# US 10,310,252 B1 · Optical wheel

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- Number: US 10,310,252 B1
- Document ID: US10310252B1
- Status: Granted
- Kind: B1
- Application number: 15/810,043
- Filed: 2017-11-11
- Published: 2019-05-16
- Granted: 2019-06-04
- Earliest claimed: 2017-11-11
- Assignees: Taiwan Color Optics, Inc.
- Applicants: Taiwan color optics, Inc.
- Inventors: Chih-Feng Wang; Yung-Peng Chang
- Web page: https://patentgrep.com/patent/US10310252B1

## CPC

- G02B 26/008: {in the form of devices for effecting sequential colour changes, e.g. colour wheels}
- G02B 5/0294: {adapted to provide an additional optical effect, e.g. anti-reflection or filter}
- G02B 27/0905: {Dividing and/or superposing multiple light beams}
- G02B 27/48: Laser speckle optics
- G03B 21/2033: {LED or laser light sources}
- G03B 21/208: {Homogenising, shaping of the illumination light}
- G03B 33/10: Simultaneous recording or projection (G03B33/02, G03B33/04 G03B33/06 take precedence)
- H04N 9/3114: {by using a sequential colour filter producing one colour at a time}
- H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The instant disclosure provides an optical wheel including a rotary light-transmittable substrate, an optical microstructure layer and an optical coating layer. The rotary light-transmittable substrate has a first surface and a second surface opposite to the first surface, and rotates around a central axis. The optical microstructure is disposed on the first surface or the second surface. The optical coating layer is disposed on the optical microstructure. At least a laser incident light beam is projected onto the first surface or the second surface of the rotary light-transmittable substrate for forming a laser emission light beam emitted from the second surface.

## Claims

### Claim 1

An optical wheel, comprising:
a rotary light-transmittable substrate having a first surface and a second surface opposite to the first surface;
an optical microstructure layer disposed on the first surface or the second surface, wherein the optical microstructure layer and the rotary light-transmittable substrate are made of the same material and a roughness of the optical microstructure layer ranges from 0.01 to 1 μm; and
an optical coating layer disposed on the optical microstructure layer;
wherein at least one laser incident light beam is projected onto the first surface or the second surface of the rotary light-transmittable substrate and passes through the optical microstructure layer for forming at least one laser emission light beam emitted from the second surface.

### Claim 2 (depends on 1)

The optical wheel according to claim 1, wherein the optical wheel comprises a plurality of laser incident light beams projected onto the first surface or the second surface of the rotary light-transmittable substrate for forming a plurality of laser emission light beams emitted from the second surface.

### Claim 3 (depends on 2)

The optical wheel according to claim 2, wherein the plurality of laser incident light beams include a laser incident light beam having a wavelength ranging from 450 to 495 nanometers, a laser incident light beam having a wavelength ranging from 495 to 570 nanometers and a laser incident light beam having a wavelength ranging from 620 to 750 nanometers.

### Claim 4 (depends on 2)

The optical wheel according to claim 2, wherein all of the plurality of laser incident light beams are projected onto the first surface of the rotary light-transmittable substrate for forming the plurality of laser emission light beams emitted from the second surface.

### Claim 5 (depends on 2)

The optical wheel according to claim 2, wherein all of the plurality of laser incident light beams are projected onto the second surface of the rotary light-transmittable substrate for forming the plurality of laser emission light beams emitted from the second surface.

### Claim 6 (depends on 2)

The optical wheel according to claim 2, wherein one of the laser incident light beams is projected onto the first surface of the rotary light-transmittable substrate for forming one of the plurality of laser emission light beams emitted from the second surface, and another one of the laser incident light beams is projected onto the second surface of the rotary light-transmittable substrate for forming another one of the plurality of laser emission light beams emitted from the second surface.

### Claim 7 (depends on 1)

The optical wheel according to claim 1, wherein the optical microstructure layer is disposed on the first surface and the second surface.