Kopp Didymium Calibrating Filter - 5121

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Didymium Calibrating Filter - 5121

Note: Graph and tabular data at 5.50 mm
Filter Specifications
Transmission at 580 nm must be < 0.37%
Transmission at 552 nm must be > 75%
Physical Properties
Nominal Thickness Range 4.9 - 5.5 mm
Refractive Index nD = 1.54
Density 2.78 g/cm3
Thermal Linear Expansion 104E-7 /ºC (30-300 ºC)
Strain Temperature 508 ºC
Annealing Temperature 541 ºC
Deformation Temperature 704 ºC
Didymium Calibrating Filter - 5121
Wavelength
Transmission
Wavelength
Transmission
Wavelength
Transmission
(nm)
(%)
(nm)
(%)
(nm)
(%)
200
0.00
435
32.05
670
77.15
205
0.00
440
24.21
675
73.59
210
0.00
445
26.19
680
66.72
215
0.00
450
32.77
685
59.73
220
0.00
455
41.50
690
68.54
225
0.00
460
38.51
695
77.15
230
0.00
465
34.59
700
81.42
235
0.00
470
29.70
705
82.84
240
0.00
475
31.45
710
83.29
245
0.00
480
25.94
715
82.54
250
0.00
485
38.67
720
80.05
255
0.00
490
59.87
725
73.28
260
0.00
495
66.04
730
51.17
265
0.00
500
61.24
735
8.70
270
0.00
505
52.58
740
2.06
275
0.00
510
35.47
745
3.21
280
0.00
515
27.78
750
2.85
285
0.00
520
35.15
755
9.58
290
0.00
525
15.93
760
26.58
295
0.00
530
13.00
765
44.30
300
0.00
535
27.91
770
59.17
305
0.00
540
57.12
775
64.25
310
0.00
545
72.81
780
56.98
315
0.00
550
77.05
785
39.45
320
0.00
555
76.60
790
19.01
325
0.00
560
72.78
795
6.63
330
0.00
565
54.65
800
2.96
335
0.00
570
3.07
805
0.76
340
0.00
575
0.17
810
1.16
345
0.00
580
0.34
815
9.97
350
0.00
585
0.02
820
25.45
355
0.00
590
0.22
825
41.93
360
0.00
595
2.60
830
56.79
365
0.01
600
13.91
835
70.04
370
0.17
605
33.87
840
77.82
375
1.02
610
50.29
845
80.40
380
3.28
615
73.53
850
79.67
385
7.57
620
79.45
855
73.80
390
14.14
625
77.12
860
58.08
395
22.03
630
76.94
865
42.33
400
30.14
635
80.21
870
36.86
405
38.16
640
81.80
875
29.26
410
45.59
645
82.89
880
19.55
415
51.26
650
83.17
885
30.79
420
54.82
655
83.38
890
44.65
425
56.87
660
83.11
895
55.69
430
38.54
665
81.19
900
64.98


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