Two researchers from the University of Clemson received US $ 3.2 million in US Department of Defense funding for research and development of military 10000mw laser weapons systems to meet actual battlefield application requirements. The two researchers were John Ballato and Lin Zhu, who are currently trying different ways to improve the beam quality of high-power semiconductor lasers.
John Ballato focuses on the improvement of light performance, he is looking for fiber materials that will not reduce the laser. Has been manufactured to meet the basic performance requirements of the fiber, follow-up will continue to optimize to meet the next generation of high-power laser system requirements. And Lin Zhu is more focused on improving the efficiency of laser pumping, and thus create a strong direction of the laser beam. Although their projects are carried out separately, but for the green laser pointer power boost are actively trying. This will also promote the application of high-power lasers, whether in the military or in the industrial sector.
For the metal processing wavelength for the infrared band, in order to expect high-power high-calorie to work on the processing of metal, but its infrared or visible light is usually generated by high-brightness local heating of the material gasification, melting way to process. But this heat will lead to the high power laser effect of the surrounding area of the material affected or even destroyed, thus limiting the processing edge quality and industrial applications. The UV laser is a short-wavelength high-energy photon laser, the role of the material is a direct destruction of the atomic components of the chemical bonds, without heat, so the general UV laser processing known as "cold" processing.
Of course, in the femtosecond time scale, it is impossible to observe the change of the energy state of electrons directly. Therefore, the scientists by measuring the material to reflect the change in light to achieve the purpose of indirect observation - first with high-power laser pulse irradiation material, causing the material state changes, lag after a period of time after the launch of a weak laser pulse and the reflected light measurement. The energy of the first strong laser will quickly heat the material, while the reflection of the photon changes. And when the material begins to cool, the reflection begins to move closer to the normal value. Therefore, scientists can according to the reflected light to infer the dynamic state of the material changes. When the weak red laser pointer irradiation material, the material surface of some of the electrons will be ejected, scientists use electron microscopy to collect these electrons and the formation of images. In the case of weak laser irradiation, these electrons will gradually accumulate and eventually form a photo that reflects the electron distribution inside the material.
UV laser applications in the rise of smart phones, but also gradually have the development of space. In the past because the phone is not much function, and the high cost of laser processing, laser processing in the mobile phone market occupies the status is not much, but now the smart phone function, integration is high, in a limited space to integrate the number Ten kinds of sensors and hundreds of functional devices, and the high cost of components, so for precision, yield and processing requirements are greatly increased, UV laser in the mobile phone industry to develop a variety of applications.
Ceramics in the history of mankind has always occupied an important role, from daily necessities, decorative supplies to industrial applications, can see its footprint. In addition to the traditional ceramic processing technology, ceramic processing is also due to the increase in the number of applications, and then enter the use of ceramic processing technology, the use of ceramic materials, The field of burning laser pointer processing. According to the type of ceramic materials can be divided into functional ceramics, structural ceramics and bioceramics. Can be used for processing ceramic laser CO2 laser, YAG laser, green laser, etc., but with the components gradually miniaturization, and YAG laser or fiber laser processing has been unable to meet its requirements, so UV laser processing to become the necessary processing methods, He can be a variety of ceramic processing.
In recent years, high-power high-beam quality of the laser in the line of materials processing industry applications have been rapid development, a wide range of lasers: different structures are divided into gas laser, solid laser, fiber laser, semiconductor 5mw laser pointer materials to support the mainstream of the processing industry; From far infrared to deep ultraviolet can cover (200nm ~ 20um), different industries will also use a different power range, different beam quality, different laser output and so on. In order to reduce the thermal effect in the field of processing thin film non-metallic materials, semiconductor wafer cutting, plexiglass cutting, drilling, marking and other fields, it is hoped that the small aperture effect and the high peak power, the role and position of the ultraviolet laser is so good and not alternative.
Imagine, 100 years ago today, the hustle and bustle of the market was surrounded by two people, one is holding the knife, a hand-held burning laser pointer engraving machine, cheering together, knife and light at the same time aligned a piece of flat wood, The same graphics, the time comes, the results of laser engraving machine victory. From the laser era was opened!
Laser engraving process is the use of numerical control technology to laser processing medium, making the processing of materials under the laser irradiation instantaneous melting and gasification of the physical denaturation, to process the purpose. No contact with the material surface, free from mechanical movement, the surface of the material will not be deformed, generally do not need to be fixed. From the flexibility of the material, the impact of flexibility to facilitate the soft material. Processing high precision, fast, wide range of applications. And the high power laser pointer can not only on the surface of a variety of fabrics, leather, synthetic materials, personalized laser engraving drilling processing, but also professional custom tailoring models, so that cutting and carving, marking process in the same device to complete, Processing efficiency, improve the value-added products.
Every time there is always a group of people, they chase the speed, chasing the extreme. The laser technology to promote sculpture technology reform, and constantly challenge the limits of time and style. The use of laser engraving, just as the use of computers and printers to print on paper. The only difference is that printing is the toner coated paper, and laser engraving is the laser irradiation on wood products, acrylic, metal plates and other materials, so that the graphics in an instant!
LEXUS Lexus engineers through a number of careful steps, high-quality wood into thin slices, high-precision grinding through the aluminum plate and wood as one, and then electronically controlled 100mw laser pointer ablation of wood surface, light, the wood as a gray , Blooming a gorgeous metal texture, engraved under the new Lexus RX unique artistic taste.
As the country in the policy layer of 3D printing constantly overweight, intelligent manufacturing, aerospace, medical and other fields are in the development of 3D printing technology, China 3D printing industry is about to take off. In China, the distribution of 3D printing industry to Beijing and Tianjin as the representative of the most potential in North China is expected to lead the country.
The State Council issued the "13th Five-Year Plan of National Science and Technology Innovation" signed and approved by Premier Li Keqiang, which clearly put forward the guiding ideology, general requirements, strategic tasks and reform measures of the national scientific and technological innovation in the next five years. 2025 and 3D printing (by material manufacturing). For example, in Chapter 4, Article 2, Article 3, Science and Technology Innovation 2030 - Major Projects: Smart Manufacturing and Robots. (3D) printing and other equipment, to lay a solid foundation for the protection of manufacturing capacity, to build a network of collaborative manufacturing platform, research and development of intelligent robots, high-end complete sets of equipment, 3D (3D) printing equipment, intelligent, efficient, collaborative, green and safe development. In the fifth chapter of the third development of intelligent green service manufacturing technology and Article 10 mentioned: the development of robots, intelligent perception, intelligent control, micro-nano manufacturing, complex manufacturing systems and other key technologies, the development of major intelligent equipment, optoelectronic manufacturing equipment , Intelligent robots, by material manufacturing, laser pointer manufacturing and other key equipment and technology to promote the intelligent development of manufacturing.
In the manufacture of high-performance materials: to carry out high-performance metal structure laser material manufacturing control and other basic theoretical research, capture high efficiency and high precision laser material manufacturing cladding nozzle and other core components, research and development of metal, non-metallic and biological printing of typical process equipment , To build a relatively perfect material manufacturing technology innovation and research and development system.
According to Prospective Industry Research Institute statistics, 2015 global 3D printing industry market size reached 5.165 billion US dollars, the annual compound growth rate of more than 30%. Agency is expected, the global 3D printing market is showing rapid growth, by 2018, the market size will be more than 11 billion US dollars. 2012 China 3D print market size of about 1 billion yuan in 2013 doubled to 20 billion yuan. China's 3D printing market in 2015 reached 7.8 billion, the annual compound growth rate of nearly 70%. Expected to 2018, China's 3D printing market size will be more than 20 billion yuan.
In fact, although China's 3D printing industry has national policy support and rapid development, but in fact the industrialization is still in its infancy. 3D printing applications in China is still mainly stay in the research stage, did not realize the industrial and personal consumption in the field of large-scale promotion. In addition, the development of China's 3D printing market layout also presents the trend of regional imbalance. Since 2000, China began to get involved in the field of 3D printing, after more than ten years of industry accumulation, China's 3D printing industry is now gradually formed in coastal cities, led by the East China 3D printing industry development center, represented by Beijing and Tianjin, 3D printing industry development center in North China And Guangdong as the representative of the South China 3D Printing Industry Development Center, as well as central, southwest, northeast, northwest and other fragmented development area. Among them, the East China and North China two development centers occupy 60% of the domestic market share, while the Beijing and Tianjin as the representative of the North China Development Center in recent years leading trend, the future or will dominate the Chinese 3D printing market.
To Tianjin, for example, 3D printing industry in Tianjin Intelligent Manufacturing Science and Technology major projects to support the major projects, and has nearly 10 years of development history. At present, Tianjin has a certain foundation in 3D printing materials, green laser pointer cladding, light-curing rapid prototyping complete sets of equipment and technology, etc. Its overall size of 3D printing industry is close to 500 million yuan.
The day before the researcher Dr. Zheng Mingbin College of medicine of Guangdong Medical University and Chinese Academy of Sciences, Shenzhen Institute of advanced technology Cai Lintao cooperation, in the homologous drug loaded nano to make new breakthroughs and accurate visualization for cancer treatment, the development of "new treatment of cancer, cancer research recently in the field of Nanotechnology" ACS Nano "top journals published.
Zheng Mingbin, the research team constructed the encapsulation of indocyanine green (ICG) - cancer cell membrane biomimetic polymer nanoparticles (ICNPs), and applied to the diagnosis and treatment of breast cancer by homologous MCF-7. The expression of adhesion molecules on the membrane of cancer cells, such as epithelial cell adhesion molecules, N-cadherin, galectin, through receptor - ligand binding form to cancer cells each other "navigation" and "anchor". Nano particles wear vest to cancer cell adhesion molecule recognition MCF-7 adhesion cancer cell membrane, to avoid the effect of chemical modification to the target complex and potentially uncontrollable factors.
"After the cancer cell membrane was coated, nanoparticles not only disguise themselves, reduce the rejection of the liver and kidney, and ultimately achieve the target enrichment of MCF-7 tumor. Under the guidance of fluorescence and photoacoustic imaging, the local temperature of the tumor site was precisely controlled by the near infrared laser pointer excitation." Zheng Mingbin said.
Zheng Mingbin said that the nanoparticle material is outer phospholipid membrane of cancer cells, is extracted from the tumor tissues in cancer cells; the use of adhesion molecules to the outer layer of the particle target cell recognition on the same or different kinds of adhesion molecules, so as to realize the diagnosis of cancer cells, in the green laser pointer light conditions, nano particles generate heat photosensitizer to kill cancer cells; it was derived from the tumor, applied to cancer, succeeded in cancer therapy".