Considering the contribution of other factors , to improve design accuracy , avoid optical path deviation , reduce insert dissipation and increase the manipuility of the device is our purpose . the simplest type of flat - plate achromatic optical phase retarders is made from a single birefringence material 實踐證明,理想的消色差波片應當以簡便片狀雙折射型設計為主,在此基礎上考慮其他方面因素的影響,提高其設計精度,避免光路系統偏折,降低插入損耗,從而提高器件的可操作性。