学术
摘 要:
给出了CD光盘的等效径向光栅常量d_⊥和切向光栅常量d_∥的公式，并利用He-Ne激光器、坐标纸和分光计测量了d_⊥和d∥的值．用移测显微镜测量了光盘中信息区的最大等效半径R_max和最小等效半径R_min,给出了计算光盘存储容量V的公式，该公式表明，存储容量V是d_⊥，d_∥，R_max和R_min的函数．实验测得的d_⊥和d_∥和国家工业标准值的误差分别为0．1％和0．6％．实验测得的光盘存储容量值和计算机测定值之间的误差为0．3％，分析了产生测量误差的原因．[著者文摘]
文章出处:
《物理实验》-2008年28卷1期 -5-8页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1005-4642（2008）01-0005-04
Measuring equivalent grating constant and storage capacity of CD
HUANG Zhen-yong, LIN Xue-ehun, LAI Kang, ZHANG Xuan-hui, SHI You-bin （College of Science, Guangdong Ocean University, Zhanjiang 524088, China）
Abstract:
The formulas of equivalent radial grating constant d_⊥ and tangential grating constant d_// of CD are given. The values of d_⊥ and d_// are measured using He-Ne laser, coordinate paper and spectrometer. The maximum equivalent radius R and the minimum equivalent radius Rmi. of the CD data storage area are measured by using travelling microscope. The formula of the storage capacity V of CD, which is the function of d_⊥ ,d_// , R_max and R_min, is given. Compared with the industrial standard, the deviation of d_⊥ and d_// are 0.1% and 0.6% respectively. The deviation of V is 0.3% compared with measured value by computer. The reasons of the deviations are analyzed.[著者文摘]
Key words:
CD; grating constant; storage capacity; diffraction
更多>>免费文章
cqvip.com