Abstract:
A beam detector including a light source, a receiver, and a target, acting in cooperation to detect particles in a monitored area. The target reflects incident light, resulting in reflected light being returned to receiver. The receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector emits a first light beam in a first wavelength band; a second light beam in a second wavelength band; and a third light beam in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.
Abstract:
A gas detector including a planar mirror; a concave spherical mirror facing the planar mirror, having an optical axis orthogonal to the planar mirror, the distance between the planar and spherical being equal to 0.75 times the radius of curvature of the spherical mirror, to within 10%; a radiation emitter/receiver arranged at the point of intersection of the spherical mirror and of the optical axis; and a radiation receiver/emitter arranged at the point of intersection of the planar mirror and of the optical axis.
Abstract:
A device for detecting a substance includes a light source arranged to emit a light signal through a sample cell, wherein the sample cell is arranged to temporally house a sample compound having a portion of the substance, and an optical processing module arranged to detect the light signal emitted through the sample cell to identify physical attributes of the light signal altered by the sample compound, wherein the physical attributes of the light signal altered by the sample compound is processed so as to detect the substance within the sample compound.
Abstract:
Described herein is a method for automatically inspecting contact lenses having printed markings thereon for cosmetic defects. The method involves use of a colored optical filter to effectively eliminate the printed markings from the image being presented to the automated inspection system, thus preventing false rejects, while at the same time preventing the masking of actual defects.
Abstract:
A method of detecting particles in an air flow is described. The method includes receiving a signal indicative of light intensity scattered from the air flow at a plurality of wavelengths and processing the signal indicative of the intensity of received light at each of the wavelengths and a corresponding wavelength dependent parameter to generate an output signal indicative of at least one characteristic of particles in the air flow. A particle detection system is also described.
Abstract:
A measuring apparatus (200) is provided for inspecting a seal (50) of an item (20). The measuring apparatus (200) includes a radiation source (510, 520) for providing radiation for illuminating the seal (50) of the item (20), a detector (530, 540) for receiving radiation from the item (20) for generating a corresponding detected signal, and a processing arrangement (160) for processing the detected signal to generate an output signal indicative of a state of the seal (50). The radiation source (510, 520) is arranged to focus the radiation into a plurality of focal points at the seal (50) of the item (20), wherein the focal points are mutually spatially spaced apart. Moreover, the detector (530, 540) is arranged to image one or more of the focal points and to be selectively sensitive to an intensity of radiation received from the one or more focal points to generate a detected signal. Furthermore, the measuring apparatus (200) includes a processing arrangement (160) for receiving the detected signal and for processing the detected signal to generate the output signal indicative of the state of the seal (50).
Abstract:
Methods for non-destructive testing of synthetic ropes is described, where the rope in use is subjected to X-ray, terahertz, permanent magnetic field or electromagnetic analysis to determine a pattern, the results of the analysis are compared with a standard pattern determined by the analysis, and the results of the comparison are used in determining whether the rope is fit for use; where the rope comprises at least two types of fibers, the first fiber type has a density which differs from the density of the second fiber type and the second fiber type is of the same polymer material as the first fiber type, but provided with a high-density or low-density material. Ropes suitable for use in this method are also described.
Abstract:
A device for testing an application state of a plurality of strips of fiber reinforced plastic tape affixed in rows on a surface of a structure, the device includes an illumination component emits observation-use illuminating light beams toward a test region of the fiber reinforced plastic tape, an observation component observes reflected light from the test region, and a testing component tests the application state of the fiber reinforced plastic tape based on an image observed by the observation component. The illumination component includes a plurality of irradiation units that light simultaneously and are disposed such that a pair of the observation-use illuminating light beams are emitted from directions that are mutually symmetrical with respect to a normal line of the test region, and an illumination direction change component that changes the directions of the pair of observation-use illuminating light beams emitted from the illumination component about the normal line.
Abstract:
Disclosed is a method of monitoring and optimizing the concentration of an additive composition in a fuel ethanol. The method includes adding a known amount of the additive composition to the fuel ethanol to create a treated fuel ethanol. A measured fluorescent signal provides information for determining the concentration of the additive composition in the fuel ethanol. A component in the additive composition is capable of providing the fluorescent signal or capable of being chemically derivatized to provide a fluorescent signal or a colorimetric signal. Based upon the measured fluorescent signal or colorimetric signal, the concentration of the additive composition in the fuel ethanol may be adjusted.
Abstract:
A method and apparatus for field spectroscopic characterization of seafood is disclosed. A portable NIR spectrometer is connected to an analyzer configured for performing a multivariate analysis of reflection spectra to determine qualitatively the true identities or quantitatively the freshness of seafood samples.