Optical Fibre Component

Hmmmm sounds and looks like an extension for an infrared temperature sensor...

The ruby would be used for good transmission of infrared... the others might be used for higher temperature sensing...

How long are the fibre cables?

John.

the cables are about 1850mm long (each) or 6' . Thanx, it makes sence, comming out of a steel furnace perhaps seeing that I got them from an old steel factory. There are a few "dead" fibers and that is probably why they were removed from duty. I would like to try to cut the front end of (where the ruby is) in order for them to let more light through. But how to know how deep to cut without damaging either the ruby nor the fiber ends??? Or should I leave them as they are? What can I do with them, would be a pity to have them lying around... Maybe I can build one into a reflector (dish) to focus the sun into the lens and use it to get natural light into my dark and gloomy hallway...

"There are a few "dead" fibers" indicates that you can tell that there are several or many fibers. If there are many, it may well be a low-resolution infra-red imaging fiber bundle (appropriate optics would allow a camera or person at one end to observe or record an image at the other end - as in checking the uniformity of temperature over a region, without the observer being subjected to the direct heat of the oven or furnace). An imaging bundle has all the fibers kept in the same relative positions from one end to the other, as opposed to a much cheaper bundle where the fibers are not kept arranged from one end to the other. The latter will carry light, but not image information.

That looks like the Fiber Optic used in Wikerson infared temperature sensor device. The ruby red end goes into the temperature reading device, and the other end is mounted to take the actual reading of the temperature. I used to work with one of those in an Induction Welding Machine where the welding process is controlled by these temperature device. The newer model of the sensor also can put a laser LED throught the fiber to "aim" the fiber optic so that the point of measurement can be "seem" by the setup person.

Just a note: the fiber optic cost over $1,000 to purchase by the company where I work.

MidniteFighter

Thanks MidniteFighter for your input. Very interesting.Now I know what these are and know how to advertize if I wanted to sell.. Do you think $350 each or $1500 for the lot is ok?

What about the ones without te ruby? were they also used in those welding machines?

I agree, possibly a low thermal imaging bundle...?

I would suspect they could be quite valuable to the right person...

Try them on ebay, its a cheap way of finding out what people will pay for something and I've had surprises on there when selling a box of junk for 99 pence and it ended up at £80!!

John.

They are used for infrared temperature measurement. The glass lens focuses on a black body (usually at the end of a measurement tube or well ) the small red (filter) lens end attaches to the pyrometer. They are not cheap to by but are easily damaged so as to no longer be useful for their intended purpose.