Abstract: An electronic device housing may include a display cover layer that overlaps an array of pixels. The cover layer or other portion of the housing may have an opening that forms an optical and audio port. Optical and audio components may be coupled to the port. A port cover may cover some or all of the port. The port cover may include one or more layers of mesh or other materials that allow light and sound to pass while blocking environmental contaminants. The optical components may include an ambient light sensor or other devices that receive light and/or may include devices that emit light. The audio components may include a microphone and/or a speaker. The optical component may emit or receive light that passes through the audio component. A structure in the interior of the housing may form a passageway coupled to the port through which sound and light passes.

Abstract: An electronic device housing may include a display cover layer that overlaps an array of pixels. The cover layer or other portion of the housing may have an opening that forms an optical and audio port. Optical and audio components may be coupled to the port. A port cover may cover some or all of the port. The port cover may include one or more layers of mesh or other materials that allow light and sound to pass while blocking environmental contaminants. The optical components may include an ambient light sensor or other devices that receive light and/or may include devices that emit light. The audio components may include a microphone and/or a speaker. The optical component may emit or receive light that passes through the audio component. A structure in the interior of the housing may form a passageway coupled to the port through which sound and light passes.

Abstract: Techniques include receiving a design of an integrated computational element (ICE) including specification of a substrate and a plurality of layers, their respective target thicknesses and complex refractive indices, complex refractive indices of adjacent layers being different from each other, and a notional ICE fabricated in accordance with the ICE design being related to a characteristic of a sample; forming at least some of the layers of a plurality of ICEs in accordance with the ICE design using a deposition source, where the layers of the ICEs being formed are supported on a support that is periodically moved relative to the deposition source during the forming; monitoring characteristics of the layers of the ICEs during the forming, the monitoring of the characteristics being performed using a timing of the periodic motion of the support relative to the deposition source; and adjusting the forming based on results of the monitoring.

Abstract: Systems and methods are disclosed for improving optical spectrum fidelity of an integrated computational element fabricated on a substrate. The integrated computational element is configured, upon completion, to process an optical spectrum representing a chemical constituent of a production fluid from a wellbore. The systems and methods measure in situ a thickness, a complex index of refraction, or both of a film formed during fabrication to generate a predicted optical spectrum. The predicted optical spectrum is compared to a target optical spectrum. Revisions to a design of the integrated computational element are conducted in situ to improve optical spectrum fidelity relative to the target optical spectrum. Other systems and methods are presented.

Abstract: An electronic device housing may include a display cover layer that overlaps an array of pixels. The cover layer or other portion of the housing may have an opening that forms an optical and audio port. Optical and audio components may be coupled to the port. A port cover may cover some or all of the port. The port cover may include one or more layers of mesh or other materials that allow light and sound to pass while blocking environmental contaminants. The optical components may include an ambient light sensor or other devices that receive light and/or may include devices that emit light. The audio components may include a microphone and/or a speaker. The optical component may emit or receive light that passes through the audio component. A structure in the interior of the housing may form a passageway coupled to the port through which sound and light passes.

Abstract: A memristor element is used to create a spectrally programmable optical computing device for use in, for example, a downhole environment. An electromagnetic field is applied across the memristor element in order to alter its spectral properties. In turn, the spectral properties of sample-interacted light optically interacting with the memristor element are also altered. This alteration in spectral properties allows the memristor to be “programmed” to achieve a variety of transmission/reflection/absorption functions.

Abstract: A method of fabricating an optical computing device using a photonic crystal-based integrated computational element is provided. The method includes selecting a photonic crystal structure with a design suite stored in a non-transitory, computer-readable medium and obtaining a transmission spectrum for the selected photonic crystal. Further, the method includes determining a predictive power of a photonic crystal-based integrated computational element for a characteristic of a sample using the transmission spectrum and a spectral database. And adjusting the transmission spectrum to improve a predictive power of the photonic crystal-based integrated computational element for measuring a characteristic of a sample being analyzed. Also, fabricating the photonic crystal structure for the photonic crystal-based integrated computational element when the predictive power surpasses a pre-selected threshold.

Abstract: Fabry-Perot based optical computing devices and temperature sensors are disclosed for a number of applications including, for example, in-situ downhole fluid analysis and temperature detection.

Abstract: A method for designing an integrated computational element (ICE) includes generating an array of discrete data points and plotting the discrete data points across a predetermined wavelength region. A line shape is then generated that connects to and is constrained by the array of discrete data points, and thereby generates a first transmission function. The discrete data points are then iteratively modified based on one or more performance criteria to generate a second transmission function. A model transmission function corresponding to a model ICE design is then fitted to the second transmission function to identifying a predictive ICE design configured to detect a desired characteristic of interest.

Abstract: A memristor element is used to create a spectrally programmable optical device. An electromagnetic field is applied across the memristor element in order to alter its spectral properties. In turn, the spectral properties of the electromagnetic radiation optically interacting with the memristor element are also altered. This alteration in spectral properties allows the memristor to be “programmed” to achieve a variety of transmission/reflection/absorption functions.

Abstract: Optical computing devices may include capacitance-based nanomaterial detectors. For example, an optical computing device may include a light source that emits electromagnetic radiation into an optical train extending from the light source to a capacitance-based nanomaterial detector; a material positioned in the optical train to optically interact with the electromagnetic radiation and produce optically interacted light; and the capacitance-based nanomaterial detector comprising one or more nano-sized materials configured to have a resonantly-tuned absorption spectrum and being configured to receive the optically interacted light, apply a vector related to the characteristic of interest to the optically interacted light using the resonantly-tuned absorption spectrum, and generate an output signal indicative of the characteristic of interest.

Abstract: An example formation fluid analysis tool includes an optical element and a detector configured to receive light passed through the optical element. The optical element is configured to receive light from a fluid sample and comprises a substrate, an integrated computational element (ICE) fabricated on a first side of the substrate, and an optical filter fabricated on a second side of the substrate opposite the first side.

Abstract: An ambient light sensor system may be mounted in alignment with a window in a display cover layer associated with a display in an electronic device. The ambient light sensor system may have a light diffuser layer and an infrared-light-blocking filter. The light diffuser layer may have a polymer layer with embedded light-scattering desiccant particles. An ambient light sensor in the ambient light sensor system may receive ambient light through the light diffuser layer and the infrared-light-blocking filter. The infrared-light-blocking filter may have a polymer substrate and a thin-film interference filter formed from a stack of inorganic thin-film layers on the polymer substrate. Light-scattering desiccant particles may be incorporated into the polymer substrate of the infrared-light-blocking filter. Desiccant may also be incorporated into ambient light sensor support structures.

Abstract: Fabry-Perot based optical computing devices and temperature sensors are disclosed for a number of applications including, for example, in-situ downhole fluid analysis and temperature detection.

Abstract: Systems, tools, and methods are presented for processing a plurality of spectral ranges from an electromagnetic radiation that has been interacted with a fluid. Each spectral range within the plurality corresponds to a property of the fluid or a constituent therein. In one instance, a series of spectral analyzers, each including an integrated computational element coupled to an optical transducer, forms a monolithic structure to receive interacted electromagnetic radiation from the fluid. Each spectral analyzer is configured to process one of the plurality of spectral ranges. The series is ordered so spectral ranges are processed progressively from shortest wavelengths to longest wavelengths as interacted electromagnetic radiation propagates therethrough. Other systems, tools, and methods are presented.

Abstract: A method for designing an integrated computational element (ICE) includes generating an array of discrete data points and plotting the discrete data points across a predetermined wavelength region. A line shape is then generated that connects to and is constrained by the array of discrete data points, and thereby generates a first transmission function. The discrete data points are then iteratively modified based on one or more performance criteria to generate a second transmission function. A model transmission function corresponding to a model ICE design is then fitted to the second transmission function to identifying a predictive ICE design configured to detect a desired characteristic of interest.

Abstract: A system and method to design highly-sensitive Integrated Computational Elements for optical computing devices. A harmonic line shape is defined and used to simulate an optical response function which has a plurality of parameters that are varied until an ideal optical response function is determined. The ideal optical response function will be that function which maximizes the output sensitivity and/or minimizes the Standard Error of Calibration. Thereafter, the method designs a film stack having an optical response function that matches the ideal transmission function, and an ICE is fabricated based upon this design.

Abstract: Fabry-Perot based optical computing devices and temperature sensors are disclosed for a number of applications including, for example, in-situ downhole fluid analysis and temperature detection.

Abstract: Systems and methods of engineering the optical properties of an optical Integrated Computational Element device using ion implantation during fabrication are provided. A system as disclosed herein includes a chamber, a material source contained within the chamber, an ion source configured to provide a high-energy ion beam, a substrate holder to support a multilayer stack of materials that form the Integrated Computational Element device, a measurement system, and a computational unit. The material source provides a material layer to the multilayer stack, and at least a portion of the ion beam is deposited in the material layer according to an optical value provided by the measurement system.

Abstract: A memristor element is used to create a spectrally programmable optical device. An electromagnetic field is applied across the memristor element in order to alter its spectral properties. In turn, the spectral properties of the electromagnetic radiation optically interacting with the memristor element are also altered. This alteration in spectral properties allows the memristor to be “programmed” to achieve a variety of transmission/reflection/absorption functions.