Projection Device for Lens Module Testing via Diffractive Optical Elements
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Solution Overview
Problem
Existing methods for testing and evaluating lens modules require manual modification of test patterns for different lenses, which is inefficient and time-consuming.
Innovation Solution
A projection device that includes a light emitting assembly, a collimating element, and a diffractive optical element, where a patterning plate with a concave groove generates an original pattern, which is then diffracted to project a precise actual pattern onto an image screen, allowing for quick and efficient generation of various test patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual modification of test patterns is used for different lens modules, then testing can be performed, but the process is inefficient and time-consuming
Solution Approach 1:
The patent uses a projection device to create optical copies of test patterns and project them onto screens, replacing manual physical modification of paper patterns. The light emitting assembly projects different test patterns (such as resolution charts, distortion patterns, and aberration patterns) optically, eliminating the need to manually create and modify physical test patterns for each lens module.
Solution Approach 2:
The patent replaces the mechanical manual process of modifying test patterns with an optical system. The light emitting assembly, collimating element, and diffractive optical element work together to automatically generate and project various test patterns, substituting the mechanical hand-drawing and physical modification process with an automated optical projection system.
2Adaptability or versatility
If multiple different test patterns are prepared manually, then different lens modules can be tested, but the complexity and cost increase
Solution Approach 1:
The projection device serves multiple functions by being able to project different types of test patterns (resolution, distortion, aberration patterns) using the same optical system. The diffractive optical element can generate various patterns by changing illumination conditions or angles, making the system universal for testing different lens modules with different requirements.
Solution Approach 2:
The system dynamically generates different test patterns by changing the illumination conditions, angles, or configuration of the optical elements rather than requiring static pre-prepared patterns. The diffractive optical element can produce different patterns dynamically by adjusting the incident light parameters, allowing the system to adapt to different testing needs without physical reconfiguration.
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 solution enables high-precision testing of lens modules with improved accuracy and reduced time and cost, as the patterning plate can be easily exchanged to generate different patterns, enhancing working efficiency and customer satisfaction.
Implementation Method 1
The collimating element 30 collimates the light from the light emitting assembly 10
Implementation Method 2
The diffractive optical element 50 diffracts the collimated light to generate and project an actual pattern onto an image screen 210
Data Source
AI summary
A device for projecting a test pattern for evaluating the image-capturing properties of a lens module includes a light emitting assembly. The light emitting assembly includes a light emitter and a patterning plate on the light emitter. The patterning plate includes a first surface facing the light emitter and a second surface opposite to the first surface. The second surface is concave and defines a patterning groove. The light from the light emitter passes through the patterning groove to form an original pattern for testing, the display of a test pattern being instantly selectable and displayable.