Number | Date | Country | Kind |
---|---|---|---|
11-174912 | Jun 1999 | JP |
Number | Name | Date | Kind |
---|---|---|---|
4256374 | Mickleson | Mar 1981 | A |
6049430 | Heanue et al. | Apr 2000 | A |
6055113 | Yamamoto et al. | Apr 2000 | A |
Number | Date | Country |
---|---|---|
0 840 156 | May 1998 | EP |
10-123410 | May 1998 | JP |
Entry |
---|
Yamamoto et al, “0.8-Numerical-Apreture Two-Element Objective Lens for the Optical Disk,” Japanese Journal of Applied Physics, vol. 36, Part 1, No. 1B (Jan. 1997).* |
Narahara et al, “Optical Disc System for Digital Video Recording,” Society of Photo-Optical Instrumentation Engineers, copyright 1999 (printed from the website of Philips Research).* |
“Principles of Optics”, Max Born and Emil Wolf, Third Edition 1965, pp.24-29. |