Optical system and camera module comprising same
US-2024377616-A1 · Nov 14, 2024 · US
Zoom lens and image pickup apparatus including the same
US8934047B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934047-B2 |
| Application number | US-201313953172-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 29, 2013 |
| Priority date | Aug 17, 2012 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power and the positive refractive power; and a fifth lens unit having the positive refractive power, in which a lateral magnification (β 2 w ) of the second lens unit at a wide angle end when an object distance is infinity, and a ratio of a focal length (f 2 ) of the second lens unit and a focal length (f 3 ) of the third lens unit are appropriately set.
First claim
Opening claim text (preview).
What is claimed is: 1. A zoom lens, comprising, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power and the positive refractive power; and a fifth lens unit having the…
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Electricity · mapped topic
- G02B15/14Primary
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
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- What does patent US8934047B2 cover?
- Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power…
- Who is the assignee on this patent?
- Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification G02B15/14. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).