Product Descriptions:
| Characteristics: | 640nm Longpass filters |
| Central Wavelength (CWL): | 640nm or specified* |
| Transmittance: | >90% or specified |
| Dimension: | 32*11mm** |
| Thickness: | 1.0mm*** |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Spectral range: | 200-1100nm |
| Remark： *Customized capability: 380-2500nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm,other can customized,max. 300x300mm *** Option: 0.21、0.3、0.55、0.7、1.0、1.1、2.0、3.0mm…etc | |
Spectral curve
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| Picture 1: LP640nm Spectral Curve |
What is typical application for 640nm Longpass filter?
Typical application for 640nm Longpass filter primarily used to isolate far-red or NIR emission in advanced bioimaging, to enable covert and high-contrast NIR machine vision, to enhance astronomical observation, to ensure safety and purity in laser systems, and to facilitate specialized infrared photography and sensing.
What is key parameter when choose for right Longpass filters?
When selecting a Longpass 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,Peak and Average Transmittance,e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
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.
Other typical Longpass filters in stock from Liyuan Optoelectronics include LP430 LP446 LP500 LP530 LP540 LP540 LP560 LP600 LP640 LP650 LP720 LP740 LP800 LP820 LP945。。。etc.
