Systems and methods for accurate measurement and real-time feedback of solar ultraviolet exposure for management of ultraviolet dose. The systems can include a wearable device including a proximity sensor, the proximity sensor used to initiate an alert that the proximity sensor is covered. The systems can include a visible light sensor, the visible light sensor used to enter into a sleep, or night, mode.

A sensor module for a lighting fixture includes a module housing configured to be mounted to a lighting fixture, a light sensor mounted in the module housing, and a sensor cover over the light sensor. The sensor cover includes a first surface oriented to face a task surface within an area of interest, and a second surface opposite the first surface. The first surface includes a first Fresnel lens having a number of Fresnel ridges oriented in a first direction. The second surface includes a second Fresnel lens having a number of Fresnel ridges oriented in a second direction, which is different from the first direction. Providing the first Fresnel lens and the second Fresnel lens with differently oriented Fresnel ridges allows the sensor cover to focus light from a relatively large portion of the task surface to the light sensor while remaining small.

The present system provides a sensor clip system that can be clipped to luminaires of a plurality of shapes and sizes and method of using the sensor clip. Some of the sensors are upward looking (into the luminaire) while others are downward looking (away from the luminaire); and thus face in substantially opposite directions. The sensor clip is adjustable in one, two or three dimensions to be able to easily fit with different sized and shaped luminaires, such that the upward looking sensors may face the incoming light and downward looking sensors face away from the light. The sensor clip system may also provide attenuation of the luminous intensity of the emitted light coming out of the luminaires and extends the longevity and usability of the embedded sensor.

A sensor is disclosed that provides measurements in multiple degrees of freedom without significantly increasing size, complexity, or cost. The sensor can include a light component in support of a first light source operable to direct a first beam of light, and a second light source operable to direct a second beam of light. The sensor can also include an imaging device that can directly receive the first beam of light and the second beam of light and convert these into electric signals. The imaging device and the light component can be movable relative to one another. The sensor can further include a light location module and/or a position module configured to receive the electric signals and determine locations of the first beam of light, the second beam of light on the imaging device and a relative position of the imaging device and the light component.

An optical filter including a base member having a layer containing near-infrared absorbing fine particles and a dielectric multilayer film, the optical filter satisfying a requirement that, in a wavelength range of 400 nm to 650 nm, an average of transmittance of any of light incident from a direction perpendicular to the optical filter, light obliquely incident at an angle of 30 degrees, and light obliquely incident at an angle of 60 degrees is 45% or higher and lower than 85%; and a requirement that, in a wavelength range of 800 nm to 1,200 nm, an average of optical density (OD value) of any of light incident from the direction perpendicular to the optical filter, light obliquely incident at an angle of 30 degrees with respect to the perpendicular direction, and light obliquely incident at an angle of 60 degrees with respect to the perpendicular direction is 1.7 or higher.

A light projector and a light receiver each include a case body, a light transmission plate closing an opening in a front face of the case body, caps closing openings in end faces of the case body, and cap covers attached slidably to each cap. The case body includes first supports partially supporting side edges of the light transmission plate, the caps respectively include second supports supporting ends of the light transmission plate, the light transmission plate is supported by the first and second supports with an elastic member interposed between the light transmission plate and the first and second supports, the cap cover includes a pressing unit pressing the ends of the light transmission plate toward the second supports, and second engagement units engaging with each other to maintain a state where the pressing unit presses the light transmission plate are provided in the cap and the cap cover.

An apparatus includes a lens assembly and a printed circuit board. The lens assembly may be configured to provide at least four orthogonal optical paths and a central atrium. The printed circuit board may be disposed below the lens assembly and generally comprises an antenna and ground plane on a front surface of the printed circuit board, and a first emitter, a second emitter, a first detector and a second detector mounted on the printed circuit board. The antenna is generally aligned with the central atrium. The first emitter is generally located between a first pair of the four orthogonal optical paths. The second emitter is generally located between a second pair of the four orthogonal optical paths. The first detector is generally located between a third pair of the four orthogonal optical paths. The second detector is generally located between a fourth pair of the four orthogonal optical paths.

A system for solar disinfection of fluid. One most preferred version of the system includes: (a) A UVTC, made of a polyethylene laminate film with an approximately rectangular plan, providing: a. A first compartment. b. A second compartment for holding fluid, with a port to fill and dispense. (b) A Disinfection Monitor Module (DMM) located in the first compartment which: a. Includes at least one sensor to measure radiation intensity. b. Provides at least one user interface: c. Contains a wireless communication interface. d. Operates according to a process that ensures sufficient cumulative exposure of the contained fluid to solar UV to achieve adequate solar disinfection. Alternative embodiments may also include sensors to detect additional characteristics, such as transmittance, turbidity, combined transmittance, and/or temperature.

A detection device includes: a first sensor which detects, based on a captured image, whether a person is present in a first detection range; a plurality of second sensors which are disposed around the first sensor, and detect, based on infrared radiation, whether a person is present in respective second detection ranges each of which overlaps at least a portion of the first detection range; and at least one hood which blocks part of infrared radiation directed to at least one of the plurality of second sensors, to reduce a non-overlapping portion of a combined detection range of the first detection range of the first sensor and the second detection ranges of the plurality of second sensors, the non-overlapping portion being a portion in which the first detection range and the second detection ranges do not overlap.

A signal guide for a sensor device is disclosed herein. The signal guide can include a base having a first proximal aperture, where the first proximal aperture has a first cross-sectional profile, where the first proximal aperture is configured to be disposed proximate to a first transceiver element of the sensor device. The signal guide can also include a body disposed adjacent to the base, wherein the body comprises a first main channel that adjoins the first proximal aperture. The signal guide can further include a distal end disposed adjacent to the body opposite the base, where the distal end includes a first distal aperture that adjoins the first main channel, where the first distal aperture has a second cross-sectional profile, where the first distal aperture is configured to be disposed proximate to an ambient environment.