摘要:
A beam-shaping optical element employing an aspherical profileis presented to minimize aberration. A beam-shaping optical element according to the present invention includes an entrance surface and the exit surface, both having a non-circular cross-section in any plane comprising the optical axis. A beam-shaping optical element according to one embodiment of the present invention, has the optical axis coinciding with the Z-axis of a three-axis rectangular XYZ system of coordinates, and the entrance surface and/or the exit surface represented by a mathematical equation comprising a term representing a non-rotationally symmetric aspherical profile, at least one correction term comprising a function of variable X alone and at least one correction term comprising a function of variable Y alone.
摘要:
This invention relates to a servo system for operating an exoskeleton adapted to encircle an object of interest and for supplying a force thereon. A servomotor is coupled to a power source and operates the position of the exoskeleton and thus the force exerted by the exoskeleton on the object of interest. A measuring unit measures a raw driving current signal I raw suplied by the power source to drive the servomotor. A low pass filter applies a low pass frequency filtering on the measured a filtered current signal I filtered. A processing unit determines an actuated current signal I actuated based on the servomotor setting parameters, where I actuated indicates the contribution to I raw from the servomotor when operating the position of the exoskeleton. The processing unit also determines a driving force current signal I force indication the force exerted by the exoskeleton on the object of interest, where I force is proportional to the difference between I filtered and I actuated.
摘要:
This invention relates to a system (100) for adaptively driving a coloured liquid crystal display (102) displaying a sequence of images. The system (100) comprises driving electronics (106) for supplying a driving voltage for each pixel in the display (102), a frame memory (116) for storing a first image of the sequence of images, which first image is presently displayed on said display (102). In addition, the system (100) comprises a look-up table (110) for generating a pre-write signal (108) for the driving electronics (106) based on the first image in the frame memory (116) and a subsequent image to be displayed on the display (102).
摘要:
In an optical scanning device for scanning both a high-density, HD, record carrier (38) and a low-density, LD, record carrier (18), a two-wavelength diode laser (50) is used for generating the HD scanning beam and the LD scanning beam. By arranging a composite diffraction element (60) close to the diode laser (50), which element has a first diffraction structure (63), for combining the HD beam and the LD beam, and a second diffraction structure (64), which acts as a lens for either the LD beam or the HD beam only, a compact device is obtained, which is suitable for writing the LD information layer (40).
摘要:
Stimulation system for indicating stimulation signals to a user, provided with at least one heart beat sensor for converting measured heart beats into a signal, a processing circuit configured to process the measured heart beat signals, a user interface configured to indicate stimulation signals to a user, wherein the processing circuit is configured to calculate intervals between the detected heart beats and register a predetermined number of successive intervals, predict a time interval between a detected heart beat and a predicted future heart beat based on the registered intervals, and instruct the user interface to indicate a stimulation signal to a user non-simultaneously with the predicted heart beat at the end of the predicted time interval so as to change the heart rate and/or heart coherence of the user.
摘要:
The invention provides a method and a device for cleaning of the optical face of a refractive element for a near field optical scanning apparatus. A magnetically susceptible cleaning material is used to facilitate effective cleaning of the refractive element without damage to the element. The method according to the invention can be combined with known cleaning methods if desired.
摘要:
An optical scanning device (1) for scanning an information layer (2) includes a radiation source (6) for supplying a radiation beam (14), a lens system (7) having an optical axis (OO'), and a detection system (8) including: (i) an astigmatism generating element (9) for generating a first amount of astigmatism (W1) represented by a vector (Wo,1, υ1), so as to transform the radiation beam to a first astigmatic radiation beam (29); (ii) an astigmatism correcting element (27) for generating a second amount of astigmatism (W2) represented by a vector (Wo,2, υ2), so as to transform the first astigmatic radiation beam to a second astigmatic radiation beam (30) having a third amount of astigmatism (W3) represented by a vector (Wo,3, υ3), and (iii) a detector (28) for transforming the second astigmatic radiation beam to an electrical signal. According to the invention, W3 is adapted to the detector and that Wo,2 and υ2 comply substantially with the following equation: (Wo,1, 2υ1)+(Wo,2, 2υ2)=(Wo,3, 2υ3).
摘要:
A method of adapting an environment of a terminal(2) includes: -receiving data(27) from an external source at the terminal(2); -receiving monitoring data from a system for monitoring at least one user in the environment; and -controlling at least one output device for providing an output perceptible in the environment, the output being adjusted in dependence on the monitoring data. At least one segment including data pertaining to at least one mental state is retrieved from the data (27) from the external source, and the adjustment in dependence on the monitoring data is effected at least partly on the basis of the data pertaining to the at least one mental state.
摘要:
A method of signal processing, includes obtaining at least one physiological signal from a system (9-12) arranged to monitor at least one user. Data at least based on data representative of at least one characteristic of electrical current drawn by at least one appliance (23,24,28) in an environment in which the at least one user is present is obtained. This data is used to determine an output based on the at least one physiological signal.