Xiamen Jiayu Optical Co., Ltd.
Plastic Optical Lens
May 27, 2021
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Optical plastic raw material is a kind of optically multifunctional polymer transparent material that can be comparable to optical lens, divided into thermosetting and thermoplastic; commonly used plastic optical lens raw material is mainly thermoplastic raw material, based on polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), ZEONEX and COC, etc., due to the characteristics of thermoplastic optical plastic materials that are heated and melted and solidified after cooling, it is easy to mold into various optical lenses with complex shapes It provides convenient conditions for the processing of plastic optical lenses; plastic optical lens injection molding uses the characteristics of thermoplastic optical plastic raw materials to melt the plastic raw materials into a fluid state under specific temperature conditions (within 300C), and then use A fixed pressure and speed extrude the molten plastic into a prefabricated mold for cooling and solidification. Since the mold is designed and manufactured according to the requirements of the lens (especially aspherical processing), the plastic optical lens has the advantages of processing the finished lens at one time. So that the plastic optical lens can realize the mass production of aspherical surface or even double aspherical surface.
Due to these characteristic factors of optical plastic raw materials, compared with optical glass lenses, optical plastic lenses have the following characteristics:
advantage:
1.Plastic lenses can be designed to integrate various spherical, aspherical and frame lenses with complex shapes;
2. It is easy to process the finished lens at one time, the production cycle is short, and mass production can be realized, so the production efficiency is greatly improved and the production cost is reduced.
3. The plastic lens has a small specific gravity, which greatly reduces the weight of the product and is easy to carry;
4. The plastic lens has good impact resistance and is not easily broken;
5. Since aspherical or even double aspherical can be achieved, the number of lenses can be reduced, the focal length can be reduced, the camera range can be increased, and aberrations can be eliminated. All these provide the necessary conditions for miniaturization of the camera.
Disadvantages:
1. Since plastics are easily deformed and aging due to water absorption and temperature changes, optical plastic lenses have poor heat resistance and weather resistance, and have a short service life;
2. The surface of the plastic lens is easily contaminated by dust and pollution due to static electricity;
3. The plastic lens has low hardness, the surface is easy to scratch, and generally cannot be wiped;
4. Plastic lenses will produce double refraction, and improper selection of raw materials will cause ghosting.
Optical plastic molding technology is currently an advanced technology for manufacturing plastic optical lenses, especially aspheric optical lenses, which includes injection molding, casting molding, and compression molding technologies. Optical plastic injection molding technology is mainly used for mass production of plastic optical lenses with a diameter of less than 100 mm, and can also manufacture micro lens arrays; while casting and compression molding technology is mainly used for manufacturing plastic optical lenses with a diameter of 100 mm or more. The injection molding method is a simple and practical plastic optics that injects a quantitative optical plastic that becomes a fluid after heating into a stainless steel mold, and is molded under heating and pressure conditions. After cooling and solidification, the mold is opened to obtain the required finished lens. Lens processing technology.
Due to these characteristic factors of optical plastic raw materials, compared with optical glass lenses, optical plastic lenses have the following characteristics:
advantage:
1.Plastic lenses can be designed to integrate various spherical, aspherical and frame lenses with complex shapes;
2. It is easy to process the finished lens at one time, the production cycle is short, and mass production can be realized, so the production efficiency is greatly improved and the production cost is reduced.
3. The plastic lens has a small specific gravity, which greatly reduces the weight of the product and is easy to carry;
4. The plastic lens has good impact resistance and is not easily broken;
5. Since aspherical or even double aspherical can be achieved, the number of lenses can be reduced, the focal length can be reduced, the camera range can be increased, and aberrations can be eliminated. All these provide the necessary conditions for miniaturization of the camera.
Disadvantages:
1. Since plastics are easily deformed and aging due to water absorption and temperature changes, optical plastic lenses have poor heat resistance and weather resistance, and have a short service life;
2. The surface of the plastic lens is easily contaminated by dust and pollution due to static electricity;
3. The plastic lens has low hardness, the surface is easy to scratch, and generally cannot be wiped;
4. Plastic lenses will produce double refraction, and improper selection of raw materials will cause ghosting.
Optical plastic molding technology is currently an advanced technology for manufacturing plastic optical lenses, especially aspheric optical lenses, which includes injection molding, casting molding, and compression molding technologies. Optical plastic injection molding technology is mainly used for mass production of plastic optical lenses with a diameter of less than 100 mm, and can also manufacture micro lens arrays; while casting and compression molding technology is mainly used for manufacturing plastic optical lenses with a diameter of 100 mm or more. The injection molding method is a simple and practical plastic optics that injects a quantitative optical plastic that becomes a fluid after heating into a stainless steel mold, and is molded under heating and pressure conditions. After cooling and solidification, the mold is opened to obtain the required finished lens. Lens processing technology.
