May 17 is the annual World Telecommunication Day. The theme of this year's World Telecommunication Day is "Telecom and ICT: the driving force of innovation." Every day, people must sort out the development trend of information technology and industry. For China’s hundreds of millions of Internet users, this year’s Telecom Day can be said to be the most “affordable†Telecom Day ever, because just on May 15th, the three major telecommunications operators also announced the “speed reductionâ€. new plan. Achromat doublet lenses have significantly better optical performance than singlet lenses in visible imaging and laser beam manipulation applications.It consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen so as to cancel chromatic aberration at two well-separated wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromat is typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, spherical aberration and coma are greatly reduced. We always make our achromats as precise specifications and tolerances for uncompromising image quality upon customer's requirement.
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The data ** is in full swing and this year's Las Vegas Consumer Electronics Show in the United States, the Mobile World Congress in Barcelona, ​​Spain, and the IT Expo in Hanover, Germany, have been held in the first quarter. These three exhibitions are known as the world's IT industry. They said that their common hot spot this year is "data**."
Representatives from various sectors of the exhibition elaborated the following viewpoints from different angles: Data is becoming an important raw material like oil and steel, and data with data as an important driving force is coming. Who can seize the opportunity of data **, who is expected to occupy the commanding heights of a new round of science and technology and industry.
The "digital **" to "data **" leap ** refers to the computer's digital representation that converts various kinds of information into "1" or "0". Its symbol is the arrival of computer inventions, Internet advent and digital era.
The concept of data** originates from big data technology. At present, billions of people use computers, mobile phones, navigators, and medical devices to generate large amounts of data. Mining these data will have a huge impact on various industries.
If the number ** focuses on changes in production tools, then the data ** is more focused on the transformation of raw materials. In the era of data, people will use various kinds of data as the object of work and combine data with traditional industries to achieve the purpose of saving production costs, increasing work efficiency, creating new demand and new economic growth points.
Frazer, head of the Hannover IT show this year, once said that human beings are facing a new technology and industry. Data is the key to change, and data analysis technology is the core. At the theme forum on big data and data science advancement held in Beijing in January this year, the Chinese Academy of Engineering academician Chen Whale said: "The information world in the future is 'three-point technology, seven-point data', and the person who gets the data will have the world."
The Internet of Things is the foundation of data** At this year's World IT Expo, the Internet of Things, big data, cloud computing, mobile Internet, "Industry 4.0", "Internet", artificial intelligence and more humane terminals have become hot spots.
Experts proposed that the basis of data** is the Internet of Things, and the Internet of Things will generate a huge amount of valuable data. Cloud computing and 5G technologies provide technical support for the processing and transmission of big data. Looking ahead, artificial intelligence, brain science and its applications will provide powerful tools for data.
According to forecasts of experts from the United States and Europe, the number of connected devices in the world will reach 25 billion by 2015, and the total installed number of sensors will reach 100 trillion, which will lay the foundation for further popularization of the Internet of Things.
The Internet of Things cannot be separated from the mobile Internet. Mobile Internet requires 5G technology. Experts from South Korea’s SK Telecom stated that despite the industry’s debate on the definition of 5G technology, for users, 5G technology means that 1G per second can be achieved at any time and location, which will be relevant to related technologies and applications. Create innovative impact.
In addition, once major breakthroughs are made in brain science and artificial intelligence research, there will be a quantum leap forward for data. Human brain research has now been incorporated into major scientific research projects in the EU and the United States.
IoT security is particularly important for data** In the first half of the world's major IT exhibitions, people from all walks of life expressed concerns that the data may have a negative effect, and information security has received much attention.
The US Federal Trade Commission Ramirez said that the Internet of Things can collect, transmit, store, and share large amounts of data from people, including some personal privacy. People may be monitored in all directions.
The Max Planck Institute for Software Systems in Germany also believes that, theoretically, data can be used to obtain the privacy of anyone, and people may have no place to hide. Therefore, it is necessary to strengthen the protection of personal privacy from the perspectives of the judiciary, science, technology and society and ensure the security of information.
Kaspersky Lab in Russia pointed out that the large number of home appliances being connected to the Internet may cause many unexpected results, and most manufacturers and developers lack experience in responding to IoT security.
Similar to the “digital divide†that emerged more than 20 years ago, the rise of data** and the Internet of Things may also bring about a “data gap,†a generalized information security issue. If some countries fail to follow up in a timely manner, the gap between them and the advanced countries in this field will be rapidly widened, and the gap between the rich and the poor and the gap between the North and South will be further exacerbated. This should cause the international community's attention.
Data ** or will bring epoch-making changes to the human society The current world economic recovery is weak, need new technology and industry to stimulate, in order to greatly promote economic development and social progress.
The EU is trying its best to find breakthroughs in new technologies. It implemented the “Europe 2020 Strategy†five years ago and focused on the development of “digital economy†and “green economyâ€. In 2011, it also emphasized the development of advanced manufacturing.
In March 2013, the German government formally proposed the "Industry 4.0" strategy. In March 2015, the Chinese government proposed the "Internet" strategy. This means that advanced manufacturing and the "digital economy" will be integrated into the data**.
Data ** is likely to bring epochal changes to human society. Some experts believe that if China can seize the strategic opportunity of data, the “Internet†strategy will be the starting point, and efforts will be made to promote data in the aspects of conceptual formulation, rule formulation, technology research and development, product manufacturing, and service promotion. China's economic development and further improvement of its international status have played an important role.
*Material:BK7,ZF2,ZF7(or according to your request)
*Dia.:+0/-0.05
*Center thickness tolerance:+/-0.1
*Surface quality: 60-40 Scrath/Dig
*Surface figure:0.5-0.2
*Centration < 3arc min
*Chamfer:0.1-0.25*45 degrees
*Design wavelength:486.1mm,587.6mm,656.3mm and upon request.