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Dark adaptation
| Light Glossary |
- Optical and chemical changes in the eye which, over a period of about 20 minutes, enable people to "see in the dark." it makes exposure judgments by eye doubly difficult when light levels change. tip: at such times, color perception is minimal or non-existent.
- The reflex changes which enable the eye to continue to see in dim light. for example, the pupil becomes larger and the rods in the retina become more active than the cones.
- Process by which the retina becomes adapted to a luminance less than about 0.034 cd·m–2.2,6 in dark adaptation, the pupils dilate and the two types of photoreceptors in the retina change chemical balance. after a finite amount of time, possibly 10 min, vision will change from photopic vision to mesopic or scotopic low illumination vision.4
- Process by which the eye becomes accustomed to low luminance levels. for example, an adjustment to less than approximately 0.034 cd·m–2 for scotopic vision.19 in dark adaptation, the pupils dilate and the two types of photoreceptors in the retina change chemical balance. after a finite amount of time, possibly 10 min, vision will change from photopic vision to mesopic or scotopic low illumination vision.
- Process by which the eye becomes accustomed to low luminance levels — for example, an adjustment to less than about 0.034 cd/m2 for scotopic vision (iesna 1984). in dark adaptation, the pupils dilate and the two types of photoreceptors in the retina change chemical balance. after a finite amount of time, possibly 10 min, vision will change from photopic vision to mesopic or scotopic low illumination vision.
- Time required for the pupils to dilate and for the two types of photoreceptors in the retina to change chemical balance. after a finite amount of time, an inspector will transition from photopic vision to mesopic or scotopic low illumination vision.
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Adaptatio, английский
Adaptatio [onis, f], латинский
Adaptatio, onis, f, латинский
Adaptation, английский
- Адаптация; самонастройка; самоприспосабливание
- Адаптация (приспособление организма к изменившимся условиям среды, питательным и токсичным веществам)
- 1. a change which has been or can be made to something 2. the act of changing something so that it fits a new situation 3. the process by which sensory receptors become accustomed to a sensation which is repeated add add abbr attention deficit disorder
- Адаптация
- N адаптация14 (тж. adaption, см. тж. adoption) theory
- Адаптация; приспособление
- 1) characteristics of organisms evolved as a consequence of natural selection; 2) changes in the form or behavior of an organism during life as a response to environmental stimuli; 3) changes in the excitability of a sense organ as a result of continuos stimulation.
- Stability of success in the face of a changing environment. two kinds of adaptation are distinguished. (a) darwinian adaptation after darwin who observed how organisms change their internal structure when their environment makes existing forms no longer viable. e.g., ashby`s homeostat searches for a new pattern of behavior as soon as disturbances in its surroundings drive or threaten to drive its essential variables outside specified limits. (b) singerian adaptation after singer who described how organisms, particularly man, change the nature of their environment so as to eliminate threats to or prevent the destruction of their own internal organization. e.g., agriculture, architecture and technology adapt the physical environment to human-social needs. the difference between "adaptive" and "adapting" behavior (steg) also reflects this distinction. adaptation can occur in several levels of an organiz~tional hierarchy and may even apply to itself as in "amplifying adaptation" (ashby) which is "adaptation to adapt" and has the properties of self-organization.
- Initiatives and measures to reduce the vulnerability or increase the resilience of natural and human systems to actual or expected climate change impacts. various types of adaptation exist, for example, anticipatory and reactive, private and public, and autonomous and planned. examples are raising river or coastal dikes, retreating from coastal areas subject to fl ooding from sea level rise or introducing alternative temperature-appropriate or drought-adapted crops for conventional ones.
Adaptation à la lumière, французский
Phénomène rétinien qui fait en sorte que la sensibilité des photorécepteurs (cônes et bâtonnets) change en fonction de la luminosité dans l'environnement. quand il y a beaucoup de lum
Adaptation du projet (aux conditions locales), французский
Adaptation field, английский
Поле адаптации
Adaptation level, английский
Уровень адаптации
Adaptation level;, русский
Adaptation li, английский
Changes in the eye to adapt to an unusually bright or dim light or to adapt to light after being in darkness
Adaptation of project (to local conditions), английский
Adaptation parameter, английский
Параметр настройки
Adaptation rate protocol, английский
Протокол с адаптацией скорости передачи данных
Adaptation through identification, английский
Адаптация путем идентификации
Adaptation to effect of chemicals, английский
Adaptativo(a), испанский
Dark, английский
- Shadowy, unlit, murky, gloomy, dim, dusky, shaded, sunless, black, dismal, sad
- Темное время суток
- A sound or track with weak high frequencies; opposite of bright.
Dark, английский
Dark (-) room, английский
Тёмная комната (для проявления фотоснимков) dash штрих || штриховать
Dark adapted vision, английский
- See accommodation; mesopic vision; scotopic vision.
- See mesopic vision; scotopic vision. 496 glossary d
Perception, английский
- Percepción
- An impression formed in the brain as a result of information about the outside world which is passed back by the senses
- Восприятие
- N когн. восприятие sound ~ восприятие звука speech ~ восприятие речи underlying structure of auditory-visual smth. ~ by smb. механизм восприятия чего-л. кем-л.
- Alternatively, (1) an observer`s awareness or appreciation of objects, processes or situations in his environment mediated through his sensory organs, and (2) an observer`s descriptions, hypotheses or constructs of the world of which he becomes thereby a part.
- The process of acquiring, interpreting, selecting and organizing relevant information from our senses.
Photoreceptors, английский
Special cells in the eye’s retina that are responsible for converting light into signals that are sent to the brain. photoreceptors give us our color vision and night vision. there are two types of photoreceptor cells
Illumination, английский
- Освещение; облучение (цели)
- Lighting minus craft. also, someone else`s setup.
- The amount or intensity of light striking an object.
- The luminous flux density incident on a surface, i.e., the luminous flux per unit area; usually expressed in lumens per square foot or footcandles, and lumens per square meter or lux.
- Act of illuminating or state of being illuminated. see also illuminate. compare illuminance.2,6
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Reflections, английский
Out-of-control reflections can hurt your image; controlled ones can enrich it. tips: keep the subject in full sun, the reflecting surface, such as water, in shade. reflections on water are most pronounced when the lens is at a low angle. most mirrors add a greenish cast to the image. normal mirrors add a "ghost reflection" to the main reflection; use a first surface mirror for critical images.
Dark backgrounds, английский
One way to focus attention on the subject is to use a dark background, especially with backlit and translucent subjects.
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