Abstract:
A flat spectrum illumination source for use in optical metrology systems includes a first light source generating a visible light beam and a second light source generating an ultraviolet light beam. The illumination source also includes an auxiliary light source generating a light beam at wavelengths between the visible light beam and the ultraviolet light beam. The three light beams are combined to provide a broadband probe beam that has substantially even illumination levels across a broad range of wavelengths. Alternately, the illumination source may be fabricated as an array of light emitting diodes selected to cover a range of separate wavelengths. The outputs of the LED array are combined to produce the broadband probe beam.
Abstract:
A compact handy type inspection instrument is provided for conducting readily nondestructive inspection of an inspection object in any working site. The inspection instrument comprises a spectroscope assembly containing an optical fiber-arranging member for arranging and holding a light-outputting end of an optical fiber bundle to be flat in a uniform layer thickness, a packaged compact spectroscope which is enclosed in a package having a slit-shaped light inlet window on a side confronting the rectilinear light-outputting end of the optical fiber-arranging member and is constituted of linear type continuous variable interference filter, a microlens array, and a linear type silicon array sensor assembled in the named order from the side of the light inlet window toward the opposite side, and a positioning device for positioning the rectilinear light-outputting end of the optical fiber bundle to fit to the light input window; and a detection head; incorporated together into a main body casing.
Abstract:
A fibre optic coupling plate (24) has a sample viewing face for receiving light from a sample (12), an output window (18) for conveying sample originating (emitted) light to an imaging detector and an additional window through which excitation radiation can be projected. A primary light is provided through the plate made up of optical fibres which will convey light entering the viewing face, directly and with minimal loss, to the output window, and a secondary light path separate from the primary light path, by which excitation radiation entering the additional window is conveyed to the viewing face for irradiating the sample.
Abstract:
A line illuminating apparatus comprises a pair of irradiating units 12a, 12b of the same structure. The irradiating unit 12a. The light irradiating unit 12a includes a light source 14a, a first light guide 16a consisting of a large number of optical fibers, a light connector 18a, and three second light guides 20 (20a to 20c). The first light guide 16a permits the light emitted from the light source 14a to be incident as a slender rectangular light ray on the light connector 18a. The light emitted from the light connector 18a is divided by the three second light guides 20. Each light guide 20 is in the form of a thin plate, and the light emitting surfaces of the light guides 20a to 20f are arranged to define a imaginary semicylindrical plane surrounding the irradiating line L of work 28. The particular construction is effective for suppressing the loss of energy required for illumination. Also, the inspection is not adversely affected by the presence of, for example, an irregularity on the surface of the work.
Abstract:
A hand-held, battery operated, single photon sensitivity phytoluminometer is claimed for rapid, simple nondestructive, noninvasive evaluation of photosynthetic topography in green leaves. All the steps for generating phytoluminescence are performed within a single, light tight enclosure. The sensitivity of the instrument is such that stress induced changes in photosynthesis can be detected seconds after occurrence. Thus phytoluminography is made an easily applied technique for practical use by all those concerned with plant life.
Abstract:
A hand-held, battery operated, single photon sensitivity phytoluminometer is claimed for rapid, simple nondestructive, noninvasive evaluation of photosynthetic topography in green leaves. All the steps for generating phytoluminescence are performed within a single, light tight enclosure. The sensitivity of the instrument is such that stress induced changes in photosynthesis can be detected seconds after occurrence. Thus phytoluminography is made an easily applied technique for practical use by all those concerned with plant life.
Abstract:
The invention is an automated solder joint inspection system for determining the quality of a specular soldered joint through examination of the shape of the joint surface using a series of point light sources and the associated highlight reflections from the joint surface. The light from point light sources, which is directed toward the solder joint, is reflected in a pattern from the solder joint to an array of light responsive transducers from at least one location. Utilizing the intensity values from the light responsive transducer array, the surface orientation of the solder joint at a number of points is determined. The solder joint is evaluated in one of two ways. In one way, using known surface features of solder joints along with curve fitting techniques, a series of grid maps is mathematically interpreted to reconstruct the solder joint surface. A rule-based system, through comparison with acceptable solder joint surface features, evaluates and classifies the joint for an acceptability determination. In another way the surface orientation is used to generate an Extended Gaussian Image of the joint and the features of this are analyzed.
Abstract:
A photoelectric measuring apparatus for use in an automatic chemical analyzer in which a plurality of test items are analyzed by using light beams having different wavelengths, including a white light source for emitting a polychromatic light beam, a grating for diffracting the polychromatic light beam into a plurality of light beams having predetermined different wavelengths, a plurality of light guides for guiding the light beams emanating from the grating to a plurality of cuvettes containing test liquids to be analyzed, a plurality of light receiving elements for receiving light beams transmitted through the cuvettes, an additional light guide for guiding a polychromatic light beam emanating from the grating as the zero order light beam to a cuvette via an optical filter having a desired transmission wavelength, and an additional light receiving element for receiving a light beam transmitted through the cuvette.
Abstract:
An apparatus and method continuously samples and measures the changing concentration and/or density of suspended solids in a liquid medium without electrical connections at the submerged points in the liquid. A submersible sensing head is connected by an elongate probe to an non-submersible enclosure which contains at least one light source and one light detector. The sensing head has an apertured sample chamber allowing liquid to flow freely therethrough when submerged and contains at least one light emitting lens and at least one light receiving lens aligned in the flow path. The light emitting lens is connected to the light source and the light receiving lens is connected to the light detector with fiber optic bundles extending the probe. An elongate shaft extends through the probe and into the sensing head sample chamber and has a lens wiper at its lower end. The shaft is reciprocated by a timed motor in the enclosure to move the lens wiper between the lenses to wipe them clean of debris at selective continuous or intermittent cycles. When the sensing head is submerged light is transmitted from the light source to the emitting lens through the liquid between the lenses to the receiving lens and to the light detector for determining the concentration and/or density of suspended solids in the sample liquid with no submerged electrical connections.
Abstract:
This invention relates to an apparatus, method and system for directly obtaining the optical density of a dynamic biological system over the wide operating range and a wide range of organism mass, compensating for the primary interference factor, agitation and gas bubble formation, and thereby obtaining a on-line real time monitoring of cell density to follow the product concentration and progress of the biological reaction system.