A device for probing an interior of a tube includes an annular frame configured for engagement with a rotor or an orbital element mount. The annular frame presents a mounting surface. An annular buffer layer is positioned radially inward of and concentrically with the annular frame. A flexible annular sealing layer is joined with the annular buffer layer and positioned radially inward of and concentrically with the annular buffer layer. The sealing layer is configured to form a seal with the tube. A rotational layer is positioned between the annular frame and the buffer layer enabling rotation of the annular frame about the annular buffer layer. A process cartridge frame is mounted on the mounting surface and includes three or more process cartridge openings. Each of the cartridge openings is configured to receive a process cartridge. Each process cartridge is rotatively selectable via rotation of the annular frame.

An optical analysis device for imaging a test sample with a camera including a housing base defining an interior volume, and a light chamber assembly disposed within the interior volume of the housing base. Optionally, the light chamber assembly includes a light tunnel defined by a continuous tube-shaped wall that extends from a first aperture to a second aperture: a light source is disposed both within the interior volume of the housing base and radially-outwardly of the tube-shaped wall of the light chamber. The camera is selectively positionable adjacent the first aperture of the light tunnel and the sample is selectively positionable within the interior volume of the housing base adjacent the second aperture of the light tunnel.

Disclosed is an optical gas sensor device that includes: a light source that emits infrared rays to a gas as a detection target; an optical filter that transmits the infrared rays; a light receiver that detects infrared rays incident via the optical filter and generates a detection signal; and a first substrate, the optical gas sensor device including a seal in which the optical filter is installed and which seals the light source or the light receiver. The seal is mounted on the first substrate.

An optical sensor includes a sensing element and an elastic sealing component. The sensing element includes a prism including a hypotenuse face and two leg faces and a sensing film on the hypotenuse face. The sensing film is exposed to a gastight space to include the target substance. A confining wall confining the gastight space has an opening and the opening is covered with the sensing element. The elastic sealing component is located between the sensing element and the opening. The sensing element is fixed by being pressed by the fixture. Light passes through one of the two leg faces and hit the sensing film. Light reflected off the sensing film goes out through the other one of the two leg faces. The photodetector detects light that is reflected off the sensing film and comes out through the other one of the two leg faces.

A well-logging tool may include a sonde housing, and a radiation generator carried by the sonde housing. The radiation generator may include a generator housing, a target carried by the generator housing, a charged particle source carried by the generator housing to direct charged particles at the target, and at least one voltage source coupled to the charged particle source. The at least one voltage source may include a voltage ladder comprising a plurality of voltage multiplication stages coupled in a bi-polar configuration, and at least one loading coil coupled at at least one intermediate position along the voltage ladder. The well-logging tool may further include at least one radiation detector carried by the sonde housing.

A SERS unit comprises a substrate; an optical function part formed on the substrate, for generating surface-enhanced Raman scattering; and a package containing the optical function part in an inert space and configured to irreversibly expose the space.

A fitting for positioning a probe in a hot gas path within a casing of a gas turbine engine is disclosed herein. The fitting includes a main body attachable to the casing opposite the hot gas path. The main body includes an internal bore and one or more cooling holes in communication with the internal bore. A compliant seal is positionable within the internal bore. In addition, a follower is positionable within the internal bore adjacent to the compliant seal. Moreover, the fitting includes a fastener configured to mate with the main body. In this manner, the follower deforms the compliant seal about the probe within the main body to secure and seal the probe within the main body.

Devices to detect a substance and methods of producing such a device are disclosed. An example device to detect a substance includes a housing defining an externally accessible chamber and a seal to enclose at least a portion of the chamber. The example device also includes a substrate includes nanoparticles positioned within the chamber. The nanoparticles to react to the substance when exposed thereto. The example device also includes a non-analytic solution within the chamber to protect the nanoparticles from premature exposure.

A device to measure the amount of light able to transmit through a liquid. The device uses a light detector and multiple light emitting diodes (LED's) along with an optical unit such that the light detector, LED's, and an optical unit define a path of light emitted by each individual LED or subgroup of LED's and detected by the detector. The device uses a structure designed to surround the LED's and light detector such that the structure allows the device to be immersed in the liquid and such that the structure is shaped to allow a volume of liquid to be between the LED's and detector, intersecting the light path.

Embodiments of the present disclosure include techniques for forming metasurfaces on optical materials. In one embodiment, light is generated by a light source and coupled through an optical material including a metasurface during an etching process to form the metasurface. Transmission through the optical material and metasurface is performed during the etching process to maximize the transmission of the metasurface. The present disclosure includes apparatuses and method for forming metasurfaces on optical materials.