Structured Light Pattern
Efficient illumination for 3D structured lighting applications
OSELA offers the most extensive off the shelf laser based pattern projectors available on the market for providing accurate depth and surface information. The projectors are widely used for 3D reconstruction, measurement, surface inspection tracking and surveillance and many other applications in 3D machine vision and active stereo.
Multi-line projection
A laser line projected on an object and seen from different viewpoints appear distorted due to the surface shape of the object, this geometrical deformation of the laser light is used to reconstruct the surface of an object. A faster and more efficient shape recovery method is to provide a series of parallel laser lines with one projection thereby limiting the need for scanning the object. The displacement of the stripes allows for an exact retrieval of the 3D coordinates of any detail on the object’s surface.
The multiple line generator can be offered over multiple product series ( Streamline, Compact, ILS, Fireline, SLP) from 1 to 99 lines over field of views up to 90 degrees. Wavelength ranges from 405 nm to 830 nm. Custom patterns readily available within weeks with low relatively low engineering fees.
Random Pattern Projection
Active Stereo requires structured light patterns to aid stereo matching, improving automatic correlation of images for more accurate depth mapping. This approach is particularly useful when imaging featureless objects, as projected laser light adds texture, enhancing the stereo algorithm’s ability to generate precise depth information.
Osela offers its Random Pattern Projector for wide fields of view in several wavelengths, dot densities, and eye safe configurations. The projector is available in both Streamline and Compact laser packages, providing flexible integration options for a variety of 3D imaging systems.
Beam Splitters/Dotted Row
Beam splitters creating dotted row patterns are needed for metrology and other various applications. The dotted row can be crossed to make a matrix of customizable aspect ratio. As an example, dotted rows are often used in the lumber industry for grading wood quality as the dispersion of the dots help define key parameters. Available in both Streamline and Compact packages and offered from 405 to 830 nm. Custom patterns available with low engineering fees.
Additional information on 3D imaging in Industrial application settings
Expertises
Diffractive Optics Technology
Diffractive optics allow lasers to project very complex and precise patterns when done correctly. Patterns such as multi-line, multi-dot and pseudo-random matrixes can be customized for different features and fields of view. Our patented in-house design techniques allow for high uniformity and efficiency for a wide range of wavelengths and beam characteristics.
Microfabrication of optical components
Osela’s competency in optical microfabrication and design gives us the ability to create optics with features down to nanometer precision. Our design capabilities include binary, grayscale and multi level diffractive optics. Etched directly in fused silica, the components are designed in-house with our proprietary software and are fully charactarized for any type of optical pattern.
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