DVD recorded density is mainly limited by laser wavelength, It is important to study short wavelength laser for super high density DVD system.
激光波长是限制 DVD记录密度提高的关键因素 ,研制短波长激光器是超高密度 DVD用光源的重要发展方向。
Based on atmospheric correction formula of ETS(Electronic Total Station),the paper presents a new method to calculate constants of distance surveying part of ETS(including atmospheric reflection ratio of standard atmospheric state and the carrier wavelength of laser).
该文在电子全站仪气象改正公式的基础上,提出了计算测距部常数(标准大气状态下的大气折射率、激光器载波波长)的新方法。
High frequency modulation characteristics of specific wavelength laser diode with narrowband filter;
窄带滤光片精确波长激光器高频调制特性研究