Abstract:
The color of a substantially spherical surface, such as that of a fruit, is measured by rotating the object about a vertical axis and projecting on the surface of the object, downwardly at 45*, an area of light that extends from the zenith to the equator of the object and is generally spherical triangular in shape, but differs from a spherical triangle in that the arc length s of the circles of latitude falling between the boundaries of the illuminated area is related as follows to the arc length s0 of the 45* circle of latitude:
Abstract translation:基本上球形表面的颜色,例如水果的颜色,是通过围绕垂直轴线旋转物体并在物体表面上向下45度向下测量从天顶延伸到 对象的赤道,并且通常为球形三角形,但与球面三角形不同,因为落在照明区域的边界之间的纬度圆的圆弧长度s与45的弧长s 0相关 纬度的DEG圈:s(x)= s0(1 + tan x)具有适当标志的X是45°角与通过照明表面穿过的圆环的中心角之间的差异。 为了测量颜色分布,使用相同的装置,但是只有一个足够小的区域被照亮以被认为是平面的,并且所选择的区域被手动地旋转到光点的下面。
Abstract:
A method and an apparatus for determining colorimetric concentrations wherein the difference between the light absorption of a medium in two or more different wave-length ranges is measured by means of an automatic wave-length switching, whereupon the concentration of the medium is calculated in dependence of said difference and the absolute absorption of the medium in one of the wave-length ranges.
Abstract:
A VISUAL COMPARISON METHOD AND APPARATUS IN WHICH AN IMAGE OF A SAMPLE IS PRESENTED IN AN IMAGE PLANE WITH A PLURALITY OF DIFFERING COLOR COMPARISON REGIONS WHOSE COLOR ATTRIBUTES, I.E. HUE, SATURATION AND DARKNESS CAN BE PROGRESSIVELY ADJUSTED SO THAT THE COLOR OF THE SAMPLE CAN BE VISUALLY COMPARED WITH THE COMPARISON REGIONS TO ESTABLISH COLOR CORRESPONDENCE WITH ONE REGION. IN ORDER TO FACILITATE SUCH MATCHING A NUMBER OF PROPOSALS ARE PROVIDED: (1) EITHER THE SAMPLE IMAGE OR THE COMPARISON REGIONS ARE TEMPORARILY ELIMINATED, (2) THE SAMPLE IMAGE AND THE CORRESPONDING COMPARISON REGION ARE REPLACED BY A DULL COLOR, (3) THE BORDERLINES BETWEEN THE SAMPLE IMAGE AND THE COMPARISON REGIONS ARE PERIODICALLY SHIFTED,
(4) A COMPLEMENTARY COLOR IS SUPERIMPOSED ON THE FIELD OF VISION TO INCREASE CONTRAST BETWEEN THE SAMPLE COLOR AND THE COMPARISON REGIONS. IN ORDER TO PERMIT DIFFERENT SAMPLE OBJECTS TO BE VIEWED UNDER DIFFERENT ILLUMINATION REQUIREMENTS, THE SAMPLE OBJECTS ARE SUPPORTED IN RESPECTIVE HOLDERS WITH CORRESPONDING OPTICAL DEVICES PROVIDING THE PARTICULAR ILLUMINATION REQUIREMENT, THE HOLDERS BEING INTERCHANGEABLE IN A HOUSING CONTAINING A VIEWER AND THE MEANS FOR PRODUCING THE COLOR COMPARISON REGIONS.
Abstract:
New and improved optical system for use in apparatus for the automatic, simultaneous multielement analysis of samples by atomic spectroscopy which include a plurality of radiation sources effective to emit radiation of different wavelengths for the irradiation of a sample burner flame are provided, and comprise radiation source optic means including a plurality of toroidal mirrors for reflecting the radiation from said plurality of radiation sources and focusing said radiation substantially at the same volume of said sample burner flame for irradiation thereof, and detector means optics, including spaced primary and secondary mirrors for observing substantially only said irradiated sample burner flame volume and focusing substantially only the radiation therefrom at the radiation detector.
Abstract:
This invention relates to a colorimeter with a light source which through a sample to be investigated illuminates a photoelectric transducer, the output of which is connected to a measuring device for measuring the intensity of the transmitted light. The light source is operated from a supply source which is effective to intermittently energize and de-energize the light source, the de-energized periods of the light source being at least as long as the energized periods.
Abstract:
Optical measuring apparatus for sampling material in which a first and a second samples of known concentration and a third sample of which concentration is unknown but in between those of the first and the second samples are intermittently introduced in this order into a flame, light beams which pass through the flame being detected by a detector which in turn produces a first, a second and a third electric signals corresponding to the concentrations of the first, second and third samples, the third electric signal being compared with the first and the second signals and thereafter introduced into an indicating means.
Abstract:
AN ANALYTICAL INSTRUMENT INCLUDING A FLAME SOURCE AND A DETECTION SYSTEM FOR THE QUALITATIVE AND QUANTITATIVE EMISSION OR ABSORPTION ANALYSIS OF A SAMPLE. THE SAMPLE IS ATOMIZED AND MIXED WITH AN APPROPRIATE FUEL GAS, AND THE MIXTURE IS LED THROUGH AN ANGULARLY DISPOSED BURNER BARREL TO A GRID FOR HOLDING THE FLAME. COMPRESSED AIR IS SUPPLIED TO THE ATOMIZER, AND A PORTION OF THE AIR IS DIRECTED TO A VENTURI NOZZLE WHICH IS CONNECTED TO A SUPPLY OF THE FUEL GAS. THE AIR IS EFFECTIVE TO DRAW THE FUEL GAS THROUGH THE VENTURI AND INTO THE ATOMIZER AT A SUBSTANTIALLY CONSTANT RATE IRRESPECTIVE OF PRESSURE FLUCTUATIONS IN A GAS SUPPLY. THE INSTRUMENT ADDITIONALLY INCLUDES A SCREEN AND BAFFLE CONSTRUCTION WITHIN THE ANGULARLY EXTENDING BARREL WHICH IS EFFECTIVE TO DIRECT LARGE DROPLETS OF SAMPLE MATERIAL AWAY FROM THE BARREL INLETS.
Abstract:
An instrument employing the principle of flame emission spectrophotometry is provided to selectively monitor the mass concentration of Fe203 aerosol in animal exposure chambers. The instrument is calibrated over the range from 0.3 to 1.6 milligrams per cubic meter, and the maximum sensitivity is found to be about 3 micrograms of Fe203 aerosol per cubic meter of air.
Abstract:
A COMBINATION TEACHING AID AND MODULAR INSTRUMENTAL ANALYSIS SYSTEM IN WHICH A PLURALITY OF MODULES ARE PROVIDED, EACH HAVING A SEPARATE FUNCTION, AND IN WHICH THE DIFFERENT MODULES ARE ADAPTED TO BE PLACE TOGETHER IN DIFFERENT COMBINATION TO PROVIDE DIFFERENT OPTICAL ANALYSIS INSTRUMENTS. THE MODULES INCLUDE A LIGHT SOURCE FOR PROVIDING LIGHT, A DETECTOR MODULE FOR RECEIVING LIGHT WHICH HAS BEEN EXPOSED TO A SAMPLE COMPARTMENT MODULE WHICH RECEIVES ONE OR MORE SAMPLES TO BE ANALYZED, AND MAY INCLUDE DISPLAY MEANS IN THE FORM OF A METER OR THE LIKE FOR READING THE OUTPUT OF THE DETECTOR MODULE. THE COMBINATION MAY ALSO INCLUDE A MONOCHROMATOR UNIT FOR PROVIDING SUBSTANTIALLY MONOCHROMATIC LIGHT, AND A FILTER MODULE WHICH IS ADAPTED TO CONTAIN ONE OR MORE FILTERS THROUGH WHICH A LIGHT BEAM MAY BE PASSED FOR OBTAINING A BEAM OF DESIRED FREQUENCY. DIFFERENT ARRANEMENTS OF THE VARIOUS MODULES WILL PRODUCE A SPECTROPHOTOMETER, A FILTER PHOTOMETER, OR A NEPHELOMETER. THE DESCRIBED MODULE UNITS ARE ARRANGED SO THAT AT LEAST SOME OF THEM MAY BE DISPOSED ON A BASE AND OPTICALLY ALIGNED BY MEANS OF COMBINATION ADJUSTING AND CLAMPING MEANS, SO THAT THE UNITS MAY BE THERE AFTER MOVED, OR REPLACED AS DESIRED WITHOUT AFFECTING THE ALINGMENT THEREOF. THE DESCRIBED UNITS ARE CONSTRUCTED AND ARRANGED SO THAT ALL THE SIGNIFICANT OPERATIONAL AND FUNCTIONAL PROPERTIES OF EACH MODULE MAY BE DIRECTLY OBSERVED BY THE STUDENT. THEREFORE, EACH MODULE IS ADAPTED TO PERFORM A MINIMUM NUMBER OF FUNCTIONS, AND THE MODULAR CONCEPT AND THE CONSTRUCTION FEATURES ARE USED AS A TEACHING AID USED TO EMPHASIZE THE RELATION BETWEEN VARIOUS SYSTEMS OF OPTICAL INSTRUMENTAL ANAYLSIS. THE FILTER COMPARTMENT MODULE AND THE SAMPLE COMPARTMENT MODULE INCLUDE HOLDER MEANS FOR HOLDING LIGHT FILTERS OR SAMPLE UNITS, AND THE HOLDER UNIT IS CONSTRUCTED SO AS TO FACILITATE INTERCHANGE OF SAMPLE HOLDERS AND FILTER UNITS, AND TO BE ADAPTED FOR USE WITHOUT CHANGE TO PERFORM DIFFERENT FUNCTIONS IN DIFFERENT INSTRUMENATAL COMBINATIONS.