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去年,对于ISOM/ODS,索尼公司提议采用PSR这一新技术.所谓PSR就是指在再生用光盘系统中,通过利用超分辨率现象来提高信号再生时的分辨率,能够检测出以往所不能检测的微小的信息,以开辟高密度光盘之路的新技术.超分辨率现象是当光盘信号表面上形成的相变膜之一部分,在激光照射点内被溶解时产生.在去年发表的文章中,作为再生光学系统,是利用波长780nm激光二极管和NA=0.50的物镜进行了信号再生.而这次为了进一步验证高密度化的可能性,利用SHG绿激光器和高NA物镜重新进行信号再生,其结果,在今年光存储讨论会上发表过.现将其内容归纳如下:
Last year, for ISOM / ODS, Sony proposed the new PSR technology called PSR, which refers to the use of super-resolution to improve the resolution of signal reproduction during reproduction. In order to open up a new technology for high-density optical disc. Super-resolution phenomenon occurs when a part of the phase change film formed on the surface of a disc signal is dissolved in a laser irradiation spot. In an article published last year , And as a reproducing optical system, signal reproduction was performed by using a laser diode with a wavelength of 780 nm and an objective lens with NA = 0.50 This time, in order to further verify the possibility of increasing the density, signal regeneration was again performed using an SHG green laser and a high NA objective As a result, it was published at this year’s Optical Storage Symposium, and its contents are summarized as follows: