Optical Receptacle Inclination Measurement Method
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Solution Overview
Problem
Existing methods for measuring the inclination angle of an optical flat surface in optical receptacles using a laser probe are limited by the requirement that light reflected from the surface must pass through an objective lens and reach a sensor, leading to reduced accuracy or impossibility of measurement when the inclination angle exceeds a certain threshold.
Innovation Solution
A method involving the use of a reference flat surface with a smaller inclination angle relative to the installation flat surface, allowing for the measurement of the optical flat surface's inclination angle by calculating the difference between the reference and optical flat surface angles, enabling accurate measurement even when the optical flat surface's angle is beyond the conventional measuring device's limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a laser probe is used to measure the inclination angle of an optical flat surface, then noncontact measurement is achieved, but measurement accuracy deteriorates when the inclination angle is large because reflected light does not return to the sensor
Solution Approach 1:
The measurement process is divided into two stages: first measuring the inclination angle of a reference flat surface (which is smaller and measurable), then measuring the inclination angle of the optical flat surface relative to the reference surface. This segmentation allows each measurement to be performed within the effective range of the laser probe, resolving the contradiction between noncontact measurement capability and measurement accuracy for large angles.
2Adaptability or versatility
If the inclination angle of the optical flat surface is increased to expand design freedom, then optical product design flexibility improves, but measurement accuracy deteriorates because conventional laser probe measurement becomes impossible
Solution Approach 1:
A reference flat surface is introduced as an intermediary element between the installation flat surface and the optical flat surface. This reference surface serves as a measurable intermediate reference that enables the indirect measurement of the optical flat surface's inclination angle, allowing large angles to be measured accurately while maintaining design freedom.
3Measurement precision
If a reference flat surface is introduced to enable measurement of large inclination angles, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The reference flat surface serves multiple functions: it acts as a measurable reference for the laser probe, provides a reference plane for angle calculation, and enables the measurement system to handle various inclination angles. This multi-functionality justifies the addition of the reference surface by providing substantial measurement capabilities without requiring multiple separate measurement systems.
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 approach allows for high-accuracy measurement of the optical flat surface's inclination angle, enhancing design flexibility and reducing production costs by enabling the creation of more complex optical products and utilizing conventional measurement devices effectively.
Implementation Method 1
light reflected on the optical flat surface does not appropriately return to the sensor
Data Source
AI summary
Provided is an optical receptacle (140) having an installation plane (141), an optical plane, and a reference plane (147). An inclination angle of the reference plane (147) with respect to the installation plane (141) is smaller than an inclination angle of the optical plane with respect to the installation plane (141). Then, a first inclination angle θ1 that is the inclination angle of the reference plane (147) with respect to the installation plane (141) and a second inclination angle θ2 that is an inclination angle of the optical plane with respect to the reference plane (147) are measured. Then, the first inclination angle θ1 is added to the second inclination angle θ2 to calculate a third inclination angle θ3 that is the inclination angle of the optical plane with respect to the installation plane (141).