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anjing University of Science & Technology

Nanjing University of Science & Technology(Nanjing University of Science and Technology)Is the industry of the people's Republic of China and the Ministry of information directly under a so industry and trade, science, engineering, arts, economics, management, law, education, arts etc. of the coordinated development of the multidisciplinary national key university, is the national "211 Project", "985 project advantage subject innovation platform" key construction colleges and universities is one of the named "111 project", "excellent plan", "Sino Russian University of technology alliance", known as "weapon technology talent cradle" reputation.

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Peking University

Peking University(Peking University),Referred to as Peking University, was born in 1898, the beginning of the Capital University, is the first National University in modern [1] Chinese That is the first to "University" identity and name and the establishment of the school, its establishment marked the beginning of modern higher education Chinese. The north is China since modern times only to the identity of the country's highest institution founded the school, the first is the highest national education administrative organs, the exercise of the Ministry of education function, unified management of national education. Peking University gave birth to the China's earliest modern educational system, and created the earliest Chinese arts, science, social science, agriculture, medicine, and other disciplines of University, is in modern times of China's higher education founder.

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Jiangsu Polytechnic Institute

Jiangsu Polytechnic Institute Located in the south of the Yangtze River, the Yangtze River Delta hinterland -- a historical and cultural city of Jiangsu city of Changzhou province. Schools to create in 1984, is dominated by industry, science, economics, management, art, religion, literature, law and other multidisciplinary coordinated development, has a distinctive feature of the provincial general undergraduate colleges and universities.

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Northwestern Polytechnical University

Northwestern Polytechnical University(Northwestern Polytechnical University),Referred to as "the west", is located in the ancient capital of Xi'an is industry of the people's Republic of China and the Ministry of information directly under a so the aviation, aerospace, marine engineering features, science and technology, mainly, tube, culture, economics, law coordinated development research, multidisciplinary and open type is a national key university, is a national "985 Project" and "211 Project" key construction colleges and universities, selected the "2011 plan", "111 project", "excellent engineer education and training program, is a member of the excellent university alliance", "Sino Russian University of technology alliance", pipe vice ministerial level institution, a research graduate school.

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Company profile Huihong photoelectric/ About us+ more

Jiangsu County of Haian Province Huihong photoelectric instrument plant

        Haian county hui hong photoelectric instrument factory is a middle area a company specializing in the production of optical glass factory, founded in 1985, committed to the different kinds of optical glass, precision optical lens, optical components, optical coating, photoelectric devices such as product development, production and sales.

        Hui hong photoelectric for over 30 years in well in the domestic market at the same time, actively explore the international market, the introduction of new and high technology, high precision equipment and advanced production technology, enterprise has passed the ISO: 9001 quality management system certification, environmental certification, etc.

        Hui hong photoelectric main products are various specifications of colorless optical glass, coloured optical glass, color filter, filter, filter, laser glass, quartz glass, insulated glass, uv black glass, through near infrared (far infrared), bandpass, visibility function correction, neutral gray glass (ND filter), polarizing film, silicon photocell, etc.

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Huihong photoelectric encyclopedia / FAQ + more

1, what is the production of optical glass raw materials process
Answer: the production of optical glass materials are oxides, hydroxides, nitrate and carbonate, and according to the requirements of the formula, the introduction of phosphate and fluoride. In order to ensure the transparency of the glass, must strictly control the content of colored impurities, such as iron, chromium, copper, manganese, cobalt, nickel, etc.. Ingredients require accurate weighing, mixing. The main production processes are melting, forming, annealing and inspection. , The melting A single batch melting method and crucible furnace (see kiln) continuous melting method. A single crucible melting method can be divided into clay crucible melting method and platinum crucible melting method. Regardless of the way of melting required stirrer to stir, and strictly control the temperature and stirring, the optical glass liquid to achieve a high degree of uniformity. The molding Optical glass molding method of classical broken crucible method, rolling method and casting method. But now, more and more widely by leaking molding (using a single crucible or outflow continuous melting liquid), can directly pull rod or dropping pressure type or leakage material forming the large size of the blank, improve material drop efficiency of yield and usage. The internal stress annealing in order to maximize the elimination of glass, improve the optical homogeneity, establish a strict system of annealing must be precise annealing. The test The indexes are: optical constants, optical uniformity, birefringence, stripes and bubble.
2, phosphate optical glass should be placed in place for a long time
Answer: general use of optical glass long time when not in use, should be placed in dry ventilated place, don't put in wet places, the best placed in the custody of moisture-proof cabinet, To prevent the surface "frost".
3,Optical glass production Processing procedure
Answer: First: the first, leveling optical glass materials for the lump material, need the big lump materials into strip, and the appearance of leveling, after a process prepare. Second: cutting The leveling good cut sheet third: glass edge chamfering, according to customer requirements chamfering chamfering, trimming. Fourth: fine grinding and polishing The semi-finished products on fine grinding, double-sided polishing, double-sided is smooth to achieve customer finish requirements. Fifth: inspection, packaging Out of the finished product quality inspection, after inspection, the inspection of qualified products packaging, warehousing. Finally issued by the courier package.
4, optical glass and other glass is what
Answer: optical glass for the manufacture of optical instruments or mechanical system of lenses, mirrors, prisms, windows and other glass materials. Including Colorless Optical Glass (usually referred to as optical glass), colored glass, radiation resistant optical glass, radiation proof glass and quartz glass etc.. The optical glass is transparent, chemistry and Physics (the height of the structure and properties of the high uniformity) with specific and accurate optical constants. Different points of optical glass and other glass is that it is a part of the optical system, must meet the requirements of optical imaging. Therefore, to determine the optical glass quality also includes some special and strict index.
5, what is the polishing process of optical lenses
Answer: optical lens is in optical glass made lenses, generally refers to through regulation of visible light lenses, optical lenses must be through the optical measuring instruments, the purity test, transparency, uniformity, refractive index and dispersion rate is in compliance with specifications, qualified glass block after forging heating, optical lens blanks. Optical lens after grinding and fine grinding fluid, there are thick layer of surface cracks, this method to eliminate cracks as the polishing layer.
6, according to the optical properties of optical glass
1, Colorless Optical Glass. There are special requirements for optical constants, visible area with high through, no selective absorption characteristics of color. Abbe number size according to the crown and flint glass, all kings and according to the refraction rate level is divided into several kinds and according to the refraction rate size are arranged in order. As the telescope and microscope, camera lens, mirror reflection prism, etc.. 2, anti radiation optical glass. Larger absorption capacity, high lead glass and CaO-B2O2 system glass on high energy irradiation, the former can prevent the gamma ray and X-ray radiation, which can be slow neutron and thermal neutron absorption, mainly used as the shielding and peeped through the window materials in nuclear industry, medical field, and so on. 3, color optical glass. Also called glass filter. Ultraviolet, visible and infrared region specific wavelength selective absorption and permeation, according to the spectral characteristics of points for selective absorption, cut-off and neutral grey 3 class; according to the coloring mechanism are divided into 3 types of coloring ion, metal colloid coloring and selenium and sulfur compounds coloring, mainly for manufacturing filter. 4, optical quartz glass. Using silica as the main ingredient, with characteristics of high temperature resistance, thermal expansion coefficient is low, high mechanical strength, chemical properties good for manufacturing of various bands through the special requirements of the prism, lens, window, mirror, etc.. 5, ultraviolet and infrared optical glass. In the ultraviolet or infrared bands with specific optical constants and high transmittance, ultraviolet and infrared optical instruments used or used as window material. 6, irradiation resistant optical glass. In gamma ray, certain X ray irradiation, the visible transmittance changes less, varieties and grades and Colorless Glass Optical, used for optical instruments and peep window manufacturing high-energy irradiation.
7, what is the ND grey mirror?
Neutral gray mirror is also called the dust density in the mirror, ND mirror, is a piece of pure gray transparent advanced optical glass. Its role is by weakening through the lens to reduce light exposure. This filter action is a non selective. That is to say, ND filter of different wavelengths of light for their ability to reduce is equal, uniform, weaken the light only played the role of, and color of the original object does not produced any effect, so it can be true representation of scene contrast and color photography and black and white photography apply equally. According to the "block" of light intensity, neutral gray mirror has multiple densities are available, such as ND2, ND4, nd8 (respectively on the extension of a file, file 2 and 3 file shutter speed) can also be more neutral gray mirror used in combination. It is not difficult to see that the numbers behind the ND, which represents the ability of ND to block light mirror. The larger the value of ND, the more serious the partial color, general quality of products using other technologies to achieve the minimum wavelength, color distortion and faithful reduction. ND mirror simply reduces the intensity of the light, so the color to the final imaging and can not influence, it will not affect the camera's white balance and automatic exposure. The use of the ND mirror, do not have any effect on the object color and contrast. In addition, due to the SLR camera is light through the lens, so any effect of ND on the camera does not mirror the automatic exposure system. In short, the use of artificially slow shutter in need, or reduce the external light, additional lenses ND mirror is very practical. Of course, due to the different lens of different caliber, so ND mirror also has different caliber, when used according to the different diameter of the lens aperture selection ND mirror.
8, UV Mirror.:
1, to protect the lens, avoid direct contact, causing damage; 2, atmospheric absorption in the ultraviolet, eliminate fog, increase the image clarity; UV is mainly used to prevent the fingers touch the lens, the lens into the dust. As for the function of UV filter, it is the second. In addition, before the use of CPL filters and the like, try to remove the UV, can reduce the occurrence of image circle of opportunity, improve the image quality. When facing the light source, especially at night, please remove the UV. lens or uneven glare will be more powerful. After all, not the integration of the lens, the cuff of error is inevitable.
9, infrared lens:
Infrared wavelength and visual quality of simple lenses: A:720nm or 680nm, 665650nm, cloudy or on TV you can see the general brightness red visible light image. B:760nm, very shallow items to 40 Watt household light bulb can see the bulb. At the proximal 20 Watt energy-saving lamp can find it very shallow dark lamp. On the TV screen to see what is normal. C:850nm against 40 Watt household lighting can see filament lamp. In front of a 20 Watt energy-saving lamp is almost can not see anything to, if you can see a lamp for secondary leaky lens. D:950nm on the 40 watt bulb almost invisible filament.
10, what is the sky mirror
The mirror is a cold light balancing filter. The characteristics of micro reciprocal degree absolute value is smaller, a major role in regulating the color temperature of the light source. Sky mirror to change the color and the magnitude of the effect is small, slightly elevated light source color temperature, due to the cold filter increased the effect of light source color temperature slightly. So it can be used to correct photographic images of the slightly reddish, orange tendency, in order to obtain the true color reduction, can also be deliberately to reduce the color temperature of a light source, in pursuit of a cool effect.