# US 11,906,666 B2 · Optical device having two scanning components

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- Number: US 11,906,666 B2
- Document ID: US11906666B2
- Status: Granted
- Kind: B2
- Application number: 18/054,969
- Filed: 2022-11-14
- Published: 2023-05-11
- Granted: 2024-02-20
- Earliest claimed: 2019-09-04
- Assignees: Lumentum Operations LLC
- Applicants: Lumentum Operations LLC
- Inventors: Jiamin Zheng; Barrie P. Keyworth; Wenlin Jin
- Web page: https://patentgrep.com/patent/US11906666B2

## CPC

- G01S 7/4817: {relating to scanning}
- G02B 26/101: {with both horizontal and vertical deflecting means, e.g. raster or XY scanners (colour television using laser beams scanning a display screen H04N9/3129)}
- G02B 27/0955: {Lenses (lenses per se G02B3/00)}
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical device may include a lens system. The optical device may include a first scanning component to receive an optical beam and to scan the lens system with the optical beam. The optical device may include a second scanning component to receive the optical beam from the lens system and to scan a field of view with the optical beam, where the lens system is positioned between the first scanning component and the second scanning component. The lens system may include a beam expander.

## Claims

### Claim 1

An optical device, comprising:
a first scanning component configured to receive an optical beam along an optical axis;
a second scanning component spaced apart from the first scanning component along the optical axis; and
a lens system positioned between the first scanning component and the second scanning component,
wherein the lens system is configured to:
receive the optical beam from the first scanning component,
change a collimated beam size of the optical beam, and
refract the optical beam to prevent an angular offset of the optical beam from translating into a spatial offset of the optical beam on the second scanning component.

### Claim 2 (depends on 1)

The optical device of claim 1, wherein the lens system includes a first lens to increase the collimated beam size of the optical beam.

### Claim 3 (depends on 1)

The optical device of claim 1, wherein the lens system includes a second lens to collimate the optical beam.

### Claim 4 (depends on 1)

The optical device of claim 1, wherein the lens system includes a first lens with a first focal length and a second lens with a second focal length, and
wherein the change in the collimated beam size is based at least in part on a difference between the first focal length and the second focal length.

### Claim 5 (depends on 1)

The optical device of claim 1, wherein the first scanning component is configured to tilt around an axis to create an angular offset of the optical beam relative to the optical axis.

### Claim 6 (depends on 5)

The optical device of claim 5, wherein the second scanning component is configured to tilt around the axis.

### Claim 7 (depends on 1)

The optical device of claim 1, wherein the lens system includes at least one of a filter or a diffractive optical element positioned at a focal point of the lens system to refract the optical beam.

### Claim 8

An optical device, comprising:
a first scanning component configured to receive an optical beam along an optical axis,
wherein the first scanning component is configured to tilt around an axis to create an angular offset of the optical beam relative to the optical axis;
a second scanning component spaced apart from the first scanning component along the optical axis,
wherein the second scanning component is configured to tilt around the axis; and
a lens system positioned between the first scanning component and the second scanning component,
wherein the lens system is configured to:
receive the optical beam from the first scanning component,
increase a collimated beam size of the optical beam, and
refract the optical beam to prevent an angular offset of the optical beam from translating into a spatial offset of the optical beam on the second scanning component.

### Claim 9 (depends on 8)

The optical device of claim 8, wherein the lens system includes a first lens to increase the collimated beam size of the optical beam.

### Claim 10 (depends on 8)

The optical device of claim 8, wherein the lens system includes a second lens to collimate the optical beam.

### Claim 11 (depends on 8)

The optical device of claim 8, wherein the lens system includes a first lens with a first focal length and a second lens with a second focal length, and
wherein the increase in the collimated beam size is based at least in part on a difference between the first focal length and the second focal length.

### Claim 12 (depends on 8)

The optical device of claim 8, wherein the lens system includes a first lens with a first focal point and a second lens with a second focal point, and
wherein the first scanning component is located at the first focal point, and
wherein the second scanning component is located at the second focal point.

### Claim 13 (depends on 8)

The optical device of claim 8, wherein the lens system is further configured to provide angular dependent modification to the optical beam.

### Claim 14 (depends on 8)

The optical device of claim 8, wherein the lens system includes at least one of a filter or a diffractive optical element positioned at a focal point of the lens system to refract the optical beam.

### Claim 15

An optical device, comprising:
a first scanning component configured to receive an optical beam along an optical axis;
a second scanning component spaced apart from the first scanning component along the optical axis; and
a lens system positioned between the first scanning component and the second scanning component,
wherein the lens system is configured to:
receive the optical beam from the first scanning component,
change a collimated beam size of the optical beam, and
compensate for field distortion of the optical beam.

### Claim 16 (depends on 15)

The optical device of claim 15, wherein the lens system includes a first lens to increase the collimated beam size of the optical beam and a second lens to collimate the optical beam.

### Claim 17 (depends on 15)

The optical device of claim 15, wherein the lens system includes a first lens with a first focal length and a second lens with a second focal length, and
wherein the change in the collimated beam size is based at least in part on a difference between the first focal length and the second focal length.

### Claim 18 (depends on 15)

The optical device of claim 15, wherein the first scanning component is configured to tilt around an axis to create an angular offset of the optical beam relative to the optical axis.

### Claim 19 (depends on 18)

The optical device of claim 18, wherein the second scanning component is configured to tilt around the axis.

### Claim 20 (depends on 15)

The optical device of claim 15, wherein the lens system includes at least one of a filter or a diffractive optical element positioned at a focal point of the lens system to compensate for the field distortion.