Abstract:
An optical sensor for measuring fluid properties is provided. The optical sensor includes a channel configured to have a fluid flow therethrough; a light source provided on a first side of the channel; a first light detector provided on the first side of the channel; and a second light detector provided on a second side of the channel.
Abstract:
A sheet discriminator, which can be included in an image forming apparatus, includes an optical information detector, a sheet distinguisher, and a sheet thickness detector. The optical information detector includes a light emitter to emit light to a recording medium and a light receiver to receive the light and detects information of the recording medium. The sheet distinguisher distinguishes a type of the recording medium based on the information detected by the optical information detector. The sheet thickness detector includes a displacement gauge to sandwich the recording medium with an opposing member disposed facing the displacement gauge and to move from an initial position thereof and a displacement detector to detect an amount of displacement of the displacement gauge. The sheet thickness detector detects a thickness of the recording medium based on detection results obtained by the displacement detector.
Abstract:
The present invention is a method of evaluating optical characteristics of a transparent substrate that is disposed on a display device, wherein the optical characteristics of the transparent substrate are evaluated by selecting two values among a quantified resolution index value (T), a quantified reflection image diffusiveness index value (R), and a quantified sparkle index value of the transparent substrate. According to the present invention, a transparent substrate and an anti-glare process that is to be applied to it can be properly selected, depending on purpose and use. The present invention can be utilized, for example, for evaluating optical characteristics of a transparent substrate that is installed in various types of display devices, such as an LCD device, an OLED device, a PDP device, and a tablet type display device.
Abstract:
Systems, methods, and apparatuses are disclosed for sensing clear or transparent media in printers. In one embodiment, a media conveyance apparatus is provided comprising a light sensor positioned on a first side of a media conveyance path; a light source positioned on a second side of the media conveyance path; and presence determination circuitry. The media conveyance apparatus is configured such that the light sensor and the light source are positioned such that media may pass between the light sensor and the light source along the media conveyance path. The media conveyance apparatus is further configured such that the light sensor provides signals to the presence determination circuitry indicating an amount of light received from the light source and the presence determination circuitry determines a reflection loss based on the signals received from the light sensor and further determines whether the reflection loss satisfies a loss threshold. The media conveyance apparatus is further configured so that if the presence determination circuitry determines the reflection loss satisfies the loss threshold, the presence determination circuitry outputs a media present indication.
Abstract:
A measurement system (5) comprises a radiation source (10) and a detection system (15), wherein the radiation source is arranged such that radiation from the radiation source is incident on a sample (25) and the detection system is configured to receive at least part of the radiation via the sample, wherein the system is reconfigurable so as to vary a path length that the radiation travels through the sample and/or a reflectance of at least one surface upon which the radiation is incident after passing through at least part of the sample. A property of the sample may be determined based on at least the first and second measurements.
Abstract:
The invention relates to a spectrophotometer for the automated optical characterization of solar collector tubes and to a method for the operation thereof, that measures the coefficient of transmission of the glass tube and of reflection of the metal tube. The device includes all the necessary components for taking said measurement, such as the optical bench supporting the tube, the standard or framework, and the optical modules for the device, a main module that generates the light bundles, a measuring module that measures the coefficient of transmission of the outer glass tube and the coefficient of reflection of the inner metal tube, a mechanical system of tube rotation, an electronic system of data acquisition and processing, an external computer for controlling the device and processing the data measured, and a system of communication between the device and the computer.
Abstract:
A sensor chip for detecting an immune response against an influenza virus, the sensor chip including a substrate having a surface and a plurality of hemagglutinin polypeptides bound to discrete locations on the surface of the substrate, each hemagglutinin polypeptide having a hemagglutinin epitope. Detection devices containing the sensor chip and methods of detecting influenza immune responses are also described herein.
Abstract:
A measurement system for measuring a degree of moisture stratification in a flat sheet product, such as paper, board or other materials. The system uses a combination of a reflection gauge and a transmission gauge to provide output signals indicative of surface moisture of a first side and of moisture in the body of the flat sheet product. The output signals are processed by a controller or computer to provide a measurement of the moisture stratification. An additional reflection gauge and an additional transmission gauge can also be used to provide additional output signals indicative of surface moisture of a second side of the flat sheet product and of moisture in the body. Narrow band radiation is used with modulation to distinguish from ambient radiation as well as radiation incident on the opposite side.
Abstract:
Disclosed is a method for calibrating an optical component, such as a DWDM, a thin film filter, a collimator, and a wave-guide. The method includes the steps of projecting a laser beam through the optical component, detecting the transmitting power while moving the optical component until the transmitting power is maximum to determine a local area, and detecting the reflected power while moving the optical component with fine steps within the local area until the reflected power is minimum, where an optimum point is located, which gives the maximum transmitting power and minimum reflected power.
Abstract:
The present invention provides a method and system to correct for angular spread within an HDR used to determine IR optical constants. An algorithm simulates the transmission and polarized reflection actually observed. This is achieved by averaging power scattering over an angular spread corresponding to the size of the HDR mirror. Such an algorithm may incorporate corrections for angular spread that may be used to determine the thickness of a film (coating) as well as the optical constants of the film or coating on low loss ranges.