Miniature zoom lens
AssigneeQioptiq Photonics GmbH & Co. KG
InventorWitold HACKEMER
Life of this patent
Estimating the term…
Abstract
A Miniature zoom lens, in particular for use in mobile telephones, in which the zoom lens, as viewed from the object plane, has the following in the stated sequence: at least one negative first optical lens group, at least one negative second optical lens group, at least one positive third optical lens group, and at least one positive fourth optical lens group. The second, third, and fourth optical lens groups are configured in such a way that focusing is achieved solely by displacement of the fourth optical lens group, and during the focusing the positions of the second and third lens groups remain unchanged.
Claims9
Miniature zoom lens, comprising:
- a) the zoom lens, as viewed from the object plane, includes at least the following in the stated sequence:
- i) one negative first optical lens group;
- ii) one negative second optical lens group;
- iii) one positive third optical lens group;
- and
- iv) one positive fourth optical lens group;
- and
- b) the second, third, and fourth optical lens groups being configured in such a way that focusing is achieved solely by displacement of the fourth optical lens group, and during the focusing the positions of the second and third lens groups remain unchanged.
Digital video recording device, comprising:
- a) a digital image recorder;
- b) a miniature zoom lens, and the zoom lens, as viewed from the object plane, includes at least the following in the stated sequence:
- i) one negative first optical lens group;
- ii) one negative second optical lens group;
- iii) one positive third optical lens group;
- and
- iv) one positive fourth optical lens group;
- and
- c) the second, third, and fourth optical lens groups being configured in such a way that focusing is achieved solely by displacement of the fourth optical lens group, and during the focusing the positions of the second and third lens groups remain unchanged.
Mobile telephone, comprising:
- a) a digital image recorder;
- b) a miniature zoom lens, and the zoom lens, as viewed from the object plane, includes at least the following in the stated sequence:
- i) one negative first optical lens group;
- ii) one negative second optical lens group;
- iii) one positive third optical lens group;
- and
- iv) one positive fourth optical lens group;
- and
- c) the second, third, and fourth optical lens groups being configured in such a way that focusing is achieved solely by displacement of the fourth optical lens group, and during the focusing the positions of the second and third lens groups remain unchanged.
Dependencies are inferred from the claim text.