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why we use LED in a hidden CCD camera?
CCD = Charge Coupled Device.
In the past, cameras took still photos and videos by focusing light on film. Now, in a CCD video camera, the lens of the camera focuses light onto a small CCD sensor. CCD stands for "charge-coupled device."
CCD stands for charge-coupled device
The price of a color CCD camera can vary depending on the brand and features. Most color CCD cameras are between $200 and $1200. There are a lot of factors that go into choosing one and the CCD camera with the best features tends to be the one that is the highest price.
A CCD camera uses a special chip which detects light photons hitting an array. This data is then converted to binary which can then be interpreted by the camera into an image.
The CCD is the part of the camera that changes the light that enters the camera into a digital signal that is then saved on the memory card. You can think of it as where the film would be in a regular 35mm film camera.
One of the best types of cameras to attach to a microscope for specimen images is a CCD camera. A CCD camera is also known as a charge coupled device camera.
CCD Sensor (in a digital camera) = Retina
The night vision of domestic video cameras work by infra red. All video cameras, whether using CCD or vidicon tubes, are sensitive to the invisible spectrum of infra red. This feature is used on domestic cameras by using a high power, infra red emitting LED, on the front of the camera, to act as a floodlight. No one can see it, but the camera can. When switching it on, it also increases the sensitivity of the CCD and as a result switches to black and white mode. The infra red floodlight, lights up the subject, at close range and reflects back for the camera to see. The infra red capabilities of a digital camera can be checked yourself. Look at the front of an infra red remote control and push a button. You won't see anything. Now use your digital camera or phone camera. Point the remote control at the camera and press a button. You will now see the infra red LED on the remote flash white!
Yes
charge-coupled device