منابع مشابه
Chapter 10 - Color Vision and Night Vision
Day vision and night vision are two separate modes of visual perception and the visual system shifts from one mode to the other based on ambient light levels. Each mode is primarily mediated by one of two photoreceptor classes in the retina, i.e., cones and rods. In day vision, visual perception is primarily cone-mediated and perceptions are chromatic. In other words, color vision is present in...
متن کاملTrue-Color Night Vision Cameras
This paper describes True-Color Night Vision cameras that are sensitive to the visible to near-infrared (V-NIR) portion of the spectrum allowing for the “true-color” of scenes and objects to be displayed and recorded under low-light-level conditions. As compared to traditional monochrome (gray or green) night vision imagery, color imagery has increased information content and has proven to enab...
متن کاملRapid Adaptation of Night Vision
Apart from the well-known loss of color vision and of foveal acuity that characterizes human rod-mediated vision, it has also been thought that night vision is very slow (taking up to 40 min) to adapt to changes in light levels. Even cone-mediated, daylight, vision has been thought to take 2 min to recover from light adaptation. Here, we show that most, though not all adaptation is rapid, takin...
متن کاملReview of night vision technology
Night vision based on technology of image intensifier tubes is the oldest electro−optical surveillance technology. However, it receives much less attention from international scientific community than thermal imagers or visible/NIR imagers due to se− ries of reasons. This paper presents a review of a modern night vision technology and can help readers to understand sophis− ticated situation on ...
متن کاملVitamin A and Night Vision
Night-blindness was attributed to scurvy by Capt. Cook, even though it failed to clear up like other scorbutic symptoms when the patient got fresh lemons. Baraffield noted in 1814 that fresh meat and vegetables,added to the diet, improved night vision, whereas antiscorbutics did not ; yet he too regarded it as a manifestation of scurvy. The full picture of vitamin A deficiency, as it affects th...
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ژورنال
عنوان ژورنال: Nature
سال: 1957
ISSN: 0028-0836,1476-4687
DOI: 10.1038/180228a0