Hd video for laser shows - laser burn out cmos

[djtraximus]

Hi I have a JVC GZHD40 which upon filming laser lighting has burnt spots into the CMOS which results in bacteria looking snot things in the image.

Generally this video recorder is crap for laser lighting as it shows color transitions as black waves. I dont film directly the laser output but offset by at least 20 degress.

It is in for repair.

I had the warranty people ring me and they tried to fob off warranty saying that lasers are too bright a light to film.

My case is that so what it is a laser and I am measuring MPEs and your cameras dont even define a brightness or power level. The Sony I had stolen had no problems like the JVC. I was filming a 2000mw RGB.

When I film the 5000mw I will be at least 70M away and 90 Degrees to the beams.

Does any one have a suggested HD video and some filming tips?

I have hundreds of hours filming lasers and I am really disappointed int he JV C.

Links to my video and image archive on my site if anyone is interested.

[weartronics]

I dont film directly the laser output but offset by at least 20 degress.

The energy density on the CCD isn't really affected by the angle of incidence, so aiming the camera away from the projector doesn't offer any protection. If high power beams are entering the lens, they will be focussed on the CCD and it will be damaged.

I had the warranty people ring me and they tried to fob off warranty saying that lasers are too bright a light to film.

I expect the terms of the warranty would exclude such high intensity light. But in practice, the outcome probably depends on how you argue your case more than the terms of the warranty anyway.

My case is that so what it is a laser and I am measuring MPEs and your cameras dont even define a brightness or power level.

If they don't "define a brightness or power level", I doubt they specify the sensitivity either, so how can you measure or calculate the intensity for MPE this way?

Does any one have a suggested HD video and some filming tips?

If you want to record the show from within the projection area, put a tiny sticker on the output window of the projector, corresponding to the camera position. That way the beams will never enter the lens, so you will only record scattered light.

[allthatwhichis]

Depending on your controller/software, some have an attenuation map feature you can use to mask an area for filming or other reasons. I would have assumed you were aware of this feature in Pangolin.

[White-Light]

Yep attenuation mapping is the way to go. Just set up a small exclusion zone around the camera so the beams scan all around but never into into the lens. There are plenty of instructions sets around how to do this if you hunt around.