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照片标定

太阳光谱中的夫琅和费线最为明显:

以上面照片为基准的测量各谱线在照片上的位置:

< <
谱线
照片位置
波长
元素
g
233
422.674
Ca I
283
427.1774
Fe I
G
322
430.78
Fe Ca
340
432.5775
Fe I2
f
354
434.0475
H
e
398
438.3557
Fe I
427
441.5135
Fe I2
d
634
466.81
Fe I
F
763
486.1342
H
781
489.1502
Fe I
798
492.0514
Fe I2
c
819.5
495.7613
Fe I2
b4,5
929
516.7327
Mg I2
b2
930
517.2698
Mg I
b1
936
518.3619
Mg I
E
975
526.955
Fe I2
1001
532.8051
Fe I
1079
552.8418
Mg I
D
1198
589.296
Na I
a
1296
628.15
O2
C
1355
656.2808
H

得出位置-波长曲线和拟合公式。

由于拍摄太阳光谱时,狭缝后的准直透镜的焦点没有严格调节到狭缝上,所以拍摄的太阳光谱的比例尺比物端光谱的略小。但两者之间几乎完全成线性关系:

使用阳光白平衡在照片RGB通道的值。红外截止滤镜的效果明显。