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Entries for the '3D Measurement' Category

Line Laser Thickness and 3D Inspection
Leon Grossman

Line Laser Thickness and 3D Inspection

I recently implemented a project where we were using a SICK Ranger camera to measure a part. This camera works by measuring the position of light from a line generating laser on its 2D field of view and translating that to a height position. This works because features that are higher and closer to the camera will be closer to the top of the camera's 2D field of view and things that are lower will be closer to the bottom. This is the same effect can easily be seen in shadows when the sun is ...

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Edmund Double-Gauss Lenses Produce Sharp Focus
Ken Brey

Edmund Double-Gauss Lenses Produce Sharp Focus

I have been working on a 3D vision application using the SICK Ranger camera. My application involves precision measurement, so I want to get the best results possible from the equipment. The Ranger came with a Fujinon 35mm lens which focused sharply in the center of the field of view. However there was significant blur near the edges. (The CMOS sensor on the Ranger is 15.4mm diagonal. That exceeds the specification of most common machine vision lenses.) I tried a Tamron 35mm lens, and ach...

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Ken Brey

NASA sees the advantages of Structured Light for 3D vision

Recent press releases by NASA show how the agency is realizing the advantages of using Structured Light for 3D vision. A recent NASA Invention of the Year was a hand-held, battery-operated scanner that they use to create surface maps of shuttle tile damage. The same high-speed 3D scanner technology can also be used for longer range 3D measurements. NASA is investigating using this method for Rover Navigation and in-flight shuttle inspection with a system mounted on the robotic arm. DMC ...

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Matrox Introduces 3D Scanning in MIL 9
Ken Brey

Matrox Introduces 3D Scanning in MIL 9

Matrox has added 3D scanning tools to the Matrix Imaging Library (MIL), version 9.0. The concept is similar to that employed in single-purpose devices by Micro-Epsilon and SICK. (see Two 3D Scanner tools.) The camera images a laser line from an out-of-plane location and processes the line position and shape as 3D points. The difference is that while the others process the line directly in the camera and transfers only a single line of height information, Matrox transfers the raw image to the ...

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New 3D Measurement Tool from IFM
Ken Brey

New 3D Measurement Tool from IFM

I saw an amazing new 3d vision tool at the Robot and Vision Show today. It is the ifm efector pmd 3d. This device is a 64X48 pixel distance sensor. It operates by the time of flight principle. A pulse of light infra-red light is emitted by the device which bounces off of object in the field of view and returns to the device through a lens. Each pixel measures the time required for the light to make the round trip. By this way it produces a 3D image of the object in front of it. The unit c...

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Two 3D Scanner tools
Ken Brey

Two 3D Scanner tools

Purpose-built 3D scanning tools are an exciting new development in machine vision. People have been building their own 3D scanners for years with cameras and line lasers . Now a couple of integrated and factory-calibrated units are on the market which offer a great head-start to a successful 3D scanning application. SICK | IVP Ruler E: This is the integrated and calibrated version of the Sick Ranger product line. Specs: 13 varieties available 1536 pixel profile width max 10,...

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