| dc.description.abstract | This paper presents two kinds of 3X zoom lens design used for cell phone, including 13 million pixels and 8 million pixels of the cell phone. The 13 million pixel sensor is based on OV13855, the pixel size is 1.12 μm, the effective focal length of the zoom lens is 5.909 mm to 17.327 mm, the half angle is 9.685 degrees to 26.567 degrees, the F-number is 3.05 to 5.5, and the image height is 2.971 mm. The eight-megapixel sensor is using the CMOS sensor of the OV8856, with a pixel size of 1.12 μm. The zoom lens has a effective focal length of 4.514 mm to 13.442 mm, a half-view angle of 9.710 degrees to 27.000 degrees, an F-number of 3.05 to 5.5, and an image height of 2.285 mm.
Periscope-type cell phone zoom lens design must be placed into in the phone. Due to the limitation of the thickness of the cell phone, when the thickness of the prism or the aperture size of the lens is larger than the thickness of the cell phone, the cell phone lens cannot be placed in the cell phone. Assuming that the thickness of the prism or the maximum size of the lens aperture is the depth of the lens, the depth of the lens must be less than the thickness of the cell phone before it can be placed in the mobile phone.
The thickness of the mechanism is related to the lens F-number, the entrance pupil diameter, and the imaging height, 13 million pixels, the imaging height is 2.971 mm, and the mechanism thickness is 14 mm. With 8 million pixels, the lens imaging height is reduced from 2.971 mm to 2.285 mm, and the thickness of the mechanism is reduced to 10.8 mm. The ratio of the sensor is 16:9, and the thickness of the mechanism is reduced to 5.811 mm. In the wide angle part of the zoom lens The lens has a larger diameter, the F-number is increased from 3.05 to 3.5, and the thickness of the mechanism can be reduced to 5.377 mm. Finally, using a five-million-pixel sensor, the imaging height was reduced from 2.971 mm to 1.923 mm, and the thickness of the mechanism was finally adjusted to 4.495 mm.
If 5.377mm can′t be put into the Iphone, we hope to achieve within 4.5mm, and finally use 5 million to achieve the purpose, so that the thickness of the mechanism can be reduced to 4.495mm. | en_US |