Number | Name | Date | Kind |
---|---|---|---|
3920315 | Linke | Nov 1975 | |
4411488 | Neil | Oct 1983 | |
4623226 | Fujii | Nov 1986 | |
4632498 | Neil | Dec 1986 | |
4659171 | Neil | Apr 1987 | |
4676581 | Roberts | Jun 1987 | |
4695119 | Neil | Sep 1987 | |
4705363 | Ikemori | Nov 1987 | |
4708444 | Tsuji | Nov 1987 | |
4749265 | Hattori et al. | Jun 1988 | |
4838669 | Ogata et al. | Jun 1989 | |
5101299 | Iwasaki | Mar 1992 | |
5114238 | Sigler | May 1992 |
Number | Date | Country |
---|---|---|
3-293612 | Dec 1991 | JPX |
4-83215 | Mar 1992 | JPX |
4-172416 | Jun 1992 | JPX |
Entry |
---|
E. Betensky, "Zoom Lens Principles and Types", SPIE, vol. CR41, Warren J. Smith, Editor, pp. 88-116, 1992 (presented Jan. 1992). |
I. A. Neil, "Use of Chalcogenide Glass in Thermal Infrared Telescopes," 1980 International Lens Design Conference (OSA), SPIE, vol. 237, p. 429. |