| 摘要 |
PROBLEM TO BE SOLVED: To improve the decoration effect of a decorative product, to make writing easy for a writing instrument and to increase the view field and to improve the appearance for electric wires by checking an object b or the state in the back of an opaque x. SOLUTION: By the method for viewing an object in the back of an opaque and by the optical refractor to perform the above method, an opaque (a) is coated with a transparent light refractive material x and determining the form of the transparent light refractor x in such a manner that an object b in the back of the opaque (a) can be observed from the front face of the opaque (a) by the combination of incidence, refraction, straight propagation, transmission, total reflection and so on according to the refractive index. |
