VIEW Micro-Metrology systems support a variety of laser sensors that are implemented either through-the-lens (TTL) or mounted at an offset to the video camera. The primary factors dictating the use of a given laser sensor include the sensor’s measurement range, resolution, spot diameter, working distance, and ability to work with specular or diffuse surfaces.

Through-the-Lens (TTL) Laser Integrated Laser Option

VIEW Micro-Metrology’s on-axis TTL laser shares the same optical path as the system’s video cameras. Laser light travels through the imaging optics to the surface being measured, and is then reflected from the part surface back through the optics to a laser sensor.

This laser configuration allows measurement of recessed surface features or those features adjacent to vertical surfaces. It provides rapid (<0.5 second) auto-focus capability, accurate single-point Z-height measurement, and rapid (up to 10,000 points/second) 3D surface scanning. With a spot size smaller than 10 microns, Z-height resolution of 0.1 micron, and effectiveness on both matte and specular surfaces, the TTL laser extends VIEW Micro-Metrology’s vision system versatility.

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Datasheet

Confocal Laser Probes Active Confocal & Dynamic Focus Technologies

LT Active Confocal Lasers:

• Are for high accuracy and repeatability applications where the expected range of repeatability is 0.2 - 0.5 microns.
• Use a combination of light quantity measurement through a fixed circular aperture and the height position of a dynamically focusing objective lens to determine only the peak light quantity value focused at the aperture and calls that the Z displacement position of the observed surface.

LT Active Confocal Lasers can be used on opaque, transparent, translucent, wet, or dry surfaces and materials. The LT 8010 sensor is preferred for ultra-flat and rounded surface features. The LT 8110 sensor is preferred for flat, angled, tapered, step height, or groove depth type surface features.

Triangulation Laser Probes Charge Couple Device - CCD Technology

LK Diffuse Reflective Lasers:

• Are for high repeatability applications where effective resolution is between 1.0 - 3.0 microns
• Use a Charge Couple Device (CCD) that precisely measures only the peak value of the light quantity distribution intensity of the light beam spot. It finds the peak light intensity value using the pixels of the CCD and calls that the Z displacement position of the surface.

CCD laser triangulation systems are subject to variations in Z-axis displacement measurement due to variations of light intensity (surface reflections) throughout the entire light spot. The LK series sensors have less resolution than the LC but can accommodate a very wide range of surfaces.