A high-NA solid immersion objective for imaging a Blue-ray disc and investigating subsurface damage

Victor Densmore, Young Sik Kim, Tom Milster, Matt Watson, Dolaphine Kwok

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Nano-scale resolution in miniature optical systems has been realized in the optical data storage industry. Numerical apertures greater than unity have been achieved in by utilizing the high index material of a hemispherical Solid Immersion Lens (SIL), which increases the resolution of the backing objective by a factor that is related to the refractive index of the SIL. In this research, a custom Hyper-Blu-Disc (HBD) NA=1.4 SIL objective is utilized for high-fidelity readout of data pits beneath a 100μm thick cover layer on an optical Blu-Ray Disc. If realized commercially, the increase in data density could be 3X today's Blu-Ray technology. A distinct difference between this work and other work with SILs in optical data storage is the relatively thick cover layer of 100μm. Recently, there has been interest in discovering new ways to apply the technology and methods used in optical data storage for other means. The inherent design of the HBD objective to image through a shallow layer of dielectric material may lend itself to be used as an effective means for characterizing subsurface damage in optical materials. This research will furthermore investigate the HBD objective as a means of detecting subsurface damage

Original languageEnglish (US)
Title of host publicationOptical Data Storage 2014
EditorsThomas D. Milster, Ryuichi Katayama
ISBN (Electronic)9781628412284
StatePublished - 2014
EventOptical Data Storage Conference, ODS 2014 - San Diego, United States
Duration: Aug 18 2014Aug 19 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical Data Storage Conference, ODS 2014
Country/TerritoryUnited States
CitySan Diego


  • Blu-ray
  • High NA
  • Solid immersion lens
  • Subsurface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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