A method of monitoring blockage of a sight tube attached to a wall of a process chamber, the sight tube being operatively associated with a TDLAS optical head with a window between the sight tube and the TDLAS optical head. The method includes the steps of providing a photo sensor in the TDLAS optical head, the photo sensor being positioned to receive light emitted by a light emitting process within the process chamber. An emission signal produced by light emitted by the light emitting process within the process chamber being received by the photo sensor is monitored. A determination is made if the emission signal is degrading.

A wiper system for a vehicle includes: a glass wiper disposed on a window glass of a vehicle; a motor providing driving power to the glass wiper; a camera capturing images of surroundings of the vehicle; and a camera wiper disposed on a camera lens of the camera and connected to the motor by a linkage to operate in association with the glass wiper such that the camera wiper swings back and forth over the camera lens while the glass wiper swings back and forth over the window glass.

Fouling of or damage to an electromagnetic radiation-transparent window can preclude one from obtaining satisfactory images with an image acquisition unit, such as a camera. Certain types of environments may be particularly prone toward promoting fouling or damage, and manual cleaning or repair of an electromagnetic radiation-transparent window may be difficult in some circumstances. These issues may be particularly prevalent when imaging drill cuttings and other solids obtained from a wellbore due to the complex sampling environment in which these solids are often disposed. Wellhead imaging systems can comprise: a flow pathway extending from a wellbore; an electromagnetic radiation-transparent window external to the wellbore establishing optical communication with the flow pathway; an image acquisition unit in optical communication with the flow pathway via the electromagnetic radiation-transparent window; and a movable barrier that is also electromagnetic radiation-transparent and is disposed between the electromagnetic radiation-transparent window and the flow pathway.

A measuring apparatus (10) is an apparatus that emits light through a transmissive member (20) and that detects reflected light from a target. The measuring apparatus (10) includes a light receiving element (18) and an attached-matter determination unit (121). The light receiving element (18) receives reflected light reflected by at least the transmissive member (20). The attached-matter determination unit (121) determines a type of attached matter adhering to the transmissive member (20). The attached-matter determination unit (121) determines whether or not the attached matter is moisture based on, for example, saturation time information indicating a length of time related to saturation of the light receiving element (18).

Aspects relate to automated cell culture incubators comprising imaging systems, e.g., holographic or phase-contrast imagers, configured for imaging said cells within the incubators.

The present invention relates to a probe unit comprising a probe (2) having a probe window (3) having a contact surface for facing a high pressure fluid flow, the probe unit comprising a probe housing (1) containing the probe including the probe window, the probe being moveable relative to the probe housing between a first position wherein the window is exposed to the fluid flow and a second position wherein the probe is enclosed by said housing and a space (11) is defined between said housing and said probe, said housing having an outer part into said fluid flow, said probe unit comprising sealing means (4, 5, 7) adapted to seal said defined space from said fluid flow when the probe is in said second position. The probe unit also comprises pressure adjustment means for reducing the pressure within said space and cleaning means (6, 9) for cleaning said probe when within said space.

A method for detecting a contamination of a cuvette of a turbidimeter. The turbidimeter includes a light source which emits a light beam directed to a cuvette, a scattering light detector, and a diffuser with a body and an actuator. The actuator moves the body between a parking position and a test position where the body is between the measurement light source and the cuvette, thereby interferes with the light beam, and generates a diffuse test light entering the cuvette. The method includes activating the actuator to move the body from the parking position into the test position, activating the light source, measuring a test light intensity received by the scattering light detector, comparing the test light intensity measured with a reference light intensity, and generating a contamination signal if a difference between a reference light intensity and the test light intensity measured exceeds a first threshold value.

A system includes a sensor base, a sensor cover having a window that is rotatably mounted to the base. The system includes a contacting cleaner and a contactless cleaner. The system further includes a processor that is programmed to actuate, first, the contactless cleaner and, then, upon determining that opacity of the window exceeds a predetermined threshold after actuation of the contactless cleaner, the contacting cleaner.

A dust sensor includes: a main body in which a dust inlet is formed and including an optical sensor and a lens for collecting light scattered by dust which enters into the main body through the dust inlet; a button unit protruding outwardly from the main body and having one end that is inserted into a coupling hole formed in the main body, wherein the button unit is selectively moved, by a pushing operation of a user, upward and downward with respect to an interior of the main body in which the lens is installed; and a cleaner installed on the one end of the button unit that is inserted into the main body, wherein the cleaner is repeatedly brought into contact with the lens by the upward and downward movement of the button unit.

In optical detection, a technology of efficiently removing dust, dirt and the like adhering to an optical system member is provided. Provided is a detecting device used for an optical detecting apparatus including a main body provided with a sample holding unit which holds a sample, and a light transmitting portion facing at least a part of the sample holding unit and located on an optical path in the optical detecting apparatus at the time of installation on the optical detecting apparatus, and a cleaning unit arranged at a position opposed to a member on the optical path in the optical detecting apparatus.