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Photonics Marketplace / Gigahertz-Optik Inc., Sub. of Gigahertz-Optik GmbH
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Gigahertz-Optik Inc.
Sub. of Gigahertz-Optik GmbH
MapBoston North Technology Park
Bldg. B, Ste. 205, 110 Haverhill Rd.
Amesbury, MA 01913
United States
Phone: +1 978-462-1818
Fax: +1 978-462-3677

Single-Pulse LED Measurement System

Photonics Spectra
Jul 2012
Slight differences in LED characteristics can occur during mass production. Sorting the LEDs into bin classes based on luminous flux and color properties provides a means of cataloging them. The LED manufacturer may do the binning, or the party implementing the LEDs may. For higher-efficiency processing, the LED is normally operated and measured in single-pulse mode at a few-milliseconds-long pulse width at a specified operating current.

Gigahertz-Optik Inc. has developed a measurement system consisting of the BTS256-LED tester and LPS-20-1500 LED power supply with S-BTS256 software to assist with single-pulse LED binning.

The meter, power supply and control software work in tandem to drive and measure the test LED in single-pulse mode and to record the results.

The compact BTS256-LED tester is designed to measure luminous flux, and spectral and color data of single assembled and unassembled LEDs in the visible spectrum. Its bi-technology light sensor offers a fine photometric response photodiode for accurate, wide-dynamic-range flux detection. Along with the integral detector, a compact low-stray-light spectrometer is installed for spectral color measurements. The Bi-Tec sensor photodiode is used for pulse form profiling measurements and operates in fast data logger mode with a 1-ms sampling rate. The BTS256-LED is powered through its USB adapter when connected to a PC.

The LPS-20-1500 microprocessor-based current and voltage source operates LEDs and other semiconductor light sources that require low noise. It operates at up to 1500 mA with 30-μA resolution and at up to 24 V with 0.5-mV resolution. It is set up for full remote control operation in continuous-wave or single-pulse mode. Current and voltage can be measured with high 16-bit ADC resolution. Its input-output interface supports trigger-in and trigger-out operation in flash mode.

The S-BTS256-LED software supports setup of the measurement device and source and the synchronized measurement. Calibration and certification of the BTS256-LED tester is performed in the company’s ISO 17025-accredited optical radiation calibration laboratory.

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