MINIATURE ZOOM LENS
First Claim
Patent Images
1. 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.
1 Assignment
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Accused Products
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.
3 Citations
9 Claims
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1. Miniature zoom lens, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Digital video recording device, comprising:
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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.
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9. Mobile telephone, comprising:
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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.
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Specification