Studies on Mega-Pixel Cell Phone Lenses Based on Aspheric Optics
According to the principle of optical design, two kinds of 2 Mega-pixel cell phone camera lenses are proposed. One is made up of three plastic (3P) lenses; the other is made up of two plastic lenses and one glass (2P1G) lens. The shapes of all lenses are aspheric. By comparison, the overall length of 2P1G lens is much less than that of 3P lens. Furthermore, in FOV the former is 5 degrees larger than the latter. At the same time, in distortion of the maximum field angle, the former is much less. The other aberrations of 2P1G lens are almost same to those of 3P lens. Therefore, in cell phone camera lens design, it’s recommended to adopt one aspheric glass lens to improve the performance and compactness though the cost will become a little higher due to the introduction of aspheric glass lens. However, the cost of aspheric glass lens could be reduced tremendously by a new cost-effective manufacturing method compression molding technology.
Yongping Zhang, Linhua Zhou and Elwin Mao
Y. J. Zhu et al., "Studies on Mega-Pixel Cell Phone Lenses Based on Aspheric Optics", Applied Mechanics and Materials, Vol. 109, pp. 441-444, 2012