# US 7,411,738 B1 · Composite lens and method for manufacturing the same

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- Number: US 7,411,738 B1
- Document ID: US7411738B1
- Status: Granted
- Kind: B1
- Application number: 11/769,656
- Filed: 2007-06-27
- Granted: 2008-08-12
- Earliest claimed: 2007-03-14
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Inventors: Jen-Tsorng Chang
- Web page: https://patentgrep.com/patent/US7411738B1

## CPC

- G02B 3/0087: {with index gradient}
- G02B 7/022: {lens and mount having complementary engagement means, e.g. screw/thread}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An exemplary composite lens includes a main body and an embedding member. The main body has a first surface and an opposite second surface. The main body has an optical axis associated therewith. The embedding member is disposed in the main body between the first surface and the second surface. A main plane of the embedding member is perpendicular to the optical axis of the main body. A refractive index of a material of the embedding member is higher than that of the main body. The composite lenses can be made thinner. A method for manufacturing the composite lens is also provided.

## Claims

### Claim 1

A composite lens, comprising:
a main body having a first surface and an opposite second surface, the main body having an optical axis associated therewith; and
an embedding member disposed in the main body between the first surface and the second surface, a main plane of the embedding member being perpendicular to the optical axis of the main body, a refractive index of a material of the embedding member is higher than that of the main body.

### Claim 2 (depends on 1)

The composite lens as claimed in claim 1, wherein the material of the embedding member is selected from a group consisting of glass and plastic.

### Claim 3 (depends on 1)

The composite lens as claimed in claim 1, wherein the first and second surfaces each have a curved portion, a projection area of the embedding member on a plane perpendicular to the optical axis being smaller than a projection area of the main body on the plane perpendicular to the optical axis, and being larger than a larger one of projection areas of the curved portions of the first surface and the second surface on the plane perpendicular to the optical axis.

### Claim 4 (depends on 1)

The composite lens as claimed in claim 1, wherein a gradient refractive index coating is formed on at least one of opposite surfaces of the embedding member.

### Claim 5 (depends on 4)

The composite lens as claimed in claim 4, wherein the gradient refractive index coating comprises a plurality of titanium dioxide layers and a plurality of silica dioxide layers alternately stacked one on another.

### Claim 6 (depends on 1)

The composite lens as claimed in claim 1, wherein the main body is comprised of a material selected from a group consisting of cyclic olefin polymer or cyclic olefin copolymer.

### Claim 7 (depends on 6)

The composite lens as claimed in claim 6, wherein the embedding member is comprised of polyimide.

### Claim 8 (depends on 1)

The composite lens as claimed in claim 1, wherein the embedding member extends through the main body.

### Claim 9 (depends on 1)

A method for manufacturing a composite lens, comprising the steps of:
attaching an embedding member on a first molding surface of a first mold part of an injection mold;
attaching a second mold part to the first mold of the injection mold to form a molding cavity, thereby fixing the embedding member in the molding cavity between the first molding surface of the first mold part and a second molding surface of the second mold part; and
injecting a plastic material for forming a main body into the molding cavity so as to obtain a composite lens as claimed in claim 1, wherein a refractive index of a material of the embedding member is higher than that of the main body.

### Claim 10 (depends on 9)

The method as claimed in claim 9, wherein in the step of attaching the embedding member, the embedding member includes a fastener, the embedding member is fixed onto the first molding surface of the first mold part using the fastener.

### Claim 11 (depends on 10)

The method as claimed in claim 10, wherein the embedding member is a glass plate and is fixed onto the first molding surface of the first mold part using the fastener, wherein the fastener comprises a clamp configured for clamping the embedding member in place.

### Claim 12 (depends on 10)

The method as claimed in claim 10, wherein the embedding member is a plastic film and is conveyed onto the first molding surface of the first mold part using the fastener that comprises a rolling device configured for rolling the embedding member.

### Claim 13 (depends on 9)

The method as claimed in claim 9, wherein in the step of attaching a second mold part to the first mold, two cutting devices disposed in the second molding surface of the second mold part cooperate with two grooves defined in the first molding surface of the first mold part to cut the embedding member.