4091 results about "Near infrared light" patented technology

A video input processor is disclosed. The processor includes: an imaging signal-generating portion configured to image a subject and producing first imaging signals containing visible light components and a second imaging signal containing near-infrared light components; a gain adjustment portion configured to adjustably set a maximum gain value according to a relative magnitude between the visible light components and the near-infrared light components and adjust a gain for the first imaging signals at the set maximum gain value; and a noise reduction portion configured to reduce noises in the first imaging signals after the gain has been adjusted.

An imaging system for acquisition of NIR and full-color images includes a light source providing visible light and NIR light to an area under observation, such as living tissue, a camera having one or more image sensors configured to separately detect blue reflectance light, green reflectance light, and combined red reflectance light/detected NIR light returned from the area under observation. A controller in signal communication with the light source and the camera is configured to control the light source to continuously illuminate area under observation with temporally continuous blue/green illumination light and with red illumination light and NIR excitation light. At least one of the red illumination light and NIR excitation light are switched on and off periodically in synchronism with the acquisition of red and NIR light images in the camera.

An exemplary system, method and computer-accessible medium for determining resultant information about a portion(s) of a tissue(s), can include, for example, receiving initial information which is based on a particular radiation that is returned from the portion(s), the particular radiation can be is based solely on an interaction between the portion(s) and a near-infrared radiation forwarded to the portion(s), and determining the resultant information about the portion(s) of the tissue(s) based on the initial information. The near-infrared radiation can be provided by a near-infrared light optical arrangement that can include a diffusely reflected near-infrared light arrangement. A depth of a lesion to be ablated can be determined by the near-infrared radiation based on the initial information. The initial information can include data corresponding to a reflectance spectrum(s) of the portion(s).

A coronary access catheter system simplifies the insertion of objects into distal branches of the coronary sinus. The system incorporates a real-time forward-imaging means to view the os and the branches of the coronary sinus. Preferably, the catheter uses near-infrared light as the forward-imaging means, but it could also include ultrasound or electromagnetic transducer. As the image is viewed, the catheter tip can be steered into the coronary sinus os and deflected in a tight radius bend on the distal end to navigate the short radius, right angle turns found in the coronary sinus branches. At that point, a flexible sheath can be placed over the guide catheter or objects such as guidewires can be inserted into channels of the guide catheter. The system consists of a catheter and image acquisition unit, which displays the forward image.

A processor with a personal verification function has a mouse used by a hand to operate a terminal (personal computer or personal computer main body) and being able to output a photographic blood vessel image obtained by photographing a blood vessel image of the palm of the hand, and a verifying unit carrying out personal verification at a desired time on the basis of the photographic blood vessel image outputted from the mouse and a registration blood vessel image. The mouse has a radiating unit radiating near-infrared light toward the palm of the hand, and a photographing unit photographing the photographic blood vessel image with reflected light from the palm of the hand. The processor with a personal verification function and an operating device make possible personal authentication and personal identification at any time, and are operable within a saved-space without placing a burden on the user.

Methods and apparatus for measuring cerebral O₂ saturation and detecting cerebral hypoxia-ischemia using multi-wavelength near infrared spectroscopy (NIRS). Near-infrared light produced by an emitter is directed through brain tissue. The intensity of the light that passes through the brain tissue is measured using photodiode detectors positioned at distinct distances from the emitter. This process is conducted for at least three wavelengths of near-infrared light. One of the wavelengths used is substantially at an isobestic point for oxy-hemoglobin and deoxy-hemoglobin, but the other two may be any wavelengths within the near-infrared spectrum (700 nm to 900 nm), so long as one of the additional wavelengths is greater than the isobestic point and the other is less than the isobestic point. Tissue oxygenation is calculated using an algorithm derived from the Beer-Lambert law. Cerebral hypoxia-ischemia may be diagnosed using the calculated tissue oxygenation value.

The present invention enables permanent biometric authentication without the risk of forgery or the like. The present invention enables living-tissue discrimination as well as biometric authentication. The roughness distribution pattern of deep-layer tissue of the skin covered with epidermal tissue is detected, thereby extracting a unique pattern of the living tissue. Then, biometric authentication is performed based upon the detected pattern. The roughness distribution pattern of the deep-layer tissue of the skin is optically detected using difference in optical properties between the epidermal tissue and the deep-layer tissue of the skin. In this case, long-wavelength light, e.g., near-infrared light is used as illumination light cast onto the skin tissue. A fork structure of a subcutaneous blood vessel is used as the portion which is to be detected, for example. The portion which is to be detected is determined based upon the structure of the fork structure. In this case, the living-tissue discrimination may be made using the subcutaneous blood vessel.

The present invention relates to an apparatus and a method for recognizing a subcutaneous vein pattern. More particularly, the present invention is directed to an apparatus for recognizing a subcutaneous vein pattern comprising: a light illuminator having an NIR (near infrared light) emitting device; an image acquisitor having a lens and an image sensor which converts light reflected from subcutaneous vein into an image signal; a microprocessor which adjusts an illuminating intensity of the light illuminator and a light receiving sensitivity of the image acquisitor according to an illuminance estimated from the image signal; and a displayer which display image signals received from the microprocessor.

A monitoring system monitors and/or predicts drowsiness of a driver of a vehicle or a machine operator. A set of infrared or near infrared light sources is arranged such that an amount of the light emitted from the light source strikes an eye of the driver or operator. The light that impinges on the eye of the driver or operator forms a virtual image of the signal sources on the eye, including the sclera and/or cornea. An image sensor obtains consecutive images capturing the reflected light. Each image contains glints from at least a subset or from all of the light sources. A drowsiness index can be determined based on the extracted information of the glints of the sequence of images. The drowsiness index indicates a degree of drowsiness of the driver or operator.

The optical filter of the present invention is provided with a near infrared light absorption layer that contains a component composed of copper ions and a phosphoric ester compound expressed by the following Formula (10), in which the phosphorus atom content in the near infrared light absorption layer is 0.4 to 1.3 mol per mole of copper ions, and the copper ion content in the near infrared light absorption layer is 2 to 60 wt %. Thus keeping the phosphorus atom and copper ion content within specific ranges results in good near infrared light absorption and in improved moisture resistance whereby devitrification caused by whitening is suppressed

The invention discloses a human face recognition method which is based on Gabor information fusion of visible light and near-infrared light. The method comprises: human face images under a visible light source and a near-infrared light source are respectively collected, Gabor features of the two images are respectively extracted to be fused at a feature layer; an AdaBoost algorithm is adopted to carry out the feature selection on the feature after the fusion, and the nearest neighbor classification is adopted to carry out the calculation and the classification on the similarity thereof. The human face recognition method has very high accuracy rate and excellent robustness of the impacts of light illumination on the human face recognition; in addition, compared with other methods, the human face recognition method has the advantages of small number of the used features, rapid classification speed, etc.

A high-transparency, low-emissivity window film or coating is designed to maximize so-called greenhouse heating. This effect is achieved through the use of conductive grids and/or gratings whose width and spacing has been selected such that the grid appears as a uniform conductive film to long-wavelength infrared (blackbody) radiation. The conductive grid film reflects the blackbody radiation strongly, and such that the grid appears highly transparent to visible and near-infrared light, and therefore transmits it.

The invention provides a transparent thermal insulation anti-ultraviolet coating and a preparation method thereof, belongs to the technical field chemical industry, materials and environmental protection and relates to the transparent thermal insulation anti-ultraviolet coating which can reduce the transmission of solar energy and ultraviolet and the preparation method thereof. The coating comprises nano-slurry with the thermal insulation anti-ultraviolet function and a film-forming substance, and is combined with the synergistic effects of a wetting dispersant and a hyper-dispersant for preparing the nano-slurry with high solid content and stable dispersion. The preparation process of the coating is simple and can greatly improve the solid content of the coating, ensure the optical effect of a paint film after coating, simultaneously organically combined powder with different functions and obtain the thermal insulation anti-ultraviolet functional coating with satisfactory effects. The coating has the characteristics of low transmission of ultraviolet and near infrared light of solar rays, high transmission of visible light and the like, and can be coated on glass, polycarbonate or organic glass and other transparent materials, and achieve the purposes of energy conservation and protection.

Disclosed herein is a solid-state image pickup device, including: a first pixel for receiving a visible light of an incident light to subject the visible light to photoelectric conversion; a second pixel for receiving the visible light and a near-infrared light of the incident light to subject each of the visible light and the near-infrared light to the photoelectric conversion; a color filter layer; and an infrared light filter layer for absorbing or reflecting an infrared light, and transmitting the visible light.

An apparatus for obtaining area images and optical coherence tomography (OCT) image of a tissue comprises an image sensor, a first illumination means providing broadband polarized polychromatic light, a second illumination means providing narrow-band ultraviolet light, a third illumination means providing Near-Infrared light, an optical coherence tomography (OCT) imaging apparatus, one or more polarization elements, and an optical filter. An image processor identifies a region of interest according to area image, which can be a polarized reflectance image, a fluorescence light image, or both for the OCT imaging apparatus to obtain an OCT image over the region of interest.

The invention discloses a method for non-damage measuring the tea polyphenol content in tea, based on near-infrared spectrum technique, which comprises that first building a correct model, collecting tea sample as correct sample group, scanning the correct sample group to obtain visible light spectrum and near-infrared light spectrum (325-2500nm), processing spectrum pretreatment on the spectrum data, then using international standard method to measure the tea polyphenol content of correct sample, using multi-element correct regression algorism to build the quantitative relationship between the near-infrared spectrum and the tea polyphenol content of the correct sample, to build the correct model. The invention only needs to scan the near-infrared spectrum of object tea, and input pretreated spectrum data into the correct model which can test the tea polyphenol content. The whole process is controlled by a computer, to realize data pickup, store, display and process functions.