Build a Periscope - Get Help Now!

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A user is seeking assistance in building a small periscope with two input oculars and one output ocular. Key questions raised include the required wavelength for operation, the intended application, and whether the device is bi-directional. Additional inquiries focus on the necessary focal lengths and the physical dimensions of the periscope. The discussion encourages sharing existing solutions and reasons for their inapplicability. Clear answers to these questions will help guide the user in their project.
ChinToka
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Hi everyone!

Maybe i am in the wrong section, if so please put this where it belongs.

I am trying to built a very smal kind of periscope with two input oculars and one output ocular.
It should look like this:

unbenannt4nurx.jpg


I would really appreciate if someone can help me with this, thanks!
 
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It might help if you ask a question (specific or general) that someone can respond to.
 
First we need some answers so we can work out what help you need.

At what wavelength, or over what band of light will the periscope be required to operate ?

What is the application for this periscope ?
It appears to have three ocular lenses. Is the device bi-directional like part of a laser range finder ?
What external range of focal lengths do you require ?
What is the physical scale of the device ?

Do you know of any existing solutions to the problem ?
Why are those solutions not applicable ?
 

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