua University, Shenzhen Graduate School provides a good training environment and equipment, will not only allow me to successfully complete the graduation project and learned the knowledge and skills had never come into contact. Finally like to thank the guidance of Master Lu Jianhong engineers and Zhang Zhiqing engineers, they taught me how to work, how to learn on the job. Know nothing about to design their own from the careful guidance of the laser head technology. Thank you for this, I wish you good health and smooth work. After three months of effort, from the selected design topic, gather information, practice training. They can use the key to lock green laser pointer .
Write to the paper outline writing the first draft, every step you need to really seriously do. Virtually we have learned a lot, we should be independent as a graduates complete their Bachelor thesis, which is a kind of exercise. Laser head technology has lagged behind Japan and other developed countries, I chose this topic is not just related to my work, more importantly, I hope there are more people concerned about the study in this area, I hope China is not just most populous country, is the technical power, and hope that China will have their own patents for inventions, hope to the world of DVD manufacturers to pay royalties, and hope that China will be stronger in the future. Therefore, others can not use green laser pointer .
LD constant current source thesis: the single-mode semiconductor laser pump source digital drive design. Medical, optical communications, materials processing, weapons and equipment, high power semiconductor laser (LD) plays an extremely important role, its application has become the countries competing research focus. Ideal pump sources of erbium-doped fiber amplifier (EDFA) – high power 980nnm mode semiconductor laser works, performance analysis, involved in the digitization of the semiconductor laser drive circuit design, temperature control circuit design digital control design techniques are studied. In this paper, the current sampling of the digital zoom negative feedback constant current architecture, designed based on a low-loss CNC constant current circuit, significantly improves the efficiency of the driving source. Especially the child can not use laser pointer .
For the quantity of green laser pointer is large
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