Visible light positioning (VLP), using LED luminaires as beacons, is a promising solution to
the growing demand for accurate indoor positioning. In this paper, we introduce a two-stage …

In this paper, a new response approximation model for quadrant detector is proposed based
on a BP Neural Network by employing different training algorithms. A total of 1001 data …

Diffractive optical elements are increasingly favoured due to their ability to provide
numerous design freedoms by adjusting the Fresnel regions. The design freedoms make it …

Through the use of diffractive optical elements (DOEs) in electro-optical systems, significant
design freedoms have been achieved in these systems. Because of these design freedoms …

Traditionally, spot-positioning algorithms applied in quadrant detector (QD) face some
dilemmas, such as blind area between each quadrant, spot shape shift with Gaussian …

In this study, we propose a new method to improve the position measurement accuracy of
the traditional infinite integral method (IIM) based on a quadrant detector (QD). First, the …

The quadrant detector (QD) faces the limitation of a restricted field of view, which is
effectively circumvented by implementing a QD array. Despite the potential advantages …

Quadrant detector is a widely-adopted position sensor. By adopting ghost imaging, the four-
channel outputs of the detector can be multiplexed to position and image the target …

The detection range of a semi-active laser guidance system can deviate significantly from
the design value over a wide ambient temperature range. In this paper, a mathematical …

Machine tools play an important role in the manufacturing industry. The straightness error of
the guide rail during machining seriously affects the accuracy of the machine tool, which is …