Helium-neon lasers

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  • japlytic
    Badcaps Legend
    • Oct 2005
    • 2086
    • Australia
    #1

    Helium-neon lasers

    Some of you may know that the early LaserDisc players and laser printers used helium-neon laser tubes, which have been replaced by strong semiconductor lasers which are more compact and efficient.

    With this in mind, I became curious about whether early CD players, CD-ROM readers and even CD recorders, along with other optical recording readers/writers (other than LaserDisc players) ever used helium-neon lasers - did any of these devices use such lasers?
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31015
      • Albion
      #2
      Re: Helium-neon lasers

      unlikely - have you seen the size of the tube?
      i'v got a couple.

        Comment

        • kc8adu
          Super Moderator
          • Nov 2003
          • 8832
          • U.S.A!
          #3
          Re: Helium-neon lasers

          i dont recall cd devices using them.
          i still have some including some compact ones with 12v supplies.
          these would be too big to fit a cd drive.

            Comment

            • redwire
              Badcaps Legend
              • Dec 2010
              • 3910
              • Canada
              #4
              Re: Helium-neon lasers

              I have a 1mW HeNe laser tube, it is about 10" long and 1" O.D from a grocery scanner bar-code applications 1.4kV at 4.5mA power. Spectra-Physics 088.
              You'd need precision movable mirrors to move the beam across a CD/LD which is not cheap at all. And they are just plain huge.
              Amazing to see the same brightness but fatter beam in a $0.99 laser pointer.
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