Abstract:
A reagent card analyzer comprises an optical signal source configured to transmit an optical signal and an optical signal detector spaced a distance from the optical signal source to define an optical signal path into which the optical signal is transmitted, the optical signal detector configured to detect the optical signal and to output an electrical signal indicative of the optical signal. A reader is configured to read a reagent pad of a reagent card. A reagent card moving mechanism is configured to move the reagent card having the reagent pad including a leading and trailing end through the optical signal path. An optical detector interface is electrically coupled with the optical signal detector and configured to receive electrical signals and to output a pad detect signal indicative of at least one of the leading and the trailing end as the reagent card is moved through the optical signal path.
Abstract:
A device for use in the detection of binding affinities, the device comprising a planar waveguide (2) arranged on a substrate (3), and further comprising an optical coupler (41) having a predetermined length for coupling coherent light (1) of a predetermined wavelength into the planar waveguide (2) such that a parallel beam of coherent light propagates through the planar waveguide (2) with an evanescent field (11) of the coherent light propagating along an outer surface (21) of the planar waveguide (2). The outer surface (21) of the planar waveguide (2) comprises binding sites thereon capable of binding target samples to the binding sites such that light of the evanescent field (11) is diffracted by target samples bound to the binding sites. The binding sites are arranged along a plurality of predetermined straight lines (7) running parallel to one another with a constant distance between adjacent straight lines. The predetermined straight lines (7) are arranged at an angle relative to the direction of propagation of the evanescent field (11) such that the coherent light (12) diffracted by the target samples bound to the binding sites impinges under a diffraction angle relative to the straight lines onto a further optical coupler (8) arranged in a portion (10) of the planar waveguide (2) outside the beam of coherent light propagating through the planar waveguide. The further optical coupler (8) couples the diffracted coherent light (13) out of the planar waveguide (2) such as to interfere at a predetermined detection location (9) with a difference in optical path length which is an integer multiple of the predetermined wavelength.
Abstract:
A device and method solves the problems of improving precision, in particular in reducing movement of a cuvette, particularly lateral or side to side movement (L) of a cuvette (50), during the measurement process. The device, which stabilizes a cuvette (50) during a measurement read in an analyzer having a cuvette path of travel (P), includes: a fixed support (30) located on a first side of the path of travel (P) and abutting a side of the cuvette (50) at a location that does not interfere with an optical window on the cuvette (50) on which the measurement read takes place; and a movable support (20) located on a second side of the path of travel (P) and biased against a side of the cuvette (50) at a location that does not interfere with the optical window on the cuvette (50) on which the measurement read takes place, and which is opposite the side abutting the fixed support (30).
Abstract:
A luminometer for assaying bioluminescence and chemiluminescence reactions characterized by sample wells having transparent bottom walls, a light detector positioned beneath the sample wells and a reagent injector above the wells.
Abstract:
A device for determining the erythrocyte sedimentation rate (ESR) of blood samples comprises receiving means (4) for receiving blood sample tubes (3) at a number of fixed positions therein, measuring means (16) for detecting blood sample tubes placed in the receiving means and measuring ESR's of blood samples driving means (10-12) for driving the measuring means horizontally along the number of fixed positions of the receiving means, and a computer unit. The computer unit is provided with timing means for providing a position-related control signal for each identified blood sample tube when a predetermined time period has elapsed since the blood sample tube was placed in the receiving means. A control means is used to determine the position of newly placed blood sample tubes in the receiving means and for controlling the measurement of the ESR's. The measuring means may comprise a CCD-image pick-up (13) or a single optical sensor. An output means is provided with a same plurality of two colour LED's as the plurality of fixed positions in the receiving means. The device may comprise a bar code reader.
Abstract:
A multibeam photometric measuring device includes a light assembly (12) comprising a single modulated light source along with a filter assembly (19) for passing only a desired band of wavelengths and an optical system for suitably focusing light from the light source. A fiber rotor arrangement (24) is provided for sequentially connecting the collimated light source to each of the plurality of fibers (34) disposed in a distributor (32). Light passing through the wells of the sample plate (40) is captured by discrete photodetector cells (44) disposed on a one-to-one correspondence opposite the wells of the plate. A reference fiber links (52) light from the light source to a separate photodetector (45) to provide a reference light signal with which the sensed photodetector signals are compared. The sensed signals are suitably multiplexed and processed by circuitry which allows control over the accuracy with which the signals are processed on the basis of their instantaneous strengths as well as reference readings taken during system initialization. Enhancement of colour distribution resulting from chromogenic reactions is provided by automatic agitation by mechanism (54) of the reacting agents within the sample wells before a reading is taken at each of the sampling intervals of a kinetic measurement sequence.
Abstract:
A multibeam photometric measuring device includes a light assembly (12) comprising a single modulated light source along with a filter assembly (19) for passing only a desired band of wavelengths and an optical system for suitably focusing light from the light source. A fiber rotor arrangement (24) is provided for sequentially connecting the collimated light source to each of the plurality of fibers (34) disposed in a distributor (32). Light passing through the wells of the sample plate (40) is captured by discrete photodetector cells (44) disposed on a one-to-one correspondence opposite the wells of the plate. A reference fiber links (52) light from the light source to a separate photodetector (45) to provide a reference light signal with which the sensed photodetector signals are compared. The sensed signals are suitably multiplexed and processed by circuitry which allows control over the accuracy with which the signals are processed on the basis of their instantaneous strengths as well as reference readings taken during system initialization. Enhancement of colour distribution resulting from chromogenic reactions is provided by automatic agitation by mechanism (54) of the reacting agents within the sample wells before a reading is taken at each of the sampling intervals of a kinetic measurement sequence.