Four-Piece Infrared Lens System 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, leading to inaccurate focal length changes and inability to meet 3D game requirements.
Innovation Solution
A four-piece infrared single wavelength lens system with specific refractive power distributions and aspheric surfaces, comprising a stop, first, second, third, and fourth lens elements, optimized for wide field of view, low distortion, and reduced sensitivity, using plastic or glass materials to maintain miniaturization and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic material is used for lens group to reduce cost, then manufacturing cost is reduced, but material transparency deteriorates and temperature sensitivity increases
Solution Approach 1:
The lens system is divided into multiple lens elements (first through fourth lens elements) with different refractive powers and surface configurations. This segmentation allows each element to contribute differently to the overall optical performance, compensating for the limitations of plastic material through collective optical design rather than relying on a single perfect lens element.
Solution Approach 2:
The patent employs a composite lens system where multiple lens elements with different optical properties are combined. By integrating elements with positive and negative refractive powers, aspheric and spherical surfaces, the system creates a composite optical structure that achieves superior transparency and temperature stability compared to individual plastic lenses.
2Ease of manufacture
If plastic lens group is used to reduce cost, then manufacturing cost is reduced, but focal length stability deteriorates due to temperature sensitivity
Solution Approach 1:
The patent utilizes aspheric surface parameters and specific refractive power distributions across multiple lens elements to compensate for temperature-induced focal length changes. By carefully designing the aspheric coefficients and refractive powers, the system maintains focal length stability despite temperature variations affecting the plastic material.
Solution Approach 2:
The patent converts the temperature sensitivity of plastic material into a manageable parameter by designing lens elements whose combined optical path compensates for thermal expansion. The aspheric surfaces and mixed refractive powers create an optical system where thermal effects on individual elements cancel out, transforming the harmful temperature sensitivity into a balanced system response.
3Device complexity
If conventional 2D plane lens group is used, then device simplicity is maintained, but depth induction capability deteriorates for 3D games
Solution Approach 1:
The patent transitions from conventional 2D plane lens design to a more sophisticated multi-element configuration with aspheric surfaces extending in multiple dimensions. The aspheric profiles and varied refractive powers create optical paths that capture depth information in three-dimensional space, enabling accurate depth induction for 3D gaming applications while maintaining a compact form factor.
4Area of moving object
If wide-angle lens group is used to broaden game induction scope, then field of view is expanded, but distortion increases
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements to correct the barrel distortion inherent in wide-angle designs. The aspheric profiles carefully control the curvature of light rays across the wide field of view, maintaining straight lines and geometric accuracy while preserving the expanded angular coverage needed for broad game induction scope.
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 wide field of view with reduced distortion and sensitivity, enhancing image quality and depth induction accuracy, suitable for 3D game applications while maintaining miniaturization and cost-effectiveness.
Implementation Method 1
a first lens element with a refractive power having an object-side surface being convex near an optical axis
Data Source
AI summary
A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a refractive power having an object-side surface being convex near an optical axis, a second lens element with a positive refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, large stop, short length and less distortion.