A fraction of the light absorbed by chlorophyll molecules in plants is re-emitted at longer wavelengths. This signal can serve as a proxy for plant photosynthetic activity. While SIF is often measured by single point instruments, the Headwall SIF imaging sensor features sub-nm spectral resolution, high spatial resolution, and the optimal wavelength range to detect and image the SIF signal. Note that Headwall does not supply algorithms to separate the SIF signal but captures data for researchers to utilize with their own methodology.
Remote sensing of solar-induced fluorescence (SIF) is rapidly advancing as a technique in agricultural and environmental science, although it is founded upon decades of research, applications, and sensor developments in active and passive sensing of chlorophyll fluorescence. The extremely weak yet distinct SIF signal can be assessed remotely using this very high-resolution spectral sensor in tandem with your own algorithms to distinguish the emission from reflected and/or scattered ambient light.
Wavelength Range | 671 – 780 nm |
Spectral Resolution | ≤ 0.3 nm |
Working f-number | f/2.5 |
Angular FOV (swath width) | 23° (nominal) |
Spectral Pixels | 2,134 px |
Number of un-binned spatial pixels | 1,600 px |
FPA Technology | TE-cooled sCMOS |
Maximum Frame Rate, no binning, using High-Capacity HDPU* to disk | ≤ 52 Hz |
Camera Bit Depth | 16 bits |
Maximum Power Consumption | 10 W typical, 32 W peak power |
Input Voltage | 12 – 24 V DC |
Shutter | electricro-mechanical |
Lens | Headwall 25mm VNIR Telecentric |
Camera Interface | CameraLink HS Fiber |
Operational Temperature Range | +10 to +40 ºC |
Athermalization | Passive by design; soak @ |
Operational Humidity | 10 – 80% RH |
Weight | 6 kg / 13.23 lbs** |
Size (spectrometer only) | 320 x 200 x 180 mm / |
*Higher frame rates attainable with certain configurations
**Pre-production estimates, values may change.
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