Wavelength-Segmented Autofocus for Broad-Spectrum Image Sharpness
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Solution Overview
Problem
Autofocus systems struggle to generate sharp images across a broad spectral range, particularly in applications involving high magnification and non-visible light spectra, leading to time-consuming manual adjustments and insufficient focusing.
Innovation Solution
An autofocus system that utilizes multiple sensors to capture images in different wavelength ranges, determining separate focus settings for each range, and adjusts optical elements accordingly to achieve sharp imaging across a broad spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single focus setting is used for the entire spectral range, then the device complexity is reduced, but the manufacturing precision and image sharpness deteriorate across different wavelengths
Solution Approach 1:
The patent segments the spectral range into multiple wavelength ranges (e.g., first wavelength range and second wavelength range) and assigns separate focus settings to each segment. This allows the system to optimize focus for each wavelength range independently, resolving the chromatic aberration issue while maintaining manageable device complexity through structured segmentation.
Solution Approach 2:
The patent implements dynamic focus adjustment by allowing the focus setting to change based on the detected wavelength range. The system automatically adjusts the focus position according to the observed light's wavelength, enabling adaptability across different spectral conditions without requiring manual intervention for each wavelength change.
2Manufacturing precision
If manual readjustment of focus is applied for fluorescence light, then the image sharpness for specific wavelengths can be improved, but the productivity and time efficiency deteriorate
Solution Approach 1:
The patent incorporates a feedback mechanism where the wavelength of observed light is detected and used to automatically determine the appropriate focus setting. This closed-loop system eliminates the need for manual focus adjustment by continuously monitoring the wavelength and adjusting the focus position accordingly, thereby maintaining image sharpness while significantly improving productivity.
Solution Approach 2:
The system performs self-adjustment of focus based on the detected wavelength range without requiring manual intervention. The autofocus system automatically selects and applies the appropriate focus setting from multiple available settings, enabling the system to serve itself in optimizing image quality across different spectral conditions.
3Ease of operation
If autofocus systems use white light for focusing, then the ease of operation is improved, but the measurement precision deteriorates for non-visible spectra such as ultraviolet or infrared fluorescence
Solution Approach 1:
The patent applies local quality by using different detection approaches for different wavelength ranges. Instead of using a single white light detection method for all wavelengths, the system employs detection mechanisms optimized for specific wavelength ranges (e.g., visible, ultraviolet, infrared), thereby improving measurement precision for each spectral region while maintaining ease of operation through automated selection.
Solution Approach 2:
The system changes the detection parameters based on the wavelength range being observed. By adjusting the detection method and focus settings according to the specific wavelength range (visible, UV, IR), the system maintains high measurement precision across different spectra while preserving ease of operation through automatic parameter adaptation.
4Manufacturing precision
If multiple focus settings are used for different wavelength ranges, then the manufacturing precision and image sharpness across the spectrum are improved, but the device complexity increases
Solution Approach 1:
The patent segments both the spectral range and the focus settings into corresponding groups. Each wavelength range has its dedicated focus setting, creating a structured segmentation that improves image sharpness for each segment while organizing the complexity in a manageable way. This segmented approach allows the system to handle multiple wavelengths without overwhelming complexity.
Solution Approach 2:
The patent creates a universal autofocus system that handles multiple wavelength ranges through a unified control mechanism. The same autofocus device performs multiple functions by automatically selecting appropriate focus settings based on the detected wavelength, thereby achieving broad spectral coverage without proportionally increasing device 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
Enables fast, automatic, and precise focusing on objects emitting light across a broad spectrum, including visible and fluorescence light, by considering wavelength-dependent optical characteristics.
Implementation Method 1
Due to dispersion, autofocus systems often reach limits in such applications using high magnifications or light indicating a broad spectral range
Data Source
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AI summary
An embodiment of an autofocus system (100, 400) is configured to receive a first signal (102a, 402a) corresponding to a first wavelength range and to receive a second signal (102b, 402b) corresponding to a second wavelength range. The autofocus system (100, 400) is further configured to determine an output signal (106, 406) comprising a focus setting information using the first signal (102a, 402a) and the second signal (102b, 402b).