JPH11287750A - Optical measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change a measurement diameter in a simple constitution by setting a light-projecting and a light-detecting lenses in a measurement optical path of an apparatus main body. SOLUTION: The light of a light source 1 set inside a main body 10 of this apparatus is reflected at a projecting mirror 2, changed in direction and condensed at a condenser lens 3. The condensed light is projected as a spot S of a predetermined measurement diameter by a light-projecting lens 4 of a window body to an object 11 to be measured. The light reflected by the object is condensed by a light-detecting lens 5 of the window body and, the light condensed and reflected by a concave mirror 6 is reflected at a convex mirror 7 to be condensed to a detecting element 8. A state of the object 11 to be measured is measured in this manner. A plate body 9 of an opaque body is set at a boundary of the light-projecting and light-detecting lenses 4 and 5 of the window body, thereby preventing a mutual interference of lights from the inside light-projecting lens 4 and the outside light-detecting lens 4. At this time, the light-projecting, light-detecting lenses 4, 5 constituting the window body in a measurement optical path are made detachable to the main body 10 of the apparatus. When the light-projecting, light-detecting lenses 4, 5 of a predetermined curvature conforming to the measurement are selected and combined, the measurement diameter of a necessary optional value is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical measuring device that emits and receives light to perform measurement.

[0002]

2. Description of the Related Art As shown in Japanese Patent Publication No. 932/1986, the applicant has developed a technique relating to a reflection measuring optical system. This is related to a translucent window plate interposed in the measurement optical path of the reflection measurement optical system, and a boundary surface between a part of the window plate and another portion is formed of an impermeable plate, thereby causing interference. This is for prevention.

[0003]

However, with such an optical measuring device having a dustproof window plate, it is necessary to change the measuring diameter or the like depending on the purpose of measurement or the state of the object to be measured. In addition, the entire light projecting optical system and light receiving optical system of the apparatus main body inside the window plate must be changed, which is very complicated.

An object of the present invention is to provide an optical measuring apparatus having a simple configuration and capable of easily changing a measuring diameter and the like in view of the above points.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to an optical measuring apparatus for projecting and receiving light from a light source to and from a measuring object, wherein a window having a light projecting lens and a light receiving lens is provided in a measuring optical path of a main body of the apparatus. This is an optical measuring device.

[0006]

FIG. 1 is a structural explanatory view showing an embodiment of an optical measuring apparatus according to the present invention. In the figure, 1
Reference numeral 0 denotes a device main body such as a box of an optical measuring device, and a light source 1 for light projection is provided inside the device main body 10, and a light projecting mirror for changing the direction by reflecting the light of the light source 1 is provided. 2. A condensing lens 3 for condensing the light reflected by the light projecting mirror 2 is provided. The light of the condenser lens 3 is projected as a spot S having a predetermined measurement diameter on the measurement target 11 by the projection lens 4 as a window body. The light reflected from the measurement target 11 is condensed by a light receiving lens 5 as a window body, condensed by a concave mirror 6, and the light reflected by the concave mirror 6 is reflected by a convex mirror 7 and condensed on a detection element 8, and is measured. The measurement of the property of the subject 11 is performed.

Here, an opaque plate 9 is provided at the boundary between the light projecting lens 4 and the light receiving lens 5 as a window body, the light projecting lens 4 on the inside and the light receiving lens 5 on the outside. Mutual interference is prevented. The window body having the light projecting lens 4 and the light receiving lens 5 is detachable from the apparatus main body 10.

That is, since the window provided in the measuring optical path of the optical measuring device is constituted by the light projecting lens 4 and the light receiving lens 5, the light projecting lens 4 having a predetermined curvature according to the measurement is provided. By selecting and combining the light receiving lenses 5, a required arbitrary measurement diameter can be obtained. In this way, a plurality of windows of a combination of the light projecting lens 4 and the light receiving lens 5 corresponding to the measurement distance, the measurement diameter and the like are prepared in advance, and the optimum window is attached to the instrument main body 10 so that the internal A desired device can be realized without changing the optical system. As described above, the measurement diameter can be easily changed depending on the measurement purpose or the state of the measurement target, and only the window portion needs to be detached and replaced from the outside at the time of assembly, specification change, maintenance / maintenance, etc. .

In the above example, the curvatures of the light projecting lens 4 and the light receiving lens 5 of the window body are different, but it is possible to project and receive light with one curvature by an optimal optical design. One such lens may be configured.

[0010]

As described above, the present invention relates to an optical measuring apparatus for projecting and receiving light from a light source to and from a measuring object, comprising a window having a light projecting lens and a light receiving lens in a measuring optical path of the apparatus main body. An optical measuring device as described above. For this reason, if it is necessary to change the measurement diameter or the like depending on the measurement purpose or the state of the measurement target, only the window body having the light projecting lens and the light receiving lens needs to be changed. It is not necessary to change the entire light receiving optical system, and it is possible to obtain a required arbitrary measurement diameter by preparing a window body in which a light projecting lens and a light receiving lens are selected and combined according to the measurement. In other words, a plurality of windows with a combination of a projection lens and a light receiving lens corresponding to the measurement distance and the measurement diameter are prepared in advance, and the optimal window is selected and attached to the instrument main body, so that the internal optical system is A desired device can be flexibly realized without any change. If the boundary between the light projecting lens and the light receiving lens of the window body is an opaque body, there is no mutual interference between the light projecting and light receiving, and the window body having the light projecting lens and the light receiving lens is attached to the apparatus main body. When it is detachable, the measurement diameter can be easily changed depending on the purpose of measurement or the state of the measurement object, etc.
When changing specifications, maintenance, maintenance, etc., only the window can be removed and replaced from the outside.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing one embodiment of the present invention.

[Description of Signs] 1 light source 2 light-emitting mirror 3 light-collecting lens 4 light-emitting lens 5 light-receiving lens 6 concave mirror 7 convex mirror 8 detecting element 9 plate 10 device body 11 measurement target S spot

Claims (3)

[Claims] 1. An optical measuring device for projecting and receiving light from a light source to and from a measuring object, wherein the optical measuring device includes a window having a light projecting lens and a light receiving lens in a measuring optical path of the device main body. . 2. The optical measuring device according to claim 1, wherein a boundary between the light projecting lens and the light receiving lens of the window body is an opaque body. 3. The optical measuring device according to claim 1, wherein the window body having the light projecting lens and the light receiving lens is detachable from the apparatus main body.