The stars form a natural series of light sources of every intensity. With the aid of photometers, these intensities have been measured with great accuracy and graded in a scale of magnitudes. This...doi:10.1007/978-1-4612-2722-9_5Marcel Minnaert...
YW-552 Light Brightness Measurement Digital Lux Meter Specifications DESCRIPTION:YW-552 is an instrument specialized for measuring illumination and can be used in factories, lighting industry, planting, schools, offices, laboratories and street lamp construction. YW-552 is equipped wi...
The light glow that emanates from man made pollution will scatter off the atmosphere and affects the images taken by the observatory instruments. A method of estimating the night sky brightness produced by a city of known population and distance is useful in site testing of the new observatories...
《A History of Light and Colour Measurement》是2001年出版的图书，作者是Johnston, S.F.。内容简介 A work by the 2003 Paul Bunge Prize of the Hans R. Jenemann Foundation for the History of Scientific Instruments. Judging the brightness and color of light has long been contentious. Alternately ...
The aspects of color associated with hue and saturation without reference to brightness. Chromaticity (CIE) Coordinates The proportion of the standard tristimulus values used in color matching. Colors are compared by their CIE X, Y, and Z coordinates. ...
External light measurement device (11), with several brightness sensors (16, 191-193) to capture the external light, characterized in that the external light measurement device (11) has a first sensor (16) of brightness, located on a horizontally arranged surface, to determine the total overall...
Illuminometers quantify the brightness of a lit surface by measuring luminous flux per unit of area. The instrument must have the same sensitivity as the human eye for each light wavelength, and they must perform cosine correction for the angular incidence of light. (The JIS C 1609-1 standard...
6.Determination of Trace Vanadium by Catalytic Kinetic Spectrophotometry in Light Green SF-hydrogen Peroxide System亮绿SF-过氧化氢体系催化动力学光度法测定痕量钒 7.The number of photons collected by a pixel, and therefore the pixel value, is a measure of the flux, and thus of the brightness of...
The utility model relates to an operating table for testing chrominance, brightness, color temperature and contrast ratio, which comprises a machine frame. The utility model is characterized in that a guide rail placed horizontally is arranged on the machine frame; one end of the guide rail is ...