Light barrier
Encyclopedia
The term light barrier to several different concepts:
- The theoretical maximum speed that any physical object or information can travel at is the Speed of lightSpeed of lightThe speed of light in vacuum, usually denoted by c, is a physical constant important in many areas of physics. Its value is 299,792,458 metres per second, a figure that is exact since the length of the metre is defined from this constant and the international standard for time...
. - An opto-electronic device used in security applications, also known as a light curtainLight curtainLight curtains are opto-electronic devices that are used to safeguard personnel in the vicinity of moving machinery with the potential to cause harm such as presses, winders and palletisers. Light curtains can be used as an alternative to mechanical barriers and other forms of traditional machine...
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