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.
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
| Description | Cut-on (nm) | Thickness (mm) | Item# | |
|---|---|---|---|---|
| 25mm dia. | 50x50mm | |||
| Longpass Filter / UV 250nm | 250 | 1 | XUL0250 | ZUL0250 |
| Longpass Filter / UV 275nm | 275 | 1 | XUL0275 | ZUL0275 |
| Longpass Filter / UV 300nm | 300 | 1 | XUL0300 | ZUL0300 |
| Longpass Filter / UV 325nm | 325 | 1 | XUL0325 | ZUL0325 |
| Longpass Filter / UV 350nm | 350 | 1 | XUL0350 | ZUL0350 |
| Longpass Filter / UV 385nm | 385 | 1 | XUL0385 | ZUL0385 |
| Longpass Filter / UV 400nm | 400 | 1 | XUL0400 | ZUL0400 |
| Longpass Filter / UV 422nm | 422 | 1 | XUL0422 | ZUL0422 |
| Longpass Filter / VIS 430nm | 430 | 1 | XVL0430 | ZVL0430 |
| Longpass Filter / VIS 450nm | 450 | 1 | XVL0450 | ZVL0450 |
| Longpass Filter / VIS 470nm | 470 | 1 | XVL0470 | ZVL0470 |
| Longpass Filter / VIS 490nm | 490 | 1 | XVL0490 | ZVL0490 |
| Longpass Filter / VIS 510nm | 510 | 1 | XVL0510 | ZVL0510 |
| Longpass Filter / VIS 530nm | 530 | 1.5 | XVL0530 | ZVL0530 |
| Longpass Filter / VIS 550nm | 550 | 1.5 | XVL0550 | ZVL0550 |
| Longpass Filter / VIS 570nm | 570 | 1.5 | XVL0570 | ZVL0570 |
| Longpass Filter / VIS 590nm | 590 | 1.5 | XVL0590 | ZVL0590 |
| Longpass Filter / VIS 610nm | 610 | 1.5 | XVL0610 | ZVL0610 |
| Longpass Filter / VIS 630nm | 630 | 1.5 | XVL0630 | ZVL0630 |
| Longpass Filter / VIS 650nm | 650 | 2 | XVL0650 | ZVL0650 |
| Longpass Filter / VIS 670nm | 670 | 2 | XVL0670 | ZVL0670 |
| Longpass Filter / VIS 690nm | 690 | 2 | XVL0690 | ZVL0690 |
| Longpass Filter / VIS 710nm | 710 | 2 | XVL0710 | ZVL0710 |
| Longpass Filter / VIS 730nm | 730 | 2 | XVL0730 | ZVL0730 |
| Longpass Filter / IR 750nm | 750 | 2 | XIL0750 | ZIL0750 |
| Longpass Filter / IR 780nm | 780 | 2 | XIL0780 | ZIL0780 |
| Longpass Filter / IR 810nm | 810 | 2 | XIL0810 | ZIL0810 |
| Longpass Filter / IR 840nm | 840 | 2 | XIL0840 | ZIL0840 |
| Longpass Filter / IR 870nm | 870 | 2 | XIL0870 | ZIL0870 |
| Longpass Filter / IR 900nm | 900 | 2 | XIL0900 | ZIL0900 |
| Longpass Filter / IR 930nm | 930 | 2 | XIL0930 | ZIL0930 |
| Longpass Filter / IR 960nm | 960 | 2 | XIL0960 | ZIL0960 |
| Longpass Filter / IR 990nm | 990 | 2 | XIL0990 | ZIL0990 |
