Product Descriptions:
| Characteristics: | IR650+ 940nm Optical Filter |
| Central Wavelength (CWL): | 940nm |
| Transmittance: | ≥90% @420-620nm ≥90% @940±5nm |
| Full Width at Half Maximum(FWHM): | Specified |
| Dimension: | Customized,Common for 86x86mm, 80x80mm,other can customized,max. 300x300mm |
| Thickness: | Customized – 0.21、0.3、0.55、0.7、1.0、1.1、2.0、3.0mm…etc |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark：*Customized capability: 380-2500nm, stock for 10nm intervals. | |
Measured Spectral measurement
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Picture 1: IR650+ 940nm Optical Filter Spectral measurement |
What is key parameter when choose for Infrared (IR) cut-off filter?
When selecting a Infrared (IR) cut-off filter, the cut-off wavelength is designed at 50% transmittance. It’s one of key parameter to be designated, with a tolerance of generally +/-5nm or +/7nm which depend on the user inquiry. Secondly,Peak and Average Transmittance, e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
What is key parameter when choose for right bandpass filters?
When selecting a bandpass filters, the center wavelength (CWL) will be one of key parameter to be designated, with a tolerance of generally +/-5nm or +/7nm which depend on the user inquiry. Secondly, Full Width at Half Maximum(FWHM) means the transmittance range, for those FWHM is short, normally called narrow bandpass filters (NBP) which no united definition and typically for lower than 10nm. then, Peak and Average Transmittance, e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
More Bandpass filters in stock from Shenzhen Hengda Liyuan Optoelectronics: BP430 BP480 BP500 BP550 BP560 BP600 BP650 BP800…etc.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nanomaterials through ion-assisted evaporation onto a multilayer hard film in a high vacuum environment which coating layer is firm and has good tightness, and small bandwidth drift. Liyuan optoelectronics have been focus on optical coating for more than 17 years and offer one-stop optical filters solution including Narrow Bandpass Fitlers, IR cut-off Filters, Longpass & Short Filters,Notch Filters, ND filters, Star filters and Optical sapphire block.
