JPH023969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention provides a method for aligning the optical axis of a collimating telescope so that it passes through two points that serve as alignment references.
This invention relates to a sighting telescope that can simultaneously focus and sight two objects.

[Technical background of the invention and its problems]

FIG. 1 shows an example of the arrangement of the optical system of a conventional collimating telescope. For example, light emitted from a target 1 printed with a pattern suitable for collimation passes through an objective lens 2, passes through erecting prisms 3a and 3b, and reaches a focusing lens 4. Then, this focusing lens 4
By adjusting the position along the optical axis 5, an image is formed on the reticle 6. A crosshair 7 is printed on the focusing plate 6 at a position where the optical axis 5 passes through. However,
This cross line 7 and the pattern image of the target 1 are observed in a superimposed manner through the eyepiece 8, and the relative positions are adjusted so that the center of the pattern of the target 1 and the center of the cross line 7 of the reticle 6 coincide. A target 1 is collimated with reference to the optical axis 5 of the collimating telescope.

By the way, as shown in Fig. 2, the collimating telescope 9
target 10, located at two reference points using
It is often desired to arrange targets 13, 14, 15, etc. placed at object points on a straight line 12 passing through point 11. To meet such alignment requirements, first, the direction and position of the collimating telescope 9 itself is adjusted so that the optical axis 16 of the collimating telescope 9 passes through the centers of the two targets 10 and 11. Optical axis alignment is required. The procedure for aligning the optical axis is
Normally, the collimating telescope 9 is placed so that the axis of its lens barrel approximately coincides with a straight line connecting the targets 10 and 11, and it is confirmed that both targets 10 and 11 are within the field of view of the telescope 9. If it is not in the field of view, correct the approximate direction and position until it is in the field of view and reposition it (direction of arrow A in Figure 2). Here, focus on the target 10 that is closer to the sighting telescope 9, and move the sighting telescope 9 in parallel.
Align the crosshair 7 with the center of the target 10.
Next, focus on the target 11, and align the crosshair 7 and the target 1 only by correcting the direction of the collimating telescope 9.
Match the centers of 1. By focusing on the target 10 again, performing parallel movement correction, and repeating the direction correction on the target 11, the optical axis 16 is finally aligned with the straight line 12 connecting the targets 10 and 11. be able to. In this way, when one focused target can be observed, the other unfocused target cannot be observed. Therefore, a problem arises in that a considerable amount of time is consumed until the optical axis alignment is converged. Moreover, sometimes the target may be lost in the field of view due to incorrect procedures or correction methods, resulting in extremely inefficient work and requiring a high degree of skill to operate.

[Purpose of the invention]

The present invention has been made in consideration of the above circumstances, and when adjusting the direction and position of the collimating telescope in order to pass through the two targets to align the optical axis, it is possible to To provide a collimating telescope capable of simultaneously observing and collimating two targets and easily aligning optical axes in a short time without requiring skill in repeating and adjusting alternate focusing and collimation.

[Summary of the invention]

In order to focus and collimate two targets at the same time, a beam splitter is installed before and after the main focusing lens, and the auxiliary focusing lens is placed in parallel with the main focusing lens so that they can be focused independently. A bypass optical path is provided, and target images at different distances are superimposed and formed on a focusing mirror surface on the same optical axis that is aligned again through both optical paths, and while observing both images simultaneously, the collimating telescope is That is, the direction and position of the optical axis are adjusted.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on examples with reference to the drawings.

FIG. 3 shows the configuration of the collimating telescope of this embodiment. One erecting prism 18a is provided opposite the objective lens 17. The other erecting prism 18b is placed oppositely on the optical axis 19 of this erecting prism 18a. Furthermore, the optical axis 2, which becomes the main optical path, is reversed again by the erecting prism 18b.
0, from the erecting prism 18b side, the first prism-shaped beam splitter 21, the main focusing lens 22,
A second prismatic beam splitter 23, a focusing plate 24 and an eyepiece 25 are arranged in series. The first and second prismatic beam splitters 21 and 23 each consist of semi-transparent mirrors 26 and 27 and reflecting mirrors 28 and 29 provided opposite to these semi-transparent mirrors 26 and 27, respectively. These semi-transparent mirrors 26, 27 and reflecting mirrors 28, 2
9, the light that has passed through these is the main focusing lens 22
is aligned and arranged so as to return to the optical axis 20 again through a compensating focusing lens 30 disposed on the optical axis 20a, which is a supplementary optical path parallel to the optical axis 20, which is the main optical path in which the optical axis 20 is disposed. On the other hand, the main focusing lens 22 and the compensating focusing lens 30 each include slide mechanisms 31 and 32 that are mutually independent focusing mechanisms. These slide mechanisms 31 and 32 have pins 33 and 34 implanted in the outer peripheries of the lens barrels of the main focusing lens 22 and the compensating focusing lens 30, respectively. These pins 33 and 34 are fitted into helical grooves on the inner surfaces of operating rings 35 and 36 through slide guide grooves, respectively. Then, operation ring 3
By rotating 5 and 36, the main focusing lens 2
2 and the compensating lens 30 are moved back and forth to achieve focusing.

Next, the operation of the collimating telescope with the above configuration will be described.

The light emitted from the target 37 passes through the objective lens 1.
7, the incident light image is erected through erecting prisms 18a and 18b, and reaches the first prism-shaped beam splitter 21. The light that passes straight through the semi-transparent mirror 26 of the first prismatic beam splitter 21 passes through the main focusing lens 22 and reaches the second prismatic beam splitter 23 . Furthermore, the light that has passed through the second prism-shaped beam splitter 23 moves the position of the main focusing lens 22 to the slide mechanism 3.
By moving the target 37 forward and backward along the optical axis 20 using the lens 1, an image is formed on the focusing plate 24, and an optical image of the target 37 can be observed through the eyepiece 25. On the other hand, the light emitted from the target 38, which is provided on the front side of the target 37 and forms the reference axis 39 together with the target 37, passes through the objective lens 17 and the erecting prisms 18a and 18b, similar to the light emitted from the target 37. A first prismatic beam splitter 21 is reached. The light reflected by the semi-transparent mirror 26 of the first prismatic beam splitter 21 passes through the reflecting mirror 28 and reaches the compensating lens 30 along the optical axis 20a. The light that has passed through this confocal lens 30 is sent to the second prismatic beam splitter 2.
It is reflected by the reflecting mirror 29 and the semi-transparent mirror 27 of 3, and the optical axis 20
, and reaches the focus plate 24. Then, the position of the confocal lens 30 is adjusted to the optical axis 2 by the slide mechanism 32.
By moving the target 38 forward and backward along 0a, an optical image of the target 38 is formed on the reticle 24, and this image can be observed through the eyepiece 25.
Therefore, the targets 37 and 38 can be simultaneously imaged and superimposed on the focusing mirror 24 for observation.
In this case, the target 37 is focused by the main focusing lens 22, and the target 38 is focused by the main focusing lens 22.
Focused with the compensating lens 30, but the target 37
and the distance of the objective lens 17 to the target 38, and the distance of the target 3 to the main focusing lens 22.
8 is the target 3 for the confocal lens 30.
7 are set so that they are outside the range of the focal depths of the respective focusing lenses 22 and 30, the light that has proceeded from the semi-transparent mirror 26 of the first prism beam splitter 21 to the other remaining optical path will be , since no image is formed on the focus plate 24, there will be no interference with observation. After the double images of the targets 37 and 38 are formed on the focusing plate 24, the focusing plate 24 is
The crosshair on the optical axis 20 of the surface and the target 3
While observing the images 7 and 38, adjust the sight direction and position using the adjustment mechanism (not shown) of the sighting telescope, and when the centers of the targets 37 and 38 are aligned with the crosshairs, the targets 37 and 38 The optical axis alignment is completed. However, target 3
The main focusing lens 22 is sequentially focused on a target (for example, targets 40 and 41 in FIG. 3) to be placed on a reference axis 39 passing through the centers of the lenses 7 and 38. The purpose of alignment can then be easily achieved by observing and adjusting the position of the target until it is centered on the crosshairs of the reticle 24. At this time, if the overlap of the images formed by the auxiliary focusing lens 30 interferes with observation, the auxiliary focusing lens 30 may be moved to a position where no target is in focus.
All you have to do is advance and retreat. Alternatively, a shutter may be provided in the main optical path, both complementary optical paths, or either one.

As described above, the collimating telescope of this embodiment allows simultaneous observation with only one focusing of the initial setting, that is, the alignment of the optical axis connecting two reference points, so that collimation work can be performed quickly and with high precision. be able to. Above all,
This is effective when collimating work is performed by an unskilled person, when the skill level has decreased due to not being involved in collimating work for a long period of time, when there are many targets to be collimated, and when the initial setting of optical axis alignment work is high.

Note that an optical system with an automatic level correction mechanism may be attached to the collimating telescope. Furthermore, the collimating telescope of the present invention may be connected to an electro-optical image receiving unit such as an ITV camera, and may also be equipped with an automatic alignment servo mechanism for direction, position, and adjustment of the optical axis. Often, in this case the collimation task can be performed automatically.

〔Effect of the invention〕

The collimating telescope of the present invention requires only one initial setting for collimation, that is, optical axis alignment connecting two reference points.
Simultaneous observation can be performed by focusing twice, so collimation work can be performed quickly and with high precision. It is especially effective for sighting work performed by unskilled people, when the skill level has decreased due to not being involved in sighting work for a long time, when there are many sighting targets, and when initial setting optical axis alignment work is performed frequently. play.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the optical system of a conventional collimating telescope, Fig. 2 is an explanatory diagram showing the procedure for aligning the optical axis of the collimating telescope with a reference target, and Fig. 3 is an explanatory diagram showing the collimating telescope of the present invention. FIG. 2 is a diagram showing the configuration of an optical system. 17: Objective lens, 20: Main optical path (optical axis), 2
0a: Complementary optical path (optical axis), 22: Main focusing lens, 2
4: Focal plate, 26, 27: Semi-transparent mirror, 28, 29:
Reflector, 30: Compensating lens, 31, 32: Focusing mechanism.

Claims (1)

[Claims] 1. An objective lens that receives optical images of two targets constituting a reference axis, a focusing plate that focuses the optical images that have passed through the objective lens, and an objective lens that is provided between the objective lens and the focusing plate. Two semi-transparent mirrors forming a main optical path, and a supplementary optical path by reflecting light branched from the semi-transparent mirror on the objective lens side, which is disposed opposite to each of the semi-transparent mirrors. two reflecting mirrors that reflect the light that has passed through the auxiliary optical path and return it to the main optical path passing through the semi-transparent mirror on the focus plate side; focusing lenses, and these focusing lenses are moved back and forth independently along each of the optical paths, and optical images of the two targets that have passed through the main optical path and the auxiliary optical path are displayed on the focusing plate. A collimating telescope characterized by comprising a focusing mechanism that forms images in a superimposed manner.