JPH0430492Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a laser aiming device for use in surveying instruments such as levelers and transits.

[Conventional technology]

As a conventional laser aiming device of this type, the fourth
The ones shown in Figs. 1, 5, and 6 are well known. In the device shown in FIG. 4, a finder 2 is installed on a laser oscillator 1, a collimator 3 is attached to the front end of the laser oscillator, and a laser beam is emitted directly toward the front of the laser oscillator 1.
The irradiation point is passed through the collimator 3 to the finder 2.
Aim with. In the one shown in FIG. 5, a laser oscillator 5 is installed on a telescope 4, a switching prism 6 is rotatably attached to the rear end of the laser oscillator 5, and the laser beam emitted backward from the laser oscillator is switched to the switching prism 6. The telescope 4 is bent and introduced into the telescope 4 through the eyepiece 7, and the telescope 4 is also used as a collimator to emit a laser beam from its front end. When collimating with the telescope 4, the switching prism 6 is moved to a position away from the eyepiece 7. In the system shown in FIG. 6, a laser oscillator 9 is installed on a telescope 8, and a reflective optical element 10 and a condenser lens 11 are connected to a semi-transparent mirror 12 between the rear end of the laser oscillator 9 and the rear end of the telescope 8. A laser collimator 13 consisting of a laser oscillator 9 is provided.
The laser beam emitted further backward is introduced into the telescope 8 via the laser collimator 13, and is emitted forward from the objective lens 14.

[Problem that the idea aims to solve]

However, each of these conventional methods has the following problems. In the one shown in FIG. 4, the laser optical axis and the finder optical axis do not coincide, resulting in a collimation error. In the case of the one shown in FIG. 5, although the laser optical axis coincides with the optical axis of the telescope, it is not possible to irradiate and collimate the laser beam at the same time. The one in Figure 6 can irradiate and collimate the laser beam at the same time, but because the reflective surface of the laser optical system is located on the focal point side of the telescope, there is significant diffuse reflection inside the optical system, which interferes with the collimation. Even if a special semi-transparent mirror is used to reduce diffuse reflection, it is difficult to obtain a good view as long as the semi-reflective mirror is on the focal point side.
In addition, the optical system of the telescope 8 and the laser collimator 1
Since the optical system 3 is shared with the optical system 3, in order to guide the laser beam onto the optical axis of the telescope 8 and further adjust it so that they are on the same optical axis, open the lens barrel of the laser collimator 13 and use the reflective optical element 10 or half Transparent mirror 12
It is a very labor-intensive task that requires skill, and is not something that ordinary users can easily adjust on site. In particular, laser oscillators generate considerable heat after being turned on.
The surrounding structure undergoes so-called thermal deformation due to heat transfer, causing a slight misalignment between the telescope's optical axis and the laser optical axis. Even a slight deviation can result in a serious error in a device that requires high precision, such as a surveying instrument. However, in any of the above-mentioned conventional cases, the laser oscillator is fixed in a fixed relationship with respect to the telescope, making it difficult to mutually adjust the optical axes. The purpose of this invention is to eliminate the various problems mentioned above. In other words, when the laser optical axis is out of alignment with the optical axis of the telescope, it can be easily corrected and adjusted with a simple structure. It's about doing.
Another purpose is to prevent the laser collimator from affecting the field of view of the telescope.

[Means to solve the problem]

In the laser aiming device according to the present invention, a laser oscillator is attached to a mount provided on the outside of the telescope so as to be tiltable up and down, and there is a tilting mechanism between the mount and the laser oscillator that allows manual adjustment of the vertical inclination of the laser oscillator. Provide a fine adjustment mechanism. Further, a laser collimator that reflects or bends the laser beam and emits the laser beam from outside and in front of the objective lens of the telescope is installed vertically on the outside of the front end of the laser oscillator. The aperture is much smaller than the aperture of the lens, and it is located close to the front of the objective lens.

[Effect]

With this configuration, by finely adjusting the vertical inclination of the laser oscillator with respect to the telescope using the inclination fine adjustment mechanism, it is possible to easily correct and adjust the misalignment of the laser optical axis with respect to the optical axis of the telescope. Also,
Laser spots can be sighted simultaneously within the field of view of the telescope. Furthermore, since the laser collimator is installed outside the telescope and perpendicularly from the front end of the laser oscillator, there is no problem with collimation due to diffused reflection inside the laser collimator. In addition, the tip emission part of the laser collimator is much smaller than the aperture of the objective lens of the telescope and is located very close to the front of the objective lens. has almost no effect.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. 1 and 2 show an example in which the present invention is applied to an autolevel, in which a telescope 15 is installed on a leveling stand 21 installed on a bottom plate 20 via a leveling screw 19. Further, in the example shown in the figure, the laser oscillator 16 is mounted on a front H-shaped mount 22 that is mounted upright halfway outside the telescope 15 so as to be tiltable up and down about a rotating shaft 27. In addition, code 2
3 is an eyepiece of the telescope 15. The pedestal 22 has both lower side portions 24 fixed with mounting screws 2.
5, it is fixed to both sides of the telescope 15 so that its position can be adjusted slightly. A rotation shaft 27 of the laser oscillator 16 is horizontally suspended between both upper side portions 26 of the pedestal 22 . The vertical tilt of the laser oscillator 16 can be manually finely adjusted using a tilt adjustment mechanism 28 as described below. That is, the arm 29 is attached to the protruding end of the rotating shaft 27.
is fixed in a hanging manner, while a fine adjustment screw 30 that clamps the arm 29 and restricts its rotation, and a protrusion 31 to which a spring force is applied are provided on the lower side 24 of one side of the pedestal 22. are set up opposite each other. A scale plate 32 is attached to one side of the pedestal 22, and an index window 33 for reading the scale of the scale plate 32 is provided on the arm 29. On the other hand, a laser collimator 18 is vertically installed at the front end of the laser oscillator 16. This laser collimator 18 includes a horizontal lens barrel 35 extending straight forward from an outer case 34 of the laser oscillator 16.
A lens 36 and a prism 37 are disposed within the horizontal barrel 35, and a lens 39 and a prism 40, which is an optical element for laser emission, are disposed within a vertical barrel 38 that is perpendicular to the tip of the horizontal barrel 35. It was established. The tip emitting part of the laser collimator 18 is much smaller than the aperture of the objective lens 17 (usually the effective diameter is 30 mm or more) and located close to the front of the objective lens 17, as shown in FIG. 3, so as not to obstruct the field of view of the telescope 15. It is located in For this reason, the laser emitting optical element (prism 40) does not need to be a semi-transparent mirror that transmits visible light, but may be anything that refracts, transmits, or reflects laser light. In addition, 41 is a focus adjustment photograph of the laser collimator 18. Therefore, this laser aiming device has an optical configuration as shown in FIG. It is bent and emitted from the front of the telescope 15 in alignment with its optical axis. If the emission optical axis deviates from the optical axis of the telescope 15, the inclination of the laser oscillator 16 with respect to the telescope 15 can be adjusted using the inclination fine adjustment mechanism 28, that is, by turning the fine adjustment screw 30 to adjust the inclination of the laser oscillator 16. It can be corrected and the angle of inclination can be determined by reading the scale on the scale plate 32.

[Effect of the idea]

The present invention has the following effects. A laser collimator is installed vertically on the outside of the front end of the laser oscillator, and the laser beam emitted from the laser oscillator is emitted from the outside front of the objective lens of the telescope, making it possible to align the emission optical axis of the laser beam with the optical axis of the telescope. At the same time, it is possible to simultaneously aim a laser spot within the field of view of the telescope. A laser oscillator is attached to a mount provided on the outside of the telescope so as to be tiltable up and down, and a fine tilt adjustment mechanism is provided between the mount and the laser oscillator to manually adjust the vertical inclination of the laser oscillator. A laser collimator is installed vertically at the front end of the telescope, so if the optical axis of the laser beam deviates from the optical axis of the telescope, corrections can be easily made on site. Since the laser collimator is completely independent of the telescope and is placed vertically in front of the front end of the laser oscillator, there is no problem with collimation due to diffused reflection inside the laser collimator. The tip emission part of the laser collimator is much smaller than the aperture of the objective lens of the telescope and is located very close to the front of the objective lens. There is no effect.

[Brief explanation of drawings]

Figure 1 is an optical configuration diagram showing the outline of the present invention, Figure 2
The figure is a side view of one embodiment, FIG. 3 is a front view of the same,
FIG. 4, FIG. 5, and FIG. 6 are optical configuration diagrams of conventional examples, respectively. 15...Telescope, 16...Laser oscillator, 1
7... Objective lens, 18... Laser collimator, 22... Mount, 27... Rotation shaft, 28... Inclination fine adjustment mechanism, 30... Fine adjustment screw, 40... Prism (laser emitting optical element).

Claims (1)

[Scope of utility model registration request] A laser oscillator is attached to a mount provided on the outside of the telescope so as to be tiltable up and down, and a fine tilt adjustment mechanism is provided between the mount and the laser oscillator to manually adjust the vertical inclination of the laser oscillator. A laser collimator that reflects or bends the laser beam and emits the laser beam from outside and in front of the objective lens of the telescope is installed vertically on the outside of the front end of the oscillator. A laser aiming device characterized in that the laser aiming device is made much smaller and located close to the front of the objective lens.