.660 Nm, Laser Oral Therapeutic Apparatus

The laser has been applied widely in the buccal medicine lately. At present, the laser used widely in buccal clinic includes co₂ laser, helium neon laser, Nd:YAG laser,Er laser and semiconductor laser,et al.The uses of laser offfers huge convenience for the treatment of buccal clinic, and has a lot of advantage than other Rx ,such as no keenly feel when get rid of the parenchyma .soonly concrescence of the wound ,the cure course of removing caries without pain.the use of the semiconductor laser is the mostly widely above all,and also it's biology domino offect. Because it's high absorptivity is albumen,it's effect is very good concluding incise ,antisepsis,physical therapy agile.According to the latest research literrature and the fettle of internal,the laser of 660nm has a high absorptivity on albumen that can make the laser of that wavelength exert its function maximum if it is in liquid circumstance,so we choice this laser cure machine of 660nm.In the fist chapter, actuality of the laser in the buccal medicine and the base development status of laser technique overseas are briefed at first, then the purport and significance of this paper are expatiated, and a summary to the whole paper is made.In the second chapter,we mainly describe the power supply ,including voltage swith circuit,discharge circuit,protect circuit,softly startup circuit,control circuit and refrigeretion circuit.Voltage swith circuit: This integrate circuit concludes series 7800 and 7900.Discharge circuit: Adoupt two levels inorder to buildup stability and anti-jamming of the circuit.Protect circuit: The function of this circuit is cut the output circuit and warn the over loading current when the power supply export largely electric current.Softly startup circuit: Then action of this circuit is assure to prolong the time when the power supply is at work and output the current which was given to the semiconductor laser,and that can reduce the concussion of the current when you open the machine.And the softly startup circuit can make the exportable current move up slowlly.