Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

How I got my laser eye injury

funraniumlabs.com

Post reply on HN
Print view View original

321–330 of 378 posts

Re: How I got my laser eye injury

#321

Post by lupusreal »

gcanyon wrote: post #309
sho wrote: post #287

Earlier quoted context omitted.

It's actually only americans who unaccountably make do with these horribly underpowered kettles. The rest of the world wants their tea and they want it now...

Technology Connections did an excellent video on this: https://www.youtube.com/watch?v=_yMMTVVJI4c tl;dw -- kettles in the U.S. only take about 4+ minutes to boil a liter of water. So when you say "now" you really mean it.

I just nuke a mug of water for a minute or two when I'm making instant coffee. I never understood the big deal about electric kettles.

Re: How I got my laser eye injury

#322

Post by franciscop »

bongodongobob wrote: post #253
franciscop wrote: post #242

Earlier quoted context omitted.

I mean the light shows. Why do you say they are fine? It'd depend on who sets it up, right? If it's professionals I'd be a bit less worried, but in my country and many others def-not-professionals handle things that they shouldn't be handling, including setting up official shows.

Are they building homemade laser rigs or something?

They are buying equipment that is supposed to be pointing to the sky and set up by a professional and setting up haphazardously by themselves.

Re: How I got my laser eye injury

#323

Post by subpub47 »

lupusreal wrote: post #321
gcanyon wrote: post #309

Earlier quoted context omitted.

Technology Connections did an excellent video on this: https://www.youtube.com/watch?v=_yMMTVVJI4c tl;dw -- kettles in the U.S. only take about 4+ minutes to boil a liter of water. So when you say "now" you really mean it.

I just nuke a mug of water for a minute or two when I'm making instant coffee. I never understood the big deal about electric kettles.

Electric kettles make it easy to pour for pour over.

Re: How I got my laser eye injury

#324

Post by swiftcoder »

HeyLaughingBoy wrote: post #110
DannyBee wrote: post #50

Earlier quoted context omitted.

So, to clarify - what i have is a very nice IPG lightweld 1500 XR. They are normally not cheap (30k), and are very nice and well thought out safety wise. One of the fun parts when i lived in the bay area was that as companies got acquired, they didn't know what to do with the stuff they had before acquisition that isn't needed anymore, and it either sits in a warehouse, or gets auctioned off (or both!) So for example…

> plenty of VMC's in the machine shop So now I have to know why Google has a machine shop. Beyond the obvious "why not?"

We had one at the Facebook offices too, as a side-effect of the Oculus acquisition. Hardware prototyping is fun

Re: How I got my laser eye injury

#325

Post by subpub47 »

nayuki wrote: post #274
cwillu wrote: post #247

Earlier quoted context omitted.

‹twitches in metric prefix› 2.5 kilowatts. It's called 2.5 kilowatts. ‹calms down› 2.5 kilowatts is how much power a tea kettle in the UK draws. It's an insane amount of power to pump into a 60 micron point.

60 micrometres. "micron" is a deprecated irregular word that is unlike every other scaling of the metre.

Eh. At least this one is just a name. I don't know how precise we have to be in a blog post, you know? They're the exact same unit.

Re: How I got my laser eye injury

#326

Post by subpub47 »

NathanielBaking wrote: post #61

Safety guys always ruin the fun. I was in the Marine Corps and every time we got to test some new piece of gear the safety officer was like "No, you can't live fire it off the flight deck of the ship" or "No, not here, that village is down wind of the dust you will kick up when it goes off." No, that has a kill distance of 6 miles, you have to fire it into a hill." Blah, blah, blah. So after I got out I joined the Na…

[flagged]

Re: How I got my laser eye injury

#327

Post by swiftcoder »

somat wrote: post #42
relaxing wrote: post #7

Earlier quoted context omitted.

The sales guy set up the entire rig on his own? And no other engineers in the lab stopped to ask what he was doing? I know some places have poor safety culture, but this is a “laser company”. Basic laser safety should be drilled into them from day 1 and every day after. When I worked in an optics lab, we had interlocks on the doors that switched on with the power supply running the experiment and a sign outside indic…

The guy was listed as a "sales engineer" which on first glance is the worst sort of oxymoron, everybody knows engineers make terrible salesmen[1]. But perhaps it could work, just take your sleaziest engineer, put them through an intensive indoctrination in chicanery and lies and you get a salesman who almost knows what he is talking about. 1. How do you know if the guy trying to sell you something is the engineer. Th…

In software we may call them euphemisms like "solutions architects" or "devrel engineers", but sales engineers have always existed. They aren't necessarily the frontline of the sales department, but someone has to go onto the customer site and explain to the customer's engineers exactly how their shiny new purchase is going to integrate into their existing systems and workflows...

Re: How I got my laser eye injury

#328

Post by subpub47 »

pflenker wrote: post #188
madjam002 wrote: post #175

Earlier quoted context omitted.

One of the things I hate most in tourist hotspots these days are the people selling high powered laser pointers, normally selling them to kids, and they are shining it at their faces, in the faces of others, and at the neighbours. I swear they never used to be so commonplace. Having worked nightclub lighting a long time ago I have a deep appreciation for laser safety haha

When I was ~12 years old one boy pinned me down and another one shone a laser pointer in my eye just for fun. Needless to say, this has been my „bad eye“ ever since (I’m 39 now)

[flagged]

Re: How I got my laser eye injury

#329

Post by subpub47 »

NathanielBaking wrote: post #61

Safety guys always ruin the fun. I was in the Marine Corps and every time we got to test some new piece of gear the safety officer was like "No, you can't live fire it off the flight deck of the ship" or "No, not here, that village is down wind of the dust you will kick up when it goes off." No, that has a kill distance of 6 miles, you have to fire it into a hill." Blah, blah, blah. So after I got out I joined the Na…

[flagged]

Re: How I got my laser eye injury

#330

Post by subpub47 »

pflenker wrote: post #188
madjam002 wrote: post #175

Earlier quoted context omitted.

One of the things I hate most in tourist hotspots these days are the people selling high powered laser pointers, normally selling them to kids, and they are shining it at their faces, in the faces of others, and at the neighbours. I swear they never used to be so commonplace. Having worked nightclub lighting a long time ago I have a deep appreciation for laser safety haha

When I was ~12 years old one boy pinned me down and another one shone a laser pointer in my eye just for fun. Needless to say, this has been my „bad eye“ ever since (I’m 39 now)

[flagged]
Post reply on HN