Endoscope Light Source Real-Time Control During Filter Movement
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Solution Overview
Problem
Existing endoscope light source systems face challenges in accurately controlling light amounts during mode switches, as conventional methods require completion of optical filter movement before accurate light amount detection and adjustment, leading to prolonged adjustment times.
Innovation Solution
A light source apparatus with a processor that acquires light amount information from a sensor and optical member position data, allowing for real-time control adjustments by calculating the light source light amount value during optical filter movement, thereby shortening the adjustment time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical filter is moved to complete mode switching before light amount detection, then accurate light amount control is achieved, but the adjustment time is prolonged
Solution Approach 1:
The system performs preliminary actions by detecting the position of the optical filter during movement and pre-calculating the light amount correction value before the filter reaches its final position. This allows the light amount control to be prepared in advance, reducing the actual adjustment time when mode switching is completed.
Solution Approach 2:
The system implements feedback control by continuously monitoring the optical filter position during movement and using this information to dynamically adjust the light amount control values. The light sensor provides feedback on actual light amounts, which are corrected based on filter position feedback, enabling accurate control throughout the transition process.
2Loss of time
If light amount control is performed during optical filter movement, then adjustment time is shortened, but measurement accuracy may be compromised due to moving parts
Solution Approach 1:
The patent introduces an intermediary approach by using the optical filter position as a mediator variable. Instead of directly measuring light amount during filter movement (which would be inaccurate), the system measures light amount and uses the known filter position to calculate correction values, effectively mediating between the moving filter and the measurement process.
Solution Approach 2:
The system replaces the mechanical approach of waiting for the filter to stop before measurement with an optical-electrical solution. By using light sensors and electronic position tracking, the system substitutes the mechanical waiting process with electronic calculation and correction, enabling continuous control without physical interruption.
3Productivity
If the light sensor is positioned to detect light during filter movement, then real-time control is enabled, but reflected light from the filter may interfere with measurements
Solution Approach 1:
The system extracts and separates the reflected light component from the total light measurement. By identifying that reflected light from the optical filter is a distinct harmful factor, the system measures the total light and then subtracts the calculated reflected light component to obtain the accurate light amount from the light source alone.
Solution Approach 2:
The system converts the harmful reflected light into a useful measurement parameter. By tracking the optical filter position, the system can calculate the expected reflected light amount and use this information to correct the measurement, effectively turning the interference into a known variable that can be compensated for.
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
Enables accurate detection and adjustment of light amounts during optical filter movement, reducing the time required for mode switching and ensuring immediate, favorable endoscope image quality.
Implementation Method 1
a light sensor (2S) arranged adjacent to the light source (2A)
Implementation Method 2
an optical filter (5) laid out on the optical path of light emitted from the light source (2A)
Data Source
AI summary
A light source apparatus includes a first light source, a light sensor, an optical member, a driving circuit configured to move the optical member from a first position to a second position to insert/withdraw the optical member onto/from an optical path of light emitted from the first light source, and a processor. The processor is configured to acquire first information concerning a light amount of light received by the light sensor, acquire second information concerning a position of the optical member while moving from the first position to the second position, and output control information for controlling the first light source on a basis of the first information and the second information.