Kopp 3131  
Note: Graph and tabular data at 2.00 mm
Filter Specifications
Transmission at 279 nm must be between 15.1% and 34.6%
Transmission at 460 nm must be between 3.9% and 12.1%
Physical Properties
Nominal Thickness Range 2.0 - 2.5 mm
Refractive Index nD = 1.51
Density 2.84 g/cm3
Thermal Linear Expansion 100E-7 /ēC (30-300 ēC)
Strain Temperature 450 ēC
Annealing Temperature 492 ēC
Deformation Temperature 691 ēC
                   
    Kopp 3131  
Wavelength Transmission Wavelength Transmission Wavelength Transmission
(nm) (%) (nm) (%) (nm) (%)
200 0.00 435 87.16 670 89.89
205 0.00 440 72.95 675 91.22
210 0.00 445 1.21 680 91.41
215 0.00 450 24.04 685 91.34
220 0.00 455 22.32 690 91.42
225 0.00 460 11.40 695 91.41
230 0.00 465 58.13 700 91.22
235 0.00 470 79.09 705 91.52
240 0.07 475 78.28 710 91.41
245 0.69 480 84.60 715 91.37
250 2.11 485 76.88 720 91.30
255 4.88 490 81.19 725 91.29
260 8.09 495 89.33 730 91.28
265 13.41 500 91.17 735 91.16
270 19.47 505 91.25 740 91.14
275 25.42 510 91.08 745 91.09
280 26.64 515 91.17 750 91.05
285 41.17 520 90.86 755 91.06
290 41.10 525 89.60 760 91.27
295 56.05 530 83.08 765 91.06
300 66.05 535 49.50 770 91.07
305 72.12 540 63.60 775 91.16
310 76.48 545 75.53 780 91.10
315 79.89 550 82.82 785 91.01
320 82.34 555 89.40 790 91.21
325 84.29 560 91.33 795 91.12
330 84.16 565 91.42 800 91.11
335 78.77 570 91.43 805 91.10
340 84.34 575 91.43 810 91.30
345 82.25 580 91.44 815 91.14
350 84.16 585 91.35 820 91.17
355 84.07 590 91.46 825 91.18
360 24.55 595 91.34 830 91.14
365 67.97 600 91.18 835 91.24
370 84.58 605 91.20 840 91.17
375 90.42 610 91.29 845 91.14
380 86.64 615 91.15 850 91.43
385 83.22 620 90.75 855 91.08
390 88.71 625 89.47 860 91.43
395 90.82 630 84.46 865 90.82
400 90.86 635 70.10 870 90.53
405 90.80 640 70.96 875 90.81
410 88.55 645 75.74 880 90.03
415 76.92 650 75.86 885 91.96
420 69.23 655 83.46 890 90.33
425 79.41 660 82.52 895 91.44
430 88.37 665 83.84 900 89.85