| 摘要 |
<p>PURPOSE:To improve the position detecting sensitivity of the title device on the long-distance side and perform linearity correction on the output signal of the device by arranging a plurality of photoelectric conversion elements in a prescribed direction and coupling the elements to each other through resistors, and then, making the resistances of the resistors larger than those of their preceding resistors. CONSTITUTION:An optical position detecting element is constituted by arranging a plurality of photoelectric conversion elements PD1-PDn in a prescribed direction and coupling the elements PDi-PDn to each other through resistors R1-R(n-1), and photoelectric current output terminals T1 and T2 are provided to the position detecting element. The resistance Rj of the j-th resistor (j=2,..., n-1) is made larger than that R(j-1) of the (j-1)-th resistor (Rj>R(j-1)). As a result, the position detecting characteristics of the position detecting device become nonlinear and the position detecting sensitivity of the device can vary depending upon the incident position of light. Therefore, the position detecting sensitivity of the device on the long-distance side can be improved and linearity correction of the output signal of the device can be performed.</p> |
