Abstract:
The invention relates to a measuring array having an optical device into which a radiation beam (10) departing and diverging from a sample is injected for measurement and a detector (13) arranged downstream of said optical device, said detector having a plurality of detector pixels which are arranged on a plane and can be evaluated separately from one another, wherein the optical device (11) spectrally splits the diverging radiation beam (10) in a first direction crosswise to the direction of propagation of the radiation beam (10) and directs it towards the detector (13). The optical device parallelizes the radiation beam before it strikes the detector (13) in a second direction crosswise to the direction of propagation in such a manner that adjacent rays in the second direction of the radiation beam striking the detector (13) are parallel relative to one another.
Abstract:
The present invention provides for a method of measuring an angle of rotation for urinalysis. Also, a polarimeter, which is reliable, compact and inexpensive is provided by using a polarimeter including means for transmitting the polarized light through a specimen, applying a magnetic field to the specimen and detecting the change in the direction of light polarization due to the application of the magnetic field.
Abstract:
A conduit system for an apparatus for screening materials is provided, wherein the conduit system comprises a sampling probe having an inner passage and an outer passage concentrically arranged around the inner passage. Moreover, a screening apparatus including the conduit system and a method of operating the apparatus are provided.
Abstract:
A first tunable wavelength pulse light source (22) is driven by a reference signal to emit a first optical pulse. An optical demultiplexer (24) demultiplexes a first optical pulse emitted from the first pulse light source (22) into a reference optical pulse and an incident optical pulse to be sent into an object to be measured. An optical multiplexer (26) multiplexes the reference optical pulse and an outgoing optical pulse passing through the object to output multiplexed light. A second pulse light source (23) generates a second optical pulse which is synchronous with the first optical pulse and delays a predetermined time for each period of the first optical pulse. A sampling unit (27, 27a, 27b) receives the multiplexed light and the second optical pulse to obtain an optical pulse train signal proportional to the intensity of the multiplexed light obtained in synchronism with the second optical pulse. From the optical pulse train signal from the sampling unit (27, 27a, 27b), a signal processor (37) obtains an envelope formed by peaks of individual optical pulses forming the optical pulse train. The wavelength dispersion of the object is obtained by measuring the delay time of the outgoing optical pulse passing through the object on the basis of intervals between the peaks of the envelope.
Abstract:
A distributed sensor (10) includes a plurality of stages (24, 28, 32, 36, 40) connected in series, each stage incorporating a length of polarization maintaining fiber (12) exposed to a phenomena such as mechanical deformation or temperature to be sensed. Inter-mode couplers are provided between the sensing fibers (26, 30, 34, 38) of the various stages. The overall transfer function of the device at a plurality of wavelengths is deconvoluted to determine the birefringence of each sensing region and does monitor plural phenomena independently of one another.
Abstract:
The invention relates to a method for imaging hand and/or finger lines with a camera which functions without contacting the skin with the recording device. By using linear or circular polarized light in the illuminating and imaging beam path, a separate representation of the upper and lower skin pattern is made possible. In doing this, an image of the skin relief which is rich in contrast is obtained. In addition, the information regarding the deeper lying skin layers through which blood flows can be obtained. An algorithm searches the skin pattern of the hand surface for line elements of different thicknesses and direction (vectors). The calculated numeric identification contains total frequencies of occurrence of vectors, amplitudes and phases of harmonic components of projections of vector images of both patterns. The method makes it possible to identify people from a distance, to completely protect the measuring device and to provide an improved security against deception.
Abstract:
A spectroscopic investigation system comprises: a source (LS) of a polychromatic beam of electromagnetic radiation (PPCLB); a polarizer (P); a stage (STG) for supporting a material system to be investigated; an analyser (A); at least one detector system (DET); and at least one compensator (C) (C') (C'') arranged to be continuously rotated during operation while said beam of electromagnetic radiation (PPCLB) passes therethrough. Said polychromatic beam of electromagnetic radiation is caused to interact with a material system (MS) on said stage (STG), pass through said analyser (A), and enter said at least one detector system (DET). The compensator comprises a combination of at least two zero-order wave plates (MOA, MOB), having their respective fast axes offset from zero or ninety degrees with respect to one another; or a combination of at least a first and a second effective zero-order wave plate (ZO1, ZO2), each effective zero-order wave plate comprising two multiple order wave plates (MOA1, MOA2, MOB1, MOB2) which are combined with the fast axes thereof oriented at substantially ninety degrees to one another; or a combination of at least one zero-order wave plate (MOA , MOB), and at least one effective zero-order wave plate (ZO2, ZO1).
Abstract:
A spectroscopic rotating compensator material system investigation system including a photo array (DE's) for simultaneously detecting a multiplicity of wavelengths is disclosed. The spectroscopic rotating compensator material system investigation system is calibrated by a mathematical regression based technique involving, where desirable, parameterization of calibration parameters. Calibration is possible of calibration parameters. Calibration is possible utilizing a single two-dimensional data set obtained with the spectroscopic rotating compensator material system investigation system in a "material system present" or in a "straight-through" configuration.
Abstract:
A distributed sensor (10) includes a plurality of stages (24, 28, 32, 36, 40) connected in series, each stage incorporating a length of polarization maintaining fiber (12) exposed to a phenomena such as mechanical deformation or temperature to be sensed. Inter-mode couplers are provided between the sensing fibers (26, 30, 34, 38) of the various stages. The overall transfer function of the device at a plurality of wavelengths is deconvoluted to determine the birefringence of each sensing region and does monitor plural phenomena independently of one another.