Laser Beam Sensor Optics With Integrating Sphere Detection
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Solution Overview
Problem
Laser sensor systems for precise laser beam measurement in applications like PCB machining are complex, expensive, and bulky, necessitating a need for a system that provides consistent and precise results with low complexity and cost.
Innovation Solution
A laser sensor system comprising mirrors and photodetectors with partially-transmissive mirrors and curved mirrors to direct and measure laser energy, using an integrating sphere to reduce spatial and directional sensitivity, and a switch like an AOD or galvanometer system to selectively propagate the beam paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laser sensor systems are used for precise laser beam measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple optical functions (beam splitting, focusing, and detection) into a unified optical system where a single optical component performs multiple roles. The optical train is configured to simultaneously direct different portions of the laser beam through different paths to a common detection point, merging what would traditionally require separate systems into one integrated apparatus.
Solution Approach 2:
The optical component serves multiple functions: it acts as a beam splitter to separate the laser beam into different paths, as a focusing element to converge the split beams, and as a positioning element to ensure proper alignment. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity while maintaining measurement precision.
2Measurement precision
If traditional laser sensor systems are used for precise laser beam measurement, then measurement precision is improved, but system cost increases
Solution Approach 1:
By merging multiple optical functions into a single optical component and using a common detection path, the system reduces the number of expensive precision components required. Traditional systems would need separate beam splitters, focusers, and detectors for different measurement paths, but this invention consolidates them into one integrated system.
Solution Approach 2:
The optical component's multi-functionality means that one component performs the work of multiple separate components, reducing overall system cost. The single optical element handles beam splitting, focusing, and positioning tasks that would traditionally require multiple specialized components, each adding to the system cost.
3Measurement precision
If traditional laser sensor systems are used for precise laser beam measurement, then measurement precision is improved, but system size increases
Solution Approach 1:
The patent merges multiple optical paths and detection functions into a compact configuration where split beams are recombined and directed to a single detection point. This consolidation eliminates the need for multiple separate detection stations and reduces the overall spatial footprint of the measurement system.
Solution Approach 2:
The optical system uses clever spatial arrangement in three-dimensional space to achieve precise measurements without requiring large linear distances. By utilizing angular separation and spatial recombination of beams, the system accomplishes what would traditionally require extended optical paths in a compact volume.
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 achieves precise and consistent laser beam measurement with reduced complexity and cost, improving accuracy and efficiency in laser processing applications.
Implementation Method 1
The first optical train and the second optical train may include a partially-transmissive mirror and a curved mirror, wherein the partially-transmissive mirror is arranged and configured to receive the beam of laser energy, allow a first portion of the beam of laser energy to propagate therethrough, and reflect a second portion of the beam of laser energy
Implementation Method 2
The curved mirror is arranged to receive the first portion beam of laser energy from the partially-transmissive mirror and reflect the first portion of the beam of laser energy to the detector apparatus
Implementation Method 3
The detectors 36a and 36b are configured to sense or measure laser energy or power transmitted thereto, and generate sensor data based on the sensing or measurement
Implementation Method 4
In one embodiment, the detector apparatus is an integrating sphere
Data Source
AI summary
An optical apparatus is disclosed. In one embodiment. the apparatus includes a photodetector apparatus having a photodetector, a first optical component arranged to direct a first beam path along which a beam of laser energy is propagatable to a first optical train configured to direct the first beam path to the photodetector, and a second optical component arranged to direct a second beam path along which the beam of laser energy is propagatable to a second optical train configured to direct the second beam path to the photodetector. The first optical train and the second optical train include a partially-transmissive mirror and a curved mirror configured to allow a first portion of the beam of laser energy to propagate therethrough, thereby imaging an AOD pivot point at a location relative to the detector apparatus. The photodetector may be positioned in a detection port of an integrating sphere.