HP150 Touchscreen diagnostic

20 Jan 2011

...

   3) I am not sure my video camera has much sensitivity
in the IR. It
depends  on which vidicon is fitted, I think.

 Yes, stupid of me I should have known, mea culpa ;-)  
 I cna't beelive you've forgotten my taste for older devices :-)

 What do you mean, "older"? Vidicons are modern. Iconoscopes and image
 orthicons are "older". 
No, 'Old' = Nipkow disk and photomultiplier :-)

I siad 'older', not 'oldest' :-). I think the vidicon is older than the 
CCD/Reticon/other IC-like image sensors. Of course I'd like an image 
orthicon based camera, but there';s little chance of me getting one. Or 
finding the space for an iconoscope...

My video camears are, alas, modern enough to use transistors, and most of 
them, inclduing the colour [1] one, even use ICs... 

[1] 3 separete vidicon tubes and a dichroic prism assembly, of course. 

-tony

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HP150 Touchscreen diagnostic