Hmm. You do have a problem. I had a similar thing happen to me and luckily, after I bought a new drive the discs were readable again. It was a Pioneer that wouldn't read them and that had burned them too. the NEC/SONY one I have now reads them.
Anyway that doesn't help.
I would normally be able to recommend one or two programs that would get the data for you but, having the problem that the discs are not even showing up as containing anything at all is going to be the thing that makes just about every windows program fail nomatter what they claim about recovering files from discs that are damaged. Believe me, I tried!
So I can only think of one thing really. Just incase it is a windows specific symptom, ie. the discs are not recognised in explorer but might be under a different environment,
I would suggest you try accessing the drive with something else. There are some linux programs that can be run directly from a boot disk and work as file explorers etc where you can access files, copy, delete etc just like in windows, or more like in DOS.
Offhand I can think of one called volkov Commander as I remember using it a while back for something similar but there are lots more options I am sure.
....gogle searches later...
I found the exact thing I used myself..
and downkload the PRO version.
Then you need to burn this to a disc ok.
Then you boot the PC with the disc in place, making sure you changhed the PC bios settings to allow to boot from the Disc Drive first, then it is all pretty simple from there. the progream starts and asks you what you want to run. try out a few of the utilities on it and see if any of them can do what you want.
By the way, if you only have the one disc drive, as the program runs and loads each utility from the disc as needed, make sure to start the utility you want to try first and when it is running, then eject the disc and put in your dodgy photos disc.
Best of luck mate!
Oh if you want to read more info about the Emergency boot disc check the main page here