Author Archives: Moshe Danziger

Does Ambient Temperature Affect My Laser Distance Measurement?

Laser distance sensors use a laser diode to accurately measure the distance from the sensor to an object. The use of a laser diode is required since it emits only a discreet and specific wavelength constantly, though consistency of the wavelength depends on the voltage and current the diode receives. If these parameters are changed the wavelength changes as well, even if it’s less than a few nanometers. If the wavelength varies it slightly impacts the behavior of all the optics and lenses in the sensor and might cause a little decrease in the sensor’s performance resulting in a decrease in accuracy. That is why the guidance is to wait ~40 min after the sensor is powered on until it reaches temperature stability and the internal temperature is the same as when calibrated.

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So what is the difference between the CP-10 and CP-10HD sensor?

In the measurement world there is a trade-off between the distance from the sensor and the accuracy of the measurement. This is caused due to the numerical aperture of the sensor’s objective lens. The numerical aperture, or NA , is a dimensionless number that characterizes the range of angles over which the system can accept or emit light. The calculation is NA=n∙sinθ, where n is the index of refraction of the medium in which the lens is working (1.00 for air), and θ is the maximal half-angle of the cone of light that can enter or exit the lens.

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Control 2017 Q&A summary

At Control 2017 trade show Optimet presented its unique technology and applications, the ConoPoint-10 SMART Sensor with its built-in feature library, and Autofocus for material processing Systems. The demos created much interest and excitement.

We gathered together some questions we were asked at OPTIMET’s booth:

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When Should I Use an HD Sensor?

When choosing an optical displacement sensor for 2D or 3D scans there are many parameters which need to be taken into account for best results. If you approach an optical distance sensor distributor or manufacturer for a solution to your problem, he will ask you two main questions:

  1. What type of material do you need to scan?
  2. What level of accuracy is needed?
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The Best Way to Scan Coin Reliefs for Minting Perfect Coins

The accuracy of a coin is completely dependent on how well the reliefs or molds are created.

If this isn’t done just right, you risk:

  • Poor quality coins
  • Coins that are not all identical
  • Enabling counterfeiting

Clearly official mints are under a lot of pressure to create measured and traceable mints.

Measuring Coins and Minting Reliefs

Here’s how to they turn a coin relief into digital data.

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How to control laser focus in real time

microscopic picture of a slope done with laser engraving technology

New materials, component design and manufacturing, along with requirements for high quality products are the dominant drives for continuous performance improvements in laser drilling, cutting and welding systems.

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Challenging 3D Scans: Undercuts, Side Walls, and Inside Holes and Tubes

ConoPoint with Periscope

Ever try to use a non-contact distance measurement sensor (or optical sensor) to measure the inside of a narrow hole or tube?

How about scanning undercuts or side walls of 3D objects?

If you have, you probably know that it is not an easy task and can be expensive and complicated.  Typical triangulation-based sensors will certainly not capture these difficult shapes.  Even collinear sensors won’t be able to measure the 90° angles and hidden surfaces completely.

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