Carl-zeiss-stiftung

Carl-zeiss-stiftung, Heidenheim/brenz

Zeiss Ikon Ag

Horst Ballmer

Henry Kramer

Rudolf E Grosskopf

Klaus-Peter Koch

Erwin Wiedmann

Berndt Kammleiter

Ulrich Nagele

The invention relates to a method and apparatus for controlling the quantity of emitted light in an optical measuring head. The control of the emitted light quantity of a laser diode mounted in the optical measuring head is dependent upon the stray light characteristics of the workpiece and is achieved by controlling the pulse width of the laser diode. The light pulses are synchronized with the machine clock frequency of the coordinate measuring apparatus on which the measuring head is fixedly mounted such that the center of the pulse coincides always with the counter strobe of the measuring system of the coordinate measuring apparatus.

Method and apparatus for controlling the quantity of emitted light in an

An apparatus for non-contacting information transmission between a data carrier and a data reader includes providing at least two electrodes on the surface of the data carrier which are brought together which at least two electrodes in the data reader to form capacitors to produce at least one common circuit of the data carrier and data reader for information transmission.

Method and apparatus for non-contacting information transmission

The invention is directed to a circuit arrangement for rapid sortation or selection of at least three digital values according to rank. In the circuit arrangement, the input channels are directly interconnected via digital comparators or arithmetic logic units. The outputs of the digital comparators or arithmetic logic units are connected to a gate-logic circuit or a ROM table controlling data selectors for the transfer of selected values or a network of data selectors for the sortation of all input values.

Circuit arrangement for performing rapid sortation or selection

The invention is directed to methods and circuit arrangements for video-rapid determination of the median of an evaluation window. In a first step, the gray values of one column of the evaluation window are transferred in accordance with their relative rank to window line memories; in a second step, selection circuit arrangements select gray values in parallel from all window line memories according to their rank relative to one another. Only these selected gray values are then processed in subsequent steps by processing circuit arrangements.

Method and circuit arrangement for video-rapid determination of the

An electrochromic layer is applied to optical transmitting components, and electric-circuit connection to the layer enables temporary increase and decrease in the absorptance of the component. To increase the absorptance, a well-defined quantity of charge is supplied to the electrochromic layer; and to restore the initial condition, a well-defined quantity of charge is removed from the layer. Preferred fields of use are lenses, particularly eyeglass lenses, filters, and dimmable mirrors.

Method and apparatus for temporarily increasing the absorptance of

A continuous change in color is provided in order to control the absorptance of an electrochromic layer. The quantities of charge to be fed and removed by two sources of constant current are measured with a forward/backward counter. For decoloring processes, smaller amounts of charge are removed from the layer than are supplied to it for corresponding coloring processes. The quantities of charge removal for decoloring processes are, however, slightly greater than the quantities of charge which are theoretically necessary to obtain intermediate values with exactly the same absorptance, thereby assuring against destruction of the layer, even in case of numerous changes between different colorings. Preferred fields of use are lenses, particularly eyeglass lenses, filters and dimmable mirrors, using an applied electrochromic layer whose absorptance is varied.

Continuous charge control for electrochromic layers

In order to regulate the absorptance of an electrochromic layer, the absorptance of the layer is measured optically. The signal derived therefrom is compared with a guide value and fed to a controller which has a dead zone between two hysteresis regions (at switch points), and charges are fed to or removed from the layer as required. Preferred fields of use are lenses, particularly eyeglass lenses, filters and dimmable mirrors to which an electrochromic layer is applied with provision for controlled change of its absorptance.

Optical control circuit for electrochromic layers

In order to control the absorptance of an electrochromic layer, the invention provides a plurality of steps for establishing different levels of coloring action. Quantities of charge are supplied to and removed from the layer, via one or the other of two constant-current sources, timed with clock pulses to a forward/backward counter. For decoloring processes, smaller quantities of charge are removed from the layer than are supplied to it during a corresponding coloring process. The quantities of charge removed for decoloring processes are, however, slightly greater than the quantities of removed charge needed to reach steps having exactly the same absorptance, so that even in the case of numerous changes between the color steps, destruction of the layer is definitely avoided. Preferred fields of use are lenses, particularly eyeglass lenses, filters and dimmable mirrors, each having an applied electrochromic layer whose absorptance is controlled for step-wise change.

Growing community of inventors

Heidenheim, Germany

Horst Ballmer