Abstract: An optical monitoring apparatus has a light transmitter for the transmission of at least two light beams offset substantially parallel to one another into a protected zone as well as a light receiver for the for the reception of the transmitted light beams and for the outputting of corresponding received signals. The light receiver has at least one photo-sensitive element having an elongate light-sensitive region whose elongate direction is aligned parallel to the arrangement of the light beams perpendicular to the direction of transmission such that all radiated light beams can be completely detected by the light sensitive region. A control circuit is provided for the distinguishing of the light beams which causes the light transmitter to make a transmission of the light beams offset in time.

Abstract: A method of controlling at least one safety-specific function of a machine. The method includes monitoring a monitoring region with at least one location-resolving and time-resolving sensor, where the monitoring region includes a safety boundary which separates off a danger region and defines a safe distance from a danger zone of the machine. The method also includes detecting at least one of a position, a movement direction and a movement speed of an object. The method also includes establishing a position of the safety boundary in a variable manner depending on the at least one of a detected position, movement direction and movement speed of the object. The method also includes triggering the safety-specific function of the machine when entry into the danger region by the object is detected. An apparatus corresponding to the method is also described.

Abstract: The invention relates to a method of monitoring a monitored zone by means of an optoelectronic sensor, wherein transmitted light is transmitted in accordance with a structured light pattern in the direction of the monitored zone and is received from the monitored zone, the received light is converted into received signals and the received signals are evaluated with respect to the presence of an object, or with respect to a movement of an object, in the monitored zone. The transmitted light is transmitted and/or received in accordance with at least two different light patterns. The invention further relates to an optoelectronic sensor.

Abstract: The invention relates to a method and to a sensor for the securing of a hazardous zone of a moving tool having a point of attack. A monitored zone with a boundary surface is monitored whose cross-section extends along an arc of a circle or beyond it, wherein the center of the arc of a circle is arranged spaced apart from the point of attack of the tool in the direction of movement of the tool, and wherein the arc of a circle has a radius which is at least so large that the boundary surface of the monitored region extends—at least on the operator side—up to the point of attack of the tool or radially beyond it.

Abstract: The invention relates to a cell for an ophthalmic lens, for testing the latter with an optical inspection system, said cell comprising a hollow space (11, 31) which is filled with a liquid and has an axis (12, 32) coinciding, in the test position, with the optical axis of an inspection system and, in the test position of the cell, is delimited from above by a viewing glass (13, 33) for the optical test and has, underneath the viewing glass, a test trough (14, 34) for the ophthalmic lens. Between viewing glass (13, 33) and test trough (14, 34), at least one insertion channel (15, 35) opens into the hollow space (11, 31), the ophthalmic lens being able to be inserted into the hollow space (11, 31) through the outer insertion opening (16, 36) of said insertion channel (15, 35).

Abstract: The invention relates to a method of controlling a light grid with a monitored zone for the securing of a hazardous zone pre-determined by a tool movement which is activated with the tool movement. A closed region of the monitored zone is activated as an active field. This active field is moved within the monitored zone such that the hazardous zone is initially only partly secured during the tool movement.

Abstract: The invention enables more objective defect evaluation of ophthalmic lenses, especially contact lenses, to take place through the combination of the schlieren method with the transmitted light method, with the result that the advantages of these two different systems are combined. The schlieren method is in a position to illustrate the edge of a contact lens and its ruptures, in high contrast, for the CCD camera. Likewise, tears and surface defects can be made visible. Using the transmitted light method, the bubbles may be suitably prepared for the camera.