JPH0553219B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a detection device for an optical measurement device that measures the properties of an object to be measured, such as temperature and moisture. [Prior Art] Conventionally, light has been used to measure the temperature, moisture, and other properties of an object to be measured. For example, there are monochromatic radiation thermometers, radiation thermometers with a tipper, two-color thermometers, and infrared moisture meters that use two colors.
These are different optical systems depending on the purpose, measurement method, etc.
A detection part was used. [Problems to be Solved by the Invention] Therefore, different optical systems and detection units are required for each measurement method, and a large number of various components must be prepared. A separate detection device must be prepared for each change, which is very complicated in terms of manufacturing and measurement. In view of the above points, an object of the present invention is to provide an optical measuring device in which the detection section is miniaturized and can be used in common. [Means for Solving the Problems] The present invention provides a support for holding an entrance hole through which measurement light enters, a condensing lens for condensing the measurement light, and a light branching means for branching the incident light in a base body. An insertion hole into which the means is removably inserted, at least one element insertion hole into which a detection element for receiving light from the branching means is removably installed, and a mounting hole into which a chopper means for intermittent measurement light is installed are formed. This is a detection device of an optical measuring device made of [Example] Fig. 1 is a front cross-sectional explanatory diagram showing an embodiment of the detection device of the optical measuring device of the present invention, and Fig. 2 is a
It is a cross-sectional explanatory view from a plane. In the figure, reference numeral 1 denotes a substantially rectangular parallelepiped-shaped base of the detection device, and an entrance hole 2 is formed on one surface of the base 1, through which incident light from an object to be measured enters, for example, via an optical fiber. A first element insertion hole 41 into which the first detection element 31 is removably installed on the back surface opposite to the one surface having the same shape, and a second element insertion hole 41 into which the second detection element 32 is removably inserted into the surface perpendicular to the first element insertion hole 41. An element insertion hole 42 is formed. Further, from a plane perpendicular to the element insertion holes 41 and 42, a light branching means 50 such as a half mirror or an optical filter is installed between the entrance hole 2 and the first element insertion hole 41 so as to be perpendicular to the entrance hole 2. An insertion hole 6 is formed into which a holding means 5 for intervening and holding is inserted, and the light from the entrance hole 2 is transmitted to the first and second element insertion holes 41 and 42.
can be branched into each of the detection elements 31 and 32. The entrance hole 2 has a lens L and detection elements 31, 3.
Optical filters 71, 72, etc. can be attached to the front surface of 2. Further, in the entrance hole 2, a mounting hole 9 is formed in which a chopper means 8 having a sector 82 for cutting and cutting light on a rotary shaft 81 is mounted. This mounting hole 9
is formed of an elongated insertion hole 91 into which the rotating shaft 81 is inserted and a large diameter portion 92 with a shallow bottom in which the sector 82 is accommodated. The intermediate portion 93 of the mounting hole 9 has a slightly larger diameter, and the rotating shaft 81 of the chopper means 8 is mounted on the intermediate portion 93 via two bearings 90, 90 such as bearings. The end of the rotary shaft 81 of the chopper means 8 is connected to the rotary shaft 11 of the motor 10 via a flexible and insulating connecting means 12 made of a flexible tube such as a silicone rubber tube, so that the motor 10 rotates. Then, the rotating shaft 11,
The sector 82 rotates via the connecting means 12 and the rotating shaft 81. That is, for example, the ends of the rotary shaft 91 of the chopper means 8 made of metal or the like and the ends of the rotary shaft 11 of the motor 10 made of metal or the like are inserted and fixed into the openings at both ends of the tube of the coupling means 12, respectively. In other words, in the detection device of the optical measuring device of the present invention, the detection elements 41 and 42 can be removably inserted into the first and second element insertion holes 31 and 32 of the base body 1, and The holding means 5 having the light branching means 50 can be removably inserted into the holding means 5, and the chopper means 8 can also be removably installed into the mounting hole 9, so that it can be used for various purposes and measurement methods. An example of its use is shown in the table below.

[Table] In the first case, for example, the first detection element 31 is Si
By using the element and providing a filter 71, it can be used as a monochromatic radiation thermometer or the like. In the second case, a chopper means 8 is added, and it can be used as a radiation thermometer using a detection element 31 made of PbS, Ge, etc., which requires interruption of incident light. In the third case, it can be used in a two-color thermometer, a two-color moisture meter, etc., in which the measuring light is made incident on the first and second detection elements 31 and 32 by the light branching means 50. In the fourth case, it can be used in a two-color thermometer, a two-color moisture meter, etc., which use detection elements 31 and 32 that require the chopper means 8 to interrupt the incident light. Furthermore, the detection element 32 can be provided with a light source and used for light projection. In this way, since each component is removably attached to the base 1, it is possible to perform various measurements without preparing special parts. In addition, since the rotating shaft 11 of the motor 10 and the rotating shaft 81 of the chopper means 8 are connected by a flexible and well-insulated connecting means 12 such as a flexible tube, electrical noise such as induction of the motor 10 may occur. This does not adversely affect the optical system and elements of the base, and rotation can be transmitted reliably. [Effects of the Invention] As described above, the present invention has a structure in which the detection element, the holding means for holding the light branching means, the chopper means, etc. are detachably attached to the base of the detection device, so that the detection element, the holding means for holding the light branching means, the chopper means, etc. are detachably attached to the base of the detection device. It can be used for various applications simply by assembling the parts, and it is easy to downsize and standardize detection devices. Further, there is no need to change the entire configuration for each measurement method, the number of types of parts in stock is small, manufacturing and maintenance are easy, and it is extremely easy to change the detection device due to changes in the measurement method, etc.

[Brief explanation of the drawing]

FIGS. 1 and 2 are configuration explanatory diagrams showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Base body, 2... Incidence hole, 31, 32... Detection element, 41, 42... Element insertion hole, 50... Light branching means, 5... Holding means, 6... Insertion hole, 71, 72... Filter, 8... Chopper means , 81...Rotation axis, 9...
Mounting hole, 10... Motor, 11... Rotating shaft, 12... Connecting means.

Claims (1)

[Claims] 1. In the basics of a detection device that detects measurement light from an object to be measured, an entrance hole through which the measurement light enters is formed in the base, and a condensing lens is provided in this entrance hole. an insertion hole is formed into which a holding means for holding a light branching means for branching the incident light is removably inserted, and a detection element for receiving light from the branching means is removably mounted. 1. A detection device for an optical measuring device, characterized in that one element insertion hole is formed, and a mounting hole is formed for mounting a chopper means for cutting and cutting measurement light. 2. The base body has a substantially rectangular parallelepiped shape, an entrance hole is formed on one surface thereof, and an element insertion hole is formed on a back surface facing the entrance hole and a side surface perpendicular to the entrance hole, and the element insertion hole is perpendicular to the back surface facing the entrance hole and the element insertion hole is formed on one surface thereof. An insertion hole for a holding means for holding the light branching means is formed perpendicular to the entrance hole on the surface where no insertion hole is formed, and a mounting hole for mounting the chopper means on the surface having the entrance hole. A detection device for an optical measuring device according to claim 1. 3. A detection device for an optical measurement device according to claim 1 or 2, characterized in that the measurement light is made incident through an optical fiber.