# US 2015/0146296 A1 · Imaging Lens

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- Number: US 2015/0146296 A1
- Document ID: US20150146296A1
- Status: Published application
- Kind: A1
- Application number: 14/457,270
- Filed: 2014-08-12
- Published: 2015-05-28
- Earliest claimed: 2013-11-28
- Assignees: Kaleido Technology Aps; AAC Technologies Pte. Ltd.
- Inventors: Christian Holme; Jesper Offersgaard
- Web page: https://patentgrep.com/patent/US20150146296A1

## CPC

- G02B 13/0015: {characterised by the lens design}
- G02B 1/11: Anti-reflection coatings
- G02B 3/08: with discontinuous faces, e.g. Fresnel lens {(diffractive Fresnel lenses G02B5/1876)}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An imaging lens is disclosed. The imaging lens includes an optic substrate including an upper surface and a lower surface, a black coating at least partially covering the upper surface of the optic substrate, and an anti-reflection coating at least partially covering the black coating. Bu virtue of the configuration, unwanted stray light, or reflection from the black coating is greatly reduced.

## Claims

### Claim 1

An imaging lens, comprising:
an optic substrate, including an upper surface and a lower surface opposite to the upper surface;
a black coating at least partially covering the upper surface of the optic substrate;
an anti-reflection coating at least partially covering the black coating.

### Claim 2 (depends on 1)

The imaging lens as described in claim 1, wherein the lower surface of the optic substrate is also covered by an anti-reflection coating.

### Claim 3 (depends on 1)

The imaging lens as described in claim 1, wherein the upper surface of the optic substrate where the black coating does not cover is covered by an anti-reflection coating.

### Claim 4 (depends on 1)

The imaging lens as described in claim 1 further including a layer of UV glue between the optic substrate and the black coating.

### Claim 5 (depends on 1)

The imaging lens as described in claim 1 further including a layer of UV glue between the black coating and the anti-reflection coating.

### Claim 6 (depends on 3)

The imaging lens as described in claim 3 further including a layer of UV glue between the optic substrate and the anti-reflection coating.

### Claim 7 (depends on 3)

The imaging lens as described in claim 3, wherein the real refraction index of the optic substrate is equal to the real refraction index of the anti-reflection coating.