| 摘要 |
PROBLEM TO BE SOLVED: To facilitate correction by performingθcharacteristic correction of each element only by multiplication and division after the output of each photoelectric conversion element is logarithmically converted. SOLUTION: When a photosensitive part 1 receives light, the output of each photoelectric conversion element 1a to n of the part 1 is undergone logarithmic conversion processing in a logarithm converting part 2 and after that, each element 1a to n is successively read by a reading part 3 and outputted to aθcorrecting circuit 4, where aθcharacteristic of the elements 1a to n is corrected into a prescribed characteristic. The output of light receiving amount of the elements 1a to n becomes linear when theθcharacteristic is 1, but it becomes non-linear when it is not 1. However, in the part 2, with the output of each element 1a to n converted logarithmically, it maintains its linearity when aθcharacteristic is 1 and also has its linearity even when it is not 1, and an elementθcharacteristic is represented as an inclination of linearity. Therefore, an output of each element 1a to n which is gone through the part 2 is undergone only multiplication and division to correct the inclination of linearity so that theθcharacteristic of each element 1a to n can easily be corrected.
|
