Finding people who can speak towards tech is pretty trivial, and well within your wheelhouse - it's a relational thing.
The broader question is determining which one(s) are the right match for you and your vision.
Here are some steps you can take to filter down to a better set of matches:
The first path is to find "Subject Experts" - these are individuals who have had experience in augmented reality, UI/UX, and the other subtler tech details that make your approach unique. Using this path will help you avoid talking to experts in plumbing about your vision in electrical work. Just good common sense.
Once you've begun to find the general community in your area of focus (a good starting place is StackExchange, btw), then you'll want to hone that in even further. From there, what you're looking for are people who can reflect your vision back to you as accurately or MORE accurately than you can state it yourself.
So, for example, if you were considering a change to the Model-T car back in the early turn of the century, and you had a vision of using a steering wheel instead of a steering stick, then you'd be looking for people who not only say "yes, I like your idea of a wheel" -- but are able to say things like "what I hear you saying is that not only is a stick less intuitive, it actually might have dangers -- since you have to do more thought translation to use it ... oh, and here's a new point you may not have thought about - sticks break more easily than wheels!" In other words, thinkers who GET your idea, can tell you about it, and might even add to it.
Finally, of that specialized group (which may be as small as a handful of people, or even just one) -- you need to pick the people who energize you; standard relational stuff. You can't get into a working "co-founder" relationship with someone who is socially painful, aggressive, or otherwise a drain on your enthusiasm. When you're starting up - sometimes the only thing that makes you move forward is enthusiasm -- and a lumper who bums you out is worse than nobody at all.
Having said all that - I'll make two other unsolicited comments:
1 - you will run into THOUSANDS of "technicians" who believe their job in life is to tell you why something won't work. It's a byproduct of the industry and you shouldn't take it personally. When a tech looks at a new idea, we are usually arriving to solve a problem - so we become trained to call out the problems first so we can fix them.
Well, if you present your new idea, MANY people will just naturally point out its flaws, because we're like that. The best response to most "flaw bashing" is "yes, I've heard that one, I think we have some solutions for it" and then move on. Some people will be bashing because they think it makes them seem smarter - avoid those people, they're a drain ... but the rest will likely say "oh good, well if you can fix that, I think you have a good idea!" Those people are worth continued connection.
2 - Meditate on WHY you're being told to find a Tech co-founder. Who is suggesting this to you? Is it people who are rooting for you, or people who are just politely trying to tell you that you don't know enough tech to do this idea, and before you quit your day job, you should find a tech?
If it's the latter - so what! MANY great ideas have gone forward because a "common user" recognized a need and a tech stepped in to make it happen ... don't be discouraged.
If it's the former - then you're all set! Carry on, and find that nerd who can speak to you in terms that make you feel better about your idea, yourself, and your future!