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Short-wave Infrared Longpass Filter

Midwest Optical - LP1850 View Larger Image (in new window)

Midwest Optical : LP1850

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The Midwest Optical LP1850 is a short-wave 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 : 1900-12,000nm
  • Cut-on Wavelength 50% T : 1850nm
  • Tolerance : +/-10nm
  • Peak Transmission : ≥90%
  • Surface Quality : 40/20

LP1850 Transmission Data (Typical)

wavelength
(nm)
transmission
(%)
2300 93.83
2290 93.76
2280 93.65
2270 93.54
2260 93.40
2250 93.25
2240 93.10
2230 92.96
2220 92.82
2210 92.67
2200 92.46
2190 92.27
2180 92.09
2170 91.93
2160 91.70
2150 91.52
2140 91.36
2130 91.20
2120 91.05
2110 90.89
2100 90.83
2090 90.73
2080 90.60
2070 90.54
2060 90.52
2050 90.54
2040 90.55
2030 90.50
2020 90.45
2010 90.38
2000 90.28
1990 90.09
1980 89.71
1970 88.95
1960 87.66
1950 85.86
1940 83.65
1930 81.23
1920 78.52
1910 75.52
1900 72.37
1890 68.92
1880 64.93
1870 60.32
1860 55.24
1850 49.72
1840 43.76
1830 37.60
1820 31.52
1810 25.56
1800 19.84
1790 14.78
1780 10.68
1770 7.51
1760 5.14
1750 3.42
1740 2.19
1730 1.35
1720 0.78
1710 0.41
1700 0.18
1690 0.04
1680 0.00
1670 0.00
1660 0.00
1650 0.00
1640 0.01
1630 0.01
1620 0.00
1610 0.01
wavelength
(nm)
transmission
(%)
1600 0.01
1590 0.01
1580 0.01
1570 0.01
1560 0.01
1550 0.01
1540 0.01
1530 0.01
1520 0.01
1510 0.01
1500 0.01
1490 0.01
1480 0.01
1470 0.01
1460 0.00
1450 0.00
1440 0.01
1430 0.01
1420 0.01
1410 0.01
1400 0.01
1390 0.01
1380 0.01
1370 0.01
1360 0.01
1350 0.00
1340 0.01
1330 0.01
1320 0.01
1310 0.01
1300 0.01
1290 0.00
1280 0.00
1270 0.01
1260 0.01
1250 0.01
1240 0.01
1230 0.01
1220 0.01
1210 0.01
1200 0.00
1190 0.01
1180 0.01
1170 0.01
1160 0.01
1150 0.01
1140 0.01
1130 0.01
1120 0.01
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 0.01
1010 0.01
1000 0.01
990 0.01
980 0.01
970 0.01
960 0.01
950 0.01
940 0.01
930 0.01
920 0.02
910 0.02
900 0.02


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Prices and specifications subject to change without notice.