Optical Lens Assembly Aperture Size vs Thickness
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Solution Overview
Problem
Current optical zoom schemes in electronic devices, such as mobile phones, face limitations due to the constrained size of the aperture, resulting in reduced incoming light and a low diffraction limit, which hinders the achievement of higher optical zoom ranges without increasing the device thickness.
Innovation Solution
The proposed optical lens assembly includes a diaphragm, a zoom lens group, a light deflecting assembly, and a compensating lens group sequentially arranged along the optical axis. By locating the diaphragm closest to the object side and arranging the zoom lens group between the diaphragm and the light deflecting assembly, the size of the diaphragm can be increased without increasing the thickness of the device, thereby enhancing light intake and diffraction limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture size is increased to improve light intake and diffraction limit, then the optical zoom capability is improved, but the device thickness increases
Solution Approach 1:
The patent introduces a light deflecting assembly (prism) that changes the optical path direction by 90 degrees. This allows the aperture to be positioned in a different spatial dimension relative to the image sensor, enabling a larger aperture diameter without proportionally increasing the optical path length and device thickness. The light deflecting assembly redirects light from a first optical axis segment to a second optical axis segment, effectively utilizing three-dimensional space to resolve the contradiction between aperture size and device thickness.
2Measurement precision
If the aperture size is increased to improve diffraction limit, then the optical zoom capability is improved, but the device thickness increases
Solution Approach 1:
The light deflecting assembly enables the aperture to achieve a larger diameter by positioning it in a different spatial orientation. The first optical axis segment extends from the aperture to the light deflecting assembly, while the second optical axis segment extends from the light deflecting assembly to the image sensor. This dimensional reconfiguration allows the aperture diameter to be increased without proportionally increasing the overall optical path length, thereby improving the diffraction limit while controlling device thickness.
3Adaptability or versatility
If a periscope camera with 5× optical zoom is used, then the optical zoom capability is improved, but the aperture size is constrained due to thickness limitation
Solution Approach 1:
The patent employs a light deflecting assembly that redirects the optical path at 90 degrees, allowing the aperture to be positioned in a different spatial dimension. This enables the aperture area to be increased without proportionally increasing the device thickness, thereby resolving the constraint on aperture size in periscope camera designs while maintaining or enhancing optical zoom capability.
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
This configuration allows for an increased aperture size without thickening the device, resulting in improved light transmission and a higher diffraction limit, which enables greater optical zoom capabilities while maintaining device thickness.
Implementation Method 1
a light deflecting assembly... sequentially arranged along an optical axis... The optical axis includes a first optical axis segment between the diaphragm and the light deflecting assembly, and a second optical axis segment between the light deflecting assembly and the compensating lens group
Data Source
AI summary
An optical lens assembly includes: a diaphragm, a zoom lens group, a light deflecting assembly and a compensating lens group sequentially arranged along an optical axis and from an object side to an imaging plane. The optical axis comprises a first optical axis segment between the diaphragm and the light deflecting assembly, and a second optical axis segment between the light deflecting assembly and the compensating lens group. The zoom lens group is located on the first optical axis segment, and the first optical axis segment is different from the second optical axis segment. The optical lens assembly may be incorporated in a camera unit and an electronic device.