Menu News Products Video Webinars White Papers EDU
< More White Papers
Characterization of Light Emitting Diodes (LEDs) and Compact Fluorescent Lamps (CFLs) by UV-Visible Spectrophotometry
Author: C. Mark Talbott, Ph.D., Robert H. Clifford, Ph.D.
Wednesday, October 10, 2012

The acceptance and commercial utilization of Compact Fluorescent Lamps (CFLs) and, more recently, Light Emitting Diodes (LEDs) have grown significantly in the past five years, leading to increased research. This paper demonstrates the use of a typical laboratory UV-Vis spectrophotometer to measure and characterize CFL and LED lamps, focusing on spectral characteristics such as peak wavelength, Full Width at Half Maximum, centroid wavelength, dominant wavelength, color, and color purity.

File: LEDsWhitepaper.pdf (1.01 MB)
Login Register

Measuring Optical Densities Over 10 Abs on the Agilent Cary 7000 Universal Measurement Spectrophotometer (UMS)
High blocking optical filters deliver critical optical control in a wide variety of consumer and industrial products. Highly attenuating (i.e., high optical density) filters are used in personal protective equipment, such as laser safety eyewear, through to precise, low light level control in optical systems for enhanced sensitivity at preferred wavelengths. This technical overview demonstrates the performance of the Cary 7000 UMS for the measurement of such materials.
- Agilent Technologies, Inc., Chemical Analysis
A Characterization of UV Effects on Optical Silicones used in Opto-electronic Devices and New Developments in Resistant Materials
Optoelectronic devices require optically transparent encapsulants and adhesives. Maintaining the highest transmission possible of the material is paramount for device design. Traditional epoxies are susceptible to breakdown due to high light flux and the resulting heat, but silicones perform better. This paper provides data on 22 samples of silicon, acryalte and epoxy and compares their ability to withstand UV radiation.
- NuSil Technology LLC
How to measure optical filter spectra accurately
Optical filters play an important role in enabling applications such as fluorescence microscopy and Raman spectroscopy. In these applications there are two distinct types of beams: the illumination (or excitation) beam and the signal (or emission) beam. Not only are these beams spectrally distinct, but also they differ significantly in their intensity – the signal beam can be a million times (or more) weaker than the illumination beam. Therefore, the ability of filters to selectively transmit...
- Semrock, Inc.

Facebook Twitter RSS Mobile Apps