canon rumors FORUM

Rumors => EOS Bodies => Topic started by: Canon Rumors on July 20, 2010, 04:41:16 PM

Title: Lasers Can Damage Your Sensor
Post by: Canon Rumors on July 20, 2010, 04:41:16 PM

Lasers can damage your Canon HDSLR camera’s CMOS sensor

An interesting story on Planet5D in regards to CMOS sensors and laser lighting.


Lasers used in a light show have damaged a Canon EOS 5D Mark II CMOS sensor and I sure didn’t know it was possible, but I thought I’d get a warning out since it appears to have damaged this guy’s sensor.


Check out the video at Planet5D.


Read More: http://blog.planet5d.com/


cr



Title: Re: Lasers Can Damage Your Sensor
Post by: Jan on July 20, 2010, 06:34:13 PM
Wow... I didn't think this could happen. I'm still wondering if the pixels are really damaged or only temporarily out of order...
Title: Re: Lasers Can Damage Your Sensor
Post by: deeznuts on July 20, 2010, 06:42:26 PM
Were the lasers attached to sharks?
Title: Re: Lasers Can Damage Your Sensor
Post by: Canon Rumors on July 20, 2010, 07:29:51 PM
Were the lasers attached to sharks?

Hah
Title: Re: Lasers Can Damage Your Sensor
Post by: aviator.4.life on July 20, 2010, 11:30:06 PM
Wow thanks for the heads up.
Title: Re: Lasers Can Damage Your Sensor
Post by: Kedest on July 21, 2010, 03:22:04 AM
Aren't they dangerous to the human eye too then?
Title: Re: Lasers Can Damage Your Sensor
Post by: Grendel on July 21, 2010, 02:07:34 PM
Aren't they dangerous to the human eye too then?
Yes. But the amount of energy that can cause damage to a CMOS sensor may still be below the danger level of retina damage. Also, the eye is capable to repair minor damage to the retina. Personally I would play it save and stay away from these laser systems w/o proper protection (esp. since my eyes are already pretty bad..)
Title: Re: Lasers Can Damage Your Sensor
Post by: Jaszek on July 22, 2010, 04:24:11 PM
and there I am wanting to shoot a laser show. lol
Title: Re: Lasers Can Damage Your Sensor
Post by: that1guy on August 11, 2010, 01:59:30 AM
Were the lasers attached to sharks?

Freakin' sharks  ;D
Title: Re: Lasers Can Damage Your Sensor
Post by: DetlevCM on August 16, 2010, 04:21:00 AM
This is something I am quite curious about:

1) I beleive a laser can damage a sensor - the light will induce a current of some sort - else the sensor couldn't register the light - and I'd guess that fried something.

But 2) - there was discussion about this on Photography on the Net where people claimed it couldn't happen. (And yes they saw the video and deemed it "inconclusive")

I suppose if someoe with actual knowledge on sensor design could chip in it would be great.

I do like physics, but I am a maths student - not a physicist or engineer.
Title: Re: Lasers Can Damage Your Sensor
Post by: samthefish on August 16, 2012, 04:47:48 PM
http://www.laserist.org/camera-sensor-damage.htm (http://www.laserist.org/camera-sensor-damage.htm)

Title: Re: Lasers Can Damage Your Sensor
Post by: victorwol on August 16, 2012, 06:50:16 PM
Wow... I didn't think this could happen. I'm still wondering if the pixels are really damaged or only temporarily out of order...

Total damage, fried. Think that a laser can perforate a paper, so I'm not surprised can kill pixels on a sensor....

http://m.youtube.com/watch?v=WlnzcZj_rqU (http://m.youtube.com/watch?v=WlnzcZj_rqU)
Title: Re: Lasers Can Damage Your Sensor
Post by: marekjoz on August 16, 2012, 07:31:56 PM
Interesting, that there is not even a single word about it in any Canon's SLR manual. There is about exposing to heat, leaving in a car, observing the correct battery charging, sun etc but nothing about laser projectors. I don't think it's well broadcasted information. Interesting again, if Canon honors warranty in case of such a damage?
Title: Re: Lasers Can Damage Your Sensor
Post by: bdunbar79 on August 16, 2012, 07:50:23 PM
Wow... I didn't think this could happen. I'm still wondering if the pixels are really damaged or only temporarily out of order...

Total damage, fried. Think that a laser can perforate a paper, so I'm not surprised can kill pixels on a sensor....

http://m.youtube.com/watch?v=WlnzcZj_rqU (http://m.youtube.com/watch?v=WlnzcZj_rqU)

Totally depends on the wavelength of the laser, the amplitude, and the phase.  I've seen 800nm wavelength lasers sear through paper but 400nm do nothing but reflect, because the amplitude and power (wattage) weren't there.  Again, it totally depends.  Some lasers bounce off paper while others cut through metal.  One common misconception is that a laser is something special, when it is nothing but light, that we see everyday.  The ONLY difference is that the waves or photos are all in-phase, vs. random phase by normal light.  You can have radio wave lasers, light wave lasers, X-ray lasers, etc.  It's an electro-magnetic field like any other.

I'm guesing the problem with the sensor is too much of one thing, it cannot be handled.
Title: Re: Lasers Can Damage Your Sensor
Post by: AAPhotog on August 16, 2012, 08:14:58 PM
This has been known about for quite sometime. I believe it has to be in liveview as well when the laser hits it.

Im just curious how canon would handle a warranty repair on such instance as there is certainly no warnings from them about the possibility of this happening. So would it be user area and no free fix/replacement from canon?
Title: Re: Lasers Can Damage Your Sensor
Post by: Drizzt321 on August 17, 2012, 12:29:31 PM
This has been known about for quite sometime. I believe it has to be in liveview as well when the laser hits it.

Im just curious how canon would handle a warranty repair on such instance as there is certainly no warnings from them about the possibility of this happening. So would it be user area and no free fix/replacement from canon?

Well, I'd rather that than hitting my eye. Concentrating that energy even further through a lens could be very damaging to your eyesight!

Also, I imagine it doesn't matter if it's in liveview or not, as long as it hits the sensor and it's the right intensity/etc.
Title: Re: Lasers Can Damage Your Sensor
Post by: Mt Spokane Photography on August 17, 2012, 03:25:49 PM
This has been known about for quite sometime. I believe it has to be in liveview as well when the laser hits it.

Im just curious how canon would handle a warranty repair on such instance as there is certainly no warnings from them about the possibility of this happening. So would it be user area and no free fix/replacement from canon?

Yes, the topic is two years old, and someone just now resructed it.  Maybe CR should lock all the old topics?