INFORMATIVE SPEECH: HOW 3D GLASSES WORK – Flashcards

September 27th, 1922, that was the day a new type of experience joined our society. That was the day the first 3D movie was ever created. Movies also known as films, have been a part of our world since the 1890's, when the film industry was created with basic motion pictures. Movies have since expanded from silent movies to slapstick gags and now to hyper realistic and complicated plot twists.

Now all of them come with extra special effects, such as, what we're going to talk about today, 3D glasses. In the past few decades 3D movies have risen greatly in popularity, and now we can even watch 3D visuals come to our own televisions. I'm sure many of you have had the time of watching a 3D movie or maybe multiple 3D movies. Over the past few weeks I have studied the way 3D glasses work and how they're able to be used. Now, today I want to talk with you all about, a general background on 3D glasses, how 3D glasses work, and how they trick our mind, for us to be able to see the images displayed in front of our eyes.

So, 3D glasses create images we can almost reach out and touch, it all had to have started somewhere and it started and was also created by a man named Charles Wheatstone. In 1838, Charles applied principles of stereopsis, which is the ability to see create depth, to create a 3D device. The device later on became streamlined and adjusted by other inventors After it all, those 3D glasses popularity began to rise and around 1922 it skyrocketed, due to the first movie ever being made with 3D glasses. And the rest is history, as we know today, 3D glasses are used in many movies and are more real than ever when looking through them. Now let's talks about how 3D glasses actually work.

In order to see 3D, we need to be able to have something that would integrate that 3D aspect for us, and that would be 3D glasses/lens. Stated by Marshall Brian, the founder of HowStuffWorks, states in his 2003 article, "How 3D Glasses Work", that the lenses of the 3D glasses are carefully aligned to project the left and right eye images onto the screen with a slight offset, similar to the distance between your eyes get projected through polarizing filters positioned in front of each lens.

Just like your sunglasses those polarizers straighten out the rays of light so they travel in straight lines. Also Andrew Koltonow, a writer for Mental Floss, in his 2012 article, "3D Works", states without 3D glasses on both of our eyes see both sets of projected images and now all you really are seeing are blurry images in front of you on the screen. But with the 3D glasses on everything is seen super clear, because the lenses in the glasses are aligned to the polarized light in the projector lenses. The glasses guide both the left and the right eye images into your eyes and your brain does the rest. This transitions to my last part, how these glasses trick our minds for us to be able to see the images displayed.

A general overview, the reasons why we need to wear 3D glasses, like I've stated before, is to feed different images into our eyes. The movie screen or TV screen, wherever you're watching a 3D program, that screen displays separate images that need to be sent to each eye. Brain Chen, a writer for Wired, a online news article, created in his 2009 article,

So today we've talked about a general background on 3D glasses, how 3D glasses work, and how 3D glasses trick can our mind. Since September 27th, 1922 films of all sorts of add on features have changed the way we perceive things, many different ways of movie making have been integrated to create new illusions while watching movies, and it continues now, not only at movie theaters, but now, even in our own homes. And this new type of 3D ability we have discussed today will continue to build on the upcoming improvements it will create for itself and on, for generations to come.