Aluminum wire drawing process
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
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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.opticsrealpoo.com
Straight-line drawing means that straight lines are machined on the surface of the aluminum plate by mechanical rubbing. It has the dual role of brushing off the aluminum surface scratches and decorative aluminum surface. There are two kinds of continuous wire drawing and intermittent wire drawing. The continuous thread can be obtained by using a scouring pad or a stainless steel brush by continuously horizontally rubbing the surface of the aluminum plate (for example, by hand grinding with a cashing device or by brushing the steel brush with a planer on an aluminum plate). Change the wire diameter of the stainless steel brush to obtain different thickness lines. Intermittent thread is usually processed on a brush or a rubbing machine. The principle of making: adopts two sets of differential rotating wheels that rotate in the same direction. The upper set is a roller that rotates rapidly. The lower set is a roller that rotates slowly. The aluminum or aluminum alloy plate passes through two sets of rollers and is brushed out. Delicate, intermittent lines.
Random pattern drawing is a kind of irregular matt silk pattern with no visible lines obtained by moving the aluminum plate forward and backward and left and right under the high-speed copper wire brush. This kind of processing requires high surface quality for aluminum or aluminum alloy plates.
Ripples are usually made on a brush or a scribing machine. Using the axial movement of the upper set of grinding rollers, the surface of the aluminum or aluminum alloy plate is brushed to obtain a wave pattern.
Spinning, also known as rotation, is the use of cylindrical felt or grinding stone nylon wheel mounted on the drill, with kerosene and polishing paste polishing, aluminum or aluminum alloy plate surface rotation grinding and grinding obtained by a silk pattern. It is mostly used for decorative processing of round signs and small decorative dials.
The thread is a small motor equipped with a round felt on the shaft, which is fixed on the table, and is at an angle of about 60 degrees with the edge of the table. It is also made of a dragging plate with a fixed aluminum plate for pressing the tea. A polyester film with straight edges is used to limit the thread race. With the rotation of the felt and the linear movement of the carriage, a thread pattern with the same width is spirally wound on the surface of the aluminum plate.
Sandblasting is to obtain the surface of the film light decoration or fine reflective surface, in order to meet the special design needs such as soft gloss. Uniform and moderate sandblasting can basically overcome common defects on the aluminum surface.
For appearance parts, whether drawing or sandblasting, it is usually necessary to do surface oxidation. As for which process to choose, it should be a matter to be considered in relation to the styling. The surface textures obtained by the two processes are still different.
In addition, there is a process similar to sandblasting, but using a chemical corrosion method, commonly known as chemical battering or chemical sand surface corrosion, especially for aluminum surface treatment, the uniformity of the sand surface is far better than the spray Sand treatment. Chemical sand surface corrosion acidic and alkaline corrosion. Different surface colors and grit thickness can be obtained with different etching solvents and sand agents.
*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