Compact Structured Light Projector Using Integrated Metalens and DOE
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Solution Overview
Problem
Existing structured light projectors are not compact enough for integration into portable devices, limiting their application in small form factor electronics.
Innovation Solution
Integration of a metalens and a diffractive optical element (DOE) multiplier onto a light source, such as VCSELs, to create a highly compact structured light projector that efficiently generates a structured light pattern by splitting and phase-imprinting light beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional structured light projector components are used separately, then optical performance is maintained, but device size becomes too large for portable integration
Solution Approach 1:
The patent combines the metalens and DOE multiplier into a single integrated component structure that is directly coupled to the VCSEL light source. This merging of previously separate optical components into one unified assembly reduces the overall projector volume while maintaining the necessary optical functions for structured light generation
Solution Approach 2:
The integrated component structure nests multiple optical functions within a compact arrangement where the metalens and DOE multiplier are positioned in close proximity to each other and to the light source, creating a nested configuration that minimizes the projected footprint while preserving optical performance
2Volume of moving object
If multiple optical components are integrated onto the light source, then compactness is achieved, but manufacturing complexity increases
Solution Approach 1:
The integrated component structure is designed with distinct functional zones - the metalens region and the DOE multiplier region - that can be manufactured separately and then precisely aligned and bonded together. This segmentation approach allows each component to be optimized for its specific manufacturing process while still achieving the final integrated compact structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a compact structured light projector suitable for portable devices, maintaining beam properties and allowing for three-dimensional depth mapping, enhancing portability and functionality in devices like smartphones.
Implementation Method 1
a metalens, and a diffractive optical element (DOE) multiplier. Each of the metalens and the DOE multiplier is integrated onto the light source. The structured light projector is operable such that light beams produced by the light source pass through the metalens and DOE multiplier
Implementation Method 2
a metalens, and a diffractive optical element (DOE) multiplier. Each of the metalens and the DOE multiplier is integrated onto the light source. The structured light projector is operable such that light beams produced by the light source pass through the metalens and DOE multiplier
Data Source
AI summary
An apparatus that includes a structured light projector which includes a light source, a metalens, and a diffractive optical element (DOE) multiplier. Each of the metalens and the DOE multiplier is integrated onto the light source. The structured light projector is operable such that light beams produced by the light source pass through the metalens and the DOE multiplier.