Camera optical lens
US-2024427116-A1 · Dec 26, 2024 · US
Inner focus lens system, interchangeable lens apparatus and camera system
US8976458B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8976458-B2 |
| Application number | US-201313940285-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 12, 2013 |
| Priority date | Jul 20, 2012 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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An inner focus lens system comprising a first lens unit and subsequent lens units, wherein an aperture diaphragm is provided, the first lens unit is: fixed with respect to an image surface in focusing; and composed of five or more lens elements including a first positive lens element located closest to the object side and a second positive lens element, the subsequent lens units include at least a first focusing lens unit located closest to the object side and a second focusing lens unit, at least one of the first focusing lens unit and the second focusing lens unit is composed of two or less lens elements, at least one lens element is provided on the image side relative to the aperture diaphragm, and the condition: N F1 ≦N F2 (N F1 , N F2 : the number of lens elements constituting the first, second focusing lens unit) is satisfied.
First claim
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What is claimed is: 1. An inner focus lens system, in order from an object side to an image side, comprising a first lens unit, and subsequent lens units, wherein an aperture diaphragm is provided, the first lens unit is fixed with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition, the first lens unit is composed of five or more lens elements including: a first positive lens element being located closest to the obj…
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- What does patent US8976458B2 cover?
- An inner focus lens system comprising a first lens unit and subsequent lens units, wherein an aperture diaphragm is provided, the first lens unit is: fixed with respect to an image surface in focusing; and composed of five or more lens elements including a first positive lens element located closest to the object side and a second positive lens element, the subsequent lens units include at leas…
- Who is the assignee on this patent?
- Panasonic Corp, Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B13/0015. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 10 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).