For a good part of my career, I thought of squareness—or, more correctly, perpendicularity—as a visual geometry. Many of the tools I use to inspect right angles are comparative and involve eyeballing, ...

Abstract: Perpendicularity is an orientation tolerance, and the perpendicularity of end face can be used to assess the axial assembly precision of multistage rotor. The aim of this article is to ...

Abstract: This article gives a new application of laser gyro in the field of metrology, that is, the perpendicularity measurement method between two axes of multiaxis turntables based on single-axis ...