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and a Bi525 filter can be used to block excitation sources and other interfering longer and shorter wavelength light while passing desired green emission wavelengths
Healthy vegetation will absorb (not reflect) blue light and strongly reflect NIR light
MidOpt Longpass Filters have a broad
The MidOpt BP660 Dark Red Bandpass Filter is recommended for use with 650-680nm LED and laser diode lighting
These filters are also excellent for use in vegetative health monitoring applications where separate blue plus near-IR imaging sensors / cameras are used as opposed to the more traditional NDVI index applications that utilize red plus near-IR wavelengths
Machine Vision Swatch Filter Kit - MidOpt FS100 ENDVI and a Bi525 filter canThe MidOpt FS100 Machine Vision Swatch Filter Kit is a portable filter kit that makes it easy and convenient to solve applications on site. It includes 10 of the most commonly recommended ultraviolet (UV), visible (VIS) and near infrared (IR) Machine Vision Filters. (Note: The main MidOpt filter line has a tighter surface quality spec than the FS100. Filters included in the FS100 have a surface quality of 60 40.)