And what you would see if you put your eye there is a very bright light, not an image.

 

Are you allowed to use a smart phone to view the image?
If yes, then it opens a number of possibilities.

 

And what you would see if you put your eye there is a very bright light, not an image.

Light source >>>> [focus somewhere in the path] >>>>> nitid image >>>>>>individual reader.

 

What is a nitid image?

 

What is a nitid image?

Sharp / clear
Properly edited Bob (nítida in Spanish).

 

And what you would see if you put your eye there is a very bright light, not an image.

no no, maybe I didn't explain myself well (damn translation), what I did is an experiment at home to see if there are lenses to narrow a beam of light, and they are the same lenses as my binoculars, so what I wanted to look for there 'I found, now I want to know what these lenses are called, and how can I make a way to focus the image on the eye

 

Are you allowed to use a smart phone to view the image?
If yes, then it opens a number of possibilities.

I repeat the smartphone I used it for the flashlight, I do not know what you mean but the viewer who has to receive the projection must not have any eyes, in his hand, anywhere, he must be as if he were at the cinema maybe you mean the viewers like those google (cardboard) who use a smartphone? if yes then it's okay because in this case I would have the smartphone in my hand and with a series of optics I can get the beam to the viewer's eye

 

Light source >>>> [focus somewhere in the path] >>>>> nitid image >>>>>>individual reader.

I don't know what your comment means but usually the focus lens fits at the end of the path, but it depends on the distance between the light source and the eye and other factors

 

Here’s an article that describes the lens system for binoculars. You might find it helpful.

Note that any solution using lenses as in binoculars requires that the person seeing the projection remain in one location and his eyes also must be in pretty much the same position.

Is this a problem?

 

Here’s an article that describes the lens system for binoculars. You might find it helpful.

Note that any solution using lenses as in binoculars requires that the person seeing the projection remain in one location and his eyes also must be in pretty much the same position.

Is this a problem?

yes yes i know the person has to stay still and it's not a problem, so i will read your link on the binoculars lenses, i hope it can work, also which projector do you recommend? obviously it must be suitable for the solution must be about 1 meter away from the person so something not bulky, please help me because I want to finish this project as soon as possible

 

so after having recommended the projector, could you tell me, if the optics is fine or should I add a focus lens?

 

also I am a bit confused in the arrangement of the lenses, because the instruments will be inserted according to this order 1 projector 2 lens to narrow the beam 3 reflector, according to the windshield technology proposed by bob 4 focus lens 5 eyes. In your opinion it's okay, I try to follow the examples of smart glasses and movie projectors

 

Just my opinion but have you ever used binoculars? Yes the image gets smaller when they are revesed but the lenses also have to be very near the eye.

You have never gave the reason for what your trying to do. If it is just to keep one student focused on something and not disrupting the one sitting next to him, there are blinders that can do this. They are used in pilot training for instrument flying, called IFR training. Just one place that sells them to illustrate - https://www.pilotmall.com/collections/suggested-view-limiting-devices

 

This is also used to to limit your field.

Cheap or very expensive depending of the model.

 

Just my opinion but have you ever used binoculars? Yes the image gets smaller when they are revesed but the lenses also have to be very near the eye.

You have never gave the reason for what your trying to do. If it is just to keep one student focused on something and not disrupting the one sitting next to him, there are blinders that can do this. They are used in pilot training for instrument flying, called IFR training. Just one place that sells them to illustrate - https://www.pilotmall.com/collections/suggested-view-limiting-devices

I have already explained this many times, I need to have images projected at a distance of one meter from the person, so now you are telling me that using lenses like those of binoculars, viewers will not be able to see the images? how can i solve? perhaps with lenses that can focus at that distance and with the addition of a collimator to reduce the diffusion that is created at that distance?

 

This is also used to to limit your field.

Cheap or very expensive depending of the model.

View attachment 270935

hahaha you always make me smile, however the project is serious and we are almost at the end

 

I have already explained this many times, I need to have images projected at a distance of one meter from the person,

Maybe you think you have, because you know the reason. But to someone like me that can't know what is in your mind it makes no sense.

 

I have already explained this many times, I need to have images projected at a distance of one meter from the person,

Yes, you have. But your description is still incomplete. For example, what is the source of the image and what is its size?

To calculate the lenses required, you need to know that information to calculate the projection ratio. Basically, as I understand your problem, you need to project an image of unknown size onto a “screen” of about 0.1” at a distance of 3.28’.

I estimated the screen size at approximately the size of your pupil on your eye. That’s a tiny screen and misalignment of 1 tenth of an inch would not allow the image to be seen. Your viewer must have a very steady head.

Theoretically, perhaps an holographic image might be better, as it’s visible over a broad range of viewing angles. But your “screen” still would have to be small in order to prevent nearby people to see it. Maybe you could get away with 1”… But I am not familiar with holography.

 

Your viewer must have a very steady head.

That is the statue I mentioned already.

 

Maybe you think you have, because you know the reason. But to someone like me that can't know what is in your mind it makes no sense.

yes of course I respect the opinions of other people, but from my point of view this projector has nothing dangerous or useless, but rather it is an educational way and to bring children closer to school