Light intensity input transducers

Can anyone give me a new kind of input transducer specifically for light intensity

KaRyu said:

Can anyone give me a new kind of input transducer specifically for light intensity

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By new kind, do you mean one that works on a different principle than CCD, LDR, or photoelectric effects?

Please tell us what sensors you already have and/or know about, so we won't duplicate that.

John

jpanhalt said:

By new kind, do you mean one that works on a different principle than CCD, LDR, or photoelectric effects?

Please tell us what sensors you already have and/or know about, so we won't duplicate that.

John

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yes, a different principle so long as it uses light intensity.
What I need is a newly invented input transducer. I am currently patent searching for that.

So, you still haven't told us which methods you already know about.

That would be a good place to start.

John

jpanhalt said:

So, you still haven't told us which methods you already know about.

That would be a good place to start.

John

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I only know of photoresistor and phototransistor.
I only need one. I need to study a different light intensity input transducer and then I need to report it in class.

Then look up CCD's (charge coupled device). There are also vacuum tube photomultipliers and photodiodes (same photoelctric principle).

John

i need devices invented in years 2000 to present

I was just trying to help you organize your search. There are three broad classes of devices. Those based on a photoelectric effects, those based on heat (bolometric) and those based on a chemical change (actinometric).

As for any device operating on a completely new principle discovered after 2000, I don't know of any. If you just want a device that was patented after 2000, that is a completely different question. Remember, new principles can't (in theory) be patented. Patents are for inventions, i.e., the reduction to practice of a principle. The underlying principle can be old as the hills.

John