Optical Lenses
An Aspheric Lens is an optical lens with a special profile, the word “aspheric” here means not being a portion of a sphere. The difference between a normal spherical lens and an aspheric lens is that an aspheric lens has a more complex optical front which varies in a radius of curvature from center to edge along the optical axis, such as ellipse, parabola, hyperbola, and quadric. The advantage of an aspheric lens is that its special front shape allows it to mitigate or attenuate the various optical aberrations such as spherical aberrations, chromatic aberration, astigmatism, etc., and elevates the overall qualities of images. The most notable virtue of aspherical lenses is the correction of spherical aberration, which is the innate failure of spherical lenses to converge parallel light into the theoretical focal point, causing a blurring. Eliminating the effects of spherical aberration, an aspheric lens presents crisp spots and better image qualities. In addition, an aspheric lens allows a larger numerical aperture (low f-number) and therefore increases the light throughput, achieving higher power efficiencies. Incorporation of aspheric lenses into lens modules also could help to reduce the element number because the former gives them more aberration correction than multiple surfaces of the latter. A Fewer number of aspheric lenses could be substituted for a handful of spherical lenses. With the exemption of excessive optics for correction of spherical aberrations, the utilization of aspheric lenses enables simplified, compact designs and lowered production costs. The applications of aspheric lenses are manifold, including barcode scanners, laser diode collimation, illuminations, OEM, or Research and Development integration.
Hangzhou Shalom EO offers various types of aspheric lenses including Plano-convex/concave Aspheric Lenses, Biconvex/Biconcave Aspheric Lenses, Meniscus Aspheric Lenses, Ball/half ball aspheric lenses, etc. We are capable of providing Aspheric Lenses of Commercial Grade, Standard Grade High precision Laser Grade. For high-volume production of aspheric lenses, we utilize precision glass molding techniques to obtain efficient productiveness in short timescales. For mid-to-low-scale production, we use the CNC (Computerized Numerical Control)-polishing technique. Compared with the glass molded counterparts, CNC polished lenses are available in larger sizes, provide better surface smoothness, and maintain the M squared values of the input beam better. We also introduced the MRF (Magneto-Rheological Finishing) technique into our production line, where the high-precision polishing technique contributes to true diffraction-limited spot sizes and the lowest wavefront error of the lenses. Our Aspheric Lenses are sold in two categories: Collimation Aspheric Lenses and Condenser Aspheric Lenses. Aspheric collimation lenses are an excellent option for collimating light emerging from fibers or laser diodes. The aspheric condenser lenses exhibit exceptional light-converging capability, creating focal points of intense energy, the lenses are a superb choice to be integrated into laser cutting machines.
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