Kopp 2408  
Note: Graph and tabular data at 4.18 mm
Filter Specifications
Transmission must be 37% between 619 nm and 628 nm (cut-off wavelength)
Transmission must be 80% from 658 nm to 750 nm
Transmission must be < 0.5% at wavelength shorter than 599 nm
Difference between 15% and 60% transmission must be < 15 nm
Physical Properties
Nominal Thickness Range 1.4 - 4.6 mm
Refractive Index nD = 1.50
Density 2.41 g/cm3
Thermal Linear Expansion 40E-7 /C (30-300 C)
Strain Temperature 517 C
Annealing Temperature 526 C
Deformation Temperature 707 C
                   
    Kopp 2408  
Wavelength Transmission Wavelength Transmission Wavelength Transmission
(nm) (%) (nm) (%) (nm) (%)
200 0.00 435 0.00 670 85.15
205 0.00 440 0.00 675 85.54
210 0.00 445 0.00 680 85.95
215 0.00 450 0.00 685 86.24
220 0.00 455 0.00 690 86.46
225 0.00 460 0.00 695 86.63
230 0.00 465 0.00 700 86.93
235 0.00 470 0.00 705 87.09
240 0.00 475 0.00 710 87.10
245 0.00 480 0.00 715 87.26
250 0.00 485 0.00 720 87.28
255 0.00 490 0.00 725 87.39
260 0.00 495 0.00 730 87.39
265 0.00 500 0.00 735 87.44
270 0.00 505 0.00 740 87.30
275 0.00 510 0.00 745 87.48
280 0.00 515 0.00 750 87.49
285 0.00 520 0.00 755 87.30
290 0.00 525 0.00 760 87.38
295 0.00 530 0.00 765 87.30
300 0.00 535 0.00 770 87.24
305 0.00 540 0.00 775 87.30
310 0.00 545 0.00 780 87.17
315 0.00 550 0.00 785 87.17
320 0.00 555 0.00 790 87.01
325 0.00 560 0.00 795 86.94
330 0.00 565 0.00 800 86.88
335 0.00 570 0.00 805 86.83
340 0.00 575 0.00 810 86.65
345 0.00 580 0.00 815 86.71
350 0.00 585 0.00 820 86.66
355 0.00 590 0.00 825 86.44
360 0.00 595 0.01 830 86.47
365 0.00 600 0.04 835 86.16
370 0.00 605 0.15 840 86.16
375 0.00 610 0.77 845 85.96
380 0.00 615 3.94 850 86.06
385 0.00 620 15.52 855 85.76
390 0.00 625 37.53 860 85.47
395 0.00 630 58.19 865 85.87
400 0.00 635 70.69 870 85.38
405 0.00 640 77.00 875 86.04
410 0.00 645 80.32 880 85.83
415 0.00 650 82.15 885 85.67
420 0.00 655 83.28 890 85.22
425 0.00 660 83.93 895 85.07
430 0.00 665 84.70 900 83.83