CurtPalme.com Home Theater Forum

[deronmoped]

OK, I went through focusing my 10PG again last night. Now I kinda know what should be seen, but that is the problem, I just kinda know. Here is what I'm getting. In the final image at 960P I can see scan lines on the screen with binoculars when I display the red or green with the other tubes off. The scan lines are easy to see and the gaps between them are quite wide. The gaps are not black with plenty of light spill there.

When I use a focus pattern, I can make out the dots or dashes the letters are made up of. The letters have a scattering of light around them. Now I can adjust the lens focus to get get rid of this scattering of light around the letters, but that also makes it so I can not make out the dots the letters are made up of. Is this normal? I was not sure which I should be shooting for, letters made up of dots or no light scatter around the letters, so what I did was put up a image and adjust the lens focus for each color so as to get the most defined scan line I could.

So what is happening with the lens focus here? When I change the focus I'm focusing on different levels of the phosphor, the glass or? I know when the beam hits the phosphor the light comes off in a scattered pattern, also I guessing that there is going to be a scattering of electrons around the dot, but you would think that I would not be able to focus them out, that they would be at the same level as the dot.

Overall the image looks excellent, with plenty of room for 1080P, but it could look better if I could get the acutance increased.

http://en.wikipedia.org/wiki/Sharpness_(visual)

For some reason the link will not work, copy and paste the "whole" line above to get to the page that shows you are real good example of edge enhancement.

Deron.

[David_Web]

I say that the image will just look artificial if you increase acutance. But that's just me.

[tse]

That's also part of the reason why digital displays appear sharp like they do. The dark border around the individual pixels.

Scott

[deronmoped]

David

Maybe that is one of the reasons why I do not like digital images, the acutance is so great. I believe that the better CRT's have a higher acutance. They get there by having better control over electron scatter around the dot and ability to turn on and off the beam quicker.

tse

Yeah, they look like they have too much unsharp masking applied to them. I hear that some digital guys defocus the PJ to try too undo some of it.

Deron.