Optical Image Measurement Laser Intensity Control
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Solution Overview
Problem
Conventional optical image measurement devices are prone to reduced light irradiation due to environmental temperature effects and light source degradation, leading to obscured images and potential eye damage from intense laser beams, with cumbersome light measurement processes complicating operator tasks and safety.
Innovation Solution
An optical image measurement device with a light amount measurement part integrated within, allowing for easy measurement and adjustment of laser beam intensity using a mode switching mechanism, alarm system, and irradiation prevention to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light amount measurement device is arranged outside the light path to measure laser beam intensity, then measurement safety is improved, but device complexity and operational complexity increase
Solution Approach 1:
The patent introduces a light amount measurement device as an intermediary component that can be selectively positioned in the light path. This mediator allows for safe measurement of laser beam intensity without requiring permanent external measurement equipment, thereby improving safety while managing device complexity through selective integration.
Solution Approach 2:
The patent implements a mode switching mechanism that dynamically reconfigures the measurement device's position in the light path between different operational modes (measurement mode and imaging mode). This dynamic reconfiguration allows the system to adapt to different operational requirements, improving safety during measurement while maintaining imaging capability when needed.
2Measurement precision
If light amount measurement is performed manually with separate equipment, then measurement precision is improved, but ease of operation deteriorates due to cumbersome procedures
Solution Approach 1:
The patent merges the light amount measurement function with the existing imaging device by integrating the measurement device into the optical path and controlling it through the same device controller. This integration allows precise light amount measurement to be performed automatically during imaging operations, eliminating the need for separate manual measurement procedures and significantly improving ease of operation while maintaining measurement precision.
Solution Approach 2:
The patent implements a feedback mechanism where the light amount measurement device continuously monitors laser beam intensity and provides this information to the device controller. The controller then uses this feedback to automatically adjust imaging parameters or alert the operator, enabling precise measurement without requiring manual intervention and improving operational ease.
3Device complexity
If laser beam intensity is not automatically adjusted, then device complexity is reduced, but reliability deteriorates due to potential eye damage from intense laser beams
Solution Approach 1:
The patent implements preliminary action by measuring the laser beam intensity before actual imaging operations begin. The light amount measurement device characterizes the laser beam properties in advance, and the device controller uses this information to pre-adjust imaging parameters such as gain and exposure settings. This preliminary characterization and adjustment ensures safety and optimal imaging quality before the actual measurement process starts.
Solution Approach 2:
The patent employs feedback control where the light amount measurement device continuously monitors laser beam intensity during operations and provides real-time information to the device controller. The controller automatically adjusts imaging parameters based on this feedback to maintain safe and optimal laser levels, ensuring reliability without requiring complex manual control systems.
4Ease of operation
If light amount measurement is integrated into the imaging device, then ease of operation is improved, but measurement precision may deteriorate due to interference with the imaging light path
Solution Approach 1:
The patent applies segmentation by dividing the optical path into separate measurement path and imaging path segments. The light amount measurement device is positioned to measure laser beam intensity without interfering with the imaging light path, allowing both functions to operate simultaneously with high precision. This spatial segmentation enables easy operation through integrated control while maintaining measurement precision by isolating the measurement function from imaging operations.
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 straightforward light measurement and adjustment, enhancing image quality and safety by automatically maintaining optimal light levels and preventing excessive laser exposure.
Implementation Method 1
a light source that generates a laser beam
Implementation Method 2
scanning part that scans the laser beam on a measured object by changing the irradiation position of the laser beam on the measured object by changing the direction of a galvanomirror
Implementation Method 3
detection part that detects the laser beam reflected by the measured object
Data Source
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AI summary
An optical image measurement device comprises: a light amount adjustment part that adjusts the light amount of a laser beam generated by a low coherence light source 201; and a photodiode 105 placed outside the light path of the laser beam irradiated on an eye E and capable of measuring the light amount, wherein the laser beam is input to the photodiode 105 by changing the direction of a galvanomirror 170B; the photodiode 105 measures the light amount of the input laser beam; and the light amount adjustment part previously stores a specified range of light amount and adjust the light amount of the laser beam generated by the low coherence light source 201 such that the light amount measured by the photodiode 105 falls within the specified range.