Sensor to Measure Differences in Light Wavelength

[Mark carlyle]

TL;DR Summary

Wavelength period measurement

What sensor to would i use to measure the difference in wave length periods. I want to make a rendered image of somthing that field of view that is being obstructed.

 

[berkeman]

Summary: Wavelength period measurement

What sensor to would i use to measure the difference in wave length periods. I want to make a rendered image of somthing that field of view that is being obstructed.

Can you say more about the application? You can use a spectrometer or similar device to measure the absolute wavelengths and just do a numerical subtraction, I suppose. You can make a simple one with a prism or diffraction grating. Are you familiar with those tools?

https://en.wikipedia.org/wiki/Spectrometer
Also, you posted this question in the Computing forum -- are you hoping to automate this measurement with your computer?

 

[Mark carlyle]

I kinda had a couple different directions I wanted to goin. I do suppose making a 3d environment using a simulator somthing on the lines of a game engine or simplified video format. As for the tools I will look them up and familiarize myself.

 

[DaveC426913]

What sensor to would i use to measure the difference in wave length periods.

How low-tech do you want?
Your eyes do a passable job.

 

[berkeman]

Okay, now I see "rendered image" in your first post in this thread, so having the thread in the Computing forum may make sense.

Your project goals are still not clear though. Exactly what kind of scene or situation do you want to render? What rendering tools have you used so far? Can you show us a few of your renderings that you have done? Use the "Attach Files" button in the lower left of the Edit window to attach images to your posts...

 

[Mark carlyle]

How low-tech do you want?
Your eyes do a passable job.

I was aiming to see through solid material

 

[berkeman]

I was aiming to see through solid material

Like Superman?

 

[Mark carlyle]

I don’t know how I want to do it completely. I’m still in the brainstorming faze. I haven’t decided exzactly which waves I’m going to use yet. But I imagine high frequency radio waves would work. I want to emit a high radio frequency with a sensor measuring the period difference contrast sending the information through an arduino chip or whatever works best to pixilated the differences into different colors creating a 3 dementional view that can see through walls and sold material. I want to create as clear of a picture as possible. I want it to be the best even if someone else has to do it.

 

[berkeman]

Depending on the wall material and the target, you may be able to find some radar frequencies that you can use to image the target through a relatively radar-transparent wall. It's better if you can project x-rays through the wall(s) and pick up the image on the far side.

You can also do a search on "ground penetrating radar" to get more ideas.

 

[Vanadium 50]

Like Superman?

X-ray specs!

 

[Tom.G]

Here is a 12 page paper by researchers at MIT (Massachusetts Institute of Technology) that does it with radio waves. They use a bunch of WiFi hotspots.
https://people.csail.mit.edu/fadel/papers/wivi-paper.pdf
Also try:
https://www.google.com/search?&q=seeing+thru+wallshttps://www.google.com/search?q=see+through+walls+with+wifi