Optical module and manufacturing method thereof
US-9223108-B2 · Dec 29, 2015 · US
Projection optical apparatus and image projection apparatus
US9529175B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9529175-B2 |
| Application number | US-201514837379-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2015 |
| Priority date | Sep 1, 2014 |
| Publication date | Dec 27, 2016 |
| Grant date | Dec 27, 2016 |
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Abstract
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A disclosed projection optical apparatus includes a plurality of lenses, each of the lenses having a flat surface in a part of an outer circumference; a lens holder having a hollow cylindrical shape and configured to hold the lenses; and a vent hole formed of gaps communicating between the flat surfaces of the lenses and the lens holder.
First claim
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What is claimed is: 1. A projection optical apparatus comprising: a plurality of lenses, each of the lenses having a flat surface in a part of an outer circumference; a lens holder having a hollow cylindrical shape and configured to hold the lenses; and a vent hole formed of gaps communicating between the flat surfaces of the lenses and the lens holder. 2. The projection optical apparatus as claimed in claim 1 , wherein the lenses are disposed such that…
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Frequently asked questions
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- What does patent US9529175B2 cover?
- A disclosed projection optical apparatus includes a plurality of lenses, each of the lenses having a flat surface in a part of an outer circumference; a lens holder having a hollow cylindrical shape and configured to hold the lenses; and a vent hole formed of gaps communicating between the flat surfaces of the lenses and the lens holder.
- Who is the assignee on this patent?
- Matsuyama Toshinobu, Ricoh Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B7/028. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 27 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).