Optical lens and electronic apparatus including the lens
US-9223113-B2 · Dec 29, 2015 · US
Imaging lens and imaging device
US9360656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9360656-B2 |
| Application number | US-201314375968-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 22, 2013 |
| Priority date | Mar 29, 2012 |
| Publication date | Jun 7, 2016 |
| Grant date | Jun 7, 2016 |
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Abstract
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An imaging lens is provided with: a first lens with negative power; a second lens with negative power; a third lens with positive power; and a fourth lens with positive power. The cemented fourth lens is formed from an object side lens with negative power and an image side lens with positive power. The thickness of a resin adhesive layer that bonds the object side lens and the image side lens is 20 μm or greater on the optical axis, and when Sg1H is the amount of sag in the image side lens surface of the object side lens and Sg2H is the amount of sag in the object side lens surface of the image side lens. The bonding operation is easy without damage occurring to the cemented surfaces, with a design that takes into account thickness of the resin adhesive layer; therefore various forms of aberration can be corrected.
First claim
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The invention claimed is: 1. An imaging lens comprising: a first lens having negative power, a second lens having negative power, a third lens having positive power, and a fourth lens having positive power arranged in order from an object side toward an image side, wherein the fourth lens is a cemented lens composed of an object side lens having negative power and an image side lens having positive power, and is provided with a resin adhesive layer bonding the object side lens a…
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- What does patent US9360656B2 cover?
- An imaging lens is provided with: a first lens with negative power; a second lens with negative power; a third lens with positive power; and a fourth lens with positive power. The cemented fourth lens is formed from an object side lens with negative power and an image side lens with positive power. The thickness of a resin adhesive layer that bonds the object side lens and the image side lens i…
- Who is the assignee on this patent?
- Hitachi Maxell
- What technology area does this patent fall under?
- Primary CPC classification G02B9/34. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 07 2016 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).