Light source alignment system
US-2024401779-A1 · Dec 5, 2024 · US
Illumination device
US9217552B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9217552-B2 |
| Application number | US-201314417235-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 2, 2013 |
| Priority date | Jul 27, 2012 |
| Publication date | Dec 22, 2015 |
| Grant date | Dec 22, 2015 |
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Abstract
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A lighting device ( 100 ) includes: a surface light source ( 1 ); a first lens (L 1 ) having a first focal point (F 1 ), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L 2 ) having a second focal point (F 2 ), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I 1 ) is formed by the first lens and a second virtual image (I 2 ) is formed by the second lens, wherein the first virtual image (I 1 ) is formed between the second focal point (F 2 ) and the first lens, the second focal point (F 2 ) is on a side opposite to the light source side relative to a predetermined focal position f′, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B 1 -B 4 ) whose curvatures vary discontinuously are provided in the non-revolution surface.
First claim
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The invention claimed is: 1. A lighting device, comprising: a surface light source having a light exit surface; a first lens having a first focal point, the first lens being provided on the light exit surface side of the surface light source; and a second lens having a second focal point, the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual imag…
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- What does patent US9217552B2 cover?
- A lighting device ( 100 ) includes: a surface light source ( 1 ); a first lens (L 1 ) having a first focal point (F 1 ), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L 2 ) having a second focal point (F 2 ), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and …
- Who is the assignee on this patent?
- Sharp Kk, Univ Tohoku
- What technology area does this patent fall under?
- Primary CPC classification F21V5/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 22 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).