Thermal Laser Beam Profiler With Insulated Sensors
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Solution Overview
Problem
Existing beam profilers are complex and costly, requiring significant data processing to determine the intensity distribution and power of laser beams, which complicates the assessment of laser beam quality.
Innovation Solution
A beam profiler with a partial reflecting mirror and thermally insulated light receiving parts, using laser intensity sensors to measure thermal energy and calculate laser power and intensity distribution, simplifying the system by reducing data processing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a beam profiler uses a photoelectric device to measure intensity distribution, then measurement capability is improved, but device complexity and cost increase
Solution Approach 1:
The beam profiler divides the light receiving part into multiple regions (first light receiving part for center region, second light receiving part for outer region) that are thermally insulated from each other. Each region has its own laser intensity sensor, allowing independent measurement of different parts of the laser beam intensity distribution without requiring complex data processing
Solution Approach 2:
The patent replaces complex photoelectric detection systems with thermal detection using laser intensity sensors (thermocouples, thermopiles, thermistors, or platinum resistance temperature detectors) that measure temperature changes caused by absorbed laser energy. This substitution simplifies the measurement system while maintaining measurement capability
2Measurement precision
If multiple light receiving parts are used to measure different regions, then measurement accuracy is improved, but thermal interference between parts increases
Solution Approach 1:
The patent introduces thermal insulation structures (such as air gaps, insulating materials, or independent mounting structures) as intermediaries between the first light receiving part and the second light receiving part. These intermediaries prevent thermal energy transferred from one region from affecting the other region, eliminating thermal interference while maintaining the ability to measure different intensity regions simultaneously
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 solution allows for accurate and cost-effective determination of laser beam quality by reducing hardware complexity and processing needs, enabling efficient detection of abnormalities in laser beam intensity distribution.
Implementation Method 1
laser intensity sensors which are individually attached to the plurality of light receiving parts and which sense the intensity of the laser beam which is received by the light receiving parts
Implementation Method 2
The laser intensity sensor may include a thermocouple, thermopile, thermistor, or platinum resistance temperature detector
Implementation Method 3
sense the intensity of the laser beam which is received by the light receiving parts
Data Source
AI summary
A beam profiler which can determine whether or not a laser beam can be suitably output at a lower cost. The beam profiler is provided with a partial reflecting mirror, light receiving parts, and laser intensity sensors which are individually attached to the light receiving parts. The light receiving parts include a first light receiving part which receives a first region which includes an optical axis of the laser beam in a laser irradiation region of the laser beam and a second light receiving part which is insulated heat-wise from the first light receiving part and which receives a second region of a laser irradiation region which is different from the first region.