PLEASE fix the basics!

[Fri13]

Cause it should not get smaller the closer u get. Closer, please don't confuse with zoom.

Like anything behaves is the whole universe:

If i get closer, the object becomes bigger.

 

Yes, that is how it is with your own eyes.

 

But it is not the case with the optics that are there to slow down the light.

 

Take a simple lens, a magnifying glass. If you stick the lens on the subject, it will not be magnifying anything no matter how far or close you look at it.

 

Take the lens further and you start seeing it magnifying more and more, but that as well requires you to start looking further and further the magnifying glass to maximize the magnification effect.

 

Move the lens too far, and it will flip the image around as you are past the nodal point (point where light rays collide) and now you see things upside down.

 

And further you move the lens, more diffraction and spread there is, rendering the image softer and softer, and to compensate for that you need to move yourself further from the lens, that is again fighting against the nodal point range.

 

The sight in Viggen ain't a LCD panel flat on your view. It is behind multiple optics that are causing exactly the element that when you go closer, it gets smaller because you are further from the nodal point. That was the challenge in the viggen to get your eye positioned so you can see the collimator sight correctly.

 

And it required skill to first fly the aiming line on target, then move head to collimator sight correct position and start using it.

 

A very very nice and handy sight system, because you can place one to very small and tight positions. But others opted for large CRT monitors and later complex LCD panels because you can view those from any distance and closer you get, larger it is....

[Vatikus]

That was the challenge in the viggen to get your eye positioned so you can see the collimator sight correctly.

 

And it required skill to first fly the aiming line on target, then move head to collimator sight correct position and start using it.

 

A very very nice and handy sight system, because you can place one to very small and tight positions. But others opted for large CRT monitors and later complex LCD panels because you can view those from any distance and closer you get, larger it is....

Reference regarding challange?

Because the point of this setup, what SAAB calls VID (virtual image display), is that it is easier to use than normal screen when flying low level as vibrations do not effect it as much as it acts similar to HUD. The SAAB promo material advertised it also for the use in AFV (attached pic of CV90) to make it "easier" to see while on the move. Nowhere I ever read that it was pain to use.

Edited July 12, 2018 by Vatikus

[Fri13]

Reference regarding challange?

 

That was in discussions when the Viggen got released and people were confused when they couldn't see the HUD and collimator same time and they could see the square screen when going closer etc. And that IIRC was wrong that it should change the size but just "float" there and you look at it different position if you don't position yourself correctly on it.

 

Because the point of this setup, what SAAB calls VID (virtual image display), is that it is easier to use than normal screen when flying low level as vibrations do not effect it as much as it acts similar to HUD. The SAAB promo material advertised it also for the use in AFV (attached pic of CV90) to make it "easier" to see while on the move. Nowhere I ever read that it was pain to use.

 

 

Yes, if that is the same technology, that is true. Do you know why? Because on the move you do not want to put your eye on anything as you are going around in the hull. That is as well why the gunner sights has big dampeners for the helmet and whole face even so they can squeeze their head in the sight to see it somewhat while on the rough terrain.

 

Collimator changes that as you don't need to support your head on anything and you use one eye on the sight while other eye for something else (you can't use both eyes to look through the sight).

But the LCD panel wins such tech totally, why the optical cameras are turned to digital ones. You don't just get much larger view to look at, but you get as well all angle capability, possibility to maintain better night vision, extra buttons around the screen and other digital functions on the screen as all digital overlays.

 

And that is the benefit of that sight in Viggen, you position yourself for it and then you can look through it with right eye, while with left eye you can look at the radar screen or RWR and around so you don't lose your attitude awareness.

 

But it requires that you are not too left eye dominant so you can use it. Same requirement as example AH-64 Apache pilots using their IHADSS.

[Fri13]

Ok, if it's just a screen behind a lens.... Then the Screen in the DCS behaves wrong.

But maybe it's done like this, cause else you wont see anything in the sim.

 

It is not a CRT screen but a collimator sight.

 

 

That is the principle how it works.

 

The light rays scatter from the source to all directions, in this case the light bulb, but same as any screen etc. The collimator collects the rays and project them all parallel to each other to one direction only.

Such sight doesn't allow you to see it from any other angle than the directly a head as the light doesn't scatter anywhere else.

 

It makes it very simple and easy to build and maintain, tiny and light sight that is possible be positioned to almost anything.

 

It is not a tiny CRT tube screen that you can view from any direction.

 

So if the HUD is positioned so that you see it straight a head 90 degree angle to it, and collimator is positioned 15 degree upwards, you must move your head to the position where their axis cross so you could see both same time.

 

https://forums.eagle.ru/showpost.php?p=2840552&postcount=1

 

There you can get better image of the sight position in the cockpit.

 

But one thing that there should be noted that the collimator sight likely shouldn't change its size at all depending your distance to it. You just should need to position your eye to the line of sight with its projection.

 

So by that in mind, the screen size change likely shouldn't be there as it is not a magnifying glass. It is just very difficult to get correctly done in DCS as it would require to build a "artificial" "hologram" that is placed over the sight screen and visible only when you get your eye on its line.

[Vatikus]

Fri13,

 

 

I think you misunderstood the CRT part... your collimator explaination is OK. The CRT part mentioned in earlier posts goes to the image generation which then collimator lens work with.

 

 

 

SAAB is using EP13 working solution to this day (mostly in AFV applications). However they are now using OLED displays:

http://ir.emagin.com/news-releases/news-release-details/emagin-oleds-enable-saabs-new-virtual-image-display

[MBot]

Now it seems that in VR the EP-13 is simply a regular, fixed display (just like any other MFD or CRT in game). Will this still be adjusted?

[Cobra847]

Now it seems that in VR the EP-13 is simply a regular, fixed display (just like any other MFD or CRT in game). Will this still be adjusted?

 

We are making this into an option. Are you flying in VR or 2D?

[MBot]

We are making this into an option. Are you flying in VR or 2D?

 

Thanks Cobra, that is good to hear. I fly in VR.

[Vannipo]

Pls fix the gear, that it doesn't brake at a smooth takeoff.

Thank u.