Disclosed are examples of optical/electrical devices including a variable TIR lens assembly having a transducer, an optical lens and an electrowetting cell coupled to an exterior wall of the lens. The electrowetting cell contains two immiscible liquids having different optical and electrical properties. One liquid has a high index of refraction, and the other liquid has a low index of refraction. At least one liquid is electrically conductive. A signal causes the high index of refraction and the low index of refraction liquids to assume various positions within the electrowetting cell along the exterior wall. The properties of the optical lens, e.g. its total internal reflectivity, change depending upon the position of the respective liquids along the exterior wall. The light detection characteristics of the assembly change to receive an input light beam over a range of inputs or over a range of fields of view.

A device and a method for detecting a light irradiating angle are disclosed. The device, used to detect the incident direction of a light ray, includes a solar sensor and a processor. The sensing unit of the solar sensor has sensing areas. The sensing areas correspondingly generate sensing signals based on the intensity of the light ray. A mask covers the sensing unit and has an X-shaped light transmitting portion. The light ray transmits the X-shaped light transmitting portion to form an X-axis light ray and a Y-axis light ray. The X-axis light ray intersects the Y-axis light ray. The X-axis light ray and the Y-axis light ray fall on the sensing area. The processor, coupled to the sensing unit, receives the sensing signals and determines information of the incident direction according to the sensing signals.

A radiance sensor includes a memory and a microprocessor. The memory stores non-transitory computer-readable instructions and adapted to store a plurality of electrical signals output from a photodetector array in response to electromagnetic radiation transmitted through a lenslet array and incident on the photodetector array. The microprocessor is adapted to execute the instructions to (i) determine irradiance of the electromagnetic radiation in a detector plane from the plurality of electrical signals, each electrical signal having generated by a respective one of a plurality of photodetectors of the photodetector array, and (ii) reconstruct, from the determined irradiance, the 4D-radiance in an input plane, the lenslet array being between the input plane and the detector plane.

An aquarium photometer system includes a housing unit, an arm, and a mirror. The housing unit includes a light sensor configured to sense light incident on the light sensor and to convert the incident light to a signal. The housing unit also includes an operational amplifier including a first input node, a second input node, and an output node. The operational amplifier is configured to: receive the signal at the first input node, amplify a difference between the signal at the first input node and a signal at the second input node by a gain factor, and output the amplified signal on the output node. The housing unit also includes a potentiometer connected to the operational amplifier and configured to regulate the amplified signal; and a display connected to the potentiometer and configured to show an intensity of light detected by the light sensor based on the regulated amplified signal. The arm at a first end is connected to the housing unit and configured to move the housing unit around an aquarium case. The mirror is located on a bar and positioned within the aquarium in front of the light sensor and at a focal distance from the light sensor and configured to increase an amount of light incident on the light sensor.

An electro-optical assembly, in particular a sensor assembly for detecting ambient light, includes a reflection surface, a lens body and an electro-optical component, in particular a light receiver. The component includes a depression having a main lens section, in particular a diverging lens section with a concave interior wall, and a converging lens section with a convex interior wall. The interior wall of the converging lens section is formed in such a way that the rays of the ray path which travel through the converging lens section to the electro-optical component hit the reflection surface in such way that the angle of incidence at the reflection surface is larger or the same as the critical angle of the total internal reflection at the reflection surface. In another aspect a method for detecting ambient light is described.

A system and method for preventing sight deterioration caused by prolonged use of electronic visual displays in low-light conditions is provided. The system includes a camera directed towards a user, a processing circuitry, control circuitry and, optionally, a light sensor. The processing circuitry determines the illuminance of a user's face, and in case it falls outside of a predefined range (putting the user at risk of future sight deterioration and progression of myopia), the device stores the illuminance data and/or sends a control signal to circuitry operative to notify the user. If processing circuitry determines that the illuminance is equal or greater than the predefined illuminance, the circuitry operative can stop the notification. The notification can be modulated by any combination of the illuminance and the time of use.

Provided is a telescope star searching method and device based on image recognition and telescope. The method includes: using a telescope to photograph a starry sky image; identifying a star in the starry sky image and matching a right ascension and a declination of the identified star according to a star database; obtaining a first altitude/azimuth angle according to photographing time of the starry sky image, a location of an imaging apparatus at the photographing time, and the right ascension and the declination of the identified star; matching a right ascension and a declination of a target star in the star database; obtaining a second altitude/azimuth angle according to current time, a current location of the imaging apparatus, and the right ascension and the declination of the target star; and adjusting the telescope from the first altitude/azimuth angle to the second altitude/azimuth.

The present disclosure describes systems, methods, and devices for estimating spectral contributions in ambient light. The present disclosure also describes systems, methods, and devices for compensating for field of view errors resulting from the user, contextual structures (e.g., buildings, trees, fixtures, or geological formations), atmospheric effects (e.g., ozone coverage, smog, fog, haze, or clouds), device structures, and/or device orientation/tilt relative to a light source being measured (e.g., sun, indoor/outdoor light emitter, or an at least partially reflective surface). The present disclosure also describes systems, methods, and devices for estimating spectral contributions in light or color measurements and accounting for field of view errors to obtain a refined estimate.

An embodiment of present application discloses a light sensing module for use with a reflector. The light sensing module includes a housing, an optical transceiver, and a shading hood. The housing includes a through hole. The optical transceiver includes a light source, a light sensor, and a separating wall. The light source is disposed in the housing for emitting a first light. The first light can pass through the housing via the through hole, and be reflected as a second light by the reflector. The light sensor is disposed in the housing for receiving the second light. The separating wall is disposed between the light source and the light sensor. The shading hood is located at a position corresponding to the light sensor, and has an opening positioned in an optical path of the second light.

Devices, systems, and methods are provided for enhanced multispectral sensor calibration. A device may include a first layer having copper, a second layer having solder material, the second layer above the first layer, and a third layer having a white silkscreen material, the third layer above the second layer. Regarding the device, the first layer may be used for calibration of a thermal sensor, the second layer may be used for calibration of an image sensor and calibration of a light detection and ranging (LIDAR) sensor, and the third layer may be used for the calibration of the image sensor and the calibration of the LIDAR sensor.