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How to measure a Barcode scanning laser? [Updated]

Measuring the power of scanning lasers such as barcode scanners presents a problem. A bar code laser beam scans back and forth at a very high frequency so an ordinary photodiode power meter will not measure the power in the beam but rather the average power impinging on it, i.e. the power times the fraction of time the beam is on the detector. Therefore, when exposed to a scanned beam, the reading will be much lower than the actual power in the beam. For example, if a scanning laser delivers 2mW to a photodiode sensor and the beam is on the sensor only 1% of the time, the instrument will read only 0.02 mW.

How to measure a Barcode scanning laser? [Updated] Read Post »

“Power from Pulse” – How to Measure High Power Lasers with Small Sensors

A few months ago, I mentioned a new method for measuring kilowatt lasers without water (or even fan) cooling.

The idea was like this: Even a small 50 W sensor can handle high powers for a short amount of time, like a few seconds. Several of our sensors’ specifications were adjusted to reflect this.

For example, the L40(150)A is meant to measure 40 W continuously, but it can actually measure 4000 W for a second.

“Power from Pulse” – How to Measure High Power Lasers with Small Sensors Read Post »

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