Abstract: An electro-optical hand-held distance measuring instrument (1) with a housing (2) which can be held in the hand and with an electro-optical distance measurement module (3) with an electric beam source (5) for generating an optical measurement beam (S), a beam receiver (8) for receiving portions of the measurement beam (S) that are backscattered by an object to be measured (MO), and an output device (7) for the determined distance (X). A mechanical distance measuring device (9, 11) is connected to the housing (2).

Abstract: A marking device for marking visual permanent markers on a surface and including a housing (2), a marking unit (19), a motorized drive (36, 18; 24) for displacing the marking unit relative to the housing (2), a detector device (21) for detecting a measurement signal and for generating a position signal upon deviation of the measurement signal from a marking signal, and a control circuit (27) for controlling the drive (36, 18; 24) and for actuating same in response to the position signal for displacing the marking unit (19) relative to a reference housing position into a corrected marking position.

Abstract: An electro-optical hand-held distance measuring instrument (1) with a housing (2) which can be held in the hand and with an electro-optical distance measurement module (3) with an electric beam source (5) for generating an optical measurement beam (S), a beam receiver (8) for receiving portions of the measurement beam (S) that are backscattered by an object to be measured (MO), and an output device (7) for the determined distance (X). A mechanical distance measuring device (9, 11) is connected to the housing (2).

Abstract: A rotational constructional laser including a light source (3, 33) for emitting a laser beam (L) and located in the laser housing, a laser beam motor-driven deflection device (7; 50; 74; 104) located in a housing unit (10; 51; 73; 93; 103) secured to and at least partially projecting beyond the laser housing (2; 32, 72; 92; 102) and having a least one beam hole (52, 53) for the laser beam, a device (37) for tilting a rotational axis of the deflection device a detection device for detecting a return laser beam (R) reflected from a display mark and entering the housing unit through the at least one beam hole, an evaluation and control unit connected with the detection device and controlling operation of the tilting device, and an automatically actuatable device (40; 75; 107; 108; 109) for adjusting an axial position of the deflection device (50; 74; 104) with respect to initial axial position of the deflection device in accordance with the detection data obtained in the detection device.

Abstract: A marking device for marking visual permanent markers on a surface and including a housing (2), a marking unit (19), a motorized drive (36, 18; 24) for displacing the marking unit relative to the housing (2), a detector device (21) for detecting a measurement signal and for generating a position signal upon deviation of the measurement signal from a marking signal, and a control circuit (27) for controlling the drive (36, 18; 24) and for actuating same in response to the position signal for displacing the marking unit (19) relative to a reference housing position into a corrected marking position.

Abstract: A device for centering geodetic instruments over defined ground marks or defined position marks is described, in which a visible light beam is projected onto a ground mark or position mark. In an advantageous additional feature, the light beam of the invention can be used to measure the distance between the sighting line of the geodetic instrument and the sighted ground mark or position mark.