Inline Scanning Holography System Using Polarization Lens
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Solution Overview
Problem
Existing optical scanning-based object hologram acquisition devices require high-coherence light sources, complex electro-optical structures, and are vulnerable to environmental factors, leading to instability and high complexity.
Innovation Solution
An inline scanning holography system using a polarization sensitive lens to generate spherical waves of circular polarized light, a polarizer to select specific beam components, and a scanning unit to capture holograms of phosphors or transmitters with a single optical path, along with a photodetector to detect fluorescent or transmitted beams, and optional components like dichroic mirrors or spatial filters for beam management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical path difference between two separated optical paths is maintained shorter than a coherence length of coherent light to form a scanning pattern, then a high-coherence light source is required, but this increases device complexity and reduces stability
Solution Approach 1:
The patent merges two separated optical paths into a single optical path by using a polarization-sensitive lens to generate both spherical waves (reference and object waves) from one coherent light source. This eliminates the need for separate optical paths and their associated complex modulation and recombination mechanisms, thereby reducing device complexity while maintaining scanning pattern formation capability.
Solution Approach 2:
The polarization-sensitive lens serves multiple functions: it generates the reference spherical wave, generates the object spherical wave, and separates them by polarization state. This multi-functionality replaces what previously required separate optical paths, modulators, and recombination systems, thereby improving reliability by reducing the number of components that could fail or be affected by environmental factors.
2Reliability
If a bulky optical system for separating and recombining light is used, then a scanning pattern can be formed, but the system becomes vulnerable to external environmental factors such as vibration
Solution Approach 1:
The patent combines the functions of separating and recombining light into a single polarization-sensitive lens that operates within one optical path. By generating reference and object waves with orthogonal polarizations from a single light source and processing them through one optical path, the system eliminates bulky separation and recombination mechanisms, making it more compact and less vulnerable to vibrations and environmental disturbances.
3Device complexity
If a complex electrooptical structure for temporally and spatially modulating beams is used, then a scanning pattern can be formed, but the system becomes vulnerable to external environmental factors such as vibration
Solution Approach 1:
The patent replaces complex electrooptical modulation structures with a polarization-based optical system. Instead of using electrooptical modulators to temporally and spatially modulate beams in separate optical paths, the system uses a polarization-sensitive lens to create spatial modulation through spherical wave generation and a scanning mirror for temporal scanning, eliminating vulnerable electrooptical components while maintaining scanning pattern formation.
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 enables high-efficiency and high-quality optical scanning holography with improved stability and reduced complexity, robust against external environmental factors.
Implementation Method 1
a polarization sensitive lens configured to receive a linearly polarized beam and configured to generate a first spherical wave of right-handed circular polarized light having a negative focal length and a second spherical wave of left-handed circular polarized light having a positive focal length
Implementation Method 2
a scanning unit for scanning a phosphor that is a fluorescence object by using an interference beam generated between the first and second spherical waves passing through the polarizer
Implementation Method 3
a first photodetector configured to detect a fluorescent beam diverged from the phosphor
Data Source
AI summary
The present invention relates to an inline scanning holography system for a phosphor and a transmitter. According to the present invention, the inline scanning holography system includes a polarization sensitive lens that receives a linearly polarized beam and generates a first spherical wave of right-handed circular polarized light having a negative focal length and a second spherical wave of left-handed circular polarized light having a positive focal length, a polarizer that passes only a beam component in a predetermined polarization direction therethrough among components of the generated first and second spherical waves, a scanning unit for scanning a phosphor by using an interference beam generated between the first and second spherical waves passing through the polarizer, and a first photodetector that detects a fluorescent beam diverged from the phosphor. According to the present invention, a high-efficiency and high-quality optical scanning holography for a phosphor or a transmitter may be implemented.