SpectroRadiometer PDF Download

More and more incandescent lights are being replaced by LEDs each day. LEDs have the advantages of increased efficiency, color specificity, size, response time, lifetime, and numerous other factors.  StellarNet's line of low cost miniature radiometers are the perfect tool to analyze LEDs for both irradiant output, color, spectral profiling, and a handful of other useful values. These instruments are NIST calibrated to measure the absolute intensity over the wavelength range in nanometers provided by the selected spectrometer model.  Currently, StellarNet offers LED Radiometer systems in the 200-1700nm range; the table at the bottom of the page outlines various ranges for each StellarNet Spectroradiometer.  The StellarNet BLUE and GREEN-Wave, BLACK-Comet concave grating model, and the RED-Wave-NIR InGaAs model can all be configured for perfect LED measurement.  For a complete LED measurement system, in addition to a StellarNet Spectrometer, a fiber optic cable and an integration sphere are needed for both accurate and precise measurement.

New StellarNet Low Cost Integrating Spheres

Why StellarNet SpectroRadiometers?

- UV-VIS-NIR Ranges 200-1700nm

- Low cost - Ruggedized - high performance

- Shock-proof - Permanently aligned

- SpectraWiz Software included Free

- Battery packs for field measurements

- USB-2 interface to all notebook PCs

• Fast delivery: most system can be calibrated and shipped within 1 week after receipt of order
   

• Absolute calibration: accuracy within 10% at detector integration setting used for calibration
   

• Certificate available: documentation with NIST traceable serial numbers.

See more StellarNet Measurement Diagrams!!

StellarNet also has extended range spectroradiometers available to measure spectral irradiance over a wide range of wavelengths.  The EPP2000-UVN-SR spectroradiometer with CCD detector array covers a range of 200-1100nm.  While the BLACK-Comet-SR super range dual blazed concave grating spectroradiometer offers a range of 230-1100nm while retaining all of the characteristics of a concave grating spectrometer. In addition, StellarNet offers a Dual Channel Spectrometer system for spectroradiometry, the Dual DSR (Detector Super Range) combines a CCD and InGaAs detector to cover a wavelength range of 200-1700nm for selected models.

Power and InterFace
Portable spectrometers include a USB-2 interface cable and +5VDC power adapter for 120VAC-60H (light sont transformers with U.S. style 2 prong plugs). For usage outside the U.S.A., we offer an upgrade to universal power adapters. If you don't have a USB-2 port, connecting the spectrometer to a second EPP printer port on your computer is most convenient and recommended. For portable notebook computers that don't have a USB-2 port or an EPP capable printer port, we offer the PCMCIA card style EPP interface.


 

BLACK-Comet concave grating spectrometer for LED measurement capturing spectrum of Nichia White LED (190-850nm or 280-900nm).  SpectraWiz software displays 1931 CIE Chromaticity Diagram with xy chromaticity values within .001 of LED specifications.  Also displayed is LED dominant wavelength, purity value XYZ tri-stimulus values. SpectraWiz software allows the user to save samples, log data, auto-scale, and take dark references.

StellarNet Integrating Spheres allow collection of light with an 180 field of view.  The IC2 is a 2" internal diameter sphere with 2 SMA connectors for illumination and collection of LED light. The input port is 5/8".  The IS6 and IS12 are 6" and 12" StellarNet integrating spheres with 2.5" input port with internal white coating.  Mounting tripods and other accessories are available for LED measurement.

Integrating Sphere PDF

Integrating Sphere Pricelist

Calibration

The factory performs a calibration for the appropriate wavelength range from 300-850nm or 350-1100nm using an NIST traceable calibration source lamp.  This irradiance calibration service (IRRAD-CAL) is optional.  If the user has an appropriate irradiance calibration source lamp, a field re-calibration can be easily performed using the included SpectraWiz software.

BLACK-Comet-SR concave grating spectrometer for LED measurements displaying irradiance values in LUX as well as correlated color temperature (CCT). Choose model C-SR (200-1080nm) or CXR-SR (220-1100nm)

*Note only Concave grating spectrometers can be NIST calibrated for deep UV (IRRADUV-CAL) and VIS (IRRAD-CAL) measurements simultaneously.

SpectraWiz Software allows the users to select the irradiance units. Additionally, scroll down menus allow the user to select their collection accessory in order to calculate radiant and luminous flux. Above is the spectrum of a 345nm UV LED popular for many biology related fluorescence excitation applications. In order to make LED measurements measurements below 300nm a IRRADUV-CAL is required. 

BLACK-Comet spectral overlay of LEDs tested for our SL1-LED kit. In order to choose the best LEDs for fluorescence excitation it is required that the StellarNet R&D test all incoming LEDs for wavelength and absolute intensity as compared to the manufacturers specifications. 
 

BLUE-Wave-VIS model miniature spectrometer can be calibrated for irradiance measurements also.  The spectrometer has a range from 350-1150nm and can be calibrated for irradiance measurements (IRRAD-CAL).  BLUE-Wave spectrometers have the advantage of being smaller and powered by USB; however, lack the benefits of research grade concave grating optics.  Check with a sales representative to determine the best spectrometer for your LED analysis.