High Angle Optical Ray Separator.
DEPARTMENT OF THE NAVY WASHINGTON D C
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This invention provides a connector for coupling two optical transmission lines together for transmitting optical radiation which makes an angle with the fiber axis up to a critical angle. The connector specifically couples optical radiation having an angle greater than the cirtical angle out of the transmission line for other uses. The main section of the coupler is provided with a special coating which has an index of refraction less than that of the main section. Thus, radiation up to the critical angle will be reflected and pass through the coupler. Radiation with a greater angle than critical will not be reflected by the coating and will pass into a tapered slab secured above the coating. The tapered surface will reflect the radiation to the end where it will pass out the end surface or be reflected by a mirror on the end surface.
- Fiber Optics and Integrated Optics