| 摘要 |
PURPOSE:To reduce the reflection loss at the surface of a chip at the time of radiating light from inside the chip of a light emitting dot into the air by arranging one or more spherical lens of diameter smaller than the dimension of a light emitting area, on the surface in the light taking-out direction of the light emitting area. CONSTITUTION:A spherical lens 10 of the diameter smaller than the dimension of a light emitting area A is arranged on the surface in the light taking-out direction of the light emitting area A, and is stuck fast by a translucent adhesive 11. And the mediums of the lens 10 and the adhesive 11 have the refractive indexes lower than the medium forming the light emitting area A and higher than the air, and the medium of the adhesive 11 has the refractive index equal to the medium of the spherical lens 10. Hereby, the loss of light by the full reflection and partial reflection, which occurs at the refractive index discontinuous interface that the light passes when it is emitted from inside a chip into the air, can be reduced, and external quantum effect can be improved. |
