Refractive Lens and Diffuser Mapping for Light-Angle Measurement
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Solution Overview
Problem
Existing methods for evaluating optical characteristics of light sources and optical elements, such as LEDs, are time-consuming and expensive, and cannot measure light orientation angles beyond a certain limit.
Innovation Solution
A lens with specific incident and emit surfaces that refract light at angles θ and θ/m relative to the optical axis, combined with a diffuser panel and imaging elements, allows for the measurement of light orientation angles up to 1/m, enabling a simple structure for optical characteristic evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a goniometer is used to rotate the light source or imaging unit for measurement, then light orientation can be measured, but the measurement process becomes time-consuming and expensive
Solution Approach 1:
The patent replaces the mechanical goniometer system with an optical system consisting of a lens and diffuser panel. Instead of physically rotating components to measure light orientation at different angles, the invention uses optical refraction to map angular information to spatial positions on the diffuser panel, which can be captured simultaneously by an imaging sensor. This substitution eliminates the time-consuming sequential measurement process while maintaining measurement accuracy.
Solution Approach 2:
The invention transforms the one-dimensional angular measurement problem into a two-dimensional spatial mapping problem. By using the lens to refract light at different angles onto different positions of the diffuser panel, the system captures angular information across the entire field of view simultaneously in a single image, rather than measuring each angle sequentially through mechanical rotation.
2Measurement precision
If a goniometer is used for measurement, then light orientation can be evaluated, but the equipment cost becomes very high
Solution Approach 1:
The patent replaces the expensive mechanical goniometer with a simpler optical system comprising a lens and diffuser panel. This substitution dramatically reduces equipment cost while maintaining the capability to measure light orientation characteristics. The imaging sensor captures all angular information simultaneously, eliminating the need for expensive precision mechanical rotation stages.
Solution Approach 2:
The invention creates an optical map or copy of the light orientation distribution by refracting light through the lens onto the diffuser panel. This optical copying process allows the entire angular distribution to be captured in a single static image, replacing the need for expensive dynamic mechanical measurement systems.
3Loss of time
If light is made to collide with a visualization plate for observation, then measurement time is reduced, but light with large orientation angles cannot be measured
Solution Approach 1:
The patent changes the optical parameters of the system by using a lens with specific refractive properties. The lens is designed to refract light at different incident angles onto different positions of the diffuser panel, effectively expanding the measurable angle range. By adjusting the lens parameters and its positioning relative to the light source and diffuser panel, the system can capture a broader range of light orientation angles simultaneously.
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 and optical system device can efficiently measure optical characteristics with a reduced light orientation angle, providing accurate and rapid data acquisition.
Implementation Method 1
the incident surface and the emit surface are formed so as to emit incident light to the incident surface from a first position at an irradiation angle θ relative to the optical axis from the emit surface at an emit angle θ/m (where m>1) relative to the optical axis by refraction at the incident surface and at the emit surface
Implementation Method 2
a diffuser panel that diffuses the light emitted from the lens
Data Source
AI summary
A lens and an optical system device are provided which can measure optical characteristics of a light source or an optical element with a simple structure. A lens 1 has an optical axis, and includes an incident surface F and an emit surface B. The incident surface F and the emit surface B are formed so as to emit incident light to the incident surface F from a first position O at an irradiation angle θ relative to the optical axis from the emit surface B at an emit angle θ/m (where m>1) relative to the optical axis by refraction at the incident surface F and at the emit surface B, and formed in such a way that apparent positions of lights emitted from the emit surface B all begin from a second position P. Moreover, an optical system device includes the lens 1 and a diffuser panel that diffuses emitted light from the lens 1.