| 摘要 |
PURPOSE:To provide an apparatus for tracing infrared rays which has high tracing accuracy and no complicated output adjustments by employing a light receiver placed with a rotary disk having an opening between an objective lens and a single infrared ray detector. CONSTITUTION:A light receiver 1 has an infrared ray detector 6 located at a focal point of an objective lens 2 at one end opened at the lens 2. A rotary disk 3 is provided at the position in the vicinity of the detector 6. The central axis 31 of the disk 3 is spaced at predetermined distance R in parallel with an optical axis 8. A light recieving position detector 5 is disposed at the position of a radius R at opposite side between the position of the detector 6 and the central axis 31 of the disk 3, and a light emitting element 51 and a photodetector 52 are oppositely faced at both sides of the disk 3. Since there is one detector 6 in the apparatus, the light receiving output is regularly proportional to the intensity of the incident light. It can judge whether the light source is displaced in either direction from the optical axis 8 by providing transmitting portions 33a, 33b... at the disk 3 so as to increase the tracing accuracy and necessitate no output adjustments enabling an easy handling operation. |
