A simple didactic experiment has been designed and realized, in order to illustrate to undergraduate students in scientific faculties some basic concepts lying behind the fundamentals of geometrical optics. The spectral response of a human-eye-calibrated lux meter was measured using a very trivial ...
We report an AlGaAs ambient light detector with a spectral response matched to Commission Internationale de l'Eclairage (CIE) photopic luminosity function. The detector consists of an Al0.6 Ga0.4As PIN junction for main absorption, a two-step-four-section compositional grading structure centered in ...
1. It was shown with the "method of seeing-frequency" that the sensitivity of the human fovea to spectral light was enhanced during the passage of a subthreshold alternating current through the eye, if the combination of the wave-length of the test light and the frequency of the A. C. ...
and the final lens system focuses the encoded target scene onto the focal plane array (FPA) with a spectral response of r(λ)rλ : (10) I(x,y)=∫f(x,y,λ)t(x+α(λ−λ0),y)r(λ)dλ.Ix,y=∫fx,y,λtx+αλ−λ0,yrλdλ. Due to the sparse sampling process and the...
Since the spectral response of a typical thermopile pyranometer (Eppley PSP) can be considered to be essentially constant over its spectral response range (300–3000 nm). In this case, Eq. (4) reduces to the simpler expression given in Eq. (5). (5)M≈IsctE*.Eo*Iscto=f1(AMa) The sol...
These findings offer compelling evidence for the presence of dedicated, flexible, and adaptive mechanisms for neural entrainment, which may have key roles in adjusting the sensitivity and dynamic range of brain oscillators in response to environmental temporal structures....
Another example is a sensor with a spectral responsivity curve equal to the response of average human eye (photopic response). This sensor can be used for studies that require illuminance data, such as building system studies on day lighting (Hulstron [1]). Laue [23] used multichannel ...
b.A sequence or range of related qualities, ideas, activities, entities, or phenomena:the whole spectrum of 20th-century thought; the spectrum of genes involved in the immune response. Idiom: on the spectrum Having a form of autism spectrum disorder:students who are on the spectrum. ...
The spectral reflectance response of paintings S(λ) depends on the reflection response characteristics of the irradiated material and the SPD of light sources. As the carrier of colours, the types of painting pigments are rich and varied, so is the corresponding reflection spectra, which will not...
Effect of a Small Blue Adapting Field on the Spectral Sensitivity of the Red-sensitive Colour Mechanism of the Human EyeThe field spectral sensitivity of the red-sensitive colour mechanism is determined in the presence of a 1掳 blue (468 nm) auxiliary conditioning field. The effect of this ...