Abstract: A lens assembly is provided for use with a flashlight or similar apparatus, the lens assembly provides separate optimization of a first beam of light and a second beam of light. The lens assembly is adapted for use in multiple LED applications, such as the use of white and infrared light beams in a single flashlight apparatus.

Abstract: A portable infrared (IR) detection system can be used to scan an adjacent terrain and detect an IR source, such as a person or animal, by detecting heat emitted therefrom. Humans, animals and other sources emit IR radiation which can be detected by an IR detector. The emitted radiation is captured by a tube and reflected onto a sensor using a parabolic or other reflector. The sensor is connected to a display component for producing an audible, visual, or vibrational alert. Activities such as hunting, boating, and camping, often accompany situations where detection of a human, animal, or other heat source can be a valuable tool. This invention provides a portable IR detection system for use in these and other activities, the portable detection system being collapsible, portable and cost-efficient.

Abstract: A step-up/step-down switching regulator control method for a regulator having an inductor with first and second leads, a first switch for controllably coupling the first lead to a source of power, a first device between the first lead and a circuit ground, a second switch for controllably coupling the second lead to the circuit ground, and a second device between the second lead and a regulator, the method comprising operating the switches in a sequence of phases when the source of power has a voltage exceeding the regulator output and in the same sequence of phases when the source of power has a voltage less than the regulator output, the phases being phase 1 with the first and second switches closed, phase 2 with the first switch closed and the second switch open, and phase 3 with both switches open. The first and second devices may be switches or diodes. Various embodiments are disclosed.