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Related Concept Videos

Adjusting a Traverse01:12

Adjusting a Traverse

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

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Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...
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Two-Dimensional Force System: Problem Solving01:29

Two-Dimensional Force System: Problem Solving

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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
The first step to solving a two-dimensional force system problem is to draw a free-body diagram of the object under consideration. This diagram helps identify all the external forces acting on the object, including their...
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Updated: Jul 1, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Three-axis angle measurement method based on an optical wedge.

Jinkai Wang, Yangyang Bai, Wenhe Zhao

    Applied Optics
    |March 4, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel three-axis angle measurement technique using an optical wedge. The method achieves high accuracy for pitch, yaw, and roll angle measurements, proving insensitive to distance variations.

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    Area of Science:

    • Optics and Photonics
    • Metrology and Measurement Science

    Background:

    • Accurate three-axis angle measurement is crucial for various applications.
    • Existing methods may have limitations in accuracy, complexity, or range.

    Purpose of the Study:

    • To propose and validate a novel three-axis angle measurement method using an optical wedge reflector.
    • To derive and verify the mathematical model for angle calculation.
    • To assess the measurement accuracy and distance insensitivity of the proposed method.

    Main Methods:

    • Derivation of a mathematical model for three-axis angle solving.
    • Development of an optical simulation model for verification and correction.
    • Experimental validation using a principle prototype.

    Main Results:

    • The root mean square (RMS) errors for pitch (α), yaw (β), and roll (γ) angles were 6.27 arcseconds, 4.35 arcseconds, and 17.68 arcseconds, respectively, within a ±2° range.
    • Measurement accuracy demonstrated insensitivity to variations in measurement distance.

    Conclusions:

    • The proposed optical wedge-based method provides a feasible and accurate solution for three-axis angle measurement.
    • The technique shows promise for applications requiring precise angular measurements independent of distance.