Abstract:
An improved optical flow cell adapted for use in a flow cytometer for differentiating formed bodies (e.g., blood cells) in liquid suspensions. Preferably manufactured by assembling, aligning, and optically joining at least two elements made from transparent material, the improved flow cell has a seamless internal flow channel of preferably non-circular cross-section in a cylindrical first element through which prepared samples can be metered and an independent second element having an external envelope suited to acquisition of optical parameters from formed bodies in such suspensions, the second element being conforming and alignable to the first element so that non-axisymmetric refractive effects on optical characterizing parameters of formed bodies passing through the flow channel in the first element may be minimized before the two elements are optically joined and fixed in working spatial relationship.
Abstract:
An improved optical flow cell adapted for use in a flow cytometer for differentiating formed bodies (e.g., blood cells). Manufactured from a monolithic transparent material, the improved flow cell has an internal flow channel of polygonal transverse cross-section through which prepared samples can be metered and an external envelope suited to acquisition of optical parameters from formed bodies in such samples. Preferably, such flow cell is formed by a glass-drawing process in which a relatively large glass preform having a rectilinear internal channel of a desired polygonal cross- sectional shape is heated and drawn to achieve a desired cross-sectional area of reduced size. Also disclosed are preferred methods for differentiating formed bodies using the flow cell of the invention.
Abstract:
To provide a method for the inexpensive manufacture of a deposition burner with small manufacturing tolerances for use in the synthesis of quartz glass, and wherein moreover, when the deposition burner is used as intended, the risk of contamination of the quartz glass to be produced is low, the invention suggests the following method steps: (a) providing a start cylinder of quartz glass which is mechanically provided with longitudinal bores; (b) elongating the start cylinder with formation of a burner strand, the longitudinal bores being shaped as elongated channels extending in parallel with one another; (c) cutting the burner strand into pieces in the form of cylindrical quartz glass blocks, each being provided with passage lines extending in parallel with a central axis of the quartz glass block; and (d) manufacturing the deposition burner by using a respective one of such quartz glass blocks as burner head which has a proximal end and a distal end, the passage lines serving the supply of process media from the distal to the proximal burner head end.
Abstract:
Systems, methods, apparatus and products relate to drawing and blowing of ultra thin glass substrates, such as flexible display glass sheets, for example, organic light emitting diode (OLED) displays, liquid crystal displays (LCDs), and/or other flexible substrate applications, such as lighting, and/or other technologies, such as electro-wetting (EW), electro-phoretic display applications, etc. A localized heat source centripetally heats a vertical glass pre-form, while a pressurized air source blows the heated glass to expansion. An air bearing may centripetally blow air against the expanding pre-form to limit expansion and prevent contact of the pre-form with the localized heat source. Meanwhile, the pre-form is pulled vertically to draw the heated glass. The pre-form may float in a floatation mechanism to compensate for gravity when the pre-form is pulled upward. The blown and drawn pre-form may be cooled, coated with a polymer layer, and cut into a ribbon by in-line devices as it exits the air bearing. For example, a laser may helicoidally cut a polymer-coated blown and drawn pre-form into a ribbon, which may be rolled for collection.
Abstract:
A method of forming an ordered optic fiber array is provided by forming an array of holes (12) in a glass block (10) based on an enlarged pattern of a desired precision array, heating and drawing the glass block from a first end thereof, and reducing an outside dimension of the glass block and the array of holes to a predetermined size for the precision array. A portion of the alignment block body (18) is separated to form at least one fiber alignment plate (14), and optic fibers (22) are attached. This can be used in a connector arrangement (30) for optic fibers (22) having first and second fiber alignment plates (32, 34) being located on a floating mount. Alignment structures are located on the alignment plate (16) for precise alignment. Another method of assembling an ordered optic fiber array can be used in which optic fibers are positioned with a computer-controlled manipulator and adhered to a substrate.
Abstract:
Bei einem bekannten Verfahren zur Herstellung eines zylinderförmigen Glaskörpers in einem Vertikalziehprozess wird ein Glasrohling in einer Heizzone erweicht und als Glasstrang mit geregelter Ziehgeschwindigkeit mittels eines Abzugs abgezogen, wobei der Abzug eine erste Abzugseinheit mit am Glasstrang abrollenden und um dessen Umfang verteilten Rollkörpern, die von einem Referenz-Rollkörper und mindestens einem Hilfs-Rollkörper gebildet werden, aufweist, wobei die Ziehgeschwindigkeit über die Drehzahl des Referenz-Rollkörpers geregelt wird. Um hiervon ausgehend Oberflächenbeschädigungen des Glasstrangs durch den Abzug zu verringern und Verformungen infolge vorhandener Biegungen des Glasstrangs zu vermeiden, wird erfindungsgemäß vorgeschlagen, dass in Abhängigkeit vom Gewicht des abgezogenen Glasstrangs (5) ein Wert für das Drehmoment des Referenz-Rollkörpers (3) ermittelt wird, und dass der ermittelte Wert als Soll-Drehmoment für die Einstellung des Drehmoments bei dem mindestens einen Hilfs-Rollkörper (4; 7; 8) herangezogen wird.