JP2025004506A - Guide light irradiation device - Google Patents

Abstract

A guide light emitting device is provided that has a simple configuration, suppresses a decrease in the amount of light, and is capable of emitting a guide light over a wide range.
[Solution] The guide light irradiation optical system of the guide light irradiation device includes a plurality of light sources 12a, 12b, 12c, which are broadband light sources that emit light in a wide band, and the optical axes 13a, 13b, 13c of the plurality of light sources are arranged in the same vertical or horizontal plane, and irradiation lenses 14a, 14b, 14c are provided on each of the optical axes, and a spectral plate 15 is provided between the irradiation lenses and the light sources, and a color-emitting element 17 is formed on the spectral plate, and the color-emitting element has at least two regions 17a, 17b with different spectral characteristics, the boundaries of the regions are included in the plane, and the spectral plate and the light source are configured to be located in the vicinity of the focal position of the irradiation lens, and the light emitted from the plurality of light sources is colored by the regions, irradiated and collected by the irradiation lens, and irradiated as guide light containing at least two colors of light.
[Selected figure] Figure 3

Description

The present invention relates to a guide light irradiation device that emits guide light to guide survey workers.

A guide light irradiation device that emits guide light is known as a device for guiding a construction worker during construction work.

The guide light is a different color on the left and right sides of the collimation axis, and is irradiated toward the staking point. The staking worker visually recognizes the guide light and determines the direction to move by identifying the color, and is guided to the staking point by moving to the boundary position between the left and right colors.

Conventionally, a guide light irradiation device has a light source and a right-angle mirror arranged opposite each other. The two light sources emit light of different colors, and the light is incident on two perpendicular reflecting surfaces of the right-angle mirror. The two colors of light reflected by the reflecting surfaces are emitted as guide light with a boundary. An example of a guide device is shown in Patent Document 1.

Conventional guide light irradiation devices require two light sources of different colors and a right-angle mirror, and because they require a large number of parts and the light sources are placed opposite each other, they take up a large amount of space. Furthermore, the task of aligning the two light sources and the right-angle mirror is cumbersome.

In addition, in surveying and construction work, it may be desirable to expand the illumination range of the guide light. For example, in places where there is a difference in elevation at the surveying and construction site, expanding the illumination range of the guide light in the vertical direction will contribute to improving workability so that the worker does not lose sight of the guide light.

Conventionally, there are devices that expand the illumination range of guide light both vertically, as shown in Patent Document 1 and Patent Document 2.

Patent document 1 discloses that multiple irradiators are used to irradiate guide light that is a combination of two colors of light, and the irradiation range is expanded by changing the angle of the irradiation direction of the irradiators, while patent document 2 discloses that the light beam is diffused in the vertical direction by a cylindrical lens.

Conventionally, multiple irradiators are used, which increases the number of parts and complicates the structure, and also requires position adjustment between the irradiators. In addition, when the light beam is diffused vertically using a cylindrical lens, the amount of light decreases, resulting in poor visibility when working at a distance.

JP 2020-165839 A JP 2015-40831 A

The present invention provides a guide light irradiation device that has a simple configuration, is easy to manufacture, and does not cause a decrease in the amount of light when the irradiation range is expanded.

The present invention relates to a guide light irradiation device that irradiates guide light to indicate the aiming direction to a surveying worker, the guide light irradiation optical system of the guide light irradiation device includes multiple light sources, the light sources are broadband light sources that emit broadband light, the optical axes of the multiple light sources are arranged in the same vertical or horizontal plane, an irradiation lens is provided on each optical axis, and a spectral plate is provided between the irradiation lens and the light source, a coloring element is formed on the spectral plate, the coloring element has at least two areas with different spectral characteristics, the boundaries of the areas are included in the plane, the spectral plate and the light source are configured to be located near the focal position of the irradiation lens, and the light emitted from the multiple light sources is colored by the areas, irradiated and collected by the irradiation lens, and irradiated as guide light containing at least two colors of light.

The present invention also relates to a guide light irradiation device in which the light source is a white LED that emits visible white light.

The present invention also relates to a guide light irradiation device in which the spectral plate has the color-developing elements formed on a transparent substrate.

The present invention also relates to a guide light irradiation device in which the spectral plate has the color-developing elements formed on the reflecting surface of a reflector.

The present invention also relates to a guide light irradiation device in which the spectral plate has an elongated rectangular shape through which light from the multiple light sources passes, the region is divided into two along the short side direction, and color-producing elements with different spectral characteristics are provided in the divided portion to form two regions, and the two regions form a boundary extending in the longitudinal direction of the transparent substrate, and the boundary is configured to be included within the plane.

The present invention also relates to a guide light irradiation device in which the spectral plate is made up of small spectral plates arranged on the optical axes of a plurality of the light sources in correspondence with the light sources, at least two regions are formed on the small spectral plates, and coloring elements having different spectral transmittances are provided in each region, and the boundaries of the regions are included in the plane.

The present invention also relates to a guide light irradiation device in which the optical axes of the light sources are inclined at a predetermined angle in the direction in which the light irradiating the light expands.

The present invention also relates to a guide light irradiation device in which a guide light irradiation unit is constituted by the irradiation lens, the small spectrometer, and the light source, which are arranged on the optical axis of the light source, and the guide light irradiation optical system is composed of a plurality of guide light irradiation units, one guide light irradiation unit has a reference optical axis parallel to the collimation direction, and the optical axes of the other guide light irradiation units are inclined at a predetermined angle with respect to the reference optical axis in the direction in which the irradiated light expands.

The present invention further relates to a guide light irradiation device in which a guide light irradiation unit is constituted by the irradiation lens, the small light plate, and the light source arranged on the optical axis of the light source, the guide light irradiation optical system is composed of five guide light irradiation units, one guide light irradiation unit has a reference optical axis parallel to the collimation direction, two guide light irradiation units are provided in a vertical plane including the reference optical axis and are symmetrical from top to bottom with respect to the reference optical axis, and two guide light irradiation units are provided in a horizontal plane including the reference optical axis and are symmetrical from left to right with respect to the reference optical axis, a guide light is formed by a collection of light emitted from the five guide light irradiation units, each of the small light plates is divided into regions so that the guide light has a boundary included in the vertical plane and a boundary included in the horizontal plane, and coloring elements are formed in the regions.

According to the present invention, there is provided a guide light irradiation device that irradiates guide light to indicate the aiming direction to a surveying worker, and the guide light irradiation optical system of the guide light irradiation device includes a plurality of light sources, the light sources are broadband light sources that emit broadband light, the optical axes of the plurality of light sources are arranged in the same vertical or horizontal plane, an irradiation lens is provided on each optical axis, and a spectral plate is provided between the irradiation lens and the light source, a coloring element is formed on the spectral plate, the coloring element has at least two regions with different spectral characteristics, the boundaries of the regions are included in the plane, the spectral plate and the light source are configured to be located near the focal position of the irradiation lens, and the light emitted from the plurality of light sources is colored by the regions, irradiated and collected by the irradiation lens, and irradiated as guide light containing at least two colors of light. This provides the excellent effect of providing a simple configuration, irradiating a wide area, and suppressing a decrease in the amount of light.

1 is an explanatory diagram illustrating an overview of a guide light emitting device according to a first embodiment; 1A is an explanatory diagram showing an irradiation state of a guide light at a short distance, and FIG. 1B is an explanatory diagram showing an irradiation state of a guide light at a long distance. FIG. 2A is a schematic diagram of a guide light emitting optical system in the first embodiment, and FIG. 2B is a diagram showing a cross section of a light beam in the guide light emitting optical system. FIG. 4 is an explanatory diagram of a spectroscopic plate in the first embodiment. 3 is an explanatory diagram of a basic configuration of the guide light irradiation optical system. FIG. 4 is a graph showing the spectral characteristics of a light source, the transmittance characteristics of a dichroic film, and the spectral characteristics of light after passing through the dichroic film in this embodiment. 1A is a schematic diagram of a guide light emitting optical system according to a second embodiment of the present invention, and FIG. 1B is a diagram showing a cross section of a light beam in the guide light emitting optical system. 13A is a schematic diagram of a guide light emitting optical system according to a third embodiment, and FIG. 13B is a diagram showing a cross section of a light beam in the guide light emitting optical system. FIG. 1 is an explanatory diagram of a coloring element having a gradation of color or brightness. FIG. 13 is a schematic diagram illustrating a guide light irradiation optical system according to a fourth embodiment. FIG. 11 is a view taken along the arrow A in FIG. FIG. 11 is a view taken along the arrow B in FIG. 13A and 13B are diagrams showing cross sections of light beams in a guide light irradiation optical system according to a fourth embodiment.

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is an explanatory diagram showing an overview of the guide light irradiation device 1 according to this embodiment, and also shows the state at a survey work site with an elevation difference.

The guide light irradiation device 1 is attached to the top surface of the total station 2, and the optical axis of the guide light irradiation device 1 is set parallel to the collimation optical axis of the total station 2.

In Figure 1, 3 indicates a pole on which a prism 4 is mounted. Figure 1 shows the pole 3 installed at a staking point 5.

The total station 2 is installed at a known point, and the sighting direction is set to the survey point 5.

Guide light 7 is emitted from the guide light irradiation device 1 toward the pole 3.

The guide light 7 is expanded vertically, and the cross section of the light beam is an ellipsoid with the major axis in the vertical direction. The guide light 7 is colored in different colors on the left and right sides with the optical axis of the guide light 7 as the boundary. For example, when viewed from the guide light irradiation device 1 side, the right side 7a of the guide light 7 is blue light, and the left side 7b is red light. In the figure, the boundary between the red light and the blue light is indicated by 7e.

When guiding a construction worker during construction work, if the construction worker recognizes the guide light 7 as blue, it can be determined that the worker is to the left of the construction point 5, and the worker is guided to the construction point by moving to the right (Figure 2 (A)).

In a staking work site with a difference in elevation, for example when there is a depression in the ground, when the worker moves across the depression, the worker also moves downward. In this embodiment, the guide light 7 expands vertically, so even if the worker moves downward, the worker does not leave the irradiation range of the guide light 7 and guidance continues (Figure 2 (B)).

The first embodiment will be described with reference to Figures 3(A), 3(B), and 4.

Figure 3(A) is a schematic diagram showing the main parts of the optical system of the guide light irradiation device 1. Note that Figure 3(A) shows an elevational view of the optical system, with the upper side in the figure indicating the top, the lower side indicating the bottom, and the right side indicating the front.

In FIG. 3A, 11 indicates a guide light irradiation optical system. The guide light irradiation optical system 11 has a plurality of light sources 12 and a plurality of irradiation lenses 14 corresponding to the light sources 12 on the optical axis 13 of the light sources 12.

In this embodiment, three light sources 12a, 12b, and 12c are provided, and irradiation lenses 14a, 14b, and 14c are provided on the optical axes 13a, 13b, and 13c of the light sources 12a, 12b, and 12c, respectively. In addition, a common spectrometer 15 is provided between the light sources 12a, 12b, and 12c and the irradiation lenses 14a, 14b, and 14c, close to the light sources 12a, 12b, and 12c.

The light sources 12a, 12b, and 12c are provided so that the optical axes 13a, 13b, and 13c are positioned on the same vertical plane, and the light sources 12b and 12c are arranged symmetrically above and below the optical axis 13a. Furthermore, the optical axes 13b and 13c are inclined at a predetermined angle with respect to the optical axis 13a. Here, the optical axis 13a is set parallel to the collimation optical axis.

An irradiation lens 14a is provided on the optical axis 13a, and the optical axis of the irradiation lens 14a coincides with the optical axis 13a. The focal position of the irradiation lens 14a is set to be at the position of the spectrometer 15 or the position of the light source 12a, or near the position of the spectrometer 15 or near the position of the light source 12a. Note that the vicinity of the focal position of the irradiation lens 14a includes the focal position.

Similarly, irradiation lenses 14b and 14c are provided on the optical axes 13b and 13c, and the optical axes of the irradiation lenses 14b and 14c coincide with the optical axes 13b and 13c, respectively. In addition, the focal positions of the irradiation lenses 14b and 14c are set to be at the position of the spectroscopic plate 15 or the position of the light sources 12b and 12c, or near the position of the spectroscopic plate 15 or near the position of the light sources 12b and 12c.

Figure 5 shows the basic configuration of the illumination lens, the spectroscopic plate, and the light source in this embodiment, and shows a plan view of the portion related to the light source 12a in Figure 3. Note that the light sources 12b and 12c are similar to the light source 12a, so a description of them will be omitted.

The light source 12a is a broadband light source that emits light having a wide band of wavelengths, for example an LED that emits visible white light.

The spectral plate 15 has color elements 17 (17a, 17b) formed on the surface of a transparent substrate 16 (see FIG. 4), and the color elements 17 have optical characteristics in which the regions 17a, 17b on the left and right of a boundary 17e passing through the optical axis 13a have different spectral transmittances. For example, a dichroic film is used as the color elements 17. Furthermore, the boundary 17e, i.e., the boundary line, is set to be located on a vertical plane including the optical axes 13a, 13b, and 13c.

It is also possible to form no dichroic film on either one of the regions 17a and 17b, for example, on region 17b, or to form only an AR coating. In this case, the guide light will be two colors, red and white.

In the above description, in FIG. 5, the color-developing element 17 is provided on the surface of the spectrometer 15 facing the illumination lens 14a, but it may be provided on the surface of the spectrometer 15 facing the light source 12a.

The color-producing element 17 is a dichroic film, and for example, the spectral transmission wavelength of the right region 17a is 400 nm to 500 nm (blue), and the spectral transmission wavelength of the left region 17b is 650 nm to 750 nm (red).

Figure 6 shows an example of the relationship between the spectral characteristics of the LED, the transmittance characteristics of the dichroic film in region 17a, and the spectral characteristics of the LED after passing through the dichroic film.

The transmittance characteristics of the dichroic film in region 17a are such that it transmits wavelengths between 400 nm and 500 nm, so the light that passes through region 17a is blue light. Although not shown, if the transmittance characteristics of the dichroic film in region 17b are 650 nm to 750 nm, the light that passes through region 17b is red light.

The white light emitted from the light source 12a passes through the spectrometer 15, and is emitted as guide light 18, with blue light 18a on the right side and red light 18b on the left side, and the boundary 18e indicating the position of the optical axis, and is further emitted toward the measurement point as guide light 18 of approximately parallel light beams (light beams with a predetermined spread angle) by passing through the irradiation lens 14a.

The color-producing element 17 is not limited to a dichroic film, and can be modified in various ways. For example, it can be an absorbing film that absorbs specific wavelengths, colored glass of a different color can be used, or a phosphor can be applied to change the wavelength, an EW element can be used, or a combination of a dichroic film and a phosphor can be used.

Next, the relationship between the light sources 12a, 12b, and 12c and the spectrometer 15 will be explained.

As described above, the light sources 12a, 12b, and 12c are arranged so that their optical axes are located on the same vertical plane, and further, the light sources 12b and 12c are arranged symmetrically in the vertical direction with respect to the optical axis 13a, and the optical axes 13b and 13c of the light sources 12b and 12c are inclined at a predetermined angle α in the vertical direction with respect to the optical axis 13a.

The spectrometer plate 15 has a rectangular shape that is elongated in the vertical direction, and has the region 17a and the region 17b on the left and right of the boundary 17e that extends in the longitudinal direction.

The light sources 12a, 12b, and 12c are provided close to the spectrometer 15, and the white visible light 18a, 18b, and 18c emitted from the light sources 12a, 12b, and 12c pass through the spectrometer 15 and enter the illumination lenses 14a, 14b, and 14c, respectively.

The light beams 18a, 18b, and 18c are focused by the illumination lenses 14a, 14b, and 14c, respectively, at a predetermined spread angle β, and the light beams 18a, 18b, and 18c are collected and irradiated as guide light 18 having a boundary 18e.

The optical axis 13b and the optical axis 13c are inclined at a predetermined angle α with respect to the optical axis 13a, and the relationship between this inclination angle α and the spread angle β is set so that at least the light 18a and the light 18b, and the light 18a and the light 18c overlap partially, respectively, and no discontinuous portions of the light beam are generated between the light 18a, 18b and the light 18a, 18c when irradiated as the guide light 18.

In this embodiment, the spread angle of the guide light 18 is 2×α+β in the vertical direction and β in the horizontal direction. The vertical length (up-down length) and horizontal length (width) of the spectrometer 15 are the lengths through which the light 18a, 18b, and 18c emitted from the light sources 12a, 12b, and 12c pass.

The inclination angle α and the spread angle β are appropriately determined according to the working environment. In addition, although the number of light sources is three in the above embodiment, it is not limited to three, and may be two or four or more.

In this embodiment, the guide light 18 can be emitted with a large spread angle in the vertical direction. Furthermore, since the spread angle in the vertical direction is obtained by arranging multiple light sources, there is no decrease in the light quantity or brightness due to the large spread angle of the guide light 18. Therefore, visibility for the worker is not impaired.

In addition, in the above embodiment, the guide light 18 is expanded in the vertical direction, but if it is expanded in the horizontal direction, the above configuration can be rotated 90° horizontally so that the optical axes 13a, 13b, 13c and the boundary 18e are included in the same horizontal plane.

In other words, the light sources 12a, 12b, and 12c, the spectrometer plate 15, and the irradiation lenses 14a, 14b, and 14c can be rotated 90° together.

Figures 7(A) and 7(B) show a second embodiment.

In the second embodiment, the arrangement of the light sources 12a, 12b, 12c and the irradiation lenses 14a, 14b, 14c is the same as in the first embodiment, but the light splitter 15 is divided into small light splitters 15a, 15b, 15c, and each small light splitter 15a, 15b, 15c corresponds to the light sources 12a, 12b, 12c, respectively. The small light splitters 15a, 15b, 15c may have any shape such as a rectangular plate or a circular plate, but in this embodiment, they are rectangular plates.

Each of the small light-splitting plates 15a, 15b, and 15c is divided into left and right regions, and color-producing elements 17 (17a, 17b) with different spectral characteristics are formed in the left and right regions. In addition, the boundaries formed by each of the small light-splitting plates 15a, 15b, and 15c are set to be located on a vertical plane that includes the optical axes of the light sources 12a, 12b, and 12c.

By dividing the small light-splitting plates 15a, 15b, and 15c to correspond to the light sources 12a, 12b, and 12c, the small light-splitting plates 15a, 15b, and 15c need only be large enough to transmit the smallest part of the light beam diameter of the light 18a, 18b, and 18c, making it possible to miniaturize them.

In addition, by unitizing the light source 12a, the small light plate 15a, and the irradiation lens 14a into the guide light irradiation unit 19a (similarly unitizing the light sources 12b and 12c, the small light plates 15b and 15c, and the irradiation lenses 14b and 14c into the guide light irradiation units 19b and 19c), the degree of freedom in the configuration and arrangement of the guide light irradiation optical system 11 is increased.

Figures 8(A) and 8(B) show the main parts of the guide light irradiation optical system 11 of the third embodiment. In Figures 8(A) and 8(B), parts equivalent to those shown in Figures 7(A) and 7(B) are given the same reference numerals and their explanations are omitted.

In the first and second embodiments, the guide light 18 is transmitted through the spectral plate 15 to color the light, but in the third embodiment, the spectral plate 15 is a reflector, and coloring is performed by reflecting the light off the spectral plate 15. Also, FIG. 8 shows a case where the light source includes two light sources 12a and 12b.

The light sources 12a and 12b are arranged symmetrically above and below the optical axis 13 of the guide light irradiation optical system 11. The optical axis 13 is set parallel to the collimation optical axis.

Small reflectors 21a and 21b are provided facing the light sources 12a and 12b, respectively, and irradiation lenses 14a and 14b are provided on the reflected light axes 22a and 22b of the small reflectors 21a and 21b, respectively. The small reflectors 21a and 21b constitute the spectroscopic plate 15. The optical axes of the light sources 12a and 12b and the reflected light axes 22a and 22b are set to be located in the same vertical plane.

Since light sources 12a and 12b have the same configuration, the following description will focus on light source 12a.

A coloring element 17 is formed on the reflective surface of the small reflector 21a.

The coloring elements 17 (17a, 17b) have optical characteristics in which the regions 17a, 17b on the left and right of the boundary 17e passing through the optical axis 13a have different spectral transmittances (see FIG. 4). For example, a dichroic film is used as the coloring elements 17.

The color-producing element 17 is not limited to a dichroic film, but may be, for example, an absorbing film that absorbs a specific wavelength, or a phosphor coating that changes the wavelength.

Also, it is not necessary to form a dichroic film on either one of the regions 17a and 17b, for example, on the region 17b. In this case, the guide light will be two colors, blue light and white light.

The white light emitted from the light source 12a is colored by being reflected by the color-emitting elements 17a and 17b, and is emitted as guide light 18a having a boundary 18e.

Similarly, for the light source 12b, guide light 18b having a boundary 18e is emitted from the irradiation lens 14b, and the upper and lower guide lights 18a and 18b are combined and irradiated as guide light 18.

Here, the boundary 17e between the color-producing elements 17a, 17b formed on the small reflectors 21a, 21b, respectively, is arranged to be located within a vertical plane including the optical axes of the light sources 12a, 12b and the reflected optical axes 22a, 22b. Therefore, in the collected guide light 18, the boundary 18e appears as a vertical straight line passing through the optical axis 13.

In the third embodiment, the light source 12a, the small reflector 21a, the irradiation lens 14a, and the light source 12b, the small reflector 21b, and the irradiation lens 14b may be unitized as the guide light irradiation unit 23a and the guide light irradiation unit 23b.

Figure 9 shows a modified example of the color-producing element 17. In Figure 9, the same reference numerals are used to refer to the same parts as those shown in Figure 4.

In this modified example, a gradation of color or brightness is provided to the color elements formed in areas 17a and 17b obtained by dividing the color element 17 into two parts, left and right.

Region 17a has a gradation in which the color and brightness change gradually from the bottom to the top of the figure, while region 17b has a gradation in which the color and brightness change gradually from the bottom to the top of the figure, the opposite to region 17a.

In addition, gradation can be achieved by, for example, giving a gradient to the thickness of the dichroic film.

The guide light 18 has a color gradation, allowing the surveyor to intuitively determine in which direction he or she should move by recognizing the color.

The fourth embodiment will be described with reference to Figures 10 to 13. In Figures 10 to 13, the same reference numerals are used to designate parts that are the same as those shown in Figure 7.

The fourth embodiment shows a case where multiple light sources 12a, 12b, 12c, 12d, and 12e are arranged three-dimensionally. The light sources 12a, 12b, 12c, 12d, and 12e emit broadband light (for example, visible white light) as in the above-mentioned embodiments.

Figure 10 is a front view, Figure 11 is a view seen from the direction of arrow A in Figure 10, and Figure 12 is a view seen from the direction of arrow B in Figure 10.

Light source 12a is arranged on optical axis 13a, and light sources 12b, 12c and light sources 12d, 12e are arranged symmetrically above, below and to the left and right of optical axis 13a. Optical axis 13a is set parallel to the collimation optical axis, and optical axis 13a is the reference optical axis in the fourth embodiment.

The optical axes 13b, 13c, 13d, and 13e of the light sources 12b and 12c are inclined at a predetermined angle in the expansion direction relative to the optical axis 13a.

Furthermore, the optical axes 13a, 13b, and 13c are configured to be included in the same vertical plane (vertical plane), and the optical axes 13a, 13d, and 13e are configured to be included in the same horizontal plane (horizontal plane).

First, regarding the light source 12a, the light source 12a, the small light plate 15a, and the irradiation lens 14a are arranged on the optical axis 13a, and the small light plate 15a and the light source 12a are provided near the focal position of the irradiation lens 14a. Note that either the light source 12a or the small light plate 15a may be provided at the focal position of the irradiation lens 14a.

The light source 12a, the small spectrometer 15a, and the irradiation lens 14a constitute the guide light irradiation unit 19a.

Similarly, for the light sources 12b, 12c, 12d, and 12e, small light dividing plates 15b, 15c, 15d, and 15e and irradiation lenses 14b, 14c, 14d, and 14e are provided on the optical axes 13b, 13c, 13d, and 13e, respectively, to form guide light irradiation units 19b, 19c, 19d, and 19e, respectively.

The small light-splitting plates 15a, 15b, 15c, 15d, and 15e will be described with reference to FIG. 12. The small light-splitting plates 15a, 15b, 15c, 15d, and 15e may have any shape, such as a rectangular plate or a circular plate, but in this embodiment, they are rectangular plates.

The small light-splitting plate 15a on the optical axis 13a is divided into four equal parts, vertically and horizontally, around the optical axis 13a, to form regions 25a, 25b, 25c, and 25d, and color-producing elements with different spectral characteristics are formed in each of the regions 25a, 25b, 25c, and 25d. For example, dichroic films with different spectral transmittances are formed as the color-producing elements.

The guide light emitted from the light source 12a passes through each of the areas 25a, 25b, 25c, and 25d of the small spectrometer 15a, and each area is colored in one of four colors. Furthermore, vertical and horizontal boundaries are formed at the boundaries of each area. The vertical boundaries are included in the vertical plane, and the horizontal boundaries are included in the horizontal plane. In addition, the intersection of the vertical and horizontal boundaries coincides with the optical axis 13a.

The small spectrophotometer 15b on the optical axis 13b is divided into left and right regions 26a and 26b with a vertical line passing through the optical axis 13b as the boundary, and dichroic films with different spectral transmittances are formed in each of the regions 26a and 26b.

Here, the spectral transmittance characteristics of the dichroic film formed in the region 26a are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25a. Also, the spectral transmittance characteristics of the dichroic film formed in the region 26b are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25b.

The guide light emitted from the light source 12b passes through each of the areas 26a and 26b of the small light plate 15b, and is colored in two colors for each area. The color of the light that passes through the area 26a matches the color of the light that passes through the area 25a. Furthermore, the color of the light that passes through the area 26b matches the color of the light that passes through the area 25b.

In addition, the vertical boundary line of the small splitter plate 15b coincides with the vertical boundary line formed by the small splitter plate 15a.

The small splitter plate 15c on the optical axis 13c is divided into left and right regions 27c and 27d by a vertical line passing through the optical axis 13c, and dichroic films with different spectral transmittances are formed in the respective regions 27c and 27d.

The spectral transmittance characteristics of the dichroic film formed in the region 27c are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25c. Also, the spectral transmittance characteristics of the dichroic film formed in the region 27d are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25d.

The guide light emitted from the light source 12c passes through each of the areas 27c and 27d of the small light plate 15c, and is colored in two colors for each area. The color of the light that passes through the area 27c matches the color of the light that passes through the area 25c. Furthermore, the color of the light that passes through the area 27d matches the color of the light that passes through the area 25d.

In addition, the vertical boundary line formed by the small light-splitting plate 15c coincides with the vertical boundary line formed by the small light-splitting plate 15a.

The small splitter plate 15d on the optical axis 13d is divided into upper and lower regions 28b and 28c with a horizontal line passing through the optical axis 13d as the boundary, and dichroic films with different spectral transmittances are formed in each of the regions 28b and 28c.

The spectral transmittance characteristics of the dichroic film formed in the region 28b are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25b. Also, the spectral transmittance characteristics of the dichroic film formed in the region 28c are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25c.

The guide light emitted from the light source 12d passes through each of the areas 28b and 28c of the small light plate 15d, and is colored in two colors for each area. The color of the light that passes through the area 28b matches the color of the light that passes through the area 25b. Furthermore, the color of the light that passes through the area 28c matches the color of the light that passes through the area 25c.

In addition, the horizontal boundary line formed by the small splitter plate 15d coincides with the horizontal boundary line formed by the small splitter plate 15a.

The small splitter plate 15e on the optical axis 13e is divided into upper and lower regions 29a and 29d with a horizontal line passing through the optical axis 13e as the boundary, and dichroic films with different spectral transmittances are formed in each of the regions 29a and 29d.

The spectral transmittance characteristics of the dichroic film formed in the region 29a are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25a. Also, the spectral transmittance characteristics of the dichroic film formed in the region 29d are made the same as the spectral transmittance characteristics of the dichroic film formed in the region 25d.

The guide light emitted from the light source 12e passes through each of the areas 29a and 29d of the small light plate 15e, and is colored in two colors for each area. The color of the light that passes through the area 29a matches the color of the light that passes through the area 25a. Furthermore, the color of the light that passes through the area 29d matches the color of the light that passes through the area 25d.

In addition, the horizontal boundary line formed by the small splitter plate 15e coincides with the horizontal boundary line formed by the small splitter plate 15a.

The guide light emitted from the guide light irradiation units 19b, 19c, 19d, and 19e is collected and irradiated from the guide light irradiation optical system 11 as a collected guide light 31. The collected state of the collected guide light 31 is shown in FIG. 13.

In the collective guide light 31, a vertical boundary 31a and a horizontal boundary 31b are formed, and the intersection of the boundary 31a and the boundary 31b coincides with the optical axis 13a. The optical axis 13a is parallel to the collimation optical axis.

Let the four regions defined by the boundary 31a and the boundary 31b be the first quadrant 32a, the second quadrant 32b, the third quadrant 32c, and the fourth quadrant 32d. The first quadrant 32a is light colored by the regions 25a, 26a, and 29a. The second quadrant 32b is light colored by the regions 25b, 26b, and 28b. The third quadrant 32c is light colored by the regions 25c, 27c, and 28c. The fourth quadrant 32d is light colored by the regions 25d, 27d, and 29d.

The first quadrant 32a, the second quadrant 32b, the third quadrant 32c, and the fourth quadrant 32d are each a different color, so the boundaries 31a and 31b can be clearly identified, and the survey worker can recognize which quadrant he is in by recognizing the color of the collective guide light 31, and can determine the direction of movement.

Furthermore, by recognizing the change in color of the collective guide light 31, the boundaries 31a and 31b can be recognized, and the direction of movement toward the optical axis 13a can be recognized.

According to the fourth embodiment, the collective guide light 31 can be recognized over a wide range, and the horizontal and vertical movement directions can be recognized by distinguishing the colors. In addition, since the collective guide light 31 is formed by light from multiple light sources 12, a decrease in the amount of light and brightness is suppressed even when irradiated over a wide range, and visibility for the surveying worker is not impaired.

Furthermore, in this embodiment, the light transmitted through the small light plates 15b, 15c, 15d, and 15e may be configured to form a gradation so that the direction of movement can be determined.

REFERENCE SIGNS LIST 1 Guide light irradiation device 2 Total station 3 Pole 11 Guide light irradiation optical system 12 Light source 13 Optical axis 14 Irradiation lens 15 Spectroscopic plate 17 Coloring element 18 Guide light 19a, 19b, 19c Guide light irradiation unit 21a, 21b Small reflector

Claims (9)

A guide light irradiation device that irradiates guide light to indicate the aiming direction to a surveying worker, the guide light irradiation optical system of the guide light irradiation device includes multiple light sources, the light sources are broadband light sources that emit broadband light, the optical axes of the multiple light sources are arranged in the same vertical or horizontal plane, an irradiation lens is provided on each optical axis, and a spectral plate is provided between the irradiation lens and the light source, a coloring element is formed on the spectral plate, the coloring element has at least two areas with different spectral characteristics, the boundaries of the areas are included in the plane, the spectral plate and the light source are configured to be located near the focal position of the irradiation lens, and the light emitted from the multiple light sources is colored by the areas, irradiated and collected by the irradiation lens, and irradiated as guide light containing at least two colors of light. A guide light irradiation device configured as follows. The guide light irradiation device according to claim 1, wherein the light source is a white LED that emits visible white light. The guide light irradiation device according to claim 1, wherein the spectral plate has the color-developing elements formed on a transparent substrate. The guide light irradiation device according to claim 1, wherein the coloring elements are formed on the reflecting surface of the reflector of the spectroscopic plate. The guide light irradiation device according to claim 3, wherein the spectral plate has an elongated rectangular shape through which light from the multiple light sources passes, the region is divided into two along the short side direction, and color-emitting elements having different spectral characteristics are provided in the divided portion to form two regions, and the two regions form a boundary extending in the longitudinal direction of the transparent substrate, and the boundary is configured to be included within the plane. The guide light irradiation device according to claim 3, wherein the light-splitting plate is made up of small light-splitting plates arranged on the optical axes of the light sources in correspondence with the light sources, at least two regions are formed on the small light-splitting plate, and color-developing elements having different spectral transmittances are provided in each region, and the boundaries of the regions are included in the plane. The guide light irradiation device according to claim 5 or 6, in which the optical axes of the light sources are inclined at a predetermined angle in a direction in which the irradiated light expands. The guide light irradiation device according to claim 1, wherein the guide light irradiation unit is constituted by the irradiation lens, the small light plate, and the light source arranged on the optical axis of the light source, and the guide light irradiation optical system is composed of a plurality of guide light irradiation units, one guide light irradiation unit has a reference optical axis parallel to the collimation direction, and the optical axes of the other guide light irradiation units are inclined at a predetermined angle with respect to the reference optical axis in a direction in which the irradiated light expands. The guide light irradiation device according to claim 1, in which a guide light irradiation unit is formed by the irradiation lens arranged on the optical axis of the light source, the small light plate, and the light source, and the guide light irradiation optical system is composed of five guide light irradiation units, one guide light irradiation unit has a reference optical axis parallel to the collimation direction, two guide light irradiation units are provided in a vertical plane including the reference optical axis and are symmetrical from top to bottom with respect to the reference optical axis, and two guide light irradiation units are provided in a horizontal plane including the reference optical axis and are symmetrical from left to right with respect to the reference optical axis, the guide light is formed by a collection of light emitted from the five guide light irradiation units, and each of the small light plates is divided into regions and color elements are formed in the regions so that the guide light has a boundary included in the vertical plane and a boundary included in the horizontal plane.

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