Abstract:
A device for measuring the concentration of a biological constituent based on infrared radiation emitted by a subject's eardrum with the influence of the eardrum's thickness taken into account is provided. The biological constituent concentration measuring device includes: a detecting section for detecting infrared radiation emitted by an eardrum; an acquisition section for acquiring thickness information about the thickness of the eardrum; and a computing section for figuring out the concentration of the biological constituent based on the infrared radiation detected and the thickness information acquired. The infrared radiation emitted by the eardrum is subject to the influence of the subject's eardrum thickness. Therefore, by calculating the biological constituent concentration based on not only the infrared radiation detected but also the eardrum thickness information, the biological constituent concentration can be measured highly accurately.
Abstract:
Un détecteur optique sélectif pour détecter une lumière approximativement ponctuelle susceptible d'être collectée dans une plage de longueurs d'ondes et angle visuel prédéterminés est pourvu d'un élément collecteur optique fait en un matériau transparent à la lumière ayant des longueurs d'ondes dans une plage prédéterminée et d'un élément détecteur sensible à la lumière. L'invention se caractérise par le fait que le système collecteur optique possède une surface de point focal caractéristique de la plage prédéterminée de longueurs d'ondes et qui se situe à une certaine distance des surfaces de point focal caractéristiques des longueurs d'ondes en dehors de cette plage. L'élément détecteur est optiquement connecté au système collecteur optique par une ouverture formée dans la surface de point focal appartenant à la plage prédéterminée de longueurs d'ondes. La grandeur de l'ouverture correspond essentiellement à la grandeur de la surface du point focal de la lumière venant de l'angle visuel prédéterminé et appartenant à la plage prédéterminée de longueurs d'ondes.
Abstract:
The invention relates to an illumination device with a light emitting device (1) and a light sensor (3) for optical feedback by online monitoring the light output. The light emitting device (1) and the light sensor (3) are arranged adjacent to each other and are at least partially covered by an optical coupling device (7) for coupling a part of the emit- ted light from the light emitting device (1) to the light sensor (3). Further, an optical attenuator (11) is provided between the optical coupling device (7) and the light sensor (3). The optical attenuator (11) can be adapted such that a linear photosignal of the light sensor (3) over the complete driving current range of the light emitting device (1) is achieved. This is advantageous since calibration efforts are minimized.
Abstract:
A selective optical detector for detecting a substantially punctual light susceptible of being collected in a predetermined wavelength range and visual angle is provided with an optical collector element made of a light-transparent material having wavelengths comprised within a predetermined range and a light-sensitive detector element. The invention is characterized in that the optical collector system has a focus surface characteristic of the predetermined wavelength range and which is located at a certain distance from the focus surfaces which are characteristic of the wavelengths outside of said range. The detector element is optically connected to the optical collector system by an opening provided in the focus surface pertaining to the predetermined wavelength range. The size of the opening substantially corresponds to the size of the surface of the focus of the light coming from the predetermined visual angle and pertaining to the predetermined wavelength range.
Abstract:
A sunlight collecting device provided in the present invention includes a lens substrate, a plurality of Fresnel lens, a connector substrate, a plurality of optical fiber connectors, and a light-tracking substrate. The lens substrate has a plurality of circular openings. The Fresnel lenses correspond to the circular opening and are disposed on the lens substrate. The connector substrate is disposed parallel to the lens substrate and away from the lens substrate with a focal length. The optical fiber connectors are adjustably disposed on the connector substrate. The light-tracking substrate is disposed between the lens substrate and the connector substrate for simultaneously rotating the lens substrate and the connector substrate such that the Fresnel lenses are directly opposite to the sunlight. An LCD using the sunlight as a backlight source is further provided in the present invention.
Abstract:
A photoelectric converter includes a circuit board, a laser diode, a plurality of optical sensors mounted on the circuit board, a transmission body, and a first lens set, a second lens set, and a plurality of optical fibers mounted on the transmission body. The transmission body defines a reflection groove and a plurality of optical signal splitting holes. A first sidewall of the reflection groove is inclined relative to the transmission direction of the optical signals. A bottom surface of each optical signal splitting hole is inclined relative to the first sidewall and to the second surface. The optical signals transmitted by the first lens set are reflected by the first sidewall. Most of the reflected optical signals are transmitted to the optical fibers via the second lens set, and a small remaining portion of optical signals are reflected by the bottom surface to the optical sensors.