Abstract: An electronic image-encoder with an SEC vidicon in which the electron beam is positioned according to a coordinate pair stored as digital signals and applied as analog signals to the deflection coils of the vidicon. This permits the beam to read selected points on the vidicon target and the beam is blanked until the desired deflection signals are applied.In one version of the device, the deflection signals are simply voltages corresponding to the values of the digital signals. In another version, one digital signal is converted to an analog deflection voltage and a standard ramp is used as the other deflection voltage, the beam being turned on to read only after a time interval following initiation of the ramp, which interval is proportional to the other digital signal.A special application of the encoder incorporates a crossed-dispersion optical system for projecting several stacked spectral orders into the vidicon target.

Abstract: An incandescent radiation lamp features a novel design which provides for an infrared beam of higher radiance than similar lamps. The higher radiance beam is accomplished by a surrounding reflective screen which internally focuses the generated radiation back upon the bulb filament of the lamp. The focused radiation is then redirected by reflection from the filament, and is emitted from the lamp as an intensified beam through a small window in the surrounding reflective screen.An added benefit of the new design is the improvement in the thermal efficiency of the lamp, so that less power is required for its operation.

Abstract: Antigen-detecting reagents, suitable for detection of antigens present in liquids, biological fluids and tissues are prepared by covalently linking a large number of fluorescent dye molecules to the appropriate antibody through a polymeric backbone possessing reactive functional groups along the length of the chain.

Abstract: Reagents for the detection of specific reactants, such as antigens in biological fluids, comprising a polymer coupled to an antibody, the polymer having a plurality of dye molecules coupled thereto. The reagent is prepared by covalently linking an end functional group of polymers such as polyethylene amine to an antibody, typically through an aldehyde linkage, the polymer molecule having had a plurality of dye molecules, coupled to the polymer through side reactive sites.

Abstract: A device for generating a multiplicity of proportionally diluted samples from a parent solution, which device has a plurality of chambers so connected that as the system is oscillated about a single axis, a proportional part of the fluid in each chamber is sampled and delivered to the next chamber.

Abstract: A system for identifying within a mixed population, a group of microorganisms replicating in a culture medium specific to that group, which culture medium includes a fluorescence inhibitor which the group incorporates in their nucleic acid upon replication.In one embodiment, a sample of the microorganism population is dyed with two different fluorescent dyes which are specific to nucleic acid, the fluorescent emissivity of one of the dyes being reduced or quenched by the presence of the inhibitor in the dyed nucleic acid, the fluorescent emissivity of the other of the dyes being unaffected by the presence of the inhibitor. The ratio of intensities of the fluorescent emission from the two dyes is independent of the total nucleic acid content of each microorganism, but is dependent upon the extent of incorporation of the inhibitor into the nucleic acid, so serves as a marker or identifier of a replicated organism.

Abstract: An improved system is desired for examining fluorescent material. The method comprises the steps of illuminating material with radiation at a fluorescent excitation wavelength of said material and at an intensity sufficient to cause bleaching of the material; detecting over a time interval commencing with initial illumination of the material, fluorescent emission produced by the material during bleaching of the latter by the radiation; and integrating over the interval the fluorescent emission detected during the bleaching of the material. Means are provided for illuminating the material to cause bleaching, for detecting fluorescent emission produced during bleaching, for measuring the decay time interval, and for integrating a signal from the detecting means over a time interval.

Abstract: An improved system is described for providing approximately equalized illumination at all points between first and second opposite portions of a total internally reflecting cell. The system comprises in addition to the cell, a source of radiation of at least one selected wavelength, means for directing the radiation along a plurality of paths, and means for introducing the radiation in at least two of the paths into first and second opposite portions of the cell. Means can be provided for varying the penetration angle of the radiation into the cell.