Hologram Recording System Using Polarizer Array
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Solution Overview
Problem
Current hologram recording systems rely on lasers for interference patterns, limiting their ability to record under non-laser light conditions and restricting their resolution and dynamic capabilities.
Innovation Solution
A hologram recording system utilizing a polarizer array, imaging optics, and a high-resolution general image sensor to acquire self-interference patterns, allowing for real-time high-resolution hologram recording under various light conditions, including fluorescent, bulb, LED, or natural light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a polarization image sensor is used to record self-interference patterns, then hologram recording under non-laser light conditions is enabled, but the resolution is limited by the sensor specifications
Solution Approach 1:
The image sensor is divided into multiple pixel groups, where each group corresponds to a specific polarization direction. A polarizer array is placed in front of the sensor, with each polarizer oriented at a different angle (0°, 45°, 90°, 135°). This segmentation allows the system to capture interference patterns for different polarization states simultaneously, enabling hologram recording under various light sources while maintaining high resolution through the use of a high-resolution general image sensor.
2Measurement precision
If a high-resolution general image sensor is used, then recording resolution is improved, but the system cannot acquire phase-shifted interference patterns for each pixel
Solution Approach 1:
A polarizer array is introduced as an intermediary component between the light source and the high-resolution image sensor. Each polarizer in the array imparts a specific polarization state to the incident light, which then interferes with the reference beam to produce phase-shifted interference patterns. This intermediary enables the high-resolution sensor to capture phase information by converting polarization states into intensity variations that the sensor can detect.
3Reliability
If conventional holography uses lasers for interference patterns, then stable interference is achieved, but the system cannot record under natural light conditions
Solution Approach 1:
The system applies local quality by using polarization-dependent interference. Instead of requiring coherent laser light throughout the entire system, the invention uses a polarizer array to create localized polarization states at different pixel groups. Each polarizer converts the incident natural light into a specific polarization state, enabling stable interference patterns to be formed locally at each pixel group even when the overall light source is incoherent natural light.
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 the recording of both static and dynamic objects in high-resolution holograms in real-time, overcoming the limitations of traditional systems by using non-laser light sources and maximizing the resolution of the image sensor.
Implementation Method 1
a polarizer array including a plurality of polarizers
Implementation Method 2
acquiring an interference pattern formed by self-interference of incident light from a target object
Implementation Method 3
an imaging optics disposed between the polarizer array and the image sensor, wherein the imaging optics optically corresponds each of the plurality of polarizers to each of the plurality of pixels
Implementation Method 4
an image sensor including a plurality of pixels
Data Source
AI summary
The present disclosure relates to a hologram recording system that has an optical structure capable of replacing a polarization image sensor, thereby acquiring high-resolution holograms in real time by utilizing a high-resolution general image sensor. The hologram recording system for acquiring an interference pattern formed by self-interference of incident light from a target object is disclosed. The hologram recording system comprises a polarizer array including a plurality of polarizers, an image sensor including a plurality of pixels and an imaging optics disposed between the polarizer array and the image sensor. The imaging optics optically corresponds each of the plurality of polarizers to each of the plurality of pixels.