Ernst Leitz Wetzlar Gmbh

Rainer Fritsche

Klaus-Dieter Schaefer

Hans-Dieter Jacoby

Erich Schuster

Helmut Ringelhan

Apparatus for sensing test values at test samples which uses an elastically supported mechanical sensor (3) moving relative to test samples (4) and at least one test value transmitter (11) with counter (9) detecting the relative motion between the sensor (3) and the test samples. At the instant of impact between sensor (3) and the test samples (4), a signal is generated which is used to store the test value present at the test value transmitter (11) at the instant of impact between the sensor (3) and the test samples (4) into a memory (13a,13b). The sensor consists of one part (2') which is fixed to the housing and other part (2') which is movable with respect to the fixed one. An oscillation or acceleration pickup (10) is mounted externally to the moving part (3) and generates the signal required to store the test value. A circuit (14) is provided to the oscillation or acceleration pickup (10) to distinguish between actual sensing signals and spurious ones. This circuit (14) selects any spurious signals from the sensed (test) signal and controls the data flow between the memory (13a,13b) and a subsequent computer (16) for analyzing the test signals.

Apparatus for sensing test values at test samples

A photographic camera with an electrical circuit for generating an electric signal proportional to the relative motion between the object sighted and the camera. The camera has a control circuit which receives the generated signal and provides an output signal which is fed to a display and/or control device. An indicator is provided to the user of the camera for indicating whether the exposure time is set too long for the relative motion present between the object and the camera. Automatic control of the camera is also provided. Individual photosensor elements are arranged in two alternately connected groups within the electrical circuit. The individual photosensor elements may also be arranged in two substantially perpendicular directions to provide a relative motion signal corresponding to two dimensional movement between the object to the photographed and the camera.

Photographic camera

An automatic focusing device is disclosed which focuses an object onto an image plane. The device comprises an optical correlator which includes: a first focusing member, an optical fiber means, a grating structure and photoelectric receiving means. The device further comprises control means, motor means, and means for adjusting the first focusing means. A probe is disclosed which comprises an elongated tubular member; a first focusing means; an optical fiber bundle; a grating structure; photoelectric receiving means; means for focusing light received from the grating structure; and display means for electrically displaying the position of the probe. Also, a method of determining optimum focus position of a probe is disclosed which comprises passing the light image of an object through a bundle of optical fibers in the probe to form an image of the object. Light leaving the bundle is directed onto a grating having a grating constant such that the spatial frequency spectra of the fibers and of the grating do not overlap. The optical correlation between the object image and the structure are then determined and the probe is adjusted based upon electrical signals derived from the optical correlation.

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Wetzlar, Germany

Rainer Fritsche