Search results
Results From The WOW.Com Content Network
Contrast is the difference in luminance or color that makes an object ... In light of the multitude of etiologies leading to decreased contrast sensitivity, contrast ...
Contrast Contrast is the difference from exposed portion to unexposed portion. The higher the contrast is, the more obvious the difference between exposed and unexposed portions would be. Sensitivity Sensitivity is the minimum energy that is required to generate a well-defined feature in the photoresist on the substrate, measured in mJ/cm 2 ...
Jablonski diagram of an energy scheme used to explain the difference between fluorescence and phosphorescence. The excitation of molecule A to its singlet excited state ( 1 A*) may, after a short time between absorption and emission (fluorescence lifetime), return immediately to ground state , giving off a photon via fluorescence (decay time).
[1] A luminescent object emits cold light in contrast to incandescence, where an object only emits light after heating. [2] Generally, the emission of light is due to the movement of electrons between different energy levels within an atom after excitation by external factors.
The "luminance contrast" is the ratio between the higher luminance, L H, and the lower luminance, L L, that define the feature to be detected.This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices.
The ability of a lens to resolve detail is usually determined by the quality of the lens, but is ultimately limited by diffraction.Light coming from a point source in the object diffracts through the lens aperture such that it forms a diffraction pattern in the image, which has a central spot and surrounding bright rings, separated by dark nulls; this pattern is known as an Airy pattern, and ...
Reduction in contrast between print and paper by reflection of the light source in the printed matter (veiling glare). Reduction in contrast by reflection of bright areas on the surface of a transparent medium as glass, plastic or water; for example when the sky is reflected in a lake, so that the bottom below or objects in the water cannot be ...
Does not normally occur at 100% brightness level. At levels below 100% flicker often occurs with frequencies between 60 and 255 Hz, since often pulse-width modulation is used to dim OLED screens. [26] [27] Risk of image persistence or burn-in: High [28] Low [28] High [28] High [29] Energy consumption and heat generation High [30] Low [30]