Optical Imaging Alignment via Sensor Feedback and Automation
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Solution Overview
Problem
The existing methods for aligning optical imaging systems, such as those in ophthalmological instruments, are cumbersome and time-consuming, relying solely on visual observation and manual adjustment, which can lead to inaccuracies and inefficiencies, especially when aligning the optical axis parallel to a given axis.
Innovation Solution
A method that utilizes sensor-based detection and signal processing to visualize the alignment status on a display and generate control signals for actuators, allowing for partial automation of the alignment process, enabling precise adjustment of the optical imaging system relative to diaphragm apertures, and accommodating radiation in both visible and invisible spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If visual observation and manual adjustment are used for alignment, then the alignment process can be performed with simple equipment, but the alignment is slow and tedious with high risk of human error
Solution Approach 1:
The patent implements feedback by using sensors to detect the position of the light beam relative to diaphragm apertures and displaying this information in real-time on a monitor. The signal processing unit continuously monitors sensor signals and provides visual feedback showing the current alignment status, allowing the operator to see immediately whether the beam is correctly positioned through both diaphragm apertures. This feedback mechanism eliminates the trial-and-error nature of manual alignment and enables precise, rapid adjustment.
Solution Approach 2:
The patent replaces the purely mechanical/visual alignment system with an automated detection and control system. Sensors substitute for human visual observation, and the signal processing unit with display substitution for manual judgment. The system can fully or partially automate the alignment process by generating control signals for actuators, replacing manual mechanical adjustment with automated mechanical positioning.
2Measurement precision
If automated control signals are generated for actuators, then alignment precision is improved, but the device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the alignment system to automatically adjust itself without continuous human intervention. The signal processing unit autonomously evaluates sensor signals and generates control signals for actuators that automatically move the imaging system or diaphragm elements into correct alignment. The system can operate in fully automated mode where the alignment process is self-regulating, requiring minimal human input beyond initiating the process.
3Adaptability or versatility
If only visible light is used for alignment, then visual observation is straightforward, but invisible radiation sources cannot be used for alignment
Solution Approach 1:
The patent introduces sensors as intermediaries between the radiation beam and the operator. These sensors detect radiation across the electromagnetic spectrum including invisible wavelengths (UV, IR, etc.) and convert this information into signals that the signal processing unit can evaluate and display. The display unit acts as another intermediary, translating sensor data into visual representations that show alignment status. This intermediary chain enables the use of any radiation source type while maintaining ease of detection and measurement.
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
Facilitates faster and more accurate alignment of optical imaging systems by providing real-time visualization and automation, reducing human error and improving alignment efficiency, and allowing for the use of non-visible radiation sources.
Implementation Method 1
sensor elements (36) for detecting radiation of the radiation beam (30) are arranged in the region of the aperture (34) of the diaphragm member (24, 26)
Data Source
AI summary
An optical imaging system (12) is to be aligned with its optical axis (16) in relation to a given alignment axis (14). For this, a radiation beam (30) is emitted from one side of the imaging system (12) along the alignment axis (14). In the direction of beam propagation, there is located behind the imaging system (12) a pair of diaphragm elements (24, 26), whose apertures are each covered by a piece of material transparent to the radiation, carrying a plurality of sensor elements arranged in a matrix. The sensor elements furnish information about the measured radiation intensity to a signal processing unit (42), which can graphically illustrate the current alignment status of the imaging system (12) on a monitor (44) and/or produce an automatic adjustment of the imaging system (12).