Software capabilities for specific applications with SPECTRAL EVOLUTION Spectrometers
Every SPECTRAL EVOLUTION Spectrometer and Spectroradiometer is supplied with the exclusive DARWin SP Data Acquisition Module- a full-featured, menu driven program for easy data manipulation and analysis of multiple UV-VIS-NIR spectra. The DARWin SP module features one-touch operation and easy, intuitive menus for fast, effortless operation.
Vegetative index applications & calculation subroutines
Leaf Reflectance: Rhododendron decorum (green trace) and Acer saccharum (red trace) leaf reflectance were measured using a SPECTRAL EVOLUTION PSR-3500 Spectrometer with the companion SPECTRAL EVOLUTION ILM-105 Fiber Optic Illumination Module fitted with an optional 1 meter bifurcated fiber optic cable. The graphs were generated using the easy-to-use DARWin SP Data Acquisition and Analysis software included with each PSR-Series Spectroradiometer. DARWIN SP allows users to plot multiple scans on the same graph for easy comparison and analysis. All units feature automatic exposure control and auto-shutter for simple operation.
Certain SPECTRAL EVOLUTION models designed for soil & vegetative index measurements come with specialty pulldown menus to automatically calculate 17 broadband and narrowband vegetative indicies (see pull-down menu below). Each index can be user modified with simple on-screen menu-driven instructions. Calculated indicies include:
NDVI (Normalized Difference Vegetation Index) GRVI (Green Ratio Vegetation Index) SR (Simple Ratio Vegetation Index) DVI (Difference Vegetation Index) SAVI (Soil Adjusted Vegetation Index) Red/Green (Red Green Ratio) ARVI (Atmospherically Resistant Vegetation Index) Green NDVI (Green Normalized Difference Vegetation Index) EVI (Enhanced Vegetation Index) MSAVI2 (Modified Soil Adjusted Vegetation Index Type II) IPVI (Infrared Percentage Vegetation Index) Sum Green (Summed Green Vegetation Index) PRI (Photochemical Reflectance Index) NDVI705 (Red Edge Normalized Vegetation Index) WBI (Water Band Index) NDWI (Normalized Difference Water Index) PAR (Photosynthetically Active Radiation) NDNI (Normalized Difference Nitrogen Index)
SPECTRAL EVOLUTION Spectrometer models designed for mineral reflectance measurements also come with specialty pulldown menus to allow users to access scans from the USGS Spectral Library for comparison to known samples (see panel below). Contact us for additional information on this unique feature!
DARWin SP Data Acquisition Module outputs data files into ASCII format which is compatible with many 3rd party software programs including THE SPECTRAL GEOLOGIST (TSG). Contact SPECTRAL EVOLUTION for more information on generating spectrometer data for interpretation with 3rd party solutions.
Solar simulation and CIE 1931 colorimetry
Certain SPECTRAL EVOLUTION models designed for measuring solar radiance have capabilities for calculating a spectral match report for measuring class performance as per IEC60904-9/ASTM E927-05. This is especially useful for measuring the performance of continuous solar simulators. All SPECTRAL EVOLUTION spectrometers can be used to measure CIE 1931 Colorimetry parameters.
All SPECTRAL EVOLUTION Spectroradiometers also come with a pull-down utility that allows users to calculate integrated energy levels as a function of wavelength interval (user adjustable). An example of this useful tool is shown below:
DARWin SP Data Acquisition software offers first and second derivatives calculations. Derivatives are typically used as signal pre-treatments applied to spectra data. They are used primarily to resolve peak overlap, enhance resolution of spectral features and eliminate noise and spectral drift between samples. Shown below is an example of the first derivative for a vegetation scan.
Field data acquisition with DARWin LT and the ALGIZ 8X rugged handheld tablet
For convenient collection of data in the field, SPECTRAL EVOLUTION spectrometers and spectroradiometers can be controlled by DARWin LT software running on Windows 10 on an ALGIZ 8X rugged handheld tablet.
The ALGIZ 8X features:
- Small size 225mm x 147mm x24mm (8.8” x 5.7” x 0.9”)
- 8” capacitive touchscreen – 1280×800 resolution – sunlight readable display
- GPS antenna
- Runs Windows 10
- Hot swappable lithium-ion battery pack
- 8 megapixel rear facing camera with autofocus and LED flash
- 2 megapixel front facing camera
- IP65 rated
- Bluetooth connection to instrument, USB connection to PC
DARWin LT is specifically configured to run on the tablet. Functionality includes capturing GPS location and a digital camera for taking sample pictures. All metadata is tagged to the scan and stored as an ASCII file.