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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Autocollimation angle-measurement method with a large range based on spot deformation.

Renpu Li, Han Xiao, Linyi Xie

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    |October 19, 2022
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    Summary
    This summary is machine-generated.

    A new hollow cylindrical cube-corner reflector (HCCCR) enhances autocollimator (AC) angle measurement range. This innovation extends the measurement range to ±30° and improves accuracy for pitch and yaw angles.

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    Area of Science:

    • Optics and Photonics
    • Metrology and Measurement Science

    Background:

    • Autocollimators (AC) are crucial for precise angle measurements.
    • Traditional ACs have limitations in measurement range and accuracy.
    • Cube-corner reflectors are commonly used in optical systems.

    Purpose of the Study:

    • To propose a novel hollow cylindrical cube-corner reflector (HCCCR) for autocollimators.
    • To enhance the angle measuring range of autocollimators.
    • To enable precise measurement of yaw and pitch angles.

    Main Methods:

    • Utilizing the parallel propagation characteristics of reflected and incident light.
    • Analyzing morphological changes of the reflected beam to determine angles.
    • Experimental validation of the HCCCR performance.

    Main Results:

    • Extended the autocollimation angle measurement range from ±30' to ±30°.
    • Achieved a dynamic measurement distance of 0.2–5m.
    • Obtained measurement accuracy better than 69" for pitch angle and 51" for yaw angle.

    Conclusions:

    • The proposed HCCCR significantly expands the angle measurement capabilities of autocollimators.
    • The HCCCR offers high accuracy for dynamic pitch and yaw angle measurements.
    • This reflector is a promising solution for advanced optical metrology applications.