Multi-stepped Sector Optical Device for Oblique Illumination
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Solution Overview
Problem
Existing illumination devices struggle to achieve uniform and appropriate light distribution for illuminating surfaces at oblique angles, such as roads, signboards, and inclined surfaces, as they often result in uneven illumination and inadequate light coverage.
Innovation Solution
The optical device features a multi-stepped sector-shaped structure with reflective curved surfaces and varying central angles, allowing light to be reflected and distributed in a controlled manner to achieve a trapezoidal light pattern, suitable for illuminating inclined surfaces by using a combination of reflective surfaces and a light source, enabling efficient and uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional illumination devices are used to illuminate surfaces at oblique angles, then the illumination coverage is limited, but the light distribution becomes uneven and inadequate
Solution Approach 1:
The illumination device is divided into multiple reflective surfaces (first reflective surface, second reflective surface, third reflective surface) with different orientations and angles. Each reflective surface segment directs light to specific regions, enabling both uniform distribution and extended coverage area on inclined surfaces
Solution Approach 2:
The reflective surfaces are designed with asymmetric configurations relative to the light source, with different inclination angles and positions. This asymmetric arrangement optimizes light reflection patterns to achieve uniform illumination on oblique surfaces while expanding the effective illumination coverage area
2Illumination intensity
If the illumination device uses a simple reflective structure, then the device complexity is low, but the light distribution cannot be controlled appropriately for oblique surfaces
Solution Approach 1:
Each reflective surface is designed with specific local properties (different inclination angles, positions, and orientations) tailored to direct light to particular target regions. The first reflective surface has a first inclination angle for one region, the second reflective surface has a second inclination angle for another region, enabling precise local light distribution control
Solution Approach 2:
The reflective surfaces utilize curved geometries rather than flat planes, allowing for more sophisticated light path control. The curved reflective surfaces can redirect light rays from the source to achieve uniform distribution patterns on inclined surfaces while maintaining a relatively compact device structure
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 ensures that the illumination device can provide a uniform and appropriate light distribution for oblique illumination, effectively covering quadrangular or linear regions with varying luminance, enhancing the brightness and uniformity of illumination on inclined surfaces.
Implementation Method 1
Light incident along the first axis passes through an opening of the first wall at an incident side and is reflected at the outer circumferential surface of the second wall at an opposite side opposite to the incident side
Data Source
AI summary
An optical device includes: a plurality of walls including at least a first wall and a second wall, wherein the plurality of walls are concentrically disposed around a first axis so as to be multi-stepped along the first axis, wherein each of the plurality of walls expands outward in a sector shape around the first axis at a predetermined central angle θ and includes an outer circumferential surface, a reflective curved surface at the outer circumferential surface, a first side end portion, and a second side end portion; a first reflective surface meeting the first side end portions of the walls; and a second reflective surface meeting the second side end portions of the walls. The first reflective surface and the second reflective surface meet each other on the first axis.