| 摘要 |
PURPOSE:To make machining work easy and to miniaturize the whole device by reflecting light from a light emitting means to the side of an optical information recording carrier on one side of a beam splitting means, making the reflected light incident to the other side by refracting and transmitting it on one side, and splitting this incident light into transmitted light and diffracted light. CONSTITUTION:The light from a light emitting means 1 is reflected to the side of the optical information recording carrier on one side 21 of a beam splitting means 2, and the light reflected from the side of the optical information recording carrier is made incident to another side 22 by refracting and transmitting it on the one side 21. This incident light is transmitted through the other side 22 and guided into an optical waveguide 4 by the diffracting operation of a light diffracting means 3. Thus, since the light can be made incident to the light diffracting means 3 and splitted into the transmitted light and the diffracted light by the reflection only on one side 21 of the light splitting means 2, the machining work can be easily executed when manufacturing the splitter 2, and the device can be miniaturized as a whole. |
