A flame detector that includes a spacer, a UV transparent window, and a UV sensing elements. The spacer has a spacer wall that extends along a first axis between a first spacer end and a second spacer end. The UV transparent window is disposed at the first spacer end. The spacer wall and the UV transparent window define a gas space. The UV sensing elements is disposed within the gas space.

An artifact caused by secondary reflection is reduced. An imaging device according to an embodiment includes: a diffuser (110) that converts incident light into scattered light whose diameter is expanded in accordance with a propagation distance and outputs the scattered light; and a light receiver (132) that converts light diffused by the diffuser into an electric signal.

This disclosure is related to a sensor and a mobile object. The mobile object may include a housing having a light-transmitting portion; a light receiving element inside the housing; and a light guide member inside the housing. The light guide member may be configured to guide light transmitted through the light-transmitting portion to the light receiving element.

Disclosed herein is a particular type of fiber-optic, high-speed, balanced detector array designed to have very low artifacts, compact design, and low cost. The design is easily expandable to multiple channels of individual or detector pairs and the addition of transimpedance amplifiers to amplify the detected optical signals. The bandwidth of these devices is currently in the range up to 10 GHz with higher speeds being conceivable.

A cover mountable over a sensor includes a hood and a baffle. The cover is adapted to create a barrier between the sensor and ambient light. The hood surrounds an interior volume for receiving the sensor. The baffle has a sidewall that surrounds an opening providing access to the volume.

A sensor device includes a housing, a substrate positioned within the housing, at least one radiative antenna element positioned upon a first surface of the substrate, and a processing section positioned in a stacked arrangement with the substrate, opposite a second surface of the substrate. The substrate includes at least one interruption configured to allow light entering the housing to pass through the substrate from the first surface through the second surface. The antenna elements(s) is positioned upon the substrate so as to avoid the interruption(s). The processing section includes light-responsive circuitry and is configured such that the circuitry is positioned so as to receive light entering the housing through the at least one aperture. The substrate may be generally circular, substantially rigid, have a substantially certain radius between about three-fourths inch and about four inches, and have a substantially certain thickness between about 0.05 inches and about one-half inch.

An optical package assembly can include: a first circuit board; a second circuit board and a first structure arranged on the first circuit board, where the second circuit board is adjacent to the first structure; and a second structure arranged on the second circuit board, where a thickness of the first structure is equal to a combined thickness of the second circuit board and the second structure.

A sensor module includes: a sensor carrier for accommodating a sensor; and a housing having two coaxial cylindrical holders in which cylindrical ends of the sensor carrier are mounted to rotate around an axis. The sensor module fixes the sensor carrier in an adjustable angular position relative to the housing by producing a force-fitting or form-fitting connection between the housing and an outer surface region of the sensor carrier.

A daylight sensor for automated window-shading applications that incorporates at least one (and optionally more than one) of three aspects: an optimized Field-of-View (FOV), angle-diversity sensing (via at least two sub-sensors with different FOVs, whose outputs are processed in a particular way to yield the overall sensor output), and multi-spectral sensing (via at least two sub-sensors with differing spectral responses and, optionally, different FOVs, whose outputs are processed in a particular way to yield the sensor output). These aspects improve the correlation between the sensor output and the subjectively-perceived daylight level (especially under glare-inducing conditions, such as in the presence of low-angle direct sunlight), thereby enabling more effective automatic control of daylight admitted into a room.

The present invention achieves a multiple-optical-axis photoelectric sensor which can be assembled with reduced effort. A multiple-optical-axis photoelectric sensor (100) includes a light projector (110) and a light receiver (120) each having an outer shape defined by a housing (1) including: an outer case (10); a light-transmitting plate (15); and a pressing member (20). Supporting parts (11b) are provided at respective inner surfaces of side plates of the outer case. Extending parts (11c) are provided at end parts of the corresponding side plates. The pressing member is configured to press the light-transmitting plate against the supporting parts by being attached to the respective extending parts.