Can I get a definitive answer to this noobly question

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[ARCHIVED THREAD] - Can I get a definitive answer to this noobly question

Posted: 11/18/2017 3:34:30 PM EDT

Surprisingly this hadn't been addressed in the "Do's and Dont's of NVGs" thread the last time I went through it (at least not directly and definitively):

Is exposing your UNCOVERED objective lense to bright light bad for the tube when the unit is powered off, or when the battery has been removed? Does this risk reducing tube lifespan, or risk blemishing a tube? Or is this only possible when the unit is powered on?

Posted: 11/18/2017 5:55:20 PM EDT

[#1]

This was asked many times a few years ago with some debated until an ITT factory photo showed hundreds of PVS-14 on the floor built up ready for shipment with NO day light covers on. The answer is NO, but do take the batteries out when not in extended use and to avoid leakage. And for added protection, also leave the day cap on in case the unit gets accidentally turned on with batteries in

Posted: 11/18/2017 11:08:47 PM EDT

[#2]

Quote History

Quoted:
This was asked many times a few years ago with some debated until an ITT factory photo showed hundreds of PVS-14 on the floor built up ready for shipment with NO day light covers on. The answer is NO, but do take the batteries out when not in extended use and to avoid leakage. And for added protection, also leave the day cap on in case the unit gets accidentally turned on with batteries in

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THANK YOU.

I was very surprised how difficult it has been to find this simple answer.

I always take the battery out and have the cover on for extra assurance.

Posted: 11/18/2017 11:38:45 PM EDT

[#3]

No problem most of the time but dont leave on the dash of yor car in the Texas sun. It will burn the photocathode.

Posted: 11/19/2017 4:41:15 AM EDT

[#4]

if you have just been using it and turned it off - then it can be affected by light - there must be some residual charge in the system , so allways put the caps on straight away.
i have had a ghost image on both tubes by fliping unit up to turn off then taking it off head , putting it down - then building lights turned on and it left for not long , it was pointing up , lucky the image faded away after some time but it shows it can happen .

Posted: 11/19/2017 2:40:04 PM EDT

[#5]

Quote History

Quoted:
if you have just been using it and turned it off - then it can be affected by light - there must be some residual charge in the system , so allways put the caps on straight away.
i have had a ghost image on both tubes by fliping unit up to turn off then taking it off head , putting it down - then building lights turned on and it left for not long , it was pointing up , lucky the image faded away after some time but it shows it can happen .

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Good point.

Posted: 11/20/2017 10:44:17 AM EDT

[#6]

Quote History

Quoted:
if you have just been using it and turned it off - then it can be affected by light - there must be some residual charge in the system , so allways put the caps on straight away.
i have had a ghost image on both tubes by fliping unit up to turn off then taking it off head , putting it down - then building lights turned on and it left for not long , it was pointing up , lucky the image faded away after some time but it shows it can happen .

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On American Made Gen 3 this is not the case, as long as your unit is functioning properly a non energized unit cannot be damaged by light.

Posted: 11/20/2017 3:42:38 PM EDT

[#7]

definatley gen3 anvis goggles with itt tubes , perhaps if i had left them a few minutes or even 30 seconds they would have de-energised and it may have been ok but i fliped them up and took them off head and straight away light was turned on and they were laid on the floor pointed upwards for a few minutes - and it happened , i dont think its worth taking the risk , like i said it went away but i was worried when i first saw it

Posted: 11/20/2017 5:41:12 PM EDT

[#8]

Quote History

Quoted:
definatley gen3 anvis goggles with itt tubes , perhaps if i had left them a few minutes or even 30 seconds they would have de-energised and it may have been ok but i fliped them up and took them off head and straight away light was turned on and they were laid on the floor pointed upwards for a few minutes - and it happened , i dont think its worth taking the risk , like i said it went away but i was worried when i first saw it

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Micro channel plate oversaturation

[ARCHIVED THREAD] - Can I get a definitive answer to this noobly question

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