Long Wave Pass Filter

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Long pass filter Description

Long wave Pass Filter, or call Long pass filter, it is a filter in which the pass band is a wavelength range higher than the wavelength range that is blocked. Long pass filters pass all wavelengths longer than the cut off wavelength. Long pass filters include cold mirrors, colored glass filters, and thermo set ADC (optical cast plastic) filters.
Long-wave pass filter is thin plate plates with long/pass-wave pass coating on one side, the other side is AR coating.

fgr_long pass filter curve

Difference between long pass filter, short pass filter, dichroic filter and IR/UV cut Filter

Long pass Filters is one of the cut-off filters, it can transmit wavelengths greater than the cut-on wavelength, while Shortpass Filters transmit wave-  lengths shorter than the cut-off wavelength. Dichroic filters perform the same function, while guaranteeing that the  rejected wavelengths are reflected. Any of these filters can be designed for 0  or 45  angle of incidence. Edge and Di- chroic Filters are commonly used in Fluorescence instrumentation, Heat Rejection Applications, and as Color Filters.  While somewhat angle sensitive, they are more forgiving than bandpass interference filters.

Long pass filter Applications

● Beauty equipment
● Face recognition
● optical instrument
● Multi band detection instrument

Shape Optics Long Pass Filter Products

● Material:BK7
● Transmission:>90%
● Blocking:>OD4
● Incidence Angle:0°or 45°
● Surface Quality:40/20
● Clear Aperture:>90%
● Wavelength shift with temperature:<0.25nm/℃
● Damage threshold:300MW/cm²CW, 1J/cm²pulsed
● Other wavelengths ,materials and dimensions are available upon request
● Long- Pass Filters

DescriptionCut-on (nm)Thickness (mm)Item#
25mm dia.50x50mm
Longpass Filter / UV 250nm2501XUL0250ZUL0250
Longpass Filter / UV 275nm2751XUL0275ZUL0275
Longpass Filter / UV 300nm3001XUL0300ZUL0300
Longpass Filter / UV 325nm3251XUL0325ZUL0325
Longpass Filter / UV 350nm3501XUL0350ZUL0350
Longpass Filter / UV 385nm3851XUL0385ZUL0385
Longpass Filter / UV 400nm4001XUL0400ZUL0400
Longpass Filter / UV 422nm4221XUL0422ZUL0422
Longpass Filter / VIS 430nm4301XVL0430ZVL0430
Longpass Filter / VIS 450nm4501XVL0450ZVL0450
Longpass Filter / VIS 470nm4701XVL0470ZVL0470
Longpass Filter / VIS 490nm4901XVL0490ZVL0490
Longpass Filter / VIS 510nm5101XVL0510ZVL0510
Longpass Filter / VIS 530nm5301.5XVL0530ZVL0530
Longpass Filter / VIS 550nm5501.5XVL0550ZVL0550
Longpass Filter / VIS 570nm5701.5XVL0570ZVL0570
Longpass Filter / VIS 590nm5901.5XVL0590ZVL0590
Longpass Filter / VIS 610nm6101.5XVL0610ZVL0610
Longpass Filter / VIS 630nm6301.5XVL0630ZVL0630
Longpass Filter / VIS 650nm6502XVL0650ZVL0650
Longpass Filter / VIS 670nm6702XVL0670ZVL0670
Longpass Filter / VIS 690nm6902XVL0690ZVL0690
Longpass Filter / VIS 710nm7102XVL0710ZVL0710
Longpass Filter / VIS 730nm7302XVL0730ZVL0730
Longpass Filter / IR 750nm7502XIL0750ZIL0750
Longpass Filter / IR 780nm7802XIL0780ZIL0780
Longpass Filter / IR 810nm8102XIL0810ZIL0810
Longpass Filter / IR 840nm8402XIL0840ZIL0840
Longpass Filter / IR 870nm8702XIL0870ZIL0870
Longpass Filter / IR 900nm9002XIL0900ZIL0900
Longpass Filter / IR 930nm9302XIL0930ZIL0930
Longpass Filter / IR 960nm9602XIL0960ZIL0960
Longpass Filter / IR 990nm9902XIL0990ZIL0990

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