Optical system and camera module comprising same
US-2024377616-A1 · Nov 14, 2024 · US
Zoom lens, image-pickup apparatus having the same, and image projection apparatus having the same
US8970967B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8970967-B2 |
| Application number | US-201314031718-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 19, 2013 |
| Priority date | Sep 21, 2012 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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The zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a rear unit including one or more lens units, a distance between every adjacent lens units varies during zooming, and an aperture diaphragm on the image side of the first lens unit, a combined focal length of the rear unit at a wide-angle end being positive. One lens unit LG on the object side of the aperture diaphragm is made of a solid material, and includes an optical element GnNL having a negative refractive power and another optical element having a positive refractive power, and the predetermined conditions are satisfied.
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 negative refractive power, a rear unit including one or more lens units, a distance between every adjacent lens units varies during zooming, and an aperture diaphragm disposed on the image side of the first lens unit, a combined focal length of the rear unit at a wide-angle end being positive, wherein one lens unit LG on the object side of the aperture diaphragm…
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Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
- G02B15/14Primary
Physics · mapped topic
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- What does patent US8970967B2 cover?
- The zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a rear unit including one or more lens units, a distance between every adjacent lens units varies during zooming, and an aperture diaphragm on the image side of the first lens unit, a combined focal length of the rear unit at a wide-angle end being positive. One lens unit…
- 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 Mar 03 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).