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| Number | Title | Issue Date |
| 7898743 | Image forming optical system and electronic image pickup apparatus using image forming optical system An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group is disposed at an object side of the ap... | 03/01/2011 |
| 7848030 | Image forming optical system and electronic image pickup apparatus using image forming optical system In an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group being disposed at an image-plane side of the aperture stop and having a cemented lens, and when a straight line indicated by Nd=α×... | 12/07/2010 |
| 7800832 | Image forming optical system and electronic image pickup apparatus using image forming optical system An optical system has a positive lens group, a negative lens group, and an aperture stop. The negative lens group is disposed at an object side of the aperture stop and has a cemented lens, and in a rectangular coordinate system in which a horizontal axis is Nd and ... | 09/21/2010 |
| 7715108 | Image forming optical system and electronic image pickup apparatus using image forming optical system In an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an image side of the of the aperture stop, the negative lens group has a cemented ... | 05/11/2010 |
