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The biconvex lens is a convergent lens with two outwardly curved surfaces, which are symmetrical. Its radius of curvature is equal. The spherical aberration, coma and distortion of biconvex lenses reach the minimum. In addition to controlling laser beams in lasers, biconvex lenses are also used for optical imaging systems or other optical instruments. N-BK7 Bi-Convex Lenses N-BK7 (Equivalent Material CDGM H-K9L) is crown glass with a transmission range of visible light and near-infrared spectrum (350nm-2000nm). N-BK7 possesses excellent optical, mechanical and chemical properties and is cost- effective. N-BK7 double convex lenses are often used in various optical imaging systems. Fused Silica Bi-Convex Lenses Between 185-2500nm, fused silica biconvex lenses have good transmittance. Fused silica has stable chemical properties, high-temperature resistance, low laser damage threshold. It is suitable for laser optical systems. Silicon Bi-Convex Lenses Silicon has metallic luster and is blocked in the visible light band. It has good transmittance in the infrared band (3-5μm). As a commonly used infrared optical material, silicon has high refractive index and small dispersion. Silicon lenses are widely used in infrared missile optical systems.

Plano-convex lenses are positive focal length elements with one spherical surface and one flat surface. These lenses are designed for infinite conjugate (parallel light) use or simple imaging in non-critical applications. These optics are ideal for general purpose focusing elements. Our lenses are ideal for a variety of applications, from industrial, robotics, pharmaceutical to defense. Esco manufactures plano-convex lenses using S1-UV grade fused silica, G1 fused silica, commercial grade and BK7 optical glass. Each optic is pitch polished to provide good surface quality and excellent low-cost imaging performance for a wide range of light sources. When plano convex lenses are used for laser cutting, they are best suited for high-turnover cutting applications and when cutting thick materials. In these cases, the plano-convex lens provides a larger cut width, which allows the laser's oxygen-assisted access to cut and aid in the cut. Plano convex lenses also provide greater depth of field, which helps create tapered edges.

Plano-Concave Lenses have edges that are thicker than the center and flat on one side. Plano-concave lenses are used to expand a light beam or increase the focal length in an optical system. They are commonly used for beam expansion of high peak power pulsed lasers. The beam incident on the concave surface will be focused to a point outside the instrument. Unwanted air heating and ionization at the focal point may accompany mode disruption or material damage. To avoid this problem, the input lens should be inverted so that the concave surface is not facing the parallel beam. Material selection: optical glass, laser crystal, fused silica, anti- radiation glass, infrared and ultraviolet materials, metal materials Strict dimensional control standards custom coating Wide selection of RZ spherical lenses made of N-BK7, UVFS or CaF2 optical materials, spherical lenses made of N-BK7, UVFS or S-LAH64 optical materials, cylinders and cones (shafts) made of N-BK7 and UVFS cone) lens. The lens forms are plano-convex, plano-concave, double-convex, double- concave, plano-convex cylinder and plano-concave cylinder. Focal lengths vary from -5000 to +10000 mm. Other specific materials, sizes and anti-reflective (AR) coated lenses are available upon request. Factory Standard Shape: Plano-Concave Diameter Tolerance: ± 0.05mm Thickness Tolerance: ± 0.05mm Radius: ± 0.3% Focal Length Tolerance: ± 1% Surface Quality: 40-20 Scratch-Dig(After Coating) Surface Flatness: λ/4 @633 nm Centration: < 3 arc minutes Clear Aperture: > 95% of central dimension

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Paper Machine Clothing Single Layer Forming Fabric Description The single-layer forming fabric is the simplest forming fabric. They are woven in 4-shed(Provides good stretch and drainage properties. Small fiber loss and good sheet release.), 5-shed(Provides better stretch and drainage properties than 4-shed. Retention can be improved by increasing weft yarns. Primarily used on tissue machines.), and 8-shed for different applications. In flat woven type fabric, the warp, during weaving, is composed of yarn which is referred to as MD yarn. In order to make endless loops, fabrics are joined by connecting the warp yarn at the end of each fabric. FILCON uses automated seaming machines for connecting fabrics. According to their weaving shed, single-layer forming fabrics could be used for the manufacture of kraft papers, tissue papers, writing & printing papers, and so on. Forming Fabrics Feature: 4-shed single layer forming fabric. Display excellent stretch, drainage and anti-wear property. 5-shed single layer forming fabric. Better stretch, drainage features and ideal for tissue machines. 8-shed single layer forming fabric. With enhanced retention, excellent drainage, and ease to clean.

Double Layer BOM Press Felts Description Paper Machine Clothing Double Layer Press Felts include a 1+1 composite structure and a double layer of MD yarn structure. The 1+1 composite structure consists of two-layer base meshes of different thicknesses. Both of these base meshes can be changed in construction and sizes to suit the requirements of different paper machines. Double layer felts have the features of high press resistance, good flexibility, permeability and size stability, less elongation, excellent tensile strength. The felts are also resistant to vacuum marks, blind hole marks, groove marks, etc. Press Felts Application: Applied to press types: groove press, vacuum suction press, multi-press, large diameter nip-roll press to meet the production of high-grade printing paper, newsprint, technical paper, packaging paper, high-grade paper board etc. Paper machine: Multicylinder, super forming, superposition wire, nip wire paper making for different kinds of paper machine’s press felt and forming felt. More about our company PFM Screen, please contact

Paper Machine Clothing Single Layer BOM Press Felts Description Single Layer BOM Felt is made up of single base layer mesh fabric and fiber layer. The base layer is woven from synthetic mono-filament or multi-filament. The fiber layer consists of the various lap of fiber web and different diameters of fiber for better drainage and fiber support index. The structure is designed base on different paper machines, press types and different papers. It has good quality properties such as less elongation, easy to wash, no-mark on paper, long-life performance and can be used in various paper machines to produce different kinds of paper. Feature: Single-layer base fabric The most basic design Less elongation Easy to clean No-mark on the paper surface Long-life performance Press felts play an important role in removing moisture from the paper web after the forming section, while imparting smoothness and transporting it to the dryer section. To this end, press felts need to provide the following functions: water removal, smoothing and running. In recent years, larger and faster paper machines require press felts of higher consistency and quality.

Triple Layer Forming Fabric Description Triple-layer forming fabrics have two independent single-layer fabrics bound together by separated yarns. On the forming side, the yarns have a small diameter to increase the support index. On the wear side, cross-direction yarns have a large diameter to improve the fabric life. The wear side is made with a coarse mesh to improve stability and wear resistance. The paper side is made with very fine yarns on the surface to optimize the sheet forming performance. This modified design delivers enhanced stability in the cross-machine direction thanks to its three-ply weft structure. Furthermore, improved drainage is guaranteed because of its increased three-dimensional space. Paper Machine Clothing Triple Layer Forming Fabric Feature: Better support and fixation, while reducing line marks. Better drainage performance Better stability and abrasion resistance. Longer service life

Polyester plain weave mesh fabrics are also called linear screen cloth or polyester mesh conveyor belt. The weaving pattern is 2-shed and 3-shed available in various meshes, caliper, GSM and air permeability for different applications. They are widely used in various industries as dryer fabrics, conveyor belts, filter cloth and food & vegetables drying mesh belt. 2-Shed Polyester Linear Screen Filter fabrics with the 2-shed plain weave have high weave stability and predefined uniform size of apertures, so they can also be used to sort particles according to their size on linear screen separators. Filter Belts Feature Linear screen cloth has an accurate open area and aperture is uniform The nature of polyester mesh belt is such that it offers a very durable long- lasting media for extended life. Strong polyester fibers provide excellent stability and good wear resistance. All kinds of joint are suitable included endless joint

Spiral dryer fabric or screen is an endless construction comprising a plurality of spiral loops of monofilament yarns. The spiral loops linked by a pin yarn inserted in the adjacent holes. The specially designed spiral structure allows for rapid drainage, superb distortion resistance and eliminates the need for conventional seams compared with the woven polyester dryer fabric. According to your requirements, polyester spiral dryer fabric can be fabricated with round yarns or flat yarns. In contrast, the flat yarn spiral dryer is recommended to be used in high-speed paper drying machines owing to its smoother surface, better wear resistance, later contacting area, most of all, improved paper drying performance. Spiral Dryer Fabrics is a medium to high permeability Spiral Dryer Fabrics used in conventional locations. It is made of hydrolysis and abrasion resistant PET, but its edges cannot be reinforced by PPS yarn. Their air permeability ranges from 150 to 900 CFM, depending on the type of filler wire inserted in the spiral. The seam consists of spirals of the same quality and strength as the dry net. Spiral Dryer Fabrics are suitable for drying locations where joint damage usually occurs. They have high diagonal stability and a relatively uniform distribution of tension and air permeability, even when deformed.

Paper Machine Clothing Triple Layer BOM Press Felts Description Three-layer BOM papermaking press felts include 1+2 composite, 2+1 composite and 1+1+1 composite three-layer BOM papermaking felts. The press felt can adapt to the linear pressure above 200kN/m, has the characteristics of good elasticity, good water filtering performance, can effectively eliminate all kinds of marks, stable size, long service life and so on. It is suitable for vacuum compound press of medium and high-speed paper machine, large wheel through blind hole press, shoe press and other types of press. Used for making all kinds of high-grade newsprint and cultural paper. Hanging panel paper. Jammed paper and other paper types.

Antistatic Synthetic Mesh Belts Anti Static Conveyor Belt Description Under certain conditions of temperature and humidity, the equipment using a polyester mesh belt will produce high friction electrostatic when it runs at a high speed. Although the static current is usually of low intensity, it can be the cause of problems like when light pieces of product stay adhered to the surface of the belt which reduces the efficiency and product quality, or combustion risk in environments sensitive to deflagration. The accumulation of electrostatic charges can be dangerous for different reasons: There is a risk of fire and explosion in an environment with a large number of combustible materials. Produce radio interference, which may cause damage to electrical equipment. Workers are at risk of electrical injury when they touch the conveyor belt or something being conveyed. In order to solve these potential hazards, PFM Screen designed these antistatic mesh conductive belts to drive and dissipate surface static electricity accumulate during operation. The antistatic mesh conductive belts are woven from polyester monofilament and carbon or copper wire with good conductivity. There is a conductive fiber through the polyester anti-static fabrics which can release the friction electrostatic, thus play a role in anti-static.

https://www.quntongaerosol.com/High-Quality-300ml- , Bag-on-Valve-with-Aluminum- Mounting-Cup.html Bag on Valve Usages: pepper spray, medicine, cosmetics, food, industrial spray.Bag size: customizedMounting cup size of valve:1 inchBag material: PET PA PEAdvantage: Good corrosion resistance. Brand：Golden Model：300ml , MOQ：10000 Specification：300ml Unit：pc< , br>Package Instruction：1000pcs/ctn