Lensless Near-Field Microscopy for Pixel-Limited Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical microscopy is limited by the diffraction limit, which restricts resolution to several hundred nanometers, making it difficult to achieve high-resolution imaging of specimens without the use of expensive and complex optical elements or computational corrections.
Innovation Solution
An imaging device with a high-resolution photosensitive array and supporting circuitry that captures images without lenses or computational corrections, achieving pixel-limited resolution by bringing specimens close to the photosensitive surface, thereby overcoming the diffraction limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical microscopy is used, then imaging can be performed with standard equipment, but resolution is limited to several hundred nanometers by the diffraction limit
Solution Approach 1:
The patent extracts and removes the lens component from the optical system entirely. By placing the photosensitive array directly against the specimen, the system eliminates the intermediate optical elements (lenses, mirrors, etc.) that cause diffraction and complexity, achieving super-resolution imaging through direct near-field detection
Solution Approach 2:
The patent introduces a photosensitive array as a direct intermediary between the light source and specimen. This array operates in the near-field region without requiring traditional optical lenses, allowing resolution to be determined by pixel size rather than diffraction limits
2Measurement precision
If high-resolution imaging is achieved using standard optical microscopy, then expensive and complex optical elements or computational corrections are required, but this increases device complexity and cost
Solution Approach 1:
The patent removes expensive and complex optical elements (such as high-NA lenses, confocal apertures, and specialized illumination systems) from the imaging system. By operating in direct contact mode with a photosensitive array, it achieves high resolution without these costly components
Solution Approach 2:
The system uses the pixel array itself to define the resolution limit through its physical pixel size, eliminating the need for computational corrections or complex optical elements. The imaging system serves itself by using simple geometric constraints rather than expensive auxiliary systems
3Measurement precision
If the photosensitive array is positioned close to the specimen, then pixel-limited resolution is achieved without diffraction limits, but the working distance is reduced
Solution Approach 1:
The patent transitions from far-field optical imaging to near-field imaging by changing the spatial dimension and scale of operation. By operating at distances comparable to pixel dimensions rather than optical focal lengths, the system achieves resolution determined by pixel size rather than diffraction
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 imaging device achieves high-resolution images comparable to standard lens-based optical microscopes without the need for lenses or computational corrections, allowing for imaging of specimens at resolutions limited by the pixel size, rather than the diffraction limit.
Implementation Method 1
an imaging device has a photosensitive array of pixels
Data Source
AI summary
Among other things, an imaging device has a photosensitive array of pixels, and a surface associated with the array is configured to receive a specimen with at least a part of the specimen at a distance from the surface equivalent to less than about half of an average width of the pixels.