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Tag: He-Ne tube

Cat Links Personal Project, Randoms

eBay Flyback High Voltage PSU

Posted on September 1, 2016August 16, 2016 The Engineer

I have found myself needing some more in the way of High Voltage supplies of late, with the acquisition of the new He-Ne laser tubes, so I went trawling eBay for something that would be suitable to run these tubes. (I currently only have a single He-Ne laser PSU brick,

Continue readingeBay Flyback High Voltage PSU

Power Requirements for He-Ne Lasers

Power for a He-Ne laser is provided by a special high voltage power supply and consists of two parts (these maximum values depend on tube size – a typical 1 to 10 mW tube is assumed): Operating voltage of 1,000 to 3,000v DC at 3 to 8mA.Like most low current

Continue readingPower Requirements for He-Ne Lasers

Viewing Spectral Lines in Discharge, Other Colours in Output

For accurate measurements, you’ll need an optical instrument such as a monochromator or spectrophotometer or optical spectrum analyzer. But to simply see the complexity of the discharge spectrum inside the bore of a He-Ne laser tube, it’s much easier and cheaper. (Spectra for various elements and compounds can be easily

Continue readingViewing Spectral Lines in Discharge, Other Colours in Output

Demonstration He-Ne Lasers, Weatherproofing

Putting Together a Demonstration He-Ne Laser For a classroom introduction to lasers, it would be nice to have a safe setup that makes as much as possible visible to the students. Or, you may just want to have a working He-Ne laser on display in your living room! Ideally, this

Continue readingDemonstration He-Ne Lasers, Weatherproofing

Cat Links Computer Gear

ICL Barcode Scanner

Posted on August 2, 2010 The Engineer

An ICL barcode scanner from the 80s is shown here. This is the top of the unit with cover on. Plastic cover removed from the unit showing internal components. Main PSU on left, scan assembly in center. Laser PSU & Cooling fan on right. Laser tube at top. Closeup of

Continue readingICL Barcode Scanner

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  • Helium Neon Lasers
    • He-Ne Lasers – Introduction
    • Applications of a 1mW Helium-Neon Laser
    • He-Ne Laser Safety
      • Laser Safety Classifications
    • Theory of Operation, Modes, Coherence Length
    • He-Ne Laser Tubes, Heads, Structure, Power Requirements, Lifetime
    • Power Requirements for He-Ne Lasers
      • Modular He-Ne Laser Power Supply
    • Wavelengths, Beam Characteristics
    • Magnets in High Power or Precision He-Ne Laser Heads
    • Internal Mirror He-Ne Tubes up to 35 mW – Red and Other Colours
    • Viewing Spectral Lines in Discharge, Other Colours in Output
    • Demonstration He-Ne Lasers, Weatherproofing
    • Interesting, Strange, and Unidentified He-Ne Lasers

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