✅ SOLVED Is it a lens?

[AtrumVorago]

I was wondering if any one can give me any info about what this could be. Thinking it is a lens. Any help is greatly appreciated. The lens is 7 5/8" in diameter, 1 9/16" thick. It is flat on one side, and the other side is concave. That you again.

 

[capt-zero]

We had a magnifier like that on one of my tugboats early radar screen. It was mounted on a hood which fitted over the actual screen. Radar unit from the late '50s. I'm not sure if that is what yours was used for, but possibly some similar use.

 

[AtrumVorago]

Forgot to mention, there is writing on the flat side if the lens. Looks like maybe names. Can not reads them that well.

 

[Paleopilot]

I was wondering if any one can give me any info about what this could be. Thinking it is a lens. Any help is greatly appreciated. The lens is 7 5/8" in diameter, 1 9/16" thick. It is flat on one side, and the other side is concave. That you again.

Not sure if it's a lens from a large projection tv or not, but it sure is similar. They all had three "guns", one for each primary color.

 

[bradyboy]

dose it magnify?
Brady

 

[AtrumVorago]

dose it magnify?
Brady

It makes things smaller, like a fish eye lens and like the passenger mirror on a car.

 

[AtrumVorago]

Thank you to all that helped. It is a neat find. Any other help would be greatly appreciated.

 

[skeeterd]

Does it make things smaller when you look through it from both directions?

 

[AtrumVorago]

Yes it does.

 

[Paleopilot]

Shine a light through it and see what happens. If it is part of a RT assembly there would have been another lens underneath it. See what it does to a flashlight beam.

 

[AtrumVorago]

I am sorry, but I am not sure what a RT assembly is. Can you explain what that is? Thank you.

 

[Paleopilot]

I am sorry, but I am not sure what a RT assembly is. Can you explain what that is? Thank you.

I just posted a couple pics in the last post. This one is from a 55 inch Mitsubishi, makes a good loup. Oh sorry, RT or CRT, Cathode Ray Tube.

 

[AtrumVorago]

Shined a light though the lens and there was no change to the light. The lens reduces the image, the farther you move it away from the object. It has writing on the flat side: Briviel, Junoc - Ward, Zemett, (unable to make out). The others may be wrong also. Here is a picture of what the lens does:

 

[Paleopilot]

Shined a light though the lens and there was no change to the light. The lens reduces the image, the farther you move it away from the object. It has writing on the flat side: Briviel, Junoc - Ward, Zemett, (unable to make out). The others may be wrong also. Here is a picture of what the lens does:

View attachment 716629

Very cool! If you were to mount two of them with the option of focus, moving them apart or together you would probably have a telescope. You have half of a magnifying glass I think.

 

[AtrumVorago]

Thank you PaleoPilot. I appreciate your help. Merry Christmas to you and your family.

 

[nhbenz]

Great Picture!

 

[TimC]

Maybe a reflecting telescope mirror before it is silvered.

 

[AtrumVorago]

Thank you TimC, and all who helped.

 

[cw0909]

i think it is a Uncoated Plano-Convex lens,yours is big maybe used for a cutting laser


Uncoated Plano-Convex (PCX) Lenses | Edmund Optics