198117 ⎘
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor; Heads, e.g. forming of the optical beam spot or modulation of the optical beam; Means for guiding the beam from the source to the record carrier or from the record carrier to the detector; Lenses Fresnel lenses
OPTICAL SYSTEM FOR HOLOGRAPHIC STORAGE AND DESIGN METHOD FOR FRESNEL LENS AND META LENS THEREOF
#2Wireless device
#3COMPOSITE OPTICAL ELEMENT AND OPTICAL HEAD DEVICE
#4Micro-Fresnel zone plate optical devices using densely accumulated ray points
#5MULTIFOCAL OBJECTIVE LENS AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE
#6Objective optical system and optical pickup including the same
#7Objective Optical System and Optical Information Recording/Reproducing Device Having the Same
#8Objective lens optical system
#9Optical pickup device and optical disk drive
#10Liquid crystal lens element and optical head device
#11Method and apparatus for measuring interfacial positions, method and apparatus for measuring layer thickness, and method and apparatus for manufacturing optical discs
#12Liquid crystal lens element and optical head device
#13Liquid crystal lens element optical head device
#14Optical system for collimating elliptical light beam and optical device using the same
#15Integrated type optical head with sheet waveguide and light coupler
#16Hybrid lens unit and hybrid lens array