hi ,
i have a coulple of optical mouse are they any components i can extract and make use of ?
Yes.
yes!
hmm i wouls feel better if u meantion the names
i know we get encoders from ball mose but i dont know what parts we get from an optival mouse !
except for led and pushbuttons 
So what you are saying is that your original post should have said:-
Does any one know what parts you can usefully reuse on an optical mouse apart from the obvious switches and LEDs.
For the record I don't know but I am sure someone would have pulled out the chip and used it as a crude camera.
Yes, I have.
I left most of the mouse internals intact and just talked to the controller chip in there.
The idea was to read our electricity meter dial to measure the usage.
Unfortunately the distance from the protecting plastic front to the actual dial was to large for the optical sensor to focus.
yeah grumpy mike i found such project though i have no use of it
in case u'd like to have a look
http://spritesmods.com/?art=mouseeye
i wish i could exchange these for the older ones 
Some of the "wheels" on optical mice are still mechanical encoders. See also http://www.instructables.com/id/Take-apart-an-optical-mouse/
oh!
ill pull out one and check
The other day I took apart an Apple wireless Mighty Mouse, and found a laser sensor assembly in there — an ADNS-7050 set. Quite a sophisticated system.
Conventional optical mouse chips are only about 18 x 18 pixels, so not really a lot of use as a camera, but potentially quite useful as a surface movement sensor. For example, on the new HTC phones, there's a button on the front that is actually like an upside-down optical mouse sensor, which senses which way your finger is rubbing it (if indeed it is rubbing it).
chips are only about 18 x 18 pixels, so not really a lot of use as a camera,
More than enough if you want to do a camera to LED matrix project. It fact it is too much resolution.