Holographic Image Sensor with Integrated Reference Light Source
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Solution Overview
Problem
Conventional holographic image sensors require complex optical structures to induce interference between object and reference beams, making them bulky and difficult to lighten or downsize.
Innovation Solution
A compact holographic image sensor design featuring a lens, a filter transmitting a predetermined wavelength band, a light receiving unit, and a reference light source that directly emits reference light to the light receiving unit, eliminating the need for separate optical structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical structures (beam splitters, mirrors) are used to induce interference between object and reference beams, then holographic image sensing is achieved, but the device becomes bulky and complex
Solution Approach 1:
The patent merges the reference light source and object light path into a single integrated optical structure. The reference light source is positioned at the focal point of the lens, allowing both reference and object lights to converge at the light receiving unit without requiring separate beam splitters or mirrors. This integration eliminates multiple optical components while maintaining the interference capability necessary for holographic sensing.
Solution Approach 2:
The patent extracts and eliminates unnecessary optical components (beam splitters, mirrors) from the conventional holographic system. By using a direct focal-point configuration where the reference light source is positioned at the lens focal point, the system removes intermediate optical elements that were previously required to create the reference beam path, thereby simplifying the overall device structure.
2Reliability
If conventional optical structures (beam splitters, mirrors) are used to induce interference between object and reference beams, then holographic image sensing is achieved, but the device weight increases
Solution Approach 1:
The patent merges the reference light source and object light path into a single integrated optical structure. The reference light source is positioned at the focal point of the lens, allowing both reference and object lights to converge at the light receiving unit without requiring separate beam splitters or mirrors. This integration eliminates multiple optical components while maintaining the interference capability necessary for holographic sensing.
Solution Approach 2:
The patent extracts and eliminates unnecessary optical components (beam splitters, mirrors) from the conventional holographic system. By using a direct focal-point configuration where the reference light source is positioned at the lens focal point, the system removes intermediate optical elements that were previously required to create the reference beam path, thereby simplifying the overall device structure.
3Reliability
If conventional optical structures (beam splitters, mirrors) are used to induce interference between object and reference beams, then holographic image sensing is achieved, but the device size increases
Solution Approach 1:
The patent merges the reference light source and object light path into a single integrated optical structure. The reference light source is positioned at the focal point of the lens, allowing both reference and object lights to converge at the light receiving unit without requiring separate beam splitters or mirrors. This integration eliminates multiple optical components while maintaining the interference capability necessary for holographic sensing.
Solution Approach 2:
The patent extracts and eliminates unnecessary optical components (beam splitters, mirrors) from the conventional holographic system. By using a direct focal-point configuration where the reference light source is positioned at the lens focal point, the system removes intermediate optical elements that were previously required to create the reference beam path, thereby simplifying the overall device structure.
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 design achieves a significantly lightened and downsized form factor while maintaining coherence for the object light, enabling efficient sensing of holographic images without the need for complex optical systems.
Implementation Method 1
a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor
Implementation Method 2
a filter transmitting a predetermined wavelength band of light of the focused object light
Implementation Method 3
a light receiving unit receiving interference light to sense a holographic image, where the light receiving unit may include a photodiode
Implementation Method 4
a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit, where the reference light source may include a nano wire transistor
Implementation Method 5
a reflective coating formed on an inner surface of the lens, where the reference light may be reflected by the reflective coating to the light receiving unit
Data Source
AI summary
According to an embodiment, a holographic image sensor comprises a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor, a filter transmitting a predetermined wavelength band of light of the focused object light, a light receiving unit receiving interference light to sense a holographic image, and a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit.