A sight glass for observation of industrial applications using a non-glass lens.

A vehicle includes a body of the vehicle and a sensing system coupled to the body. The sensing system includes optical componentry and a glass material, where the glass material at least in part houses the optical componentry and the glass material is at least partially transparent to light at the wavelength of the optical componentry. Further the glass material has mechanical and performance properties that allow the sensing system to be positioned particularly low on the vehicle, at a position that may be of higher risk for damage from debris.

An optical system for immersion underwater in an aquaculture environment. The optical system captures, in situ, digital images of underwater objects such as freely swimming fish such as, for example, sea salmon or sea trout, as the fish swim naturally in the aquaculture environment. The digital images produced by the optical system are of enough quality such that reliable detection of sea lice in different life stages by a human visual inspection of the digital image or by computer vision systems is enabled.

An optical system for immersion underwater in an aquaculture environment. The optical system captures, in situ, digital images of underwater objects such as freely swimming fish such as, for example, sea salmon or sea trout, as the fish swim naturally in the aquaculture environment. The digital images produced by the optical system are of enough quality such that reliable detection of sea lice in different life stages by a human visual inspection of the digital image or by computer vision systems is enabled.

A thermal imaging system is provided. The thermal imaging system includes an explosion-proof housing with an optical window configured to contain an explosive pressure. The optical window allows electromagnetic thermal energy to pass. A thermal imaging sensor is disposed within the explosion-proof housing. Thermal imaging electronics are coupled to the thermal imaging sensor and configured to provide at least one thermal image based on a signal from the thermal imaging sensor. A lens assembly is disposed at least in front of the optical window external to the explosion-proof housing. A composite optical window for thermal imaging is also provided. In another embodiment, a thermal imaging system includes an explosion-proof housing having an optical window configured to contain an explosive pressure. An infrared (IR) camera is disposed within the explosion-proof housing. A reflector reflects electromagnetic thermal energy to the IR camera, but prevent an object from impacting the optical window.

A terminal display assembly and a mobile terminal are disclosed. The terminal display assembly may include a display screen, a light transmission and a seal ring. The display screen may define a through hole penetrating through the display screen in a thickness direction of the display screen. The light-transmission cover plate may be disposed on the display screen and cover the through hole. The seal ring may be disposed in the through hole. The seal ring may include a bottom and an outer wall. The bottom may be disposed on the light-transmission cover plate. The outer wall may be connected to the bottom, and at least a part of the outer wall may be disposed on the display screen.

A lens unit may include lenses and a holder in a tube shape which holds the lenses on an inner side such that in the lenses, a side face of a first lens located on a most object side may include a first side face part which is extended from an outer edge of a first face that is an object side face of the first lens toward an image side, a second side face part which is extended from an object side toward the image side on the image side with respect to the first side face part and an outer side in a radial direction with respect to the first side face part; and a third side face part which connects an image side end part of the first side face part with an object side end part of the second side face part.

A sanitary in-line sight glass assembly is provided having separate first and second hollow connection bodies and a transparent tube retainable between and within the connection bodies when the connection bodies are secured together in an end-to-end abutting relationship. Gaskets are located within the connection bodies at opposite ends of the transparent tube and a clamp is provided for securing the ends of the connection bodies together such that the gaskets are compressed and form seals. The connection bodies include sidewalls having at least one opening through which the transparent tube is exposed for providing a viewing window into a flow path defined by the assembly. The clamp may be a circumferentially-extending clamp having ends secured together with a winged fastener able to be gripped by the hand of an installer such that the assembly can be assembled and disassembled manually without the use of a tool.

A sight glass apparatus for viewing the interior of a pressurised vessel, chamber or a pipe conveying fluid under pressure is described. The sight glass apparatus comprises a sight glass assembly mounted over an opening into the vessel, chamber or pipe, the sight glass assembly comprising a sight glass adjacent the opening which provides a window to the inside of the vessel, chamber or pipe, and a containment vessel mounted behind and/or around the sight glass assembly for containing fluid exiting the opening in the pipe in the event that the sight glass assembly fails. In this way, even if the sight glass assembly fails, the pressurised fluid within the pressurised vessel, chamber or pipe is safely contained. In addition, a secondary sight glass can be provided behind the first, with a liquid or gel, or minimal gap, between the primary and secondary glasses to reduce the likelihood of a failure in the first sight glass triggering failure of the second sight glass, and/or a valve can be provided to automatically isolate the pressure system upon a sight glass failure.

A sight glass assembly can be configured to permit viewing into an interior of a pipe fitting and can comprise a housing defining an inner housing surface, an outer housing surface, a first housing end, and an opposed second housing end, the inner housing surface defining a housing bore extending through the housing from the first housing end to the second housing end; an adapter defining an inner adapter surface, an outer adapter surface, a first adapter end coupled to the housing, and an opposed second adapter end configured to be coupled to the pipe fitting, the inner adapter surface defining an adapter bore extending through the adapter from the first adapter end to the second adapter end; and a transparent viewport positioned in the housing bore such that the interior of the pipe fitting is viewable through the housing bore, the viewport, and the adapter bore.