JP5783313B2 - Optical measuring device - Google Patents

Description

  The present invention relates to an optical measurement apparatus that projects detection light onto a measurement object using an optical fiber, and that the reflected light is received by the optical fiber to measure the characteristics of the measurement object.

  In the optical measurement apparatus, the optical fiber guides the detection light oscillated by the oscillator to the measurement object. The optical fiber projects (irradiates) detection light toward the measurement object. The detection light is reflected by the measurement object. The optical fiber receives this reflected light and guides it to the detector. The spectrum or absorbance of the reflected light is measured by the detector. Based on the spectrum or the absorbance of the reflected light, the optical measurement device can measure (analyze) the characteristics (concentration or chemical species) of the measurement object.

  The measurement object is arranged in various modes according to a desired purpose. In a general optical measurement apparatus, the characteristic is measured in a state where the measurement object is fixedly arranged at a predetermined position. This is because moving the measurement object relative to the fixed optical fiber is likely to lead to a decrease in measurement accuracy. Therefore, in a general optical measurement apparatus, an optical fiber is moved in a two-dimensional direction or a three-dimensional direction with respect to a measurement object fixedly arranged.

  Japanese Unexamined Patent Publication No. 2000-158174 (Patent Document 1) discloses a laser processing apparatus that performs three-dimensional processing using an optical fiber cable that transmits laser light. Japanese Patent Application Laid-Open No. 10-58131 (Patent Document 2) discloses a light beam heating device in which a condensing lens mechanism attached to the tip of an optical fiber rotates around the optical axis. Japanese Patent Application Laid-Open No. 7-294704 (Patent Document 3) discloses an optical fiber connector antireflection film forming apparatus for forming an antireflection film on an optical fiber.

JP 2000-158174 A JP-A-10-58131 JP 7-294704 A

  The present invention provides a measurement object with higher accuracy by suppressing the occurrence of twisting in the optical fiber when measuring the characteristics of the measurement object arranged along the circumference using the optical fiber. It is an object of the present invention to provide an optical measuring device capable of measuring properties of an object.

The optical measuring device based on 1st aspect of this invention is an optical measuring device which measures the characteristic of the several measuring object arrange | positioned along with the circumference using an optical fiber. The optical measuring device includes a fixed body, a rotating body, and the optical fiber.

The rotating body is capable of rotating at a second angular velocity while revolving around the fixed body at a first angular velocity. The optical fiber is held by the rotating body, projects detection light onto the plurality of measurement objects, and receives reflected light from the measurement objects. The first angular velocity and the second angular velocity are the same in magnitude and opposite in direction. When measuring the above characteristics, the optical fiber is relative to the plurality of measurement objects along the circumferential direction in a state where the plurality of measurement objects arranged below the optical fiber are fixed. The detection light is projected onto the respective measurement objects from the optical fibers that are moved and moved relative to each other, and the reflected light from the respective measurement objects is received by the optical fibers. The optical measuring device is located above the fixed body and provided so as to pass through both the fixed body and the first gear, and a rotatable first gear provided coaxially with the fixed body. The fixed body is fixed to each other, and a support shaft that rotatably supports the first gear via a bearing provided between the first gear and the first gear. A second rotatable gear that is positioned adjacent to the first gear and spaced from the first gear, and is wound around the outer peripheral surface of the first gear and the outer peripheral surface of the second gear. A toothed belt member, and a rotational drive device that applies rotational power to the second gear. The rotating body is provided on a lower surface side of the first gear, and the optical fiber is provided so as to pass through the first gear and the rotating body in order at a position separated from the support shaft. The optical fiber is fixed to the rotating body, and is rotatably supported by the first gear via another bearing provided between the optical fiber and the first gear.

  The optical measuring device based on the second aspect of the present invention is the optical measuring device based on the first aspect, wherein the fixed body has a first circular portion whose outer shape is circular. The rotating body has a second circular portion having a circular outer shape. The first circular portion and the second circular portion have the same diameter. The optical measuring device further includes an annular belt member surrounding the outer peripheral surface of the first circular portion and the outer peripheral surface of the second circular portion.

  An optical measuring device based on the third aspect of the present invention is the optical measuring device based on the first aspect, wherein the fixed body has a first gear portion formed in a gear shape. The rotating body has a second gear portion formed in a gear shape having the same diameter as the first gear portion. The optical measurement device further includes a gear disposed between the first gear portion and the second gear portion.

  An optical measurement device according to a fourth aspect of the present invention is the optical measurement device according to any one of the first to third aspects, wherein the rotating body revolves a predetermined angle around the fixed body. Each time, the revolution direction of the rotating body is reversed.

  According to the present invention, when measuring characteristics of an object to be measured along the circumference using an optical fiber, the optical fiber is prevented from being twisted, thereby achieving higher accuracy. An optical measurement device that can measure the characteristics of the measurement object can be obtained.

It is a 1st perspective view which shows the optical measuring device in Embodiment 1 (and other structure of Embodiment 1). FIG. 3 is a second perspective view showing the optical measurement device in the first embodiment. 1 is a plan view showing an optical measurement device in Embodiment 1. FIG. It is arrow sectional drawing regarding the IV-IV line | wire in FIG. FIG. 3 is a bottom view showing the tip portion of the optical fiber of the optical measurement device according to Embodiment 1. FIG. 3 is a plan view showing a first rotation state of the optical measurement device in the first embodiment. FIG. 5 is a plan view showing a second rotation state of the optical measurement device according to the first embodiment. FIG. 6 is a plan view showing a third rotation state of the optical measurement device in the first embodiment. FIG. 10 is a plan view showing a fourth rotation state of the optical measurement apparatus in the first embodiment. FIG. 6 is a bottom view showing a first example of an optical fiber in still another configuration of the first embodiment. FIG. 10 is a bottom view showing a second example of an optical fiber in still another configuration of the first embodiment. FIG. 10 is a bottom view showing a third example of an optical fiber in still another configuration of the first embodiment. FIG. 10 is a bottom view showing a fourth example of an optical fiber in still another configuration of the first embodiment. 6 is a plan view showing an optical measurement device in Embodiment 2. FIG. It is arrow sectional drawing regarding the XV-XV line | wire in FIG. FIG. 10 is a plan view showing an optical measurement device in another configuration of the second embodiment. It is arrow sectional drawing regarding the XVII-XVII line | wire in FIG. FIG. 12 is a plan view showing an optical measurement device in still another configuration of the second embodiment. It is arrow sectional drawing regarding the XIX-XIX line | wire in FIG. FIG. 6 is a cross-sectional view showing an optical measurement device in a third embodiment. FIG. 10 is a cross-sectional view showing an optical measurement device in another form of the third embodiment. FIG. 10 is a cross-sectional view showing an optical measurement device in still another embodiment of the third embodiment.

  The optical measurement apparatus according to each embodiment based on the present invention will be described below with reference to the drawings. In the following description, when referring to the number and amount, unless otherwise specified, the scope of the present invention is not necessarily limited to the number and amount. In the following description, the same components and corresponding components will be denoted by the same reference numerals, and redundant descriptions may not be repeated. Unless there is a restriction | limiting in particular, it is scheduled from the beginning to use suitably combining the structure shown in each embodiment shown below.

[Embodiment 1]
(Configuration of optical measuring apparatus 1A)
With reference to FIGS. 1-5, the structure of 1 A of optical measuring apparatuses in this Embodiment is demonstrated. FIG. 1 is a perspective view showing the upper side of the optical measuring apparatus 1A. FIG. 2 is a perspective view showing the lower side of the optical measuring device 1A. FIG. 3 is a plan view showing the upper side of the optical measuring device 1A. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a bottom view showing the distal end portion 42 of the optical fiber 40 in the optical measuring apparatus 1A.

  Referring to FIGS. 1 and 2, the optical measuring device 1A includes a rotary drive device 10, gears 12, 32, a toothed belt member 20, a support shaft 31 (rotary shaft), an optical fiber 40, and a belt member 60 (FIG. 2), pulley 54 (fixed body), pulley 74 (rotary body), oscillator 15, and detector 16.

  The gear 12 is supported by the rotating shaft 11. The gear 12 receives rotational power from the rotary drive device 10 through the rotary shaft 11. The gear 12 is rotatable with the rotary shaft 11 in the direction of the arrow AR12 and in the opposite direction.

  The toothed belt member 20 is formed in an annular shape, and irregularities are formed on the inner peripheral surface 21. The unevenness corresponds to the shape of the outer peripheral surface 13 formed in a gear shape of the gear 12 and the shape of the outer peripheral surface 33 formed in a gear shape of the gear 32. The toothed belt member 20 is wound around the outer peripheral surfaces 13 and 33 so as to surround the outer peripheral surfaces 13 and 33. The toothed belt member 20 receives power from the gear 12 and can rotate in the direction of the arrow AR20 and in the opposite direction.

  3 and 4, support shaft 31 is fixedly supported by a predetermined frame (not shown). The pulley 54 is fixedly attached at a predetermined height position in the longitudinal direction (the vertical direction in FIG. 4) of the support shaft 31. The pulley 54 has a circular portion 54a (first circular portion) whose outer shape is circular. The gear 32 is disposed coaxially with the pulley 54 above the pulley 54.

  A bearing 50 is provided between the gear 32 and the support shaft 31. The gear 32 is rotatably supported by the bearing 50 around the support shaft 31. The gear 32 receives power from the toothed belt member 20, and can rotate in the direction of the arrow AR32a and in the opposite direction (AR32b direction in FIG. 1). When the gear 32 rotates, the support shaft 31 and the pulley 54 do not rotate.

  One end (upper side in FIG. 4) of the optical fiber 40 is connected to the oscillator 15 (see FIG. 1) and the detector 16 (see FIG. 1). The other end side (the lower side in FIG. 4) of the optical fiber 40 passes through a part of the gear 32 at a position separated from the support shaft 31. A bearing 70 is provided between the gear 32 and the optical fiber 40.

  The optical fiber 40 is rotatably supported by the gear 32 by the bearing 70. The bearing 70 allows the optical fiber 40 to rotate (rotate) in the direction of the arrow AR40 (see FIG. 1) and the opposite direction with respect to the gear 32.

  A pulley 74 is attached to the optical fiber 40 coaxially with the optical fiber 40 on the distal end side of the optical fiber 40 located on the lower surface side of the gear 32. The pulley 74 and the optical fiber 40 can be integrally rotated (spinned). Further, the pulley 74 and the optical fiber 40 can rotate (revolve) integrally around the support shaft 31 by the gear 32 rotating around the support shaft 31.

  As shown in FIG. 4, the pulley 74 is located at substantially the same height as the pulley 54. The pulley 74 has a circular portion 74a (second circular portion) whose outer shape is circular. The circular portion 54a of the pulley 54 and the circular portion 74a of the pulley 74 are configured to have the same diameter. The belt member 60 is wound around these so as to surround the outer peripheral surface of the circular portion 54a and the outer peripheral surface of the circular portion 74a.

  Referring to FIG. 5, a plurality of light projecting fibers 91 and light receiving fibers 92 are provided at the distal end portion 42 of the optical fiber 40 so as to be exposed. In the optical fiber 40 in the optical measurement apparatus 1A, twelve light projecting fibers 91 are arranged in a regular hexagonal shape, and seven light receiving fibers 92 are arranged so as to fill the inside thereof. In the optical measurement apparatus 1A, the light projecting fibers 91 and the light receiving fibers 92 are arranged point-symmetrically.

  With reference to FIG. 1 and FIG. 4, the measuring object unit 100 is arrange | positioned under the gearwheel 32 with respect to the optical measuring device 1A comprised as mentioned above. On the surface of the measurement target unit 100, a plurality of measurement objects 101 are arranged along the circumference. Each measurement object 101 is disposed so as to face the rotating (revolving) optical fiber 40 (the end portion 42 thereof).

(Operation of optical measuring apparatus 1A)
With reference to FIGS. 6-9, operation | movement of 1 A of optical measuring apparatuses is demonstrated. FIG. 6 is a plan view showing a first rotation state of the optical measurement apparatus 1A. FIG. 7 is a plan view showing a second rotation state of the optical measuring device 1A. FIG. 8 is a plan view showing a third rotation state of the optical measurement apparatus 1A. FIG. 9 is a plan view showing a fourth rotation state of the optical measuring device 1A.

  Referring to FIG. 6, in the first rotation state, gear 12 rotates in the direction of arrow AR12. The toothed belt member 20 rotates in the direction of the arrow AR20. The gear 32 rotates in the direction of the arrow AR32a. At this time, it is assumed that the gear 32 is rotated by an angle θ (for example, 90 °) during the time T in the arrow AR32a direction.

  As the gear 32 rotates, the pulley 74 revolves about the pulley 54 by an angle θ. The pulley 74 revolves in the arrow AR32a direction at the first angular velocity R1 (= angle θ / time T). At this time, the pulley 54 does not rotate even if the gear 32 rotates.

  As the pulley 74 revolves in the direction of the arrow AR32a, the pulley 74 tries to rotate (spin) in the direction of the arrow AR74b (the direction opposite to the direction of the arrow AR74a). In other words, the absolute phase in the rotation direction of the pulley 74 tends to change.

  The belt member 60 is wound around a pulley 54 that is fixedly arranged. While the absolute phase in the rotation direction of the pulley 74 is about to change, the belt member 60 acts to rotate the pulley 74 (the outer peripheral surface thereof) in the direction of the arrow AR60. As a result, the pulley 74 rotates (spins) at the second angular velocity R2 in the direction of the arrow AR74a as the pulley 74 revolves in the direction of the arrow AR32a. The first angular velocity R1 and the second angular velocity R2 are opposite in direction.

  In the optical measuring device 1A, the circular portion 54a and the circular portion 74a are configured to have the same diameter, and thus the first angular velocity R1 and the second angular velocity R2 have the same size (velocity distribution). When the gear 32 rotates in the direction of arrow AR32a by an angle θ during time T, the pulley 74 rotates with respect to the gear 32 in the direction of arrow AR74a by an angle (−θ) during time T. The belt member 60 acts on the pulley 74 so as to cancel an absolute phase change in the rotation direction of the pulley 74.

  As shown in the second rotation state in FIG. 7, the position of the reference position M (shown for convenience of explanation) has not changed from the first rotation state in FIG. In other words, the absolute phase in the rotation direction of the reference position M does not change before and after the gear 32 rotates by the angle θ, and is always located on the rightmost side of the page.

  Even if the gear 32 rotates, the absolute phase in the pulley 74 does not change, so the optical fiber 40 does not rotate (spin). According to the optical measuring device 1A, the optical fiber 40 is suppressed from being twisted.

  In the second rotation state in FIG. 7, it is assumed that the gear 32 is further rotated by an angle θ (90 °). The optical fiber 40 further revolves around the support shaft 31 by an angle θ in the direction indicated by the arrow AR32a.

  As shown in the third rotation state in FIG. 8, the position of the reference position M has not changed from the second rotation state in FIG. The absolute phase in the rotation direction of the reference position M is always located on the rightmost side of the page. The optical fiber 40 is not twisted before and after the gear 32 is rotated by the angle θ.

  Similarly, it is assumed that the gear 32 is further rotated by an angle θ (90 °) in the third rotation state in FIG. The optical fiber 40 further revolves around the support shaft 31 by an angle θ in the direction indicated by the arrow AR32a.

  As shown in the fourth rotation state in FIG. 9, the position of the reference position M has not changed from the third rotation state in FIG. 8. The absolute phase in the rotation direction of the reference position M is always located on the rightmost side of the page. The optical fiber 40 is not twisted before and after the gear 32 is rotated by the angle θ.

  According to the optical measuring apparatus 1A, even if the optical fiber 40 revolves around the support shaft 31 a plurality of times, the optical fiber 40 is not twisted.

  Since the optical fiber 40 is not twisted, the influence on the detection light 48a (see FIG. 4) guided in the light projecting fiber 91 and the reflected light 48b guided in the light receiving fiber 92 is prevented. The detection light 48a based on a desired setting condition generated in the oscillator 15 is guided by the light projecting fiber 91 while maintaining the setting condition, and is projected onto the measurement object 101 (see FIG. 4). . The reflected light 48b from the measurement object 101 is received by the light receiving fiber 92 and guided to the detector 16 (see FIG. 1) in a state where the spectrum indicating the characteristic of the measurement object 101 (light balance) is maintained. Lighted.

  According to the optical measuring apparatus 1A, since the optical fiber 40 is not twisted when the characteristics of the measurement object arranged along the circumference are measured using the optical fiber 40, the detection is performed. The characteristics (such as spectrum) of the light 48a and the reflected light 48b do not change. According to the optical measuring device 1A, it is possible to measure the characteristics (photometric data) of the measurement object with higher accuracy. According to the optical measuring apparatus 1A, since the optical fiber 40 is not twisted, the life of the optical fiber 40 can be extended.

  In the optical measuring apparatus 1A, the gear 12 and the gear 32 may be configured in a pulley shape, and the toothed belt member 20 may be configured in a rubber belt shape that does not have unevenness. The pulley 54 and the pulley 74 may be configured in a gear shape, and the belt member 60 may be configured in a toothed belt shape.

[Other configuration of the first embodiment]
In the above-described first embodiment, the optical fiber 40 (pulley 74) revolves around the support shaft 31 (pulley 54) in the direction of the arrow AR32a a plurality of times in response to the rotational power from the rotary drive device 10. explained.

  With reference to FIG. 1, the optical fiber 40 (pulley 74) may be configured such that the rotation direction is reversed every time it revolves once around the support shaft 31 (pulley 54). In other words, after the optical fiber 40 revolves once in the direction of the arrow AR32a, the optical fiber 40 reverses its rotation direction and revolves once in the direction of the arrow AR32b. The optical fiber 40 may be configured to repeat this rotation and reversal operation a plurality of times.

  In the case where the optical fiber 40 is configured to repeat the above rotation operation and reversal operation a plurality of times, the rotation angle of the optical fiber 40 is not limited to 360 °. For example, after the optical fiber 40 is rotated by 180 ° in the direction of the arrow AR32a, the optical fiber 40 is reversed in its rotation direction and rotated again by 180 ° in the direction of the arrow AR32b. The optical fiber 40 may be configured to repeat such rotation and reversal operations a plurality of times.

  Also about a rotation angle, it is not restricted to 180 degrees, 120 degrees may be sufficient, 90 degrees may be sufficient, and arbitrary angles can be employ | adopted. The rotation angle may be determined so as to correspond to the arrangement positions of the plurality of measurement objects 101 on the surface of the measurement object unit 100. In addition, the rotation angle may be determined so that only some of the measurement objects 101 among the plurality of measurement objects 101 are measured. For example, when ten measurement objects 101 are placed on the circumference of the measurement target unit 100, only the three measurement objects adjacent to each other among the ten measurement objects are measured. The rotation angle may be determined, or the rotation angle may be determined so as to intermittently measure only three measurement objects that are spaced apart.

  Regarding the number of times that the rotation operation and the reversal operation are performed, one rotation operation (in one direction) (360 °, 180 °, 120 °, etc.) is performed on one measurement target unit 100, and the measurement target unit After 100 is replaced with another measurement target unit 100, one reversal operation (in the direction opposite to the one direction) (−360 °, −180 °, −120 °, etc.) The unit 100 may be configured to be implemented. Depending on the measurement method, the number of times that the rotation operation and the reversal operation are performed on one measurement target unit 100 may be determined.

[Still another configuration of the first embodiment]
In the above-described first embodiment, the light projecting fiber 91 and the light receiving fiber 92 of the optical fiber 40 have been described based on the aspect that they are arranged point-symmetrically. The light projecting fiber 91 and the light receiving fiber 92 may be arranged asymmetrically.

  For example, eleven light projecting fibers 91 and eight light receiving fibers 92 may be arranged in line symmetry, as in an optical fiber 40A shown in FIG. In the optical fiber 40A, six projecting fibers 91 are arranged on the apex of the regular hexagon, three are linearly arranged inside, and two are arranged on both sides of the linear shape. Six light receiving fibers 92 are arranged on the side of the regular hexagon and two are arranged on the inner side.

  When the light projecting fiber 91 and the light receiving fiber 92 are arranged in line symmetry like the optical fiber 40A, the optical fiber 40A does not rotate (no twisting), so that the object to be measured can be obtained with higher accuracy. It is possible to measure characteristics (photometric data). The same applies to optical fibers 40B to 40D described below. Even when the light projecting fiber 91 and the light receiving fiber 92 are arranged asymmetrically, the optical fiber 40A does not rotate (no twist), so that the characteristics of the measurement object (with higher accuracy) ( Photometric data) can be measured.

  As in the optical fiber 40B shown in FIG. 11, eight light projecting fibers 91 and eleven light receiving fibers 92 may be arranged in line symmetry. In the optical fiber 40B, three light receiving fibers 92 are arranged in a straight line, four light projecting fibers 91 are arranged in a straight line adjacent thereto, and five light receiving fibers are arranged adjacent to the four light projecting fibers 91. The fibers 92 are arranged in a straight line. The light projecting fiber 91 and the light receiving fiber 92 are symmetrically arranged with the five light receiving fibers 92 interposed therebetween.

  As in the optical fiber 40C shown in FIG. 12, eight light projecting fibers 91 and eight light receiving fibers 92 may be arranged in line symmetry. In the optical fiber 40C, the light projecting fibers 91 and the light receiving fibers 92 are arranged in a staggered pattern within a quadrangular shape.

  As in the optical fiber 40D shown in FIG. 13, eight light projecting fibers 91 and eight light receiving fibers 92 may be arranged in line symmetry. In the optical fiber 40D, four light projecting fibers 91 arranged in a straight line and four light receiving fibers 92 arranged in a straight line are arranged alternately in a quadrangular shape. ing.

  Even when the light projecting fiber 91 and the light receiving fiber 92 are arranged line-symmetrically like the optical fibers 40A to 40D, the optical fibers 40A to 40D do not rotate (no twist), It becomes possible to measure the characteristics (photometric data) of the measurement object with higher accuracy. Even when the light projecting fiber 91 and the light receiving fiber 92 are arranged asymmetrically, the optical fibers 40A to 40D do not rotate (no twisting), so that the characteristics of the measurement object (with higher accuracy) ( Photometric data) can be measured.

[Embodiment 2]
(Configuration of optical measuring device 1B)
With reference to FIG. 14 and FIG. 15, the optical measuring device 1B in this Embodiment is demonstrated. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described. FIG. 14 is a plan view showing the upper side of the optical measurement apparatus 1B. 15 is a cross-sectional view taken along line XV-XV in FIG.

  The optical measuring device 1B uses a gear 55 (fixed body), a gear 75 (rotating body), and a gear instead of the pulley 54, the pulley 74, and the belt member 60 in the optical measuring device 1A of the first embodiment. 61 is provided.

  The gear 55 is fixedly attached to the support shaft 31 at a predetermined height position in the longitudinal direction (the vertical direction in FIG. 15). The gear 55 has a gear portion 55a (first gear portion) formed in a gear shape. The gear 32 is arranged coaxially with the gear 55 above the gear 55. When the gear 32 rotates, the gear 55 does not rotate.

  A gear 75 is attached to the optical fiber 40 coaxially with the optical fiber 40 on the distal end side of the optical fiber 40 located on the lower surface side of the gear 32. The gear 75 and the optical fiber 40 can be integrally rotated (spinned). Further, the gear 75 and the optical fiber 40 can rotate (revolve) integrally around the support shaft 31 as the gear 32 rotates around the support shaft 31.

  The gear 75 is located at substantially the same height as the gear 55. The gear 75 has a gear portion 75a (second gear portion) whose outer shape is a gear shape. The gear portion 55a of the gear 55 and the gear portion 75a of the gear 75 are configured to have the same diameter.

  The gear 61 corresponds to the shape of the outer peripheral surface of the gear portion 55a and the outer peripheral surface of the gear portion 75a, and is rotatably held between the gear portion 55a and the gear portion 75a.

(Operation of the optical measuring device 1B)
Referring to FIG. 14, gear 12 rotates in the direction of arrow AR12. The toothed belt member 20 rotates in the direction of the arrow AR20. The gear 32 rotates in the direction of the arrow AR32a.

  As the gear 32 rotates, the gear 75 revolves around the gear 55 in the direction of the arrow AR32a by an angle θ (first angular velocity R1). At this time, even if the gear 32 rotates, the gear 55 does not rotate.

  As the gear 75 revolves in the direction of the arrow AR32a, the gear 75 tries to rotate (spin) in the direction of the arrow AR75b. In other words, the absolute phase in the rotation direction of the gear 75 tends to change.

  The gear 61 is rotatably held between the gear 55 and the gear 75 by them. While the absolute phase in the rotation direction of the gear 75 is about to change, the gear 61 revolves in the direction of the arrow AR32a while rotating in the direction of the arrow AR61. The gear 61 acts to rotate the gear 75 in the direction of the arrow AR75a on the contact surface with the gear 75. As a result, the gear 75 rotates (spins) at the second angular velocity R2 in the direction of the arrow AR75a as the gear 75 revolves in the direction of the arrow AR32a. The first angular velocity R1 and the second angular velocity R2 are opposite in direction.

  In the optical measuring device 1B, the gear portion 55a and the gear portion 75a are configured to have the same diameter, and therefore the first angular velocity R1 and the second angular velocity R2 have the same magnitude (speed distribution). When the gear 32 rotates in the direction of the arrow AR32a by the angle θ during the time T, the gear 75 rotates with respect to the gear 32 by the angle (−θ) in the direction of the arrow AR75a during the time T. The gear 61 acts on the gear 75 so as to cancel the absolute phase change in the rotation direction of the gear 75.

  Even if the gear 32 rotates, the absolute phase in the gear 75 does not change, so the optical fiber 40 does not rotate (spin). The optical measurement apparatus 1 </ b> B also prevents the optical fiber 40 from being twisted. As a result, it is possible to obtain the same effect as that of the optical measurement apparatus 1A in the first embodiment.

  Similar to the other configuration of the first embodiment, after the optical fiber 40 revolves once in the direction of the arrow AR32a, the optical fiber 40 reverses its rotation direction and revolves once in the direction of the arrow AR32b, and these are repeated. It may be configured to be configured. Similarly to the other configuration of the first embodiment described above, in the optical fiber 40, the light projecting fiber 91 and the light receiving fiber 92 may be arranged in line symmetry.

[Other configurations of the second embodiment]
With reference to FIG. 16 and FIG. 17, an optical measurement device 1 </ b> C in another configuration of the second embodiment will be described. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described. FIG. 16 is a plan view showing the upper side of the optical measuring device 1C. 17 is a cross-sectional view taken along the line XVII-XVII in FIG.

  The optical measuring device 1C includes a connecting member 12A and a disk member 32A instead of the gear 12, the gear 32, and the toothed belt member 20 in the optical measuring device 1A of the first embodiment. The disk member 32A is configured in substantially the same manner as the gear 32. The outer peripheral surface 33 of the disk member 32A may not be configured in a gear shape. For convenience of illustration, the rotary drive device 10 and the rotary shaft 11 are shown only in FIG. 17, and FIG. 16 schematically shows the connecting member 12A (only the lower end side).

  In the optical measuring device 1C, the rotation driving device 10 is disposed above the disk member 32A (see FIG. 17). The rotating shaft 11 suspending from the rotation driving device 10 is arranged coaxially with the support shaft 31. A connecting member 12 </ b> A is attached to the lower portion of the rotating shaft 11. The connecting member 12 </ b> A receives rotational power from the rotary drive device 10 through the rotary shaft 11. The connecting member 12A can rotate together with the rotating shaft 11 in the direction of the arrow AR12A and in the opposite direction.

  The lower end of the connecting member 12A is formed in an annular shape and is connected to the upper surface of the disk member 32A. The disk member 32A receives power from the connecting member 12A and can rotate in the direction of the arrow AR32Aa and in the opposite direction.

  As in the optical measuring device 1C, the power from the rotation driving device 10 is directly transmitted to the disk member 32A that supports the optical fiber 40 (so that the power is transmitted without the belt member 60 or the like). Even if it is a simple structure), the effect similar to the optical measuring device 1A in the above-mentioned Embodiment 1 can be obtained. Even if the optical fiber 40 revolves around the support shaft 31 a plurality of times, the optical fiber 40 is not twisted. Further, according to the optical measuring device 1C, it is possible to save space in the plane direction.

[Still another configuration of the second embodiment]
With reference to FIG. 18 and FIG. 19, an optical measurement apparatus 1D in still another configuration of the second embodiment will be described. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described. FIG. 18 is a plan view showing the upper side of the optical measuring device 1D. 19 is a cross-sectional view taken along line XIX-XIX in FIG.

  The optical measurement device 1D includes a gear 12B and a gear 32B instead of the gear 12, the gear 32, and the toothed belt member 20 in the optical measurement device 1A of the first embodiment described above. The gear portion 12Ba formed on the outer peripheral surface 13 of the gear 12B corresponds to the gear portion 32Ba formed on the outer peripheral surface 33 of the gear 32B. The gear 12B and the gear 32B are arranged so that the gear portion 12Ba and the gear portion 32Ba are engaged with each other.

  The gear 12 </ b> B receives rotational power from the rotary drive device 10 through the rotary shaft 11. The gear 12B is rotatable with the rotary shaft 11 in the direction of the arrow AR12B and in the opposite direction. The gear 32B receives power from the gear 12B and can rotate in the direction of the arrow AR32Ba and in the opposite direction.

  According to the optical measurement apparatus 1D, as in the optical measurement apparatus 1A in the first embodiment described above, even if the optical fiber 40 revolves around the support shaft 31 a plurality of times, the optical fiber 40 is not twisted. Absent. According to the optical measuring device 1D, it is possible to save space in the plane direction.

[Embodiment 3]
With reference to FIG. 20, the optical measuring device 1E in this Embodiment is demonstrated. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described.

  In the optical measuring device 1E, the pulley 74 extends toward the distal end portion 42 side of the optical fiber 40 (so as to approach the measurement target unit 100). The inside of the pulley 74 is formed hollow, and a polarizing element 80 is provided on the lower end side of the pulley 74. The polarizing element 80 includes a lens unit 81, a housing 82, and a polarizing filter 83 (polarizing prism).

  The detection light 48 a projected from the light projecting fiber 91 of the optical fiber 40 passes through the lens unit 81 and is polarized to a specific wavelength by the polarization filter 83. The detection light 48a is projected onto the measurement object 101 in a polarized state. The reflected light 48b from the measurement object 101 passes through the polarizing element 80 again and is guided to the detector 16 (see FIG. 1) by the light receiving fiber 92.

  By providing the polarization element 80 integrally with the pulley 74 as in the optical measurement apparatus 1E, the optical fiber 40 is not twisted, and the relative rotation direction of the optical fiber 40 and the polarization element 80 is relatively small. The positional relationship does not change. According to the optical measurement apparatus 1E, even when the polarizing element 80 is used, it is possible to measure the characteristics (photometric data) of the measurement object with higher accuracy.

[Other configuration of the third embodiment]
With reference to FIG. 21, an optical measuring device 1F in another configuration of the third embodiment will be described. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described.

  In the optical measurement device 1F, the pulley 74 extends toward the distal end portion 42 side of the optical fiber 40 (so as to approach the measurement target unit 100). The inside of the pulley 74 is formed hollow, and a condenser lens 85 is provided on the lower end side of the pulley 74.

  The detection light 48a projected from the light projecting fiber 91 of the optical fiber 40 passes through the condenser lens 85 and is projected onto the measurement object 101 in a condensed state. The reflected light 48b from the measurement object 101 passes through the condenser lens 85 again and is guided to the detector 16 (see FIG. 1) by the light receiving fiber 92.

  By providing the condensing lens 85 integrally with the pulley 74 as in the optical measuring device 1F, the optical fiber 40 is not twisted, and the optical fiber 40 and the condensing lens 85 are relatively aligned in the rotational direction. The physical positional relationship does not change. According to the optical measurement apparatus 1F, even when the condensing lens 85 is used, it is possible to measure the characteristics (photometric data) of the measurement object with higher accuracy.

[Still another configuration of the third embodiment]
With reference to FIG. 22, an optical measurement apparatus 1G in still another configuration of the third embodiment will be described. Here, differences from the optical measurement apparatus 1A in the first embodiment will be described.

  In the optical measurement apparatus 1G, the lower end portion 40a of the optical fiber 40 is configured to have a large hollow diameter, and the light projecting fiber 91 and the light receiving fiber 92 are disposed inside the lower end portion 40a. The light projecting fiber 91 and the light receiving fiber 92 are exposed from the opening 79 provided in the lower end portion 40a. The light projecting fiber 91 and the light receiving fiber 92 extend to the vicinity of the measurement object 101.

  The detection light 48 a projected from the projecting fiber 91 of the optical fiber 40 passes through the inside of the lower end portion 40 a and is projected from the vicinity of the measurement target 101 to the measurement target 101. The reflected light 48b from the measurement object 101 passes through the lower end portion 40a again and is guided to the detector 16 (see FIG. 1) by the light receiving fiber 92.

  Even if the optical fiber 40 is extended to the vicinity of the measurement object 101 as in the optical measurement apparatus 1G, the optical fiber 40 is not twisted. According to the optical measurement apparatus 1G, even when the light projecting fiber 91 and the light receiving fiber 92 are arranged close to the measurement object 101, the characteristics (photometric data) of the measurement object are measured with higher accuracy. It is possible.

  As mentioned above, although each embodiment for carrying out the invention of the present invention was described, each embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1A to 1G Optical measuring device, 10 Rotation drive device, 11 Rotating shaft, 12, 12B, 32, 32B, 55, 61, 75 Gear, 12A Connecting member, 12Ba, 32Ba, 55a, 75a Gear portion, 13, 33 Outer circumference Surface, 15 Oscillator, 16 Detector, 20 Toothed belt member, 21 Inner circumferential surface, 31 Support shaft, 32A Disk member, 40, 40A to 40D Optical fiber, 40a Lower end, 42 Front end, 48a Detection light, 48b Reflection Light, 50, 70 Bearing, 54, 74 Pulley, 54a, 74a Circular part, 60 Belt member, 79 Opening part, 80 Polarizing element, 81 Lens part, 82 Case, 83 Polarizing filter, 85 Condensing lens, 91 Light projection Fiber, 92 light receiving fiber, 100 measuring unit, 101 measuring object, R1 first angular velocity, R2 second Speed, M reference position, theta angle.

Claims (4)

An optical measurement device that measures the characteristics of a plurality of measurement objects arranged side by side along the circumference using an optical fiber,
A fixed body,
A rotating body capable of rotating at a second angular velocity while revolving around the fixed body at a first angular velocity;
The held by the rotary body, and a said optical fiber for receiving light reflected from the object to be measured while projecting a detection light to a plurality of the measurement object,
It said first angular velocity and the second angular velocity, Ri is the same and orientation opposite der size,
When measuring the characteristics, the plurality of measurement objects arranged below the optical fiber are fixed, and the optical fiber is relative to the plurality of measurement objects along the circumferential direction. The detection light is projected to each measurement object from the optical fiber that is moved and relatively moved, and the optical fiber receives reflected light from each measurement object,
A rotatable first gear located above the fixed body and provided coaxially with the fixed body;
It is provided so as to penetrate both the fixed body and the first gear, and is fixed to the fixed body, and rotates the first gear via a bearing provided between the fixed body and the first gear. A support shaft that freely supports,
A rotatable second gear that is positioned adjacent to the first gear in the horizontal direction and is spaced from the first gear;
A toothed belt member wound around the outer peripheral surface of the first gear and the outer peripheral surface of the second gear;
A rotation drive device for applying rotational power to the second gear,
The rotating body is provided on the lower surface side of the first gear,
The optical fiber is provided so as to penetrate the first gear and the rotating body in order at a position separated from the support shaft,
The optical fiber is fixed to the rotating body, and is rotatably supported by the first gear via another bearing provided between the optical fiber and the first gear.
Optical measuring device. The fixed body has a first circular portion having a circular outer shape,
The rotating body has a second circular portion having a circular outer shape,
The first circular portion and the second circular portion have the same diameter,
An annular belt member surrounding the outer peripheral surface of the first circular portion and the outer peripheral surface of the second circular portion;
The optical measurement apparatus according to claim 1. The fixed body has a first gear portion formed in a gear shape,
The rotating body has a second gear portion formed in a gear shape having the same diameter as the first gear portion,
A gear disposed between the first gear portion and the second gear portion;
The optical measurement apparatus according to claim 1. Each time the rotating body revolves a predetermined angle around the fixed body, the revolving direction of the rotating body is reversed.
The optical measuring device according to claim 1.

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