Important Aspects of IMAX 3D

You may have seen an IMAX movie before or heard others share the wonderful experience it brings and are still wondering how did they do that? Well if you are, you should know that there are a number of equipments that come together to create this effect. These include an extremely large film, a very sophisticated projector and an extremely large screen.

The Film: The movies that are shown in the traditional theatres are all filmed on a 35mm film. However, when it comes to an IMAX film, you are looking at a 70mm film with a surface area that is ten times as large as the traditional films. As a result, IMAX films are able to capture ten times the information. This causes the images to be projected with extremely high quality. When this is coupled with your peripheral vision, and an extremely clear sound system, it plunges you into an illusion that makes it seem as if you are actually in the picture when all you are doing is watching it.

The Projector: IMAX 3D movies use projectors that are extremely powerful, advanced and précised. They work with the films mentioned above which are 70mm long and 15 perforations wide. Using the IMAX projectors, films are made to travel at 24 frames each second as in the case of a convectional projector. However, with an IMAX projector, the films are moving at 334ft per minute, instead of 90ft per minute as in the case with convectional projectors.

The Sound System: To ensure that every member of the audience receives a clear and excellent sound quality IMAX theatres are equipped with extremely large sound systems. They are organized to have 4 large cluster speakers behind the screen and 2 in the back with one to the left and the other to the right. To enhance the sound, a large bass speaker is also placed behind the screen. The soundtracks for movies are not loaded on the film itself to save on picture space. Hence, to get the sound, a DVD disk is used to load the digital sound track unto a computer, which then works to have the projector and sound moving in harmony with each other.

The Camera: IMAX cameras are specially designed with large canisters to hold the films. However, because the films are so large the cameras are only able to house film capable of lasting three minutes. As a result of this, after shooting a scene for three minutes the cameras must be reloaded, and this can take as much as 30 minutes. In order to film 3D, these cameras are equipped with two lenses and two films which are being used simultaneously. Both lenses are separated by a distance which is equivalent to the distance between our eyes. Hence, one film or lens is for capturing images for the right eye while the other is capturing for the left at the same time.

How it All Comes Together

To create the 3D picture, the two pictures captured by the films are both projected using a polarized glass. However, each is polarized in a different way to prevent the right eye from seeing the left eye's image and vice versa. The polarized glasses then help you to see both images clearly while keeping them separate. Once the images are communicated to your brain, they are converge into one complete picture which seemingly projects out of the screen.

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