Integrating Sphere System
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LMS is designed to characterize opto-electrical property of light sources at various driving condition and operation temperature with fully automated control program. It consists of integrating sphere, Spectrometer, power supply, temperature control unit, satellite lamp, and Standard lamp.
▣ Types of Integrating Sphere
LMS-120 LMS-200 LMS-400 LMS-800
▣ Ambient Temperature Controller
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TC 850 control ambient temperature inside sphere with Air Circulation Heating Coil type and can drive the temperature from -20oC ~ 85oC at 0.2oC accuracy. It consists of Temperature control unit and monitoring unit |
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Auto sequence measurement can be set for aging, idle and on/off time along with input voltagte and current setting for temperature dependance of IVL curve. |
▣ Main Program
▣ Spectrometer Selection Chart
주1. Measured with collimating lens mounted with 600um fiber input
주2. Unit: W/m^2nm
▣ Opto-elecrtical property vs. operation Temp.
LED itself and lighting shows a huge variation as ambient temperature changes therefore it is necessary to define its performance in the period of development. In general, high power LED shows spectrum shift from 0.1 to 0.3nm/K and luminous flux drop around B(-0.05%/oC) => W(-0.3%/oC) => G(-0.35%/oC) => R(-0.83%/oC) => A(-1.05%/oC).
Luminous Flux per Ambient Temperature Spectral Distribution Change Luminous Flux per CW and PWM Color Coordinate Change Peak Wavelengh Change Luminous Efficacy Change Forward Voltage Change Forward Voltage, Board Temp. at 65℃ Luminous Flux per frequency at 60% duty
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