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Short-Wave Infrared Longpass Filter

Midwest Optical - LP1475 View Larger Image (in new window)

Midwest Optical : LP1475

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The Midwest Optical LP1475 is a shortwave infrared longpass filter.

Longpass Filters are often used in fluorescence applications to block an excitation light source or to pass multiple emission wavelengths, improving signal to noise ratio. Longpass Filters are also commonly used in photography and astronomy

  • Economical solution for isolating specific spectral regions
  • Peak transmission ≥90%
  • StablEDGE® design reduces angular dependency and minimizes short-shifting effects
  • Anti-reflection coated for maximum transmission in VIS and NIR spectrums
  • Can be used with Shortpass Filters for a custom, fine-tuned Bandpass Filter
  • Double-side polished glass for exceptional parallelism and optical flatness
  • Exceptional surface quality; 40/20 scratch/dig
  • Useful Range : 1490-2300nm
  • Cut-on Wavelength 50% T : 1475nm
  • Tolerance : +/- 10nm
  • Peak Transmission : ≥ 90%
  • Surface Quality : 40/20

LP1475 Transmission Data (Typical)

wavelength
(nm)
transmission
(%)
2100 91.47
2090 91.89
2080 91.96
2070 92.99
2060 93.83
2050 94.85
2040 95.80
2030 96.20
2020 96.95
2010 97.07
2000 97.59
1990 98.36
1980 97.77
1970 97.37
1960 97.84
1950 98.05
1940 97.57
1930 97.22
1920 95.91
1910 95.93
1900 95.47
1890 95.24
1880 95.04
1870 94.36
1860 94.45
1850 94.00
1840 93.78
1830 93.65
1820 94.11
1810 94.17
1800 94.60
1790 94.74
1780 95.49
1770 95.95
1760 96.45
1750 97.29
1740 97.70
1730 98.46
1720 98.71
1710 98.72
1700 99.00
1690 99.00
1680 99.11
1670 98.65
1660 98.56
1650 98.33
1640 98.32
1630 98.16
1620 98.09
1610 98.05
1600 97.92
1590 97.72
1580 97.40
1570 96.86
1560 96.10
1550 95.21
1540 94.41
1530 93.65
1520 92.98
1510 91.96
wavelength
(nm)
transmission
(%)
1500 89.06
1490 81.91
1480 68.75
1470 51.06
1460 33.50
1450 20.41
1440 11.84
1430 6.74
1420 3.89
1410 2.33
1400 1.43
1390 0.91
1380 0.58
1370 0.39
1360 0.27
1350 0.17
1340 0.12
1330 0.09
1320 0.06
1310 0.05
1300 0.04
1290 0.03
1280 0.03
1270 0.02
1260 0.01
1250 0.02
1240 0.02
1230 0.01
1220 0.01
1210 0.01
1200 0.01
1190 0.01
1180 0.01
1170 0.01
1160 0.01
1150 0.01
1140 0.01
1130 0.01
1120 0.00
1110 0.01
1100 0.01
1090 0.01
1080 0.00
1070 0.00
1060 0.01
1050 0.01
1040 0.01
1030 0.01
1020 0.00
1010 0.01
1000 0.02
990 0.00
980 0.00
970 0.01
960 0.01
950 0.03
940 0.01
930 0.00
920 0.03
910 0.08
900 0.11


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Prices and specifications subject to change without notice.