A calibration method for triangulation based on grating of non-diffraction;

Application of laser-based position sensitive detector in optical triangulation;

Dual non diffracting beams based on triangulation system are proposed.

Aiming at the requirement of liquid-level measurement for stereolithography(SL),the paper put forward a new method of laser liquid-level measurement based on position sensitive detector(PSD),which could carry out non-contact precision measurement,using laser triangular surveying theory.

With urban constructions constraining view, it is difficult to build urban control network by means of triangular surveying.

Applying wavelet analysis to non diffracting beam based on triangulation measurement to remove noise signals is proposed in this paper.

The laser sensor which based on laser triangulation measurement combines the special mechanism.

This article presents a new method of calibrating structlight according to the principle of triangle measurement and the characteristics of structlight scanning.

In this paper,the calibration methods and its deficiencies of international norm and national norm for theodolite vertical angle are dissertated,then one reasonable and integrated scheme is presented base on the definition of vertical angle.

The calculation method of deducing horizontal distance and elevation difference between two points by utilizing the vertical angle and reading measured with theodolite.

The vertical angle refers to the difference between the vertical readings.