Guide light irradiation device
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TOPCON CORPORATION
- Filing Date
- 2023-06-23
- Publication Date
- 2026-06-29
AI Technical Summary
Conventional guide light irradiation devices require multiple parts, including two laser light sources and a right-angle mirror, occupying a large space and complicating alignment, making them cumbersome to manufacture and use.
A guide light irradiation device utilizing a broadband light source, an irradiation lens, and a spectroscopic plate with a coloring element, which divides light into different colors using regions with distinct spectral characteristics, simplifying the optical system and reducing the number of parts.
The device achieves a simple configuration with fewer parts, enabling easy manufacturing and effective direction guidance for staking workers by emitting guide light with clear color boundaries, enhancing visibility and ease of use.
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Abstract
Description
[Technical field]
[0001] The present invention relates to a guide light emitting device that emits guide light for guiding a surveying operator. [Background technology]
[0002] 2. Description of the Related Art In a surveying operation, a guide light emitting device that emits guide light is known as a device for guiding a surveying worker.
[0003] 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, 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.
[0004] Conventionally, a guide light emitting 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 having a boundary. An example of a guide device is shown in Patent Document 1.
[0005] Conventional guide light emitting devices require two laser light sources of different colors and a right-angle mirror, and therefore require a large number of parts and the laser light sources are arranged opposite each other, occupying a large space. Furthermore, the alignment work of the two light sources and the right-angle mirror is complicated. [Prior art documents] [Patent documents]
[0006] [Patent Document 1] JP 2020-165839 A Summary of the Invention [Problem to be solved by the invention]
[0007] The present invention provides a guide light emitting device which has a small number of parts and can be easily manufactured. [Means for solving the problem]
[0008] The present invention relates to a guide light emitting device that emits guide light to show a direction to a surveying worker, the optical system of the guide light emitting device including an illumination lens, a spectral plate, and a light source, the light source being a broadband light source that emits light in a broadband, a coloring element formed on the spectral plate, the coloring element having at least two regions with different spectral characteristics, one of the spectral plate and the light source being configured to be located at or near the focal position of the illumination lens, and the other being located near or at the focal position of the illumination lens, the light emitted from the broadband light source being colored by the region, and the guide light including at least two colors being irradiated from the illumination lens.
[0009] The present invention also relates to the guide light irradiating device, wherein the light source is a white LED that emits white light of visible light.
[0010] The present invention also relates to the guide light emitting device, wherein the light source is an LED that emits invisible near-infrared light.
[0011] The present invention also relates to a guide light emitting device in which the spectral plate has the color-developing elements formed on a transparent substrate.
[0012] The present invention also relates to a guide light emitting device, wherein the spectral plate has the coloring elements formed on the reflecting surface of a mirror.
[0013] The present invention also relates to the guide light emitting device, wherein the coloring element is divided vertically or horizontally into a plurality of regions.
[0014] The present invention also relates to a guide light emitting device in which the color-developing element is further divided into two parts, left and right or top and bottom, and has a plurality of regions.
[0015] The present invention also relates to a guide light emitting device in which the color-producing elements have a gradation in which the color changes gradually from one end to the other end.
[0016] The present invention also relates to a guide light irradiation device in which the transparent substrate has an elongated rectangular shape, the region is divided into two along the short side direction, and color-emitting elements having different spectral transmittances are provided in the divided portion to form two regions, the two regions form a boundary extending in the longitudinal direction of the transparent substrate, a plurality of the light sources are provided within a plane including the boundary, and the optical axes of the light sources are inclined at a predetermined angle relative to each other.
[0017] Furthermore, the present invention relates to a guide light irradiating device in which the irradiation lens is an anamorphic lens. Effect of the Invention
[0018] According to the present invention, there is provided a guide light emitting device for emitting guide light to show a direction to a surveying worker, and an optical system of the guide light emitting device includes an illumination lens, a spectral plate, and a light source. The light source is a broadband light source that emits light in a broadband band. A color-emitting element is formed on the spectral plate, and the color-emitting element has at least two regions with different spectral characteristics. One of the spectral plate and the light source is configured to be located at or near the focal position of the illumination lens, and the other is configured to be located near the focal position of the illumination lens or at the focal position. The light emitted from the broadband light source is colored by the region, and is irradiated from the illumination lens as guide light containing light of at least two colors. This provides the excellent effects of a simple optical system configuration, a small number of parts, and easy manufacture. [Brief description of the drawings]
[0019] [Figure 1] FIG. 1 is an explanatory diagram illustrating an overview of a guide light emitting device according to a first embodiment. [Diagram 2] FIG. 2A is an explanatory diagram showing a main part of a guide light emitting optical system of the guide light emitting device, and FIG. 2B is a diagram showing a cross section of a light beam of the guide light. [Diagram 3] FIG. [Figure 4] 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. [Diagram 5] FIG. 11 is an explanatory diagram showing a first modified example of the coloring element. [Figure 6] FIG. 11 is an explanatory diagram showing a second modified example of the coloring element. [Figure 7] FIG. 13 is an explanatory diagram showing a third modified example of the coloring element. [Figure 8] FIG. 13 is an explanatory diagram showing a fourth modified example of the coloring element. [Figure 9] FIG. 13 is an explanatory diagram showing a fifth modification of the coloring element. [Figure 10] FIG. 10A is a schematic diagram of a guide light irradiating optical system according to a second embodiment, and FIG. 10B is a diagram showing a cross section of a light beam of guide light in the second embodiment. [Figure 11] FIG. 11 is an explanatory diagram of color-developing elements in the second embodiment. [Figure 12] FIG. 13A is a schematic diagram of a guide light irradiating optical system according to a third embodiment, and FIG. 13B is a diagram showing a cross section of a light flux of guide light in the third embodiment. [Figure 13] FIG. 13A is a schematic diagram of a guide light irradiating optical system according to a fourth embodiment, and FIG. 13B is a diagram showing a cross section of a light beam of guide light in the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0021] 1 is an explanatory diagram for showing an overview of a guide light emitting device 1 according to this embodiment, and shows a state in which the guide light emitting device 1 is attached to the upper surface of a total station 2. The optical axis of the guide light emitting device 1 is set parallel to the collimation optical axis of the total station 2.
[0022] 1, reference numeral 3 denotes a pole on which a prism 4 is provided. In addition, FIG. 1 shows a state in which the pole 3 is installed at a staking point 5.
[0023] The total station 2 is installed at a known point, and the sighting direction is set to the staking point 5 .
[0024] Fig. 2(A) is a schematic diagram showing the main part of the optical system of the guide light emitting device 1. Fig. 2(A) shows a plan view of the optical system, in which the upper side indicates the right, the lower side indicates the left, and the left side indicates the front. Fig. 2(B) shows a cross section of the light beam of the guide light.
[0025] In FIG. 2A, reference numeral 11 denotes a guide light projection optical system, 12 denotes a projection lens, a light source 14 is provided at the focal position on an optical axis 13 of the projection lens 12, and a spectroscopic plate 15 is provided in front of the light source 14.
[0026] The light source 14 is a broadband light source that emits light having a wide band of wavelengths, for example an LED that emits visible white light.
[0027] The spectral plate 15 has color elements 17b (17a, 17b) formed on the surface of a transparent substrate 16 (see FIG. 3), 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 13 have different spectral transmittances. As the color elements 17, for example, a dichroic film is used.
[0028] In the above description, in Fig. 2(A), the color-developing element 17 is formed on the surface of the spectral plate 15 facing the projection lens 12, but it may be formed on the surface of the spectral plate 15 facing the light source 14. Also, the spectral plate 15 is provided near the focal position of the projection lens 12. It is also possible to set the spectral plate 15 at the focal position of the projection lens 12 and provide the light source 14 near the focal position.
[0029] The color-developing element 17 is a dichroic film, and for example, the spectral transmission wavelength of the left region 17a is 400 nm to 500 nm (blue), and the spectral transmission wavelength of the right region 17b is 650 nm to 750 nm (red).
[0030] FIG. 4 shows an example of the relationship between the spectral characteristics of the LED, the transmittance characteristics of the dichroic film in the region 17a, and the spectral characteristics of the LED after transmission through the dichroic film.
[0031] The transmittance characteristic of the dichroic film in region 17a is 400nm to 500nm, so the light transmitted through region 17a is blue light. Although not shown, if the transmittance characteristic of the dichroic film in region 17b is 650nm to 750nm, the light transmitted through region 17b is blue light.
[0032] The white light emitted from the light source 14 passes through the spectrometer 15, and is emitted as guide light 18 with blue light 18a on the left side, red light 18b on the right side, and boundary 18e indicating the position of the optical axis (see Figure 2 (B)). By passing through the illumination lens 12, the guide light 18 is irradiated toward the measurement point as an approximately parallel beam (a beam having a predetermined spread angle).
[0033] In guiding a construction worker during construction work, if the construction worker recognizes the guide light 18 as red, it can be determined that the worker is to the right of the construction point, and the worker is guided to the construction point by moving to the left.
[0034] In addition, either one of the regions 17a and 17b, for example the region 17b, may not have a dichroic film formed thereon, or may have only an AR coating, in which case the guide light will be two colors, blue light and white light.
[0035] In the above explanation, regions 17a and 17b were formed to divide the color-forming element 17 into left and right halves, but in cases where the measurement point is set in a location with a difference in elevation, or where it is necessary to guide the measurement point to a specified height standard, the color-forming element 17 may be divided into upper and lower regions.
[0036] Furthermore, the manner in which the color-producing elements 17 are divided can be changed in various ways.
[0037] In the first modified example shown in Fig. 5, the color-producing element 17 is divided into four parts, vertically and horizontally. Dichroic films with different spectral transmittances are formed for the four divided areas 21a, 21b, 21c, and 21d. The guide light transmitted through the color-producing element 17 forms areas of four different colors, and further forms vertical and horizontal boundaries at the boundaries between the areas. Furthermore, the intersections of the vertical and horizontal boundaries are aligned with the optical axis 13 of the guide light 18.
[0038] When the surveyor recognizes the guide light, he can determine which area he is in by the color, and can also determine in which direction he should move to reach the position of the optical axis 13 by recognizing the color.
[0039] In the first modified example, by forming four divided regions 21a, 21b, 21c, and 21d, it becomes possible to provide guidance in both the horizontal and vertical directions.
[0040] The color-producing element 17 may be configured so that the guide light has two colors and the colors are the same in the diagonally opposite areas.
[0041] FIG. 6 shows a second modification of the color-forming element 17.
[0042] In the second modified example, the color-developing element 17 is divided into four horizontally to form four rectangular regions 22a, 22b, 22c, and 22d, and the spectral transmittance of the dichroic film formed in each region is made different. Regions of different colors are formed in the horizontal direction of the guide light, and the surveyor can intuitively determine in which direction and how far he should move by recognizing the color.
[0043] The number of divisions is not limited to four, but may be three, five or more.
[0044] Figure 7 shows a third modified example. In the third modified example, in addition to the division of the second modified example, it is further divided into two levels, upper and lower, to form eight regions. Regarding the coloring of the regions, it is possible to reverse the order of coloring the upper level and the flower bed, for example.
[0045] In the third modified example, the stakeout worker can intuitively determine in which direction and how far he should move by recognizing the color, and can also confirm his up and down positions and the position of the optical axis 13.
[0046] In the fourth modification shown in FIG. 8, the coloring elements 17 are formed so that they do not form distinct areas, but rather form a gradation in which the color changes gradually in the horizontal direction.
[0047] Incidentally, gradation can be formed by, for example, providing a gradient in the thickness of the dichroic film.
[0048] The formation of a color gradation in the guide light 18 enables the surveyor to intuitively determine in which direction and how far he or she should move by recognizing the color.
[0049] In the fifth modification shown in Fig. 9, the coloring element 17 is divided into two parts, upper and lower, and a gradation in which the color gradually changes horizontally is formed in each of the upper and lower regions. Also, by reversing the color change of the upper and lower gradations, the worker can recognize his / her position in the vertical direction and intuitively judge in which direction and how far he / she should move in each of the upper and lower regions.
[0050] The color-developing element 17 is not limited to a dichroic film, and can be modified in various ways, such as an absorbing film that absorbs a specific wavelength, colored glass of a different color, a coating of phosphor to change the wavelength, an EW element, or a combination of a dichroic film and phosphor.
[0051] As described above, the light source 14 and the spectral plate 15 are both provided at or near the focal position of the illumination lens 12, so that the positional relationship between the light source 14 and the spectral plate 15 can be fixed. Therefore, the light source 14 and the spectral plate 15 can be made into a unit.
[0052] In the environment of the staking out work, the total station 2 and the staking out point 5 may be close or far away, and when they are close, the larger the spread angle of the guide light 18, the easier it is to recognize the guide light 18 and the better the workability. On the other hand, when they are far away, if the irradiation range becomes too wide, the light quantity decreases and the workability worsens. Therefore, when they are far away, it is better for the spread angle of the guide light 18 to be small.
[0053] Therefore, it is preferable that the spread angle of the guide light 18 can be adjusted according to the working environment.
[0054] In the above embodiment, the light source 14 and the spectroscopic plate 15 may be integrated into a light source unit, and the position of the light source unit may be adjustable relative to the illumination lens 12. By making the configuration adjustable, the state of focusing the guide light 18 by the illumination lens 12 can be changed by adjusting the position of the light source unit, and the spread angle of the guide light 18 can be easily adjusted.
[0055] Next, the spectroscopic plate 15 may be made rotatable about the optical axis 13 .
[0056] In this case, by rotating the light splitter plate 15 by 90 degrees, the guide light 18, which is color-coded on the left and right, is color-coded on the top and bottom.
[0057] For example, in a place with a difference in elevation, first the surveyor is guided horizontally by the guide light 18, which is color-coded left and right, and then the spectrometer 15 is rotated 90° and the guide light 18 is color-coded up and down, allowing the surveyor to confirm the vertical position of the survey point. Therefore, the surveyor can be guided in two directions, horizontally and vertically.
[0058] Fig. 10(A), Fig. 10(B) and Fig. 11 show the second embodiment. Fig. 10(A) is a schematic diagram showing the main part of the optical system of the guide light emitting device 1, and shows an elevation view. In Fig. 10(A), the upper side indicates the top and the lower side indicates the bottom. Fig. 10(B) shows a cross section of the light beam of the irradiated guide light 18, and Fig. 11 shows the coloring element 17 used in the second embodiment.
[0059] In the second embodiment, a boundary 24e' is formed by the guide light 18 over a wide range in the vertical direction.
[0060] The spectral plate 15 is shaped like a vertically long rectangle, and the region is divided into two parts, left and right, along the short side. Color-producing elements 17 having different spectral transmittances are provided in the divided parts to form regions 24a and 24b. A boundary 24e extending in the longitudinal direction (vertical direction in this embodiment) is formed by the regions 24a and 24b.
[0061] Three light sources 14a, 14b, and 14c are disposed facing the spectroscopic plate 15. The light sources 14a, 14b, and 14c are each a broadband light source that emits light having a broadband wavelength (for example, white light), and are LEDs with a divergence angle α.
[0062] The optical axes 25a, 25b, and 25c of the light sources 14a, 14b, and 14c are radially arranged in the same vertical plane that includes the boundary 24e'.
[0063] The optical axis 25a of the light source 14a is set parallel to the collimation optical axis of the total station 2 (see FIG. 1). The optical axis 25b is inclined upward at an angle of, for example, 30° with respect to the optical axis 25a, and the optical axis 25c is inclined downward at an angle of, for example, 30° with respect to the optical axis 25a. The inclination angle is not limited to 30°, but is appropriately set to 10°, 20°, etc. depending on the work environment.
[0064] With respect to the light source 14a, an illumination lens 12a is disposed on the optical axis 25a of the light source 14a, and the color-producing element 17 and the light source 14a are set to be at or near the focal point of the illumination lens 12a.
[0065] Similarly, for the light source 14b and the light source 14c, the illumination lens 12b and the illumination lens 12c are arranged on the optical axis 25b and the optical axis 25c, and the color-producing element 17 and the light source 14b and the light source 14c are set to be at or near the focal points of the illumination lenses 12b and 12c, respectively.
[0066] When the light sources 14a, 14b, and 14c are turned on, the light emitted from each of the light sources 14a, 14b, and 14c passes through the color-producing element 17 and is colored by the area 24a and the area 24b, respectively. The light is then collected by the projection lenses 12a, 12b, and 12c at a required spread angle and irradiated as guide light beams 18-1, 18-2, and 18-3, which are color-coded on the left and right. The guide light beams 18-1, 18-2, and 18-3 are then irradiated as a collected guide light beam 18.
[0067] Since the optical axes of the light sources 14a, 14b, and 14c are in a vertical plane including the boundary 24e, the color boundary of the guide lights 18a, 18b, and 18c corresponding to the boundary 24e is vertically continuous. Therefore, the guide light 18 is emitted as light of different colors on the left and right of the vertical boundary 24e'. The guide light 18 has a guide light spread angle of 60°+α in the up-down direction and a single guide light spread angle in the horizontal direction.
[0068] Therefore, in this embodiment, the guide light 18 can be emitted with a large vertical spread angle. Furthermore, since the vertical spread angle is obtained by arranging multiple light sources 14, there is no decrease in the light quantity and brightness due to the large spread angle of the guide light 18. Therefore, visibility for the worker is not impaired.
[0069] Furthermore, in this embodiment, the light sources 14a, 14b, and 14c are provided adjacent to one spectroscopic plate 15, and further the light sources 14a, 14b, and 14c are provided adjacent to each other, so that the light source unit does not become large in size.
[0070] In addition, in this embodiment, since the guide light 18 can be recognized over a wide range in the vertical direction, the surveyor will not lose sight of the guide light when there is an elevation difference at the surveying work site.
[0071] In the above embodiment, the spread angle of the guide light 18 is increased in the up-down direction (vertical direction). However, the spread angle of the guide light 18 can also be increased in the horizontal direction.
[0072] Referring to FIG. 10(A), the longitudinal direction of the spectrometer 15 is oriented horizontally, and the optical axes of the light sources 14a, 14b, and 14c, as well as the illumination lenses 12a, 12b, and 12c, are included within a horizontal plane including a boundary 24e extending horizontally.
[0073] In this case, a guide light spread angle of 60°+α in the horizontal direction is obtained.
[0074] Since a horizontal reference can be obtained by the wide horizontal range of the guide light 18, the horizontal reference can be confirmed at multiple points simultaneously. In addition, by applying this to indoor construction work, a reference can be obtained for interior work.
[0075] Furthermore, the light sources 14a, 14b, and 14c, the spectrometer 15, and the illumination lenses 12a, 12b, and 12c may be integrally configured and rotatable about a horizontal axis (i.e., the optical axis 25a), so that the direction in which the guide light spreads can be selected according to the working environment.
[0076] In the above description, the light source 14 is 3, but it may be 2 or 4. Furthermore, the optical axes of the light sources are set to be inclined at a predetermined angle with respect to the adjacent optical axes, and the optical axes are set to be inclined at predetermined angles with respect to each other.
[0077] Figures 12(A) and 12(B) show a third embodiment. In Figures 12(A) and 12(B), the same reference numerals are used for the same parts as those shown in Figures 2(A) and 2(B), and the description thereof will be omitted.
[0078] In Fig. 12(A), the upper side indicates the upper side and the lower side indicates the lower side. The upper and lower sides are the vertical direction, and the direction perpendicular to the paper surface is the horizontal direction. Fig. 12(B) shows a cross section of the irradiated guide light 18.
[0079] The third embodiment shows a configuration in which the spread angle is increased in the horizontal or vertical direction using one light source 14. Fig. 12(A) and Fig. 12(B) show a case in which the spread angle is increased in the horizontal direction.
[0080] The light source 14 is a broadband light source that emits light having a wide band of wavelengths (for example, white light), and an LED with a wide divergence angle is used.
[0081] An anamorphic lens is used as the projection lens 27. The projection lens 27 has a stronger light collecting effect in the vertical direction.
[0082] Guide light 18 emitted from light source 14 passes through spectral plate 15 on which color-producing elements 17 are formed, and is colored into upper and lower two-color guide light 18a and guide light 18b. Furthermore, guide light 18 is strongly focused in the vertical direction by irradiation lens 27, and has an elliptical beam cross section with its major axis in the horizontal direction, and guide light 18a and guide light 18b form boundary 18e extending in the horizontal direction.
[0083] Therefore, the upper and lower guide lights 18a and 18b of two colors and the boundary 18e function as guide lights over a wide range in the horizontal direction.
[0084] 13A and 13B show a guide light irradiating optical system 11 according to the fourth embodiment.
[0085] In the fourth embodiment, the color-producing elements 17 are formed on the reflecting surface.
[0086] A mirror 29 is provided as a spectroscopic plate 15 on the optical axis 13 of the projection lens 12. A color-developing element 17 is formed on the reflecting surface of the mirror 29, and the spectroscopic plate 15 is set at or near the focal position. A light source 14 is provided on the reflected optical axis of the mirror 29, and the optical axis of the mirror 29 is aligned with the reflected optical axis.
[0087] The coloring element 17 is the same as that shown in Fig. 3, and is divided into two regions 17a and 17b by a boundary 17e passing through the optical axis 13, and each of the regions 17a and 17b has optical characteristics of having a different spectral transmittance. For example, a dichroic film is used as the coloring element 17. Alternatively, a phosphor that changes the wavelength may be applied. Furthermore, a combination of a dichroic film and a phosphor may be used.
[0088] The light source 14 is provided close to the mirror 29 , and the light source 14 (light emitting point) is set at or near the focal position of the irradiation lens 12 .
[0089] The broadband light (white light) emitted from the light source 14 is colored by being reflected by the regions 17a and 17b, and is irradiated as two-color guide light beams 18a, 18b and guide light beam 18 having a boundary 18e.
[0090] In the fourth embodiment, the light source 14 is provided on the reflected optical axis of the mirror 29, so that the depth distance to the irradiation lens 12 is shortened, and the guide light irradiation optical system 11 can be configured compactly. Furthermore, bending the optical axis 13 by the mirror 29 has an advantage of increasing the degree of freedom in designing the guide light irradiation optical system 11.
[0091] Incidentally, a mirror may be further provided between the projection lens 12 and the spectroscopic plate 15 so that the optical axis 13 is bent a number of times.
[0092] In the above first to fourth embodiments, visible white light is exemplified as the broadband light, and a white LED is exemplified as the light source, but invisible light may be used as the broadband light, and an invisible LED may be used.
[0093] In this case, a light receiver that receives invisible guide light is used, and the light receiver is provided with a guide display unit that displays the result of receiving the guide light and further displays an instruction on the direction of movement based on the result of receiving the guide light. Also, the direction of movement may be guided to the survey worker by voice.
[0094] Furthermore, the receiver may be provided with a communication function with the total station 2, and the light receiving state may be communicated to the total station 2, and a guide to the worker may be displayed on the display unit of the total station 2. As a notification method in the total station 2, the LED of the indicator of the total station may be made to flash or emit light continuously to indicate the direction in which the survey worker should move, or the color of the indicator may be used to indicate the direction in which the survey worker should move.
[0095] Furthermore, it goes without saying that the fourth embodiment can also be applied to modifications of the color-producing elements 17, such as modifications of the division of the color-producing elements 17 shown in Figures 5 to 9, and modifications of the color-producing elements 17, such as the formation of a gradation in which the color gradually changes.
[0096] As described above, in the guide light emitting device of the above embodiment, a broadband light source that emits light in a broad band is used, and the necessary coloring of the guide light is performed by the spectral plate 15. Therefore, one light source and one spectral plate 15 are sufficient, and the configuration is remarkably simplified. [Explanation of symbols]
[0097] 1 Guide light irradiation device 2. Total Station 3. Paul 11 Guide light irradiation optical system 12 Irradiation lens 13 Optical axis 14 Light source 15 spectroscopic plate 17 Coloring Elements 18 Guide Light 27 Irradiation lens 29. Mirror
Claims
1. A guide light irradiation device for irradiating guide light to indicate direction to a surveying worker, wherein the optical system of the guide light irradiation device includes an irradiation lens, a spectrometer, and a light source, the light source being a broadband light source that emits broadband light, the spectrometer being provided with a color-generating element, the color-generating element having at least two regions with different spectral characteristics, the light source being positioned at or near the focal position of the irradiation lens, and the spectrometer being positioned between the irradiation lens and the light source and close to the light source, and the light emitted from the broadband light source being colored by the regions and irradiated from the irradiation lens as guide light containing at least two colors of light.
2. The guide light irradiation device according to Claim 1, wherein the optical system of the guide light irradiation device includes a plurality of light sources, the optical axes of the plurality of light sources are arranged in the same vertical plane, an irradiation lens is provided corresponding to each of the light sources, the spectrometer is provided between the irradiation lens and the light source, the boundary of the region is included in the plane, and the light emitted from the plurality of light sources is colored by the region, irradiated by the irradiation lens and collected, and irradiated as guide light containing at least two colors of light.
3. The guide light irradiation device according to claim 1 or claim 2, wherein the light source is a white LED that emits visible white light.
4. The guide light irradiation device according to claim 1 or claim 2, wherein the light source is an LED that emits invisible near-infrared light.
5. The guide light irradiation apparatus according to claim 1 or 2, wherein the spectroscopic plate is a transparent substrate on which the color-generating element is formed.
6. The guide light irradiation device according to claim 1 or claim 2, wherein the spectroscopic plate has the color-generating element formed on the reflective surface of a mirror.
7. The guide light irradiation device according to claim 1, wherein the color-generating element is divided into multiple regions vertically or horizontally.
8. The guide light irradiation device according to claim 7, wherein the color-generating element is further divided into left and right or upper and lower 2 parts, and has multiple regions.
9. The guide light irradiation device according to claim 1, wherein the color-generating element has a gradient in which the color gradually changes from one end to the other.
10. The guide light irradiation device according to claim 5, wherein the transparent substrate has a long rectangular shape, is divided into two regions in the direction of the short side, and a color-generating element having a different spectral transmittance is provided in the divided portion to form two regions, a boundary extending in the longitudinal direction of the transparent substrate is formed by the two regions, a plurality of the light sources are provided in the plane including the boundary, and the optical axes of the light sources are tilted relative to each other at a predetermined angle.
11. The guide light irradiation device according to claim 1, wherein the irradiation lens is an anamorphic lens.
12. The guide light irradiation device according to claim 2, wherein the light irradiating the optical axes of the light source is tilted at a predetermined angle in a direction in which the light expands.