The SNR, the antenna condition and the Braggcondition as well as achromatism in optical design are discussed.
讨论了在光学设计中的信噪比要求，天线条件，色差兼容和布喇格条件。
2
When a volume holographic grating is readout under off-Braggcondition, determining the direction of the diffracted beam is an important issue in the coupled-wave theory of volume gratings.
体全息光栅的读出偏离布拉格条件时，衍射光方向的确定是体光栅耦合波理论中的一个重要问题。
3
The result on site monitoring shows that the smart Fiber Bragg Grating bars can monitor the stained condition of cables effectively.