Abstract:
A solid state image pickup device (31) in which a plurality of picture elements are arranged in two dimensions to pick up the image of the distribution in two-dimensional space of radiative ray, light beams, electrons, ions, etc., and which is characterized by an opening (34) piercing a substrate (33b) being provided at the roughly center of an image pickup part (33) where the picture elements are arranged, and a charge transfer path to connect charge transfer electrodes (33d) to read out the image of each picture element with one another being wired, avoiding the opening (34). Furthermore, the image pickup part (33) is divided into at least two regions with the boundary between them lying partially in the opening (34), and each region has an exclusive register for charge readout. Hereby, this image pickup device doubles as an image pickup device to pick up the two-dimensional distribution of radiative ray, etc. and an aperture to this radiation.
Abstract:
An optical system having a first order spectral range that is usable in an optical spectrum analyzer receives an broadband optical test signal and a optical calibration signal and couples the optical signals via two optically isolated paths to separate optical detectors. First and second pairs of optical fibers, with each pair having an input fiber and an output fiber, are positioned in a focal plane of a collimating optic that has an optical axis. The fiber pairs are symmetrically positioned on either side of the optical axis with the input fibers positioned on one side of the optical axis and the output fibers positioned on the opposite side of the optical axis. The input fibers receive the optical test signal and the optical calibration signal. The output optical fibers are coupled to first and second optical detectors. An optical calibration source generates second order or greater spectral lines that fall within the first order spectral range of the optical system. A diffraction grating receives the optical test signal and the optical calibration signal from the collimating optic and separates the first order spectral components of the broadband optical test signal and passes the second order or greater spectral lines of the optical calibration signal. The first optical detector that is responsive to the first order spectral components of the optical test signal receives the optical test signal from the collimating optic and converts the optical test signal to an electrical signal. A second optical detector that is responsive to the second order or greater spectral lines of the optical calibration signal concurrently receives the optical calibration signal from the collimating optic and converts the calibrations signal to an electrical signal.
Abstract:
The present invention pertains to a miniaturized optical component consisting of at least two elements (10, 30), of which at least one (10, 30) has optical microstructures (52, 53, 54). The components (10, 30) are separated by one ore more distance cast pieces (20). The components (10, 30) and the distance cast piece (20) have self-adjustable elements (40) for ensuring a precise relative adjustment when assembling such elements and the distance cast piece. The aim of the invention, which consists in facilitating assembly, can be reached as follows: the two elements are interconnected by means of attaching fittings to form one piece. Fibre tape or a foil-type hinge can be used as an attaching fitting (60-63). According to the inventive production process, the components and the distance cast piece are manufactured in one step together with their self-adjustable elements by a moulding technique, whereby two components are made at the same time to form one piece by means of an attaching fitting.
Abstract:
A high resolution fast imaging spectrograph is disclosed which provides 400 spatial channels and 100 spectral channels of information. A collimating mirror (10) and a focusing mirror (12) face a plane diffraction grating (14), which is positioned at an acute angle to the perpendicular to the optic axis. An elongated slot (16) is cut through approximately the center of the grating allowing the light source (18) to pass through the slot and onto the collimating mirror. A turning mirror (20), which is placed at the focus of the focusing mirror and adjacent to the slot, directs radiation to a camera mirror (22), which focuses a final image outside the instrument enclosure onto a detector (24). The light source to the instrument is provided by an optical fiber ribbon. The detector will commonly be a CCD or CID 2-D detector, permitting the simultaneous measurement of spectral distribution of a spatial profile. The instrument requires no power input, has no moving parts, and is completely passive with no operating controls or adjustments. Also disclosed is a commercially significant means to utilize the high spatial resolution imaging spectrograph in earth science remote imaging applications through the utilization of a reflecting telescope connected to the spectrograph by means of an optical fiber ribbon.
Abstract:
Une commande améliorée de balayage d'un miroir permettant d'entraîner un miroir mobile (14) dans un interféromètre avec une vitesse de balayage constante comprend une servo-commande à boucle fermée permettant d'obtenir un balayage du miroir à vitesse constante en réponse à une comparaison de phases d'un signal dérivé de la fréquence de battement d'un rayon laser à deux fréquences (16) traversant l'interféromètre et d'un signal de référence à une fréquence sélectionnée, la différence entre les fréquences ou la fréquence de battement du rayon laser à deux fréquences étant stabilisée à une valeur prédéterminée de différence entre les fréquences. La commande de balayage de miroir utilise une boucle de commande à verrouillage de phase qui verrouille la fréquence du signal de référence par rapport à la fréquence du signal dérivé du rayon laser, afin de permettre une commande précise de la vitesse du miroir.
Abstract:
In the spectroscopy module 1, a light absorbing layer 6 having a light-passing hole 6a through which light L1 advancing into a spectroscopic portion 3 passes and a light-passing hole 6b through which light L2 advancing into a light detecting portion 4a of a light detecting element 4 passes is integrally formed by patterning. Therefore, it is possible to prevent deviation of the relative positional relationship between the light-passing hole 6a and the light-passing hole 6b. Further, since the occurrence of stray light is suppressed by the light absorbing layer 6 and the stray light is absorbed, the light detecting portion 4a of the light detecting element 4 can be suppressed from being made incident. Therefore, according to the spectroscopy module 1, it is possible to improve the reliability.
Abstract:
In the spectroscopy module 1, a light detecting element 4 is provided with a light passing opening 4b through which light made incident into a body portion 2 passes. Therefore, it is possible to prevent deviation of the relative positional relationship between the light passing opening 4b and a light detection portion 4a of the light detecting element 4. Further, an optical element 7, which guides light made incident into the body portion 2, is arranged at the light passing opening 4b. Therefore, light, which is to be made incident into the body portion 2, is not partially blocked at a light incident edge portion of the light passing opening 4b, but light, which is to be made incident into the body portion 2, can be guided securely. Therefore, according to the spectroscopy module 1, it is possible to improve the reliability.