公开(公告)号：US3529527A

公开(公告)日：1970-09-22

申请号：US3529527D

申请日：1967-11-29

Applicant: LEITZ ERNST GMBH

Inventor： LEITZ LUDWIG

IPC: G03B13/20 ,  G03B3/00

CPC classification number: G03B13/20

公开(公告)号：US3628434A

公开(公告)日：1971-12-21

申请号：US3628434D

申请日：1969-05-02

Applicant: LEITZ ERNST GMBH

Inventor： LEITZ LUDWIG ,  FRANKE WILLY

IPC: G03B9/42 ,  G03B9/36

CPC classification number: G03B9/42

Abstract: The leading and the lagging shutter blade of a focal-plane shutter are both provided with a racklike row of teeth at the outer edges of each blade and extending in parallel to the direction of shutter-blade movement. The blades move in the direction of the short side of the image aperture in the imageaperture plate, and toothed segments are arranged in the camera between the cone of light, travelling from the camera lens to the film through the image aperture and the adjacent partition walls of the camera housing; the segments being permanently in mesh with the racks of the blades and being used either for driving the shutter blades after shutter release and for returning them to their starting position or only for the latter purpose.

公开(公告)号：US3529528A

公开(公告)日：1970-09-22

申请号：US3529528D

申请日：1967-12-04

Applicant: LEITZ ERNST GMBH

Inventor： LEITZ LUDWIG

IPC: G03B13/20 ,  G03B3/00

CPC classification number: G03B13/20

公开(公告)号：US3899251A

公开(公告)日：1975-08-12

申请号：US44580874

申请日：1974-02-25

Applicant: LEITZ ERNST GMBH

Inventor： FRENK HELMUTH ,  LEITZ LUDWIG

IPC: G01C3/06 ,  G01B11/00 ,  G01C3/00 ,  G01C21/00 ,  G01C21/04 ,  G01C21/20 ,  G01C23/00 ,  G01P3/36 ,  G01C3/08

CPC classification number: G01P3/36

Abstract: In an apparatus for measuring the relative distance and optionally the relative velocity of an object with respect to a reference system, the improvement comprising, using two optical correlator systems with differing distances from the object, forming an auxiliary signal by mixing the electric output signals of the correlator systems, wherein the auxiliary signal has the difference frequency of these output signals; and then counting the number of signal cycles of one of the correlator output signals obtained during the duration of a cycle of the auxiliary signal and indicating the number of signal cycles as a value proportional to the distance.

公开(公告)号：US3591841A

公开(公告)日：1971-07-06

申请号：US3591841D

申请日：1969-01-24

Applicant: LEITZ ERNST GMBH

Inventor： HEITMANN KNUT ,  SCHNEIDER ECKART ,  LEITZ LUDWIG

IPC: G01D5/347 ,  H03M1/00 ,  G01D5/34

CPC classification number: H03M1/00 ,  G01D5/34792 ,  H03M1/1009

Abstract: An apparatus for measuring the linear or angular movement of an object being provided with two graduation carriers movable relative to one another; one of the carriers being connectable to the object to be measured, the other one being connectable to a reference body. The apparatus further comprises means for illuminating one of the graduation carriers, means for projecting an image of the illuminated carrier on the other carrier, photoelectric means for sensing the carriers, and electronic evaluation means for processing the signals from the photoelectric means so as to provide output signals usable for digital indication or for control purposes. The first of the two graduation carriers having linear graduations comprising transparent or reflective striplike marks, the ratio of the graduation interval to the mark width corresponding, in the direction of the relative movement, to the desired number of interval fractions per graduation interval, and the second graduation carrier having one or a plurality of sensing fields the number of which is less than the desired number of interval fractions and which together form a combination of image patterns, each of these sensing fields having a plurality of striplike, light-permeable and light-impermeable portions of its surface area which are parallel with the marks of the first graduation carrier and which are unequal inter se in such a way that, upon relative movement of the graduation carriers over a distance corresponding to a graduation interval, different combinations of image patterns are produced which correspond in number to the desired number of interval fractions per graduation interval.

公开(公告)号：US3446126A

公开(公告)日：1969-05-27

申请号：US3446126D

申请日：1965-04-07

Applicant: LEITZ ERNST GMBH

Inventor： LEITZ LUDWIG ,  BROSCHKE HEINRICH

IPC: G03B7/20 ,  G03B17/56 ,  G03B19/12 ,  G01J1/04

CPC classification number: G03B19/12 ,  G03B7/20 ,  G03B17/565