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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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How would I know if my HeNe laser tube is at end of life?
How low would the power rating have to be on a 1mW 633nm HeNe laser
tube before it is considered end of life? Sam, I need your help again |
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"LarryD" writes:
wrote: How low would the power rating have to be on a 1mW 633nm HeNe laser tube before it is considered end of life? Sam, I need your help again Try checking the high voltage with a CRT voltage checker. If the HV is there, the tube is probably bad. I've repaired a number of HeNe lasers through the years. 90% of the dead lasers were dead tubes. I think the question didn't have to do with a tube that was dead, but one that was weak. A tube rated 1 mW is considered end-of-life when its power drops below 1 mW at the spec'd operating current with proper mirror alignment. In other words, the power rating is the minimum output power within the tube's spec'd lifetime. However, mirror alignment is often an the cause for low power and that can be corrected. (But if this was a tube from a Laserdisc player with an output of 0.8 mW. I would expect that alone not to result in the player failing to operate correctly.) --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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