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132017-12
Technical introduction of aspheric lens Aspherical Lens is the lens for aspherical lenses used for lenses. That is to say, the surface shape of lenses may be two times, three times of surfaces. The three surface is also called free-form surface. The ...
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132017-12
Ultra precision polishing (grinding) technology for aspheric parts Ultra precision polishing is a processing method of very slow processing speed. Not suitable for shape generating processing, in recent years, due to the rapid development of short wavelength optical element, O...
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062017-12
Analysis Fresnel lens principle The Fresnel lens, also known as a threaded lens, was invented by the French physicist Augustine Fresnel, who first used this lens design in 1822 to create a glass Fresnel lens system - a lighthouse lens. Seen ...
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052017-12
Fresnel optical lens applications and advantages Fresnel optical lens is a branch of the lens, because it compared with other lenses, with the advantages of small size, light weight, compact structure, while it is not inferior to other lenses of good condensi...