Optical Beam Adjustment Device Using Dual Detectors
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Solution Overview
Problem
Existing methods for adjusting light beams in optical systems are complex and lack a simple, efficient way to measure and correct beam parameters, such as spatial offset and angle, which hinders precise alignment with the optical axis.
Innovation Solution
A device with at least two photo detectors spaced differently from the coupling-in point, along with a beam splitter, directs the light beam to determine deviations and adjust optical elements to bring the beam into nominal position, utilizing 2-dimensional position-sensitive detectors for precise measurement and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple photo detectors and beam splitters are used to accurately determine beam deviation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses two photo detectors positioned at different distances from the coupling-in point along the optical axis, adding a dimensional aspect to the measurement. By measuring beam position at two different axial locations, the system can determine both lateral offset and angular deviation, achieving complete beam characterization without requiring complex multi-beam-splitter arrangements.
Solution Approach 2:
The patent introduces a simple beam splitter that directs the coupled-in light beam to the photo detectors. This intermediary element enables simultaneous measurement at two positions without requiring complex optical paths, simplifying the overall device architecture while maintaining measurement precision.
2Ease of operation
If manual adjustment methods are used to align the light beam with the optical axis, then ease of operation is reduced, but manufacturing precision can be maintained
Solution Approach 1:
The patent implements a feedback mechanism where photo detectors continuously monitor the beam position and provide signals to control the positioning mechanism. This closed-loop feedback enables automatic adjustment of the beam alignment, making the system easy to operate while maintaining high precision through continuous correction of misalignments.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated positioning mechanism controlled by electrical signals from the photo detectors. This substitution eliminates the need for operators to manually manipulate optical elements, significantly improving ease of operation while maintaining or enhancing alignment precision through electronic control.
3Device complexity
If a single photo detector is used to detect beam position, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent positions two photo detectors at different axial distances from the coupling-in point, adding the axial dimension to the measurement system. This dimensional approach enables the determination of both lateral beam offset and angular deviation, achieving complete beam characterization with simple detectors rather than requiring complex single-detector systems.
Solution Approach 2:
The patent divides the measurement function between two separate photo detectors, each performing a simple position detection task. This segmentation allows each detector to remain simple and inexpensive while the combined measurements from both detectors provide comprehensive and precise beam characterization that would be difficult to achieve with a single complex detector.
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
This solution allows for simple, fast, and accurate adjustment of light beams in optical systems by measuring beam parameters and adjusting optical elements, ensuring the light beam aligns with the optical axis, enhancing the precision and ease of optical device construction.
Implementation Method 1
at least one beam splitter being arranged in the coupled in light beam which directs the coupled in light beam to the at least one photo detector
Implementation Method 2
directing the coupled in light beam to at least two photo detectors wherein each of the photo detectors is spaced differently from the coupling-in point
Data Source
AI summary
A device (70) is disclosed for adjusting a light beam (1) in an optical system (100), whereby the optical system (100) defines an optical axis (60). The device (70) for adjusting comprises means for coupling-in (3) of the light beam into a housing part (80) of the device (70). The means for coupling-in (3) determines a coupling-in point (3a) and a coupled in light beam (9). At least a first and a second photo detector (10, 22) are arranged in different in distances to the coupling-in point. (3a). In the coupled in light beam (9) at least one beam splitter (36) is provided, which directs the coupled in light beam (9) on at least one of the photo detectors (10, 22).