Camera optical lens
US-2024427116-A1 · Dec 26, 2024 · US
Wide-angle lens and imaging device
US9019342B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9019342-B2 |
| Application number | US-201214233347-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 23, 2012 |
| Priority date | Jul 25, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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- Title
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Abstract
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A wide-angle lens having a field angle larger than 180 degrees includes, in order from an object side to an image side, a front group, a reflection surface, and a back group, wherein the front group includes three lenses having a negative refractive power, the reflection surface is configured to curve an optical axis of the front group at 90 degrees toward the back group, the back group includes four lenses having a positive refractive power, a front principle point is set between a second lens and a third lens from the object side in the front group, and a focal length of an entire system f and a distance between an intersection of the reflection surface and the optical axis of the front group and the front principle point d satisfy the following condition (1) 7.0<d/f<9.0.
First claim
Opening claim text (preview).
The invention claimed is: 1. A wide-angle lens having a field angle larger than 180 degrees, comprising: in order from an object side to an image side, a front group; a reflection surface; and a back group, wherein the front group includes three lenses having a negative refractive power, the reflection surface is configured to curve an optical axis of the front group at 90 degrees toward the back group, the back group includes four lenses having a positive refractive pow…
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Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
- G02B13/06Primary
Physics · mapped topic
- G02B19/008Primary
Physics · mapped topic
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- What does patent US9019342B2 cover?
- A wide-angle lens having a field angle larger than 180 degrees includes, in order from an object side to an image side, a front group, a reflection surface, and a back group, wherein the front group includes three lenses having a negative refractive power, the reflection surface is configured to curve an optical axis of the front group at 90 degrees toward the back group, the back group include…
- Who is the assignee on this patent?
- Satoh Hiroyuki, Terao Noriyuki, Irino Yoshiaki, and 9 more
- What technology area does this patent fall under?
- Primary CPC classification G02B13/06. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 28 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).