JPH0342330Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a device for automatically correcting inclination errors in two-dimensional directions in surveying machines such as two-dimensional levels and automatic vertical sighting machines.

The present invention relates to a device for automatically correcting inclination errors in two-dimensional directions in surveying machines such as conventional automatic vertical sighting machines.

Conventional automatic vertical sighting devices are equipped with a device that automatically corrects vertical errors due to tilting of the aircraft only in the longitudinal direction, but they are also equipped with a device that corrects errors due to tilting in the left and right directions. Not yet. Therefore, we first set the longitudinal vertical plane in a certain direction, then turn the aircraft 90 degrees, set the longitudinal vertical plane again, and find the intersection of both to set the true zenith direction. This was extremely complicated, and it was impossible to aim directly at the true zenith direction.

In order to solve the above-mentioned conventional problems, this invention
It is possible to automatically correct the tilt error of the aircraft in two-dimensional directions (front, rear, left, and right) at the same time, and it is possible to directly set the true zenith direction with an automatic vertical sighting device. The present invention proposes a correction device that allows a pentaprism or the like that rotates to enter a beam of light directed toward the zenith, and outputs an accurate horizontally rotating beam of light.

In the following, an embodiment of this invention shown in the drawings will be described. A first simple pendulum 3 and a second simple pendulum are each suspended swingably from horizontal pivots 1 and 2 that are orthogonal to each other in the body of a surveying machine. A pendulum 4 is installed.

The first simple pendulum 3 is installed on the optical axis 6 of a collimation lens 5 whose optical axis is set in the vertical direction, and a first reflecting member 7 made of a reflecting mirror or prism is attached to the lower part of the collimation lens 5. The incident and reflected optical axes are vertical and horizontal on the reflective surface, forming a horizontal optical axis 8 perpendicular to the optical axis 6.

The second simple pendulum 4 has a second reflecting member 9 attached to its lower part, which has two reflecting surfaces that can always reflect the incident light beam at right angles regardless of changes in the incident angle, such as a pentaprism. The incident and reflected optical axes are vertical and horizontal on the reflective surface, and the horizontal optical axis 8
A vertical optical axis 10 is configured at right angles to the vertical axis.

On the horizontal optical axis 8, a concave lens 11 and a convex lens 12 having twice the focal length of the concave lens are provided.
The convex lens 12 is arranged so that the object focal points of the two convex lenses coincide with each other, and the image focal point of the convex lens 12 is located on the second reflecting member 9 side.

The first embodiment shown in FIG. 1 shows an example configured as an automatic vertical collimation device, in which the light flux incident on the second reflecting member 9 along the vertical optical axis 10 is reflected at right angles to the horizontal optical axis. 8, and enters the first reflecting member 7 through the convex lens 12 and the concave lens 11, where it is reflected at right angles and exits along the vertical optical axis 6, and passes through the collimation lens 5 as an image. It is reflected in the horizontal direction by a reflecting member 13 placed in front of the focal point, and an image is formed on the focusing plate 14 provided on the image focal point of the collimation lens 5. The vertical point is determined by observing this projected image with the eyepiece lens 15. Configured to collimate.

The second embodiment shown in FIG. 2 shows an example configured on a two-dimensional level, in which the collimation lens 5
A light source 16 that emits laser or infrared rays is provided on the object focus of
It is reflected vertically to the vertical optical axis 10.
The third reflecting member 17, which is similar to the second reflecting member 9 such as a pentagonal prism, is arranged above so as to be able to turn, and is configured to emit light while turning in the horizontal direction.

In the above configuration, if the aircraft is now tilted by θ in the longitudinal direction and β in the horizontal direction, the first simple pendulum 3 is tilted by θ with respect to the aircraft due to the inclination θ of the aircraft in the longitudinal direction and is oriented vertically. The optical axis 8 of the light beam emerging from the collimation lens 5 is inclined by θ with respect to the first reflecting member 7, and the horizontal optical axis 8 of the reflected light beam is therefore inclined by 2θ according to the law of reflection.

Therefore, if this light beam is made to enter the second reflecting member 9 as it is, the correction will not be achieved, but since it passes through the concave lens 11 and the convex lens 12 before that, the convex lens 1
The inclination α of the optical axis of the light beam emerging from lens 1 is
1 and 12, α = incident angle × focal length of concave lens / focal length of convex lens = 2θ × f / 2f = θ, and the light beam enters the second reflecting member 9 as a horizontal beam from the convex lens 11, Correction for the tilt of the aircraft in the longitudinal direction is established.

On the other hand, since the second simple pendulum 4 is oriented vertically with an inclination of β to the aircraft body due to the horizontal inclination β of the aircraft body, the horizontal light beam is always emitted perpendicularly to the horizontal inclination of the aircraft body. Furthermore, when the light flux that has been horizontally corrected with respect to the longitudinal inclination θ as described above enters the second reflection member 9 of the second simple pendulum 4, the second reflection member 9 receives the incident light from its entrance surface. Due to the property of always emitting the reflected light at right angles to the incident light regardless of the angle, the second reflecting member 9
Even if the plane of incidence is tilted by θ in the front-rear direction, it will be reflected at right angles to horizontally incident light and emitted vertically.

Therefore, even if the aircraft is tilted in any two-dimensional direction, the vertical optical axis 10 can always be maintained in the vertical direction, which makes it easy for the vertical sighting device to sight the vertical point. Furthermore, on a two-dimensional level, it is possible to always emit an accurate horizontally rotating light beam.

As described above, according to this invention, a first simple pendulum is installed on the optical axis of a collimation lens whose optical axis is set in the vertical direction, and is swingably suspended from a horizontal axis.
The first simple pendulum is provided with a first reflecting member that forms an optical axis horizontal to the swinging direction of the first simple pendulum on a reflective surface with respect to the optical axis of the collimation lens, and A second simple pendulum is installed swingably suspended from orthogonal pivots, and the second simple pendulum forms an optical axis in a vertical direction on the reflecting surface with respect to the horizontal optical axis of the first reflecting member. A second reflecting member is provided, and a concave lens and a convex lens having a focal length twice that of the concave lens are arranged on the horizontal optical axis between the first and second reflecting members so that the image focus of the concave lens and the object focus of the convex lens are aligned. Since it is arranged so that
Errors in the two-dimensional tilt of the aircraft, front and back, left and right, can be automatically corrected. It is possible to perform collimation, and also to obtain an accurate horizontally rotating light beam on a two-dimensional level.

[Brief explanation of the drawing]

FIGS. 1 and 2 are longitudinal sectional views showing different embodiments of this invention. 1... Axis, 2... Axis, 3... First simple pendulum,
4... Second simple pendulum, 5... Collimation lens, 6... Optical axis, 7... First reflecting member, 8... Horizontal optical axis, 9... Second reflecting member, 10... Vertical light Axis, 11...concave lens, 12...convex lens.

Claims (1)

[Claims for Utility Model Registration] 1. A first simple pendulum that is swingably suspended from a horizontal axis is installed on the optical axis of a collimation lens whose optical axis is set in the vertical direction, and the first simple pendulum is provided with a first reflecting member that forms an optical axis horizontal to the swinging direction of the first simple pendulum on a reflective surface with respect to the optical axis of the collimation lens, and a pivot axis that is perpendicular to the pivot axis of the first simple pendulum. A second simple pendulum is installed swingably suspended on the second simple pendulum, and the second simple pendulum is provided with a second reflecting member that forms an optical axis in a vertical direction on a reflective surface with respect to the horizontal optical axis of the first reflecting member. , a concave lens and a convex lens having a focal length twice the focal length of the concave lens are arranged on the horizontal optical axis between the first and second reflecting members so that the image focus of the concave lens and the object focus of the convex lens coincide. An automatic correction device for a two-dimensional directional tilt error in a surveying machine, characterized in that: 2. Surveying according to claim 1 of the utility model registration claim, wherein the second reflecting member is a reflecting member having two reflecting surfaces that always reflect incident light at right angles regardless of changes in the incident angle. Automatic correction device for two-dimensional directional tilt errors in machines.