what is night vision technology? what are its types and further developments?
337827
Night Vision is the ability to see, whether through biological or technological means, in a dark environment.\n\nCommon Methods:\n==============\n\n1. It is possible to construct an imaging device with microwave energy, sound, or infrared that is reflected or radiated by objects and can be focused and sensed.\n\n2. Image intensification by using a vacuum-tube based device that amplifies visible light from an image so that a dimly lit scene can be viewed by a camera or by eye.\n\n3. Biological night vision, where molecules of rhodopsin in the rods of the eye undergo a change in shape as light is absorbed by them.\n\nThese are used in disaster recovery, watching & protecting animals, warfare, and many more.
99063
What you see outside at night is a mixture of these:\nStars (like the sun)\nPlanets\nSattelites\nGalaxies
557137
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.
464939
Bluetooth technology\nDigital camera improvements like the mega pixel\nThat laptop tablet where you can rotate the monitor and close it to become a tablet - has a pen too\nprogramming your TV (VCR is ancient)to record using your cell phone\nTracking devices used in cars\nIpods...smaller and smaller\nComputer speeds have jumped through the roof!\nPlasma, LCD TVs  Flat screen TVs\ncordless...anything
922231
There is a herb called Bilberry that can cure you of night blindness. (Like the glare from head lights from on comming traffic.) It was used by the Brittish Air Force pilots durring WW1. They said it gave them better night vision. I tried it myself. It works.\nBilberry is inexpensive and can be found at any store that sells vitamins and herbs. (Walgreens, K-mart ect.)\nSEE YA.
877680
TFT LCDs is a variant of Liquid Crystal Display (LCD) which use Thin-Film Transistor (TFT) technology to improve their image quality. TFT LCDs are one type of active matrix LCD, though this is usually synonymous with them. They are used in both flat panel displays and projectors. In computing, TFT monitors are rapidly displacing competing CRT technology, and are commonly available in sizes from 30 to 77 cm (~12 to 30 inches). As of 2006, they have also made inroads on the television market.
1090085
the most up to date tecnology that i have seen is most modern electronics in equipment laser guided planters gps is huge in the agriculture industry a gps unit can along with sensors tell you what parts need certain types of fertilizer monitors can tell you what your yeild or moisture is it can also tell you where you have sprayed and keeps you from over spraying also equipment sensors tell you when there are problems with the engine or other things the best way to keep up to date with the latest in farming tecnology check out you local ag equipment dealer or cooperative also tecnology is inpacting grain and livestock with bioengineered crops
254375
Great question!\n\nThe human eye and the real world have a range of light and dark values from 100,000 to 1.\n\nMedia like film and digital cameras have traditionally only been able to capture or show about 500 to 1 in ranges.\n\nThe next generation of digital cameras will compete on pixel quality and range sensitivity, not just megapixels.\n\nSee the cool links below:
1187473
BLUE-RAY  The new technology
832832
Techno Alan is wrong. The glass does absolutely nothing to shift the infrared to the visible spectrum.  What is does is absorb some of the visible light while allowing the near infrared to pass through.  Photographic film can be made to respond to the near infrared, meaning that just as some of the layers in the film get exposed by the red , green or blue, an IR film has a layer that is also sensitive to the near IR.  So all that the filter does is to supress the visible part of the scene relative to the near IR.\n\nMost digital cameras include a infrared and UV filter over the sensor.  The filter prevents near infared light from adding noise to the red pixels in the camera array, and at the same time prevents you from taking the IR picture.  The UV filtering prevents the "fogging" that can occur on bright days from UV background. It eliminates the need for the "skylight filter" that is frequently used in film photography to enhance contrast.\n\nNow to the original question - to see in the infrared you need to use a sensor that can detect infared light and then convert it to a visual image.  Night vision goggles use a layer of material that emits an electron when it absorbs a near infrared photon.  The eletrons are "multiplied" uisng a "microchannel plate".  The stream of electrons then strikes a phosphor screen, making a visible image.  \n\nAt longer infared wavelengths different detector materials are used.  The materials can be either photoconductive (absorbed light changes the conductivity of the material which can be electrically read out) of photovoltaic (absorbed light generates electric charges - electrons and hoels-  within the semiconductor marterial that are collected and read out).  (CCDs or CMOS sensors in digital cameras are photovoltaic imaging devices that are sensitive to visible light).  There are also "bolometer" thermal sensors that absorb infared light, generatyinga  small change temperature can be read out to form an image.
71963
Almost all real-time sattilites are owned by the Military.  They don't want to share their technology with the general public.  They have a vested interest to protect their capibilities.  There hasn't been enough commercial demand for real time photos.  Plus, realtime only works when the sattelite is directly overhead.  Consumer users would have no control over what they see, or how far they zoom in, ect.
824029
Alien light disrupting devices. The aliens realize that tiny intellects like ours can not handle interstellar knowledge. Since cameras are in essence, a photon(light)sensitive piece of film or plate that converts the light to digital information, aliens disrupt the photons around their space craft.
183860
The Predator had night vision and I think the Creature from the Black Lagoon had it too. Do they count?
632145
Agriculture and related technologies
990630
Maybe a geosynchronously orbiting satellite. Those are satellites that rotate with the Earth so it appears that they don't move from our perspective.\n\nObviously, anything else (including stars) would move as the night progressed.\n\nHope that helps.
482742
Micro electronics that you could see through. Nanobot technology. Using the contact lens as a focus lens. Tapping into the human body's natural electricity as a power source. Possible in a few years. \n\nIf the contact was a colored contact you couldn't see through, highly possible now.
208385
There is significant research being done in imaging through objects like bricks, etc. However, much more research needs to be done. And the technology is still very far away to image such tings from space. \nSo NO.\n\nHopefully the technology would be used to image into the ground and used for mine detection in many parts of the world.