ISO: Phosphor tester for IR?

Radio Shack used to have 'em, part number 276-0099, if that helps.

Cheers, James Arthur

I got mine at Radio Shack. They're pretty common... google 'ir test card'

Most digital cameras will see near IR, 850 nm for sure... they often image as purple. I don't know about longwave, 1310 or 1550, but led's are usually close to visible.

Are you doing fiber or free space? What wavelength?

John

There are two basic IR to visible systems. One absorbs pairs of photons between 940 nm and 980 nm and releases that energy around 525 nm (green). This system will not work with 880 nm IRLEDs, but does pretty well with the 940 nm and

The other system involves a phosphor that you charge up with visible light and discharge with IR energy over a broad range of wavelengths.

Google [ir indicator]

Hi, all:-

ISTR some little cards or something like that which would glow green(?) when exposed to IR light from an IR LED.

Are available easily these days?

I want to give something to techs checking out high speed IR connections in the field.

Best regards, Spehro Pefhany

John Larkin wrote in news: snipped-for-privacy@4ax.com:

How about something like:

They're using a camcorder now. I'd like something more convenient. ;-)

Both, and not sure.

Best regards, Spehro Pefhany

That is a silicon sensor (photo diode or transistor) in a filter package (epoxy with a visible blocking filter that passes near infrared), with a simple linear amplifier driving a green LED. The detector is essentially the same as the kind the remote normally communicates with.