Film-Tech Forum ARCHIVE: Dp100 Shading

This is topic Dp100 Shading in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=16;t=000266

Posted by Adrian Hauser (Member # 4723) on 10-25-2008, 12:43 AM:

Hi,
Does anyone have any recomendations on tracing a shading error we are seeing out of our 4YO DP100. Essentially the RHS of the projected image seems 'pinker' that the LHS.

We have just replaced the Bulb and also serviced the Water Cooling System.

Notes. The Projector is off centre and Im assuming Lens adjustment is mechanically shifted internally.
Also when looking at a pure white image I can see the shading on the Front of the lens so it is not our Port glass. It looks like the LHS side of the image on the lens has a pink fringe.

Thanks
Adrian

Posted by Pete Naples (Member # 761) on 10-25-2008, 02:57 AM:

The lens may be shifted too far, outwith it's covering circle. You start to see odd things at the edges if that's been done. Some other misalignment in the light path perhaps?

Posted by Mark Gulbrandsen (Member # 72) on 10-25-2008, 09:01 AM:

I'm assuming this problem all of a sudden appeared.... Was this shading there before you changed the lamp? Did you perform the normal xyz lamp adjuatments using the built in indicator via the system software on the TPC? If these adjustments are not done you risk cracking the integrator rod!!! Also be sure to check the system fans for dirt, especially the one below the chassis with the perforated metal covering that is cooling the 90 degree mirror... the perf metal has a tendency to plug up. Also, are all the internal optics and mirrors clean?

Mark

Posted by Adrian Hauser (Member # 4723) on 10-25-2008, 03:26 PM:

Thanks for the suggestions, ill look into it tomorrow.

Will check alignment and cleanliness. That said Im reluctant to do this myself
and will use these responses to forward to our Barco teck.

The problem was there before the new bulb was inserted. Its a very slight
shading that most folks couldnt percieve unless it was pointed out to them.

Adrian

Posted by Adrian Hauser (Member # 4723) on 10-26-2008, 12:49 PM:

Hi Mark,
could you please tell me where the XYZ lamp adjustments are in the TCP software.
I have been through the manuals and cant find what you are describing.

Many thanks
Adrian

Posted by Mark Gulbrandsen (Member # 72) on 10-26-2008, 08:05 PM:

I'll have to pull my laptop out and look where it is on the Communicator software but on the TPC it should be under where you install a new lamp. Its just a series of digits and you adjust the XYZ on the lamp module... usually on the back of the module... where you can see the pressure gauge... for the highest reading on the "meter" on the TPC display. Then the lamp is set up properly for the integrator.

Posted by Adrian Hauser (Member # 4723) on 10-26-2008, 10:26 PM:

Thanks Mark,
When you say TPC are you referring to the Touch Screen Panel on the Projector itself?

I have just found the Xenon Bulb Lamp replacement manual where it describes manual XYZ alignment of the Bulb.

adrian