Folded Optical Path Imaging Lens for High Magnification
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Solution Overview
Problem
There is a demand for small and high optical performance imaging lenses in small electronic devices, particularly those requiring high magnification to capture images of subjects at a distance, which existing technologies have not adequately addressed.
Innovation Solution
An imaging lens system is designed with a configuration that includes a first lens with a positive refractive power and concave surfaces, a first reflecting member with concave and reflective surfaces, a second lens with negative refractive power and concave surfaces, and a second reflecting member with convex reflective surfaces, all arranged to increase optical path length without increasing the total lens system length, using aspherical lenses and a filter to block specific wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical path length is increased to achieve high magnification, then the magnification capability is improved, but the total lens system length increases
Solution Approach 1:
The patent introduces reflecting members (mirrors) to fold the optical path, changing the linear arrangement into a multi-dimensional configuration. This allows the light to traverse a longer optical path through multiple reflections while the physical footprint of the lens system remains compact, effectively resolving the contradiction between optical path length and system length.
Solution Approach 2:
The patent arranges lenses and reflecting members in a nested configuration where components are positioned within the space created by folded optical paths. The reflecting members are disposed between lenses, and subsequent lenses are positioned to utilize the reflected light paths, creating a compact nested structure that maximizes optical path length within minimal physical dimensions.
2Reliability
If the number of lenses and reflecting members is increased to improve optical performance, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The reflecting members in the patent serve multiple functions: they fold the optical path to increase magnification, they position subsequent lenses within compact space, and they maintain proper light routing throughout the system. This multi-functionality reduces the need for additional dedicated components, thereby improving optical performance while controlling system complexity.
Solution Approach 2:
The patent combines the functions of light reflection and optical path folding into single reflecting member components. The reflecting members are integrated into the lens assembly structure, with their positions and angles optimized to simultaneously achieve multiple optical objectives, thereby reducing the number of separate components needed and simplifying the overall system architecture.
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 system achieves a high magnification while maintaining a small size, allowing for efficient image capture in compact devices by optimizing focal length and reducing physical dimensions.
Implementation Method 1
a first lens having a positive refractive power
Implementation Method 2
a first reflecting member disposed adjacent to the first lens, an object-side surface of the first reflecting member is concave... the object-side surface of the first reflecting member and the image-side surface of the second reflecting member include reflective surfaces
Implementation Method 3
a second lens having a negative refractive power
Implementation Method 4
a second reflecting member disposed adjacent to the second lens or the third lens, an image-side surface of the second reflecting member having a convex shape
Data Source
AI summary
Provided is an imaging lens system including a first lens having a positive refractive power, an image-side surface of the first lens is concave, a first reflecting member disposed adjacent to the first lens, an object-side surface of the first reflecting member is concave, a second lens having a negative refractive power, an image-side surface of the second lens is concave, a third lens disposed adjacent to the image-side surface of the second lens, a second reflecting member disposed adjacent to the second lens or the third lens, an image-side surface of the second reflecting member having a convex shape, and an image sensor, wherein the first lens, the second lens and the third lens are sequentially disposed from a side of an object toward the image sensor, and wherein the object-side surface of the first reflecting member and the image-side surface of the second reflecting member include reflective surfaces.