Presentation Information
[23p-P05-58]Pulsed LED light source stabilized by duty ratio control for optical evaluations
Ami Hitomi1, Ayaka Kojima2, Yohei Murakami2, Daiki Takada2, Yuga Kinoshita2, 〇Tooru Katsumata2, Hiroaki Aizawa2, Takeshi Matsumoto3 (1.toyo, 2.toyo univ., 3.Matsumoto Precision)
Keywords:
LED light source,Duty ratio,Pulsed LED light source
In optical absorption, fluorescence, and light scattering measurements using an LED light source, the temperature of the LED increases during the evaluations. Optical intensity from LED decrease and wavelength LED become longer. In this paper, highly stable LED light source was developed by optimizing the duty ratio and pulse frequency of the PWM (Pulse Width Modulation) method for precise and stable optical measurement.