RLE文件中創(chuàng)建一個帶有兩個反射鏡的腔體，每個反射面位于另一個透鏡的焦點上。光通過表面4中的小孔徑光闌（通過表面2）進(jìn)入，并經(jīng)歷連續(xù)反射，直到它碰巧通過相同的孔徑光闌離開。在PER圖中，顯示單根光線的路徑。
RLE
ID CAVITY
WAVL .6562700 .5875600 .4861300
APS 1
GLOBAL
NOSEQUENTIAL
UNITS INCH
OBA -1.0000 1.00000E-02 0.3000 0.0000 0.0000 0.0000 0.3000
MARGIN 0.050000
BEVEL 0.010000
0 AIR
1 CV 0.0000000000000 TH 1.00000000 AIR
2 CAO 0.05000000 0.00000000 0.00000000
2 CV 0.0000000000000 TH 5.00000000 AIR
2 LOOSE
3 CAO 2.00000000 0.00000000 0.00000000
3 RAD -10.0000000000000 TH -5.00000000 AIR
3 EFILE EX1 2.050000 2.050000 2.060000 0.000000
3 EFILE EX2 2.050000 2.050000 0.000000
3 EFILE MIRROR 0.200000
3 REFLECTOR
3 CAPTURE
3 LOOSE
4 CAO 2.00000000 0.00000000 0.00000000
4 CAI 0.02000000 0.00000000 0.00000000
4 RAD 10.0000000000000 TH -0.99990000 AIR
4 EFILE EX1 2.050000 2.050000 2.060000 0.000000
4 EFILE EX2 2.050000 2.050000 0.000000
4 EFILE MIRROR -0.200000
4 REFLECTOR
4 CAPTURE
4 LOOSE
5 CAO 0.50000000 0.00000000 0.00000000
5 CV 0.0000000000000 TH 0.00000000 AIR
5 CAPTURE
END
