The air condition measurement apparatus according to various embodiments of the present invention comprises: a housing comprising a first space and a second space therein; a light-emitting unit which is positioned inside the housing, comprises a first lens, and radiates light to air flowing into the housing; a light-receiving unit which is positioned inside the housing, comprises a second lens, and receives reflected light formed from the reflection of the radiated light, radiated from the light-emitting unit, by foreign substances included in the air; a blocking member which transmits the radiated light or the reflected light and separates the first space, in which the light-emitting unit or the light-receiving unit is disposed, from the second space; and a control unit, wherein the control unit may be configured to measure the condition of air on the basis of a signal corresponding to the reflected light received by the light-receiving unit. Other various embodiments may be possible.

A system is presented for evaluating grain in a grain handling system. The system includes a sensor system and a sample conveyor system. In one or more arrangements, the sensor system is operatively connected to the grain handling system and includes an optical sensor. The sample conveyor system is configured to collect samples of grain in the grain handling system, deliver the samples of grain to the sensor system, and remove the samples of grain from the sensor system. The sensor system is configured to measure characteristics of the samples of grain delivered to the sensor system by the sample conveyor system. In one or more arrangements, the system includes a cleaning system configured to clean the optical sensor, the lens; and/or other components of the sensor system. In one or more arrangements, the system includes a recalibration system configured to recalibrate the optical sensor.

A device and method for protecting an optical sensor of a vehicle are disclosed, wherein the sensor is protected from environmental pollutants which may adhere to an optical surface of the sensor if the sensor is exposed to them, and wherein the environmental pollutants are kept away from the sensor by an ultrasonic cleaning of the sensor surface using an ultrasonic field. The ultrasonic field of the ultrasonic cleaning is emitted by a protection device into the air to provide a protection zone around the optical surface of the sensor such that a contact of the optical surface with the environmental pollutants is avoided, wherein the environmental pollutants are moved and/or destroyed in the air away from the sensor if they enter the protection zone), and wherein the protection zone provides a contactless cleaning of the sensor.

A device and method for protecting an optical sensor of a vehicle are disclosed, wherein the sensor is protected from environmental pollutants which may adhere to an optical surface of the sensor if the sensor is exposed to them, and wherein the environmental pollutants are kept away from the sensor by an ultrasonic cleaning of the sensor surface using an ultrasonic field. The ultrasonic field of the ultrasonic cleaning is emitted by a protection device into the air to provide a protection zone around the optical surface of the sensor such that a contact of the optical surface with the environmental pollutants is avoided, wherein the environmental pollutants are moved and/or destroyed in the air away from the sensor if they enter the protection zone), and wherein the protection zone provides a contactless cleaning of the sensor.

There may be provided a system comprising a spectroscopic device; wherein the spectroscopic device is configured to analyze a fluid of a pool.

A sensor for monitoring CO.sub.2 in a fluid regardless of the phase properties of the fluid, i.e., regardless of whether the fluid contacting the window is a liquid water-based phase, a liquid oil-based phase, a mixture of liquid water and liquid oil-based phases, or a gas phase. The sensor includes an internal reflection window for contacting with the fluid. A mid-infrared light source directs a beam of mid-infrared radiation into the window and the beam is internal reflected at an interface between the window and the fluid. The reflected beam is passed through three narrow bandpass filters which preferentially transmit mid-infrared radiation over bands of wavelengths corresponding to absorbance peaks of water, oil and CO.sub.2. The amount of CO.sub.2 is determined from the intensities of the mid-infrared radiation passing through the three filters

An object of the invention is to provide an optical analysis method and an optical analysis system capable of accurately performing an optical analysis by using transmitted light even though a sample contains a turbid substance. The optical analysis method of the present disclosure is an optical analysis method for irradiating a sample s containing a turbid substance in a cell 11 with light and performing optical analysis on the sample s by using transmitted light of the light. The optical analysis method includes: exciting the sample s in the cell 11 by irradiation with ultrasonic waves while adjusting a frequency of the ultrasonic waves such that an intensity of the transmitted light is maximized, and then performing the optical analysis in a state where the sample s is irradiated with ultrasonic waves of this adjusted frequency.

A device and method for protecting an optical sensor of a vehicle are disclosed, wherein the sensor is protected from environmental pollutants which may adhere to an optical surface of the sensor if the sensor is exposed to them, and wherein the environmental pollutants are kept away from the sensor by an ultrasonic cleaning of the sensor surface using an ultrasonic field. The ultrasonic field of the ultrasonic cleaning is emitted by a protection device into the air to provide a protection zone around the optical surface of the sensor such that a contact of the optical surface with the environmental pollutants is avoided, wherein the environmental pollutants are moved and/or destroyed in the air away from the sensor if they enter the protection zone), and wherein the protection zone provides a contactless cleaning of the sensor.

A sensor for monitoring CO.sub.2 in a fluid regardless of the phase properties of the fluid, i.e., regardless of whether the fluid contacting the window is a liquid water-based phase, a liquid oil-based phase, a mixture of liquid water and liquid oil-based phases, or a gas phase. The sensor includes an internal reflection window for contacting with the fluid. A mid-infrared light source directs a beam of mid-infrared radiation into the window and the beam is internal reflected at an interface between the window and the fluid. The reflected beam is passed through three narrow bandpass filters which preferentially transmit mid-infrared radiation over bands of wavelengths corresponding to absorbance peaks of water, oil and CO.sub.2. The amount of CO.sub.2 is determined from the intensities of the mid-infrared radiation passing through the three filters.

An optical probe includes an elongate hollow probe body, an optical window mounted at a distal end of the probe body for transmitting light therethrough, an ultrasonic transducer mounted within the probe body for applying ultrasonic vibrations to the optical window for cleaning the optical window, and one or more light guides located within the probe body for transmitting light through the optical window to a measurement region and/or for receiving light transmitted through the optical window from the measurement region. The ultrasonic transducer is located within the distal end of the probe body adjacent the optical window to transmit ultrasonic vibrations directly from the ultrasonic transducer to the window.