Optical apparatus and three-dimensional modeling apparatus
US-2024064275-A1 · Feb 22, 2024 · US
Illumination device, projection type image display device, and optical device
US8992029B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8992029-B2 |
| Application number | US-201214115727-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 23, 2012 |
| Priority date | May 10, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11 ; a lens array 22 including a plurality of element lenses and configured to diverge the light scanned by the optical scanning section; an optical path conversion system 23 configured to control a diverging angle of the diverging light to be emitted from respective points of the lens array 22 and to allow the diverging light whose diverging angle has been controlled to illuminate an area to be illuminated sequentially in an overlapping manner.
First claim
Opening claim text (preview).
The invention claimed is: 1. A projection type image display device comprising: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; a lens array including a plurality of element lenses and configured to diverge the light scanned by the optical scanning section; an optical modulation element having an image formation area in which an image is formed; an optical path conversion system configured t…
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Mechanical Engineering · mapped topic
Physics · mapped topic
Physics · mapped topic
Mechanical Engineering · mapped topic
- H04N9/3129Primary
Electricity · mapped topic
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- What does patent US8992029B2 cover?
- To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from t…
- Who is the assignee on this patent?
- Taniguchi Yukio, Kurashige Makio, Ooyagi Yasuyuki, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H04N9/3129. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 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).