Kopp 3850  
Note: Graph and tabular data at 3.90 mm
Filter Specifications
Transmission must be < 0.5% at 334 nm
Transmission must be > 65% at 405 nm
Physical Properties
Nominal Thickness Range 3.9 - 4.1 mm
Refractive Index nD = 1.52
Density 2.53 g/cm3
Thermal Linear Expansion 108E-7 /ºC (30-300 ºC)
Strain Temperature 477 ºC
Annealing Temperature 513 ºC
Deformation Temperature 669 ºC
                   
    Kopp 3850  
Wavelength Transmission Wavelength Transmission Wavelength Transmission
(nm) (%) (nm) (%) (nm) (%)
200 0.00 435 76.29 670 81.44
205 0.00 440 77.16 675 81.71
210 0.00 445 77.90 680 81.94
215 0.00 450 78.73 685 82.25
220 0.00 455 79.66 690 82.29
225 0.00 460 80.27 695 82.48
230 0.00 465 81.00 700 82.41
235 0.00 470 81.58 705 82.34
240 0.00 475 82.19 710 82.37
245 0.00 480 82.69 715 82.42
250 0.00 485 83.12 720 82.36
255 0.00 490 83.49 725 82.21
260 0.00 495 83.93 730 82.09
265 0.00 500 84.32 735 81.86
270 0.00 505 84.55 740 81.77
275 0.00 510 84.60 745 81.42
280 0.00 515 84.68 750 81.28
285 0.00 520 84.73 755 81.12
290 0.00 525 84.78 760 80.70
295 0.00 530 84.75 765 80.61
300 0.00 535 84.69 770 80.37
305 0.00 540 84.63 775 80.05
310 0.00 545 84.49 780 79.90
315 0.00 550 84.34 785 79.58
320 0.00 555 84.34 790 79.42
325 0.00 560 84.08 795 79.14
330 0.00 565 83.68 800 78.89
335 0.00 570 83.18 805 78.66
340 0.00 575 82.75 810 78.47
345 0.00 580 82.21 815 78.29
350 0.00 585 81.69 820 78.01
355 0.00 590 81.31 825 77.69
360 0.00 595 80.99 830 77.52
365 0.00 600 80.79 835 77.21
370 0.00 605 80.60 840 77.27
375 0.00 610 80.41 845 77.08
380 26.61 615 80.32 850 76.90
385 37.07 620 80.13 855 76.74
390 46.76 625 80.23 860 76.25
395 54.67 630 80.22 865 75.93
400 60.86 635 80.09 870 75.50
405 65.45 640 80.18 875 75.16
410 68.64 645 80.26 880 74.99
415 70.84 650 80.46 885 74.72
420 72.68 655 80.68 890 74.32
425 74.22 660 80.89 895 74.99
430 75.22 665 81.16 900 74.83