Abstract:
A method of and apparatus for obtaining radiation interaction data related to an image of an object. The method involves using a detector system for detecting and collecting spectroscopically resolvable information about incident radiation, and collecting one or more datasets of information at the detector after interaction with an object. Each dataset is resolved across at least three frequency bands within the spectrum of the source. The ratio between measured intensities is evaluated for at least two pairs of such frequency bands in a given intensity dataset to obtain a numerical indicator in functional relationship with a material property. The numerical indicator is then compared with a library of data characteristics of target materials. An apparatus is also disclosed for inspection of materials
Abstract:
A method of and apparatus for obtaining radiation transmission data from a liquid in such manner that allows some data about relative proportions of constituent ingredients to be derived is described. A radiation source and a radiation detector system able to resolve transmitted intensity across a plurality of frequencies within the spectrum of the source are used to produce transmitted intensity data for each such frequency. Measured data is compared numerically to a mass attenuation data library storing mass attenuation data, individually or collectively, for a small number of expected constituent ingredients of the liquid to fit each intensity data item to the relationship given by the exponential attenuation law: I/IO=exp [−(μ/ρ) ρt] in respect of the constituent ingredients and derive therefrom an indication of relative proportions of each constituent ingredient.
Abstract:
A method of and apparatus for obtaining radiation interaction data related to an image of an object. The method involves using a detector system for detecting and collecting spectroscopically resolvable information about incident radiation, and collecting one or more datasets of information at the detector after interaction with an object. Each dataset is resolved across at least three frequency bands within the spectrum of the source. The ratio between measured intensities is evaluated for at least two pairs of such frequency bands in a given intensity dataset to obtain a numerical indicator in functional relationship with a material property. The numerical indicator is then compared with a library of data characteristics of target materials. An apparatus is also disclosed for inspection of materials.
Abstract:
A method and apparatus for the identification and detection of composition of a liquid are disclosed. The invention involves detecting and collecting spectroscopically resolvable information about incident radiation, and collecting one or more datasets of intensity information at the detector system. Each dataset is resolved across at least three frequency bands within the spectrum of the source to produce an intensity data item for each band. A numerical relationship is evaluated for at least two pairs of frequency bands in a given intensity dataset to obtain a numerical indicator functionally related to a characteristic physical material property such as a material coefficient that varies functionally with radiation energy. The numerical indicator is compared with a library of data for a range of potential component liquids in order to obtain an indication of the likely composition of the liquid sample. An apparatus for use in identifying and detecting a liquid is also disclosed.
Abstract:
A method of and apparatus for obtaining radiation transmission data from a liquid in such manner that allows some data about relative proportions of constituent ingredients to be derived is described. A radiation source and a radiation detector system able to resolve transmitted intensity across a plurality of frequencies within the spectrum of the source are used to produce transmitted intensity data for each such frequency. Measured data is compared numerically to a mass attenuation data library storing mass attenuation data, individually or collectively, for a small number of expected constituent ingredients of the liquid to fit each intensity data item to the relationship given by the exponential attenuation law: I/IO=exp [−(μ/ρ) ρt] in respect of the constituent ingredients and derive therefrom an indication of relative proportions of each constituent ingredient.
Abstract:
An apparatus and method are described for obtaining radiation interaction data from an object to enable better determination of the composition of the object. A radiation source and a radiation detector system are used to collect both transmitted and scattered radiation, preferably including radiation from at least one forward scatter mode. The detector system is capable of detecting and collecting spectroscopically resolvable information about incident radiation. Each intensity dataset is resolved across at least three of energy bands within the spectrum of the source, and this data may then be processed numerically to enable better determination of the composition of the object.
Abstract:
The present invention relates to an apparatus for vapour phase crystal growth to produce multiple single crystals in one growth cycle comprising one central source chamber, a plurality of growth chambers, a plurality of passage means adapted for transport of vapour from the source chamber to the growth chambers, wherein the source chamber is thermally decoupled from the growth chambers.
Abstract:
A stereo-camera head is provided, particularly for robotic applications, in which the parameters of focus, zoom and camera convergence are adjusted by remotely controlled motor drives. Camera separation distance and iris function can be similarly controlled. Twin cameras can be mounted on a common base by means of camera cradles pivotally mounted on the base or by means of rotary carriers that are mounted to traverse along respective lead screws driven by respective stepper motors. Alternatively, there may be a single camera lens system transmitting both left and right images received from left and right movable optical elements via a beam splitter/combiner. Two CCD imaging chips can receive the left and right images from the single lens system via a second beam splitter/combiner. A controlling micro-computer can be employed to keep the stereo images within human tolerance of fusion limits.
Abstract:
A structure including a substrate, an intermediate layer provided and formed directly onto the substrate, a transition region, and a group II-VI bulk crystal material provided and formed as an extension of the transition region. The transition region acts to change the structure from the underlying substrate to that of the bulk crystal. In a method of manufacture, a similar technique can be used for growing the transition region and the bulk crystal layer.
Abstract:
Apparatus for vapor phase growing of crystals having a single multi-zone heater arranged to heat a heated zone to give a predetermined temperature profile along the length of the heated zone. A generally U-shaped tube having a first limb, a second limb, and a linkage connecting the first and second limbs is located on the heated zone. The first limb contains a source material. The second limb supports a seed such that the source material and seed are spaced longitudinally within the heated zone to provide a predetermined temperature differential between the source and seed. The crystal is grown on the seed.