Digital Holographic Apparatus Multi-Wavelength Observation
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Solution Overview
Problem
Current digital holographic systems face limitations in observing objects from multiple directions simultaneously with a single wavelength of light, leading to blind spots and reduced observation regions.
Innovation Solution
A digital holographic apparatus that utilizes two wavelengths of light, with each wavelength being captured from a distinct observation direction, allowing interference fringes to be generated and captured by separate image capturing units, enabling the generation of reconstructed images with enhanced observation regions and reduced blind spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single wavelength of light is used for digital holographic observation, then the system structure remains simple, but the observation region is limited and blind spots occur
Solution Approach 1:
The patent combines multiple holographic observation systems with different wavelengths and observation directions into a single integrated apparatus. Multiple light sources, beam splitters, and image capturing units are merged to work simultaneously, creating a unified system that achieves extended observation coverage without proportionally increasing overall system complexity
Solution Approach 2:
The patent introduces wavelength as an additional dimension for observation beyond the traditional single spatial direction. By utilizing light sources with different wavelengths (e.g., blue light at 450nm and red light at 650nm) and configuring beam splitters at different angles, the system creates multi-dimensional observation capabilities that eliminate blind spots and expand the effective observation region
2Area of stationary object
If multiple observation directions are used with a single wavelength, then observation coverage improves, but interference patterns overlap and reduce image quality
Solution Approach 1:
The patent changes the wavelength parameter of the light sources to differentiate between multiple observation paths. By using distinct wavelengths (e.g., 450nm blue light and 650nm red light) for different observation directions, the system allows simultaneous multi-directional observation without interference pattern overlap, as each wavelength produces separate, non-overlapping interference fringes that can be independently captured and processed
Solution Approach 2:
The patent introduces wavelength-specific beam splitters and filters as intermediary components that separate and direct different wavelengths along distinct optical paths. These intermediaries ensure that light from different observation directions maintains its wavelength identity throughout the system, preventing interference pattern mixing while enabling comprehensive observation coverage
3Reliability
If multiple wavelengths and observation directions are combined, then blind spots are reduced and observation uniformity improves, but the system complexity increases
Solution Approach 1:
The patent segments the holographic observation system into independent wavelength-specific modules, where each module contains its own light source, beam splitter, and image capturing unit. This modular segmentation allows for systematic organization of complex components, making the system more manageable and maintainable while achieving uniform observation coverage through the coordinated operation of multiple segments
Solution Approach 2:
The patent designs the system with universal components that serve multiple functions across different wavelength paths. For example, a single hologram capturing device can capture interference patterns from multiple wavelengths simultaneously, and the image processing unit can handle and reconstruct images from multiple observation directions and wavelengths, reducing the need for completely separate systems for each function
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 approach allows for the enlargement of observation regions by combining image information from multiple directions, reducing blind spots and improving the uniformity and brightness of reconstructed images.
Implementation Method 1
generates a first hologram by causing first object light in a first observation direction to interfere with first reference light
Implementation Method 2
generates a second hologram by causing second object light in a second observation direction that differs from the first observation direction to interfere with second reference light
Data Source
AI summary
A digital holographic apparatus includes a first hologram generating unit that generates a first hologram by causing first object light in a first observation direction to interfere with first reference light, the first object light being generated by irradiating an observation object with light having a first wavelength, the first reference light being derived from the light having the first wavelength; a second hologram generating unit that generates a second hologram by causing second object light in a second observation direction that differs from the first observation direction to interfere with second reference light, the second object light being generated by irradiating the observation object with light having a second wavelength, the second reference light being derived from the light having the second wavelength; a first image capturing unit that captures the first hologram; and a second image capturing unit that captures the second hologram.