The requirements of laser lines for 3D scanning

The requirements of laser lines for 3D scanning

Aug 27, 2020

In recent years, 3D scanning, as a fast 3D digital technology, has been increasingly applied in various fields, including reverse engineering, industrial detection, machine vision, and so on. Especially in the rapidly developing field of 3D printing and intelligent manufacturing, 3D scanning, as the front-end 3D digitization and 3D vision sensing technology, has become an important link in the industry chain.

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A laser 3D scanner projects laser lines on the object, while structured light projects a focused grid from a digital projector.


In order to make up for the inadequacy of the white light 3D scanning technology, a kind of on line laser as light source scanning technology arises at the historic moment, the technology is still based on eye visual level 3D scanning principle, the difference is the line laser projector as a design, design and does not change over time, laser compact structure simple, becomes light scanning equipment, without additional support stabilizer auxiliary measure, can hold measurement which is its typical characteristics. Elite provides not only the single uniform line laser, but also the equally distributed multi-line laser or special lens customized diffractive optical elements (DOE) laser. This special solution has solved “bright spot” at both ends of the laser line and improved beam quality. Therefore, the sharpness and resolution of scanning can be improved.


A laser module utilizing a Powell lens or DOE lens, often referred to as a structured light laser, is preferred for applications with more exacting requirements. A Powell lens resembles a round prism with a two-dimensional aspheric element on its apex. The output line from Powell lenses is a uniform distribution of energy. This is achieved when the laser beam hits the apex causing spherical aberrations (imperfection of the produced image) within the lens redistributing the light such that it decreases the light in the central area of the line while increasing the light intensities at the ends of the line. The output is an optically efficient, uniform line.

Powell Lens

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Special Lens

Uniform Line Laser(15)


This type laser with a high quality uniform laser line in a robust brass or aluminium housing, compact, and cost-effective ideal for automation, machine vision, image processing, digital data acquisition, counting, precision 3D scanner and science & medical application. You can know the following characteristics of this uniform line laser which will be the best choice for the fastest-growing 3D technology manufacturers. 


High-quality laser diode, optical glass lens, driver circuit and housing.


Uniform, non-Gaussian intensity distribution along the line


Superior focusing quality


Wide range of powers and fan angles and structured light patterns


High pointing stability and high reliability




Protection against over-voltage, reverse polarity of power supply, overheating and ESD



Rugged, shock and vibration resistant design

3D scanning is typically carried out utilizing a laser and a sensor together. These systems allow the user to capture the properties of the item being scanned and replicate it using a 3D printer. Laser diode modules have become the preferred technology in 3D scanning due to the availability of compact form factors, wavelength and power considerations, as well as optical performance and repeatability. Also, wavelength, optical performance and reliability are critical considerations when specifying a laser module for 3D scanning and printing requirement. Elite, as a laser module manufacturer, as well as a laser module solution provider, we have access to a wide variety of wavelengths (405nm-850nm) at output power (10mW-400mW) with the available fan angles 10° 20° 30° 45° 60° 75°and the superior straightness less than 0.1%, also the relative intensity more than 80%. It enables the laser beam to be optimally divided into a straight line with uniform optical density, high stability and high linearity after passing through. Powell lens lineation is superior to the cylindrical lens lineation mode, which can eliminate the central hot spot and fading edge distribution of the Gaussian beam.

If you need to know more about our line laser or planning to customize the laser module, please email your specifications to and briefly describe your requirements or applications to us. We will reply to you in a very short time. Thank you!