Abstract:
Systems and techniques for detecting the presence of foreign material in food utilizing optical backlighting and/or ultrasonic inspection are presented. In optical backlighting, a substantially monochromatic light source optically backlights a food stream with source light having a wavelength between about 500 and 600 nm. An image of the food stream is captured and the presence of foreign material is determined when a portion of the detected image exceeds a predetermined threshold. The technique is especially suitable for the detection of bone in chicken meat, and the light source can be a planar array of green LEDs. In ultrasonic inspection, a process stream is interrogated with pulses of ultrasound and the presence of foreign material is determined based on the detected off-angle ultrasound scattering response.
Abstract:
A machine-vision system that provides quick changing and/or automatic adjustment of illumination angle, dispersion, intensity, and/or color of illumination. One such system includes a light source emitting polarized light, a machine-vision imager, an image processor operative to generate a quality parameter based on an image, and one or more of the means described above for selectively directing the light in a predetermined pattern based on its polarization and based on the quality parameter of the image. Some embodiments include an imager, a controllable light source, first and second optical elements that selectively direct light in first and second patterns, and a controller controlling the light characteristics using the first and/or second light patterns. One method includes setting one or more illumination parameters, illuminating the object based on the illumination parameters, obtaining an image, generating a quality parameter of a region of interest, and iterating using a different illumination parameters.
Abstract:
A method and apparatus for genomic or proteomic research to visualize fluorescent labeled DNA, RNA or protein samples that have been separated for documentation and analysis. The apparatus includes a novel radiation source for uniformly irradiating the samples which comprises an array of UV LEDS. In one form of the invention the apparatus also includes a first conversion plate that is carried by the housing at a location intermediate the radiation source and the sample supporting platform for converting the radiation emitted from the source to radiation at a second wavelength.
Abstract:
Systems and techniques for detecting the presence of foreign material in food utilizing optical backlighting and/or ultrasonic inspection are presented. In optical backlighting, a substantially monochromatic light source optically backlights a food stream with source light having a wavelength between about 500 and 600 nm. An image of the food stream is captured and the presence of foreign material is determined when a portion of the detected image exceeds a predetermined threshold. The technique is especially suitable for the detection of bone in chicken meat, and the light source can be a planar array of green LEDs. In ultrasonic inspection, a process stream is interrogated with pulses of ultrasound and the presence of foreign material is determined based on the detected off-angle ultrasound scattering response.
Abstract:
A machine for inspecting the heal code of a bottle. The bottle is supported vertically at an inspection location and a camera having an imaging area is located vertically beneath the bottle. A horizontally disposed annular ring light directs an annular beam of light upwardly at a heal code of a supported bottle and light reflected from a heal code is reflected by an annular concave surface located concentrically below the annular ring light to the imaging area of the camera.
Abstract:
A light emitting diode lighting apparatus that includes: a power supply for providing a fixed direct current; a light emitting diode head for emitting light; and a controller for adjusting the level of said light output on said head and compensating for efficiency altering effects of said light in said power head, whereby said controller receives signals for optical feedback stabilization, temperature compensation, and detection of short term current changes to adjust said light and efficiency.
Abstract:
Proposed are a device and method for checking for a surface defect, using an image sensor. The device can increase accuracy in detecting defects of various types, shapes, or directions, and include: a frame part for providing a transport path of an object to be checked, along the lengthwise direction parallel to the ground surface; a transport part provided on one side of the frame part so as to transport the object to be checked, along the transport path; and an image sensor part provided in the middle of the transport path so as to capture an image of the surface of the object to be checked, from above the transported object to be checked.
Abstract:
A method and a device for detecting plastic foreign objects with low chromaticity difference in shredded tobacco through online pulse spectral imaging are provided. The method includes three steps: negative pressure thin-layer loading of shredded tobacco, pulse line-scanning identification of shredded tobacco, and positive pressure online elimination of foreign objects. Loose shredded tobacco is formed into a fixed and continuous thin layer on a surface of a conveying cylinder under the effect of a negative pressure adsorption force. The surface of the conveying cylinder is coded by areas. An LED linear array light source containing characteristic wavelengths of plastics with low chromaticity difference emits optical pulses, and a line-scanning camera is used to obtain characteristic signals of the plastic foreign objects with low chromaticity difference efficiently in real time.
Abstract:
This invention relates generally to devices, systems, and methods for performing biological assays by using indicators that modify one or more optical properties of the assayed biological samples. The subject methods include generating a reaction product by carrying out a biochemical reaction on the biological sample introduced into a device and reacting the reaction product with an indicator capable of generating a detectable change in an optical property of the biological sample to indicate the presence, absence, or amount of analyte suspected to be present in the sample.
Abstract:
The present invention teaches an apparatus for consistent and accurate on-site readings of fluorescence signals of coronavirus test result, with which a user directly reads a fluorescent light qualitatively instead of using electronic sensors. The fluorescent light is excited from a fluorescent source in a site of interest in a target assay. The device comprises a light source for generating an excitation light for exciting the fluorescent source of the target assay to generate a fluorescent light, a component for accurately transmitting the excitation light and the fluorescent light with less noise or reflection, a component for consistent detecting of the fluorescent source by bare eyes with minimal health risks, and a user control system that requires minimal training.