Optical Scanning Height Measuring Device Multi-Directional Irradiation
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Solution Overview
Problem
Optical-scanning-height measuring devices face challenges in measuring surface shapes due to insufficient reflected light strength, leading to unmeasurable regions on the measurement object, especially when the light direction and surface state do not favor light reflection.
Innovation Solution
The device includes a position-information acquiring section, a light emitting section, a deflecting and irradiating section, a light receiving section, and a height calculating section, which deflects and irradiates light on multiple portions of a partial region surrounding the measurement point, ensuring sufficient light reception and accurate height calculation regardless of light direction and surface state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light is irradiated from a single direction on the measurement point, then the measurement system is simple, but the reflected light strength becomes insufficient leading to unmeasurable regions
Solution Approach 1:
The measurement region is divided into multiple partial regions, and light is irradiated from multiple directions corresponding to each partial region. This segmentation allows the system to capture reflected light from different angles, ensuring sufficient light strength is received even when certain directions provide weak reflection, thereby eliminating unmeasurable regions.
Solution Approach 2:
The system transitions from single-direction irradiation to multi-directional irradiation by introducing angular dimensionality. The deflecting and irradiating section directs light from multiple angular positions around the measurement point, creating a three-dimensional irradiation pattern that ensures at least one direction provides sufficient reflected light for measurement.
2Measurement precision
If light is sequentially irradiated on multiple portions in a partial region, then sufficient light reception is ensured for height calculation, but the measurement time increases
Solution Approach 1:
The system uses periodic scanning to sequentially irradiate light on multiple portions in a partial region. The deflecting and irradiating section rapidly cycles through different angular positions, irradiating each portion in a periodic sequence. This allows the system to collect sufficient light data from multiple directions while maintaining efficient measurement speed through the periodic nature of the scanning process.
3Adaptability or versatility
If the measurement light beam direction is fixed, then the optical system is simple, but unmeasurable regions appear when surface state does not favor light reflection
Solution Approach 1:
The optical system transitions from a fixed light beam direction to a dynamic, adjustable direction system. The deflecting and irradiating section enables the measurement light beam to dynamically change its irradiation direction based on the measurement requirements and surface conditions, allowing the system to adapt to various surface states and eliminate unmeasurable regions caused by unfavorable reflection angles.
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 configuration reduces unmeasurable regions on the measurement object by ensuring sufficient light reception for height calculation, allowing for precise surface shape measurement across various surface conditions.
Implementation Method 1
light emitted from a light emitting section is deflected by a deflecting and irradiating section and is irradiated on a measurement object
Implementation Method 2
the measurement light beam reflected by the measurement object is used
Implementation Method 3
a light receiving section configured to receive light from the measurement object and output a light reception signal indicating a received light amount
Implementation Method 4
a detecting section configured to detect a deflecting direction of the deflecting and irradiating section corresponding to the partial region or an irradiation position of the measurement light
Data Source
AI summary
To provide an optical-scanning-height measuring device capable of reducing an unmeasurable region on the surface of a measurement object. Light emitted from a light emitting section is deflected by a deflecting section according to designation of a measurement point. Measurement light is sequentially irradiated on a plurality of portions P in a partial region PA including or surrounding a part of a measurement object S corresponding to the measurement point. A deflecting direction of the deflecting section corresponding to the partial region PA or an irradiation position of the measurement light corresponding to the partial region PA are detected by a detecting section.