CPC Class H04N

A porthole, a porthole plug in a vehicle, and an aircraft with portholes are provided. The porthole includes an opaque plug with an aperture therethrough. A camera is arranged with a lens aligned with the aperture.

A wavelength conversion member includes a light-reflecting member configured to reflect laser light, and a phosphor-containing layer disposed on the light-reflecting member. The phosphor-containing layer includes one or more projecting portions each configured to be irradiated with laser light. An area of each projecting portion is larger than an area of a spot of the laser light in a plan view. A light source device includes the wavelength-converting member and one or more laser elements. The wavelength-converting member is arranged at a position so that laser light emitted from the one or more laser elements are irradiated on a corresponding one of the one or more projecting portions.

The present invention realizes a light source unit and a method of cooling the light source unit that reduces any increase in the ambient temperature of a red solid-state light source and thus reduces any decrease in brightness of the red solid-state light source. The light source unit has: a wall having a window, the wall being provided between a light tunnel-side circulation unit that accommodates a light tunnel that is irradiated by the output light of a solid-state light source and a phosphor wheel-side circulation unit that accommodates a phosphor wheel that is excited by the emitted light of the light tunnel; a light tunnel-side heat-receiving heat sink that is provided in the light tunnel-side circulation unit; a phosphor wheel-side heat-receiving heat sink provided in the phosphor wheel-side circulation unit, a heat-radiating heat sink that is connected to the light tunnel-side heat-receiving heat sink and to the phosphor wheel-side heat-receiving heat sink by means of a heat pipe; and a cooling fan that cools the heat-radiating heat sink.

An optical module includes a transparent substrate and a refractive optical element mounted on the substrate. A conductive heating trace is deposited on the substrate around the refractive optical element. A temperature sensor senses a temperature of the substrate. Control circuitry is coupled to the temperature sensor so as to measure a difference between the temperature of the substrate and a target operating temperature of the module, and to drive a current through the conductive heating trace, responsively to the difference, so as to heat the substrate to the target operating temperature.

A firearm safety system processes images of a shooter and/or a target, and determines whether to lock or unlock a firearm based on a result of the processing. An image capturing device mounted on the firearm captures images of a shooter and a target. A storage media includes images of authorized users of the firearm, and images of targets not be shot at (“do-not-shoot” targets). A microprocessor compares the shooter image with images of the authorized users, and/or the target images with images of the do-not-shoot targets. The firearm is locked when (a) the shooter image does not match an image of any authorized user or (b) the target image matches an image of any do-not-shoot target. The firearm is unlocked when (a) the shooter image matches an image of any authorized users and (b) the target image does not match an image of any do-not-shoot target.