When it comes to the touch screen technology, most people might believe that it is something new that has emerged on the market for a few years now. However, this is far from the truth as ATMs and other gadgets have been using this technology for at least two decades. Cell phone manufacturers have started exploiting the possibilities that come with this technology and nowadays, everyone has a touch screen phone. What many might not know is the fact that optical lenses and bandpass filters are used for these phones as they have very much to do with optical rays, and their frequency. One of the most important components of such a phone is the touch screen overlay.

 

All these touch screen technologies depend on sensors, bandpass filters and even optical lenses in order to make it possible for you to use them. If you are imagining that the actual processes that happen behind the curtain of the touch screen area, then you need to understand that there is a complex connection between all sorts of lenses, sensors and different rays of light, besides the special coating of the overlay glass that makes everything possible. Whenever you use your smart phone, somehow, the fact that you touch the screen with your finger makes it possible for you to read your messages, to start a call, to end one, to play a game, to browse through the menu and even make a picture.

 

The devices that use the optical touch technology are all about infrared light, which is a part of the light spectrum, has wavelengths that are even longer than the ones of visible light and it makes hot objects visible as it is mostly radiated by them. For an optical device, there are a few things needed that have to do with  very high level of performance, with infrared light and optical lenses. One of the most important parts of the technology behind a camera sensor is a filter. We are talking about bandpass filters that are used in order to prevent visible light and make the optical object more accurate.

 

There are many reasons we have become so addicted to these smart phones and one of them is the fact that they make our lives easier and filled with the 'wow' effect. Every single time you buy a new phone that is able to perform a command the same moment you have touched the screen with your finger, you are simply amazed of the time you save and of the performances of such a gadget. There are other interesting technologies that make everything possible and the story behind them is even more complex. Just imagine the processes that happen the moment you touch the screen of your phone!

 

If you are interested in finding out what are the most important elements of an optical device, then all you need to do is to make a simple click. Here, you can find out all about optical lenses, bandpass filters and use them for your own optical assemblies!