Why?
In: 1
Most remote controls work by flashing infrared LED bulbs. The bulbs flash in a sort of very fast morse code pattern, which tells an infrared light sensor on the TV what button you pressed.
Humans can’t see infrared light, but the CMOS sensors in many digital cameras can. These sensors detect the light as a purple color, because it interacts with the chemical structure of the filters and light sensors in the camera in a way that triggers both the red and blue sensors. The light is not actually red, blue, or purple, it just happens to cause the camera sensor to react in the same way it reacts to purple light.
Higher quality digital cameras have a filter to block infrared light from hitting the sensor, so the remote control trick won’t work with every camera. The filter is helpful because there is quite a bit of infrared light in sunlight, so taking pictures outdoors with a camera with no infrared filter may give the picture an unnatural purplish tint.
Why?
In: 1
Most remote controls work by flashing infrared LED bulbs. The bulbs flash in a sort of very fast morse code pattern, which tells an infrared light sensor on the TV what button you pressed.
Humans can’t see infrared light, but the CMOS sensors in many digital cameras can. These sensors detect the light as a purple color, because it interacts with the chemical structure of the filters and light sensors in the camera in a way that triggers both the red and blue sensors. The light is not actually red, blue, or purple, it just happens to cause the camera sensor to react in the same way it reacts to purple light.
Higher quality digital cameras have a filter to block infrared light from hitting the sensor, so the remote control trick won’t work with every camera. The filter is helpful because there is quite a bit of infrared light in sunlight, so taking pictures outdoors with a camera with no infrared filter may give the picture an unnatural purplish tint.
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