| 摘要 |
The network includes k ribbed sub-network planes arranged side by side. The sub-network planes being shifted in height with respect to each other along the normal to the plane of the ribbed reflecting surfaces, this permits the reduction in the optical step of the network to the difference of the optical step between the two ends of the sub-network. The sub-networks have the same width and density of ribs, the rib of row (i) of the sub-network being situated a same plane parallel to the network plane. The reflecting surface of the ribs makes an angle of inclination (i) to the plane of the corresponding sub-network. The plane of each sub-network makes an angle of inclination (i) with the plane of the network. Network is made from glass or silica slice by mechanical engraving or holographic device. |
