Uniformizing Irradiation Optical System for Ultrawide Projection
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Solution Overview
Problem
Existing interactive detection technologies face challenges in achieving uniform light distribution for wide-angle projection, leading to complex manufacturing processes and reduced adjustment flexibility, especially when applied to ultrawide-angle projectors.
Innovation Solution
An irradiation optical system comprising a uniformizing section and an irradiation lens section, utilizing a first and second cylindrical lens with negative refractive power, to bring the in-plane light distribution close to uniformity and diffuse light in a predetermined direction, thereby forming a substantially uniform light film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional irradiation optical systems (rod lens or Powell lens) are used for ultrawide-angle projection, then the system structure is simple, but the light distribution uniformity deteriorates and manufacturing complexity increases
Solution Approach 1:
The irradiation optical system is divided into two independent sections: a uniformizing section (using cylindrical lens array or light guide plate) that creates uniform in-plane light distribution, and an irradiation lens section (using negative cylindrical lens) that forms the light film. This segmentation allows each section to optimize its function independently, achieving both manufacturing simplicity and light distribution uniformity.
Solution Approach 2:
The patent combines multiple optical elements (cylindrical lens array or light guide plate with negative cylindrical lens) into a coordinated system where the uniformizing section and irradiation lens section work together. This merging achieves uniform light distribution while maintaining manageable manufacturing complexity through modular design.
2Adaptability or versatility
If conventional irradiation optical systems are used, then the number of components is small, but the adjustment flexibility of light quantity in plane is reduced
Solution Approach 1:
By separating the optical system into uniformizing and irradiation sections, the patent enables independent adjustment of light quantity in the uniformizing section (via cylindrical lens array orientation or light guide plate design) without affecting the light film formation function of the irradiation lens section, thus providing adjustment flexibility while maintaining reasonable component count.
Solution Approach 2:
The uniformizing section can be designed with adjustable parameters (such as the orientation of cylindrical lenses in the array or the dimensions of the light guide plate) that allow dynamic adjustment of light quantity distribution in the plane, providing adaptability for different projection requirements.
3Illumination intensity
If ultrashort-focus lens is used for ultrawide-angle projection, then the projection angle is widened, but the light distribution uniformity deteriorates
Solution Approach 1:
The patent separates the functions of wide-angle projection (ultrashort-focus lens) and light distribution uniformization (uniformizing section) into independent modules. This allows the ultrashort-focus lens to achieve ultrawide-angle projection while the uniformizing section independently ensures uniform light distribution, resolving the contradiction between projection angle and uniformity.
4Reliability
If conventional irradiation optical systems are used, then the system is simple, but the detection accuracy deteriorates due to non-uniform light distribution
Solution Approach 1:
By dividing the system into uniformizing and irradiation sections, the patent achieves uniform light distribution that improves detection accuracy (reducing false detections) while keeping each section relatively simple in structure, thus improving reliability without excessive complexity.
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 allows for flexible design of the irradiation plane, reduces the number of components and adjustment processes, and maintains a uniform light distribution even in ultrashort-focus projectors, enhancing accuracy and reducing the risk of false detection.
Implementation Method 1
The uniformizing section brings in-plane distribution of light emitted from a light source, close to uniform in-plane distribution
Implementation Method 2
The irradiation lens section includes, in order from the light source, a first cylindrical lens and a second cylindrical lens each having negative refractive power in the predetermined direction
Data Source
AI summary
An irradiation optical system includes a uniformizing section and an irradiation lens section. The uniformizing section brings in-plane distribution of light emitted from a light source, close to uniform in-plane distribution. The irradiation lens section diffuses the light in a predetermined direction. The in-plane distribution of the light is brought close to the uniform in-plane distribution by the uniformizing section. The irradiation lens section includes, in order from the light source, a first cylindrical lens and a second cylindrical lens each having negative refractive power in the predetermined direction.