激光探测音频信息实验  

Experiment of detecting audio information by laser

作　　者：戴玮[1] 陶宗明[2] 段天权[1] 张连庆[1] 

机构地区：[1]炮兵学院基础部基础实验中心,安徽合肥230031 [2]炮兵学院基础部物理教研室,安徽合肥230031

出　　处：《实验技术与管理》2010年第8期40-42,共3页Experimental Technology and Management

摘　　要：在大学物理实验课中开设激光探测音频信息的设计实验,有利于激发学生的创新意识和动手能力。讨论了这一设计实验的基本原理、实验仪器等,研究了探测效果与入射光角度、硅光电池被照面积与感光面比值和音频信息频率的关系。实验结果表明：入射角在10～70°之间、照射面积与硅光电池感光面之比在1/4～1/2之间时,探测效果很好,音频信号频率越低探测效果越好。Setting up the design experiment of detecting audio information by laser in college experimental phys-ics is useful to activate students’creation consciousness and practicing ability.The fundamental principle and devices of this design experiment are discussed,and the relationship between the effect of detection and inci-dent angles,the ratios of irradiated area to cathode area of silicon photocell,the frequencies of audio informa-tion is studied.The experimental results indicate that when incident angles are within 10°～70°,the ratios of irradiated area to cathode area of silicon photocell are within 1/4～1/2,the effect of detection is good,and the smaller of frequencies of audio information,the better of effect of detection.

关 键 词：激光探测 音频信息 硅光电池 失真 

分 类 号：O4-33[理学—物理]