DD287776B5

DD287776B5 - Arrangement for projecting a light mark, preferably with a theodolite

Info

Publication number: DD287776B5
Application number: DD33232789A
Authority: DD
Inventors: Holger Rosenkranz; Peter Navratil
Original assignee: Zeiss Carl Jena Gmbh
Priority date: 1989-09-04
Filing date: 1989-09-04
Publication date: 2000-06-15
Also published as: DD287776A5

Description

eines Theodolitfernrohres ein justierbares optisches System mit vorzugsweise zwei Prismen vorgesehen ist, dessen Austrittsfläche zentrisch zur optischen Achse des Theodolitfemrohres liegt, und dass eines der Prismen eine strukturierte zielmarkenerzeugende Reflexionsfläche enthält oder dass eines der Prismen fest mit einer strukturierten, zielmarkenerzeugenden Platte verbunden ist.a theodolite telescope, an adjustable optical system is provided with preferably two prisms whose exit surface is centered to the optical axis of the Theodolitfemrohres, and that one of the prisms contains a structured target-generating reflection surface or that one of the prisms is firmly connected to a structured, target-generating plate.

Die Erfindung hat den Vorteil, dass ein Markierungsstrahl auf einen Zielpunkt in voller Intensität und ohne entfernungsabhängiges Nachjustieren ausgesendet wird und gleichzeitig eine Beobachtung des Zielpunktes mit dem Theodolitfemrohr ohne verfälschende Reflexe erfolgen kann.The invention has the advantage that a marker beam is emitted to a target point in full intensity and without distance-dependent readjustment and at the same time observation of the target point with the Theodolitfemrohr can be done without distorting reflections.

Ausführungsbeispielembodiment

Die Erfindung wird nachstehend anhand der schematischen Zeichnung näher erläutert. Es zeigtThe invention will be explained in more detail with reference to the schematic drawing. It shows

Fig. 1: eine erfindungsgemäße Anordnung zur Projektierung einer Lichtmarke mit einem Theodolitfernrohr. Fig. 2: zeigt eine Anordnung zur Projektion einer Lichtmarke1 shows an arrangement according to the invention for configuring a light mark with a theodolite telescope. Fig. 2: shows an arrangement for the projection of a light mark

auf einen nicht näher dargestellten Zielpunkt, die mittels eines Trägers 5 auf einem Theodolitfemrohr 4 angeordnet ist. Im Markierungsstrahlengang vor einem Objektiv 13 des Theodolitfemrohres 4 ist dabei ein Reflexionssystem 1 umfassend zwei 90°-Prismen 2 und 3 so angeordnet, dass die Strahlenaustrittsfläche des Prismas 3 ungefähr rechtwinklig und zentrisch zur optischen Achse des Theodolitfemrohres 4 liegt. Dazu ist das Reflexionssystem 1 fest an dem Träger 5 angeordnet, der außerdem am Theodolitfernrohr 4 arretiert ist und die Mittel zur Erzeugung des Markierungsstrahles trägt. Als Markierungsstrahl dient insbesondere ein aufgeweitetes Laserstrahlbündel. Die Erzeugung und Formung des Laserstrahlbündels erfolgt mit an sich bekannten nicht näher dargestellten technischen Mitteln. Die Laserstrahlung wird in einer Laserlichtquelle 6 erzeugt und in einer Optik 7 aufgeweitet. Um eine vorteilhafte Markierung zu erzeugen, enthält eines der Prismen des Reflexionssystems 1 eine strukturierte, zielmarkenerzeugende Reflexionsfläche, oder eines der Prismen des Reflexionssystems 1 ist fest mit einer strukturierten, zielmarkenerzeugenden Platte 8 verbunden. Die Laserlichtquelle 6 kann auch eine Laserdiode oder die Austrittsfläche einer Lichtleitfaser sein, welche eingangsseitig mit einer Laserquelle verbunden ist. Am Reflexionssystem 1 sind keine Mittel zur Justierung des Markierungsstrahles zur Zielachse des Theodolitfernrohres 4 vorgesehen, diese erfolgt mittels der Justierschrauben 9,10,11 und 12 an der Laserlichtquelle 6. Eine Justierung kann aber auch durch Kippung, Drehung oder Verschiebung des Prismas 2 des Reflexionssystems 1 erfolgen. Der Einsatz der Projektionsanordnung an Vermessungsgeräten mit eingebauten, auf die Ziellinie wirkenden Neigungskompensatoren ist eingeschränkt, da der Markierungsstrahl nicht über das stabilisierende Element abgebildet wird.to a target point, not shown, which is arranged by means of a carrier 5 on a Theodolitfemrohr 4. In the marking beam path in front of an objective 13 of the Theodolitfemrohres 4 is a reflection system 1 comprising two 90 ° prisms 2 and 3 arranged so that the radiation exit surface of the prism 3 is approximately at right angles and centric to the optical axis of the Theodolitfemrohres 4. For this purpose, the reflection system 1 is fixedly arranged on the carrier 5, which is also locked to the theodolite telescope 4 and carries the means for generating the marking beam. The marking beam is in particular a widened laser beam. The generation and shaping of the laser beam is done with known per se technical means not shown. The laser radiation is generated in a laser light source 6 and expanded in an optical system 7. In order to produce an advantageous marking, one of the prisms of the reflection system 1 contains a structured, sight-generating reflection surface, or one of the prisms of the reflection system 1 is fixedly connected to a structured, sight-marking plate 8. The laser light source 6 may also be a laser diode or the exit surface of an optical fiber, which is connected on the input side to a laser source. On the reflection system 1, no means for adjusting the marking beam to the target axis of the theodolite telescope 4 are provided, this is done by means of adjusting screws 9,10,11 and 12 at the laser light source 6. An adjustment can also by tilting, rotation or displacement of the prism 2 of the reflection system 1 done. The use of the projection arrangement on surveying equipment with built-in inclination compensators acting on the target line is limited because the marker beam is not imaged over the stabilizing element.

Claims

claims:

1. An arrangement for the projection of a light mark, preferably with a theodolite, provided for projecting the light mark on a target point a target brand projector with a laser light source and in the expanded beam path of the projector, a transparent plate and the projection assembly is detachably mounted on the theodolite telescope, characterized in that in a marking beam path in front of the lens of a theodolite telescope, an adjustable optical system with preferably two prisms is provided, whose exit surface is centric to the optical axis of the theodolite telescope, and that one of the prisms contains a structured, target-generating reflection surface or that one of the prisms fixed with a structured, targeting plate is connected.

2. Arrangement for the projection of a light mark according to claim 1, characterized in that the target mark projector is not integrated into the optical system of the theodolite.

For this 1 page drawing

Field of application of the invention

The invention relates to an arrangement for the projection of a light mark on a target point, preferably with a theodolite, being provided for projecting the light mark on the target point, a laser light source and in the expanded beam path of the projector, a transparent plate and the projection assembly is detachably mounted on the theodolite telescope. This arrangement is particularly applicable for spot marking in industrial surveying systems and laser stakeout in mining and construction.

Characteristic of the known state of the art

There are a variety of technical solutions known to use the observation of the measuring device for collimation of a Zielmarkierungsstrahles. The marker beam must be coupled between the lens and eyepiece or behind the eyepiece in the observation beam path, by hinged or fixed reflective optical components. This has the disadvantage that during the transmission of the marker beam no observation with the telescope is possible or that in many cases a darkened, false-heightened field of view is present due to the wavelength dependence of the optical elements. Furthermore, when the marking beam is coupled behind the reticule of an observation tube, the line figure in the middle must contain an opening in order to avoid diffractions or disturbing reflections. DE 3 145 823 A1 discloses a method and device for point determination by forward cutting with the aid of at least two angle measuring devices mounted at a predetermined distance, in which the light source is a laser transmitter on the femoral tube of the angle measuring device and the marking beam is formed in a separate collimator optics , Whereby the presence of an eccentricity between the light source and the target axis of the observation telescope, the inclination of the optical axis of the target mark projector with respect to the optical axis of the observation Femrohres must be readjusted point-wise removal-dependent during the measurement.

Object of the invention

The invention is intended to eliminate the aforementioned disadvantages of the prior art and to obtain an accurate target detection without constant readjustment.

Explanation of the essence of the invention

The invention has for its object to make an arrangement for the projection of a light mark, preferably with a theodolite so that a target brand projector is not integrated into the optical system of the geodetic device, so in addition to the emission of a marker beam through the target brand projector at the same time an observation of the target point the observation telescope of the theodolite can be made without the observation is made difficult by a fake, darkened field of view, and that a constant control of the Justierstandes is obtained during a measurement, regardless of the distance. According to the invention, this object is preferably achieved with a theodolite and a target mark projector detachably mounted on the theodolite telescope, which comprises a laser light source and a collimator optics in the expanded beam path, in that in a marking beam path in front of the objective