CurtPalme.com Home Theater Forum

[Moe Adham]

Hello,

I am currently working on a color project using Raster-scanned laser projectors (similar to this: http://www.microvision.com/pico_projector_displays/index.html)

I need a method to rather accurately measure the color drift as the lasers heat up, and their wavelengths begin to shift.

Ideally, a high-resolution spectroradiometer would be used, but I am on a rather tight budget. While the i1Pro is affordable, lasers tend to shift 1-7nm, so the 5nm resolution seems concerning.

Would anyone suggest a means to use a lower-cost sensor? My major concern with regard to normal colorimeters are the filters used. Given the highly monochromatic light from the lasers, I am not sure how the colormeters integrate the light, or the bandwidth of the filters on the sensors. I currently use a Cambridge ColorCAL with a Minolta Sensor, but I have little confidence in the data is is giving me.

It looks like laser projectors are going to be here quite soon, and it might make calibrator's jobs a lot more difficult, as low light levels are very hard to control with laser projectors due to the moving threshold voltages.

If anyone has any novel insight on the topic, or has any questions, please feel free to ask.

Thanks!

[kal]

If laser drift is only 1-7 nm, I'd say even the 1nm resolution of some higher end spectro's is concerning.

How tight is your budget? $100? $1000? $10000?

Kal

[kal]

If laser drift is only 1-7 nm, I'd say even the 1nm resolution of some higher end spectro's is concerning.

How tight is your budget? $100? $1000? $10000?

Kal

[Spanky Ham]

I think an i1 Pro is 10nm not 5nm.

Your best bet might be to talk to someone with a Photo Research spectro and see if you can rent it. You might also want to talk to Spectracal and see if they will rent you a high end instrument.