The process heats the glass in the high temperature, which makes it malleable, then forms it in an aspheric mold and gradually cools it to room temperature. At present, the precision glass molding is not suitable for producing aspheric lens with diameter larger than 10mm. But new tools, optical glass and the metrology process, are driving the technology. The cost of precision glass molding is high in the early stage of design, and the main cost is used in the development of high precision mould. But in the case of mass production, a large number of high quality products can be amortized over the initial development costs.

Aspherical lens photography

Plastic shaped aspherical lens, with low cost and light weight, is suitable for manufacturing lens of large batch, moderate quality and low thermal stability.

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Define asphericlenses

Mixed molding aspheric lens is using spherical lens as the base, die-casting on the surface of spherical lens by an aspherical mold and UV curing on a layer of polymer aspherical. The achromatic spherical lens is usually used as the base and a layer of aspherical surface which is die-cast on the surface to eliminate the chromatic aberration and spherical aberration.Mixed molding aspherical lens is suitable for mass production where additional characteristics (elimination of chromatic aberration and spherical aberration) are required.

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Asphericlens meaning

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Asphericlenses advantages disadvantages

Grinding and polishing is generally applicable to the production of a single aspheric lens, with the improvement of technology, its accuracy is better and better. Precision polishing is controlled by a computer and automatically adjusted to achieve parameter optimization. If better quality polishing is required, magneto-rheologic finishing will be used. Compared with standard polishing, magnetorheological finishing has better performance and shorter time. Precision polishing molding, requiring professional equipment, is currently the first choice of sample production and small batch sample.

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AsphericIOL

Precision glass moulding aspheric lens, with mass production and high thermal stability, is suitable for being manufactured with large batch, high quality and high thermal stability.

Generally speaking, the spherical lens is thicker, the imaging through the spherical lens will deform. Aspheric lens, on the other hand, is thinner and lighter, and make a more natural and realistic image.

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Define asphericeye

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Asphericpronunciation

In addition to glass aspherical lens, there are also plastic aspherical lens. Plastic molding is the injection of molten plastic into an aspherical mold. Compared with glass, plastic has poor thermal stability and compression resistance, and requires special treatment to obtain similar aspherical lenses. However, plastic aspherical lens is characterized by low cost, light weight and easy to be shaped. It is widely used in moderate optical quality, insensitive thermal stability and low pressure resistance.

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Asphericcontact lenses

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The precision polishing aspheric lens has the characteristics of short sample preparation period and no need of mould. It is suitable for sample making and small batch sample.

The aspheric lens has a better radius of curvature and can maintain good aberration correction to achieve the desired performance. It is necessary to know some important parameters before choosing a suitable aspheric lens.

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In order to understand these parameters, it is necessary to know the disadvantages and advantages of aspheric lens, compared with spherical lens. In a word, aspheric lens has unique advantages over spherical lens, so it has been widely used in optical instrument, image and optoelectronics industry, such as digital camera, CD player, high-end microscope.

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Mixed molding aspherical lens has the characteristics of spherical aberration and chromatic aberration calibration. It is suitable for manufacturing of wide spectrum, large batch and high quality.