摘要:
A moisture sensor for detecting moisture content of an object includes a light source to emit light having an infrared wavelength that is absorbed by water; an optical system to receive the light from the light source and output linearly polarized light having a first polarization direction in a direction toward the object, and to receive light scattered from the object and output linearly polarized light having a second polarization direction perpendicular to the first polarization direction in another direction other than the direction toward the object; and a photodetector to receive the linearly polarized light having the second polarization direction output from the optical system.
摘要:
An optical sensor includes a light source; and an optical detector detecting intensity of light that is reflected by a recording medium, the light from the light source and irradiated onto the recording medium. Further, when an incident angle of the light incident to the recording medium from the light source relative to a normal line of the recording medium is given as θ1, a formula 75°≦θ1≦85° is satisfied.
摘要:
An optical sensor is disclosed. The optical sensor includes an irradiating system which irradiates a linearly polarized light; a first photodetecting system including a first photodetector which is arranged on an optical path of a light which is specularly reflected from a subject; a second photodetecting system including an optical element which is arranged on an optical path of a light which is diffuse reflected from the subject within an incident face in the subject and which separates a linearly polarized component in a second polarizing direction which is orthogonal to a first polarizing direction and a second photodetector which receives a light separated by the optical element, wherein an angle of taking in the light in the first photodetector and an angle of taking in the light in the second photodetector are mutually different.
摘要:
An optical sensor includes a first illuminating system, a second illuminating system, a first regular reflected light detection system, a second regular reflected light detection system and so forth. The first illuminating system is disposed at the −X side of the opening in the dark box, and the second illuminating system is disposed at the +X side of the opening in the dark box. The first and second illuminating systems emit light to the opening. The incidence angles of irradiation light from the first and second illuminating systems relative to the surface of the stage are set equal to each other. The first regular reflected light detection system detects the light emitted from the first illuminating system and regularly reflected by the recording paper, and the second regular reflected light detection system detects the light emitted from the second illuminating system and regularly reflected by the recording paper.
摘要:
An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
摘要:
An optical sensor including an irradiation system including an irradiation system including a light source unit having a light source, the irradiation system configured to emit a linearly polarized light of a first polarization direction onto a surface of an object, a polarizing optical element disposed on an optical path of the light that is emitted from the irradiation system and reflected by diffuse reflection from an incident plane of the object and configured to separate a linearly polarized light component of a second polarization direction, a first photodetector configured to receive the linearly polarized light component of the second polarization direction separated by the polarizing optical element, and a housing supporting the irradiation system, the polarizing optical element, and the first photodetector, where the light source unit is fixed to the housing in a light emitting direction of the light source unit via space.
摘要:
An optical sensor including an abutment part configured to abut one edge of an object to be measured, a wall extending along a side of the object to be measured and having a first opening to pass light emitted to the object to be measured, and a first concave portion formed between the first opening and the abutment part on a side of the wall to position the object to be measured. A paper-type discrimination device including the optical sensor, and a controller configured to discriminate a paper type of the object using the reflection light from the object measured by the optical sensor. An image forming apparatus including the optical sensor or the paper-type discrimination device.
摘要:
A media-independent handover key management architecture is disclosed that uses Kerberos for secure key distribution among a server, an authenticator, and a mobile node. In the preferred embodiments, signaling for key distribution is based on re-keying and is decoupled from re-authentication that requires EAP (Extensible Authentication Protocol) and AAA (Authentication, Authorization and Accounting) signaling similar to initial network access authentication. In this framework, the mobile node is able to obtain master session keys required for dynamically establishing the security associations with a set of authenticators without communicating with them before handover. By separating re-key operation from re-authentication, the proposed architecture is more optimized for a proactive mode of operation. It can also be optimized for reactive mode of operation by reversing the key distribution roles between the mobile node and the target access node.
摘要:
A biological information measuring technique with improved reliability is proposed. A method of measuring biological information using an optical element with a totally reflecting surface, which is to be brought into contact with an object to be observed, is provided. The method includes, after the optical element has been in contact with the object to be observed, acquiring an absorbance at the totally reflecting surface in a state where the optical element is not in contact with the object to be observed, and determining by an information processing apparatus whether the object to be observed needs to be cleaned, based on the absorbance.
摘要:
A measuring apparatus (100a, 1a) includes a light source (110) configured to emit probe light; a total reflection member (16) in contact with a to-be-measured object and configured to cause total reflection of the probe light that is incident; a light intensity detector (17) configured to detect light intensity of the probe light exiting from the total reflection member (16); an output unit (2) configured to output a measurement value obtained on the basis of the light intensity; a first support (31) supporting the light source (110) and the light intensity detector (17); and a second support (32) provided to the first support (31), detachable from the first support (31), and supporting the total reflection member (16).