| 摘要 |
A reflective material (10) of the present invention is made of an optical medium which transmits light, and has (i) a first plane which is a surface on which inclined planes are aligned with no gap therebetween (a surface on which triangular ridges or multiangular pyramids are aligned) and (ii) a second plane which is opposite to the first plane and is a flat surface or an approximately planar and gently curved surface. The reflective material (10) has the first plane having a shape and a refractive index such that at any time, light having entered the first plane or the second plane enters, at an entrance angle larger than a critical angle of total internal reflection, a corresponding opposite one of the first plane and the second plane (i) directly from an inside of the reflective material or (ii) from the inside of the reflective material after having experienced repeated internal reflection. A structure which is surrounded by the reflective material (10) so that an inside of the structure is a hollow part can have an extremely high optical Q value which prevents a leakage of light. |
