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 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 present invention provides a spectroscopic apparatus, a method and a computer program product for determining the concentration of an analyte of a fluid that flows through a capillary vessel of a biological sample. The spectroscopic apparatus makes use of an imaging system for determining the position of at least one biosensing substrate that has been implanted into the biological sample in the proximity of the capillary vessel but outside the capillary vessel. The biosensing substrate is capable of inducing surface-enhanced spectroscopic effects and is preferably adapted to reversibly and selectively bind a certain analyte or molecule of the fluid, to which the vessel wall of the capillary vessel is at least semi-permeable. By performing a spectroscopic analysis not directly inside the capillary vessel but in close proximity to the capillary vessel, the signal-to-noise ratio of the spectroscopic signals obtained can be appreciably enhanced while disadvantageous scattering and interference effects can be minimized.
摘要:
An optical device comprises a light source (301) for generating a radiation beam, a reflective diffractive structure (304) for reflecting and diffracting said radiation beam along an optical path (PP), imaging means (305) for imaging the radiation beam after it has been reflected and diffracted by said reflective diffractive structure, and a holographic beam splitter (303) between said reflective diffractive structure and said imaging means along said optical path. Such an optical device can be used for recording data into a holographic medium.
摘要:
For optical data storage applications, for example, for holographic storage applications, a radiation beam (12) with a flat intensity profile is needed. The radiation source device (1) of the invention comprises a beam shaper element (5) and a collimating element (7) between a semiconductor laser (3) and an output coupler (9) and provides such a radiation beam (12) with an increased efficiency. An external resonator is thereby provided. Further, a relatively fast tuning of the wavelength of the output radiation beam (12) can be provided.
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:
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:
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:
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.