Optical system and camera module comprising same
US-2024377616-A1 · Nov 14, 2024 · US
Imaging lens
US8941772B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941772-B2 |
| Application number | US-201313937260-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 9, 2013 |
| Priority date | Jul 31, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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An imaging lens includes four lenses arranged in order from the object side to the image side: an aperture stop, positive (refractive power) first lens having a convex object-side surface near the optical axis, second lens having a positive meniscus shape near the axis, positive third lens having a convex image-side surface near the axis, and negative fourth lens having a concave image-side surface near the axis. All lens surfaces are aspheric. The image-side aspheric surface of the fourth lens has a pole-change point off the optical axis and conditional expressions (1) and (2) are satisfied: 0.75< TLA /(2 IH )<0.90 (1) 0.90< TLA/f <1.30 (2) where TLA: distance on the optical axis from the first lens's object-side surface to the image sensor's image plane without a filter between the fourth lens and image sensor IH: maximum image height f: overall optical system focal length.
First claim
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What is claimed is: 1. An imaging lens for a solid-state image sensor in which lenses are arranged in order from an object side to an image side, comprising: a first lens with positive refractive power having a convex surface on the object side near an optical axis; a second lens having a positive meniscus shape near the optical axis; a third lens with positive refractive power having a convex surface on the image side near the optical axis; and a fourth lens with negative r…
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- What does patent US8941772B2 cover?
- An imaging lens includes four lenses arranged in order from the object side to the image side: an aperture stop, positive (refractive power) first lens having a convex object-side surface near the optical axis, second lens having a positive meniscus shape near the axis, positive third lens having a convex image-side surface near the axis, and negative fourth lens having a concave image-side sur…
- Who is the assignee on this patent?
- Kantatsu Co Ltd
- 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 27 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).