Old 11-08-2017, 04:00 PM #17
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Hi, thanks guys but please don't waste to much time on this. I've already send the thing back and they've confirmed receipt but no explanation and agreed to test and send a replacement. I paid on visa card as well so it could be a lot worse. Just wary after a few things i've read about the company but i'll do a full review myself and post the outcome of the replacement as well.

@lasersbee I didn't think wise to take apart. Pen style laser with a glued gold top and I didn't want to scratch the gold off by forcing it with pliars and have a return refused. If it was the lens physically moving somehow I would have liked to think the tapping against desk test I did would have had a reaction. Yet strange how pressing the power button hard vs soft at different angles and turning battery cap tight vs loose caused so much fluctuation in not only the beam strength but also the quality even while the pen was held steady. It could do bright or dull, with or without the splash just by turning the cap or gently manipulating the button. Shaking or tapping had no effect. This is where I just shrugged there is something up with it and gave up.

@BowtieGuy The beam was as straight as a arrow which is the only reason I spent so much time faffing about trying to work out the problem. Hopefully I get a better one next time otherwise I get my money back and put it towards a blue which I see come a lot more powerful without so many lies and less likely to be ripped off on.

Matt


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Old 11-08-2017, 04:02 PM #18
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Default Re: New member from UK

mattydc, how did you find the forum, googling laser pointer?
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3
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Old 11-08-2017, 04:28 PM #19
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Default Re: New member from UK

Welcome and enjoy and be safe. There's always room for another laser Hobbyist.

Here's s couple of good/trustworthy company you can take a grander at;

https://www.jetlasers.org/

https://www.sanwulasers.org/

There are more, but it's start.
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Old 11-08-2017, 04:31 PM #20
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Default Re: New member from UK

Hi
Welcome to LPF many great people here enjoy and be safe

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Old 11-08-2017, 05:24 PM #21
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@Alaskan Yes that's right. I've been lurking around for a while but only started really reading up when I decided to make another laser purchase - my main hobby is amateur radio/scanning and that's where I spend most of the small hobby money I have. May I ask what those links in your signature mean about being verified? They don't load up for me and while I would be happy to be verified I find the donation offer situation a little unusual. Please explain this and what it entails. And thank you to everyone else who has helped/welcomed with my little problem. I will post a review on my purchase in the companies forum shortly for members benefit.

One thing I would like to ask is - there is a direct link to laserpointerstore from this site. This is a site I looked into buying from and contacted/had a response but they have suddenly decided 200mw+ green lasers are unstable and removed from store. Is this a good place to purchase a blue 445 from? I've read problems about a LPM and a guy called Tommy claiming incorrect specs from this store. If this is his store is it good for a blue laser and if he has claimed incorrect specs why does he have a link from the main page? Just trying to get my head around the many scams that seem to be rife in this hobby... Thanks

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Old 11-08-2017, 05:51 PM #22
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Default Re: New member from UK

Good point! If you are going to be a regular contributing member here, joining the club, so to speak, my signature says it all.

Edit: I moved the mention of being willing to donate more for the help vetting new members out of my signature, explaining it in the vet section. Come to think of it, non-vets don't need to see that, they haven't been here long enough to understand.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions: - https://laserpointerforums.com/f37


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Relative Brightness vs Wavelength Calc: https://tinyurl.com/RHD-brightness

High Current Pulse Diode Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 11-08-2017 at 06:19 PM.
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