Retro-reflectors have been used for a wide range of applications such as traffic safety, special blinds, optical devices, etc. We analyzed the characteristics of the reflected light of a strap retro-reflector as a function of incidence angle. It is expected that various solar control structures may be designed more quantitatively using the characteristic chart we have prepared.
We present a method for manufacturing a TIM used for packaging a high-power LED. In this method a mixture of diamond powder and hydrogen peroxide is used as a filler epoxy. The thermal resistance of the TIM with hydrogen peroxide was improved by about 30% over the thermal resistance of the TIM without hydrogen peroxide. We demonstrate that as a result the heat generated from the chip is easily dissipated through the TIM.
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