The mahogany furniture worth more than 100,000 yuan in the home, please ask the maintenance personnel to go to the door for repair, but did not expect the furniture to appear a slight crack. A few days ago, the reporter met a lady in a mahogany furniture store. She said to the reporter with eagerness: "I wanted to come to a professional store to find a professional mahogany furniture maintenance staff, but I asked several people who would not dare to pick up the job." The maintenance of high-grade mahogany furniture has become a problem, and the consumers of mahogany furniture sigh. According to Ms. Zhang, the mahogany furniture in her home was asked by the factory staff to repair the quilt after being dented by the child. After making up the dent, wipe the mahogany furniture with a damp cloth. Unexpectedly, more than a week later, the mahogany furniture was cracked. Ms. Zhang, who was distressed, consulted the old players and learned that mahogany furniture should not be stained with water, and should not be wiped with a damp cloth. Ms. Zhang, who was angry, found the claim from the manufacturer. The manufacturer replied that because the maintenance personnel and maintenance personnel are not the same batch, the staff may not know how to maintain the mahogany furniture. However, the cracks in the mahogany furniture in Ms. Zhang’s home are hard to say, which is caused by the cleaning of maintenance personnel. Because Ms. Zhang’s mahogany furniture has passed the one-year after-sales warranty and maintenance service period, the final manufacturer decided to give her a one-year free maintenance service. Ms. Zhang had no choice but to accept this solution. Despite this, Ms. Zhang was very uneasy about the maintenance service of the manufacturer. She decided to look for professional mahogany furniture maintenance personnel. However, after consulting the store for a long time, she did not find a manufacturer specializing in the maintenance of mahogany furniture. Several well-known mahogany brand companies were reluctant to work as a lady. Why is this happening? A salesperson told reporters that the after-sales warranty and maintenance service period of mahogany furniture is one year. Although most brands will provide paid extension warranty and maintenance services outside the one-year period, most of them are not professional enough. According to the reporter's understanding, in the furniture industry, there are few joint warranty services like 3C digital or home appliance industry, and there are few special national after-sales service centers. Most brands are still blank in after-sales value-added services and maintenance. For these furniture manufacturers, the furniture maintenance of their own brands is not in place, and how dare to undertake the maintenance of other brands of furniture? Not to mention the high-end mahogany furniture like Ms. Zhang’s home. “Maintainment of mahogany furniture, for most stores, neither want to do it nor dare to do it.†The sales manager of a well-known mahogany furniture brand store revealed to reporters, “Because of the different colors of wood furniture painted with modern furniture, Since modern times, high-grade mahogany furniture such as mahogany and red sandalwood that has been handed down from generation to generation has no paint layer on the surface, and it is very difficult to maintain. With the climate and the environment of the storage site, the wood has been continuously expanded and expanded, which requires more professional maintenance. The old mahogany has been passed down for years, and it will inevitably come into contact with an environment that is too humid or dry, causing internal mildew, corrosion, or cracking and fading, which can be solved by ordinary maintenance. Secondly, because of different regions and processes, different The mahogany furniture of the material needs different maintenance methods, but the owner of the general mahogany furniture rarely knows the origin and craft of the furniture. In addition to the professional engraving craftsman of the high-end wood species, few people can professionally maintain these antiques. Most of these craftsmen serve brand enterprises, which consumes manpower, material resources and financial resources. To develop a high-end mahogany furniture maintenance market, the cost is too high for brand companies." Information from GO Jiaju, want to know more home textile information, home information, furniture information, home decoration information, building materials information Welcome to the GO Jiaju official website. 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An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.
The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made fromglasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glasssuch as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion. The lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.
In the most common type (shown), the positive power of the crown lens element is not quite equalled by the negative power of the flint lens element. Together they form a weak positive lens that will bring two different wavelengths of light to a common focus. Negative doublets, in which the negative-power element predominates, are also made.
Achromatic Lens,Achromatic Objective Lens,Achromatic Condenser Lens,Achromatic Doublet Lenses, Triplet lens Changchun Ruiqi Optoelectronics Co.,Ltd , https://www.ruiqi-optics.com