# US 2019/0317318 A1 · Optical element and imaging lens

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- Number: US 2019/0317318 A1
- Document ID: US20190317318A1
- Status: Published application
- Kind: A1
- Application number: 16/185,977
- Filed: 2018-11-09
- Published: 2019-10-17
- Earliest claimed: 2017-11-10
- Assignees: Kantatsu Co., Ltd.
- Applicants: Kantatsu Co., Ltd.
- Inventors: Nobuyuki OOTSU; Koji YOSHIKAWA
- Web page: https://patentgrep.com/patent/US20190317318A1

## CPC

- G02B 27/0018: {with means for preventing ghost images (anti-reflection coatings G02B1/11)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

There is provided an optical element, an imaging lens and an imaging device preventing from occurring ghosts and flares caused by unnecessary light reflected on a surface of the edge part or inside the same of the optical element, and reproducing a clear image quality. The optical element 100 comprises an effective optical portion 101, 103 and an edge part 102, 104 forming at the circumference of the effective optical portion 101, 103. A light shielding area SSI which changes in quality by laser irradiation is provided from a surface to the inside of the edge part or the inside of the same.

## Claims

### Claim 1

An optical element comprising an effective optical portion and an edge part formed at the circumference of said effective optical portion, wherein a light shielding area is provided inside of said edge part or from the surface to the inside of the same.

### Claim 2 (depends on 1)

The optical element according to claim 1, wherein said light shielding area is formed with an altered part which a base material changes in quality.

### Claim 3 (depends on 2)

The optical element according to claim 2, wherein said altered part is formed continuously and linearly.

### Claim 4 (depends on 2)

The optical element according to claim 2, wherein said altered part is formed like dot-shape and intermittently with an interval.

### Claim 5 (depends on 3)

The optical element according to claim 3, wherein said altered part is formed all over the circumference of said effective optical portion.

### Claim 6 (depends on 3)

The optical element according to claim 3, wherein a width of a line of said altered part formed continuously and linearly is 0.2 μm or more.

### Claim 7 (depends on 4)

The optical element according to claim 4, wherein size of a dot of said altered part formed like dot-shape and intermittently with an interval is 0.2 μm or more.

### Claim 8 (depends on 1)

An imaging lens comprising an optical element according to claim 1.

### Claim 9 (depends on 4)

The optical element according to claim 4, wherein said altered part is formed all over the circumference of said effective optical portion.

### Claim 10 (depends on 2)

An imaging lens comprising an optical element according to claim 2.

### Claim 11 (depends on 3)

An imaging lens comprising an optical element according to claim 3.

### Claim 12 (depends on 4)

An imaging lens comprising an optical element according to claim 4.

### Claim 13 (depends on 5)

An imaging lens comprising an optical element according to claim 5.

### Claim 14 (depends on 6)

An imaging lens comprising an optical element according to claim 6.