Re: auto darkening welding helmet?

[SenKat]

Re: auto darkening welding helmet?

BAD IDEA !

Your pupils dialate, and you smoke your eye sockets that way ONLy use protective eyewear designed for lasers at the specific wavelength you are testing.

 

[laserrod]

Re: auto darkening welding helmet?

I wouldn't trust electronics to switch on the blanking tint and lasers beams are a different
animal all together.

My $40 sport LASER safty shades(GRN blocking) are auto darking. (NOVA brand,NOIR make)

Because the brighter the LASER the dimmer the spot.
Example:
20mw goes through the lens and makes a dim green spot on white BUT, 40mW makes no spot!

Be safe and cool, GET REAL LASER GOGGLES or do complete scientific testing before risking you PEEPS.

Cheers

 

[AJ_Dual]

Re: auto darkening welding helmet?

Bigger than the pupil diliation issue is that a laser beam could go through the eye window and completely miss the photocell sensor on the mask that darkens the LCD panel sandwiched inside it.

I think some cheaper ones just power/activate the LCD shutter directly with a solar cell, and the light given off by the welding being done in front of it powers it directly.

 

[Benm]

Re: auto darkening welding helmet?

Are those welding helmets electronically operated?

I've seen some sunglasses that work passively, where a dye is tinted due to light so they get darker with increasing brightness.

In any case, i wouldn't trust them as laser shades at all. Even if they respond well to laser light, who says its fast enough?

 

[pullbangdead]

Re: auto darkening welding helmet?

Are those welding helmets electronically operated?

I've seen some sunglasses that work passively, where a dye is tinted due to light so they get darker with increasing brightness.

In any case, i wouldn't trust them as laser shades at all. Even if they respond well to laser light, who says its fast enough?

I don't know about welding shields, but eyeglasses work through chemistry (silver chloride or similar in glass lenses, organics in plastic lenses I think), and they actually darken due to the UV light being absorbed from the sun. It's quite a slow process, so I don't imagine it's what's used in welding, but I could be wrong.

Either way, I agree that I don't see either technology working very well, especially since laser goggles are so relatively inexpensive and proven effective anyway.