Laser produces minimal speckle interference

OCTOBER 6, 2008--The ZV-SLD laser series uses light sources that create less speckle interference due to a shortened coherence length. The devices combine higher spectral bandwidth with the higher intensities of laser diodes.

OCTOBER 6, 2008--The ZV-SLD laser series uses light sources that create less speckle interference due to a shortened coherence length. The devices combine higher spectral bandwidth with the higher intensities of laser diodes. An evenly distributed and low-speckle laser line can be created. "Speckle" describes random light patterns or sprinkles that occur if a coherent beam of light is diffusely reflected by a rough surface. By using a Powell lens, the laser projects a red line with a homogeneous intensity distribution at 680 nm and a maximal linewidth of 50 µm. The ZV-SLD provides 3 mW of output power with a 5-VDC power supply. Laser is freely focusable and available with all common optics, and is also equipped with automatic power control (APC) and reverse voltage protection.
Z-LASER Optoelektronik
Freiburg, Germany
www.z-laser.com

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PRESS RELEASE

PRESS INFORMATION 29.09.2008

The term "Speckle" describes random light patterns or sprinkles which occur if a coherent beam of light is diffusely reflected by a rough surface like metal, wood, plastics or a piece of paper.
The unevenness of the surface texture leads to phase changes of the scattered light waves which interfere again in the far field.
Laser speckles disturb the edge sharpness and homogeneity of the laser line and therefore, complicate measurements in certain application cases.

That's why in its new laser series, the ZV-SLD, the renowned laser manufacturer Z-LASER uses light sources which create significantly less Speckle interferences due to a shortened coherence length. These devices combine the advantages of a higher spectral bandwidth with the higher intensities of laser diodes.
An evenly distributed and almost speckle-free laser line can be created and best results can be achieved even for small measurement units.
By using a Powell lens, the laser projects a red line with a homogeneous intensity distribution at 680 nanometres and a maximal line width of 50 micrometres.

The ZV-SLD provides 3 milliwatts of output power with a 5VDC power supply.
It is freely focusable and available with all common optics. Additionally, the laser is equipped with an automatical power control (APC) and a reverse voltage protection.

The ZV-SLD is applicable, for example, in machine vision systems with a high measurements speed, 2D and 3D contour measurements, biometrical inspections as well as in research and development.

Z-LASER
Merzhauser Str. 134 ~ 79100 Freiburg ~ Germany
Tel.: +49-(0)761-29644-44 ~ Fax: +49-(0)761-29644-55
info@z-laser.de ~ www.z-laser.com

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