Diffractive-Refractive Camera Lens for Thin Device Imaging
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Solution Overview
Problem
The increasing size of camera apparatuses in electronic devices conflicts with the demand for device thinness, affecting imaging performance due to the need for larger components to achieve better optical performance.
Innovation Solution
Incorporating a second lens mechanism with a diffractive-refractive lens and refractive index compensation layer to cancel chromatic aberration, reducing the number of lenses and size while maintaining imaging quality by using diffractive-refractive lenses made of glass or optical plastics, and a light filter to enhance imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of the camera apparatus is increased to achieve better optical performance, then imaging quality is improved, but the thickness of the electronic device increases
Solution Approach 1:
The patent combines refraction and diffraction functions into a single diffractive-refractive lens element. This lens simultaneously performs light refraction and diffraction, eliminating the need for separate correction lenses and reducing the overall camera module thickness while maintaining optical performance.
Solution Approach 2:
The patent employs composite lens structures combining refractive and diffractive elements with specific refractive index compensation layers. The diffractive-refractive lens integrates multiple optical functions within a single composite structure, achieving chromatic aberration correction and reduced device thickness.
2Manufacturing precision
If traditional lens structures are used to correct chromatic aberration, then imaging quality is maintained, but the number of lenses and device complexity increases
Solution Approach 1:
The patent merges chromatic aberration correction functionality into the diffractive-refractive lens structure itself, eliminating the need for separate correction lenses. The diffractive-refractive lens with refractive index compensation layer integrates multiple optical functions into a single element.
Solution Approach 2:
The diffractive-refractive lens performs multiple functions simultaneously: light focusing, chromatic aberration correction, and diffraction-based image formation. This multi-functional design reduces the total number of lenses required in the camera system.
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
The solution effectively eliminates chromatic aberration, reduces the camera apparatus size, and maintains imaging quality by using diffractive-refractive lenses and a refractive index compensation layer, allowing for thinner electronic devices without additional chromatic aberration correction lenses.
Implementation Method 1
the diffractive-refractive lens can enable the chromatic aberration generated in diffraction and the chromatic aberration generated in refraction to cancel each other out
Implementation Method 2
ambient light passing through the second lens mechanism can be refracted and diffracted by the diffractive-refractive lens
Implementation Method 3
the refractive index compensation layer is used to reduce the refractive index difference of the diffraction surface
Data Source
AI summary
This application discloses a camera apparatus, including a photosensitive chip, a first lens mechanism, a second lens mechanism, and a light filter, where the first lens mechanism is arranged between the photosensitive chip and the second lens mechanism, the second lens mechanism includes a diffractive-refractive lens and a refractive index compensation layer, the refractive index compensation layer is overlapped with the diffractive-refractive lens, the light filter is located between the photosensitive chip and the first lens mechanism, ambient light passing through the second lens mechanism can be refracted and diffracted by the diffractive-refractive lens, and the refracted and diffracted ambient light can be projected onto the photosensitive chip sequentially passing through the first lens mechanism and the light filter.