JPH02126111A - Reference beam correcting radiator for surveying instrument - Google Patents

Abstract

PURPOSE:To easily correct overs and shorts of the extent of correction with a single compensator by providing a correcting lens system in the optical path of a beam passing the compensator and correcting overs and shorts of the extent of correction due to the compensator by the power of the correcting lens system. CONSTITUTION:In this reference beam correcting radiator of a surveying instrument, the light from a light source 1 is radiated as a reference beam by a radiating lens system and the direction of radiation of the reference beam is kept at a certain angle against the inclination of a device main body 6 by a compensator. For example, a convex lens 4 and a concave lens 5 are combined and provided as the correcting lens system in the optical path of the beam passing the compensator 3, and the light made incident at an angle beta on the convex lens 4 is emitted at an angle alpha by the concave lens 5. Though an optical axis O-O of the correcting radiator is inclined at the angle alpha to a perpendicular line V-V and the extent of correction due to the compensator 3 is deficient, this deficiency of the extent beta of correction is compensated by lenses 4 and 5 of the correcting lens system to cause the optical axis O-O to coincide with the perpendicular line V-V.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a correction radiation bag T using a reference beam compensator in a surveying machine such as a light level surveying machine, which is used as a reference in construction surveying and the like.

Conventional technology and problems Conventionally, the reference beam radiation device of Fuchi@Kiken should be installed correctly on a horizontal mount, but in reality, it is installed at a slight angle of inclination, so the inclination of this device It is necessary to radiate the reference beam by correcting the Base 11 for the tilt of this device! As a conventional technique for a reference beam correction radiation device equipped with a compensator for correcting the inclination of a reference beam that maintains the radiation direction of the beam constant, for example, as described in Japanese Patent Application Laid-Open No. 60200117, so that the rays of light are always reflected in the vertical direction.
Complex t! such as an erect image prism or a Porro prism. H
[A combination of 11 dihedral reflectors such that their optical paths are orthogonal to each other (a complex structure in which they are rigidly suspended, or a radiation lens as described in JP-A-63-179208) A device consisting of a convex lens fixed to the device and a concave lens suspended from the device in a complicated distance relationship with respect to the convex lens; A combination of multiple liquid compensators filled with liquid is known, but as mentioned above, all of them have a complex structure, have many elements that are unstable in accuracy, and are expensive. In particular, for example, with the liquid compensator mentioned above, the target correction amount is limited to 1 (which cannot be obtained with a flit liquid compensator) due to the constraints of the refractive index of the liquid that can actually be obtained. Therefore, there were problems such as having to secure a plurality of liquid compensators in combination.

As a means to solve the problems, the present invention basically emits a light beam emitted from a light source as a reference beam using a radiation lens system, and also compensates the radiation direction of the reference beam with respect to the tilt of the device. A reference beam correction radiation device of a surveying machine, which is maintained constant by a sweater, is equipped with a correction lens system in the optical path of the beam that has passed through the compensator. The present invention provides a reference beam correction radiation device for a surveying machine configured to further correct excess or deficiency in the amount of correction due to the sweater, and further, in the above device, the correction lens system is a combination of a convex lens system and a concave lens system. , and is configured to correct excess or deficiency in the same direction as the correction by the compensator, or the correction lens system is composed of a combination of a convex lens system and a convex lens system, and the correction lens system is configured to compensate for excess or deficiency in the amount of correction by the compensator. At the same time, a device configured to reverse the correction direction; furthermore, in the above device, the correction lens system also serves as a radiation lens system, and the radiation lens system can be omitted; Furthermore, it is an object of the present invention to provide a device that can be used not only to compensate for excesses and deficiencies in the compensator's correction amount in principle, but also to compensate for excesses and deficiencies in the correction amount due to manufacturing errors.

Operation As shown in the embodiments of FIGS. 1 and 4, the device of the present invention emits a light beam emitted from a light source l as a reference beam through a radiation lens system 2, and also adjusts the reference beam to the inclination of the device body 6. In a reference beam correction radiation device for a surveying machine in which the radiation direction is maintained constant by a compensator 3,
A correction lens system 4.5 is installed in the optical path of the beam that has passed through the compensator 3, and the correction lens system 4.5 is configured to correct excess or deficiency in the amount of correction by the compensator 3 using the magnification of the correction lens system 4.5. 1, the correction lens system consists of a combination of a convex lens system 4 and a concave lens system 5, and in the apparatus shown in FIG. 4, the correction lens system consists of a combination of a convex lens system 4 and a convex lens system 5.

To explain the operation of the reference beam correction radiation device for a surveying machine according to the present invention having the configuration shown in FIG. 1 above, FIG. 3 shows the following:
This is an explanatory diagram showing the principle of an embodiment of the correction lens system according to the present invention, which is a so-called Galilean telescope lens system consisting of a convex lens 4 and a concave lens 5. Light incident on the convex lens 4 at an angle of β is The concave lens 5 causes the light to be emitted in the same direction at an angle of α with the optical axis O-O as the axis of symmetry.

Here, if the magnification of the lens system is m, it is α-mβ, and the magnification m is expressed as m=fo/fe.

(El, L, fO: Focal length fe of the entrance side lens system:
Image point distance of the exit side lens system FIG. 2 is an explanatory diagram showing the principle of the reference beam correction radiation device according to the present invention having the correction lens system shown in FIG. 1. In this case, the optical axis O of the device of the present invention is -O is Ti; The other side with the concave lens 5 is m-α/
By setting β, the light is emitted at an angle α with respect to the optical axis O-0 according to the rule 111 in FIG. 3, and coincides with the vertical line V-V.
．． 5 can compensate for the deficiency in the correction amount β of the compensator 3.

Incidentally, if the correction amount β by the compensator 3 becomes excessive, it can be similarly corrected by setting m-α/β to 1.

At this time, since the inclination of the liquid in the liquid compensator 3 is α, the angle when the light beam passes through the liquid with this wedge angle α is β, so β-(n-1)α n: wedge shape The relationship is the refractive index of the liquid.

Next, to explain the operation of the reference beam correction radiation device for a surveying machine according to the present invention having the configuration shown in FIG. 4, FIG.
This is an explanatory diagram showing the principle of another embodiment of the correction lens system according to the present invention, which is composed of a so-called Keprellian telescope lens system consisting of a convex lens 4 and a convex lens 5.
The light incident at an angle α is emitted by the convex lens 5 at an angle α in the opposite direction with the optical axis O-0 as the axis of symmetry.

Here, if the magnification of the lens system is m, it is α-mβ, and the magnification m is expressed as m='o/fe.

However, fO; incident (y) focal length of the lens system rC: focal length of the exit lens system 2 Figure 5 is an explanatory diagram of the apparatus of the example in Figure 4. In this case, the optical axis 〇-〇 of the device main body 6 is j'3)
For the straight line ■ - V
By setting α/β, the light is emitted in the opposite direction at an angle of α to the optical axis O-0 according to the principle shown in Figure 6 of Ai7, and the vertical line V-V is reflected. Therefore, the deficiency in the correction amount β of the compensator 3 can be compensated for by the correction lens system 4.5.

EXAMPLE The apparatus of the present invention will be explained in detail with reference to the embodiment shown below.The embodiment shown in FIG. In a reference beam correction radiation device for a surveying machine, in which the radiation direction of the reference beam is maintained constant by a compensator 3 with respect to the inclination of the device main body 6, in the optical path of the beam that has passed through the compensator 3, A correction lens system of a so-called Galilean telescope consisting of a combination of a convex lens system 4 and a single-lens system 5 is installed, and the overcorrection (2) by the compensator 3 is corrected by the magnification of the correction L/lens system 4.5. The light source 1 is installed at the image point distance of the radiation lens system 2, and the parallel beam from the radiation lens system 2 is compensated for by the radiation lens system 2. In the embodiment, the compensator 3 is a liquid compensator in which a liquid such as silicone oil is sealed in a transparent container whose upper and lower surfaces are perpendicular to the optical axis. It is preferable that the silicone oil has sufficient transparency to transmit light, an appropriate viscosity to absorb vibrations and maintain a stable and smooth liquid surface, an appropriate refractive index, and properties that do not change easily.The silicone oil has a refractive index of 1. .5 and is one of the preferred liquids.

FIG. 2 is an explanatory diagram showing the principle of the reference beam correction radiation device according to the present invention having the correction lens system shown in FIG. Since the liquid level (spray) of the liquid convenior/sweater 3 with respect to the optical axis 0-0 is also α, this liquid compensator 3 deflects the beam transmitted as a wedge-shaped medium with a wedge angle α. If the angle of deviation when a light ray passes through a liquid with this wedge angle α is β, β-(n-1)α However, n: There is a coefficient IVl, which is the refractive index of the liquid, at wedge 1. If the liquid is the silicone oil mentioned above, then its refractive index is 15, so it becomes β-0.5α due to bending, and 0.5α for the appropriate correction amount α.
There will be a shortage, and you will be left alone.

FIG. 3 is an explanatory diagram showing the principle of an embodiment of the correction lens system according to the present invention, which consists of a so-called Galilean telescope lens system consisting of a convex lens 4 and a concave lens 5. The light incident at an angle of β is transmitted to the concave lens 5.
shows that the light is emitted in the same direction with the optical axis 0-0 as the axis of symmetry with an angle α.

Here, if the magnification of the lens system is m, it is α-mβ, and the magnification m is expressed as m=fo/fe.

However, fO: color point distance of the entrance side lens system 4; e: focal length of the exit side lens system 5. Therefore, in FIG. 2, since the correction amount β by the liquid compensator 3 is insufficient, the correction lens system Convex/
By setting the magnification of the lens 4 and the concave lens 5 to m=α/゛β, the light exiting the convex lens 5 according to the principle shown in FIG. 3 is emitted at an angle α with respect to the optical axis 0-0,
The vertical line V-V is drawn, and the correction lens system 4.5 can compensate for the lack of correction 9β of the compensator 3. Therefore, in the case of β-0, 5α, the magnification of the correction lens system is m=2.

FIG. 4 shows another practical example, in which the light beam emitted from the light source 1 is emitted as a reference beam by the radiation lens system 2, as explained in the section of the above-mentioned operation. In the reference beam correction radiation device of the Yoriπ machine in which the radiation direction of the beam is maintained constant by the compensator 3, in the optical path of the beam that has passed through the compensator 3, there is a combination of a convex lens system 4 and a convex lens system 5. A correction lens system for the lens system of the Yurogebrel telescope is installed, and the magnification of the correction lens system is 4.5, according to the compensator 3 described in iii. It has a four-filter configuration that corrects excess or deficiency of the lli positive amount, and radiates the reference beam L vertically upward. The configurations of the light source 1, the radiation lens system 2, and the compensator 3 are the same as in the previous example.

FIG. 5 is an explanatory diagram showing the principle of the device of the present invention having the correction lens system shown in FIG. Since the inclination of the liquid level of the liquid compensator 3 with respect to the optical axis O-0 is also α, the liquid compensator 3 deflects the beam passing through it as a wedge-shaped medium with a wedge angle α.

Letting β be the angle of deviation when a light ray passes through a liquid with wedge angle α, β-(n-1) α However, there is a relationship where n is the refractive index of the spiky liquid, and the liquid is the first silicone oil. In this case, the refractive index is 1.5, so from formula 611 it becomes β-0.5α, and 0.5α for the appropriate correction amount α.
This means that there is a shortage.

FIG. 6 is an explanatory diagram showing the principle of a correction lens system consisting of a convex lens 4 and a convex lens 5. Light incident on the convex lens 4-.beta. This shows that the beam is emitted in the opposite direction with the axis of symmetry as the axis of symmetry.

Here, if the magnification of the L/Ns system is m, it is α-mβ, and the magnification In is expressed as m=fo/fe.

rO: Focal length of the entrance side lens system 4^11re: Origin distance of the exit side lens system 5 Therefore, in FIG. 5, since the correction amount β by the liquid compensator 3 is insufficient, the correction lens system By setting the magnification of the convex lenses 4 and 5 to m=α/β, the light exiting the convex lens 5 is directed in the opposite direction at an angle α with respect to the optical axis o-o according to the principle shown in FIG. The injection coincides with the vertical line V■, and the correction lens system 4
．． 5 compensates for the deficiency in the correction amount β of the compensator 3. Therefore, in the case of β-0, 5α, the magnification of the correction lens system is m=2.

Incidentally, if the amount of correction by the compensator becomes excessive, it can be corrected using the same principle by setting the magnification of the correction lens system to m<1.

The auxiliary lens system of the present invention is not limited to the liquid compensator 3 of the embodiment, but includes various compensators.
For example, the conventionally known technology described above as the prior art! This can be applied to a reference beam correction radiation device equipped with a suspended compensator, etc. In this case, the optical axis 0-0 of the device can be set not only in the vertical direction but also in the horizontal direction. Of course.

In the figure, the radiation lens system 2 is explained as having one convex lens, but of course it can also be made up of a combination of multiple (solid lenses). In some cases, a compensator 3 is interposed.

FIG. 7 shows the principle of an embodiment in which the correction lens system 4.5 also serves as a radiation lens system. In this case, the light source (quadrant F and exit side correction lens system 5 Since the reference beam I7 exiting from these correction lens systems 4.5 becomes parallel light, the radiation lens system 2 in the above embodiment can be omitted. In addition, in Fig. 7, the exit side correction lens system 5 is a concave lens system, but this is used as a convex lens system. If they are placed so that they match, a reference beam consisting of parallel light will be obtained in the same way.

Furthermore, a device of the present invention is provided with a dihedral reflector in the radiation optical path of the reference beam L of the device of the present invention, and is bent horizontally to radiate the beam.
A device provided with a two-sided reflector rotated by a motor, or a device consisting of a two-sided reflector unit 7 in which the two-sided reflector is removably attached to a mounting frame of the device main body 6 falls within the technical scope of the device of the present invention. Of course, it belongs to non-nai. In this case, the reference beef'', l-,
teeth? It will be a face-to-face or a water 17th day.

On the other hand, the device of the present invention has two light sources, one of which is a laser diode, a light emitting diode, etc. The type of light source shown in FIGS. 1 to 7 is a light source for evening and eve, and the light source is emitted as shown in FIG. 8(a).
Emit 1. Mo-) One is 11e! ~ e A type of parallel light source that uses a laser, etc. as a light source, and in Figure 8 (b), j
It emits parallel light 1 and 2 like water.

When using a parallel light source type as light source 1, as shown in Figure 9, the entrance side of the convex lens system is corrected, the exit side color point F of the lens system, and the exit side of the concave lens system are corrected. From the exit direction of the correction lens system 5 (, 1!+1, which is installed so that the focal point of the correction lens system 5 is aligned with the focal point of
Since the reference beam 1 emitted from the reference beam 5 is a parallel beam), the radiation lens system 2 can be omitted in the embodiment described above. In addition, in FIG. 9, the exit side correction lens system 5 is a concave lens system, but as shown in FIG.
If the focal point of the exit side correction lens system 5 on the incident direction side is set to match, the reference beam L consisting of parallel light will be 14.
Therefore, the radiation lens system 2 can be omitted.

According to the present invention, the device of the present invention having the configuration shown in “-1” emits the light rays emitted from the light source as a reference beam through the radiation lens system, and also adjusts the emission of the reference beam to the tilt of the device. In a reference beam correction radiation device for a surveying machine whose direction is maintained constant by a compensator, a correction lens system is installed in the optical path of the beam that has been made 1ffJ i8 by the compensator, and the correction by the compensator is performed by the magnification of the correction lens system. Since it has a configuration that further corrects the excess or deficiency of the amount, it is difficult for the conventional device to secure the desired correction amount due to its fundamental limitations, and in order to overcome this and achieve the purpose, In contrast, in the device of the present invention, a correction lens system consisting of a combination of a convex lens system and a concave lens system can be used in the same direction as the correction by the compensator. On the other hand, with a correction lens system consisting of a combination of convex lens systems and convex lens systems, it is possible to correct excesses and deficiencies in the opposite direction to the correction by the compensator. Even when the amount of correction cannot be obtained, it is possible to easily compensate for the excess or deficiency of the amount of correction with a simple configuration using a correction lens system. While the method adopted the method of reversing the correction direction by adding a reversing reflective member,
According to the configuration in which the correction lens system described in item 4ij of the present invention is a combination of convex lens systems and convex lens systems, the correction direction can be reversed at the same time as the compensator corrects the excess or deficiency of This has the effect of making it possible to obtain a reference beam emitting device that is simple in construction and inexpensive.Furthermore, in the device of the present invention, the correction lens system can also be configured as a radiation lens system, so the construction is even simpler and inexpensive. Furthermore, the device of the present invention not only compensates for excesses and deficiencies in the compensation amount in principle of the compensator, but also compensates for excesses and deficiencies in the compensation amount due to manufacturing errors. Since it can be used for adjustment purposes, it has the effect of improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing an embodiment of the device of the present invention, Fig. 2 is an explanatory diagram showing the principle of its optical system, and Fig. 3 is an explanatory diagram showing the principle of the operation of its main parts. 4 is a schematic explanatory diagram longitudinally showing another embodiment of the device of the present invention, FIG. 5 is an explanatory diagram showing the working mode of the optical system in principle, and FIG. Explanatory diagram showing the mode of action in principle, No. 7
8(a) and (b) are explanatory diagrams showing embodiments of the light source in the device of the present invention, and FIG. 9 is a schematic explanatory diagram showing another embodiment longitudinally. FIG. Fig. 10 is an explanatory diagram showing the principle of another embodiment of the device, and Fig. 10 is an explanatory diagram showing the principle of still another embodiment of the main part of the device of the present invention. 1...Light source emission lens system, liquid compensator, entrance lens 1 correction lens system, exit side correction lens system Apparatus main body Fig. ■ Fig. Fig. 10

Claims (5)

[Claims] (1) In a reference beam correction radiation device for a surveying machine, in which a radiation lens system emits a light beam emitted from a light source as a reference beam, and a compensator maintains the radiation direction of the reference beam constant with respect to the tilt of the device, the compensator A reference beam correction radiation device for a surveying machine, comprising a correction lens system installed in the optical path of the beam passing through the sweater, and correcting excess or deficiency of the amount of correction by the compensator based on the magnification of the correction lens system. (2) In the apparatus according to claim (1), the correction lens system is composed of a combination of a convex lens system and a concave lens system, and is configured to correct excess or deficiency in the same direction as the correction by the compensator. Mechanical reference beam correction radiator (3) In the device according to claim (1), the correction lens system is composed of a combination of a convex lens system and a convex lens system, and is configured to correct excess or deficiency of the amount of correction by the compensator and at the same time reverse the correction direction. Reference beam correction radiation device for surveying equipment consisting of (4) In the device according to claim (1), (2) or (3), the reference beam correction radiation device for a surveying machine is characterized in that the correction lens system also serves as a radiation lens system. (5) Claims (1), (2), (3) or (4)
), wherein the correction lens system is provided as an adjustment lens system for compensating for excess or deficiency in the amount of correction due to manufacturing errors of the compensator.