Five-Piece Infrared Lens for 3D Depth Induction
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Solution Overview
Problem
Current infrared receiving and induction lens groups for game machines are inadequate for 3D game depth precise induction due to poor material transparency and temperature sensitivity of plastic lenses, which affect focal length and accuracy.
Innovation Solution
A five-piece infrared single wavelength lens system with specific refractive power and aspheric surface designs, including a stop and five lens elements made of plastic or glass, optimized for wide field of view, short length, and reduced distortion, balancing curvature and thickness to maintain accuracy and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic lenses are used for low cost, then manufacturing cost is reduced, but material transparency is poor and temperature sensitivity increases causing focal length changes
Solution Approach 1:
The lens system is divided into five separate lens elements with different refractive powers (positive and negative combinations) rather than using a single plastic lens. This segmentation allows each lens to be optimized for specific optical functions while maintaining overall system reliability and reducing temperature sensitivity effects.
Solution Approach 2:
The lens system uses a composite structure combining multiple lens elements made of different materials (plastic and glass) with different refractive indices and thermal properties. This composite approach balances cost considerations with optical performance and temperature stability, as each material contributes different characteristics to the overall system.
2Measurement precision
If lens elements are increased to reduce distortion and improve accuracy, then optical performance is improved, but device complexity increases
Solution Approach 1:
The lens system is divided into five separate lens elements with different refractive powers (positive and negative combinations) rather than using a single plastic lens. This segmentation allows each lens to be optimized for specific optical functions while maintaining overall system reliability and reducing temperature sensitivity effects.
Solution Approach 2:
The lens elements incorporate aspheric surfaces instead of traditional spherical surfaces. This curvature optimization reduces optical aberrations and distortion while maintaining a compact five-element structure, achieving high measurement precision without proportionally increasing device complexity.
3Volume of moving object
If lens elements are made compact for miniaturization, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The lens system is divided into five separate lens elements with different refractive powers (positive and negative combinations) rather than using a single plastic lens. This segmentation allows each lens to be optimized for specific optical functions while maintaining overall system reliability and reducing temperature sensitivity effects.
Solution Approach 2:
The lens design incorporates specific parameter relationships (such as R5/CT3 ≥ 34.57 and TD/T12 ≥ 2.96) that optimize the compact arrangement of lens elements. These parameter constraints enable miniaturization while maintaining manufacturability by establishing clear design guidelines for curvature radii and thickness values.
4Measurement precision
If aspheric surfaces are used to reduce distortion, then optical performance is improved, but manufacturing difficulty increases
Solution Approach 1:
The lens elements incorporate aspheric surfaces instead of traditional spherical surfaces. This curvature optimization reduces optical aberrations and distortion while maintaining a compact five-element structure, achieving high measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The lens design incorporates specific parameter relationships (such as R5/CT3 ≥ 34.57 and TD/T12 ≥ 2.96) that optimize the compact arrangement of lens elements. These parameter constraints enable miniaturization while maintaining manufacturability by establishing clear design guidelines for curvature radii and thickness values.
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 lens system achieves precise 3D game depth induction with improved accuracy and reduced distortion, suitable for miniaturized electronic products, enhancing the scope of application in electronic imaging systems.
Implementation Method 1
a first lens element with a negative refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis
Data Source
AI summary
A five-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a negative refractive power, a stop, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power, and a fifth lens element with a negative refractive power, where a radius of curvature of an object-side surface of the third lens element is R5, a central thickness of the third lens element along an optical axis is CT3, and they satisfy the relation: 5<R5/CT3<35. Such a system has a wide field of view, large stop, short length and less distortion.