JPH0138241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic altitude angle correction mechanism for a surveying instrument, such as a surveying instrument, which automatically corrects the high angle of the instrument even if the instrument is tilted, thereby allowing correct reading.

The present invention aims to provide an altitude angle automatic correction mechanism that has a simple configuration and is easy to adjust. a degree dial; a reflecting member for directing a light beam from the altitude dial scale on a vertical axis passing through the center of the altitude dial toward a first objective lens; and a first objective lens for converting the light beam into a parallel beam. a second objective lens that is fixed to the surveying instrument body and forms an image of the parallel light beam; and a focusing plate that is also fixed to the surveying instrument body. and an inclination member for inclining the correction device so as to have the same inclination as the inclination of the main body of the surveying instrument.

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, the altitude protractor 2 is integral with a collimating telescope (not shown) and is rotatable about a horizontal axis 4. The altitude protractor 2 is attached coaxially to a first circular member 6, which, by means of a belt 10, converts a second circular member 8 having the same diameter and containing a compensator 7 into the altitude. Hang it right next to the dial. The second circular member 8 has a horizontal shaft 4
a reflecting member 12 that refracts the luminous flux from the altitude dial on the vertical line 9 passing through downward; and a first objective lens 14 that converts the refracted luminous flux into a parallel luminous flux.
and are arranged. Here, the center of gravity of the second circular member is located at the center of the circle. Further, a second objective lens 16 and a focus plate 18 for forming an image of the parallel light beam are arranged in the survey instrument main body 15 below the correction device 7. When the survey instrument main body 15 is tilted in the above configuration, as shown in FIG. The main body of the surveying instrument 15 is centered on the altitude scale on the vertical axis passing through 4.
lean in the same direction. As a result, even when the survey instrument main body 15 is tilted, the light flux from the altitude scale on the vertical axis passing through the horizontal axis 4 enters the correction device 7, and the correction device 7 The injection is performed in a direction parallel to the machine axis 17 connected to the machine axis 17. Although the first objective lens 14 and the second objective lens 16 are misaligned, they face each other, and the altitude degree scale image on the vertical axis passing through the horizontal axis 4 is formed on the focus plate 18.

Another embodiment of the invention, as shown in FIG.
Gear teeth are formed on the outer periphery of the third circular member 20 corresponding to the first circular member 6 of the above embodiment. Similarly, a fourth circular member 22 corresponding to the second circular member 8 has the same diameter as the third circular member 20, and teeth that mesh with the teeth of the third circular member 20 are formed on its outer periphery. A fourth circular member 2 is attached to the outer periphery of the circular member 21 that connects these.
The movement of the fourth circular member 22 is controlled by forming teeth that mesh with the third circular member 2 and the third circular member 20.
0. This transmission can also be done by a link mechanism. The optical configuration and correction principle are the same as in the other embodiments described above.

As described above, the present invention includes an altitude protractor integrated with a collimating telescope, and a reflecting member that refracts the light beam downward from the altitude graduation scale on the vertical axis passing through the center of the altitude protractor. and a first objective lens for converting the above-mentioned light flux into a parallel light flux, which is always suspended vertically, and a second objective lens fixed to the surveying instrument body and forming an image of the above-mentioned parallel light flux. It consists of an objective lens and a focusing plate which is also fixed to the surveying instrument body, and the above-mentioned correction device is suspended so as to have the same inclination as the surveying instrument body. This is a simple and compact automatic altitude and angle angle correction mechanism that is suitable for being incorporated into surveying instruments that take up little space.

[Brief explanation of drawings]

FIG. 1 is a side view showing the principle of an embodiment of the present invention;
FIG. 2 is a front view of the principle shown in FIG. 1, FIG. 3 is a side view of the embodiment shown in FIG. 1 in a tilted state,
FIG. 4 is a side view showing the principle of another embodiment of the invention. 2...Altitude protractor, 4...Horizontal axis, 6...1st
Circular member, 8... Second circular member, 10... Belt, 12... Reflective member, 14... First objective lens, 16... Second objective lens, 20... Third circular member, 22... Third circular member 4 circular members.

Claims (1)

[Claims] 1. An altitude protractor integrated with a collimating telescope, a reflecting member that directs the luminous flux from the altitude protractor scale on a vertical axis passing through the center of the altitude protractor towards the first objective lens, and a correction device that integrally includes a first objective lens for forming a parallel light beam and is always suspended vertically; a second objective lens that is fixed to the surveying instrument body and forms an image of the parallel light beam; Automatic altitude angle correction for a surveying instrument, characterized in that it has a focus plate fixed to the surveying instrument body, and a tilting member that tilts the correction device so that it has the same inclination as the surveying instrument body. mechanism.