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Does anyone know where the forum on display calibration and colour analyzers went? It appeared and disappeared relatively quickly about a month or so ago. I was looking forward to learning a few things and am disappointed to see it gone. I thought maybe there was an explanation posted somewhere, but I must have missed it.


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I will admit to causing more than a little trouble on

the quickly removed calibration forum. Things were extremely

one sided. With the release of colorfacts there is now

competition in the calibration field.


And competition is a good thing for the consumer.


Here is a quote from Tom Lianza president of sequel.


"Many organizations use Sequel technology in their products. The important point that I want everyone to understand is that we supply the component, the vendor supplies the art. We manufacture tens of thousands of devices and we are an "enabling" force in the low cost measurement world. Vendors such as Progressive Labs and Sencore are pioneers in this area. They have invested very long hours and dollars in developing the market and products. I'm proud to be associated with them all and I think that this market place is well served by them."


The release of colorfacts has increased the art significantly. And its the first product to support

numerous calibration devices, and is the first product

that does primarys calibration.
 

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Hopefully with the release of Milori's Video Colorfacts there will be enough interest to get a forum like that going!


Regards,


Kam Fung
 

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Kevin,


When will you be selling your calibration head? For how much? At one time you said that it would be much cheaper than the CA-1/AV-1. Is that still true?


TIA,

Phil
 

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The head seem's a little off. It needs to be tilted forward and the shutters opened. http://www.avsforum.com/ubb/wink.gif


By the way will the binocular shutters do a range check to accurately measure Footlamberts?


Kevin,


Incidently, I spent 15 years at AT&T Bell Labs out in Naperville. Isn't wheeling somewhere close by?


Even though I love the California climate, I really miss Chacago. It is easily my favorite major US city, a lot of fond memories growing up around those parts.


Phil
 

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My eyes are open in the picture. Trouble is you take

a 1024 x 768 picture and squeeze it into 64 x 64 and

lots of resolution disappears. And my head has been

off for years. Yes wheeling is about 20 miles north

of naperville. But you can't get there from here because

53 is a parking lot 99% of the time.


Time to spill the beans.


I'm working on two items.


The first item is a single photomultiplier tube. I'm using

a GaAs tube from hammamatsu thats absolutely flat across

the entire visible range, truely a wonderful tube. My

cost with the hi-volt power supply in small quantities

about $550. The other item that goes with this is now

the problem. A spinning diffraction grating. The only

one i can get comes from Perkin Elmer. If they decide

they are willing to sell them to me, they want way

to much.


Now comes another interesting gizzmo. One of the physics

professors here came up with the enabling technology.

Take a scanning chip out of a page scanner. The one

i am using is 5500 points. Put it on a small peltier

element to cool it down so that the noise level decreases.

Now put in front of it this neat little plastic wedge

diffraction grating.


Presto, 5000 point visible spectrometer. And this is much

cheaper than the pmt setup. Also a lot smaller.

But its all surface mount stuff, and prototyping is giving me grief.


And then of course is the faster than light device i

am working on http://www.avsforum.com/ubb/smile.gif



[This message has been edited by kevin gilmore (edited 07-17-2001).]
 

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Kevin,


Just curious - but how do you cool the peltier? I managed to fry two CPUs in my dual processor box due to failing cooling of the peltiers. They essentially became heating elements and I was left with $500 worth of melted metal and plastic.


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/frode
 

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unlike cpu's which generate 2 to 10 watts of heat,

the scanner sensor generates less than .05 watts.

So with just a small heat sink on the other side

of the peltier element, its easy to get the chip down

to about 5 degrees C.
 
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