| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical lens capable of uniformizing the distribution of light quantity in a detecting area and an optical sensor capable of reducing the number of assembling components of an optical system and easily adjusting the arranging position of the optical components. SOLUTION: A shielding means is formed on any surface of the light incident surface 67 of an optical lens 66, a transmitting surface 68 or a reflection surface 69 when the reflection surface 69 is formed on the lens 66 and an aperture part 71 or a reflection body (in the case of the reflection surface 69), being made narrow in a part of much light quantity and wide in a part of less light quantity, is formed. The optical lens 66 thus constituted is used for obtaining the parallel light beam of an optical fiber type optical sensor, by uniformizing the distribution of light quantity in the detecting area and increasing the light quantity, the detecting accuracy of an object to be detected is easily increased and the detecting distance is lengthened.</p> |
