JPS61147101A - Measuring method of surface shape and distance of object - Google Patents

Abstract

PURPOSE:To know the shape, size, etc., of an object by irradiating the object with light beams at constant intervals and comparing intervals of the spots with intervals of spots which are inputted previously. CONSTITUTION:Light beams projected from an arranged optical fiber array increase in spot interval according to irradiation distance. Namely, spot-to-spot distance is larger and larger as the object is more and more distant from a fiber array light part 2. Then, variation in the interval between spots is inputted to a computer and then compared with each measured spot-to-spot interval to know the distance from the fiber array light part 2 to the object. Then, the shape and distance of even a complex object, i.e. combination of irradiated objects to an optional point are known.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method of applying light to an object through continuous spots formed by continuous fiber rows or slits arranged in a straight line on the end surface. This is a method for measuring the height and shape of an object, and is related to a measurement method that can be used in industrial and medical endoscopes. However, it has the disadvantage that it is difficult to understand the three-dimensional state such as the height and shape of the observation site. In addition, industrial robots do not have the eye function to identify objects, so they have not been able to provide high functionality and high reliability. Therefore, in medical care, industrial robots, and other industries, it is required to be able to measure the height of an object and the unevenness of the object as concrete numerical values.

[Means for solving problems]

The present invention can be applied to a target object by irradiating light onto the target object through a continuous spot formed by a fiber array with linear end faces or a continuous slit, and determining the interval between the irradiated light beams of the continuous spots. Embodiment An embodiment of the present invention will be described below. FIG. 1 is a side view showing the irradiation state of the present invention, and FIG. 2 is a plan view thereof. In the figure, 1 is an illumination light section, and 2 is a fiber column light section that forms a continuous spot If.For example, when used in an endoscope, the illumination light section 1 and the fiber column light section are mounted on the head as shown in FIG. Place 2.

First, the optical fiber array used in the present invention will be explained. As shown in FIG. 4, the optical fiber array light is a light beam in which one light beam is branched into a number of light beams of equal light intensity, and such a light beam is irradiated from the optical fiber array. Optical fibers having an outer diameter of about 15 to 501 mm are used, and a predetermined number of optical fibers are arranged in a continuous line with end faces.

As shown in FIG. 1, the distance between the spots of the light beams emitted from the optical fiber arrays arranged in this manner increases in accordance with the irradiation distance. The distance between the spots becomes wider as the object is farther away from the eyelid light section 2, and becomes narrower as the object gets closer. By inputting this change in the spacing between spots into the computer, you can
By comparing and calculating the measured inter-spot spacing, it is possible to know the distance from the fiber array optical section 2 to the target object.

More specifically, FIG. 5 CI) shows a case in which the object is irradiated with a light beam at equal spot intervals. This shows that the object to be irradiated is a flat surface, and the distance to the object can also be determined from the spacing between the spots.

Next, FIG. 5 (II) shows a case where the object is irradiated with the light beam with the spot interval gradually widening.

This shows that the object to be irradiated is a slope, and the angle of the slope and the distance to the point on the slope can be determined by the spacing between the spots. Next, Fig. 5 (III) shows the light beam of the object. This shows the case where the spot spacing is narrower in the middle than in the outside.

This shows that the irradiation target is swollen.
The bulge, shape, and distance to any point can be determined by the spacing between the spots.

FIG. 5 (IV) shows a case where the spot interval of the light beam on the object is wider at the middle than at the outside.

This makes it possible to see that the irradiation target is recessed, and the extent and shape of the recess, as well as the distance to an arbitrary point, can be determined based on the spacing between the spots.

By doing the above, even if the object is complex, such as a combination of the above-mentioned irradiation objects, its shape and distance to an arbitrary point can be known.

As described above, the light beam emitted from the fiber array light section 2 is irradiated onto the irradiation target, and the illumination light section 1 is for illuminating the illumination target.

Therefore, as shown in Fig. 3, an illumination light section 1 and a fiber array light section 2 are provided at the tip of an endoscope for industrial or medical use.
In internal work, the size and bulge of the object to be viewed,
It is possible to measure the degree of depression, height, etc.

Although the above embodiment uses a fiber row as a continuous spot, other continuous spots or continuous small holes may be used.

〔Effect of the invention〕

According to the present invention as described above, the light beams irradiated at regular intervals are irradiated onto the target, the intervals between the spots are known, and the distance between the spots is compared with the interval between the spots which has been input in advance. It is possible to perform 3D observation by knowing the shape and size of objects.

[Brief explanation of drawings]

FIG. 1 is a side view showing the irradiation state of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a side view of essential parts showing an example of application to an endoscope.
Figure 4 is a partially enlarged perspective view showing the fiber row, Figure 5 (
, I), (IF), (m), and (IV) are explanatory diagrams showing the distance between the observation target and the spot of the light beam. 1... Illumination light section 2... Fiber column light section patented
Applicant Machida Manufacturing Co., Ltd. Agent Patent Attorney Takashi Kanakura @ 1 = Virtue 2 Figure @ 3 En @ 4 Mouth @ 5 [m (I) (π) (N) (ff) = 2-

Claims (1)

[Claims] 1. A light beam enters a continuous spot formed by lining up the fiber ends or making slits in succession, irradiates the target object with the light beam from this continuous spot, and the irradiated light beam hits the target object. By knowing the spacing of each spot that occurs, this inter-spot spacing can be calculated by comparing it with the relationship between the spot spacing and the distance from the continuous spot portion to the object, which has been input into the computer in advance. 1. A method for measuring the surface shape and distance of an object, characterized in that the shape and size of the object can be measured by