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US-2024280792-A1 · Aug 22, 2024 · US
Variable magnification optical system and imaging apparatus
US8947786B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8947786-B2 |
| Application number | US-201314061052-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 23, 2013 |
| Priority date | May 9, 2011 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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A variable magnification optical system includes, in order from the object side, a negative first lens group and a positive second lens group, wherein the interval between these lens groups in the optical axis direction is changed during magnification change. The most image-side lens and the second most image-side lens of the first lens group are a negative single lens with a concave surface facing the object side and a positive single lens, respectively. The second lens group includes, in order from the object side, a positive lens disposed at the most object-side position with at least one surface thereof being an aspherical surface, a first cemented lens formed by a negative lens and a positive lens, and a second cemented lens formed by a negative lens and a positive lens.
First claim
Opening claim text (preview).
What is claimed is: 1. A variable magnification optical system comprising, in order from an object side, a first lens group having a negative refractive power, a stop and a second lens group having a positive refractive power, the variable magnification optical system being configured such that magnification change is achieved by changing an interval between the first lens group and the second lens group in an optical axis direction, and correction of an image plane position along…
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Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
- G02B13/04Primary
Physics · mapped topic
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- What does patent US8947786B2 cover?
- A variable magnification optical system includes, in order from the object side, a negative first lens group and a positive second lens group, wherein the interval between these lens groups in the optical axis direction is changed during magnification change. The most image-side lens and the second most image-side lens of the first lens group are a negative single lens with a concave surface fa…
- Who is the assignee on this patent?
- Fujifilm Corp
- What technology area does this patent fall under?
- Primary CPC classification G02B13/04. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 03 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).