JPH08219765A - Point-set light irradiator - Google Patents

Abstract

PURPOSE: To provide a point-set irradiator wherein visual confirmation of the direction of an optical axis of a measuring device is easily performed from a target side in simple constitution. CONSTITUTION: An optical axis O is included, first areas 1, 2 of the optical axis to a predetermined height and a second area 1 outwardly succeeding from the outer edge of the first areas are constituted. Either the first area or the second area has a function as a collimator, and the other thereof has an optical system 10 for performing the function of non-collimator. Visible light from a light source 3 is constituted to emit toward target set at a measuring point as light divided into a high intensity area and a low intensity area by using the optical system 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light irradiation device for setting points of a surveying instrument.

[0002]

2. Description of the Related Art Conventionally, a surveying instrument has been used at a construction site or the like to set an actual position (point) based on a drawing or the like. For surveying, a surveying device installed at a reference position observes a position setting target located at a survey point to set points. The target is provided with a corner cube, and the light of the semiconductor diode emitted from the surveying device is configured to return to the surveying device again through the corner cube provided on the target side, and based on the phase difference of the light. The distance from the surveying instrument to the target has been calculated. Furthermore, the surveying device is provided with means for displaying the rotation angle from the reference direction, and guides the person holding the target so that the target is located at a position corresponding to the target position on the drawing, I was making settings.

However, since the distance between the target and the surveying instrument is relatively large, even if the target point and the direction of the target are greatly different, the person holding the target visually recognizes the orientation of the surveying instrument. Things are difficult,
The person on the target side moved the target according to the human voice of the surveying instrument side or instructions by radio.

In order to improve the inefficient situation as described above,
There was a demand for a device that allows the direction of the surveying device to be easily visually recognized on the target side. As such a device, a device has been proposed in which light of different lighting states can be seen depending on whether the target is off to the left or right of the target point. This device is configured to emit lighting light or blinking light within a predetermined angle range on each of the left and right sides of the optical axis of the surveying device. By using this device, the human being on the target side can sufficiently approach the optical axis without any guidance from the operator of the surveying device.

[0005]

However, in the case of the above-mentioned device, two lights are required because the light is turned on at one side of the optical axis and the light is blinked at the other side. Further, a driving circuit for driving the light sources by different methods is required. As a result, the mechanism and the drive circuit become complicated, and the device becomes large. In addition, normally, the point setting is an outdoor work, and a battery is used as a power source of the surveying instrument, but in a device using a plurality of light sources, power consumption becomes large, which is also a problem.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a light irradiation device for point setting, which has a simple structure and makes it possible to easily visually recognize the direction in which a surveying instrument is facing from the target side. Has an aim.

[0007]

Therefore, the point setting light irradiating device of the present invention includes an optical axis and includes a first region from the optical axis to a predetermined height and a first region of the first region. A second region continuing from the outer edge to the outside, one of the first and second regions has a function as a collimator, and the other of the first and second regions has a non-collimator function. A visible light from a light source is provided so that the visible light from the light source is projected toward a target placed at a measurement point as light divided into a high intensity region and a low intensity region by using the optical system. It is characterized by being configured. In this case, the second region may be configured to project light from the light source as parallel light, and the first region may be configured to project light from the light source as divergent light. Further, the first
The visibility can be increased by configuring the light passing through the region of 1 and the light passing through the second region of different colors.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic side view showing the structure of a light irradiation device 10 of the first embodiment. This device is not shown,
It is attached to a known lightwave distance measuring device and is for facilitating visual recognition of the direction of the distance measuring device from the target side.

As shown in FIGS. 1 and 2, the light irradiation device 10 has a collimating lens 1, a concave lens 2 and a light emitting diode 3. The diameter of the concave lens 2 is set to be smaller than the diameter of the collimator lens 1, and the collimator lens 1 and the concave lens 2 are bonded together with their optical axes O aligned. That is, the collimator lens 1 is the first optical system, and the collimator lens 1 and the concave lens 2 are
The synthetic optical system of 1 constitutes the second optical system, and both are rotationally symmetrical with respect to the optical axis O. Further, the light emitting diode 3 is arranged on the optical axis such that the light emitting point is aligned with the focal position of the collimator lens 1 (first optical system). According to this configuration, the light that is emitted from the light emitting diode 3 and that does not pass through the concave lens 2 but directly enters the collimating lens 1 (that is, the light that passes through the first optical system)
It becomes parallel rays and advances to the target side (left side in the figure). Light that has entered the collimator lens 1 via the concave lens 2 (light that has passed through the second optical system) becomes divergent light within a predetermined range and travels toward the target side. The light irradiation device 10
The optical axis O is set to be substantially parallel to the optical axis of the optical distance measuring device.

FIG. 3 shows the target T from the light irradiation device 10.
It is a figure which shows the path | route of the light irradiated toward. As shown in FIG. 3, the light emitted from the light irradiation device 10 has a divergent light component and a parallel light component that diverge within a predetermined range. Therefore, the target is a region where divergent light can be seen (region where relatively weak light is received) A, a region where parallel light can be seen (region where relatively strong light is received) B, and a region where light from the light irradiation device 10 cannot be seen at all. It will be located in either area of C. Therefore, the deviation from the light irradiation device 10 can be known based on the light receiving state. Furthermore, if the surface of the concave lens 2 is colored, the difference between the areas A and B can be distinguished not only by the light amount but also by the color. In this case, the colored light does not have to be limited to the area A, and it is easy to use only the area B or both the areas A and B.

Further, the present invention is not limited to the above-mentioned cemented lens, but any structure may be used as long as it emits a parallel light beam in the peripheral portion and divergent light in which the central portion diverges in a predetermined range.
Other forms of optical element may be used. Other examples will be described below.

FIG. 4 shows a light irradiation device 20 of a second embodiment which uses an optical system of a form different from that of the first embodiment.

In the second embodiment, the peripheral portion is formed as the first collimating lens 4 having a predetermined focal length f, and the central portion including the optical axis O has a second collimating lens having a focal length longer than that of the first collimating lens. The lens formed as 5 is used as an optical element. That is, the curvature of the refracting surface of the second collimating lens is larger than that of the refracting surface of the first collimating lens 4. The light emitting diode 3 is provided at the focal position of the first collimator lens 4.

Also in the second embodiment, as in the first embodiment, the light emitted from the light irradiation device 20 includes parallel light and divergent light that diverges within a predetermined range. Therefore, on the target side, the positional deviation of the light irradiation device 20 from the optical axis O can be easily visually recognized. Further, as described in the first embodiment, by coloring one or both of the first collimating lens and the second collimating lens, it becomes possible to more easily visually recognize the deviation from the optical axis O. From the viewpoint of emphasizing the intensity of light, it is desirable that the second collimator lens that emits divergent light be a colored lens.

FIG. 5 is a view showing the light irradiation device 30 of the third embodiment. In the third embodiment, the reflecting mirror 31 is used to emit parallel light flux and divergent light. The reflecting mirror 31 is composed of a second reflecting mirror 33, which is a parabolic mirror formed in the central portion including the optical axis O, and a first reflecting mirror 32 formed outside the second reflecting mirror 33. The first reflecting mirror 32 is a part of a parabolic mirror whose optical axis O coincides with the optical axis O of the second reflecting mirror 32 and which has a predetermined focal length F. Also,
The focal length of the second reflecting mirror 33 is set longer than that of the first reflecting mirror 32, and both the first reflecting mirror 32 and the second reflecting mirror 33 are rotationally symmetrical about the optical axis O. In the third embodiment, the light emitting diode 3 as the light source is arranged at the focal position of the first reflecting mirror 32. Therefore, the light irradiation device 3
The emitted light from 0 includes the parallel light reflected by the first reflecting mirror 32 and the divergent light reflected by the second reflecting mirror 33 and diverging in a predetermined range. The displacement of the device 30 from the optical axis O can be easily visually recognized. Also in the third embodiment, by coloring one or both of the first reflecting portion 32 and the second reflecting portion 33,
The visual recognition on the target side becomes easier.

In each of the above embodiments, the central part of the optical system (lens or reflecting mirror) projects divergent light and the peripheral part projects parallel light. However, there is no need to limit to this configuration, and it is sufficient if the strong light and the weak light can be distinguished and observed at the measurement point side. Therefore, if the position of the measurement point is always within a certain range, the same effect can be obtained even if the light diverged after the focus is once focused reaches the range. In this case, it is possible to adopt a configuration in which parallel light is projected on either the peripheral portion or the central portion, and light that focuses once before the measuring point is projected on the other.

Further, it is not necessary to limit the combination of the lens and the reflection mirror only, and the lens and the reflection mirror may be arbitrarily combined as long as the condition that the difference in intensity can be observed on the measurement point side is satisfied.

[0018]

As described above, according to the point setting light irradiating device of the present invention, a single light source can be used at a low cost and with a simple structure.
The positional deviation from the optical axis can be known. Furthermore, according to the present invention, not only in the left-right direction, but 360 degrees around the optical axis.
Similarly, it is possible to know the positional deviation from the optical axis in the range of degrees.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a point setting light irradiation device of a first embodiment.

FIG. 2 is a front view showing a combination of lenses of the point setting light irradiation device of the first embodiment.

FIG. 3 is a diagram showing a light irradiation range of a point setting light irradiation device.

FIG. 4 is a schematic side view showing the configuration of a point setting light irradiation device according to a second embodiment.

FIG. 5 is a schematic side view showing the configuration of a point setting light irradiation device of a third embodiment.

[Explanation of symbols]

 1 1st lens 2 2nd lens 3 Light source 4 1st collimating lens 5 2nd collimating lens 32 1st reflection part 33 2nd reflection part

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 8, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Patent application title: Point setting light irradiation device

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (9)

[Claims] 1. A first region including an optical axis, the first region extending from the optical axis to a predetermined height, and a second region extending from an outer edge of the first region to the outside. One of the two areas has a function as a collimator, and the other of the first and second areas has an optical system that performs a non-collimator function. make use of,
A point setting light irradiation device configured to project light as a light divided into a high intensity region and a low intensity region toward a target placed at a measurement point. 2. The point setting light irradiation device according to claim 1, wherein the second region functions as a collimator, and the first region projects light from the light source as divergent light. 3. The first region having a positive power in the second region
3. The point setting light irradiating device according to claim 1, wherein the first region is composed of the first lens and a second lens having a predetermined power. 4. The point setting light irradiating device according to claim 3, wherein the second lens has a negative power. 5. The first region comprises a positive lens having a first focal length, and the second region comprises a positive lens having a second focal length different from the first focal length. The point setting light irradiation device according to claim 1 or 2, characterized in that. 6. The first area is a parabolic mirror having a first focal length, and the second area is a parabolic surface having a second focal length different from the first focal length. It is a mirror, The point setting light irradiation device of Claim 1 or 2 characterized by the above-mentioned. 7. The light passing through the first region and the light passing through the second region have different colors.
7. The point setting light irradiation device according to any one of 1 to 6. 8. The first region has a first focal length,
The second region has a second focal length different from the first focal length, and the light source is located at a focal position of either the first region or the second region. ,
The point setting light irradiating device according to claim 1. 9. The point setting light according to claim 8, wherein the first focal length is longer than the second focal length, and the light source is located at a focal position of the second region. Irradiation device.