An electronic device includes a housing including a first surface, a display exposed through a first portion of the first surface, a first light emitting source exposed through a second portion of the first surface, an imaging sensor circuit that is exposed through a third portion of the first surface and is electrically connected with the first light emitting source, and a processor that is disposed in the housing and is electrically connected with the imaging sensor circuit. In addition, various embodiments recognized through the specification are possible.

An optical sensor package includes a substrate, a wall disposed upon the substrate, and a cover layer disposed on the wall. The substrate, the wall, and the cover layer at least partially define a cavity. The optical sensor package also includes a sensor disposed upon the substrate within the cavity. A cloaking layer is disposed upon to the cover layer. The cloaking layer is transmissive to at least a portion of a light spectrum and is configured to at least partially conceal the sensor. In some examples, the optical sensor package also includes a light source disposed upon the substrate within another cavity at least partially defined by the wall and the cover layer.

A photosensitive transistor or voltage-mode device which comprises a gate electrode, a layer of ambipolar two-dimensional material such as graphene and a layer of photoactive semiconducting material forms a junction with the ambipolar two-dimensional material. The photoactive semiconducting material and the ambipolar two-dimensional material are configured so that there is a non-screening gate voltage interval where an interface voltage at the junction between the photoactive semiconducting layer and the ambipolar two-dimensional material can be changed by applying to the gate electrode a gate voltage which falls within the non-screening gate voltage interval. The non-screening gate voltage interval comprises a flat-band gate voltage at which the interface voltage is zero. An electrical shutter can be operated at this gate voltage.

An eye-tracking system comprises one or more optical sources configured to emit infrared light with a narrow spectral linewidth toward an eye of a user and one or more shuttered optical sensors configured to receive infrared light reflected off the eye of the user. A controller is configured to pulse the one or more optical sources on and off, such that a pulse-on duration is less than a duration needed to fully thermalize each optical source. The controller is also configured to open the shuttered optical sensor for a detection duration based on the pulse-on duration. A conformation of the user's eye may be indicated based on infrared light received at the shuttered optical sensor during the detection duration.

Techniques are provided to perform flat field correction for infrared cameras using a liquid shutter. Devices and methods provide a focal plane array (FPA) that receives infrared radiation (e.g., thermal infrared radiation) from a scene, and infrared-opaque liquid disposed in a cavity of a liquid shutter housing, and a fluid controller that directs the liquid from a reservoir area of the cavity to a field of view area of the cavity to block the FPA from the infrared radiation. Flat field correction terms may be determined and radiometric calibration may be performed. In one example, a liquid shutter uses voltages to direct liquid. In another example, a liquid shutter uses magnetic fields from electromagnets to direct liquid such as ferrofluid. In another example, a liquid shutter uses electrowetting techniques to direct liquid such as water. In a further example, a liquid shutter uses a pump.

The use of a blade driving device including a first plate wherein a first opening portion is formed; a blade formed so as to enable opening/closing of the first opening portion; a driving mechanism driving the blade; and a cover, wherein a second opening portion is formed so as to essentially overlap the first opening portion, and formed so as to cover the base plate and the driving mechanism portion. Because the base plate and driving mechanism portion are covered by the cover, when compared to the conventional structure, this enables the transmission, without variability, of heat in relation to the driving mechanism portion and the base plate.

A method and a device for measuring absorbed energy-momentum symmetry in which radiant energy W.Math.sr.sup.1.Math.m.sup.2.Math.nm.sup.1 is compared directly against its absorbed impinging momentum kg.Math.m.Math.s1 in a manner that will provide an experimental basis for asymmetrical anomalies that may or may not exist within a measurable range of the electromagnetic spectrum.

A photometer includes a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part. A light receiver is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result.

Polaritonic hot electron infrared photodetector that detect infrared radiation. In one implementation, the polaritonic hot electron infrared photodetector includes a first contact layer, a second contact layer, a first dielectric layer, a second dielectric layer, and a conductor layer. The first dielectric layer is coupled between the first contact layer and the second contact layer. The second dielectric layer is coupled between the first dielectric layer and the second contact layer. The conductor layer is coupled between the first dielectric layer and the second dielectric layer. Infrared radiation incident upon the conductor layer is operable to create hot carriers that are injected from a conduction band of the conductor layer to a conduction band of the second contact layer.

Reduces an increase in temperature of the blade member. Comprises: a blade supporting member, disposed forward of a photodetecting sensor that acts as a thermal source, having an opening 1a through which passes light that is to be incident into the photodetecting sensor; a blade member, supported movably on the blade supporting member, for opening and closing the opening; an actuator for driving the blade member open and closed, wherein: wherein the blade supporting member comprises a containing portion 1b, for containing the blade member and the actuator on a front or rear surface that is perpendicular to the optical axis of the opening, and an exposed portion that is arranged in parallel to the containing portion.