Jollystar Hot Product - Plano-convex cylindrical lenses Specification: 1. Optical material 2. High quality images 3.A vast number of carious facilities 4.Made in China A cylindrical lens is a lens which focuses light which passes through onto a line instead of onto a point, as a spherical lens would. The curved face or faces of a cylindrical lens are sections of a cylinder, and focus the image passing through it onto a line parallel to the intersection of the surface of the lens and a plane tangent to it. The lens compresses the image in the direction perpendicular to this line, and leaves it unaltered in the direction parallel to it (in the tangent plane). Cylindrical lenses can be used to correct ocular astigmatism, although toric lenses are more commonly used. They can also potentially be used in solar water heating installations, such as a plastic pillowtype solar water heater. They are used to correct the output from diode lasers, to produce a round beam from the diode's elliptical output. Feature: Material:Bk7 A glass,Quartz. Focal length:±1% Length tolerance:±0.1mm Width tolerance:±0.1mm Center thickness tolerance:±0.1mm Centration:5Arc minutes Surface precision:0.5frings/cm Surface quality:60-40 stratch/dig Clear Apenture:90% Coating:no or AR
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