Abstract:
A digital optical comparator has a holder for a part under study. A light source illuminates the part and casts an image of the part onto a camera, which is provided with a lens. The image captured by the camera is displayed on a screen, and a drawing of the part is overlaid on the image of the part. Thus, defects in manufacturing can be easily and readily identified. In addition, a determination of whether the part is manufactured within tolerances can also be visually determined.
Abstract:
An optical assembly comprises an optical device (103); an enclosure (101) for containing the optical device (103), the enclosure (101) including a transparent section (107) to allow passage of a light beam (104) to or from the optical device (103); and means for measuring the attenuation of a test light beam (212) through the transparent section(107). Preferably, the optical assembly also comprises means for compensating for the measured amount of attenuation by adjusting a measurement or a characteristic of the optical device (103) or a related optical device to compensate for the measured amount of attenuation.
Abstract:
Die Erfindung betrifft Verfahren und Vorrichtung zur Messung der Eigenspannungen in schmalen Metallbändern. Es werden der Drallwinkel α, die Rollkrümmung RK und die Säbelförmigkeit SF an Probestreifen (8) gemessen, welche aus dem Band (7) entnommen werden. Hierzu wird der Probestreifen (8) in einem Probenhalter (2) eingespannt. Trifft ein Lichtbündel (5) auf den Probestreifen (8), so wirft der Probestreifen (8) einen Probenschatten (10) bzw. reflektiert an seiner blanken Oberfläche das Lichtbündel (5) auf einen Bildschirm (4). Die Auslenkungen A₁, A₂, A₃, welche der Probenschatten (10) bzw. das reflektierte Lichtbündel (11) in definiertem Abstand H von der Einspannstelle (9) des Probestreifens (8) von der optischen Achse (6) des Lichtbündels (5) erfahren, sind ein Maß für die genannten Größen.
Abstract:
An optical measuring instrumentwherein a turn-table for mounting a work is provided on a moving stage to automatically measure the contour and shape of the work, and the moving stage and the turn-table are controlled while being interlocked to the operation of an edge sensor for measuring the contour.
Abstract:
A digital optical comparator has a holder for a part under study. A light source illuminates the part and casts an image of the part onto a camera, which is provided with a lens. The image captured by the camera is displayed on a screen, and a drawing of the part is overlaid on the image of the part. Thus, defects in manufacturing can be easily and readily identified. In addition, a determination of whether the part is manufactured within tolerances can also be visually determined.
Abstract:
The spherical aberration of an optical beam is determined by focusing the beam, and dividing its cross section in at least two concentric zones (50, 51). The sub-beams passing through the zones are focused each on a focus-detection system (53, 52). The distance between the positions of the two foci is a measure for the spherical aberration present in the beam.
Abstract:
The present invention relates to a metrology system (100) for dimensional measurement of an object (200) comprising a light-projection device (110), LPD, configured to project an image (112) onto the object (200); a position-measurement device (120), PMD, having a measurement volume, configured to determine the position and/or the orientation of the LPD (110) disposed within the measurement volume; a dimensional acquisition device (140), DAD, that is an optical non-contact probe rigidly attached to the LPD configured to acquire dimensional data of the object (200);and an adjustment unit (130) configured to adjust the projected image (112) to have an essentially static appearance in relation to the object (200), which adjustment is responsive to movement of the LPD (110) detected by the PMD (120); wherein the image projected by the LPD (110) conveys feedback information to the user responsive to dimensional acquisition by the DAD (140).