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Night vision device: Difference between revisions
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==Operation== | ==Operation== | ||
Night vision can work in two very different ways, depending on the technology used. | Night vision can work in two very different ways, depending on the technology used. | ||
*Image enhancement: This works by collecting the tiny amounts of light, including the lower portion of the infra-red light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image. | *'''Image enhancement:''' This works by collecting the tiny amounts of light, including the lower portion of the infra-red light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image. | ||
*Thermal imaging: This technology operates by capturing the upper portion of the infra-red light spectrum, which is emitted as heat by objects instead of simply reflected as light. Hotter objects, such as warm bodies, emit more of this light than cooler objects like trees or buildings. | *'''Thermal imaging:''' This technology operates by capturing the upper portion of the infra-red light spectrum, which is emitted as heat by objects instead of simply reflected as light. Hotter objects, such as warm bodies, emit more of this light than cooler objects like trees or buildings. | ||
==In the Halo universe== | ==In the Halo universe== | ||