Tomographic Imaging Modulation and Correction Device
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Solution Overview
Problem
Current tomographic image generation techniques face challenges in achieving high precision and increased penetration depth, particularly in medical applications where detailed and accurate images are crucial.
Innovation Solution
A tomographic image generation apparatus comprising a light source unit, optical control unit, optical coupler, and a modulation and correction device that includes an optical modulator and grating to modulate and correct light for enhanced image quality, with the ability to compensate for groove density differences between optical components, allowing for deeper penetration and clearer image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional light scanning is used in tomographic imaging, then the device structure is simple, but the penetration depth in the object is limited and image precision is insufficient
Solution Approach 1:
The patent introduces a modulation and correction device as an intermediary component between the light source and the object. This device includes a spatial light modulator that modulates the phase of incident light and a grating that corrects wavefront distortion, thereby improving image precision without requiring fundamental changes to the overall system architecture
Solution Approach 2:
The patent changes the physical parameters of light by modulating its phase and correcting its wavefront using the modulation and correction device. This allows the light to penetrate deeper into the object and improve image precision by altering the optical properties rather than changing the mechanical structure
2Length of stationary object
If conventional light scanning is used in tomographic imaging, then the device structure is simple, but the penetration depth in the object is insufficient
Solution Approach 1:
The modulation and correction device serves as an intermediary that prepares the light beam before it enters the object. The spatial light modulator and grating work together to optimize light propagation, enabling deeper penetration without requiring the light source or detector to be moved closer to the object
Solution Approach 2:
By modulating the phase and correcting the wavefront of the incident light, the patent changes the optical parameters to maximize penetration depth. This allows the light to maintain coherence and focus over longer distances within the object, achieving greater penetration without increasing physical dimensions
3Measurement precision
If an optical modulator is used to modulate light, then the image quality is improved, but unnecessary diffracted light is generated
Solution Approach 1:
The patent extracts or removes the harmful diffracted light generated by the optical modulator by introducing a grating that diffracts the modulated light in a controlled manner. The grating separates the useful modulated signal from the unwanted diffraction artifacts, effectively taking out the harmful components
Solution Approach 2:
The patent converts the harmful diffraction effect into a beneficial one by using a grating with specific groove density that matches the optical modulator. This controlled diffraction helps in spatial filtering and improving image quality by directing useful light while eliminating harmful diffracted light
4Adaptability or versatility
If the groove density of the grating is different from the optical modulator, then the device can be more flexible, but image precision deteriorates due to uncompensated diffraction
Solution Approach 1:
The patent changes the optical parameters by introducing lens pairs that can compensate for groove density differences between the grating and optical modulator. By adjusting the focal lengths and positions of these lenses, the system can maintain image precision even when using gratings with different groove densities, thus achieving both flexibility and precision
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 apparatus achieves more precise and detailed tomographic images by effectively modulating and correcting light, enabling deeper penetration and improved image quality, particularly in medical imaging applications.
Implementation Method 1
an optical modulator configured to modulate only light that enters from the optical coupler
Implementation Method 2
a grating configured to remove diffracted light unnecessarily generated in the optical modulator
Implementation Method 3
a first lens and a second lens disposed between the optical modulator and the grating and configured to compensate for the difference in groove density between the optical modulator and the grating
Implementation Method 4
an optical coupler configured to divide and combine incident light
Implementation Method 5
an object lens configured to focus light that enters from the galvanometer onto the object
Implementation Method 6
a galvanometer configured to reflect light that enters from the SLM to the object and reflect light that enters from the object to the SLM
Data Source
AI summary
A tomographic image generation apparatus includes a light source unit configured to emit light to be used for scanning an object; an optical control unit configured to control a direction of propagation of light; an optical coupler configured to divide and combine incident light; a plurality of optical systems optically connected to the optical coupler; and a modulation and correction device configured to modulate and correct the light to be used for scanning the object. The modulation and correction device may be disposed between the optical control unit and the optical coupler, or may be included in an optical system that irradiates light onto the object among the plurality of optical systems. The modulation and correction device may only modulate light that is reflected to the object.