It could be any number of problems, but since you just got it you should be able to contact Sanwu and get them involved. Do you have a DMM that you can use to measure the voltage on your batteries? I would start there as a bad cell could cause this. Podo is the user name of the Sanwu rep here on...
Look, you are never going to have a laser strike your goggles for 5 seconds. They are there to protect your eyes from a very temporary strike. If you stand there and look into a beam for 5 seconds you deserve to lose your vision.
That is very unusual as the splash is not concentric with the beam profile. The spot looks very good.......Gaussian. I would look into masking the beam as that should eliminate any splash you are getting from reflections behind the lens.
That's great. I knew you'd get one eventually. I would look into driving the 530nm laser at a lower current level. You likely don't need that much exposure. But, green is much more visible to our eyes than red, so you will still see more light even when you get it down to 10 mW.
Either one would give you over 5 amps of current for an hour, so it really matters little. I suspect one is a protected cell and the other isn't.
The unprotected cell will have a higher drain current, but the protected cell can't be over-discharged.
This is a do-it-yourself meter and you will need some known laser sources for calibration if you decide to go this way. I would want to know much more about it before I would even consider this as viable.
I have found the judicious use of beam stops and light blocks to work best for this problem. If you take time to block it from reaching your plate you might not need to do it every time you shoot a hologram. It can be time consuming, but worth it.
Wow. Usually these intro threads are filled with information about the new member, not a rant about how they were screwed. Where are you from and how old are you? I am not familiar with the 202 designation from laser pointer stores, so I have no idea what you are talking about. Welcome to the...
Huh. I missed all that. I am not on all the time, but do come on from time to time to see if there is any activity. The upgrade must have taken very little time as I am usually not on for a few hours at most.
I had some silver certificates too. Any that were still in circulation today would have to be very rough. Yeah, back in the 1960s everyone was saving silver coins. My mother had a large collection starting the day it was announced that they would be discontinued. I wonder what ever happened to...