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JP-2026075224-A - surveying equipment

JP2026075224AJP 2026075224 AJP2026075224 AJP 2026075224AJP-2026075224-A

Abstract

[Problem] To provide a surveying device that miniaturizes the optical system and the overall device. [Solution] The system comprises a distance measuring light emission unit 24 that emits distance measuring light 31 to an object to be measured, a distance measuring light receiving unit 25 having a light receiving unit 39 that receives reflected distance measuring light 46 from the object to be measured, and a calculation control unit that controls the distance measuring light emission unit and calculates the distance to the object to be measured based on the result of receiving the reflected distance measuring light to the light receiving unit. The distance measuring light receiving unit has a light receiving lens 44 that focuses the reflected distance measuring light and a reflection mirror 45 provided opposite the light receiving lens. The reflected distance measuring light that has passed through the light receiving lens is reflected by the reflection mirror so as to be reversed along the optical axis 38 of the reflected distance measuring light. [Selection Diagram] Figure 2

Inventors

  • 湯浅 太一

Assignees

  • 株式会社トプコン

Dates

Publication Date
20260508
Application Date
20241022

Claims (10)

  1. A measuring device comprising: a distance measuring light emission unit that emits distance measuring light onto an object to be measured; a distance measuring light receiving unit having a light receiving unit that receives reflected distance measuring light from the object to be measured; and a calculation control unit that controls the distance measuring light emission unit and calculates the distance to the object to be measured based on the result of receiving the reflected distance measuring light to the light receiving unit. The distance measuring light receiving unit has a light receiving lens that focuses the reflected distance measuring light and a reflective mirror provided opposite the light receiving lens, and the reflected distance measuring light that has passed through the light receiving lens is reflected by the reflective mirror so as to be reversed along the optical axis of the reflected distance measuring light.
  2. The surveying apparatus according to claim 1, further comprising a scanning mirror that rotates and illuminates the distance measuring light, and a deflection optical member having two reflective surfaces on its front and back sides, wherein the deflection optical member is configured to have a first reflective surface that deflects the distance measuring light so that it aligns with the rotation axis of the scanning mirror, and a second reflective surface that deflects the reflected distance measuring light reflected by the reflective mirror at a right angle or approximately a right angle.
  3. The surveying apparatus according to claim 2, wherein the deflection optical member is a reflective prism bonded to the center of the scanning mirror side surface of the light-receiving lens.
  4. The surveying device according to claim 2, wherein the light-receiving lens is constructed by joining a first optical member and a second optical member, a reflective film is formed on a part of the joining surface, and the front and back surfaces of the reflective film are configured as the first reflective surface and the second reflective surface, respectively.
  5. The surveying apparatus according to claim 2, further comprising: a tracking light emission unit that emits tracking light coaxially with the distance measuring light towards the object to be measured; and a tracking light receiving unit having a tracking light receiving element that receives reflected tracking light reflected coaxially from the object to be measured; wherein a dichroic prism having a separation surface that separates the reflected distance measuring light and the reflected tracking light is positioned on the reflected light axis of the second reflective surface.
  6. The surveying apparatus according to claim 3, wherein the reflective prism is a triangular prism with a flat surface for emitting the reflected distance measuring light.
  7. The surveying apparatus according to claim 3, wherein the reflective prism is a cylindrical mirror with a planar surface formed at the incident position of the reflected distance measuring light, creating an emission surface.
  8. The surveying apparatus according to claim 3, wherein the reflective prism is formed by joining a cylindrical mirror and a plano-concave cylindrical lens, and the plane of the plano-concave cylindrical lens serves as the emission surface.
  9. The surveying apparatus according to claim 3, configured such that a hole is formed in the center of the scanning mirror side surface of the light-receiving lens, and the reflective prism is joined to the hole.
  10. The surveying apparatus according to claim 4, wherein the light-receiving lens is configured such that one of its surfaces—the scanning mirror side surface and the reflective mirror side surface—is curved, while the other surface is flat.

Description

This invention relates to a surveying device capable of acquiring the three-dimensional coordinates of an object to be measured. Surveying devices such as laser scanners and total stations have optical distance measuring devices that detect the distance to a target object using prism distance measurement with retroreflective prisms, or non-prism distance measurement without reflective prisms. The light-receiving section of an optical distance measuring device has an optical system including a lens, and the reflected distance-measuring light is imaged onto the light-receiving surface by the refraction action of the lens. The objective lens of the optical system has a focal length f, and the light-receiving section requires a size that can accommodate the optical system and a length in the optical axis direction that can secure the focal length f. Therefore, due to the constraints of the size and focal length of the optical system, miniaturization of the light-receiving section is difficult. Special table 2013-508694 publication This is a cross-sectional view showing a surveying device according to the first embodiment.This is a diagram showing the distance measuring unit according to the first embodiment.(A) and (B) are views taken along arrow A in Figure 2, respectively, showing modified examples of the reflecting prism.(A) and (B) are explanatory diagrams showing modified examples of the light-receiving lens, respectively.This is a diagram showing a distance measuring unit according to a modified example of the first embodiment.(A) is a diagram showing the distance measuring unit according to the second embodiment, and (B) is a view of (A) from the direction of arrow B.(A) is a diagram showing the distance measuring unit according to the first modified example of the second embodiment, and (B) is a diagram showing the distance measuring unit according to the second modified example. The following describes embodiments of the present invention with reference to the drawings. First, a surveying apparatus according to the first embodiment of the present invention will be described in Figure 1. The surveying device 1 is, for example, a laser scanner, and consists of a leveling unit 2 attached to a tripod (not shown) and a surveying device body 3 attached to the leveling unit 2. The leveling unit 2 has a leveling screw 10, which levels the surveying device body 3 horizontally. The surveying device body 3 comprises a fixed section 4, a mounting section 5, a horizontal rotation shaft 6, a horizontal rotation bearing 7, a horizontal rotation motor 8 as a horizontal rotation drive unit, a horizontal angle encoder 9 as a horizontal angle detection unit, a vertical rotation shaft 11, a vertical rotation bearing 12, a vertical rotation motor 13 as a vertical rotation drive unit, a vertical angle encoder 14 as a vertical angle detection unit, a scanning mirror 15, an operation panel 16 that serves as both an operation unit and a display unit, a calculation control unit 17, a storage unit 18, a distance measuring unit 19, etc. The calculation control unit 17 may be a CPU specifically designed for this device or a general-purpose CPU. The horizontal rotation bearing 7 is fixed to the fixed part 4. The horizontal rotation shaft 6 has a vertical axis 6a, and the horizontal rotation shaft 6 is rotatably supported by the horizontal rotation bearing 7. Furthermore, the support part 5 is supported by the horizontal rotation shaft 6, and the support part 5 rotates horizontally in conjunction with the horizontal rotation shaft 6. A horizontal rotation motor 8 is provided between the horizontal rotation bearing 7 and the support portion 5, and this horizontal rotation motor 8 is controlled by the calculation control unit 17. The calculation control unit 17 uses the horizontal rotation motor 8 to rotate the support portion 5 around the axis 6a. The relative rotation angle of the mounting section 5 with respect to the fixed section 4 is detected by the horizontal angle encoder 9. The detection signal from the horizontal angle encoder 9 is input to the calculation control unit 17, which calculates the horizontal angle data. Based on the horizontal angle data, the calculation control unit 17 performs feedback control to the horizontal rotation motor 8. Furthermore, the mounting section 5 is provided with the vertical rotation axis 11 having a horizontal axis 11a. This vertical rotation axis 11 is rotatable via the vertical rotation bearing 12. The intersection of the axis 6a and the axis 11a is the emission position of the distance measuring light and serves as the origin of the coordinate system of the surveying device body 3. A recess 21 is formed in the mounting portion 5. One end of the vertical rotation shaft 11 extends into the recess 21, and the scanning mirror 15 is fixed to this end. The scanning mirror 15 is housed in the recess 21. The other end of the vertical rotation shaft 11 is provided with the vertical angle encoder