Flex-Spectrum Optical Detector for Compact High-Resolution Sensing
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Solution Overview
Problem
Conventional spectroscopy systems face challenges in achieving high sensitivity and high resolution across a full spectrum due to the inefficient use of physical space and power loss when splitting the spectrum into multiple beams, leading to wasted power and suboptimal detection efficiency.
Innovation Solution
The implementation of a flex-spectrum optical detector that separates a full optical signal into multiple spectral bands with different spectral ranges, spatially or angularly, and rearranges these bands before dispersion to maximize power usage and detector efficiency, allowing for higher resolution and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the full spectrum is dispersed as a continuous elongated beam in a linear sequence, then the spectral coverage is complete, but the detector area required becomes excessively large and the resolution per unit area decreases
Solution Approach 1:
The spectrum is divided into multiple spectral bands (e.g., blue, cyan, green, yellow, orange, red bands) that are spatially separated. Each band is then dispersed independently and mapped to a separate region on the detector array, allowing high-resolution spectroscopy within each band while using a compact 2D detector area.
Solution Approach 2:
The patent transitions from a 1D linear spectrum arrangement to a 2D detector array arrangement. By separating spectral bands in one dimension (spatial separation) and dispersing wavelengths in another dimension (dispersion direction), the system achieves high spectral resolution while efficiently utilizing the 2D detector area.
2Adaptability or versatility
If the spectrum is split into multiple beams for detection, then the spectral range can be covered, but power is lost in the splitting process
Solution Approach 1:
The patent extracts only the necessary spectral bands needed for the measurement and directs them to the detector, while other spectral regions are excluded from the optical path. This selective approach avoids the power loss associated with splitting the entire spectrum into multiple beams, as only relevant bands are processed.
3Quantity of substance
If a large detector area is used to capture the full spectrum, then complete spectral coverage is achieved, but the system becomes less compact and more complex
Solution Approach 1:
The detector array is divided into multiple detector regions, each corresponding to a specific spectral band. This segmentation allows the system to capture complete spectral information across different bands while using a compact detector area, reducing both physical size and system complexity.
Solution Approach 2:
By mapping spectral bands to different spatial positions on a 2D detector array rather than requiring a single large 1D detector, the system achieves complete spectral coverage with a compact footprint, simplifying the overall system design and reducing complexity.
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 higher optical resolution and detector efficiency with minimal power loss, allowing for a more compact spectrograph design that can achieve higher sensitivity and resolution for specific spectral bands, while optimizing the use of detector area.
Implementation Method 1
a separating element to separate an optical signal into a plurality of spectral bands that are spatially or angularly separated along a band separation direction
Implementation Method 2
a dispersive region of the plurality of dispersive regions is to disperse spectral components of a spectral band, of the plurality of spectral bands, along a dispersion direction to form a dispersed spectral band
Data Source
AI summary
An optical device may include a separating element to separate an optical signal into a plurality of spectral bands that are spatially or angularly separated along a band separation direction. Spectral ranges may differ among each spectral band of the plurality of spectral bands. The optical device may include a dispersive element comprising a plurality of dispersive regions. A dispersive region of the plurality of dispersive regions may disperse spectral components of a spectral band, of the plurality of spectral bands, along a dispersion direction to form a dispersed spectral band. The optical device may include a plurality of optical elements. An optical element of the plurality of optical elements may manipulate the dispersed spectral band in association with imaging the spectral band onto a detector area of a detector array. The optical device may include the detector array comprising the detector area.