DE2924478A1 - LASER RANGE MEASURING DEVICE - Google Patents

Description

GLAWE ₁ DELFS ₁ MOLL & PARTNER

2S24478

PATENT LAWYERS

DR.-ING. RICHARD QLAWE, MONKS DIPL-INQ. KLAUS DELFS, HAMBURG DIPL.-PHYS. DR. WALTER MOLL, MÖNCHEN * DIPL.-CHEM. DR. ULRICH MENGDEHL, HAMBURG

APPROVED REPRESENTATIVES AT EUROPEAN PATENT OFFICE

• ZUGL. OFF. BEST. U. VEREID. INTERPRETER

Aktiebolaget Bofors S-69O 20 BOPORS / Sweden Laser range finder

8000 MÖNCHEN 26 POST BOX 37 LIEBHERRSTR. 20th TEL. (089) 22 65 48 TELEX 52 25 05 spec

MUNICH A 08

2000 HAMBURG POST BOX 2570 ROTHENBAUM-CHAUSSEE TEL. (040) 41020 TELEX 21 29 21 spec

description

The present invention relates to a laser range finder with a directional telescope and a transmitter and receiver part, supplemented by electronics and a Optical system suitable for measuring the distance of an object observed through the telescopic sight.

It is already known to use laser distance measuring devices for measuring the distance to an object, the The transit time of a laser beam emitted by the distance measuring device and reflected by the object is determined.

909883/0658

BANK: DRESDNER BANK, HAMBURG, 4 030 448 (BLZ 200800 00) ■ POST CHECK: HAMBURG 147607-200 ■ TELEGRAM ₁ SPECHTZIEs

Laser rangefinders are mainly used for militari These are also used when the distance to a target is to be determined. To align the Distance measuring device to a distant target facilitate, it is already known the distance measuring device to be provided with an aiming device, for example a directional telescope, with the aid of which the operator the distance measuring device can aim at the target. Up to now, Richtfernrobrund receivers have been used in the Hegel of the distance measuring device built together as a unit, so that a common lens and, if available, prisms for both aligning and receiving the laser pulse could be used. A diohroic (partially transparent) mirror was used to capture the radiation to reflect within the visible wavelength range to the eyepiece of the directional telescope while the laser radiation is let through to the detector of the receiver part. A Example of such a laser removal tool is shown by the Swedish PS 362 I46 known.

However, these previously known devices have a number of Disadvantages:

1. The distance measuring devices are very expensive, at least at present.

2. Certain military equipment contains complicated ferro tubes and For tactical purposes, these are only partially equipped with rangefinders.

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3. On the electronics and the very compiled part of the Laser rangefinder seas are there compared to the strict optical parts often fail. Seehalf is ee it is desirable that a defective part be replaced without disrupting the entire equipment can.

4. Because it can be expected that the lasers of the future with regard to their dimensions, weight and power requirements are comparatively reduced, it is advantageous if the device is later equipped with the latest laser units can be provided without all together an extensive replacement process is included.

en

From the above observation / it can be seen that there are obvious reasons for creating a laser distance measuring device which is divided so that it forms two separate mechanical parts, one part containing one designed according to its purpose Telescope, which is equipped with a dichroic (partially transparent) Mirror and a receiver partition plate is provided and one part contains a laser unit with associated electronics with transmitter and receiver part with detector.

The object of the present invention is therefore to provide a laser distance measuring device to create in which the above-described Naohteile by one in two such separate mechanical parts

divided device are eliminated. Such an apparatus comprises those contained in the following claims Features on.

The invention is based on the following Figures 1 and which is a useful embodiment of the invention show in schematic representation.

That in the pig. 1 shown laser distance measuring device has a telescope 1, which for example at a marching compass or military theodolite Type of telescope. The telescope is provided with an objective part 2, which shows the incident radiation, βο the wavelength visible within the range lying radiation as well as the laser radiation, to a prism arrangement in the rear part of the telescope directs. Furthermore, the telescope has an eyepiece 4 with a Alignment mark 5, which facilitates the alignment of the device on a target to be attacked for the shooter.

The prism assembly consists of an erecting prism and a reflective surface on which a prism is cemented, which with a dichroic. (partial passages igen) mirror sight 7 is provided. The diehroitic The mirror layer has such properties that it

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Rays la visible area stm the eyepiece 4 of the telescope 1 Reflects while laser beams to an Eapfänger-Biaphraga opening 8, after which they leave the telescope through a window 9 in the telescope wall.

In addition, sub telescope 1 has the laser distance measuring device a laser unit 10 old a transmitter part, which in a conventional manner a flash lamp, a laser rod 11, a transmitter optics 12 etc. which are required for the transmission of the laser beam. Also contains the laser unit the electronics required for the rangefinder and an in display 15 (display device) to the shooter to be able to indicate the measured distance. However, these parts have a conventional design and are therefore not in the Described in detail.

The effective transmitter part is surrounded by a housing 14, the lower tubular part 15 of which is arranged so that that it can be mounted on the tube 16 of the telescope lens and is attached so that the optical axis of the laser transmitter parallel to the optical axis of the telescope. If the Units are exchanged, the alignment practically remains the same. Furthermore, the housing of the laser transmitter is provided in the rear area and on its bottom with a window 17, which in the fixed position directly is above the window 9 in the telescope wall.

809883/0658

2324478

In addition to the transmitter part, the laser unit also a detector 18 through the windows 9 and 17 receives the laser radiation reflected by the target and converts it into an electrical signal in a known way.

It can be advantageous for the connection of telescope and laser be to image the receiver diaphragm opening 8 through a lens arranged in the telescope at infinity and then image the opening in the detector by means of a lens arranged in the laser unit.

The gate part of the device described is obvious. The effective telescope can be obtained immediately and the laser unit after a few years, if it is cheaper, has become smaller or lighter. If the laser unit is defective, only one lock has to be opened and the laser unit can be replaced by another.

In the embodiment shown in FIGS a telescope, which belongs to a marching compass, was taken as an example. If such an instrument with a Rangefinder, it can be used as an observation and Heßfernrohr can be used.

909883/0658

In cases where the telescope is used for shooting without a laser rangefinder, it can be used with a Be provided with Rioht scale. Then a facility should which converts the distance into the attachment angle and, if possible, into the goal stop angle.

The laser unit shown in FIGS. 1 and 2 is provided with a display 13 (Sarstelleinriohtung). Instead of this The sight telescope can also be provided with a display device, the device then having a connection to the Transmission of the signals from the electronics of the laser unit to the display device must be provided.

The invention is not limited to the embodiment given as an example limited, but can within.des, through which The following patent claims can be modified in the given range.

909883/0658

Claims (7)

Claims 1. / Laser rangefinder with a directional telescope and a transmitter and receiver part, supplemented by electronics and an optical system, for the purpose of removing one through the directional telescope observed object, characterized in that the directional telescope (1) with the remaining part of the instrument and the laser unit (1O) respectively form their own mechanically closed unit and that the two units can be connected to one another in such a way that that the alignment is practically retained when changing the units. 909883/0658 BANK: DRESDNER BANK, HAMBURG, 4 030 448 (BLZ 200800 00) ■ POST CHECK: HAMBURG 147607-200 · TELEGRAM: SPECHTZIES 2 ^ 4478 2. Device naoh Anspruoh 1, daduroh gekenneeiohn β t that the directional telescope (1) has a partially transparent mirror (7) for separating the laser radiation from the radiation incident through the objective (2) of the telescope and a receiver diaphragm (δ) for the laser radiation. 3 «device according to claim 2, characterized in that that the partially dual mirror (7) consists of a partially dual mirror Mirror layer (7) on a prism (6), which is part of a prism arrangement in the rear part of the telescope is. 4 «device according to claim 1, characterized that the laser unit (1O) has a tubular part (15) »which is mounted on the tube (16) of the femrohobjectives and in the Terbindungsstteilung can be attached, has. 5 * device according to claim 4 »characterized that the housing of the laser unit with a window (17) ▼ can be seen which is in the connection division directly above of the corresponding window (9) in the housing of the directional telescope, so that the incident through the lens (2) of the directional telescope Laser radiation from the directional telescope can pass through the detector (18) located in the rear part of the laser unit. 909883/0658 6. Apparatus according to claim 1, characterized in that that the laser unit has a display device (13) to communicate the measured distance to the operator. 7. Apparatus according to claim 1, characterized e t that the directional telescope has a display device to transmit the measured distance to the operator and for transmitting signals from the laser unit to the display device Connecting elements are provided. 909883 / Q.6 £ 8