摘要:
A vision system is provided to determine a positional relationship between a semiconductor wafer on a platen and an element on a processing machine, such as a printing screen, on a remote side of the semiconductor wafer from the platen. A source directs infrared light through an aperture in the platen to illuminate the semiconductor wafer and cast a shadow onto the element adjacent an edge of the semiconductor wafer. A video camera produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. The edge of the semiconductor wafer in the image is well defined by a dark/light transition.
摘要:
A system and method for automated determination of position and movement of a contact lens with respect to a subject wearer's eye based upon a complimentary pair of images, acquired in rapid succession, in which one image of the pair is acquired using light that allows viewing of the pupil and/or limbus through the lens and the other image is acquired using light that is absorbed by the lens to generate an opaque image with a defined edge relative to the surrounding sclera. The images of the pair are acquired in close enough temporal proximity to ensure that eye movement in the interval therebetween is insignificant and both images are in the same approximate reference frame. Thus, the location of the pupil and limbus in one image can be accurately compared with the location of the contact lens edge in the other image.
摘要:
An apparatus for associating codes on parts with part spaces on a conveyor wherein each part has a leading edge and a trailing edge that define a part space and each part is to be marked with at least one code, the apparatus comprising an area scan camera having a two dimensional field of view (FOV), the camera supported adjacent the conveyor so that parts conveyed by the conveyor pass through the FOV, a processor linked to the area scan camera, the processor programmed to perform the steps of receiving images from the area scan camera, identifying the locations of codes on parts in at least one of the images wherein a code located is a located code, identifying the locations of leading and trailing edges of parts wherein the leading and trailing edges define part spaces and associating each located code with a part space that includes the location of the located code.
摘要:
A vision system is provided to determine a positional relationship between a semiconductor wafer on a platen and an element on a processing machine, such as a printing screen, on a remote side of the semiconductor wafer from the platen. A source directs ultraviolet light through an aperture in the platen to illuminate the semiconductor wafer and cast a shadow onto the element adjacent an edge of the semiconductor wafer. A video camera produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. The edge of the semiconductor wafer in the image is well defined by a dark/light transition.
摘要:
A vision system is provided to determine a positional relationship between a semiconductor wafer on a platen and an element on a processing machine, such as a printing screen, on a remote side of the semiconductor wafer from the platen. A source directs ultraviolet light through an aperture in the platen to illuminate the semiconductor wafer and cast a shadow onto the element adjacent an edge of the semiconductor wafer. A video camera produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. The edge of the semiconductor wafer in the image is well defined by a dark/light transition.
摘要:
An apparatus for associating codes on parts with part spaces on a conveyor wherein each part has a leading edge and a trailing edge that define a part space and each part is to be marked with at least one code, the apparatus comprising an area scan camera having a two dimensional field of view (FOV), the camera supported adjacent the conveyor so that parts conveyed by the conveyor pass through the FOV, a processor linked to the area scan camera, the processor programmed to perform the steps of receiving images from the area scan camera, identifying the locations of codes on parts in at least one of the images wherein a code located is a located code, identifying the locations of leading and trailing edges of parts wherein the leading and trailing edges define part spaces and associating each located code with a part space that includes the location of the located code.
摘要:
A system and method for automated determination of position and movement of a contact lens with respect to a subject wearer's eye based upon a complimentary pair of images, acquired in rapid succession, in which one image of the pair is acquired using light that allows viewing of the pupil and/or limbus through the lens and the other image is acquired using light that is absorbed by the lens to generate an opaque image with a defined edge relative to the surrounding sclera. The images of the pair are acquired in close enough temporal proximity to ensure that eye movement in the interval therebetween is insignificant and both images are in the same approximate reference frame. Thus, the location of the pupil and limbus in one image can be accurately compared with the location of the contact lens edge in the other image.
摘要:
A vision system is provided to determine a positional relationship between a semiconductor wafer on a platen and an element on a processing machine, such as a printing screen, on a remote side of the semiconductor wafer from the platen. A source directs infrared light through an aperture in the platen to illuminate the semiconductor wafer and cast a shadow onto the element adjacent an edge of the semiconductor wafer. A video camera produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. The edge of the semiconductor wafer in the image is well defined by a dark/light transition.
摘要:
The present invention provides methods for enhancing the efficiency of cell electroporation using dielectrophoresis-assisted cell localization and uses thereof in a microfluidic biochip system. Cells are first subject to dielectrophoresis and localized to regions where the electric field intensity is high enough to render cells electroporated. The invention enhances the efficiency of in situ cell electroporation on a traditional microfluidic biochip.
摘要:
A slow release apparatus for slowly releasing a compound in a nasal passage. The apparatus comprises a connection mechanism, two expansion mechanisms, and two release mechanisms; two ends of the connection mechanism are respectively integrally or detachably connected to the two expansion mechanisms that are symmetrically arranged in nasal passages at two sides; and the two release mechanisms are symmetrically arranged, and each release mechanism is correspondingly provided in one of the expansion mechanisms. The slow release apparatus is convenient to carry, and capable of slowly releasing a compound in the nasal passage and synchronously expanding the nasal passage to ensure smooth breathing, while considering functionality, practicability and comfort.