Changeable lens barrel
US-2015331221-A1 · Nov 19, 2015 · US
Zoom lens barrel
US9488798B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9488798-B2 |
| Application number | US-201313739221-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 11, 2013 |
| Priority date | Jan 25, 2012 |
| Publication date | Nov 8, 2016 |
| Grant date | Nov 8, 2016 |
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Abstract
Official abstract text for this publication.
A zoom lens barrel includes front and rear lens group support frames, a first spring member provided to bias the front lens group support frame and a diaphragm in directions away from each other, and a second spring member provided to bias the diaphragm and the rear lens group support frame in directions away from each other. Spring loads of the first and second spring members are determined such that, when the front and rear lens group support frames approach each other during zooming, one and the other of the first and second spring members are compressed and not compressed, and the other of the first and second spring members is compressed after the one of the first and second spring members is fully compressed.
First claim
Opening claim text (preview).
What is claimed is: 1. A zoom lens barrel provided with a front lens group, a rear lens group and a diaphragm, which is movable in the optical axis direction and positioned between said front lens group and said rear lens group, wherein said front lens group, said rear lens group and said diaphragm are supported to be movable relative to one another in an optical axis direction and move relative to one another in said optical axis direction during zooming, said zoom lens barrel com…
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- What does patent US9488798B2 cover?
- A zoom lens barrel includes front and rear lens group support frames, a first spring member provided to bias the front lens group support frame and a diaphragm in directions away from each other, and a second spring member provided to bias the diaphragm and the rear lens group support frame in directions away from each other. Spring loads of the first and second spring members are determined su…
- Who is the assignee on this patent?
- Hoya Corp
- What technology area does this patent fall under?
- Primary CPC classification G02B7/10. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 08 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).