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.
Doublet Achromatic Lens Triplet Achromatic Lens
Specification of our achromatic lens as follow: Achromatic Doublet Lens,Negative Optical Achromats Lens,Optical Achromatic Lens,Big Dimension Achromatic Lens China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com
*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.
Car video surveillance solution
With the vigorous development of public transport, the safety and management of public transport operators in the operation process are also increasingly valued. In recent years, in addition to the constant disputes over the transport of public transport passengers across the country, cases of theft, robbery, etc. have occurred on buses, which have plagued public transport management personnel and public safety departments, and have seriously disturbed social stability. According to the “Shenzhen Evening Newsâ€, the most incidents that occurred on buses were plagiarism, robbery and other cases. Although the police took a series of measures such as thousands of people escorting cars, the public security situation on the bus is still grim. Frequent cases on the bus make it difficult for people in Shenzhen to travel by bus. Statistics show that about 3.5 million people travel to Shenzhen every day to take public transportation. The safety of bus lines has become a barometer for the public to measure the public security in Shenzhen.
Let us first look at the relevant news headlines extracted from relevant websites, newspapers, and TV news: The flight attendants will not receive tickets or give false tickets mid-way. Passengers will lose 3-5 thousand yuan per vehicle per month; bus drivers The thief reached into the coin acceptor; Nanjing bus passengers evaded nearly 300,000 tickets a year; Foshan drivers dunked and beaten; Liuzhou drivers were beaten repeatedly; Urumqi drivers reminded passengers to be retaliated against by thieves; "city cards" stained spots, and Jinhua bus reversed.扒斩 "Black Hand"; Shenzhen police took a number of measures to improve public security and public order; Liuzhou Bus Company was equipped with anti-illiterary young volunteers; Taiyuan Bus "smile service" was known from both north and south. From the above news, we can see that whether it is a passenger transport company and a bus group, or a bus or bus driver, it is still a headache. Citing the head of the Shenzhen Transportation Bureau*, “The robberies in the vehicle are a streaming action. Passengers can get up and down, after the case is reported, it is difficult to find a person's card, and it is often difficult to grasp the evidence, catch difficulties, and conviction difficulties.
At present, the passenger transport departments around the country are actively using scientific and technological means to improve the existing status of passenger transport and strive to provide tens of millions of passengers with more safe, comfortable, and satisfactory services every day. China's passenger transportation With the introduction of various technologies, high-end intelligence will become a new trend!