A device for optically identifying surfaces, in particular for optically identifying structured and/or pictorial surfaces, spaces and/or e.g. paintings or sculptures is simple to use independently of the location. For this purpose, the device includes a housing in which light-emitting and light-receiving elements are arranged, and the device also includes a first portion having at least one lens, a portion that follows the first portion in the longitudinal direction and has a screen, and an adjoining handle portion.

An object is to provide a shape measurement system and a shape measurement method that allow deriving a three-dimensional shape of a linear object to be measured over a long distance and with high resolution. A shape measurement system according to the present invention includes: a multi-core optical fiber (10) including a center core (11) arranged in a center of a cross section of the multi-core optical fiber (10) and three or more outer peripheral cores (12) arranged at equal intervals on an outside of the center core (11) and in a concentric manner; a measuring device (20) that measures a backward Brillouin scattering light distribution in a propagation direction of each core of the multi-core optical fiber (10); and an analysis device (30) that computes positional coordinates in a three-dimensional space of a linear structural object having an unknown three-dimensional shape from the backward Brillouin scattering light distribution of the multi-core optical fiber (10) arranged along the linear structural object having the unknown three-dimensional shape and the multi-core optical fiber (10) arranged along a linear structural object having an already-known three-dimensional shape.

This relates to systems and methods for measuring a concentration and type of substance in a sample at a sampling interface. The systems can include a light source, optics, one or more modulators, a reference, a detector, and a controller. The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample.

A system for non-invasively measuring an analyte in a vehicle driver and controlling a vehicle based on a measurement of the analyte. At least one solid-state light source is configured to emit different wavelengths of light. A sample device is configured to introduce the light emitted by the at least one solid-state light source into tissue of the vehicle driver. One or more optical detectors are configured to detect a portion of the light that is not absorbed by the tissue of the vehicle driver. A controller is configured to calculate a measurement of the analyte in the tissue of the vehicle driver based on the light detected by the one or more optical detectors, determine whether the measurement of the analyte in the tissue of the vehicle driver exceeds a pre-determined value, and provide a signal to a device configured to control the vehicle.

A device for identifying water on a surface, including an optical sensor and a processor. The optical sensor is configured to produce a first image of the surface which has a first optical bandwidth within which the water has a first absorption rate, and a second image of the surface which has a second optical bandwidth within which the water has a second absorption rate that is higher than the first absorption rate. The processor is configured to combine the first image and the second image to produce a combined image in which the surface is reduced or eliminated as compared to the water. In addition, the processor is configured to detect water in the combined image.

A fiber optic sensor interrogation system with inbuilt passive power limiting capability based on stimulated Brillouin scattering that provides improved safety performance for use in explosive atmospheres.

The present technology provides methods, systems, and apparatuses to achieve high throughput and high speed acquisition of partial wave spectroscopic (PWS) microscopic images. In particular, provided herein are high-throughput, automated partial wave spectroscopy (HT/A-PWS) instruments and systems capable of rapid acquisition of PWS Microscopic images and clinical, diagnostic, and research applications thereof.

A system, wearable device, and method include a light emitter configured to emit light at a first wavelength of between approximately 900 and 1000 nanometers and at a second wavelength of approximately 1350 nanometers, a first light detector spaced at a first distance from the light emitter, and a second light detector spaced at a second distance from the light emitter, the second distance approximately twice the first distance. At least one of hydration and glycogen of muscle tissue is determinable based on a relationship between backscatter light from the muscle tissue as detected by the second light detector and backscatter light from non-muscle tissue as detected by the first light detector.

Turbidity measurement systems and methods of using the same are described. A turbidity measurement system comprise a vessel configured to hold a wellbore fluid, wherein a permeable obstruction to flow is positioned in the vessel; a light source positioned to direct light at the vessel; a light detector positioned to measure light intensity of light emitted by the light source and passing through the vessel; and a backscatter detector positioned to measure the light intensity of reflected light emitted from the light source.

A method and a device allow optical properties of a sample to be estimated. The method includes the illumination of the sample by a first light source, and the formation of an image of the sample thus illuminated, on the basis of which a first optical property is estimated, at various points on a surface of the sample. The method also includes measuring an auxiliary optical property of the sample and estimating the first optical property, taking account of the auxiliary optical property measured on the sample.