Miniature Microscope Diffractive Optical Element Grating Fabrication
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Solution Overview
Problem
Conventional digital holographic apparatuses suffer from image distortion due to the inability to capture high-frequency diffracted light, as the image-capturing element is restricted by the width of the beam splitter, limiting the reduction of the distance between the object and the image-capturing element.
Innovation Solution
A manufacturing method for a miniature microscope that involves emitting signal and reference lights to an optical material to form gratings, reducing the distance between the object and the image-capturing element, allowing for the capture of high-frequency light and enhancing image definition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a beam splitter is used in conventional digital holographic apparatus, then the apparatus can capture interference fringes, but the width of the beam splitter prevents further reduction of the interval between the object and the image-capturing element, limiting capture of high-frequency diffracted light
Solution Approach 1:
The patent extracts the beam splitter component from the system and replaces it with a diffractive optical element (DOE) that has been optimized for miniature applications. This extraction allows the removal of the width constraint imposed by conventional beam splitters, enabling the image-capturing element to be positioned closer to the object while still capturing high-frequency diffracted light.
Solution Approach 2:
The patent changes the optical parameters by using a diffractive optical element with specific diffraction patterns instead of a conventional beam splitter. This parameter change enables the system to maintain interference fringe capture capability while reducing the interval between the object and image-capturing element, thereby improving image definition through capture of high-frequency light components.
2Volume of moving object
If the interval between the object and the image-capturing element is reduced, then the apparatus size can be minimized, but the image-capturing element cannot capture high-frequency diffracted light without a beam splitter of sufficient width
Solution Approach 1:
The patent applies parameter changes by designing a diffractive optical element with optimized diffraction characteristics that work effectively at reduced intervals. This allows the apparatus to achieve miniaturization while maintaining the capability to capture high-frequency diffracted light, thus preserving image definition despite the reduced apparatus size.
Solution Approach 2:
The patent transitions from the conventional two-dimensional beam splitter geometry to a diffractive optical element that operates effectively in the reduced three-dimensional space. This dimensional optimization allows the system to capture high-frequency light components even when the interval between object and image-capturing element is minimized, enabling compact apparatus design without sacrificing image quality.
3Device complexity
If the image-capturing element is restricted to a finite size by the beam splitter width, then the apparatus structure is simplified, but high-frequency diffracted light cannot be captured
Solution Approach 1:
The patent extracts the beam splitter from the apparatus structure and replaces it with a diffractive optical element that integrates the beam splitting and diffraction functions into a single component. This extraction simplifies the overall structure by eliminating the need for a wide beam splitter while maintaining the capability to capture high-frequency diffracted light through the DOE's optimized diffraction patterns.
Solution Approach 2:
The diffractive optical element serves multiple functions simultaneously: it acts as a beam splitter, a diffraction grating, and an optical element that guides light to the image-capturing element. This multi-functionality reduces the overall device complexity by consolidating multiple components into one, while still enabling the capture of high-frequency diffracted light for improved image definition.
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 method enables the capture of high-frequency light, resulting in clearer and more accurate reconstructed images while reducing the size of the apparatus, making it suitable for a miniature microscope.
Implementation Method 1
forming a plurality of gratings on the optical material by interfering the signal light and the reference light
Data Source
AI summary
A manufacturing method of an optical element applied to a miniature microscope includes the steps of: emitting a signal light and a reference light to an optical material; and forming a plurality of gratings on the optical material by interfering the signal light and the reference light. A miniature microscope is also disclosed.