| 摘要 |
PURPOSE:To reduce the cost of a device by the constitution wherein the light outputted from an optical fiber for inputting is passed through a prism to a slit plate thereby enabling the use of an optical fiber for inputting having a larger bore diameter. CONSTITUTION:The light conducted to an optical connector 6 for inputting from an external light source passes through an optical fiber 7 and enters the photodetection face of a rectangular prism 8. The light is reflected on the reflection face thereof, which is sloped surface, and the light out from the output face of the prism enters a stationary slit place 10. The light past said plate arrives at a rotary slit plate 2 and the light past the plate 2 is condensed by condenser lenses 11 and 12 provided for each of channels and is conducted respectively through optical fibers 13, 14 for photodetection to optical connectors 15, 16 for outputting. Then, if the fiber 7 of a larger bore is diameter is used, just one optical fiber is required even with a large number of channels, and the cost of the device is reduced. |
