34 results about "Polarized light imaging" patented technology

Disclosed herein is an imaging device that includes a photographing lens configured to focus light from a subject, a splitter configured to split the focused light to left and right in an area, in which light diffused from one point of the subject becomes parallel light, so as to respectively form different polarized lights, an imaging lens configured to respectively image the split different polarized lights, a transmission unit configured to receive the imaged different polarized lights on the same plane so as to transmit any one of the polarized lights in each area of the plane, an imaging element configured to convert the transmitted light on the plane into an image according to an electronic signal, and an image generating unit configured to extract and interpolate the converted image in each area so as to generate two different images.

An imaging device includes a photographing lens configured to focus light from a subject, a splitter configured to split the focused light to left and right in an area, in which light diffused from one point of the subject becomes parallel light, so as to respectively form different polarized lights, an imaging lens configured to respectively image the split different polarized lights, a transmission unit configured to receive the imaged different polarized lights on the same plane so as to transmit any one of the polarized lights in each area of the plane, an imaging element configured to convert the transmitted light on the plane into an image according to an electronic signal, and an image generating unit configured to extract and interpolate the converted image in each area so as to generate two different images.

The invention relates to a near-infrared blood glucose detection device and equipment based on polarized light imaging, wherein the device comprises a processor, and when the processor runs in a computer program stored in a computer readable storage medium, the following steps are realized: S1, establishing a double-layer skin optical model of a human body according to the skin condition of the human body; S2, setting relevant optical parameters of photons propagating in the skin, and establishing a Monte Carlo simulation process; S3, carrying out Monte Carlo simulation calculation to obtain a Mueller matrix of the back of the human body skin; S4, calculating through each array element of the Mueller matrix to obtain each polarization parameter; and S5, comparing the change rate of each polarization parameter along with the scattering coefficient and the absorption coefficient to obtain a specific polarization parameter which is better than the specific polarization parameter of a method which is used for extracting the absorption information of the blood glucose only by using the light intensity information. According to the device, the shallow surface layer scattering influence is reduced based on polarization parameters, so that other microstructure information such as deep absorption is obtained, the signal-to-noise ratio of blood glucose detection can be increased, and the deep absorption measurement precision is improved.

The invention provides a high-precision real-time three-dimensional measurement system and method for measuring micro defects on the surface of an aviation component. The system comprises a light source system, a polarized light modulation subsystem, a to-be-measured target, a detection and acquisition system and a computer processing system which are sequentially arranged along a light path; the polarized light modulation subsystem comprises a light beam collimation assembly and a polarization state modulation assembly which are sequentially arranged along the light path. Modulation of two beams of circularly polarized light with opposite rotation directions is realized by adopting the polarization grating, and the system is simple, compact and convenient to integrate and carry; according to the invention, a focal plane type polarization detector is adopted, four polarization images can be obtained at the same time, images under four phase shifts can be obtained through single exposure, and the three-dimensional shape of the surface defect of a to-be-detected part is solved in real time; by means of the polarized light imaging, light beam stability is good, accuracy is high, strong reflection flare light on the surface of a component can be effectively eliminated, and the imaging effect is better.

The invention mainly discloses a polarized light optical system for a camera of an endoscope device. The polarized light optical system comprises an optical adapter and an optical splitter which are sequentially arranged from the object side to the image side in the axial direction. The optical splitter has the optical characteristics of dividing the wavelength of light into three wave bands of R, G and B and a special light wave band of lambda-700nm for selection, and lambda is an arbitrary value in a range of 600nm-670nm; light waves of one wave band are transmitted, and light waves of the other three wave bands are reflected at the same time; the common white light image and the polarized light image in the operation can be obtained at the same time, and the common white light image and the polarized light image are complementary to each other. Under the condition that the environment is blurred in the operation, the polarized light imaging can provide clearer images, and the functions of blood penetration, bone residue penetration and the like are achieved, so that the operation view in the operation can be kept clear continuously, and the safety and effectiveness of the operation are greatly improved.

The invention discloses a method for calculating the energy of a polarized light imaging system under complex weather, belonging to the field of optical detection theory research, including determining polarized light imaging conditions and environmental conditions, target and detector parameters under complex weather; calculating solar radiation energy in the detector The irradiance to the target in the response band; use the 6S atmospheric radiation transfer model to determine the polarized reflectance of the target; obtain the brightness of the target’s indirect radiation; use Modtran4.0 software to determine the average transmittance of the detector in the response band; use zemax software to determine The transmittance of the optical system; obtain the central illuminance of the detector image plane, the light energy at the entrance pupil of the optical system, the number of electrons generated by the target on the detector, the total noise of the system and the signal-to-noise ratio; use Matlab / VC++ programming software, according to the above The software is compiled during the process, and the analysis and optimization iterations are carried out; finally, a polarized light imaging system that meets the energy requirements and signal-to-noise ratio requirements is formed.

Provided is a position detecting device including: a light emission unit configured to emit light in a predetermined wavelength band in a manner substantially parallel to a plane surface; a polarization filter configured to transmit p polarized light of light reflected on the plane surface and to block s polarized light thereof; and an imaging unit configured to perform imaging of the plane surface obliquely from above with the light in the predetermined wavelength band through the polarization filter.

The invention provides an orthogonal polarized light imaging diffractive optical device based on a super-structure surface. The orthogonal polarized light imaging diffractive optical device is composed of a substrate and sub-wavelength optical antennas arranged on a surface of the substrate in an array mode, wherein the sub-wavelength optical antenna array is a two-dimensional array, directions parallel to the row and the column of the sub-wavelength optical antenna array are used as an x axis and a y axis respectively, the cross section shape of each optical antenna along the xy plane has C2symmetry, the length and the width of each optical antenna are respectively 1 / 20 to 1 / 2 of the working wavelength, the heights of the optical antennas are equal and are in a sub-wavelength range, anda center distance between two adjacent optical antennas is equal and does not exceed half of the working wavelength; the transmission phase is applied to the orthogonal linearly polarized light by designing the length and width of each optical antenna, and the transmission phase and the geometric phase are simultaneously applied to the orthogonal circularly polarized light by designing the lengthand width and the rotation angle of each optical antenna. The orthogonal polarized light imaging diffractive optical device is advantaged in that simultaneous focusing imaging of different positions of the orthogonal polarized light can be realized by using one unit structure.

The invention discloses a water drop detection system for an optical mirror surface, which is used for detecting water drops attached to the surface of the optical mirror surface and comprises a polarized light acquisition device, an image acquisition device and a control processor. The polarized light acquisition device is used for polarizing and refracting reflected light on the surface of the optical lens to acquire polarized light. The image acquisition device is used for acquiring polarized light images. The control processor is used for detecting water drops on the surface of the optical lens according to the polarized light image. The water drop detection is carried out through the polarized light imaging of the reflected light on the surface of the optical lens, so that the influence of the reflection background can be filtered to a certain extent, and the recognition accuracy of the adhered water drop and the robustness to the environment are improved.