Kopp 4309  
Note: Graph and tabular data at 3.30 mm
Filter Specifications
Transmission at 665 nm must be 15 ± 0.7% 
Difference between 15% and 60% transmission must 102 ± 8 nm
Maximum transmission must be at 470 ± 10 nm
Physical Properties
Nominal Thickness Range 3.5 - 4.5 mm
Refractive Index nD = 1.51
Density 2.50 g/cm3
Thermal Linear Expansion 95E-7 /șC (30-300 șC)
Strain Temperature 474 șC
Annealing Temperature 511 șC
Deformation Temperature 685 șC
                   
    Kopp 4309  
Wavelength Transmission Wavelength Transmission Wavelength Transmission
(nm) (%) (nm) (%) (nm) (%)
200 0.01 435 87.28 670 13.68
205 0.01 440 87.42 675 12.84
210 0.01 445 87.62 680 12.05
215 0.01 450 87.73 685 11.38
220 0.00 455 87.81 690 10.77
225 0.00 460 87.89 695 10.21
230 0.00 465 87.89 700 9.74
235 0.00 470 87.71 705 9.28
240 0.00 475 87.57 710 8.90
245 0.00 480 87.32 715 8.54
250 0.00 485 86.90 720 8.22
255 0.00 490 86.47 725 7.95
260 0.00 495 85.91 730 7.70
265 0.00 500 85.09 735 7.49
270 0.00 505 84.11 740 7.30
275 0.00 510 82.92 745 7.14
280 0.00 515 81.58 750 7.00
285 0.00 520 79.95 755 6.89
290 0.00 525 78.14 760 6.76
295 0.00 530 76.20 765 6.70
300 0.00 535 73.95 770 6.63
305 0.00 540 71.51 775 6.58
310 0.02 545 68.97 780 6.55
315 0.28 550 66.33 785 6.53
320 1.70 555 63.40 790 6.50
325 6.06 560 60.51 795 6.53
330 14.41 565 57.60 800 6.55
335 26.08 570 54.52 805 6.56
340 38.40 575 51.52 810 6.62
345 50.16 580 48.58 815 6.67
350 59.84 585 45.71 820 6.71
355 67.57 590 42.84 825 6.81
360 72.89 595 40.10 830 6.90
365 76.94 600 37.47 835 7.01
370 79.38 605 34.95 840 7.11
375 80.73 610 32.54 845 7.24
380 81.71 615 30.24 850 7.39
385 83.18 620 28.09 855 7.50
390 84.67 625 26.08 860 7.73
395 85.34 630 24.19 865 7.80
400 86.06 635 22.44 870 7.91
405 86.31 640 20.84 875 8.17
410 86.62 645 19.34 880 8.23
415 86.88 650 17.98 885 8.36
420 87.02 655 16.74 890 8.71
425 87.24 660 15.62 895 8.71
430 87.31 665 14.60 900 9.32