Abstract:
A planar sample, particularly of the type used in biological laboratories for detection and sometimes analysis of two-dimensional arrays of proteins, nucleic acids, or other biological species, is illuminated by epi-illumination using optically filtered line lights that are arranged along opposing parallel sides of a rectangle in which the sample array resides, with two coaxial line lights on each side of the rectangle, and the two on any given side being separated by a gap whose optimal width depends on the wavelength band transmitted by the optical filter. Surprisingly, the gap eliminates the peak in intensity at the center of the sample area and the decrease that occurs from the center outward that would otherwise occur with a single continuous filtered line light, producing instead a substantially uniform intensity along the direction parallel to the line lights.
Abstract:
An attached matter detector (10) includes a plurality of light-emitting elements (11A to 11H, 41 A to 41D) which are aligned linearly and emit light; a plurality of collimator lenses (12A to 12H) which are aligned linearly corresponding to the light-emitting elements (11A to 11H, 41A to 41D), respectively, and collimate the light emitted from the light-emitting elements (11A to 11H, 41A to 41D) as collimated light (L), and emit the collimated light through one surface (17A) of a transparent plate member (17) to the other surface (17B) of the transparent plate member (17); one light-receiving element (15) which receives reflected light (L') from the other surface (17B) of the transparent plate member (17); and an attached matter determiner (16) which determines whether attached matter (S) is attached to the other surface of the transparent plate member (17) or not from the reflected light (L') received by the light-receiving element (15).
Abstract:
An attached matter detector (10) includes a plurality of light-emitting elements (11A to 11H, 41 A to 41D) which are aligned linearly and emit light; a plurality of collimator lenses (12A to 12H) which are aligned linearly corresponding to the light-emitting elements (11A to 11H, 41A to 41D), respectively, and collimate the light emitted from the light-emitting elements (11A to 11H, 41A to 41D) as collimated light (L), and emit the collimated light through one surface (17A) of a transparent plate member (17) to the other surface (17B) of the transparent plate member (17); one light-receiving element (15) which receives reflected light (L') from the other surface (17B) of the transparent plate member (17); and an attached matter determiner (16) which determines whether attached matter (S) is attached to the other surface of the transparent plate member (17) or not from the reflected light (L') received by the light-receiving element (15).
Abstract:
An apparatus for optical inspection of containers (12) includes a light source (14) having at least one light emitting diode (16) with a light emitting die surface (18). Lenses and/or mirrors (20, 43) focus the light emitting die surface onto a selected portion of a container, and a light sensor (24) receives an image of the selected portion of the container illuminated by the light source. An information processor (28) is coupled to the light sensor for detecting commercial variations in the illuminated portion of the container as a function of the image received at the sensor. The image can be developed by transmission of the light energy through the selected portion of the container, and/or by reflection and/or refraction of the light energy at the selected portion of the container. The light source may include a single light emitting diode, or a plurality of light emitting diodes having light emitting die surfaces focused onto the container in such a way that the images of the light emitting die surfaces overlap and/or are adjacent to each other at the container.
Abstract:
This invention relates to an apparatus and method for inspecting multi-layer plastic containers (10). More particularly, the invention relates to such an apparatus and method whereby optical energy absorbing compounds are added to the materials comprising the layer(s) of the container (10) to facilitate inspection thereof. Apparatus comprises a sensor unit (40), an illumination unit (30) for illuminating a portion of electromagnetic spectrum at a near IR wavelength to an inspection zone (20) which is located between the sensor unit (40) and the illumination unit (30). A processing unit (50) which receives an output of the sensor unit (40) and determines the attributes of the multi-layer plastic containers (10).
Abstract:
An illumination head (1) for machine vision has an annular support (2) with first, second, third, and fourth illumination sections (3, 4, 5, and 6). The third section (5) has three sets of LEDs (12, 13, 14) arranged in a pattern so that each set illuminates at approximately the same angle. Each set is driven in succession so that a series of three monochrome images at the same angle are captured. These are superimposed by an image processor to provide a colour image, although the camera is monochrome. More information can be obtained in such a colour image and the high resolution and robustness of monochrome cameras is availed of.
Abstract:
A multi-color fluorescent excitation and detection device comprises at least one illumination module, a cartridge and at least one detection module. The illumination module provides an illumination light at specified range of wavelengths. The cartridge comprises a detection chip comprising plural detection wells arranged around the peripheral of the detection chip. The detection chip is circular shape. Each of the detection wells is accommodated a corresponding fluorescent dye therein. Each of the detection wells includes a first wall and a second wall. The illumination light transmits through the first wall to illuminate on the fluorescent sample so as to excite a fluorescent signal, and the fluorescent signal generated from the fluorescent sample transmits through the second wall. The detection module receives the fluorescent signal and convert the fluorescent signal to an electrical signal.