Aspherical Plastic Lens Optical System for Mobile Camera Resolution

The patent replaces expensive glass lenses with cheaper plastic lenses. Specifically, it uses a combination of plastic lenses including aspherical plastic lenses to achieve high resolution while reducing manufacturing costs. The patent explicitly states that using plastic lenses instead of glass lenses reduces the unit price of the camera module while maintaining optical performance.

The patent employs composite lens designs combining different types of plastic lenses (aspherical and spherical) with specific refractive powers and Abbe numbers. This composite approach allows correction of chromatic aberration and achievement of high resolution using cost-effective plastic materials rather than traditional glass.

The patent employs aspherical surfaces on plastic lenses to correct aberrations. Specifically, it uses aspherical plastic lenses with carefully designed aspherical coefficients to correct spherical aberration and other optical imperfections, achieving high resolution while using cost-effective plastic materials.

The patent optimizes various parameters including refractive indices, Abbe numbers, focal lengths, and aspherical coefficients of the plastic lenses. By carefully selecting and adjusting these parameters, the patent achieves effective aberration correction while using plastic materials that are cheaper and lighter than glass.