JP2784933B2 - A surveying machine with a visible light laser diode built into the lens barrel - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a surveying machine that projects a visible laser beam used for construction surveying on a target.

[Conventional technology]

Conventionally, in a surveying machine that projects a visible laser beam onto a target, a HeNe gas laser was used, and a laser beam projected from a laser oscillation tube was projected onto the target through a lens barrel to determine a survey point. . And in this case, He
Since the oscillation tube of the Ne gas laser is large, the oscillation tube is generally provided outside the lens barrel, a laser beam is guided into the lens barrel by an optical system, and laser light is projected from the lens barrel.

Japanese Patent Application Laid-Open No. 55-82011 discloses a surveying instrument using a laser beam. The surveying instrument is an example of a surveying instrument mainly using an infrared laser which is not visible light, It does not disclose any means for solving the problem of downsizing in the case of large-capacity laser light such as a laser. Accordingly, in the case of an infrared laser, a large-capacity output is required so that the infrared laser can be visually recognized. Therefore, there is no disclosure of a configuration for achieving the purpose of miniaturization when a visible laser is used. Although there is a disclosure in the publication of using a visible light laser, the technology at that time did not have the idea of solving the object of the present invention, so that it was significantly different from the configuration of the present invention.

[Problems to be solved by the invention]

The first problem with the above-mentioned conventional surveying machine that projects a laser beam onto a target is that the entire machine becomes large because the oscillation tube is large, and handling and operation of the machine are inconvenient and difficult. is there.

In addition, the HeNe gas laser requires a high voltage of about 1200 V for its oscillation.
In addition to the use of a power unit, a power unit (a booster) must be used in combination, and thus there is a problem that the handling of the machine becomes more inconvenient.

Further, as described above, since it is necessary to guide the laser beam into the lens barrel by the optical system from the oscillation tube provided outside, not only the structure of the optical system becomes complicated and expensive, but also the projection direction of the laser light is increased. There was often the problem of errors.

Conventionally, only a large visible light laser diode has been used, so that a mechanism for enabling the peripheral rotation of a telescope such as a theodolite cannot be provided.

[Means for solving the problem]

Therefore, the present invention provides a theodolite that projects laser light from the lens barrel of a telescope, a surveying machine such as a level, and a visible light laser diode that emits a visible laser beam at the focal position of the optical system in the lens barrel of the telescope. A drive circuit for driving the visible light laser diode and a battery serving as a power supply are integrally incorporated in the lens barrel, and a beam splitter is arranged in the optical path of the visible light laser diode of the optical system in the lens barrel, An object of the present invention is to provide a surveying machine for projecting a visible laser beam from a lens barrel of a telescope, characterized in that a beam spot of a visible laser beam projected on a target is formed on a reticle to enable observation.

[Action]

According to the present invention, in a theodolite for projecting laser light from a barrel portion of a telescope, a surveying machine for level, etc., a configuration in which a visible laser diode emitting a visible laser beam is provided at a focal position of an optical system in a barrel of a telescope. The optical system for guiding the laser beam to the focal position is completely unnecessary, and the visible laser beam is projected onto the target as a beam spot by the lens group of the optical system in the lens barrel that also serves as a telescope for collimation. can do.

In addition, the drive circuit for driving the visible light laser diode and the battery that is the power supply are integrated into the lens barrel, so that all elements related to emission and projection of the visible light laser beam are integrated. Since it is built into the lens barrel, it is not necessary to run the power cord or handle a separate power unit at all, and the conventional theodolite shown in FIG. 4 and the telescope mirror of the level shown in FIG. It can be used as it is as a cylinder,
In particular, even when rotating with the support legs on both sides like the theodolite telescope shown in FIG. 4, the entire circumference of the telescope can be rotated, and the visible laser beam can be emitted without impairing the function of the conventional theodolite at all. It can be used as a surveying machine that projects from the barrel of a telescope.

In addition, since a beam splitter is arranged in the optical path of the visible light laser diode of the optical system in the lens barrel, the beam spot of the visible laser beam projected on the target is formed on the reticle so that the beam spot can be observed. With the configuration in which the beam spot of the visible laser beam projected on the target is focused on the reticle and made visible, the position of the beam spot of the visible laser beam projected on the target can be accurately determined without error through the optical system in the lens barrel. You can see it.

〔Example〕

Hereinafter, the surveying machine according to the present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a main part of the present invention. Reference numeral 1 denotes a lens barrel, 2 denotes a projection lens, 3 denotes an inner cylinder for focus adjustment, and 4 denotes a window glass. The configuration of these projection optical systems is conventionally known as an optical system in a lens barrel of a telescope. Reference numeral 11 denotes a visible light laser diode, which is provided at the focal position of the optical system in the barrel of the telescope as shown in the figure, and is driven by a drive circuit including a very small circuit board 12 on which a few electronic parts 12 'are mounted. Can be. Reference numeral 13 denotes a battery serving as a power source. For example, a battery of about 6 V composed of four 1.5 V batteries is sufficient, and can be housed integrally in the lens barrel 1. 9 is a battery cover, 10 is a battery cover set screw, and 13 'is a power cord.

In the above configuration, the laser light emitted from the visible light laser diode 11 is adjusted by moving the projection lens 2 by the inner cylinder 3 in the lens barrel 1 so that the beam spot P Can be collected. By installing an observation telescope in parallel with the lens barrel 1, the light-gathering state and the projection position of the beam spot P on the target A can be confirmed on the surveying machine side.

In the embodiment shown in FIG. 2, the focusing state and the projection position of the beam spot P on the target A are made visible by the lens barrel of the surveying machine. In this case, the optical system inside the lens barrel of the telescope is used. A beam splitter 6 for dividing a focal position into a projection side and a light receiving side is arranged in an optical path of the system, and the visible light laser diode 11 for emitting a visible laser beam is provided at a focal position on the projection side, and a focal position on the light receiving side. Is provided with a focusing plate 7, and the visible laser light emitted from the visible light laser diode 11 is reflected by the beam splitter 6, and then projected toward the target A by the projection lenses 2 'and 5 at the same time. The light incident on the projection lenses 2 ′ and 5 from the target A and passing through the beam splitter 6 is imaged on the reticle 7, and observed through the eyepiece 8. The configuration is such that the spot P can be observed. In FIG. 2, members denoted by the same reference numerals as those in FIG. 1 indicate the same members in FIG. 1, and 2 'denotes a projection provided in the inner cylinder 3 with respect to the projection lens 5 (front group). The lens (rear group).

In this embodiment, since the visible light laser diode 11 emits monochromatic light, if the beam splitter 6 is configured to reflect only that wavelength, the target A
The amount of light passing through the beam splitter 6 from the direction is increased, and the observation of the target A can be made easier.

Further, in the embodiment shown in FIG. 2, the laser light emitted from the visible light laser diode 11 passes through the beam splitter 6 and is focused on the target A by the projection lenses 2 'and 5, while the laser beam of the target A The observation of the spot P may be performed by observing the light reflected by the beam splitter 6 through the eyepiece 8.

Further, in the positional relationship between the visible light laser diode 11, the beam splitter 6, and the reticle 7 shown in FIG. 2, the beam splitter 6 is
It may be constituted by a dichroic prism 6 '.

Also, as shown in FIG. 6, in the embodiment shown in FIGS. 1 and 2, for example, a compensator 14 having a known structure, such as a conventionally known automatic level, is mounted inside the lens barrel 1. By arranging the laser beam in the projection optical path, the direction of the laser beam to be projected can always be maintained in a fixed direction with respect to a small tilt error of the lens barrel.

〔effect〕

As described above, according to the surveying machine that projects the visible laser beam from the barrel section of the telescope according to the present invention, the theodolite that projects the laser beam from the barrel section of the telescope, a surveying machine such as a level, emits a visible laser beam. Since the visible laser diode is provided at the focal position of the optical system in the barrel of the telescope, there is no need for an optical system to guide the laser light to the focal position, and the mirror is also used as a telescope for collimation. There is an effect that a visible laser beam can be projected as a beam spot on a target by a lens group of the in-cylinder optical system.

In addition, the drive circuit for driving the visible light laser diode and the battery that is the power supply are integrated into the lens barrel, so that all elements related to emission and projection of the visible light laser beam are integrated. Since it is built into the lens barrel, it is not necessary to run the power cord or handle a separate power unit at all, and the conventional theodolite shown in FIG. 4 and the telescope mirror of the level shown in FIG. It can be used as it is as a cylinder,
In particular, even when rotating with the support legs on both sides like the theodolite telescope shown in FIG. 4, the entire circumference of the telescope can be rotated, and the visible laser beam can be emitted without impairing the function of the conventional theodolite at all. There is an effect that a surveying machine for projecting from a lens barrel of a telescope can be provided.

In addition, a beam splitter is arranged in the optical path of the visible light laser diode of the optical system in the lens barrel, and the beam spot of the visible laser beam projected on the target is imaged on the reticle to enable observation. With the configuration in which the beam spot of the visible laser beam projected on the target is imaged on the reticle and made visible, the position of the beam spot of the visible laser beam projected on the target is There is an effect that it can be visually recognized accurately without error through the system.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view schematically showing an essential part of an embodiment of a surveying instrument in which a visible light laser diode is incorporated in a lens barrel, and FIG. 2 is a view showing a visible light laser diode according to the present invention in a lens barrel. FIG. 3 is a partial vertical sectional side view schematically showing a main part of an embodiment of a surveying machine incorporated in FIG. 3, FIG. 3 is a schematic side view showing a part of another embodiment of the embodiment shown in FIG. FIG. 4 is a perspective view showing a conventional transit, FIG. 5 is a perspective view showing a conventional level, and FIG. 6 is a perspective view showing FIGS.
FIG. 10 is a schematic partial longitudinal sectional view showing a main part of another embodiment of the figure. A: Target P: Beam spot 1: Lens barrel 2: Projection lens 2 ': Projection lens (rear group) 3: Inner cylinder 4: Window glass 5: Projection lens (front group) 6: Beam splitter 6': Dichroic・ Prism 7: Focus plate 8: Eyepiece 9: Battery cover 10: Battery cover set screw 11: Visible light laser diode 12: Drive circuit board 12 ': Electronic parts 13: Power supply battery 13': Power supply cord 14: Compensator

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-82011 (JP, A) JP-A-59-191405 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01C 1 / 02,5 / 00,15 / 00

Claims (1)

(57) [Claims] In a surveying machine such as a theodolite and a level for projecting a laser beam from a barrel of a telescope, a visible laser diode emitting a visible laser beam is provided at a focal position of an optical system in a barrel of the telescope. A drive circuit for driving the visible light laser diode and a battery serving as a power supply are integrally incorporated in the lens barrel, and a beam splitter is arranged in the optical path of the visible light laser diode of the optical system in the lens barrel, A surveying machine for projecting a visible laser beam from the barrel of a telescope, characterized in that the beam spot of the visible laser beam projected on the target is imaged on a reticle to enable observation.