We are all familiar with the everyday video camera and likely have some pictures or videos on our computers of ourselves using one. It's really simple to use these everyday electronic gadgets, as they just use light from an LED diode to make a small video image. However, how does a video camera work? How do you record a video and make it look so good? Here's a little background information on how these gadgets work.
The basic technology that makes up video cameras is based on an LED diode. When a bright light strikes the diode, electrons jump from the diode onto the film surface. In the previous technology, this light was captured by a tiny sensor that was mounted inside the camera body itself. Today, most cameras use an array of LEDs that are mounted inside tiny cameras that can be remotely controlled.
There are two types of LEDs that are used in these tiny cameras. One type of LED produces red light, while the other produces green light. By using a series of red and green LEDs, the camera can capture and automatically process the light that hits it. This is done by the camera's operating system, which is similar to computer hardware. The difference is that instead of reading the light directly, the operating system processes the light that hits the sensor.
So, how does this all work? Well, when a bright light hits the diode, the electrons jump from the diode onto the sensor. The light sensors then read the data and upload it to a computer. The computer stores the images until you need them. If you are wondering how all this works, remember that light only hits a diode when electrons are charging to either of its two states, or when it becomes a full state.
The photoresistor that was used to capture the photos on the screen then decodes the light that hits it into electrical pulses. It does this through a series of mathematical equations, which are then translated into a digital format. The converted digital images are then stored in your computer's hard drive for you to view later. Now that we know how the process works, we can see how a digital camera actually works.
To take a photo, the shutter button on the camera is pressed and the camera's microprocessor recognizes a simple pattern of light, such as the light that is present when a sun rises. From this, the computer can determine which photo is the most likely to be a successful one. Once the photo has been taken, the computer sends it off to be processed. In order for the photo to be made into a digital photo, a pixel is lit up and its color determined. The photo sensor then determines which color is the one most appropriate for it to be used as a part of the digital photo.
Digital cameras differ from camcorders in that they use a different type of recording medium. For example, digital stills are much different from DVD video. A camcorder will usually record onto a DVD disc, but a digital video camera will use an SD card for storage. Because there are no wires involved, there is another advantage to using a digital video camera over a camcorder.
For individuals that are interested in the science behind how does a video camera work, a short online course can help. In a short overview of how a digital video camera works, it is important to note that the device uses an electron beam in order to convert the light that hits it into an electrical signal. This process is also used to create digital photos. When looking at how the process works, it is also important to remember that the current that runs through the camera's lens is different from the light that strikes it. By using a separate connection, it is possible to adjust the incoming light and ensure that the picture is captured with the appropriate contrast and color.
