Endoscope and method for producing endoscope
US-2024315534-A1 · Sep 26, 2024 · US
Imaging Lens System
US2016274349A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016274349-A1 |
| Application number | US-201514661016-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 18, 2015 |
| Priority date | Mar 18, 2015 |
| Publication date | Sep 22, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
An imaging lens system includes a lens and a transparent plate. The lens is disposed between an object and a sensor, and the lens includes a flat surface facing the object and an aspheric surface facing the sensor. The transparent plate is connected to the lens and disposed between the object and the lens. An abbe number of the lens is in a range from 30 to 50, an abbe number of the transparent plate is in a range from 40 to 60, and an effective focal length (EFL) of the imaging lens system is in a range from about 0.3 millimeters to about 0.4 millimeters.
First claim
Opening claim text (preview).
What is claimed is: 1 . An imaging lens system, comprising: a lens disposed between an object and a sensor, wherein the lens comprises a flat surface facing the object and an aspheric surface facing the sensor; and a transparent plate connected to the lens and disposed between the object and the lens, wherein an abbe number of the lens is in a range from 30 to 50, an abbe number of the transparent plate is in a range from 40 to 60, and an effective focal length (EFL) of the imaging lens system is in a range from about 0.3 millimeters to about 0.4 millimeters. 2 . The imaging lens system of claim 1 , wherein the refractive indexes of the lens and the transparent plate are both in the range from about 1.5 to about 1.6. 3 . The imaging lens system of claim 1 , further comprising an aperture stop disposed on a surface of the transparent plate facing the object. 4 . The imaging lens system of claim 1 , wherein the flat surface is connected to the transparent plate. 5 . The imaging lens system of claim 1 , wherein the thickness of the transparent plate is in a range from 0.2 millimeters to 0.6 millimeters, and the thickness of the lens is in range from 0.1 millimeters to 0.3 millimeters. 6 . The imaging lens system of claim 1 , wherein the aspheric surface is convex. 7 . The imaging lens system of claim 1 , wherein the transparent plate is a flat plate. 8 . The imaging lens system of claim 1 , wherein the imaging lens system is applicable to an endoscope, and an outer surface of the endoscope comprises a surface of the transparent plate facing the object. 9 . The imaging lens system of claim 1 , wherein the lens and the transparent plate are made of different materials. 10 . The imaging lens system of claim 1 , wherein a difference between the refractive index of the lens and the refractive index of the transparent plate is less than 0.1.
Assignees
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Classifications
- G02B23/243Primary
Objectives for endoscopes · CPC title
having one lens only · CPC title
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Frequently asked questions
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- What does patent US2016274349A1 cover?
- An imaging lens system includes a lens and a transparent plate. The lens is disposed between an object and a sensor, and the lens includes a flat surface facing the object and an aspheric surface facing the sensor. The transparent plate is connected to the lens and disposed between the object and the lens. An abbe number of the lens is in a range from 30 to 50, an abbe number of the transparent…
- Who is the assignee on this patent?
- Himax Tech Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B23/243. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Sep 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).