Abstract: A device for measuring the distances (d) to far-off objects (8) and close objects by emitting modulated laser beams (1) that are reflected on the objects. The device includes an objective (2), structure(s) (12, 36, 38, 39, 40) for selecting beams, and a receiver (7). Beams are bundled by the objective, the beams not only containing the laser beams (3) reflected on the objects but also background beams (28). The beams in an associated cross-sectional region (34, 37) of the bundle are selected from a bundle of beams by the selection structure(s) (12, 36, 38, 39, 40). The cross-sectional region includes a first section (5) and at least one second section (6), laser beams (3) reflected by a far-off object being associated with the first section (5), and laser beams (3) reflected by a close object (8) being associated with the at least second section (6).

Abstract: A device for measuring the distances (d) to far-off objects (8) and close objects by emitting modulated laser beams (1) that are reflected on the objects. The device includes an objective (2), structure(s) (12, 36, 38, 39, 40) for selecting beams, and a receiver (7). Beams are bundled by the objective, the beams not only containing the laser beams (3) reflected on the objects but also background beams (28). The beams in an associated cross-sectional region (34, 37) of the bundle are selected from a bundle of beams by the selection structure(s) (12, 36, 38, 39, 40). The cross-sectional region includes a first section (5) and at least one second section (6), laser beams (3) reflected by a far-off object being associated with the first section (5), and laser beams (3) reflected by a close object (8) being associated with the at least second section (6).

Abstract: An optical component (10a) for at least two pencils (4, 5) of rays has at least one one-piece element (1, 2) of inorganic optical material and at least two segments (6, 7) which are coordinated with the pencils of rays and of which the first segment (6) is substantially surrounded by the at least one second segment (7). According to the invention, a depression (8a) is provided between the first and the at least one second segment (6 and 7), respectively. This is formed in such a way that the first segment (6) is substantially optically shielded from the at least one second segment (7) and is held by means of at least one material bridge from the second segment with a stable attitude thereto.

Abstract: In geodetic measuring systems and measuring devices (14) there exists a need to find and detect, rapidly and automatically, marker points to be measured that are provided with a marker (retro reflector) (2a). For the rapid detection, identification and determination of the horizontal angles of such a marker, even at greater distances, electromagnetic radiation in the form of a vertical fan (17) is transmitted by a transmitter unit (1) whose radiation is received, after reflection from the marker, by a receiving unit with a view field in the form of a vertical fan. By analyzing the signal strength and the apparent object size, a plausibility test and a reliable suppression of foreign or interference markers can be achieved. Such a marker searching device is marked by a selective analysis of specific characteristics of a marker detected. On the basis of the plausibility test, a rapid, certain and robust location of markers is possible.

Abstract: In geodetic measuring systems and measuring devices (14) there exists a need to find and detect, rapidly and automatically, marker points to be measured that are provided with a marker (retro reflector) (2a). For the rapid detection, identification and determination of the horizontal angles of such a marker, even at greater distances, electromagnetic radiation in the form of a vertical fan (17) is transmitted by a transmitter unit (1) whose radiation is received, after reflection from the marker, by a receiving unit with a view field in the form of a vertical fan. By analyzing the signal strength and the apparent object size, a plausibility test and a reliable suppression of foreign or interference markers can be achieved. Such a marker searching device is marked by a selective analysis of specific characteristics of a marker detected. On the basis of the plausibility test, a rapid, certain and robust location of markers is possible.