JPH1054792A - Optical measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the assembling and regulation of an optical system and improve the radiation effect, by providing a radiating means on, at least, one surface of a box body, uniting all optical systems and optical parts, and assembling them into the inner surface of the radiating means. SOLUTION: A holding body 40 for holding a lens 4 is provided on the inner surface of the radiating means 2, and a motor 5 for rotating a rotating plate 50 is also held by the holding body 40 and united thereto. A holding body 70 on the outside having a window part and enclosing the inside holding body 60 is united as the whole, and provided on the radiating means 2. A power source 10 is provided on the plate body 13 of the box body 1 above a light source 3, and the plate body 13 is provided on the box body 1 through a nonmetallic interposed body 14 such as packing to ensure airtightness and thermal insulation. Namely, since the light source 3 and all optical parts of projecting and receiving optical systems are united and assembled onto the radiating means 2, their assembling and optical regulation can be performed before housing into the case of the box body 1, and the working property is significantly improved.

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 for measuring properties of an object to be measured.

[0002]

2. Description of the Related Art An optical measuring device for measuring the properties of water or the like of a measurement object using light includes a light projecting means for projecting light to the measurement object, and a detection means for receiving light from the measurement object. It is composed of an optical system including elements, a measurement circuit including electronic components, and the like.

[0003]

However, this type of optical measuring device has various optical components, and assembling and adjusting operations are complicated. In addition, the heat includes a light source and the like, and this heat causes an increase in the temperature inside the apparatus, adversely affects various elements such as a detection element and a measurement circuit, and reduces reliability.

An object of the present invention is to provide an optical measuring device which is easy to assemble and adjust an optical system and has an excellent heat radiation effect.

[0005]

According to the present invention, there is provided a heat radiating means provided on at least one surface of a box, and a light projecting means or a light emitting or receiving means provided on an inner surface of the heat radiating means inside the box. And 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
Is a box having a substantially rectangular parallelepiped shape. A heat radiating means 2 such as a heat radiating fin having a fold shape on the outside and a flat shape on the inside is provided, for example, on a lower surface of the box 1. The heat dissipating means 2 is attached to the box 1 via a non-metallic intervening body 12 such as a packing to achieve airtightness and thermal insulation.

A light source 3 as a light projecting means is provided on the inner surface of the heat radiating means 2 inside the box 1, and a base 31 of the light source 3 is provided.
Is mounted on a fixing bracket 32, and the fixing bracket 32 is provided on the heat radiating means 2. Further, the light source 3
Are provided on the inner surface of the heat radiating means 2 to enhance the heat radiating effect. Then, the light from the light source 3 is condensed by the lens 4 and projected on the rotating plate 50 rotated by the motor 5. The rotating plate 50 has a plurality of filters 51... Alternately arranged on the circumference, and the light from the light source 3 sequentially passes through any one of the filters 51. Window part 61 of the inner transparent body among the window parts formed in means 2
The light is projected on the object to be measured through. The light reflected from the object to be measured is transmitted through the upper transparent mirror 71 through the outer transparent window 62.
And is reflected by the convex mirror 72 thereunder to form a concave mirror 71
At the center of the detection element 8. The lens 4, the rotating plate 50, the mirror 6, the concave mirror 71, the convex mirror 72, and the like constitute an optical system for projecting or receiving light.

Here, the holding body 40 for holding the lens 4 is provided on the inner surface of the heat radiating means 2, and the motor 5 for rotating the rotary plate 50 is also held by the holding body 40 as required to form a unit. In addition, a cylindrical holder 60 having a convex mirror 72 provided above and a mirror 6 provided below partitions the inner window portion 61 and the outer window portion 62 and is provided on the inner surface of the heat radiation means 2. Further, the holding body 70 holding the concave mirror 71,
It surrounds the holding body 60 and is similarly provided on the inner surface of the heat radiating means 2. That is, the outer holding body 70 having the window and including the inner holding body 60 is unitized as a whole and provided in the heat radiation means 2. Then, the output of the detecting element 8 provided at the center of the concave mirror 71 is supplied to a measuring section 9 provided above a cylindrical holding body 70 for holding an optical system such as the concave mirror 71 and the like. A predetermined operation is performed by a processing means such as a μCPU provided on a printed circuit board or the like.
Further, the measuring section 9 may be provided integrally with the holder 70.

A power source 10 is provided on the plate 13 of the box 1 above the light source 3, and the plate 13 is provided on the box 1 via a non-metallic intervening body 14 such as a packing. Thermal insulation is achieved. The signal from the measuring unit 9 is output from the terminal unit 11 to the outside, and exchange of the signal with the outside is performed.

That is, the light source 3 as the light emitting means, the light emitting means,
All the optical components of the light receiving optical system are unitized and assembled on the heat radiating means 2, so that optical adjustment such as assembly, light transmission and reception can be performed before being housed in the case of the box 1,
Workability is greatly improved.

The light projecting means such as the light source 3 and the optical system for projecting and receiving light are provided on the inner surface of the heat radiating means 2 after being assembled and adjusted in advance on another flat substrate. In addition, the heat radiation means 2 requires little additional processing and the shape is simple, and the workability of assembling and adjusting is further improved.

Further, the heat generated by the light source 3 and the like is
1. The heat is conducted through the fixing bracket 32 and is radiated by the heat radiating means 2. The heat of the cover 30 which is heated by receiving the light from the light source 3 is also thermally conducted and radiated outward from the heat radiating means 2. Since the heat radiating means 3 is thermally insulated by the inclusion 12, heat does not enter the inside. In this way, the heat is effectively dissipated and does not thermally affect the electronic components and the like mounted on the internal measuring unit 9 and the like, and the other detecting elements 8 and
High-precision and stable measurement can be maintained without changing or adversely affecting characteristics of the optical system such as the filter 51 due to heat. It should be noted that experimentally, in the state of the apparatus of FIG. 1, the temperature rise is about 10 ° C. higher than the ambient temperature.
C. can be reduced, and the operating temperature range can be increased to 60 ° C. or more.

Further, the heat radiating means 2 may be provided on a surface at any position, that is, it may be provided on at least one surface of the box 1, and a part of one surface, a plurality of surfaces may be provided. May be provided.

Although FIG. 1 shows an example in which the power source 10 is provided on the upper plate 13,
May be provided on the same plane as the light source 3. or,
The plate 13 on which the power supply 10 is provided may be any surface as long as it constitutes the outer plate of the box 1.

[0015]

According to the present invention, there is provided a heat radiating means provided on at least one surface of a box, and a light projecting means or a light projecting or light receiving optical system provided on the inner surface of the heat radiating means inside the box. It is an optical measuring device provided with: For this reason, all optical systems and optical components are unitized and assembled on the heat radiating means, which significantly reduces the number of assembling steps and enables optical adjustment before storing them in the box case. The performance is greatly improved, and the number of man-hours can be greatly reduced. As a whole, it is simple, small, and compact. Also, the heat generated by the light emitting means of the light source is effectively radiated directly to the outside from the heat radiating means. Further, since the heat radiating means is thermally insulated by the insulating means, the heat is internally transmitted. It does not penetrate, does not thermally affect the internal detection elements, electronic components, optical components, and the like, prevents deterioration, enables highly accurate and stable measurement, and maintains high reliability.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Heat radiating means 3 Light source (light projection means) 4 Lens 5 Motor 50 Rotating plate 51 Filter 6 Mirror 71 Concave mirror 72 Convex mirror 8 Detecting element 9 Measuring part 40, 60, 70 Holder 10 Power supply 12, 14 Intermediate 13 Plate body

Claims (1)

[Claims] 1. A heat dissipating means provided on at least one surface of a box, and a light projecting means or a light projecting or light receiving optical system provided on an inner surface of the heat dissipating means inside the box. An optical measuring device characterized by the above-mentioned.