A photodetector including: a case including a light receiving surface provided on an upper surface and having a first region that transmits visible light and a second region that transmits less visible light than the first region; a printed circuit board provided to face the light receiving surface; and a plurality of electronic components provided on a light receiving surface side of the printed circuit board and including a first light receiving element configured to detect visible light. The first light receiving element is disposed at a first position of the printed circuit board exposed to the visible light transmitted through the first region. The number of mounted electronic components disposed at the first position is smaller than the number of mounted electronic components disposed at a second position of the printed circuit board other than the first position.

An electromagnetic radiation detector includes an InP substrate having a first surface opposite a second surface; a first InGaAs electromagnetic radiation absorber stacked on the first surface and configured to absorb a first set of electromagnetic radiation wavelengths; a set of one or more buffer layers stacked on the first InGaAs electromagnetic radiation absorber and configured to absorb at least some of the first set of electromagnetic radiation wavelengths; a second InGaAs electromagnetic radiation absorber stacked on the set of one or more buffer layers and configured to absorb a second set of electromagnetic radiation wavelengths; and an immersion condenser lens formed on the second surface and configured to direct electromagnetic radiation through the InP substrate and toward the first InGaAs electromagnetic radiation absorber and the second InGaAs electromagnetic radiation absorber.

A sealing system (20) for an optical sensor of a turbine engine that diverts and exhaust seal leakage away from the seal (22, 24) to prevent ingestion of humid air through the seal (22, 24) is disclosed. The sealing system (20) may include inner and outer optical housings (26, 28) with first and second seals (22, 24) positioned there between separating inner and outer optical housings (26, 28) radially. The sealing system (20) may include one or more leakage manifolds (30) positioned between the first and second seals (22, 24) and containing one or more manifold rings (32). The manifold ring (32) may be positioned between and in contact with the first and second seals (22, 24) enabling the first and second seals (22, 24) to form a double seal. The manifold ring (32) may also be configured to capture leakage air that has seeped past the first seal (22) and exhaust that leakage air through one or more exhaust vents (34) in the outer optical housing (28) before leaking through the sealing system (20).

A pyranometer, comprises a thermal sensor, and a diffusing member positioned so as to be opposed to a receiving surface of the thermal sensor.

A photodetector of the invention is characterized by having a plurality of detector elements that are arranged over a light-transparent substrate and are connected in parallel. A foldable portable communication tool having two display portions of the invention is characterized by including one photodetector which includes a plurality of detector elements connected in parallel.

A photoelectric sensor retainer and a photoelectric pulse wave measuring apparatus including the same are provided. The photoelectric sensor retainer includes a sensor mounting unit on which a photoelectric sensor having a light-receiving surface is attachable and detachable, the light-receiving surface facing a measuring direction. The photoelectric sensor retainer further includes a pressing unit configured to press an upper surface of the sensor mounting unit in the measuring direction to apply pressure to the sensor mounting unit, and a pedestal including a seating plate configured to support the pressing unit, the seating plate having a principal plane perpendicular to a pressing direction of the pressing unit.

A system for measuring light intensity of a specific location and wirelessly transferring the light intensity data contains at least one light intensity sensing assembly and a computing device. The light intensity data is recorded by the light intensity sensing assembly and is wirelessly transferred to the computing device. The light intensity sensing assembly contains a dome lens, a photocell, a processing unit, a wireless data-transferring module, and a portable power source. The photocell is centrally mounted within the dome lens in order to receive a maximum amount of light. The photocell is electronically connected to the processing unit. In order to transmit the light intensity data, the processing unit is electronically connected to the wireless data transfer module. The photocell, the processing unit, and the wireless data-transferring module are powered by the portable power source.

A method for calculating a rate of UV radiation absorbed by a user's skin including: capturing image data of an area of the user's skin; determining a skin tone of the user's skin based on the captured image data; calculating a rate of UV radiation absorption for the determined skin tone; measuring an amount of UV radiation exposed to the user's skin; and calculating a rate of UV radiation that would be absorbed by the user's skin based on the user's skin tone and the amount of UV radiation exposed to the user's skin. The method can further comprise calculating an amount of time that the user can be exposed to the amount of UV radiation exposed to the user's skin based on predetermined criteria. The predetermined criteria can at least include an SPF level of sunscreen applied to the user's skin.

An improved case for use with a computing device provides at least one sensor, preferably for use with a processor of the computing device. For many embodiments, the computing device has a storage configuration with the computing device located below an upper surface of the case and a lifted configuration with the computing device supported at an angle alpha with a portion extending above the upper surface of the case.

An optical detecting device has gas emission and pressure reduction function and includes a holder, a light penetrating component, a light detecting component, a hole structure, and a. The light penetrating component is disposed on the holder to form an accommodating space whereinside the light detecting component is disposed. The hole structure is formed on the holder to connect with the accommodating space. The waterproofing and ventilating component is disposed on the holder and covers the hole structure to prevent liquid from leaking into the accommodating space via the hole structure. While an inner gas pressure of the accommodating space is decreased, part of the gas is exhausted from the accommodating space via the hole structure and the waterproofing and ventilating component.