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Kopp IR Absorbing/VIS Transmitting 3961
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IR Absorbing/VIS Transmitting 3961
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Note: Graph and tabular data at 2.65 mm
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Filter Specifications
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| Transmission for Total Radiation (Illuminant 2854 °K) must be 1.6 ± 0.5% | |
| Minimum Value for Luminous Transmittance (Illuminant 2854 °K) must be 18.6% | |
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Physical Properties
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| Nominal Thickness Range | 2.15 - 2.85 mm |
| Refractive Index | nD = 1.50 |
| Density | 2.41 g/cm3 |
| Thermal Linear Expansion | 48E-7 /ºC (30-300 ºC) |
| Strain Temperature | 533 ºC |
| Annealing Temperature | 569 ºC |
| Deformation Temperature | 766 ºC |
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IR Absorbing/VIS Transmitting 3961
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Wavelength
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Transmission
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Wavelength
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Transmission
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Wavelength
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Transmission
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(nm)
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(%)
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(nm)
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(%)
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(nm)
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(%)
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200
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0.00
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435
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27.63
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670
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8.60
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205
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0.00
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440
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28.48
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675
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7.75
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210
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0.00
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445
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29.54
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680
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6.93
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215
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0.00
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450
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30.70
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685
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6.18
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220
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0.01
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455
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31.80
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690
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5.49
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225
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0.00
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460
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32.68
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695
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4.86
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230
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0.00
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465
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33.46
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700
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4.27
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235
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0.00
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470
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34.19
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705
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3.77
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240
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0.00
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475
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34.97
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710
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3.30
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245
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0.00
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480
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35.63
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715
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2.88
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250
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0.00
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485
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36.18
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720
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2.51
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255
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0.00
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490
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36.55
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725
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2.18
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260
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0.01
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495
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36.87
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730
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1.89
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265
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0.00
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500
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37.09
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735
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1.63
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270
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0.00
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505
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37.22
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740
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1.39
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275
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0.00
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510
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37.29
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745
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1.20
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280
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0.00
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515
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37.17
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750
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1.03
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285
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0.00
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520
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36.84
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755
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0.88
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290
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0.00
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525
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36.34
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760
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0.75
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295
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0.00
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530
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35.94
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765
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0.63
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300
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0.00
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535
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35.58
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770
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0.54
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305
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0.00
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540
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35.05
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775
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0.46
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310
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0.00
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545
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34.44
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780
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0.39
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315
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0.00
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550
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33.81
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785
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0.33
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320
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0.00
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555
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33.29
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790
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0.29
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325
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0.00
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560
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32.80
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795
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0.24
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330
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0.00
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565
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32.25
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800
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0.20
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335
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0.00
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570
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31.49
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805
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0.17
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340
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0.03
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575
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30.59
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810
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0.15
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345
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0.13
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580
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29.58
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815
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0.13
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350
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0.41
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585
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28.48
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820
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0.11
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355
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1.00
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590
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27.32
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825
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0.10
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360
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1.97
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595
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26.10
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830
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0.08
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365
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3.44
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600
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24.87
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835
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0.07
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370
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5.23
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605
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23.60
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840
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0.07
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375
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7.01
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610
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22.28
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845
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0.05
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380
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9.03
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615
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20.98
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850
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0.05
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385
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11.56
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620
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19.67
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855
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0.04
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390
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14.15
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625
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18.36
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860
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0.03
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395
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16.51
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630
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17.09
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865
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0.02
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400
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18.56
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635
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15.84
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870
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0.04
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405
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20.39
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640
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14.65
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875
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0.04
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410
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21.99
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645
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13.51
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880
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0.02
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415
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23.45
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650
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12.45
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885
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0.02
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420
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24.78
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655
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11.41
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890
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0.00
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425
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25.89
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660
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10.45
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895
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0.05
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430
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26.77
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665
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9.49
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900
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0.08
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