9 results about "Prism coupling" patented technology

The application discloses a wavelength modulation surface plasmon resonance imaging sensing method, which generates multiple groups of illumination spectra by controlling a light-emitting diode, processes the spectra into p-polarized light, excites a sensing chip to generate surface plasmon resonance through prism coupling, collects corresponding reflected light intensity images by using a CMOS camera, and reconstructs surface plasmon resonance reflection spectra of each pixel on the sensing chip by using a smooth constraint reconstruction algorithm according to intensity observation values of the pixel in all images and corresponding illumination spectrum data, so as to further extract a phase signal and generate a spatially resolved phase image. The phase signal and the imaging scheme realize high-sensitivity and high-throughput sensing performance. The method realizes low-cost, high-signal-to-noise ratio and high-throughput sensing imaging.

The invention relates to the technical field of optical communication, in particular to an optical filter, a single-fiber bidirectional optical device and a packaging method of the single-fiber bidirectional optical device. According to the invention, the first filter and the second filter are integrated on the prism, and the current wavelength is calibrated to be within the preset passband range by controlling the coupling position and angle of the prism. On one hand, the first filter and the second filter are mounted on the same prism, so that the relative mounting precision between the filters can be better ensured; the integrated optical filter can finely adjust the overall optical path in the device by adjusting the overall position of the integrated optical filter, so that the error-tolerant rate is higher; and on the other hand, by accurately controlling the assembling angle of the prism, the packaging yield of the single-fiber bidirectional optical device is improved, the problem of poor actual light splitting effect caused by inaccurate assembling angle can be effectively avoided, and the performance and the stability of the device are improved.

The invention discloses a bifunctional SPR (Surface Plasmon Resonance) biosensor based on an anisotropic material. The bifunctional SPR biosensor comprises a Kretschmann prism coupling structure, the Kretschmann prism coupling structure comprises a prism layer, a coupling dielectric layer, an anisotropic functional layer, a metal layer and a sensing dielectric layer; the prism layer comprises an incident surface, a reflecting surface and a detection surface; the incident surface receives irradiation of detection light, and the reflecting surface outputs the detection light reflected by the detection surface; the detection surface of the prism layer is sequentially covered with a coupling dielectric layer, an anisotropic functional layer, a metal layer and a sensing dielectric layer, the anisotropic functional layer is a two-dimensional material layer with in-plane optical anisotropy, and the anisotropic functional layer comprises a first crystal orientation and a second crystal orientation; the performance optimization mode of the SPR biosensor under surface plasma resonance is switched by changing the crystal orientation of the anisotropic functional layer in the plane; when the anisotropic functional layer is in the first crystal orientation or the second crystal orientation, the SPR biosensor is in an optimized high sensitivity mode or an optimized high quality factor mode.

The application discloses a polarization parameter imaging detection device and method based on surface plasmon resonance. The detection method is as follows: a light source system emits a light beam with stable power and controllable wavelength; the light beam is output as a collimated light beam after entering a collimation system; the collimated light beam is converted into linearly polarized light by a polarizer in a polarization system; the linearly polarized light enters a prism coupling sensing system and is affected by various samples in a micro-flow pool system; the linearly polarized light is excited to different degrees of surface plasmon resonance effect and is emitted; the emitted light beam passes through a wave plate and an analyzer in the polarization system and is received by a photodetector in a photoelectric detection system to form an image. According to the light intensity image, a series of polarization parameter images related to the amplitude and phase of the emitted light beam are calculated by using a polarization parameter imaging algorithm, so that the detection of various samples in the micro-flow pool system is realized. The application has the advantages of high throughput, high detection sensitivity, low detection limit and wide detection range.

Prism coupling systems and methods include using a prism coupling system to collect 2D digital mode spectra of IOX articles. The location and orientation of the mode lines and critical angle are found by performing a weighted fit to the mode lines and critical angle images, and are used to define a compensated mode spectrum. If a mode line tilt is found, it is removed from the 2D digital mode spectrum to define the compensated mode spectrum. The compensated mode spectrum is then processed using techniques known in the art to provide a more accurate estimate of the stress-related properties of the IOX sample relative to the uncompensated mode spectrum. A derivative-based method using derivative spectra and curve fitting to accurately establish the location of intensity transitions in the mode spectrum of an IOX sample is also disclosed.

This invention relates to the field of light source technology, and discloses an optical inspection system integrating multi-angle prism coupling and beam splitting fusion. The system includes: a housing with an installation space and a detection space within it, and a detection port communicating with the detection space on the housing; a camera fixedly connected to the installation space; a semi-transparent, semi-reflective lens disposed below the detection space; a point light source assembly disposed within the detection space, below the semi-transparent, semi-reflective lens; and a first prism and a second prism disposed above the semi-transparent, semi-reflective lens, which are tilted at 45° to the upper side of the detection space in a horizontal projection. A detection method is also provided. This invention achieves multi-field synchronous imaging of the bottom and two sides of a workpiece using a single camera and a single exposure. The three optical paths are independent and do not interfere with each other after precise optical path calibration.

The lithium aluminosilicate glass-based article contains 55.0 mol% to 75.0 mol% of SiO2, 1.0 mol% to 18.0 mol% of Al2O3, and 9.0 mol% to 25.0 mol% of Li2O. The glass-based article has a thickness of less than 0.74 mm, and the fracture toughness of the intermediate surface composition of the glass-based article is 0.75 [Math 1] The compression depth is greater than or equal to TIFF2026522856000041.tif5114 and greater than or equal to 0.14t, where t is the thickness of the glass-based article. The glass-based article is designed to have a single induction mode in the prism-coupled spectrum at wavelengths of 360 nm to 405 nm for at least one of transverse magnetic field polarization or transverse electric field polarization.

The invention discloses a preparation method of a reverse wavelength dispersion optical compensation film for an OLED (Organic Light Emitting Diode) and a polarizer in the technical field of polarizers, and the preparation method comprises the following steps: by taking a polyvinyl alcohol original film as a base material, treating the base material by adopting a spray dyeing method and a wet extension process; a high polymer material with positive inherent birefringence and negative inherent birefringence characteristics is subjected to oblique two-way stretching, a set optical axis angle is formed through the speed difference between the driving side and the operation side, and a 1 / 4 lambda wave plate structure with the reverse wavelength dispersion characteristic is prepared; meanwhile, a prism coupling instrument is selected to measure the refractive indexes in the slow axis direction and the fast axis direction, phase delay is calculated in combination with the relation between birefringence delta n and the film thickness, and accurate control over the wavelength dispersion characteristic is achieved. The obtained optical compensation film is high in polarization degree and stable in phase delay, and the problems of comprehensive color cast and contrast reduction of the OLED display panel under different visual angles are effectively solved.

The application provides a plasmon coupling surface interface in-situ spectrum and imaging test system, which records reflected light intensity or spectrum while changing laser incidence angle, and when the incidence angle of the laser is just in the range of the optical near field and excites surface plasmon polariton of a silver film in a prism coupling manner, the minimum point of the reflected light intensity is observed, that is, surface plasmon resonance, the incidence light is kept to excite the sample at the resonance angle, and at this time, the target molecule system on the surface of the silver film scatters and absorbs the electromagnetic surface wave bound in the near field range, and re-emits the light signal to the far field. The system realizes in-situ combination of surface plasmon resonance, surface enhanced Raman scattering spectrum, total internal reflection fluorescence spectrum and imaging technology by collecting the light signals.