UVPROM Camera

[Ned G7WJK]

Several years ago I saw an article in a magazine where a UVPROM was used as the active optical element in a TV camera. The address lines were used in order to scan the picture lines.
Unfortunately I no longer have the magazine.
I realise that cameras are now cheap and easy to get hold of, but it seems an interesting project. Does anyone know how this is done, or can anyone please point me to the right website.

Thanks

Ned

 

[dougy83]

Sounds a little unlikely. I don't think PROMs act particularaly quickly in response to light; that's why it takes hours/weeks/years to erase one (change the bit states) in ambient light (e.g. inside an office).

I'm guessing that the article you saw involved DRAM, which just needs a lens and a data interface to form a camera.

 

[crutschow]

In either case the output is a digital bit for each memory location (pixel). The picture detail would be black or white, no gray-scale.

 

[Brevor]

Yeah,I remember that article many years ago in Circuit Cellar magazine. It was indeed a UV eprom used to capture the image. They used a lens to focus the image on the quartz window. Thats about all I remember because I didnt read the whole article. Circuit Cellar has a website where you can purchase articles online all the way back to issue No. 1. Try looking there. I think its
Circuit Cellar - The Magazine for Computer Applications

 

[Ned G7WJK]

Hi Guys
Many thanks for your thoughts on the subject. I can't find any trace on the Circuit Cellar site. There is an article on camera chips dated July 1999, but if memory serves me right ( and it often doesn't) the article I originally read about it was even further back in time.

Ned