5 results about "Leaky mode" patented technology

The present application relates to a kind of based on micro-nano fiber and scattering medium substrate coding element and speckle spectrometer.The coding element includes sealed cavity, micro-nano fiber and scattering medium substrate;Including drawstring transition zone and waist zone in the body of micro-nano fiber, drawstring transition zone forms leaky mode, waist zone generates evanescent field, the body of micro-nano fiber penetrates sealed cavity, so that drawstring transition zone and waist zone are located in sealed cavity;Scattering medium substrate is fixed in sealed cavity, and the waist zone of micro-nano fiber is overlapped on scattering medium substrate, scattering medium substrate is used to receive evanescent field and is coupled leaky mode to obtain scattering pattern information;Wherein, in the direction parallel to waist zone, scattering medium substrate includes more than two scattering zones, and the light transmittance of each scattering zone is different, and the difference between maximum light transmittance and minimum light transmittance is 20%~80%.Speckle spectrometer using the coding element of the present application has the advantages of small size, low cost while high spectral resolution.

The application discloses a spectrometer based on light waveguide leakage mode light splitting and a spectrum reconstruction method thereof. The spectrometer comprises an image sensor and at least one light waveguide, the surface of the image sensor is coated with a substrate layer, the first end of the light waveguide is connected with a light source as an entrance, and the second end of the light waveguide is adsorbed on the surface of the substrate layer after being heated and drawn. The spectrum reconstruction method comprises the following steps: calibration: the photocurrent value of the sensor unit at each wavelength is saved as a spectral response function; collecting photocurrent: collecting the photocurrent value of the to-be-detected light in any sensor unit; constructing an equation set and solving: obtaining k actual spectral functions of the to-be-detected light, solving the corresponding photocurrent equation and composing a linear equation set, and solving to obtain the reconstructed actual spectral function of the to-be-detected light. The application has the advantages of small physical volume, multi-channel detection and accurate detection result.

This invention discloses a thin liquid crystal display assembly employing optical fiber light guiding. A reinforcing glass layer is located on the top layer and connected to the liquid crystal screen via a first optical adhesive layer. The first optical adhesive layer has a refractive index of 1.4-1.5 and is doped with diffused particles. An optical fiber plate is located on the bottom layer, and the optical fiber is bonded to the optical fiber plate via a second optical adhesive layer. The optical fiber includes an inner core and an outer core. One end of the optical fiber extends from the optical fiber plate to a light source coupler. The light source coupler contains a triangular pyramidal cavity for fixing the optical fiber and reflecting light, and a backlight source is disposed within the cavity for emitting light. Multiple circular holes are formed on the outer core facing the liquid crystal screen to generate a leaky mode in the optical fiber. The circular holes are denser near the light source coupler and sparser further away. This design significantly reduces the overall thickness and weight.

A multilayered sensor includes an optical waveguide and a multilayered heterostructure coupled to the waveguide that includes a plurality of concentric thin-film sorbent layers, wherein the multilayered heterostructure is one or more of: (i) structured to enable molecular sieving and filtering of the plurality of analytes within the sorbent layers of the multilayered heterostructure, (ii) structured such that at least one of the analytes will interact differently with different sorbent layers of the multilayered heterostructure, and (iii) structured to exhibit spectral dependence of penetration depth within the multilayered heterostructure of evanescent / leaky mode / lossy mode light originating from the optical waveguide. Also, method of training an inference model is provided that uses training data that comprises a combination of physics simulated synthetic data for the sensor node and empirical data for the sensor node.

A leaky-mode acousto-optical modulator may be used to generate visual images suitable for direct viewing, without image-forming optics. To extend a field of view of the modulator to limits suitable for visual displays, an array of acoustic transducers is coupled to a waveguide along its length. Each acoustic transducer generates an acoustic wave causing a corresponding leaky mode to appear. A reflector is disposed proximate each transducer for directing the out-coupled light portion at a unique angle, providing a corresponding field of view portion for that direction. The field of view portions coalesce into a continuous synthetic field of view suitable for wide-angle visual display applications.