Diffractive optical element, TOF depth sensor, optical system, and device

A diffractive optical element and optical system technology, applied in the field of optical element design, can solve problems such as easy to be pulled out, easy to leave island structures, etc.

Pending Publication Date: 2020-09-11
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a diffractive optical element, TOF depth sensor, optical system and device for the technical problems that the traditional DOE structure is easy to be pulled out and the island structure is easy to remain when the mold is released.

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  • Diffractive optical element, TOF depth sensor, optical system, and device
  • Diffractive optical element, TOF depth sensor, optical system, and device
  • Diffractive optical element, TOF depth sensor, optical system, and device

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Embodiment Construction

[0044] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0045] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish a...

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Abstract

The invention relates to a diffractive optical element, a TOF depth sensor, an optical system and a device. According to the diffractive optical element, a plurality of island-shaped structures are formed on a substrate, and the projection of each island-shaped structure on the substrate covers at least four pixel regions, so that the microstructure of the diffractive optical element is ensured not to have an island structure, namely, the microstructure of the diffractive optical element is ensured not to have a particularly small bulge structure, and large-scale replication can be carried outthrough a nanoimprint lithography technology. The diffractive optical element inhibits the generation of isolated island-shaped structures, namely ensures the size of each island-shaped structure, and further ensures that the island-shaped structures are not easy to remain and are not easy to pull out when the island-shaped structures are demolded.

Description

technical field [0001] The present application relates to the technical field of optical element design, in particular to a diffractive optical element, a TOF depth sensor, an optical system and a device. Background technique [0002] Diffractive optics are used in many applications such as optical storage, processing, sensing and communication. Diffractive Optical Elements (DOEs) are thin phase elements that operate by means of interference and diffraction to produce arbitrary distributions of light or to aid design in optical systems. DOE designs can be applied with lasers (eg, high power lasers). Furthermore, DOE is used for wave shaping. For example, DOEs can be used as multi-spot beam splitters in beam shaping and beam profile modification. DOEs are capable of transforming a single laser beam into light patterns of various simple or complex structures. DOE presents endless possibilities in different application fields. While standard refractive optics such as mirro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18G02B27/10G03B15/02G01S17/36G01S17/89
CPCG01S17/36G01S17/89G02B5/1866G02B27/1086G03B15/02
Inventor 鞠晓山冯坤亮李宗政
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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