Abstract: A scanning ophthalmoscope (10) and method is provided for scanning the retina of an eye comprising a source of collimated light (12), a first scanning element (14), a second scanning element (16), scan compensation means (18), wherein the source of collimated light, the first and second scanning elements and the scan compensation means combine to provide a two-dimensional collimated light scan from an apparent point source, and the scanning ophthalmoscope further comprises scan transfer means (20), wherein the scan transfer means has two foci and the apparent point source is provided at a first focus of the scan transfer means and an eye (22) is accommodated at a second focus of the scan transfer means.

Abstract: A scanning opthalmoscope (10) and method is provided for scanning the retina of an eye comprising a source of collimated light (12), a first scanning element (14), a second scanning element (16), scan compensation means (18), wherein the source of collimated light, the first and second scanning elements and the scan compensation means combine to provide a two-dimensional collimated light scan from an apparent point source, and the scanning opthalmoscope further comprises scan transfer means (20), wherein the scan transfer means has two foci and the apparent point source is provided at a first focus of the scan transfer means and an eye (22) is accommodated at a second focus of the scan transfer means.

Abstract: A system for the placement of modular fill material forming co joined assemblies that promotes increased efficiency in fill material building methods by utilizing the capabilities of aerial conveyance devices, the pre-assembly of forms, the rapid bracing of forms, and the sequential placement of enclosure forms.

Abstract: A power supply (100) for producing a regulated output DC voltage from an AC voltage source (12) having at least one phase (14); a fullwave rectifier (16) coupled to the AC voltage source for producing a rectified output voltage potential, the fullwave rectifier having a number of pairs of diodes (D1-D6) equal to a number of phases of the AC voltage source; a number of pairs of magnetic amplifiers S1-S6 equal to a number of phases of the AC voltage source, each magnetic amplifier having a control input for varying an impedance between an input and an output in response to variation of a control signal; a control (36), responsive to the output voltage, for producing the control signal in response to the output voltage to cancel any variation in the output voltage from a regulated voltage; a fault detection circuit, responsive to an electrical load drawing current from the power supply for producing a shutdown signal; and a circuit, coupled to one of the magnetic amplifiers of each of the phases, responsive to t

Abstract: A transformer rectifier unit is provided for developing regulated DC output power from first and second sources of unregulated DC power. The transformer rectifier unit includes a transformer having a primary winding connectable to a source of AC input power and first and second secondary windings. The first secondary winding develops AC power at a first level and the second secondary winding develops AC power at a second level lower than the first level. First and second rectifier circuits are respectively coupled to the first and second secondary circuits for rectifying the AC power therefrom to DC power having corresponding first and second DC levels. A switch is coupled between an output of the first rectifier circuit and an output of the second rectifier circuit and is operable in first and second switching states to provide DC output power from one of the rectifier circuits to a load.