A flame detection system includes: an optical sensor that detects light generated from a light source; an applied voltage generating circuit that periodically applies a drive pulse voltage to the optical sensor, discharge determining portion that detects a discharge from the optical sensor, a discharge probability calculating portion that calculates a discharge probability based on a number of times of application of the drive pulse voltage and a number of times of discharge detected in the a first state in which the optical sensor is shielded from light and a second state in which the optical sensor can receive light, a sensitivity parameter storing portion storing known sensitivity parameters of the optical sensor; and a received light quantity calculating portion that calculates the received light quantity by the optical sensor in the second state based on the sensitivity parameters and the discharge probabilities calculated in the first and second states.

A mannikin-based optical analyzer for analyzing an exposure of a subject to an environmental lighting condition. The analyzer has a mannikin with an outer surface replicating a facial profile of the subject, an interior inside the outer surface, and at least one pupil for admission of light into the interior of the mannikin. The analyzer has at least one optical detector configured to acquire and wavelength analyze light directed through the at least one pupil.

A flicker measurement device includes a first processing unit that performs a first process of calculating respective flicker values of a plurality of measurement regions set on a measurement object based on a photometric quantity of the measurement object obtained from the measurement object under a measurement condition of a flicker for each of the plurality of measurement conditions stored in advance in a measurement condition storage unit, a second processing unit that performs a second process of generating linked data in which data composed of the respective flicker values of the plurality of measurement regions calculated by the first processing unit and the measurement conditions are linked for each of the plurality of measurement conditions, and a third processing unit that performs a third process of storing the linked data generated by the second processing unit in a linked data storage unit for each of the plurality of measurement conditions.

A device for measuring two-dimensional flicker of the present application includes a plurality of two-dimensional sensors having a partial readout function of reading out only a pixel value of some of photoelectric conversion elements included in set partial readout regions, among a plurality of photoelectric conversion elements. In the device for measuring two-dimensional flicker, a plurality of measurement regions are set two-dimensionally on a measurement target object. Each pixel in the plurality of measurement regions is individually acquired, by setting each of the plurality of partial readout regions of the plurality of two-dimensional sensors in each of a plurality of partial imaging regions obtained by dividing an entire imaging region including entirely the measurement target object. A flicker value of the plurality of measurement regions is individually obtained based on each pixel value in the plurality of measurement regions.

An optical detection system includes a first device that has a first light source and a first light detector, and a second device that has a second light source and a second light detector. The first and second devices are configured to turn on and off the first and second light sources periodically based on first and second control signals, respectively. The first and second light sources are configured not to emit light simultaneously. The first and second light sources emit light in wavelength ranges that overlap. The optical detection system further has the characteristic that when the first light source is turned on, a radiant power delivered to the second light detector from the first light source is at least 25 percent of a radiant power delivered to the first light detector from the first light source.

Radiation sensor including a detection assembly and a chopper assembly, which are mechanically coupled to delimit a main cavity; and wherein the chopper assembly includes: a suspended movable structure, which extends in the main cavity; and an actuation structure, which is electrically controllable to cause a change of position of the suspended movable structure. The detection unit includes a detection structure, which faces the main cavity and includes a number of detection devices. The suspended movable structure includes a first shield of conductive material, which shields the detection devices from the radiation, the shielding of the detection devices being a function of the position of the suspended movable structure.

Radiation sensor including a detection assembly and a chopper assembly, which are mechanically coupled to delimit a main cavity; and wherein the chopper assembly includes: a suspended movable structure, which extends in the main cavity; and an actuation structure, which is electrically controllable to cause a change of position of the suspended movable structure. The detection unit includes a detection structure, which faces the main cavity and includes a number of detection devices. The suspended movable structure includes a first shield of conductive material, which shields the detection devices from the radiation, the shielding of the detection devices being a function of the position of the suspended movable structure.

Apparatuses and methods for flicker detection are described. Some aspects are directed to an optoelectronic device comprising a flicker sensor and a processor. The flicker sensor includes a plurality of photodetectors and readout circuitry. The flicker sensor is configured such that each photodetector of the plurality of photodetectors has a different field of view of a plurality of fields of view. The readout circuitry outputs a digital signal corresponding to a field of view of the plurality of fields of view. The processor of the optoelectronic device is configured to sample the plurality of photodetectors using the readout circuitry, and detect flicker in the one or more of the plurality of fields of view based at least in part on the sampling of the plurality of photodetectors.

Apparatuses and methods for flicker detection are described. Some aspects are directed to an optoelectronic device comprising a flicker sensor and a processor. The flicker sensor includes a plurality of photodetectors and readout circuitry. The flicker sensor is configured such that each photodetector of the plurality of photodetectors has a different field of view of a plurality of fields of view. The readout circuitry outputs a digital signal corresponding to a field of view of the plurality of fields of view. The processor of the optoelectronic device is configured to sample the plurality of photodetectors using the readout circuitry, and detect flicker in the one or more of the plurality of fields of view based at least in part on the sampling of the plurality of photodetectors.