首页>
外国专利>
Kind identifying apparatus, kind identifying method, and identifying program
Kind identifying apparatus, kind identifying method, and identifying program
展开▼
机译:种类识别装置,种类识别方法和识别程序
展开▼
页面导航
摘要
著录项
相似文献
摘要
There is provided a type judgment device capable of rapidly and safely identifying the type of an optical disc while preventing unexpected information recording or information erase. An optical beam as parallel light is applied in a circular polarized state to an optical disc having recording tracks and the polarization characteristic in the reflected light is detected. According to the detected polarization characteristic, the type of the disc is judged in accordance with the interval of the adjacent recording tracks.
展开▼