How Does 3D Movies or Cinema work? The Basics

3D stands for 3 Dimension ie Height, Width & Depth (distance).
A typically shot movie scene is in 2D that’s height and width. You always wondered about the 3D movies. How the scene comes alive?? How do you feel yourself right in the action of the movie??

Well for understanding it you first need to know little basics about working mechanism of our eyes.

How exactly an Image is created in our brain?
As you can see a normal human being is equipped with two eyes and after reading the following, you’ll also find the reason to have two eyes. Thedistance between our two eyes is very important which is appx 2 inches. When we see something, our each eye captures a little different picture in respect to angle anddistance . Our brain after analyzing both pictures simultaneously, creates a single combined image which we actually SEE creating a sense ofdistance, height & width i.e. 3 Dimensions. When you see a landscape, you can identify which tree is closer and appx distance.

If you close one eye and see the landscape, your judgment about distance would not be that good.

So what is to be done to create 3D effect in movies?
Simple, manage or workout something in such a way that Viewer sees different pictures in both the eyes. But how that’s possible??

How does 3D Glass work ?
Well, here comes the ROLE of that 3D Glass (Spectacle). The 3D Glass actually has different coloured glasses in both eyes either Red/Green or Red/Blue or uses Polarisation to allow separate images to enter each eye.

Red/Green or Red/Blue
The Cinema is projected by two projectors simultaneously, the same scene in two different colours. The filters (coloured glass) on the glasses allow only one image to enter each eye, and your brain does the rest. Following image explains you this.


Polarisation
Two projectors project a same image but from different angles on screen. The polarized glasses allow only one of these images to enter in an eye. The rest is done by your brain.