Optical Scanning Endoscope Drive Voltage Correction
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Solution Overview
Problem
Existing optical scanning endoscopes face challenges in maintaining a consistent scanning range due to temperature variations, which affect the driving voltage and electric current values, leading to inaccuracies in image acquisition and object scanning.
Innovation Solution
An optical scanning observation system that includes an endoscope with an optical scanning portion, a drive signal generation unit, an electric-current measurement unit, and a correction processing unit. The system measures electric current values at a predetermined temperature and stores them for later use, allowing for correction processing to adjust the scanning range based on pre-set parameters, ensuring consistent scanning performance across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature compensation is not implemented, then the device complexity is low, but the scanning range consistency deteriorates due to temperature variations
Solution Approach 1:
The patent applies preliminary action by pre-storing correction parameters in a storage unit before temperature variations occur. The system measures electric current values at a reference temperature, stores these values and corresponding correction parameters in advance, and then uses them for correction when temperature changes. This allows the system to maintain scanning range consistency without requiring complex real-time temperature compensation mechanisms.
Solution Approach 2:
The patent implements feedback by measuring the actual electric current value, comparing it with the stored reference value, and using the difference to select appropriate correction parameters. The correction processing portion continuously monitors the electric current and adjusts the drive signal amplitude based on the selected correction parameters, creating a closed-loop feedback system that maintains scanning range consistency despite temperature variations.
2Measurement precision
If electric current measurement and correction processing are added, then the image acquisition accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by using the optical scanning portion's own electric current characteristics for correction. The system measures the electric current consumed by the optical scanning portion itself and uses this information to determine the appropriate correction parameters. This self-measurement and self-correction approach improves image acquisition accuracy without requiring external calibration equipment or complex additional measurement systems.
3Reliability
If correction parameters are stored for multiple electric current values, then the scanning range consistency is improved, but the storage requirements and processing complexity increase
Solution Approach 1:
The patent applies parameter changes by storing correction parameters that correspond to different electric current value ranges rather than storing separate correction data for every possible temperature condition. The correction processing portion determines which correction parameters to apply based on the measured electric current value and selects from pre-defined correction parameter sets. This approach reduces storage requirements while maintaining scanning range consistency across varying temperatures.
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 maintains a consistent scanning range and improves image acquisition accuracy by correcting drive signal amplitudes and electric current values, thereby reducing the impact of temperature fluctuations on the scanning process.
Implementation Method 1
an optical scanning element which is configured to change a size of an angle of inclination of a minute mirror on which illuminating light from a light source is incident in accordance with a size of the driving voltage
Data Source
AI summary
An optical scanning observation system includes: an endoscope having an optical scanning portion for scanning an object; a drive signal generation portion configured to generate a drive signal and supply the signal to the optical scanning portion; an electric-current measurement portion configured to measure an electric current value of the drive signal; a first storage portion in which a measured electric current value when the temperature of the optical scanning portion is a predetermined temperature is stored; a second storage portion in which a plurality of parameters that are set according to the size of the measured electric current value are stored; and a correction processing portion configured to correct a scanning range of the endoscope by reading in from the second storage portion a parameter that corresponds to the size of the measured electric current value read in from the first storage portion.