Structured light projector meeting variation ranges of high speed and high brightness

Abstract

A structured light projector meeting the variation ranges of high speed and high brightness comprises a programmable projection master control module, an input / output synchronous triggering module, an LED lighting module and an optical-mechanical system, wherein the programmable projection master control module is connected with a computer to receive the controlled information and video signals, so as to download structured light images with certain characteristics from the computer; one end of the input / output synchronous triggering module is connected with an external hardware, such as a camera, to receive and send synchronous signals, and the other end thereof is connected with the programmable projection master control module so as to send the external triggering information to the master control module; the LED lighting module is connected with the programmable projection master control module so as to receive the control information for adjusting the brightness and on-off of the LED chip; and the optical-mechanical system of the whole projector is used for completing the projection of the structured light images. The projector provided by the invention has the characteristics of compact structure, quick projection, high projection precision, and higher brightness variation range of the projection brightness, and is of significant value in various active optical measurement systems of structured light to be projected.

Description

Technical field [0001] The invention relates to a high-speed, high-brightness variable range structured light projector, which can be used for projecting structured light with specific characteristics in a structured light three-dimensional shape vision measurement system. The invention belongs to the technical field of optical three-dimensional measurement. Background technique [0002] Among the optical non-contact 3D shape measurement methods, the structured light 3D shape measurement technology has the characteristics of large range, non-contact, fast speed, and good system flexibility. It has been widely used in 3D model reconstruction, 3D measurement of object surface contours, and In the industrial environment, size and shape parameter detection and other fields. For the structured light three-dimensional shape vision measurement system, stable, high-speed, and accurate projection methods are very important. [0003] At present, the structured light projection method at ho...

AI Technical Summary

Problems solved by technology

Projection equipment using gratings and interferometers requires good mechanical stability and precise mechanical movement mechanisms, which are limited in application; although commercial projection equipment and acoustic grating fringe interference devices have small size, stable performance, and can be controlled by computers It has the advantages of freely changing the style of the projection pattern, but it has great limitations in speed and projection brightness range, and it is difficult to meet the needs of high-speed and high-brightness change range in the field of three-dimensional measurement.

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