Embodiments of the present disclosure relate to optical devices for augmented, virtual, and/or mixed reality applications. In one or more embodiments, an optical device metrology system is configured to measure a plurality of see-through metrics for optical devices.

Embodiments of the present disclosure relate to optical devices for augmented, virtual, and/or mixed reality applications. In one or more embodiments, an optical device metrology system is configured to measure a plurality of first metrics and one or more second metrics for optical devices, the one or more second metrics including a display leakage metric.

Described herein is a method of evaluating artificial lighting of a surface. The method may comprise measuring a first lumen output at a first location on the surface at a first altitude. The method may further comprise photographing the surface from a second altitude to obtain an aerial photograph of the surface comprising a plurality of pixels, each pixel of the plurality of pixels having a second lumen output, and performing an altitude adjustment on the second lumen output to obtain a third lumen output. The method may comprise dividing the aerial photograph into a plurality of zones, each zone corresponding to a section of the surface. The method may further comprise establishing a user-defined threshold lumen output for each zone of the plurality of zones, and identifying a percentage of the total number of pixels in each zone which meets or exceeds the user-defined threshold lumen output.

A method for light-to-frequency conversion comprises the steps of illuminating a photodiode by a light source, generating a photocurrent by means of the photodiode, converting the photocurrent into a digital comparator output signal depending on a first clock signal, generating a first count comprising an integer number of counts, where the generation of the first count depends on the first clock signal, generating a second count which relates to the time interval between at least two counts of the first count, and determining the frequency of a repeating pattern in the intensity of electromagnetic radiation emitted by the light source and detected by the photodiode from the first count and the second count. Furthermore, a light-to-frequency converter arrangement is provided.

A display device includes: a substrate; a display element layer disposed on the substrate, where the display element layer includes a light emitting element which emits light; a polarizing film disposed on the display element layer, where the polarizing film includes a first polarizer having a first absorption axis extending to a first direction and a first transmission axis extending to a second direction orthogonal to the first direction; and a first layer disposed on one surface of the polarizing film, where the first layer has a first phase difference. Light emitted from the display element layer has a polarizing axis, and an angle between the polarizing axis and one of the first absorption axis and the first transmission axis is in a range of about 25 degrees to about 65 degrees.

The present disclosure relates to a method for photometrical charting of a light source (Q, 3) clamped within a positioning device (1) and stationary relative to an object coordinate system (T) by means of a luminance density measurement camera (4) arranged stationary relative to a world coordinate system (W), wherein the light source (Q, 3) is moved between a first actual measurement position (P1′) and at least one further actual measurement position (P2′ to P5′) along a kinematic chain of the positioning device (1) within the world coordinate system (W), wherein a luminance density measurement image (81 to 85) describing the spatial distribution of a photometric characteristic within a measurement surface is recorded by means of the luminance density measurement camera (4) in each actual measurement position (P1′ to P5′) with the light source (Q, 3) turned on, and wherein the position and/or orientation of the object coordinate system (T) relative to the world coordinate system (W) is recorded in each actual measurement position (P1′ to P5′) in direct reference to the world coordinate system (W) without reference to the kinematic chain of the positioning device (1). Moreover, the present disclosure relates to the use of such a method for photometric charting of a headlight (3).

An inspection device including a switch, a photo sensing element and a control module, where the switch is coupled between an alternating current power source and an emergency lighting device and is switched by the control module; the photo sensing element is used for sensing a lighting state of the emergency lighting device; and the control module is used to receive a command from a handheld device and transmit a detection result to the handheld device via a wireless communication.

A device including a plurality of epitaxial chips is disclosed. An epitaxial chip can have one or more of a light source and a detector, where the detector can be configured to measure the optical properties of the light emitted by a light source. In some examples, one or more epitaxial chips can have one or more optical properties that differ from other epitaxial chips. The epitaxial chips can be dependently operable. For example, the detector located on one epitaxial chip can be configured for measuring the optical properties of light emitted by a light source located on another epitaxial chip by way of one or more optical signals. The collection of epitaxial chips can also allow detection of a plurality of laser outputs, where two or more epitaxial chips can have different material and/or optical properties.

The invention provides a light indicator (100) for use in evaluating melanopsin active radiation in a flux of light, the light indicator (100) comprising a first light indicator element (110) comprising a first light reflective element (112) and a second light indicator element (120) comprising a second light reflective element (122), the light reflecting elements (112, 122) having different wavelength dependencies of the spectral reflectivity, wherein the light reflecting elements (112, 122) are selected to provide the same intensity of reflected light of two or more different types of light irradiating on the light indicator elements (110, 120), wherein the two or more different types of light have different spectral power distributions in the visible wavelength range but having the same ratios of the melanopic flux and the luminous flux, wherein the ratio of the melanopic flux and the luminous flux of light is defined as Formula (I) wherein SPD(λ) is the spectral power distribution of the light, m(λ) is the melanopic sensitivity function, and the Y(λ) is the photopic sensitivity.

The present disclosure includes an electronic device and a method thereof. The electronic device includes a display, an ambient light sensor, and at least one processor, operatively connected to the display and the ambient light sensor. The at least one processor is configured to detect, by using the ambient light sensor, ambient light of the electronic device during a first duration in a state in which the display is turned off, identify a setting for being used for the ambient light sensor, based at least in part on a characteristic of the ambient light, detect, by using the ambient light sensor, ambient light of the electronic device during a second duration based at least in part on the identified setting, and control a function of the display, based at least in part on the characteristic of the ambient light detected during the second duration.