Optical Rotator Galvanometers for Millisecond Beam Rotation
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Solution Overview
Problem
Conventional optical systems rotate images slowly due to reliance on mechanical rotation stages, leading to slow data collection and loss of resolution quality, and existing methods for rotating beams of light are complex, slow, or unsuitable for unpolarized light.
Innovation Solution
A system using mirror galvanometers and static mirrors to rapidly rotate a beam of light by moving between indexed mirror tilt angles, achieving rotation angles in milliseconds without relying on mechanical rotation stages or prisms, suitable for both polarized and unpolarized light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a mechanical rotation stage is used to rotate the image, then the image rotation function is achieved, but the rotation speed is slow and data collection is limited
Solution Approach 1:
The patent replaces the mechanical rotation stage with a galvanometer-based optical system. Instead of mechanically rotating the entire imaging system, the invention uses galvanometer mirrors to rapidly deflect the light beam, achieving image rotation through optical steering rather than mechanical rotation. This substitution enables rotation speeds in the millisecond range, dramatically improving data collection speed.
Solution Approach 2:
The patent divides the imaging system into multiple scanning channels, each with its own galvanometer. By splitting the incident beam into multiple beamlets and rotating them independently, the system achieves parallel processing capability. This segmentation allows simultaneous rotation of multiple beamlets, significantly increasing productivity compared to sequential mechanical rotation.
2Manufacturing precision
If prisms are used to rotate the beam, then rotation function is achieved, but resolution quality is lost due to distortions and aberrations
Solution Approach 1:
The patent replaces prism-based rotation with galvanometer-based optical steering. By using reflective galvanometer mirrors instead of refractive prisms, the system avoids the distortions and aberrations (such as astigmatism) that occur when light passes through prisms. The galvanometer mirrors reflect the light beam without introducing optical aberrations, thereby maintaining resolution quality while achieving the desired rotation function.
3Speed
If individual beamlets are rotated one at a time using mechanical flipping mirrors, then rotation is achieved, but the process is slow and overly complex
Solution Approach 1:
The patent divides the incident beam into multiple beamlets that can be processed in parallel. Each beamlet is directed to its own galvanometer, allowing simultaneous rotation of multiple beamlets rather than sequential rotation. This segmentation enables parallel processing, dramatically increasing rotation speed while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent uses dynamically controllable galvanometer mirrors that can be rapidly adjusted to different angles. The galvanometers provide dynamic, electrically controlled beam steering replacing static or mechanically flipped mirrors. This dynamic control enables rapid reconfiguration of beam paths and rotation angles, achieving high-speed rotation with simplified control compared to mechanical flipping mechanisms.
4Adaptability or versatility
If polarization optics are used to rotate beamlets, then rotation is achieved, but the method is not suitable for unpolarized light
Solution Approach 1:
The patent replaces polarization optics with galvanometer-based reflective steering. Since the galvanometer mirrors operate on the principle of reflection rather than polarization, they are insensitive to the polarization state of the incident light. This substitution makes the system universally applicable to both polarized and unpolarized light, significantly improving adaptability and reliability across different light sources and applications.
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 system enables rapid beam rotation with high resolution and clarity, allowing for quick image viewing and combination from multiple angles, improving data collection speed and image clarity.
Implementation Method 1
reflecting an incident beam of light at a different indexed reflection angle using a mirror galvanometer, the different reflection angle determined by the mirror tilt angle of the mirror galvanometer
Implementation Method 2
reflecting the first reflected beam with the static mirror to direct the first reflected beam to a second mirror galvanometer
Data Source
AI summary
Systems and methods to rotate a beam of light in an optical system include a first mirror galvanometer, a second mirror galvanometer, and a plurality of static mirrors. The first mirror galvanometer and the second mirror galvanometer are movable between different indexed mirror tilt angles. The different indexed mirror tilt angles cause an input beam of light to be reflected to and from different static mirrors of the plurality of static mirrors (e.g., which can be vertically stacked). A plurality of indexed mirror tilt angles rotate an input beam of light a plurality of indexed rotation angles by directing a reflected beam of light to and from the static mirror(s). Switching between indexed rotation angles can include an angle transition period of less than 50 milliseconds. The rotated beam of light is received at a microscope viewing device or at a sample being illuminated by the rotated beam of light.