WEFOUNDVisible Light (Daw science fiction)


How does Night Vision work?
Night vision devices gather existing ambient light (starlight, moonlight or infra-red light) through the front lens. This light, which is made up of photons goes into a photocathode tube that changes the photons to electrons. The electrons are then amplified to a much greater number through an electrical and chemical process. The electrons are then hurled against a phosphorus screen that changes the amplified electrons back into visible light that you see through the eyepiece. The image will now be a clear green-hued amplified re-creation of the scene you were observing.

How a NVD can be focused?
A regular scope has an objective lens and eyepiece adjustment. First, adjust the objective lens to perfect the image. Then adjust the eyepiece to your eyesight. In binoculars or goggles each eyepiece must be adjusted separately. To do this close your left eye and adjust the right eyepiece. Then open you left eye and adjust the left eyepiece to get a full contrast image. Some night vision goggles require objective focusing first, and then adjusting the eyepieces.

Remember, that all night vision devices have a minimal focusing distance, a minimal distance at which objects can appear in full focus.

How does Night Vision work?
Night vision devices gather existing ambient light (starlight, moonlight or infra-red light) through the front lens. This light, which is made up of photons goes into a photocathode tube that changes the photons to electrons. The electrons are then amplified to a much greater number through an electrical and chemical process. The electrons are then hurled against a phosphorus screen that changes the amplified electrons back into visible light that you see through the eyepiece. The image will now be a clear green-hued amplified re-creation of the scene you were observing.

How a NVD can be focused?
A regular scope has an objective lens and eyepiece adjustment. First, adjust the objective lens to perfect the image. Then adjust the eyepiece to your eyesight. In binoculars or goggles each eyepiece must be adjusted separately. To do this close your left eye and adjust the right eyepiece. Then open you left eye and adjust the left eyepiece to get a full contrast image. Some night vision goggles require objective focusing first, and then adjusting the eyepieces.

Remember, that all night vision devices have a minimal focusing distance, a minimal distance at which objects can appear in full focus.

C. J. Cherryh planned to write since the age of ten. When she was older, she learned to use a type writer while triple-majoring in Classics, Latin and Greek. At 33, she signed over her first three books to DAW and has worked with DAW ever since. She can be found at cherryh.com.

Resident of the Pacific NW. BA in Latin in 1964, U of Okla; MA in Classics at Johns Hopkins U. in Maryland, 1965; and additional language course at OU in 1967.

Academic awards and Honors : American Classical League Scholarship 1960; Alpha Lambda Delta; Phi Beta Kappa; Woodrow Wilson Fellow 1964-5 in Classics.

Hugo Award, novel The Faded Sun: Kesrith, and short story Cassandra at Seacon, Brighton, England, 1979; Nebula Award, novel The Faded Sun: Kesrith and short story Cassandra, 1979; Hugo Award, novel Downbelow Station in 1982 at Chicago IL, Chicon; Hugo Award, Chanur's Venture, 1985, Hugo Award, novel Cuckoo's Egg, at Atlanta in 1987; nominated Hugo Award, novel Cyteen, in Boston, 1989.

How does Night Vision work?
Night vision devices gather existing ambient light (starlight, moonlight or infra-red light) through the front lens. This light, which is made up of photons goes into a photocathode tube that changes the photons to electrons. The electrons are then amplified to a much greater number through an electrical and chemical process. The electrons are then hurled against a phosphorus screen that changes the amplified electrons back into visible light that you see through the eyepiece. The image will now be a clear green-hued amplified re-creation of the scene you were observing.

How a NVD can be focused?
A regular scope has an objective lens and eyepiece adjustment. First, adjust the objective lens to perfect the image. Then adjust the eyepiece to your eyesight. In binoculars or goggles each eyepiece must be adjusted separately. To do this close your left eye and adjust the right eyepiece. Then open you left eye and adjust the left eyepiece to get a full contrast image. Some night vision goggles require objective focusing first, and then adjusting the eyepieces.

Remember, that all night vision devices have a minimal focusing distance, a minimal distance at which objects can appear in full focus.

C. J. Cherryh planned to write since the age of ten. When she was older, she learned to use a type writer while triple-majoring in Classics, Latin and Greek. At 33, she signed over her first three books to DAW and has worked with DAW ever since. She can be found at cherryh.com.


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