Abstract: A power supply for an image intensifier, the power supply including a DC voltage source generating a photocathode voltage; a bright source protection (BSP) resistor in series with the DC voltage source; and an oscillator in parallel with the DC voltage source and the BSP resistor, the oscillator providing an AC voltage component, the AC voltage component having a fixed pulse width, the AC voltage component being coupled to the photocathode by a diode, the pulse width and shape of the AC voltage component on the photocathode being determined by the photocathode current.

Abstract: Power supplies and methods for regulating performance of image intensifiers are disclosed. Performance is regulated by controlling the duty factor of the image intensifiers.

Abstract: The present disclosure provides a method of forming a flame retarded composite article using a halogen-free thermosetting composition comprising a benzoxazine compound, a monobenzoxazine monomer, and a naphthalene epoxy. The flame retarded composite article formed is especially suited for use in aerospace, automobile, rail and marine applications.

Abstract: The present disclosure provides a method of forming a flame retarded composite article using a halogen-free thermosetting composition comprising a benzoxazine compound, a monobenzoxazine monomer, and a naphthalene epoxy. The flame retarded composite article formed is especially suited for use in aerospace, automobile, rail and marine applications.

Abstract: The present disclosure provides a halogen-free thermosetting composition including a benzoxazine compound, a monobenzoxazine monomer, and a naphthalene epoxy. The halogen-free thermosetting composition is especially suited for use in aerospace, automobile, rail and marine applications.

Abstract: A brightness tracking system for an optical device includes a first imager for viewing a target of interest, a second imager for viewing the same target of interest, and a photodiode circuit. The photodiode circuit (a) measures brightness levels of the target of interest received from the first imager, and (b) controls output brightness of the second imager, based on the measured brightness levels received from the first imager.

Abstract: A power supply for an image intensifier, the power supply including a DC voltage source generating a photocathode voltage; a bright source protection (BSP) resistor in series with the DC voltage source; and an oscillator in parallel with the DC voltage source and the BSP resistor, the oscillator providing an AC voltage component, the AC voltage component having a fixed pulse width, the AC voltage component being coupled to the photocathode by a diode, the pulse width and shape of the AC voltage component on the photocathode being determined by the photocathode current.

Abstract: The present disclosure provides a halogen-free thermosetting composition including a benzoxazine compound, a monobenzoxazine monomer, and a naphthalene epoxy. The halogen-free thermosetting composition is especially suited for use in aerospace, automobile, rail and marine applications.

Abstract: A gating module for gating an image intensifier tube. The gating module includes a frequency generator generating a base signal having a base frequency. A modulator spread-spectrum modulates the base frequency of the base signal to generate a modulated signal. A gating circuit coupled to the modulator generates a gating signal in response to the modulated signal.

Abstract: A battery housing for use with a night vision device. The housing is arranged to carry a single, easily replaceable battery and is carried by an electronic device such as a night vision device.

Abstract: A battery housing for use with a night vision device. The housing is arranged to carry a single, easily replaceable battery and is carried by an electronic device such as a night vision device.

Abstract: A light transmitting device for use in a viewing apparatus or optical device, particularly a night vision device. The device is composed of a material which is capable of transmitting light from a remote source. Light from a visible indicator such as an LED is transferred through at least one outer flat to an inner flat of the device. The inner flat provides a signal to the user that the power supply is low. An additional outer flat and inner flat provides a signal to the user that the infrared illuminator is in operation. A projection formed along the outer periphery of the device prevents rotation and aids in assembling the device in a viewing apparatus. With the light transmitting device, there is no need for a separate device attached to the housing of an optical device for indicating power supply.