Effect of Red Light-Emitting Diodes Irradiation on Hemoglobin for Potential Hypertension Treatment Based on Confocal Micro-Raman Spectroscopy

Table 1

The detailed specification and parameters of red LED.

(a) Electrical-Optical Characteristics at = 400 mA, Ta = 25°C

Parameter	Symbol	Min	Type	Max	Unit
Luminous		30	~	40	lm
Wavelength		640	~	660	nm
Forward voltage		2.0	~	2.6	V
Power dissipation		0.80	~	1.04	W
View angle	2θ1/2	~	60	~	deg.
Thermal resistance		~	12	~	°C/W

(b) Absolute Maximum Ratings

Parameter	Symbol	Value	Unit
Forward Current		400	mA
Junction Temperature		115	°C
Operating Temperature		−40~+60	°C
Storage Temperature		0~+60	°C
ESD sensitivity	~	±2,000 V HBM	~
Temperature Coefficient of voltage	~	−5	Mv/°C
DC Pulse Current (@ 1 KHz, 10% duty cycle)		1000	mA
Reverse Voltage		Not designed for reverse operation

Notes
1. Tolerance of Luminous Flux is ±3%.
2. Tolerance of Forward Voltage is ±0.1 V.