SPECTRAL EVOLUTION designs, manufactures, and services high resolution/high sensitivity, full range UV-VIS-NIR spectrometers and spectroradiometers. These instruments are used worldwide for many lab and field assignments due to their reliable, robust, rugged yet lightweight design and user-friendly features including. They feature 100% photodiode array construction for low noise and reliable battery operated performance, fast, full spectrum measurements with no moving gratings and integral dark shutter and autoexposure for one-touch scanning.

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SR-6500 Ultra High Resolution Full Range Spectroradiometer

Resolution at FWHM
1.5nm @ 700nm
3.0nm @ 1500nm
3.8nm @ 2100nm

Field Portable Spectroradiometers for Remote Sensing

Fast, full-spectrum UV-VIS-NIR measurements - 350-2500nm with just one scan; PSR-1100f – 320-1100nm
Superior reliability in the field with 100%diode array optics with no moving parts
Calibration to NIST-traceable standards for radiance and irradiance measurements
Typical applications: Ground truthing, soil analysis, environmental measurements, remote sensing research, forest canopy studies, vegetation research
Models include:

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Field Portable Spectrometers for Mining

Full range 350-2500nm
High resolution/high sensitivity in a rugged field instrument
Reliable operation with no moving optics and robust fiber optic cable with quick disconnect
Typical applications: mineral identification, alteration mapping, core scanning, mineral analysis, mineral mapping
Models include:
- SR-6500
- oreXpress

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Compact Spectroradiometers for lab or field use

High sensitivity with a high signal-to-noise ratio and an unmatched wide dynamic range
Fast and easy operation
Autoexposure, autoscaling, and auto dark shutter for fast, accurate, one-touch scans
Typical applications: remote sensing, radiometric calibration transfer, solar simulator test and measurement, radiance/irradiance measurement, simultaneous upwelling/downwelling measurement
Models include:

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Compact Spectrometers

All photodiode array construction directly mated to fiber optic for the ultimate in throughput and reliability - no moving optical parts
Optimized gratings for maximal sensitivity (signal-to-noise ratio)
Built-in autoshutter and autoexposure for one-touch scanning
Typical applications: general spectroscopy, soil analysis, water/moisture analysis, petrochemical analysis, polymer identification, total petroleum hydrocarbons in soil, LED light testing and binning
Models include:

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SPECTRAL EVOLUTION PSR Series Spectroradiometers use firmly attached diffraction grating-based internal optics with multiple photodiode array detectors. This ensures both high sensitivity and resolution without having to use light-robbing internal fiber optics, ultra-narrow slits or moving gratings & prisms that can get knocked out of alignment. PSR Series Spectroradiometers can collect spectra in as little as 100 milliseconds. The exclusive DARWin SP Data Acquisition Module included with each unit allows for full featured instrument control. All data files are stored as ASCII text and are compatible with many 3rd party software programs for further data manipulation. LABVIEW drivers are also available (please inquire).

In the screen shot, soil reflectance measurements were taken using the PSR-3500 field portable spectroradiometer using its standard 4 degree field of view lens from a distance of 1 meter at an exposure time of 1 second (blue trace). Solar radiance of the reflected light (green trace) was also captured in the same measurement. Soil scan was taken on site at the Railroad Valley Playa in Nevada on June 22, 2011. Latitude 38.50971, longitude -115.70020, GPS time 8:21:05PM.

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