US-12625362-B2 - Micro-optics system for non-rotational scanning comprising a plurality of micro-optical elements having different inclination patterns

US12625362B2US 12625362 B2US12625362 B2US 12625362B2US-12625362-B2

Abstract

A micro-optics system for non-rotational scanning includes a plurality of micro-optical elements having different inclination patterns. The different inclination patterns are implemented such that a plurality of light rays incident from a light source are increasingly refracted by 1 degree in an outward direction from a center of the plurality of micro-optical elements.

Inventors

Yong Woo Kim
Jun Yuk LEE

Assignees

OPTOELEC CO., LTD

Dates

Publication Date: 20260512
Application Date: 20210406
Priority Date: 20200206

Claims (13)

1 . A micro-optics system for non-rotational scanning, the micro-optics system comprising a plurality of micro-optical elements having different inclination patterns, wherein the different inclination patterns are implemented such that a plurality of light rays incident from a light source are increasingly refracted by 1 degree in an outward direction from a center of the plurality of micro-optical elements, wherein the plurality of micro-optical elements comprise a first micro-optical element, a second micro-optical element, and a third micro-optical element, the first micro-optical element comprises: a first surface which is flat; and a second surface which includes a first region, a second region, and a third region arranged with respect to the center, and each of the first region, the second region, and the third region includes a first inclination pattern implemented such that the plurality of light rays are increasingly refracted in a range of 1 to 15 degrees from the center.
2 . The micro-optics system of claim 1 , wherein the second micro-optical element is stacked on the first micro-optical element, the third micro-optical element is stacked on the second micro-optical element, a length of the first micro-optical element is shorter than a length of the second micro-optical element, and the length of the second micro-optical element is shorter than a length of the third micro-optical element.
3 . The micro-optics system of claim 1 , wherein the first region, the second region, and the third region include a gap between the first region and the second region and a gap between the second region and the third region, and the gap between the second region and the third region is greater than the gap between the first region and the second region.
4 . The micro-optics system of claim 1 , wherein the second micro-optical element comprises: a third surface including a fourth region, a fifth region, and a sixth region that face the first region, the second region, and the third region, respectively; and a fourth surface including a seventh region, an eighth region, and a ninth region that correspond to the fourth region, the fifth region, and the sixth region, respectively, the fourth region is flat, and each of the fifth region and the sixth region includes a second inclination pattern implemented such that the plurality of light rays refracted through the second region and the third region are refracted in a range of 16 to 30 degrees from the center.
5 . The micro-optics system of claim 1 , wherein the third micro-optical element comprises: a fifth surface including a tenth region, an eleventh region, and a twelfth region that face the seventh region, the eighth region, and the ninth region, respectively; and a sixth surface including a thirteenth region, a fourteenth region, and fifteenth region that correspond to the tenth region, the eleventh region, and the twelfth region, respectively, the seventh region is flat, and the twelfth region includes a third inclination pattern implemented such that the plurality of light rays refracted through the sixth region are refracted in a range of 31 to 45 degrees from the center.
6 . The micro-optics system of claim 1 , wherein the center of the plurality of micro-optical elements includes no inclination pattern to prevent light rays incident from the center among the plurality of light rays from being refracted.
7 . A micro-optics system for non-rotational scanning, the micro-optics system comprising a plurality of micro-optical elements having different inclination patterns, wherein the plurality of micro-optical elements are classified into three zones, a first zone among the three zones includes a first micro-optical element that is included in the plurality of micro-optical elements and that includes a first inclination pattern such that a plurality of light rays incident from a light source are refracted in a range of 1 to 15 degrees from a center, a second zone among the three zones includes a second micro-optical element that is included in the plurality of micro-optical elements and that includes a second inclination pattern such that the plurality of incident light rays are refracted in a range of 16 to 30 degrees from the center, and a third zone among the three zones includes a third micro-optical element that is included in the plurality of micro-optical elements and that includes a third inclination pattern such that the plurality of incident light rays are refracted in a range of 31 to 45 degrees from the center.
8 . The micro-optics system of claim 7 , wherein the first inclination pattern is implemented to face the second inclination pattern, and the third inclination pattern does not face the second inclination pattern but is implemented to correspond to the second inclination pattern.
9 . The micro-optics system of claim 7 , wherein the first inclination pattern includes a plurality of first inclined planes and a plurality of second inclined planes, and the angle of inclination of the plurality of first inclined planes increases in a direction away from the center.
10 . The micro-optics system of claim 7 , wherein the second inclination pattern includes a plurality of third inclined planes and a plurality of fourth inclined planes, and the angle of inclination of the plurality of third inclined planes increases in a direction away from the center.
11 . The micro-optics system of claim 7 , wherein the third inclination pattern includes a plurality of fifth inclined planes and a plurality of sixth inclined planes, and the angle of inclination of the plurality of fifth inclined planes increases in a direction away from the center.
12 . The micro-optics system of claim 7 , wherein light rays incident from the center are not refracted.
13 . A micro-optics system for non-rotational scanning, the micro-optics system comprising: a first micro-optical element including a first surface and a second surface; a second micro-optical element including a third surface and a fourth surface; and a third micro-optical element including a fifth surface and a sixth surface, wherein the first surface is flat, the second surface includes a first region, a second region, and a third region arranged with respect to a center, each of the first region, the second region, and the third region includes a first inclination pattern implemented such that a plurality of light rays incident from a light source are refracted in a range of 1 to 15 degrees in an outward direction from the center, light incident from the center is not refracted, the third surface includes a fourth region, a fifth region, and a sixth region that face the first region, the second region, and the third region, respectively, the fourth region is flat, each of the fifth region and the sixth region includes a second inclination pattern implemented such that the light refracted through the second region and the third region is refracted in a range of 16 to 30 degrees, the fifth surface includes a seventh region, an eighth region, and a ninth region that correspond to the fourth region, the fifth region, and the sixth region, respectively, the seventh region is flat, the eighth region and the ninth region include an inclination pattern, and the fifth surface includes a third inclination pattern implemented such that the light refracted through the sixth region is refracted in a range of 31 to 45 degrees.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0014385, filed on Feb. 6, 2020, and Korean Patent Application No. 10-2020-0027492, filed Mar. 5, 2020, the disclosures of which are incorporated herein by reference in their entirety. BACKGROUND 1. Field of the Invention The present invention relates to a micro-optics system for non-rotational scanning, and more particularly, to a micro-optics system for non-rotational scanning that enables scanning without rotation. 2. Discussion of Related Art Three-dimensional (3D) scanning is a technology for scanning and detecting objects using laser light. 3D scanning can be used in various fields such as autonomous vehicles, medical devices, and inspection equipment. A conventional 3D scanning device emits laser light by rotating a mirror of the 3D scanning device and scans and detects an object according to received laser light. When using a conventional 3D scanning device for a long time, optical alignment variation may occur due to rotation. This leads to measurement errors. Durability issues may occur due to rotation. In addition, a conventional 3D scanning device has a complicated structure, and thus the manufacturing cost is high. SUMMARY OF THE INVENTION The present invention is directed to providing a micro-optics system for non-rotational scanning in which scanning can be performed with no rotation. A micro-optics system for non-rotational scanning according to an embodiment of the present invention comprises a plurality of micro-optical elements having different inclination patterns, wherein the different inclination patterns are implemented such that a plurality of light rays incident from a light source are increasingly refracted by 1 degree in an outward direction from a center of the plurality of micro-optical elements. The plurality of micro-optical elements comprise a first micro-optical element, a second micro-optical element, and a third micro-optical element. The first micro-optical element comprises a first surface which is flat, and a second surface which includes a first region, a second region, and a third region arranged with respect to the center, and each of the first region, the second region, and the third region includes a first inclination pattern implemented such that the plurality of light rays are increasingly refracted in a range of 1 to 15 degrees from the center. The second micro-optical element is stacked on the first micro-optical element, the third micro-optical element is stacked on the second micro-optical element, a length of the first micro-optical element is shorter than a length of the second micro-optical element, and the length of the second micro-optical element is shorter than a length of the third micro-optical element. The first region, the second region, and the third region include a gap between the first region and the second region and a gap between the second region and the third region, and the gap between the second region and the third region is greater than the gap between the first region and the second region. The second micro-optical element comprises a third surface including a fourth region, a fifth region, and a sixth region that face the first region, the second region, and the third region, respectively, and a fourth surface including a seventh region, an eighth region, and a ninth region that correspond to the fourth region, the fifth region, and the sixth region, respectively, the fourth region is flat, and each of the fifth region and the sixth region includes a second inclination pattern implemented such that the plurality of light rays refracted through the second region and the third region are refracted in a range of 16 to 30 degrees from the center. The third micro-optical element comprises a fifth surface including a tenth region, an eleventh region, and a twelfth region that face the seventh region, the eighth region, and the ninth region, respectively, and a sixth surface including a thirteenth region, a fourteenth region, and fifteenth region that correspond to the tenth region, the eleventh region, and the twelfth region, respectively, the seventh region is flat, and the twelfth region includes a third inclination pattern implemented such that the plurality of light rays refracted through the sixth region are refracted in a range of 31 to 45 degrees from the center. The center of the plurality of micro-optical elements includes no inclination pattern to prevent light rays incident from the center among the plurality of light rays from being refracted. The micro-optics system according to an embodiment of the present invention comprises a plurality of micro-optical elements having different inclination patterns. The plurality of micro-optical elements are classified into three zones, a first zone among the three zones includes a first micro-optical element that is included in the plurality of micro-optical el