All SPECTRAL EVOLUTION full range spectroradiometers feature:
90 Sutton Street ◊ Unit 4
North Andover, MA 01845 USA
Tel: 978 687-1833 ◊ Fax: 978 945-0372
Email: info@spectralevolution.com
Copyright © 2011 Spectral Evolution, Inc
SPECTRAL EVOLUTION Spectroradiometers can be used to measure absolute power
levels of LEDs and other spectral devices. In this figure, spectral irradiance of the
SPECTRAL EVOLUTION ILM-105 light source at both high (red trace) and low (green
trace) intensity settings was measured at its fiber output using a SPECTRAL EVOLUTION
SR-3500 Spectroradiometer.
Spectroradiometers
All units feature state-of-the-art linear
silicon or multiple Si & InGaAs
photodiode arrays, integral dark
shutters and automatic exposure
control for fast, one-touch operation. All
units feature NIST-traceable calibration
for irradiance or spectral radiance
measurements.
SPECTRAL EVOLUTION
SR-series spectroradiometers
are supplied with one fixed
FOV lens (4, 8 or 14 degree
field of view). Additional lenses,
fiber optic cables, right angle
diffusers and integrating
spheres may also be ordered
as accessories. Contact us for
additional info.
SPECTRAL EVOLUTION Laboratory SR-series full range photodiode
array spectroradiometers display superior signal-to-noise ratio and
spectral resolution. All units feature NIST-traceable calibration for
irradiance or spectral radiance measurements. For best sensitivity
in the NIR ranges, only SPECTRAL EVOLUTION spectroradiometers can
be used with direct attachment FOV lenses that couple directly to the
optical path. This is due to their superior diffraction-based optical
platform with multiple photodiode arrays (two InGaAs arrays for NIR in
the SR-3500). Multiple detectors are all measuring the same target
sample due to their beam splitter optical path. This ensures better data
integrity in transition areas as the spectrum shifts between detectors.
Unlike competitive systems, SR-series spectroradiometers have no
internal fiber optics or movable gratings that can break, drift or fail
during mission critical experiments. All SPECTRAL EVOLUTION
Spectrometers come with a full 12 month warranty against defects and
breakage in use.
All SPECTRAL EVOLUTION spectroradiometers calibrated for solar radiance have
capabilities for generating 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.
Q: What's the difference between a spectroradiometer and a spectrometer? Which instrument should I buy?
A: SPECTRAL EVOLUTION Spectroradiometers are factory calibrated with NIST-traceable reference standards to
measure spectral radiance and irradiance . They can also be used as spectrometers to measure reflectance,
transflectance, absorbance and transmission. If you don't need to measure absolute energy levels of your target,
then we suggest purchasing a spectrometer. Click here to access our lab spectrormeter page
Full Range Photodiode Array
UV-VIS-NIR-SWIR InGaAs / Si
Spectroradiometers
Silicon Photodiode Array UV-VIS-NIR Spectroradiometers
SPECTRAL EVOLUTION Si Photodiode array spectroradiometers are ideal for researchers on
limited budgets or for applications that don't require the broad spectral range of our full-range
spectroradiometers. Compact in size, these full featured units include:
- High reliability all photodiode array optics with no moving gratings to break in the field
- Autoexposure, autoranging and autoshutter functions for easy one-touch operation
- Lightweight– less than 4 pounds- sturdy aluminum chassis
- Includes 1/2 meter nondetachable fiber optic cable with right angle diffuser
- Exclusive DARWin SP Data Acquisition software provided with each unit
Technical Specifications-
SR-1100 and SR-500 Spectroradiometers
Validate the class of any commercially available solar simulator using the SR-1100 Spectroradiometer as
per IEC60904-9/ASTM E927-05. The graph was generated using the easy-to-use DARWin SP Data
Acquisition and Analysis software included with each LR- and SR-Series Spectroradiometer. The red trace
demonstrates the simulated solar graph of AM1.5 Global Tilt as per ASTM specification (E892). The black
trace shows the actual measurement of irradiance as detected using the SR-1100 over its full
spectroradiographic range (320-1100nm). Built-in software routines automatically provide class status as a
function of wavelength (inset).

LED- Measurement: Rapid one-touch measurements of light emitting diodes can be obtained
using the SR-500 Spectroradiometer and the companion DARWin SP Data & Acquisition
Module included with each unit. Here, the SR-500 was used to measure irradiance levels of
commercially available red LEDs (red trace) and yellow LEDs (yellow trace) in two separate
experiments. Easy pull-down menus in the software allow users to superimpose graphs for
convenience