Adaptive Optics Wavefront Sensor Correspondence Specification
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Solution Overview
Problem
Adaptive optics systems face challenges in accurately specifying the correspondence relation between converging spots and regions on a spatial light modulator, leading to degraded precision in wavefront distortion compensation, especially when aberrations are large, and existing solutions increase the number of components and light loss.
Innovation Solution
A method involving a spatial light modulator with a phase pattern having linearity in one direction displayed in a target region and spatially non-linear patterns in surrounding regions, allowing for accurate specification of converging spots and precise wavefront distortion compensation without adding new components, thus maintaining light intensity and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical plates or shutters are arranged before each lens to apply characteristics to light, then wavefront measurement capability is improved, but the number of components increases and light loss increases
Solution Approach 1:
The patent merges the characteristic application function into a single optical plate positioned after the lens array, rather than placing separate optical plates or shutters before each lens. This consolidation reduces the number of components while maintaining the ability to apply different characteristics to light passing through different lens regions, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The single optical plate performs multiple functions: it applies different optical characteristics to different regions of the wavefront, enables sequential measurement of multiple wavefront parameters, and reduces overall system complexity. This multi-functionality allows the system to achieve enhanced measurement capabilities without proportionally increasing component count.
2Measurement precision
If optical plates or shutters are arranged before each lens to apply characteristics to light, then wavefront measurement capability is improved, but light loss increases
Solution Approach 1:
By merging multiple optical plates into a single plate positioned after the lens array, the patent reduces the total number of optical interfaces and materials that light must pass through. This minimization of optical path interactions reduces cumulative light loss while preserving the functional capability to apply region-specific characteristics for accurate wavefront measurement.
3Measurement precision
If a phase pattern with linearity is displayed in target region and spatially non-linear patterns in surrounding regions, then correspondence relation between converging spots and regions is accurately specified, but system operation complexity increases
Solution Approach 1:
The patent segments the modulation surface into a target region and surrounding regions, applying different phase patterns to each segment. The target region uses a linear phase pattern for straightforward correspondence specification, while surrounding regions use non-linear patterns to eliminate adjacent converging spots. This segmentation enables accurate correspondence specification while maintaining manageable operational complexity through clear regional differentiation.
Solution Approach 2:
Different phase pattern characteristics are applied to different spatial locations: linear phase patterns in the target region for accurate correspondence measurement, and non-linear phase patterns in surrounding regions for converging spot elimination. This local quality approach optimizes measurement precision in the target region while using surrounding regions to simplify the overall correspondence specification process.
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 precise compensation of larger wavefront distortions by clearly specifying converging spots and regions, enhancing precision while minimizing light loss and component increase.
Implementation Method 1
a spatial light modulator configured to spatially modulate a phase of an optical image incident on a modulation surface
Implementation Method 2
a wavefront sensor including a lens array having N two-dimensionally arranged lenses corresponding to the N regions and an optical detection element for detecting a light intensity distribution including K converging spots formed by the lens array
Data Source
AI summary
An adaptive optics system includes a spatial light modulator configured to spatially modulate a phase of an optical image incident on a modulation surface including N two-dimensionally arranged regions and a wavefront sensor including a lens array having N two-dimensionally arranged lenses corresponding to the N regions and an optical detection element for detecting a light intensity distribution including K converging spots formed by the lens array and configured to receive the optical image after the modulation from the spatial light modulator, wherein a correspondence relation between the region of the spatial light modulator and the converging spot formed in the wavefront sensor is specified.