JP2015145978A - Light regression inner surface reflection mirror conical cube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distance measurement light regression cube that can be manufactured at low cost even in a large size, can be visually recognized from the front face of an accurate measurement position, having no distance fluctuation due to prism transmission refraction and virtual image of a focal point, and does not cause a prism spectroscopic phenomenon.SOLUTION: In a surface reflection conical cube 1 having a right-angle conical structure which performs surface reflection such that an input light beam 2 is subjected to light beam regression on the same path as a right-angle three-surface prism to become an output light beam 3, by arranging a small hole 4 at a focal point, focal point recognition from the front face of an accurate measurement position is enabled.

Description

  The present invention relates to an inner surface reflector type cube that is accurate in light ray regression and easy to produce.

  The ray regression cube was a trihedral corner (right angle) prism.

  However, advanced prism processing that accurately obtains the right-angle accuracy is necessary and only a small one can be made, and distance variation due to prism transmission refraction, a virtual image of a trihedral side angle, and prism spectroscopy occur.

  In the use of a general corner prism, this drawback is small and the product price is high, and there are problems such as confirmation of the measurement position from the distance measuring telescope, confirmation of the oblique distance position, distance correction, and spectroscopy by wavelength.

  This improvement measure includes a method of inputting a distance correction constant according to the refractive index of the prism and a separate indicator with an external focus, but the adjustment becomes complicated.

Japanese Patent Application Laid-Open No. 2007-500885

Wikipedia "Light Corner Cube"

  The problem to be solved is a problem that a large-sized product accurately obtains the right-angle accuracy and eliminates the distance fluctuation due to the prism transmission refractive index, the prism spectroscopy, and the virtual image of the trihedral side angle.

  The main feature of the present invention is that it is an inner surface mirror, not a right-angle trihedral prism, but an inner surface mirror cone having a focal point with a small hole at the center of 90 degrees.

  The inner surface mirror reflecting cone cube of the present invention is large in size and can be manufactured with high accuracy and at low cost, no virtual image is generated, accurate measurement position is visible from the front, distance correction is not necessary, distance fluctuation due to prism transmission refractive index, prism spectroscopy There is an advantage of not doing.

FIG. 1 is an explanatory view showing a method of implementing the inner surface reflector conical cube. (Example 1) FIG. 2 is a front view of the surface reflector conical cube. FIG. 3 is a side view of the surface reflector conical cube. FIG. 4 is an external view of the surface reflector conical cube.

  When viewed from the front of the cube, it was realized without sacrificing the structure of the optical system with the number of parts of the internal mirror with a circular shape that is lean when viewed from the front, a target small hole point at the center, and a triangular cone from the side that is a right-angle cone.

FIG. 1 is a perspective view of a one-surface-reflecting 90-degree conical cube, embodiment of the device internal mirror of the present invention.

  2 is an input beam, 3 is an output beam, and a path.

Reference numeral 4 denotes a central small hole visible from the front.

Derived from the central small hole, 5 is a vertical center line, and 6 is a horizontal center line.

  The detailed path of the input ray and the output ray returns with the same path as the right-angle trihedral reflecting prism. Since the subject of the present invention is the reflection right-angle cone structure of the optical system, the description of the incidental mechanism system is omitted.

In measuring the distance between the Earth and the moon, it is currently impossible to create a large-sized prism for daily distance measurement after the Apollo spacecraft. Cube.
Light reflection reflection cube for general surveying.
Auto car driving target cube. Applicable to etc.

1 Surface reflection, focal 90 degree internal mirror cone cube.
2 Input rays.
3 Output beam.
4 Center small hole.
5 Vertical center line that can be derived from the center hole.
6 Horizontal center line that can be derived from the center hole.

Claims (2)

  An accurate distance-measuring optical regression cube, distance variation due to prism transmission refraction, no virtual image of the focus, no prism spectroscopy, inner surface reflector cone cube. An inner surface reflector cone cube that can be viewed from the front without a virtual image of the focal point by arranging a small hole at the focal point.