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Solar-Induced Fluorescence Imaging Sensor

Headwall’s Solar-Induced Fluorescence (SIF) imaging sensor excels at collecting data present in the Oxygen-Α and Oxygen-B bands where weak but valuable fluorescence signals are found. With this data, environmental scientists may gain a better understanding of plant physiology and stress.

OSA The Optical Society 100 Since 1916 Paul F. Forman Team Engineering Excellence Award

671–780 nm at 0.3 nm FWHM

FEATURES

  • Designed for Chlorophyll Fluorescence Imaging
  • All-reflective concentric imager design
  • Spectral resolution: ≤0.3 nm
  • Spatial pixels: 1,600
  • Scientific-grade data for O2A and O2B
  • Spectral passband: 671-780 nm
  • Weight (including lens): 6 kg / 13.23 lbs
  • Size: 300 x 200 x 180 mm

Understand plant physiology

What is Solar-Induced Fluorescence?

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.

The Value of Solar-Induced Fluorescence

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.

Figure 1: Example of absolute spectral response (ASR) functions on a particular band. The actual observations (red stars) are interpolated with a Gaussian function (blue line) to calculate the full width at half maximum (FWHM) (green lines) for the band center (red line). Provided by NASA Goddard Laser for Absolute Measurement of Radiance (GLAMR). (Paynter, Ian, Bruce Cook, Lawrence Corp, Jyoteshwar Nagol, and Joel McCorkel. 2020. “Characterization of FIREFLY, an Imaging Spectrometer Designed for Remote Sensing of Solar Induced Fluorescence” Sensors 20, no. 17: 4682. https://doi.org/10.3390/s20174682)

Specifications

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 @
equilibrium assumed

Operational Humidity

10 – 80% RH

Weight

6 kg / 13.23 lbs**

Size (spectrometer only)

320 x 200 x 180 mm /
12.6 x 7.87 x 7.08 in**

*Higher frame rates attainable with certain configurations

**Pre-production estimates, values may change.

To request a quote or a demo please select the product features you are interested in.

For more information download the product data sheets: