Abstract: An acousto-optic device is shown which permits the use of a temperature sensitive solid state laser. The laser is mounted in a heat sink that displaces the laser as a function of temperature in a direction which cancels the drift of the laser's blur spot due to the laser's increased wavelength as a function of temperature.

Abstract: A system is shown which receives several radio frequency (RF) signals and applies these signals to a Bragg cell through which a beam of coherent light is passed and diffracted into several first order beamlets. The diffraction angle of the beamlets is a function of the frequency of the RF signals. The beamlets are amplified in an amplifier having a fast response time to match the response time of the system. Fiber optic bundles are provided at the input and output of the amplifier to guide the beamlets from a linear pattern into an areal pattern and to spread the beamlets for a more efficient use of the amplifier. The amplified beamlets are then formed into a linear pattern and applied to a photodetector to determine the frequency of the RF signals.

Abstract: A device for detecting the centroid of a beam of electromagnetic energy is shown including means for focusing the beam into a blur spot upon a focal plane. Photodetectors located at the focal plane detect the centroid of the blur spot on either side of its nominal location. The intensity of the output from each photodetector is then measured and the difference and sum of these measurements obtained. By dividing the difference by the sum of the resultant signals, it is possible to produce an analog signal which represents the location of the blur spot centroid regardless of its amplitude. This arrangement has particular application in acousto-optic devices for measuring the frequency and direction of arrival of an incoming radio frequency wave.

Abstract: An acousto-optic deflector is shown which diffracts a beam of incident light from a zero order beam into a first order beam. Normally such diffraction deflects but 1% of the light energy within the incident beam. This deflection may be improved by successive, internal transits of the light beam across the acoustic energy wave within the deflector. Such internal transits are accomplished by forming the deflector into a cylinder and reflection coating the outer surface of that cylinder to form a mirror pair.

Abstract: An acousto-optic deflector or modulator is shown which diffracts a beam of incident light from a zero order beam into a first order beam. Normally such diffraction deflects but 1% of the light energy within the incident beam. This deflection may be improved by successive transits of the light beam across the acoustic energy wave within the deflector.

Abstract: An automated immunoassay apparatus which provides: time controlled incubation of a multiplicity of sample solutions, each of which comprise a mixture of (a) a sample, possibly containing an antigen or antibody intended to be assayed; (b) a solution of a known concentration of a tagged antigen or tagged antibody; and when assaying for antigen, optionally; (c) a solution of a known titer of an antibody reactable with said antigen;Isolation of incubated samples from additional sample solutions introduced into said apparatus for assay, whereby the system is isolated at a first predetermined signal from a timing device, and whereby the system is reconnected at a second predetermined signal from the timing device, wherein the second predetermined time period is set so as to enable sufficient time to complete a measurement of the amount of tagged material before the next incubated sample arrives in the detector for the next sequential measurement.

Abstract: In a method for effecting immunoassay of a multiplicity of samples, each possibly containing an antigen or an antibody to be assayed, wherein each sample is incubated with a solution containing a detectable antigen or antibody to form a multiplicity of mixtures, each mixture containing as components complexed antigen-antibody, non-complexed antigen and non-complexed antibody, separating at least one of the components of said mixture by adsorption and thereafter detecting the quantity of detectable antigen or antibody, in one of the non-adsorbed portions of the mixture,The improvement which comprises continuously and sequentially separating at least one component intended to be separated from each of said multiplicity of mixtures byPassing a first mixture from said multiplicity of mixtures over an adsorbent which adsorbs the components intended to be separated from said mixture,Removing from said adsorbent the non-adsorbed portion of said mixture, andRepetitively passing each next succeeding mixture from said

Abstract: An automated radioimmunoassay apparatus which comprises:Means for time controlled incubation of a multiplicity of sample solutions, each of which comprise a mixture of (a) a sample, possibly containing an antigen, intended to be assayed, (b) a solution of a known concentration of an antigen tagged with a radioactive isotope and (c) a solution of a known titer of an antibody reactable with said antigen;Radioactivity detector means for providing a kinetic measurement of radioactivity as a solution is continuously passed therethrough, and for providing a static measurement of radioactivity as a solution is maintained statically within said detector;Means for introducing said incubated sample into said radioactivity detector means;Timing means, which is activatable by said radioactivity detector means when said detector means detects a predetermined threshold of radioactivity, for measuring time sequences and for generating control signals at predetermined time sequences;Recording means coupled to said detector m