| 摘要 |
PROBLEM TO BE SOLVED: To provide a camera module with no occurrence of moire even when a single lens is used, which is small-sized, light-weight, as well as being inexpensive because the optical system can be the single lens, and is suitable for a portable telephone or a smartphone.SOLUTION: The camera module includes a single lens 1 with a double refraction aspheric surface and an optical sensor 2 for detecting an optical image by the single lens 1 with the double refraction aspheric surface. In this case, light is projected so as to be tilted to the optical axis of the single lens 1 and a calculator is provided for correcting an output signal from the optical sensor 2 so that space frequency is a Nyquist frequency or less, and thereby distortion in an image due to the lens is corrected. |
