DE8702309U1 - Rifle scope - Google Patents

Description

The innovation concerns a riflescope of the mono-objective, monocular type with a reticle fixed in an intermediate image plane in a reticle holder with an illumination gap, which has depressions in the form of a reticle figure, and whose housing has a light inlet opening at the location of the reticle for illuminating the reticle using an optionally slide-on light.

Rifle scopes, which are used to help detect a target and to align the device equipped with the rifle scope to this target, have a line figure in the beam path of their optical system, which is also called a reticle and which is generally applied to a reticle.

However, this line image is visible at dusk and other

poor visibility conditions, or only very difficult to see. In order to still enable perfect aiming, the line figure is illuminated in such visibility conditions. For this purpose, a slide-on reticle light is usually attached to the housing of the riflescope. This illuminates the reticle through a light inlet opening in the housing, so that the viewer sees a luminous line image when looking through the riflescope, the brightness of which can be adjusted using the reticle light.

GB-PS 21 59 255 discloses a riflescope which couples the light from a light source into the optical system using a lens attached to a prism body. This process is very complex and is not suitable for high-performance riflescopes when visibility is poor, as there is a relatively high reduction in the light intensity and thus in the usable contrast.

In DE-PS 31 37 892, a sighting device with

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a plate projects a line image into the optical system. Since the structure is very susceptible to vibrations, it cannot be used with rifle scopes, which are usually subject to rough handling.

In contrast, in CH-PS 48 59 99, a line marking on a rifle scope is etched into a reticle which is adjustable in height and width. The light is coupled in through an opening at the side and causes the etched line marking to light up.

The aim of the innovation is to design a riflescope according to the generic term of claim 1 in such a way that the illumination of the line mark is possible without a reduction in contrast in the observation beam path due to scattered light and no light emission can be detected from the object.

This object is achieved according to the characterizing feature of claim 1 in that a baffle tube is arranged between the light inlet opening of the housing and the reticle, which has a light exit opening, the cross section of which is at no point larger than the cross section of the illumination gap of the reticle holder.

This innovative design prevents the contrast reductions that occur with riflescopes based on the state of the art and thus represents a significant improvement for the use of a riflescope at dusk and in poor visibility. The geometry of the aperture tube advantageously has an almost rectangular cross-section on the side facing the reticle. This design produces a cross-section that is adapted to the geometry of the reticle.

The outer surface of the visor tube is designed to reduce reflections, which helps to minimize the amount of stray light inside the riflescope.

The manufacture of the diffuser tube as an injection-molded part allows for cost-effective production with high mold quality. The design of the diffuser tube as a socket tube has a very advantageous effect during assembly, whereby the diffuser tube is clamped directly into place by the guide rail of the reticle lamp. This ensures that the diffuser tube always sits absolutely securely, even when handled very roughly.

Depending on the reticle lamp used, the aperture of the baffle tube can be adapted to the geometry of this lamp. It is also conceivable to accommodate the collecting lens inside the upper part of the baffle tube.

The innovation is explained in more detail below using an example of implementation with reference to the attached schematic drawings. They show:

Fig. 1 the construction of a baffle tube; Fig. 2 the optical structure of a rifle scope;

Fig. 3 is a partial view of the riflescope according to Figure 2 in side view;

Fig. 4 is a front view of the rifle scope shown in Fig. 3.

The cover pipe (11) shown in Figures 1a and 1b is designed as a sleeve pipe. The sleeve has a circular light entry opening (1) and a greater wall thickness at the bead (2) of the light entry opening (1), among other things to obtain a safe, resilient support surface (3). The sleeve with a circular cross-section turns into a pipe with an almost rectangular cross-section at the light exit opening (4). By changing the pipe geometry, a second, two-part surface (7) is created on both sides of the pipe with an almost rectangular cross-section. The sleeve depth (5) of the cover pipe is designed to provide lateral stability.

The tube length (6) is adapted to the spatial conditions inside the target tube.

Figure ?. shows the optical structure of the riflescope with aperture tube (11). The objective lens (19) with the optical axis (12) is located in the housing (21). To illustrate the optical conditions inside the riflescope, edge rays (S) and central rays (26) are drawn in. In the first intermediate image plane (9)/here called the line image plane/ is the reticle (10)/in which a line image (27) is etched/which represents the target mark. The reticle (10) is inserted into a mount (30) and connected to it at three fastening points ( 28). The part of the mount (30) facing the aperture tube (11) is designed in such a way that it encloses the opening of the aperture tube (11) to the front and rear through a recess (32) in the mount (30). This recess (32) in the mount (30) is created by a recess for the aperture tube (11) in the mount (30) of the reticle (10). The recess (32) in the mount (30) must be sufficiently far away from the aperture tube (11) so as not to impede the freedom of movement of the reticle (10). This reticle (10) is followed in the beam path by an inversion system (16) with two achromats. Behind the second intermediate image plane (15) is the eyepiece (14), which consists of a field lens and an eye lens. The observer sees along the viewing axis (13) into the telescopic sight. A reticle lamp (17) not shown here can be pushed onto a guide rail (23) connected to the housing (21) of the telescopic sight with a cylindrical lens (33) integrated into the light inlet opening (18) to illuminate the line image (27) at dusk and in poor visibility. The light of the reticle lamp (17), which is limited to a slit-shaped cross section by the cylindrical lens (33) in the light inlet opening (18), falls through the baffle tube (11) onto the circumference of the reticle (10). The light exit opening (4) of the baffle tube (11) is slit-shaped, as shown in Figure 1a, whereby the cross section of the area of the light exit opening (4) is not larger at any point.

1 is larger than the cross-section of the illumination gap (31) of the holder (30) of the reticle (10). The light exit opening (4) is not directly on the circumference of the reticle (10), since it requires a certain freedom of movement p by means of the knob (20) for the distance drive and the knob (22) for the lateral drive. The light emerging from the reticle lamp (17) passes through the baffle tube (11) onto the roughened

Surface of the outer diameter of the reticle (10). This roughening leads to a homogeneous distribution of the incoming light and ensures that both the horizontal and vertical lines of the line pattern (27) are illuminated evenly. The line pattern (27) is etched into the reticle (10) and ensures that the light is diffracted at its edges and thus becomes visible to the observer. The structural design of the frame (30) of the reticle (10) with a shielding effect for scattered light in and against the direction of view ensures that the light from the reticle lamp (17) is not visible to the front and that the observer does not experience any deterioration in the image quality due to a portion of scattered light.

Figure 3 shows a partial view of the telescopic sight according to Figure 2 in the side view of the installed baffle tube (11). Its lateral stabilization can be seen very clearly over the entire length of the socket depth (5). The baffle tube (11) rests with the ;| < / bead (2) on the light entry opening (1) on the housing (21) of the telescopic sight. Due to the precise shape of the baffle tube (11) and its innovative shape, the

i Housing (21) of the rifle scope an alignment of the aperture tube (11) into its final position in which it is glued.

The knob (20) of the riflescope for the distance drive is used to adjust the sighting distance and the sighting _angle by moving the reticle (10) accordingly, " * the knob (22) for the lateral drive is used to correct the

Lateral deviation. This guide rail (23) is fixed to the housing (21) of the rifle scope by means of the two screws (25).

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attached.

Figure 4 shows a section through the riflescope according to figure from the front with a front view of the built-in diffuser tube (11) below the guide rail (23) of the reticle lamp (17). Here too, it can be seen very clearly how the diffuser tube (11) ensures that the light from the reticle lamp (17) is limited to the reticle (10) with the etched line image (27). The reticle (10) is located in a holder (30) which has an illumination gap (31) on the side facing the sieve tube (TD). The sieve tube (11) is limited on the sides by the recess (32) of the holder (30). The reticle (10) is attached to the holder (30) at three attachment points (2S) with a putty. A black limiting ring (29) on the reticle (10) limits the transmission range of the observation beam path. The light from the reticle lamp (17) is scattered at the reticle image (27) in the direction of the eyepiece (14), so that the reticle image (27) itself appears to glow for the observer.

On the housing (21) of the rifle scope, in addition to the knob (20) for the distance drive and the knob (22) for the lateral drive, the guide bar (24) for the holder and attachment to a rifle can be seen.

Claims (6)

Protection claims: 87005H G 1. A riflescope of the mono-objective, monocular type with a reticle mounted in an intermediate image plane in a reticle holder with an illumination gap, which reticle has depressions in the form of a line figure, and whose housing has a light inlet opening at the location of the reticle for illuminating the reticle by means of an optionally slide-on light, characterized in that a baffle tube (11) is arranged between the light inlet opening (13) of the housing (21) and the reticle (10), which has a light exit opening (4) whose cross-section C. cross-section is not larger at any point than the cross-section of the illumination gap of the reticle holder. 2. Telescopic sight according to claim 1, characterized in that the light exit opening (4) of the baffle tube (11) has an approximately rectangular cross-section. 3. Telescopic sight according to claim 1 or 2, characterized in that the outer surface of the end tube (11) is designed to reduce reflection. 4. Device for a telescopic sight according to claim 1, 2 or 3, characterized in that the aperture tube (11) is ^ Injection molded part is executed. 5. Device for a telescopic sight according to claim 4, characterized in that the aperture tube (11) is designed as a sleeve tube. 6. Device for a telescopic sight according to claim 1, characterized in that the aperture tube (11) is clamped to a screw-on guide bar (23) for a reticle light (17).