Related references
Note: Only part of the references are listed.
Article
Instruments & Instrumentation
Ralf D. Geckeler et al.
Summary: Autocollimators are versatile devices used in engineering and manufacturing for angle metrology. Recently, PTB and VTT MIKES have developed specialized calibration devices to expand the calibration capabilities of autocollimators from plan angles to spatial angles. Comparing calibration results allows for evaluation of measurement errors and uncertainty of the devices.
Editorial Material
Instruments & Instrumentation
B. P. Leonard
Summary: Paul Quincey argues for recognizing angle as a base quantity and radian as the base unit. He demonstrates how rotational motion equations can be explained by dimensionally consistent explicit-radian equations using the radian convention. However, based on fundamental physical principles, it is shown that the radian convention cannot be applied to torque, angular momentum, or moment of inertia.
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Instruments & Instrumentation
Paul Quincey
Summary: A recent proposal suggests changing the status of radians and steradians in the International System of Units, while still allowing their use within equations as before. This change aims to provide a physics-based, consistent, and logically robust unit system, with clearer units for all physical quantities, while minimizing disruptions to familiar equations for typical end-users.
Article
Instruments & Instrumentation
Paul Quincey
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Instruments & Instrumentation
Paul Quincey et al.
