Time-based unobtrusive active eye interrogation
US-2015374231-A1 · Dec 31, 2015 · US
Fundus photographing apparatus
US9380939B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9380939-B2 |
| Application number | US-201313930748-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 28, 2013 |
| Priority date | Jul 27, 2012 |
| Publication date | Jul 5, 2016 |
| Grant date | Jul 5, 2016 |
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Abstract
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A fundus photographing apparatus includes: a photographing unit including a fundus illumination optical system to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element to obtain a fundus image of the illuminated eye; and an alignment unit to position the photographing unit with the eye based on a predetermined alignment reference position. The alignment unit includes: an extracting part to extract, by image processing, an image region formed by reflection light from a portion other than the fundus from the fundus image obtained by the fundus photographing optical system; a gravity center calculating part to determine, by arithmetic processing, a gravity center position of the extracted image region; and a control part to perform alignment control of the photographing unit with the eye based on the calculated gravity center position and the alignment reference position.
First claim
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The invention claimed is: 1. A fundus photographing apparatus comprising: a photographing unit including a fundus illumination optical system configured to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element configured to obtain an image of the fundus of the patient's eye illuminated by the illumination optical system; and an alignment unit configured to position the photographing unit with the patient's eye based on…
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- What does patent US9380939B2 cover?
- A fundus photographing apparatus includes: a photographing unit including a fundus illumination optical system to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element to obtain a fundus image of the illuminated eye; and an alignment unit to position the photographing unit with the eye based on a predetermined alignment reference posit…
- Who is the assignee on this patent?
- Nidek Kk
- What technology area does this patent fall under?
- Primary CPC classification A61B3/152. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Jul 05 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).