| 摘要 |
<p>The rod (1) has a reflective phase grating provided with alternating high and low refractive layers (6, 7, 5a, 5b) in a layer stack (3). The stack is arranged on a substrate (2). The high and low refractive layers are made of silicon and silicon dioxide, respectively. A base layer (4) e.g. nickel-chromium layer, facing the substrate is provided in the stack. Layer thickness in the stack is selected such that a light used for sampling the rod is diffracted in a diffracting arrangement. The substrate is made of zerodur(RTM: Glass ceramic).</p> |
