摘要:
An interventional instrument, system and method include an elongated flexible member (100) having one or more segmented sections (101) disposed longitudinally. An optical fiber (104) is disposed internally in the flexible member. A plurality of optical sensors (102) are coupled to the optical fiber and distributed along a length of the flexible member such that the optical sensors are positioned to monitor parameters simultaneously at different positions or at different data sources along the flexible member to provide distributed sensing.
摘要:
An apparatus, system and method for determining a position includes a transducer device (102) configured to receive signals from a console (104) and generate images based upon reflected waves. A flexible cable (108) is coupled to the transducer device to provide excitation energy to the transducer device from the console. An optical fiber (110) has a shape and position corresponding to a shape and position of the cable during operation. A plurality of sensors (122) is in optical communication with the optical fiber. The sensors are configured to measure deflections and bending in the optical fiber such that the deflections and bending in the optical fiber are employed to determine positional information about the transducer device.
摘要:
An apparatus, system and method determining a position of an instrument (100) are provided. A sheath (104) is configured to fit within an instrument channel of a medical scope. An optical fiber (112) is disposed within the sheath and a plurality of sensors (106) is integrated in optical fiber. The sensors are configured to measure deflections and bending in the optical fiber. A fixing mechanism (140) is sized to fit within the instrument channel in a first state and fixes the sheath within the instrument channel in a second state such that the fixing mechanism anchors the sheath and the optical fiber so that the deflections and bending in the optical fiber are employed to determine a position of the instrument.
摘要:
An apparatus, system and method for determining a position includes a transducer device (102) configured to receive signals from a console (104) and generate images based upon reflected waves. A flexible cable (108) is coupled to the transducer device to provide excitation energy to the transducer device from the console. An optical fiber (110) has a shape and position corresponding to a shape and position of the cable during operation. A plurality of sensors (122) is in optical communication with the optical fiber. The sensors are configured to measure deflections and bending in the optical fiber such that the deflections and bending in the optical fiber are employed to determine positional information about the transducer device.
摘要:
An optical examination device (10) adapted to be at least partially inserted into a turbid medium is provided. The optical examination device comprises a shaft portion (21) adapted to be inserted into the turbid medium, the shaft portion (21) comprising a tip portion (22) adapted to be the foremost portion during insertion into the turbid medium. At least one light source device adapted to emit abeam (11) of broad-band light is provided in the region of the tip portion (21). The beam (11) of broad-band light comprises different wavelength bands (2a, 2b, . . . , 2n) which are differently modulated. At least one photodetector (27a, 27b, 27c) for detecting broad-band light is provided in a region adapted to be inserted into the turbid medium of the shaft portion (21).
摘要:
The invention relates to a multivariate calibration which can be used when the optical system used for that method does not comprise a multi-channel detector such as a CCD sensor or a line array of photodiodes. An optical system without a multi-channel detector doesn't allow to carry out preprocessing steps. Thus there is the need to carry out these preprocessing steps in another way. It is suggested to partially replace the preprocessing step by a measurement of the optical signal, whereby the measurement comprises transmitting or reflecting the optical signal by an optical element, thereby weighing the optical signal by a spectral weighing function. The advantage of the invention is to teach how such an optical system without a bulky and expensive CCD sensor can be used to carry out a multivariate calibration and preprocessing steps.
摘要:
The invention relates to a method and device (1) for imaging an interior of a turbid medium (55). A turbid medium (55) inside a measurement volume (15) is irradiated from a plurality of source positions (25a) with light from a light source (5), and light emanating from the measurement volume (15) is detected from a plurality of detection positions (25b). An image of the interior of the turbid medium (55) is reconstructed from the detected light. In both the method and the device (1), detector signals can be amplified for each source position-detection position pair by a multi-gain amplification unit comprising an amplifier circuit (60). The amplification factor is selected from a number of possible amplification factors based on detected signal strength in the prior art. According to the invention, however, the method and device are adapted such that the amplification factor is selected for at least one source position-detection position pair on the basis of an estimate of expected electrical signal strength.
摘要:
A display device is provided in which the electro-optical effect is created through bending of bendable elements, particularly nanowires or nanotubes. Arrays of bendable elements are provided in areas of the display with the light path. This is possible in that the bendable elements are transparent in the case where they are oriented substantially perpendicular to the substrate, but will absorb light if bent at an angle. Hereto, it is of importance that polarized light is used. The bendable elements are preferably separated from the electrodes through a layer of dielectric material, and are bent under the influence of an electric or magnetic field.
摘要:
An optical diffraction element (1) comprises a diffraction layer (4) which is divided into diffraction strips (6) alternating with intermediate strips (8). The diffraction strips comprise nano-elements (10) which are aligned in one direction and absorb radiation (b) which is linearly polarized in this direction. The diffraction element may be a linear or two-dimensional grating (1) or a Fresnel lens (160). The polarization-sensitive grating can be used in optical systems in which only radiation with a specific polarization direction should be diffracted, or in an optical record carrier to allow reading of an information structure with high spatial frequencies.
摘要:
A lithographic apparatus equipped with an improved alignment system, is presented herein. In one embodiment, the apparatus comprises a radiation system for providing a projection beam of radiation, a support structure for supporting a patterning device that configures the projection beam according to a desired pattern, a substrate holder for holding a substrate, projection system for projecting the patterned beam onto a target portion of the substrate, and an alignment system. The alignment system comprises a radiation source for illuminating at least one mark which is usable for alignment on a substrate and an imaging system for imaging light which has interacted with the at least one mark to generate alignment information.