Optical Lens with Dual-Angle Total Reflection for Stray-Light Control
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Solution Overview
Problem
Existing optical lenses face an issue of increased size due to the configuration of light reflection and exit paths, which can lead to uneven illuminance levels and stray light, affecting the quality of emitted light.
Innovation Solution
The optical lens design includes separate incident portions for narrow-angle and wide-angle light, with total reflecting portions to guide and reflect light efficiently, reducing the size of the lens and minimizing stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If light exits through a peripheral portion located outward of the opposing region, then light can exit without opposing the light source, but the optical lens size increases
Solution Approach 1:
The optical lens is segmented into distinct functional regions: a first light incident portion for narrow-angle light, a second light incident portion for wide-angle light, a first total reflecting portion, and a second total reflecting portion. This segmentation allows different light paths to be managed separately, enabling compact design while controlling stray light.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of light paths within the lens. By configuring the first and second total reflecting portions at different positions and orientations, the design guides light through multiple reflections within a compact volume, avoiding the need for light to exit through peripheral portions that would increase lens size.
2Productivity
If separate incident portions are used for narrow-angle and wide-angle light, then light can be guided more efficiently, but device complexity increases
Solution Approach 1:
The optical lens is designed as a multi-functional integrated component where a single lens structure performs multiple functions: it receives both narrow-angle and wide-angle light through different incident portions, guides both types of light through total internal reflection, and outputs the combined light. This universal design improves light guidance efficiency without proportionally increasing device complexity.
Solution Approach 2:
The patent merges the handling of narrow-angle and wide-angle light paths within a single optical lens structure. By combining the first and second light incident portions, first and second total reflecting portions, and light exiting portion into one integrated component, the design achieves efficient light guidance while avoiding the complexity of separate optical systems for different light angles.
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 design achieves uniform light emission with reduced stray light, improving the quality of the emitted light and preventing projection of the light source pattern, while maintaining efficient light use.
Implementation Method 1
a first total reflecting portion configured to totally reflect the light incident on the first light incident portion
Implementation Method 2
a second total reflecting portion configured to totally reflect the light incident on the second light incident portion
Data Source
AI summary
An optical lens includes a first light incident portion where a narrow-angle light from a light source is incident, a second light incident portion where a wide-angle light from the light source is incident, a first total reflecting portion that totally reflects incident light from the first light incident portion, a second total reflecting portion that totally reflects incident light from the second light incident portion, and a light exiting portion that emits light totally reflected at the second total reflecting portion. The second total reflecting portion allows light totally reflected at the first total reflecting portion to pass through.