A couple of years ago the only option to present a document for the audience was the overhead projector. Today the document camera has taken its place. It has made things quite easier and convenient. It is useful for visual presentations. Document cameras are a great tool for teachers as well. An Elmo document camera is the latest addition in the world of technology that is useful for teaching in the classroom. It is handy for displaying documents and other stuff on the board of the classroom. It is an easy approach to enhance the learning of the students with the use of this document camera.
How Does a Document Camera Work
A document camera operates as an overhead projector. It brings an image on the display screen. In fact, it can display anything in a print form on the paper. A Document camera is not limited to only displaying images from the pieces of papers or books. It can be used as a webcam for capturing photos or making videos and project them on the screen during the presentations.
Let us have a look at a few of the key components of the document cameras.
Arm: This attaches the lens and the document camera’s base. A few document cameras with a movable arm make adjusting the lens possible. While others have an inflexible vertical arm, there is the need to glide the lens to change its position.
Image Sensor: An image sensor in the document camera has the best image quality. It can work with any type of digital camera. The resolution is measureable in megapixels unit; larger megapixels equal the sharper images. To display a text, the resolution of almost five megapixels would be enough. To display graphics or photos with high-resolution, there is a need for greater megapixels.
Lens: The lens of a document camera plays a pivotal part in the quality of the display. A good lens is helpful in displaying the document on the screen in a good way. The content would be readable.
Lighting: An adequate lighting is a vital part of the high-quality display. Most document cameras come with LEDs close to the lens, which light up the images on the screen.
Motherboard and Internal Components: These document cameras possess chips and motherboard. They process the signal of the image and send the signal across to the device that displays the image.
Ports: The document camera’s base has more than one port. It is useful to charge it and to attach it to the display device.
Storage: A presenter can create slides on the document camera for the presentation before time. A few document cameras have the capacity to store the images as well. They have a memory card and USB storage.
Display Options for a Document Camera
To connect a document camera with the display equipment, there is a need for a direct, wired link. It is essential to use a display equipment that has a similar port as that of the document camera. There are the following device options.
To display the imagery on the large screen or wall there is a need to attach the document camera with a projector. Many projectors make use of VGA input ports or HDMI.
A laptop or computer screen works nicely in a small room for the presentation. It is helpful to switch back and forward amid digital documents stored on the PC. For this reason, you need a USB.
In a medium size room, a TV with a big screen works better for a presentation. The presenter can connect or attach the document camera directly to the LED or TV using an HDMI input cable or USB.