Kopp 1290  
Note: Graph and tabular data at 5.00 mm
Filter Specifications
Transmission at 740 nm must be < 1%
Transmission at 800 9 nm must be > 45%
Transmission at 900 nm must be > 80%
Physical Properties
Nominal Thickness Range 4.3 - 5.8 mm
Refractive Index nD = 1.53
Density 2.67 g/cm3
Thermal Linear Expansion 110E-7 /C (30-300 C)
Strain Temperature 492 C
Transition Temperature 510 C
Annealing Temperature 526 C
Deformation Temperature 563 C
                   
                   
    Kopp 1290  
Wavelength Transmission Wavelength Transmission Wavelength Transmission
(nm) (%) (nm) (%) (nm) (%)
200 0.00 435 0.00 670 0.00
205 0.00 440 0.00 675 0.00
210 0.00 445 0.00 680 0.00
215 0.00 450 0.00 685 0.00
220 0.00 455 0.00 690 0.00
225 0.00 460 0.00 695 0.00
230 0.00 465 0.00 700 0.00
235 0.00 470 0.00 705 0.00
240 0.00 475 0.00 710 0.01
245 0.00 480 0.00 715 0.01
250 0.00 485 0.00 720 0.02
255 0.00 490 0.00 725 0.03
260 0.00 495 0.00 730 0.06
265 0.00 500 0.00 735 0.11
270 0.00 505 0.00 740 0.19
275 0.00 510 0.00 745 0.34
280 0.00 515 0.00 750 0.59
285 0.00 520 0.00 755 1.05
290 0.00 525 0.00 760 1.83
295 0.00 530 0.00 765 3.16
300 0.00 535 0.00 770 5.28
305 0.00 540 0.00 775 8.54
310 0.00 545 0.00 780 13.18
315 0.00 550 0.00 785 19.34
320 0.00 555 0.00 790 26.80
325 0.00 560 0.00 795 35.17
330 0.00 565 0.00 800 43.70
335 0.00 570 0.00 805 51.84
340 0.00 575 0.00 810 59.12
345 0.00 580 0.00 815 65.25
350 0.00 585 0.00 820 69.92
355 0.00 590 0.00 825 73.60
360 0.00 595 0.00 830 76.14
365 0.00 600 0.00 835 78.18
370 0.00 605 0.00 840 79.78
375 0.00 610 0.00 845 80.88
380 0.00 615 0.00 850 81.48
385 0.00 620 0.00 855 81.90
390 0.00 625 0.00 860 82.02
395 0.00 630 0.00 865 82.36
400 0.00 635 0.00 870 82.29
405 0.00 640 0.00 875 82.53
410 0.00 645 0.00 880 83.07
415 0.00 650 0.00 885 82.05
420 0.00 655 0.00 890 82.89
425 0.00 660 0.00 895 82.21
430 0.00 665 0.00 900 82.11