薄膜偏(pian)(pian)振(zhen)(zhen)片 (TFP) 可以成為(wei)光(guang)學設備(bei)和(he)系統(tong)中(zhong)許多(duo)應用(yong)(yong)的解決方案。例如(ru),當需要對光(guang)源進行過濾時(shi),它(ta)可以作為(wei)激光(guang)系統(tong)中(zhong)格蘭型(xing)偏(pian)(pian)振(zhen)(zhen)器(qi)的替(ti)代(dai)品(pin)。偏(pian)(pian)振(zhen)(zhen)器(qi)用(yong)(yong)于(yu)分離(li) s 偏(pian)(pian)振(zhen)(zhen)光(guang)束和(he) p 偏(pian)(pian)振(zhen)(zhen)光(guang)束。由于(yu)干涉(she),s 偏(pian)(pian)振(zhen)(zhen)和(he) p 偏(pian)(pian)振(zhen)(zhen)分開(kai) 90 度,其(qi)中(zhong) p 偏(pian)(pian)振(zhen)(zhen)幾乎完(wan)全透射通過光(guang)學元(yuan)件,而 s 偏(pian)(pian)振(zhen)(zhen)被反射,因(yin)此稱為(wei)偏(pian)(pian)振(zhen)(zhen)分束器(qi)。