44 results about "Radiation propagation" patented technology

An interactive display that uses a planar radiation guide (such as a planar light guide) to perform display and / or imaging. The planar radiation guide has a radiation propagation portion and a radiation interface portion. The radiation propagation portion propagates the radiation by the principles of total internal reflection (with perhaps some minor leakage). The planar radiation guide also has a radiation interface portion where radiation is more apt to exit or enter the planar radiation guide. The interactive display performs both display and imaging, while the planar radiation guide is used to perform at least one (but perhaps both) of the display and imaging operations.

A multibeam coherent laser diode source comprises a master laser, a linear amplifier and two perpendicular amplifiers. The master laser and amplifiers are in the form of a single heterostructure containing an active layer, two limiting layers and a radiation influx area with an influx layer. The heterostructure is characterized by the ratio of the refractive index of the heterostructure to the refractive index of influx layer. This ratio is determined from a range extending from one plus delta to one minus gamma, where delta and gamma are defined by a number much less than one and gamma is greater than delta. The linear amplifier is positioned so that optical axis of radiation propagation from master laser coincides with the axis of the linear amplifier. Each perpendicular amplifier has output edge and is positioned so that its optical axis is situated at right angle to the axis of linear amplifier.

An optical radiation coupling module includes a waveguide for the propagation of optical radiation, an optoelectronic device arranged on a substrate, and a mechanism for coupling the radiation between the waveguide and the optoelectronic device. The coupling mechanism includes a guiding element moulded and tapered in a radiation propagation direction.

The invention relates to a structure characterising device comprising means which are used for generating a first pump radiation and a second probe radiation and for transmitting different wavelength radiation, means for producing a time offset between said first pump and second probe radiation on the structure by means of detecting means of said second beam after the reflection or transmission thereof to said structure in such a way that an analysis signal is generated, means for processing said signal and identifying an area corresponding to the signal jump, for determining the jump amplitude according to different wavelengths, for comparing said amplitude with a theoretical amplitude variation pattern according to the wavelengths and for determining, for the wavelength characteristic for said theoretical pattern, a characteristic value associated to the structure thickness and to the radiation propagation velocity in said structure.

The present invention relates to an apparatus for determining agricultural relevant information in an agricultural environment. It is described to provide (210) a processing unit with at least one image of an agricultural area. The at least one image was acquired by at least one satellite and / or at least one aerial vehicle such that the at least one image was acquired through a substantial depth of the Earth's atmosphere. The at least one image corresponds with at least one area of the agricultural area such that each image of the at least one image corresponds to a different area of the agricultural area. The at least one image comprises remotely acquired reflectance intensity data relating to a plurality of features on the ground. An image of the at least one image is of a first area ofthe agricultural environment. The processing unit is provided (220) with at least one sensor data relating to the first area of the agricultural environment. The at least one sensor data was acquiredby at least one ground based and / or at least one near ground based sensor. The processing unit implements (230) a radiation propagation model of the atmosphere that utilizes at least one model parameter. The at least one model parameter comprises at least one atmospheric scattering coefficient. The processing unit determines (240) modified at least one model parameter. The determination comprisesutilization of the radiation propagation model, the remotely acquired reflectance intensity data of the image of the first area and the at least one sensor data relating to the first area. The processing unit determines (250) at least one agricultural relevant information for an examination area of the at least one area. The determination utilizes the radiation propagation model, the modified at least one model parameter and an image of the at least one image that is of the examination area of the at least one area.

A system for conversion or amplification using quasi-phase matched nonlinear optical wave-mixing includes a first radiation source for providing a pump radiation beam, a second radiation source for providing a signal radiation beam, a bent structure for receiving the pump radiation beam and the signal radiation beam, and an outcoupling radiation propagation portion for coupling out an idler radiation beam generated in the bent structure. A radiation propagation portion of the bent structure is made of a uniform three-dimensional material at least partly covered by a two-dimensional or quasi-two-dimensional material layer and has a dimension taking into account the spatial variation of the nonlinear optical susceptibility along the radiation propagation portion as experienced by radiation traveling along the bent structure for obtaining quasi-phase matched nonlinear optical wave-mixing in the radiation propagation portion. The dimension thereby is substantially inverse proportional with the linear phase mismatch for the nonlinear optical process.

An optical resonator has an internal cavity with an output coupler, an end mirror, and one or more active mirror amplifiers (AMAs) that are arranged in a manner to form a laser radiation propagation path within the cavity which substantially has the form of a star polygon trajectory.