| 摘要 |
PURPOSE:To improve condensing efficiency by making a condenser lens and a single cored optical fiber correspond to each other and making all the focusing light from the condenser lenses incident to the optical fibers. CONSTITUTION:Plural condenser units 32 are provided in the front end of a moving frame 30, and the unit 32 has a structure in which many small diameter condenser lenses 34 are fixed on one surface of a box body consisting of a lightweight metal or the like with the respective optical axes paralleled to each other. The incident ends of single cored optical cores 36 are respectively disposed to the condensing top parts of the lenses 34, and the incident end faces are made coincide with the optical axes of the lenses 34. The other terminals of the fibers 36 are focused to a bundled optical fiber cable 38 as a light condensing and propagating path. The lenses 34 face, one to one, to the fibers 36 in the unit 32 in the above-mentioned way and therefore the incident efficiency in the incident part to the optical fibers from the condenser lenses is improved. |
