Recently, the General Administration of Quality Supervision, Inspection and Quarantine issued the "Announcement on Announcement of Results of National Supervision and Random Inspection of 28 Product Quality in 2012". According to the announcement, in accordance with relevant regulations, the General Administration of Quality Supervision, Inspection and Quarantine conducted spot checks on the quality of 28 types of domestically produced consumer goods, building decoration materials and other 28 products . In the results of random inspections on the quality of spring soft mattresses and wooden furniture products, it was found that the Beijing brand Wowang, IBOSS, and Xingpai were exposed because of unqualified quality. Wood furniture product quality supervision and inspection results show, the total sample of 239 enterprises produced 239 kinds of wood for furniture products in 45 kinds of products do not meet the required standards, related to formaldehyde emission, carpentry requirements, Cabinet Stability, strength of push-pull components, resistance to cigarette burning, wear resistance, impact resistance, adhesion. Among them, the star brand push cabinet produced by Beijing Xingyu Wood Industry Co., Ltd. failed to meet the requirements due to carpentry requirements and mechanical properties (cabinet stability). The IBOSS brand push cabinet produced by Beijing Century Jingzhou Furniture Co., Ltd. was listed on the black list due to excessive formaldehyde emission. According to the results of the national supervision and random inspection of the quality of spring mattress products, this random inspection involves 120 types of spring mattress products produced by 120 enterprises in 22 provinces, autonomous regions and municipalities directly under the Central Government. A random inspection found that 9 products did not meet the requirements of the standard, involving formaldehyde emission, bedding, and durability items. The Wowang brand single spring soft mattress produced by Beijing Wowang Furniture Co., Ltd. in August 2012 was judged to be unqualified due to excessive formaldehyde emission. Another single mattress made by the Ascott Mattress Factory in Zhangjiawan, Beijing, in May 2012 also failed the random inspection for the same reason. The announcement stated that the General Administration of Quality Supervision, Inspection and Quarantine had instructed the relevant provincial quality and technical supervision departments to deal with unqualified products and their production enterprises in accordance with the law in accordance with relevant laws and regulations.
A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are popular for many imaging applications.
Some styles of cylindrical lenses have antireflective coatings to increase the transmission of light through the lens. Fused silica cylinder lenses are ideal for demanding laser machining and medical applications.
We supply kinds of plano-convex
Cylindrical Lens,plano-concave cylindrical lens,bi-convex cylindrical
lens,bi-concave cylindrical lens,meniscus cylindrical lens,Rod
cylindrical lenses,special cylindrical lens etc.Every sizes,materials cylindrical lenses are available according to your detailed parameters.
Double Convex Lens
Specification of our cylinderical lens as follow:
Double Convex Lens,Double-Concave Cylinder Lens,Bi Concave Cylindrical Lens,Optical Glass Double-Convex Cylinder Lens China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com
*Material: BK7,Ge,UV-grade fuse silica(JGS1,JGS2,JGS3)or other optical materials
*Dimension Tolerance: +0.0 -- -0.1mm
*Center Thickness: +/-0.1mm
*Focal Length Tolerance: +/-1%
*Surface Quality:20/10
*Surface Figure: lambda/2 at 633nm on plano side
*Clear Aperture>90%
*Chamfer: 0.25mm at 45 degree typical
*Coating Optional