…uniform intensity lines. It is designed for years of reliable operation in systems where size and weight are a limitation. These patented line-generating optics have been integrated into the Mini laser to yield the same uniform non-Gaussian lines as our well-known SNF laser line generators. Despite…
…in the xy camera image are converted into z axis depth information. Key laser projector parameters for this application are line straightness, uniform line thickness, and high pointing stability. Good line brightness uniformity is also desirable but not mission-critical. Red (diode-based)…
…Line Manager for Machine Vision at Coherent Inc. (Santa Clara, California). "Most applications use some an array camera to image the pattern projected on to the test object. Simple trigonometry then enables the system processor to convert lateral pixel offsets in the recorded image line or lines…
…laser line parameters are specified. In laser-based triangulation systems, a narrow band of light projected onto a 3D surface produces a line of illumination that will appear distorted from an observation perspective other than that of the projector (Figure 1). Analysis of the shape of these line…
…produces a line of
illumination that appears distorted from perspectives
other than that of the projector. These distorted
perspectives can be used for an exact geometric
reconstruction of the surface shape.
In a typical 3D triangulation sensor, the laser line
Laser line patterns are often generated by cylindrical optics that produce a Gaussian line profile with a bright center
and fading ends. Lasiris patented optics spread the light into an evenly illuminated line.The result is a crisp, uniform
line with sharp ends.
…suited for Raman experiments in the visible region of the spectrum. Innova 70C Spectrum is a mixed gas lasers that can generate a number of laser lines from the UV to the near IR. Ultraviolet (UV) resonance Raman spectroscopy is a useful tool for the investigation of molecular structure, kinetics,…
…substantially reduces height resolution because the camera and laser line projector points
of view are so similar. Additionally, there is some occlusion.
Achieving optimum performance from a machine vision system based on laser line projection requires understanding the trade-offs inherent…
…Tecnalia produces vision-based
automated surface inspection and
triangulation sensors (3-D measurement), mainly for hot conditions.
Z-Laser produces laser line projectors
for 3-D vision applications (output intensities: 1 to 6000 mW; wavelengths:
404 to 980 nm).
…wavelength. The internal pulse width modulation (PWM) of the DLP was used in this
experiment to dither the "white" lines of pixels.
[Note: PWM is used by the projector (from which the DLP has been extracted) to display
colors. The full color refresh cycle of the DLP is approximately…
…architecture is the single straight line
projection geometry. Here, simple optics fan out the laser beam so that it forms a straight line of
illumination on the part. When viewed by a camera from an angle different from the projector, the line is
distorted by the surface of the…
Growing Need for 3D Inspection".)
Key laser projector parameters for this application are line straightness,
uniform line thickness, and high pointing stability. Good line brightness
uniformity is also desirable but not mission-critical. Red (diode-based)
modules have been…