Image pickup apparatus
US-2015326792-A1 · Nov 12, 2015 · US
Zoom lens system
US2015338621A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015338621-A1 |
| Application number | US-201414547298-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 19, 2014 |
| Priority date | May 26, 2014 |
| Publication date | Nov 26, 2015 |
| Grant date | — |
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- Title
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Abstract
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A zoom lens system capable of satisfactorily compensating for aberration, including, in an order from an object to an image, a first lens group having a negative refractive power, an aperture, and a second lens group having a positive refractive power, wherein the first lens group including a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, and wherein an Abbe number of the first lens is less than 30, an Abbe number of the second lens is greater than 45 and less than 65, and a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3.
First claim
Opening claim text (preview).
What is claimed is: 1 . A zoom lens system, in an order from an object to an image, comprising: a first lens group having a negative refractive power; an aperture; and a second lens group having a positive refractive power, wherein the first lens group comprises a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, wherein an Abbe number of the first lens is less than 30, wherein an Abbe number of the second lens is greater than 45 and less than 65, and wherein a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3. 2 . The zoom lens system of claim 1 , wherein the zoom lens system is configured to perform zooming by moving the second lens group in an optical axis direction. 3 . The zoom lens system of claim 1 , wherein the zoom lens system is configured to perform focusing by moving the first lens group in an optical axis direction. 4 . The zoom lens system of claim 1 , wherein each of the first, second and third lenses has a negative refractive power, the fourth lens has a positive refractive power, and the third and fourth lenses are cemented to each other. 5 . The zoom lens system of claim 1 , wherein the second lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens in the order from the object to the image, and wherein an Abbe number of the fifth lens is greater than 63, and an Abbe number of the tenth lens is less than 25. 6 . The zoom lens system of claim 5 , wherein each of the fifth lens, the sixth lens, the eighth lens, and the tenth lens has a positive refractive power, and each of the seventh lens and the ninth lens has a negative refractive power. 7 . The zoom lens system of claim 6 , wherein the fifth lens comprises at least one aspheric surface. 8 . The zoom lens system of claim 7 , wherein the fifth lens comprises two aspheric surfaces. 9 . The zoom lens system of claim 6 , wherein the tenth lens comprises at least one aspheric surface. 10 . The zoom lens system of claim 9 , wherein the tenth lens comprises two aspheric surfaces. 11 . The zoom lens system of claim 6 , wherein the tenth lens has a meniscus shape. 12 . An image capturing system comprising: an image pickup device configured to capture an image; and the zoom lens system of claim 1 .
Assignees
Inventors
Classifications
having two groups only · CPC title
- G02B15/177Primary
having a negative front lens or group of lenses · CPC title
Physics · mapped topic
having five or more lenses · CPC title
having zoom function · CPC title
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Frequently asked questions
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- What does patent US2015338621A1 cover?
- A zoom lens system capable of satisfactorily compensating for aberration, including, in an order from an object to an image, a first lens group having a negative refractive power, an aperture, and a second lens group having a positive refractive power, wherein the first lens group including a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, an…
- Who is the assignee on this patent?
- Hanwha Techwin Co Ltd, Samsung Techwin Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B15/177. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Nov 26 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).