Designing Immersive Display Setup
Designing Immersive Display Setup
Designing an Immersive multi-projector projection setup is a very complicated task. A dozen
- The type of
the screen(cylinder, dome, etc..)
- The radius and the height of the screen.
- The number of projectors needed to cover the screen.
- The projection resolution and aspect ratio
- The needed projector throw ratio
- Projector uniformity on the screen (how
imageis distorted on the screen)
- The projector image utilization (how much projector image falls outside of the screen)
- What will happen if you have an object between the projector and the
screen.How and where the object will drop shadow on the screen.
One of the most often mistakes that one can be made
A careful plan and design phase is needed creating a multi-projector setup on a non-planar projection surfaces. Usually, several iteration steps are needed that include the following steps: plan, design, evaluate, decide, plan, decide, evaluate, …. It is all about making rational choices and compromises based on weighted tradeoffs.
We at Fly Elise-ng offer users the program Immersive Designer PRO to design and evaluate their setups themselves. Users need to understand the basic principles of projection on irregular surfaces and have to be prepared to make compromises in their choices for screen and projectors.
One of the first decisions that one has to make is the type and
Now, the question arises: What type of projector can be used, who many projectors and where to position the projectors to the desired screen coverage and projectors overlap. Immersive Designer PRO comes with a database with more than 5000 projector models from the most of the projectors manufacturers. Choosing the projector is one of the most important choices that we need to make. Projectors are characterized by multiple factors: resolution, brightness, etc. One of the most important factors that determines the projector coverage on the screen is the projector throw ratio. This factor determines the size of the projected image based on the projector distance from the projection surface. Another factor is the projector vertical offset. This offset determines the vertical position of the projectors.
We can see that the image this projector produces on the screen is way too small to be able to cover the screen with 3 projectors. In order to be able to cover the screen vertically, this projector has to be put on a 5.7 meters distance from the screen. At this
It is clear that we will need a projector with much smaller throw ratio. Let’s select BenQ MX822ST which has a throw ratio of 0.65. We can see that this projector positioned on 2.3 meters distance of the screen will cover the screen vertically.
However, already 20% of the projected image is outside of the lower edge of the screen and the width of the projected image is not enough to cover the projection screen with 3 projectors including the overlap.
We can see that we need a projector with
Let’s now add 2 more projectors of the same type: the left and the right projector and try to position them in such a way that the projector
We can see that when we mount the 3 projectors the adjust the projectors rotations to achieve the desired overlap we are faced with 2 consequences: The combined projected image does not cover the whole height of the screen, and also that the projected image does not cover the desired screen angle of 220 deg. At this moment we will need to make a compromise and chose either a smaller screen size and angle or go for another type of projector. Selecting a smaller screen size we can end up with a screen angle of 180 deg and screen height of 1.8 meters.
When the projectors positioned to achieve the desired overlap we can see that we are approaching very closely our goal for the projection screen size. However,
When we have to position a cockpit or other objects in the projection setup between the projector and the projection screen, these objects will cast shadows from the projection light of one or more projectors on the screen.
In order to
Part of the projected image is
With Immersive Designer
After the design is finished we can build the projection setup being sure that the built setup will exactly resemble the designed setup. After
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