JP5603376B2 - Sample holder - Google Patents

Description

  The present invention relates to a sample holder that is detachable from an integrating sphere for observing light to be measured generated by irradiating a sample in a sample container with excitation light.

An integrating sphere is used to measure the light intensity of the sample in which the light to be measured is generated radially. In the integrating sphere, a high diffuse reflection powder is applied to the spherical inner wall of the main body, and when the light to be measured is generated radially from the sample, the light to be measured is multiple diffusely reflected by the high diffuse reflection powder. Then, the diffusely reflected light is incident on the photodetector, and the output signal is guided to the light intensity meter to measure the intensity of the light to be measured. Such integrating spheres are disclosed in the following Patent Documents 1 to 3.
The sample measured by the integrating sphere is accommodated in a glass reaction tube (sample container) called an optical cell, and this cell is inserted into the integrating sphere while being attached to the sample holder. This sample holder is divided into two parts as disclosed in Patent Document 4, for example. And the cell is fixed to the sample holder by sandwiching a rod-shaped branch pipe extending from the cell between one sample holder half and the other sample holder half, and connecting the sample holder halves with screws, Moreover, a cell can be removed from a sample holder by removing a screw.

Japanese Patent No. 2517102 Japanese Patent No. 2811565 Japanese Patent Publication No.54-35114 JP 2007-86031 A

However, when various types of samples are measured with an integrating sphere in a short time, it is necessary to quickly attach the cell to the sample holder. Conventionally, screws are used as means for attaching the cell to the sample holder. since, there has been a problem that it takes time to work for attaching the cell Le to the sample holder.

An object of this invention is to provide the sample holder which made the attachment workability | operativity of the sample container with respect to a holding | maintenance part favorable .

The present invention provides a sample holder that is detachably attached to an integrating sphere for observing light to be measured generated by a sample in a sample container.
A holding part having an elastic member for sandwiching the sample container;
A fixing member that pressurizes the holding part by fitting the holding part,
The elastic member presses the sample container by pressurization by the fixing member, and the holding unit holds the sample container.

  In addition, it is preferable that the holding portion has a flange portion attached to the integrating sphere, and the elastic member is positioned above the flange portion.

  In addition, the holding portion includes a first half and a second half, and the elastic member is provided in the first elastic member provided in the first half and the second half. Preferably, the sample container is composed of a second elastic member, and the sample container is sandwiched between the first elastic member and the second elastic member.

  The holding part has a first end part on the side inserted into the integrating sphere and a second end part arranged outside the integrating sphere, and the position where the fixing member presses the holding part is The center position of the first elastic member and the center position of the second elastic member are preferably closer to the first end of the holding portion.

  In addition, the outer surface of the holding portion is provided with an overhanging portion that is fitted into the fixing member and pressed, and a convex portion that presses the overhanging portion is formed on the inner peripheral surface of the fixing member. It is preferable that an elastic member for holding the sample container is provided and the elastic member and the overhanging portion are arranged to face each other in the direction in which the holding portion is pressurized.

  Further, it is preferable that the projecting portion is formed with a tapered portion on the insertion side to the fixing member.

According to the present invention, it is favorably ing mounting workability of the sample container relative to the holding portion.

It is sectional drawing which shows the state which mounted | wore the integrating sphere with the sample holder which concerns on this invention. It is a disassembled perspective view which shows the sample holder which concerns on this invention. It is a perspective view which shows the sample holder and optical cell which concern on this invention. It is sectional drawing which shows the sample holder which concerns on this invention. It is a front view which shows the state which the V-shaped clearance gap has generate | occur | produced between the 1st half part and the 2nd half part. It is a bottom view of a holding part. It is a perspective view which shows the jig | tool for sample holders. It is a perspective view which shows the state which opened the open / close arm of the sample holder. It is a perspective view which shows the baseplate fixed to a jig | tool. It is a top view of a jig | tool. It is a perspective view which shows the state which set the holding part and the optical cell to the jig | tool. It is a perspective view which shows the state which the setting of the optical cell with respect to the sample holder was completed using the jig | tool. It is a top view which shows rotation of a cap. It is sectional drawing which shows other embodiment of the sample holder which concerns on this invention. It is a disassembled perspective view which shows other embodiment of the sample holder which concerns on this invention.

  Hereinafter, a preferred embodiment of a sample holder according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, an optical detection apparatus 1 includes an integrating sphere 2 that observes light to be measured generated by irradiating a sample with excitation light, and a sample holder 4 that is detachably attached to the integrating sphere 2 with screws. , 6, an excitation light optical fiber holder 3 for introducing the excitation light into the integrating sphere 2, a light detection light fiber holder (not shown) for acquiring the measured light, and two ground planes 7 a and 7 b And an L-shaped gantry 7. The integrating sphere 2 is attached to the gantry 7 with attachment screws 8.

  When measuring the sample held in the sample holder 4, the light detection device 1 is set with the grounding surface 7a of the gantry 7 facing down so that the optical axis L of the excitation light is along the vertical line. Here, the sample holder 4 is mainly used for measurement of solid samples, powder samples, etc., and these samples S may be held on the sample holder 4 in a form applied to a substrate such as glass, You may hold | maintain at the sample holder 4 with the form accommodated in the container.

  An optical fiber (not shown) attached to the excitation light optical fiber holder 3 is connected to an excitation light source (not shown). The excitation light emitted from the excitation light source is guided to the lens of the optical fiber holder 3 for excitation light through the optical fiber. The excitation light is guided along the optical axis L into the integrating sphere 2 and is irradiated onto the sample S placed on the sample holder 4.

  When the sample S is irradiated with excitation light, light to be measured is generated from the sample S that has absorbed the excitation light. The measured light is multiple diffusely reflected by a diffuse reflector such as barium sulfate coated on the inner wall of the integrating sphere 2. The diffusely reflected measurement light is incident on an optical fiber attached to an optical fiber holder for light detection (not shown). The optical fiber is connected to a photodetector, for example, a multichannel photodetector (not shown). Therefore, the light to be measured is guided to the multi-channel photodetector through the optical fiber, the measurement data detected by the multi-channel photodetector is processed, and the measured value of the intensity of the light to be measured is displayed on the monitor.

  The sample holder 6 is mainly used for measurement of the liquid sample R in which a pigment or the like is dissolved, and the sample R is held by the sample holder 6 in a form housed in a glass container called an optical cell 9. The optical cell 9 includes a rectangular column-shaped hollow cell main body 9a in which the sample R is accommodated, and a rod-shaped branch tube 9b extending in a tubular shape from the cell main body 9a. This sample holder 6 is fixed to a pedestal 2a provided on the integrating sphere 2 via a screw, and when measuring the sample R, the ground surface 7b of the gantry 7 so that the optical axis L of the excitation light is along the horizontal line. The light detection device 1 is set in a state in which

  When excitation light emitted from an optical fiber (not shown) attached to the optical fiber holder 3 for excitation light is irradiated to the solution sample R accommodated in the optical cell (sample container) 9, the excitation light is emitted. The light to be measured is generated from the solution sample R that has absorbed. The measured light is multiple diffusely reflected by a diffuse reflector such as barium sulfate coated on the inner wall of the integrating sphere 2. The diffusely reflected measurement light is incident on an optical fiber attached to an optical fiber holder for light detection (not shown). The optical fiber is connected to a photodetector, for example, a multichannel photodetector (not shown). Therefore, the light to be measured is guided to the multi-channel photodetector through the optical fiber, the measurement data detected by the multi-channel photodetector is processed, and the measured value of the intensity of the light to be measured is displayed on the monitor.

  Next, the sample holder 6 will be described in detail.

  As shown in FIGS. 2 to 4, the sample holder 6 includes a holding unit 10 that sandwiches a branch tube 9 b of a glass optical cell (sample container) 9, and the center of the holding unit 10 from the outer surface 10 a of the holding unit 10. The holding portion 10 is pressurized inwardly toward the inner side, and includes a fixing member 11 made of metal (for example, aluminum) that holds the branch pipe 9b of the cell 9 by the holding portion 10.

  The cylindrical holding part 10 includes a first half part 12 and a second half part 13 that enable the branch pipe 9b of the cell 9 to be held, and the first half part 12 and the second half part 13 are provided. Have substantially the same shape, and each half body 12P, 13P is formed of metal (for example, aluminum). The first half 12 includes an upper portion 12A in which a first elastic member 14 made of silicon resin is fixed to the upper half of the half main body 12P, and a light diffusing reflector (for example, Spectralon (trade name of Labsphere) )) Has a lower side part 12B fixed to the lower side of the half body 12P, and a first flange part 16 formed between the upper side part 12A and the lower side part 12B. doing.

  Similarly, the second half 13 includes an upper portion 13A in which a second elastic member 17 made of silicon resin is fixed to the upper half of the half body 13P, and a light diffusing reflector (for example, Spectralon (Labsphere) The second flange portion 19 is formed between the lower side portion 13B in which the light reflecting portion 18 composed of the product name)) is fixed to the lower side of the half body 13P and the upper side portion 13A and the lower side portion 13B. And have. When the first half 12 and the second half 13 are brought into contact with each other, a through hole 10A having a diameter substantially the same as that of the branch pipe 9b of the cell 9 is formed in the center of the holding part 10 (see FIG. 6).

  The first elastic member 14 is accommodated in a quadrangular prism-shaped recess 20 a formed in the upper portion 12 </ b> A of the first half 12. The first elastic member 14 is bonded and fixed to a rectangular resin base plate 21, and the base plate 21 is fixed to the bottom wall surface of the recess 20a by a screw 22 reaching from the outside of the upper portion 12A to the recess 20a. By adopting the screw 22, the first elastic member 14 can be replaced. Further, the first half 12 is formed with a semi-cylindrical recess 20b extending from the recess 20a toward the lower end. Similarly, the second elastic member 17 is housed in a quadrangular prism-shaped recess 23 a formed in the upper portion 13 </ b> A of the second half 13. The second elastic member 17 is bonded and fixed to a rectangular resin base plate 24, and the base plate 24 is fixed to the bottom wall surface of the recess 23a by a screw 25 reaching the recess 23a from the outside of the upper portion 13A. By adopting the screw 25, the second elastic member 17 can be replaced. Furthermore, the second half 13 is formed with a semi-cylindrical recess 23b extending from the recess 23a toward the lower end.

  The upper part of the light reflecting portion 15 is inserted into a recess 26 formed at the lower end of the lower side portion 12B of the first half 12, and the light reflecting portion 15 is a screw (from the outside of the lower side portion 12B to the recess 26 ( The light reflecting portion 15 can be exchanged by using screws and being fixed to the lower side portion 12B. Similarly, the upper part of the light reflecting part 18 is inserted into the recessed part 28 formed at the lower end of the lower side part 13B of the second half part 13, and the light reflecting part 18 extends from the outside of the lower side part 13B to the recessed part 28. It is fixed to the lower side portion 13B by a reaching screw 18a, and the light reflecting portion 18 is replaceable by using the screw 18a.

  The mating surface 12 a of the first half 12 is provided with a cylindrical protrusion 30, and the mating surface 13 a of the second half 13 is provided with a cylindrical recess 31. When the mating surface 12a of the first half 12 and the mating surface 13a of the second half 13 are brought into contact with each other, the protrusion 30 enters the recess 31 and the second half with respect to the first half 12 is obtained. The half portion 13 is prevented from being displaced, and the branch tube 9b of the cell 9 can be securely held between the first elastic member 14 and the second elastic member 17.

  The use of the elastic members 14 and 17 is suitable for fixing the optical cell (sample container) 9 formed of a material easily damaged such as glass or plastic to the holding unit 10. Furthermore, since the elastic members 14 and 17 are firmly pressed against the branch pipe 9b of the cell 9, the cell 9 can be reliably fixed to the holding portion 10.

  As shown in FIGS. 2 to 5, the first half portion 12 and the second half portion 13 are in contact with each other, and the branch pipe 9 b of the cell 9 by the first elastic member 14 and the second elastic member 17. A cap (fixing member) 11 is used in order to maintain the clamping state. The cap 11 is placed on the holding unit 10 so as to cover the holding unit 10. An opening 11b through which the branch pipe 9b is inserted is formed in the top wall 11a of the cap 11, and a substantially L-shaped cut extending from the opening 11b to the free end of the outer peripheral wall 11c is formed in the outer peripheral wall 11c of the cap 11. A notch 32 is formed. And the width W of the notch part 32 is larger than the diameter D of the branch pipe 9b. Therefore, since the branch pipe 9b of the cell 9 can be inserted from the cutout portion 32 of the cap 11, workability when the cap 11 is attached to the holding portion 10 is improved.

  As shown in FIGS. 4 and 5, the branch pipe 9 b of the cell 9 is inserted from the notch 32 of the cap 11, and the branch pipe 9 b reaches the opening 11 b of the cap 11. Thereafter, the cap 11 is pushed down along the branch pipe 9b, so that the first half 12 and the second half 13 opened in a V-shape are brought into contact with each other, and the elastic members 14 and 17 are connected to the branch pipe of the cell 9. It is pressed against 9b. In this case, the cap 11 pressurizes the holding unit 10 from the outer peripheral wall 11c of the holding unit 10 toward the inside of the holding unit 10, that is, toward the central axis Y passing through the through hole 10A (see FIG. 6).

  In addition, a C-shaped convex portion 33 is provided at the lower end of the inner peripheral surface 11 d of the cap 11 so as to contact the ring-shaped protruding portion 10 b formed on the outer surface 10 a of the holding portion 10. Since the convex portion 33 is pressed against the surface of the protruding portion 10 b of the holding portion 10, it contributes to preventing the cap 11 from coming off, and the elastic members 14 and 17 are firmly pressed against the branch pipe 9 b of the cell 9.

  Further, in the holding unit 10, when the side inserted into the integrating sphere 2 is a first end 10 c and the side arranged outside the integrating sphere 2 is a second end 10 d, the cap 11 is held by the holding unit 10. 10, that is, the position at which the convex portion 33 of the cap 11 presses the protruding portion 10 b of the holding portion 10 is more than the center position of the first elastic member 14 and the center position G2 of the second elastic member 17. The first end 10c of the holding unit 10 is approaching.

  Accordingly, since the holding portion 10 is pressurized by the cap 11 on the first end portion 10c side inserted into the integrating sphere 2, the first half portion 12 and the second half portion 13 are connected to the first end portion 10c. The contact can be made on the end 10c side. As a result, the gap between the first half 12 and the second half 13 on the first end 10c side can be eliminated, whereby the light in the integrating sphere 2 is held by the holding unit 10. Leakage from the air is prevented, and measurement errors are prevented.

  As shown in FIG. 4, a gap A is provided between the inner peripheral surface 11 d of the cap 11 and the outer peripheral surface 10 a of the holding unit 10. As shown in FIG. 5, the gap A is provided at the upper end of the overhanging portion 10b with the holding portion 10 opened in a V shape at the first half portion 12 and the second half portion. The cap 11 can be covered from the top up to the tapered portion 10e. From this state, by pushing down the cap 11 in the direction of the arrow B, the first half 12 opened in a V shape while the convex portion 33 of the cap 11 presses the protruding portion 10b of the holding portion 10 inward. The mating surface 12a and the mating surface 13a of the second half 13 are abutted. Therefore, the cap 11 can be fitted into the holding portion 10 so as to be pressed from above, and the cap 11 can be mounted with one touch.

  As shown in FIG. 2, a mushroom-shaped retaining pin (a retaining means) 35 protrudes from the top of the first half 12 of the holding portion 10. The top wall 11a of the cap 11 is formed with a cap-rotating groove 36 that extends from the opening 11b and allows the pin 35 to pass therethrough. As shown in FIG. 13, when the cap 11 is rotated in the direction of arrow C, the pin 35 enters the groove portion 36, and the cap 11 does not fall out of the holding portion 10 by the head portion 35 a of the pin 35.

  The sample holder 6 employs a cap 11 that pressurizes the holding unit 10 from the outer peripheral surface 10 a of the holding unit 10 toward the inside of the holding unit 10 and clamps the branch tube 9 b of the cell 9 by the holding unit 10. Yes. Thus, the cap 11 is easy to attach to the holding unit 10, and the workability of attaching the cell 9 to the holding unit 10 is improved. In addition, the force that pressurizes the holding unit 10 from the outer peripheral surface 10 a of the holding unit 10 toward the inside is optimal for firmly fixing the cell 9 to the holding unit 10. Since the cell 9 can be quickly attached to the sample holder 6, various types of samples can be measured with the integrating sphere 2 in a short time.

  Instead of the cap employed as the fixing member described above, a band-shaped fastening band or clip formed of an elastic material made of metal or resin may be used.

  The sample holder jig 40 for adjusting the relative positional relationship between the sample holder 6 and the optical cell 9 will be described in detail.

  7 to 9, the jig 40 includes a jig body (first member) 41 on which the first half 12 of the holding unit 10 is placed on the upper surface 41a, and the holding unit 10. An opening / closing arm (second member) 42 on which the second half 13 is placed on the upper surface 42 a and the upper end of the jig body 41 in order to open / close the opening / closing arm 42 horizontally with respect to the jig body 41. And a hinge portion 43 for connecting the end portion of the open / close arm 42.

  On the lower end side of the cell housing space P of the semi-cylindrical jig main body 41, the jig main body 41 is fixed with a position adjusting plate 44 having a rectangular hole 44a in which the cell main body 9a is to be fitted. The relative positional relationship between the sample holder 6 and the optical cell 9 is adjusted by entering the cell main body 9a into 44a. A circular bottom plate 45 is screwed to the lower end of the jig body 41, and the bottom surface of the cell body 9a is placed on the bottom plate 45.

  A first positioning recess 46 into which the first flange portion 16 provided in the first half 12 of the holding portion 10 is fitted is formed on the upper surface 41 a of the jig body 41. A second positioning recess 47 into which the second flange portion 19 provided in the second half portion 13 of the holding portion 10 is fitted is formed on the upper surface 42 a of the open / close arm 42. By fitting the flange portions 16 and 19 into the recesses 46 and 47 from above, the relative position of the jig 40 and the holding portion 10 of the sample holder 6 is adjusted.

  As described above, the formation of the first and second positioning recesses 46 and 47 on the upper surfaces 41a and 42a of the jig 40 is effective for the own weight of the holding portion 10 and the first and second flange portions 16 and 19. Can be used. Further, the flange portions 16 and 19 enhance the seating stability of the first and second half portions 12 and 13 placed on the upper surfaces 41 a and 42 a of the jig 40.

  As shown in FIG. 10, in the first positioning recess 46, the upper surface 41 a of the jig main body 41 has a first hole provided in the bottom surface of the first flange portion 16 of the first half 12. A first fall prevention pin 52 to be inserted into the portion 51 (see FIG. 6) is provided. Similarly, in the second positioning recess 47, a second hole 53 (see FIG. 6) provided on the bottom surface of the second flange portion 19 of the second half 13 is formed on the upper surface 42 a of the open / close arm 42. ) Is provided with a second fall prevention pin 54.

  Then, the first and second flange portions 16 and 19 of the first and second half portions 12 and 13 are fitted into the first and second positioning concave portions 46 and 47 of the jig 40 from above. The first fall prevention pin 52 enters the hole 51 of the first flange portion 16, and the second fall prevention pin 54 enters the hole 53 of the first flange portion 19. With such a configuration, as shown in FIG. 11, with the first half 12 placed on the jig body 41 and the second half 13 placed on the opening / closing arm 42, the opening / closing arm 42 is moved horizontally. Even if the first and second halves 12 and 13 are not dropped from the jig body 41 and the opening / closing arm 42, the weights of the first and second halves 12 and 13 are utilized. The first and second halves 12 and 13 can be reliably placed on the jig body 41 and the open / close arm 42.

  Further, a pin 55 functioning as a mark is provided on the upper surface 41a of the jig body 41, and a notch groove 56 that allows the pin 55 to be inserted into the first flange portion 16 of the first half portion 12. (See FIG. 6). With this configuration, it is possible to prevent the second half 13 from being erroneously attached to the upper surface 41 a of the jig body 41, and the first and second halves 12 and 13 to the jig body 41 and the opening / closing arm 42. Workability at the time of mounting is improved.

  A procedure for attaching the cell 9 to the sample holder 6 will be briefly described.

  As shown in FIG. 11, the first half 12 is placed on the jig body 41, the second half 13 is placed on the open / close arm 42, and in this state, the open / close arm 42 is opened in the horizontal direction. Then, the cell body 9a is inserted into the hole 44a of the position adjusting plate 44 provided in the jig 40 from above (see FIG. 10). Thereafter, as shown in FIG. 12, the open / close arm 42 is closed. Then, the branch pipe 9 b of the cell 9 is inserted from the cutout portion 32 of the cap 11, and the branch pipe 9 b reaches the opening 11 b of the cap 11. Thereafter, the cap 11 is pushed down along the branch pipe 9b, whereby the first half 12 and the second half 13 opened in a V-shape are brought into close contact with each other, and the elastic members 14 and 17 are connected to the branch pipe of the cell 9. 9b (see FIGS. 4 and 5). Then, when the cap 11 is turned in the direction of arrow C (see FIG. 13), the pin 35 enters into the groove 36, and the operation of setting the cell 9 in the sample holder 6 is completed (see FIG. 12).

  As described above, in the sample holder jig 40, the first half 12 of the holding unit 10 is formed on the upper surface 41 a of the jig body 41 with the open / close arm 42 opened with respect to the jig body 41. Since the second half 12 of the holding portion 10 can be placed on the upper surface 42a of the open / close arm 42, the holding portion can be removed from the jig 40 even if the hand is released. 10 does not fall.

  Furthermore, since the opening / closing arm 42 can be opened / closed in the horizontal direction with respect to the jig main body 41 by employing the hinge portion 43, the cell 9 can be easily set in the jig 40. As described above, the jig 40 has the open / close arm 42 that is rotatable with respect to the jig main body 41 in the horizontal direction via the hinge portion 43, so that the optical cell 9 can be easily attached to the holding portion 10. This can be performed, and labor and time when the cell 9 is attached to the sample holder 6 can be greatly reduced. Therefore, the cell 9 can be quickly attached to the sample holder 6, the working time can be shortened, and various types of samples can be measured with the integrating sphere 2 in a short time.

  As shown in FIG. 14, the inner peripheral surface 60 a of the cap 60 is provided with a convex portion 61 that comes into contact with the surface of the ring-shaped protruding portion 10 b formed on the outer surface 10 a of the holding portion 10. The convex portion 61 is formed by adhering and fixing an elastic body 63 such as rubber to the inner peripheral surface 60 a of the cap body 62. Then, by fitting the cap 60 into the holding part 10, the elastic body 63 is pressure-bonded to the overhanging part 10 b of the holding part 10, and the cap 60 is not easily detached from the holding part 10.

  As shown in FIG. 15, male screw portions 71 a and 72 a are provided on the outer surfaces of the first and second half portions 71 and 72 of the holding portion 70, and a female screw portion 81 is provided on the inner peripheral surface 80 a of the cap 80. Is provided. Then, with the first half portion 71 and the second half portion 72 butted against each other, the cap 80 is fitted into the holding portion 70, and the cap 80 is turned to turn the male screw portions 71 a and 72 a of the holding portion 70. Thus, the female screw portion 81 of the cap 80 is screwed.

  2 ... integrating sphere, 6 ... sample holder, 9 ... optical cell (sample container), 9a ... cell body, 9b ... branch pipe, 10, 70 ... holding part, 10a ... outer surface of holding part, 10c ... first of holding part , 10d ... second end of the holding part, 11, 60, 80 ... cap (fixing member), 11d ... inner peripheral surface of the cap, 12, 71 ... first half, 13, 72 ... first 2 half, 14 ... 1st elastic member, 16 ... 1st flange part, 17 ... 2nd elastic member, 19 ... 1st flange part, 33, 61 ... convex part, 35 ... Retaining pin ( Retaining means), 36... Groove portion, 40... Sample holder jig, 41... Jig body (first member), 41 a... Upper surface of the first member, 42 .. open / close arm (second member), 42 a ... upper surface of second member, 43 ... hinge portion, 46 ... first positioning recess, 47 ... second positioning recess, 51 First hole 52, first fall prevention pin, 53 ... second hole, 54 ... second fall prevention pin, 71a, 72a ... male screw part, 81 ... female screw part, A ... Gap, R ... Sample.

Claims (6)

In the sample holder that is detachably attached to the integrating sphere for observing the light to be measured generated by the sample in the sample container,
A holding portion having an elastic member for sandwiching the sample container;
A fixing member that pressurizes the holding part by fitting the holding part,
The sample holder, wherein the elastic member presses the sample container and the holder holds the sample container by pressurization by the fixing member.   The sample holder according to claim 1, wherein the holding portion has a flange portion attached to the integrating sphere, and the elastic member is positioned above the flange portion.   The holding portion includes a first half and a second half, and the elastic member includes a first elastic member provided in the first half and a second half. The sample holder according to claim 1, wherein the sample container is sandwiched between the first elastic member and the second elastic member. The holding portion has a first end portion on the side inserted into the integrating sphere, and a second end portion disposed outside the integrating sphere,
The position where the fixing member presses the holding part is closer to the first end of the holding part than the center position of the first elastic member and the center position of the second elastic member. The sample holder according to claim 3. On the outer surface of the holding part, an overhanging part that is fitted and pressed into the fixing member is provided,
On the inner peripheral surface of the fixing member, a convex portion that presses the protruding portion is formed,
The elastic member for sandwiching the sample container is provided on the inner surface of the holding portion, and the elastic member and the overhanging portion are arranged to face each other in a direction in which the holding portion is pressurized. The sample holder according to claim 1.   The sample holder according to claim 5, wherein a taper portion is formed on the projecting portion on the insertion side to the fixing member.

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