JPWO2009060701A1 - Micro-aperture forming apparatus and body fluid collecting system using the same - Google Patents

Abstract

In an apparatus for irradiating the surface of a living body with laser light to form microscopic apertures for collecting cell interstitial fluid, etc., when irradiating multiple locations with laser light from a single laser light source, Keeping the interval at a moderate level allows for a certain amount of sampling.

Description

  The present invention relates to a microscopic opening forming apparatus used for collecting a bodily fluid such as a cell interstitial fluid or blood by irradiating a surface of a living body with laser light to form a microscopic opening, and a bodily fluid collecting system using the same.

  The most common method for collecting body fluid from a living body is to collect blood with an injection needle. However, there are problems such as anxiety and pain of the patient, and infection by bacteria attached to the injection needle. In addition, for example, in order to see the progress after the operation, it is necessary to puncture the body with an injection needle every time when collecting continuously, as in the case of monitoring the glucose concentration (blood glucose level) every 30 minutes or every hour. Yes, the skin became stiff and the burden on the patient was excessive.

  Therefore, in order to reduce such a burden, a method of collecting cell interstitial fluid instead of blood has attracted attention in recent years. This is because the interstitial fluid that exudes from a microscopic opening that does not reach the dermis layer through which the blood vessel passes and is exuded from there are no blood cells, etc. This is because it is a substitute for a blood test, and there is no (less) pain when drilling.

  Therefore, in Patent Document 1, a laser beam is used to create a microscopic aperture in an apparatus for collecting the cell interstitial fluid and measuring it with a sensor. In this way, by using laser light to form the microscopic aperture, the aperture itself is small and does not touch the living body, so it can be treated minimally invasively, and it can prevent infection and relieve the patient's anxiety of piercing the body. From this point of view, a remarkable effect is obtained as compared with the conventional method using a needle.

However, as described above, since the opening is very small, the amount of interstitial fluid sucked is small and the suction time is long in one opening. Therefore, in Patent Document 2, as shown in FIG. 14 and FIG. 15, an optical member interposed between the living body surface 54 after converging the beam light 52 diverging from a single laser diode 51 with a lens 53. A plurality of minute apertures are created by bending the optical member 55 or 56 around the optical axis 57 and bending the optical member 55 or 56 around the optical axis 57.
US Pat. No. 6,530,915 US Pat. No. 6,951,411

  In the above-described prior art, the irradiation position, that is, the irradiation position of the light beam 52 that is bent as the living body surface 54 moves away from the optical members 55 and 56, as indicated by reference characters W1 to W2, is the optical axis 57. Go away. Therefore, even if the light beams 2 are irradiated at equal rotation angle intervals of the optical members 55 and 56, there is a problem that the interval between the minute openings varies depending on the distance to the surface of the living body. For this reason, when the interval between the minute openings is increased, the minute openings cannot be accommodated in the chamber that covers the living body surface 4 and sucks the interstitial fluid after the minute openings are formed. Less cell interstitial fluid is coming.

  An object of the present invention is to provide a micro-aperture forming apparatus capable of always maintaining a constant interval between a plurality of micro-apertures formed, and a body fluid collecting system using the micro-aperture forming apparatus.

  The microscopic aperture forming apparatus of the present invention is an apparatus for forming a microscopic aperture by irradiating a surface of a living body with laser light. The microscopic aperture forming apparatus is made of a material that transmits the laser light, and at least one of an incident surface and an exit surface is the laser light. Provided with an inclination with respect to the optical axis, a shift means for emitting the incident laser light by shifting it parallel to the optical axis, and a plurality of rotation means by rotating the shift means around the optical axis. And rotating means for creating the minute opening on the surface of the living body.

  According to the above configuration, in a device for irradiating the surface of a living body with laser light to form a microscopic aperture for collecting a cell interstitial fluid, the laser light from a single laser light source is applied to a plurality of locations. When creating a plurality of the micro openings on the surface of the living body by irradiating, the laser beam is not simply bent by the optical member interposed in the optical path and the optical member is rotated by the rotating means. Shifting means for injecting the incident laser light in parallel with the optical axis by being provided with a transmitting material and having at least one of the incident surface and the emission surface inclined with respect to the optical axis of the laser light. The shift means is rotated around the optical axis by the rotation means.

  Therefore, by irradiating the laser beam at equal rotation angle intervals, even if the distance from the center of the shift means to the surface of the living body changes, it is possible to always keep the interval between the plurality of minute openings formed constant. it can. Thereby, in the case of collecting the interstitial fluid, it is possible to collect a certain amount while keeping the interval between the minute openings moderate.

  In the minute opening forming apparatus of the present invention, at least one surface of the shift means is a curved surface.

  According to said structure, the at least one surface of the said shift means is a suitably designed curved surface, such as a cylindrical surface, Therefore Astigmatism with respect to a defocus can be suppressed or eliminated.

  Preferably, at least one surface of the shift means is a spherical surface.

  Preferably, at least one surface of the shift means is an anamorphic surface.

  More preferably, at least one surface of the shift means is a cylindrical surface.

  In that case, the direction of inclination of the shift means and the direction of curvature of the cylindrical surface are perpendicular to each other.

  According to the above configuration, when one surface of the shift unit is a cylindrical surface, the shift unit having a semi-cylindrical shape or an inverted shape thereof has an axis perpendicular to the inclined surface with respect to the optical axis. If the shift means is displaced in the axial direction of the orthogonal direction, the refraction does not change.

  Therefore, by forming at least one surface of the shift means as a cylindrical surface and arranging it as described above, the distance between the minute openings is kept constant with respect to the displacement of the shift means in the direction. be able to.

  Further, in that case, the entrance surface of the shift means is a curved surface and the exit surface is a plane.

  According to the above configuration, if the curved surface is formed near the exit surface, the influence of aberration is likely to occur.

  Therefore, by providing a curved surface for shifting the optical axis on the incident surface, the influence of such aberration can be reduced.

  Furthermore, the microscopic aperture forming device of the present invention is characterized in that a light absorber is disposed on the surface of the living body, the laser beam is absorbed by the light absorbing body, and the opening is formed in the living body by the heat. .

  According to the above configuration, by using a light absorber that absorbs laser light, such as a carbon black sheet, rather than directly irradiating a living body with laser light, a small aperture with a desired depth can be obtained with a small laser power. It can be formed with a small diameter, and the burden on the patient can be reduced. Further, since a laser source having a wavelength that is difficult to be absorbed by the skin can be used, it is possible to use a semiconductor laser for an optical disc that can be obtained at a relatively low cost with a high output.

  In the minute aperture forming apparatus of the present invention, the laser light source is a laser diode, and a condenser lens is provided between the laser light source and the shift means.

  According to the above configuration, since it is small, inexpensive, and can be driven by a battery, if a semiconductor laser is used as a laser light source for realizing a portable microscopic aperture forming device, the light from the laser diode diverges, so Provide a lens.

  Therefore, a small and inexpensive microscopic aperture forming apparatus can be realized.

  Furthermore, the bodily fluid collection system of the present invention includes the above-described microscopic opening forming device, a chamber that is openly attached to the surface of the living body after the microscopic opening is formed to form the bodily fluid collecting space, and the chamber And a body fluid collecting device including suction means for suctioning the exuded body fluid while reducing the pressure inside.

  According to said structure, the bodily fluid collection system which can perform from the formation of a micro opening to the suction | inhalation of the exuding bodily fluid is realizable.

  As described above, the micro-aperture forming apparatus of the present invention is an apparatus for forming a micro-aperture by irradiating the surface of a living body with a laser beam for collecting a cell interstitial fluid. When a plurality of the micro openings are formed on the surface of the living body by irradiating a plurality of laser beams on the surface of the living body, the optical member is simply interposed in the optical path, the laser beam is bent, and the optical member is rotated by the rotating means. Rather, it is made of a material through which the laser beam is transmitted, and at least one of the incident surface and the emission surface is inclined with respect to the optical axis of the laser beam so that the incident laser beam is parallel to the optical axis. Shifting means for shifting and emitting is provided, and the shifting means is rotated around the optical axis by the rotating means.

  Therefore, by irradiating the laser beam at equal rotation angle intervals, even if the distance from the center of the shift means to the surface of the living body changes, the interval between the plurality of minute openings formed is always kept constant. Can do. Thereby, in the case of collecting the interstitial fluid, it is possible to collect a certain amount while keeping the interval between the micro openings moderate.

  Furthermore, as described above, the body fluid collection system of the present invention uses the micro-aperture forming device, and the bottom surface is opened and is closely attached to the surface of the living body after the micro-aperture is formed, thereby forming the body fluid collection space. And a body fluid collecting device including a chamber for vacuuming and a suction means for suctioning the exuded body fluid while reducing the pressure inside the chamber.

  Therefore, it is possible to realize a body fluid collection system capable of performing from the formation of a microscopic opening to the suction of exuded body fluid.

It is sectional drawing which shows the structure of the micro opening formation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the bodily fluid collection apparatus which comprises the said micro opening formation apparatus and a bodily fluid collection system. It is a figure for demonstrating the creation example of the micro opening to the biological body surface in the case of body fluid collection. It is a figure for demonstrating in detail the optical system of the micro aperture formation apparatus which concerns on the 2nd Embodiment of this invention. It is a spot diagram for demonstrating the problem in the micro opening formation apparatus shown in FIG. It is a spot diagram of the micro opening formation apparatus shown in FIG. It is a figure for demonstrating in detail the optical system of the micro aperture formation apparatus which concerns on the 3rd Embodiment of this invention. FIG. 8 is a spot diagram of the microscopic aperture forming apparatus shown in FIG. 7. It is a figure for demonstrating in detail the optical system of the micro aperture formation apparatus which concerns on the 4th Embodiment of this invention. FIG. 10 is a spot diagram of the minute aperture forming apparatus shown in FIG. 9. FIG. It is a figure for demonstrating in detail the optical system of the micro aperture formation apparatus which concerns on the 5th Embodiment of this invention. FIG. 12 is a spot diagram of the minute aperture forming apparatus shown in FIG. 11. It is a perspective view for demonstrating the example of arrangement | positioning of a cylindrical lens. It is a figure for demonstrating the optical system of the typical micro aperture formation apparatus of a prior art. It is a figure for demonstrating the optical system of the micro aperture formation apparatus of another prior art.

Explanation of symbols

1, 1a, 1b, 1c, 1d Micro-opening device 2 Biological surface 2a Micro-opening 3 Chamber 4 Body fluid collecting device 5 Infusion tube 6 Negative pressure device 7 Sensor 8 Liquid collection container 11 Laser light 12 Laser diode 13, 13b, 13c Collection Optical lens 15, 15a, 15b, 15c, 15d Shift plate 16 Optical axis 17 Rotating mechanism 18 Drive circuit board 19 Housing 20, 21 Cover glass 23, 23c Condensing lens

[Embodiment 1]
FIG. 1 is a cross-sectional view showing a structure of a minute opening forming apparatus 1 used in a body fluid collecting system according to a first embodiment of the present invention. The micro-aperture forming apparatus 1 includes a laser diode 12 that generates laser light 11, a condensing lens 13 that condenses the laser light 11 emitted from the laser diode 12, a shift plate 15 described later, and the shift plate The rotating mechanism 17 rotates the lens 15 around the optical axis 16, the drive circuit board 18 that drives the laser diode 12, and the housing 19 that houses and holds them in a predetermined position.

  The laser diode 12 generates 660 nm laser light for DVD, for example. Therefore, even a high output is preferable because it can be obtained relatively inexpensively. Moreover, since it can be driven by a battery, the portable minute aperture forming apparatus 1 can be realized.

  However, since the semiconductor laser generally has a diverging characteristic, the condenser lens 13 is interposed to form the minute aperture. Further, although the above-mentioned wavelength is absorbed by the skin, the absorption rate thereof is relatively small. Therefore, the surface of the living body (for example, arm or waist) 2 absorbs light (not shown) rather than direct laser light irradiation. It is preferable to place a body and irradiate it. As the light absorber, a resin film mixed with carbon black or the like can be used, and an adhesive for application to the living body surface 2 is applied on one side, for example, the size is about 1 cm in diameter and the thickness is 100 μm. Degree.

  The drive circuit board 18 is mounted with a drive circuit for the laser diode 12, an overall control circuit, an operation unit, a power supply, and the like. The pulse that repeats on / off is driven by about 10 pulses, and a microscopic opening 2 a having a diameter of about 100 μm and a depth of about 100 μm is formed on the living body surface 2. Although depending on the absorption coefficient of the resin film, etc., by irradiating with a pulse, it is possible to dig in the depth direction without expanding the diameter as compared with the case of irradiating for a long time at a time. By using such a light absorber with good absorption of the laser beam 11, the microscopic aperture 2a having a desired depth can be formed with a small laser power and with a small diameter, and the burden on the patient can be reduced. It can also be reduced.

  The diameter and depth of the minute opening 2a are such that only the stratum corneum and epidermis are removed, and for example, about 5 μl / h of cell interstitial fluid can be exuded. On the other hand, when the number of pulses is increased and the depth exceeds 150 μm, it reaches the dermis and blood can be collected from the capillaries. However, in that case, there is a possibility of feeling pain because there is a nerve. Conversely, if the number of pulses is reduced and the depth is less than 50 μm, only the stratum corneum is removed, and the epidermis necessary for the exudation of cell interstitial fluid cannot be removed. Therefore, for the collection of the interstitial fluid, the depth of the minute opening 2a is preferably 50 to 150 μm, and most preferably 100 μm. If the diameter is about the same as the depth, sufficient bleeding can be expected, and if it is too large, the hole can be clearly seen with the naked eye, which is not minimally invasive for the patient.

  FIG. 2 is a diagram showing a configuration of a body fluid collecting device 4 that is used after the micro opening 2a is formed and constitutes a body fluid collecting system together with the micro opening forming device 1. This body fluid collection device 4 monitors the blood glucose concentration (blood glucose level) of a patient after surgery by collecting cell interstitial fluid at a predetermined time interval such as 30 minutes or 1 hour. . In addition, it can be used for measuring alcohol concentration.

  This body fluid collecting device 4 is generally composed of a chamber 3 that is open at the bottom and is in close contact with the living body surface 2 of the patient by tape or the like, an infusion tube 5 connected to the chamber 3, and the infusion tube 5 A negative pressure device 6 that depressurizes the inside of the chamber 3, a sensor 7 that measures the blood glucose concentration in the cell interstitial fluid aspirated by the negative pressure device 6, and between the cells that have passed through the sensor 7 And a liquid collection container 8 for storing the liquid material.

  The chamber 3 is made of a transparent resin having a shape in which an ellipsoidal shell is divided in half in the major axis direction. For example, the chamber 3 has a diameter of 2 cm and a height of 1 cm, and the inside is a cavity to form the body fluid collection space. The bottom surface is opened as described above and faces the living body surface 2.

  The negative pressure device 6 serving as a suction means is configured by including a power source, a control circuit, a drive circuit, an operation unit, and the like in a pump that performs suction, but the details are omitted. The negative pressure device 6 may appropriately generate a negative pressure required at the time of collection in response to an operation from the operation unit, or may be detected by a pressure sensor provided in the chamber 3 or the infusion tube 5. In response to the result, the required negative pressure may be maintained as appropriate.

  It should be noted that in the microscopic aperture forming apparatus 1, the laser beam 11 is transmitted between the condenser lens 13 and the living body surface 2, and at least one of the entrance surface and the exit surface (FIG. 1). In this case, the laser beam 11 incident on the center (on the optical axis 16) is shifted from the center by a distance W0 and light is provided. The shift plate 15, which is a shift unit that emits in parallel with the shaft 16, is interposed, and the shift plate 15 is rotated around the optical axis 16 by the rotation mechanism 17 that is a rotation unit. The opening 2a can be created on the living body surface 2. The rotation mechanism 17 is controlled by a drive circuit board 18 and is sequentially displaced at equal rotation angle intervals, and the laser beam 11 is irradiated at each rotation angle position as described above. Therefore, for example, three fine openings are formed every 120 °, and four fine openings are formed every 90 °.

  For example, the shift plate 15 is made of BK7 and is inclined at θ = 25 ° from the vertical plane 14 of the optical axis 16. For example, when four (square) minute openings are formed on a circumference having a diameter of about 1 mm, a parallel plate having a refractive index of 1.5 and a thickness of about 3.5 mm by the BK7 is inclined by θ = 25 °. Then, a shift of about W0 = 0.55 mm is obtained. Therefore, if it is created evenly every 90 ° on the circumference, as shown in FIG. 3, the minute opening 2a is formed at the position of the apex of a square of about 800 μm. It can be created. In Table 1, as shown in FIG. 3, in order to obtain a shift amount of W0 = 0.56 mm for creating the minute aperture 2a at the apex position of a square of 800 μm, the plate (BK7 ), The relationship between the thickness of the plate and the required inclination θ is shown.

  In this way, in the apparatus 1 for irradiating the surface 2 of the living body with the laser beam 11 to form a microscopic opening for sampling the cell interstitial fluid, the laser beam 11 from a single laser diode 12 is emitted at a plurality of locations. When the plurality of microscopic openings 2a are formed on the living body surface 2 by irradiating the surface of the living body 2, the optical member is not simply bent through the optical path, the laser beam 11 is bent, and the optical member is not rotated by the rotation mechanism 17. As shown in FIG. 1, for example, a shift plate 15 that shifts the laser beam 11 incident on the center (on the optical axis 16) from the center and emits the laser beam 11 in parallel with the optical axis 16 as indicated by reference numeral 16 '. Even if a change occurs in the distance from the shift plate 15 to the living body surface 2 by rotating the shift plate 15 around the optical axis 16 by the rotating mechanism 17, the optical plate 16 extends to the minute opening. It is possible to maintain the interval W0 always constant. As a result, as shown in FIG. 3, the interval L between the micro openings 2a formed at equal intervals on a predetermined circumference can always be kept constant, and the cell interstitial fluid can be collected. The interval between the minute openings 2a does not protrude from the chamber 3 or is not too close, so that it can always be kept moderate and a certain amount can be collected.

[Embodiment 2]
FIG. 4 is a diagram for explaining in detail the optical system of the minute aperture forming apparatus 1a according to the second embodiment of the present invention. The minute opening forming apparatus 1a is similar to the minute opening forming apparatus 1 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. After the formation of the minute opening 2a in the minute opening forming apparatus 1a, the interstitial fluid can be collected using the body fluid collecting device 4 shown in FIG. In the minute aperture forming apparatus 1a, the optical system is different from that of the minute aperture forming apparatus 1 described above. In FIG. 4, the direction of the optical axis 16 is taken as the Z axis, the direction perpendicular to it and in the plane of the paper is taken as the Y axis, and the direction perpendicular to the paper is taken as the X axis. Hereinafter, the same coordinate axes are used in the drawings of the optical system.

  In the minute aperture forming apparatus 1 described above, the shift plate 15 is a parallel plate. In this case, the laser beam 11 is transmitted through the inclined parallel plate, and so-called astigmatism that the focal position is different between the inclined direction and the direction orthogonal to the inclined direction is generated, and the condensing state is changed. End up. Specifically, the focal position in the vertical direction is a horizontally long condensing state, the horizontal direction is a vertically long condensing state, and in the middle it approaches a circle, but the spot size is large, and the condensing state is not much throughout. Not good. That is, since the condensing state varies depending on the defocus, the shape of the microscopic aperture 2a is changed even if the interval between the microscopic apertures 2a is not changed. There is a possibility that the minute opening 2a cannot be created.

  FIG. 5 shows a spot diagram (condensed state) when the 3 mm plate made of BK7 is tilted by θ = 30 ° for every 100 μm defocus. In order from the left, spot shapes at defocus positions of −20 μm, −100 μm, ± 0 μm (best position), +100 μm, and +200 μm are shown. The right scale in the figure is 100 μm. Hereinafter, the same scale is used in the spot diagram diagrams. Here, in the direction of the optical axis 16, the direction in which the laser beam 11 travels is positive for defocus, and the opposite direction is negative. Referring to FIG. 5, it is understood that the front position of the best position is vertically long and the back position is horizontally long, and the size thereof is considerably large, being slightly less than 100 μm. Furthermore, since the point image has spread considerably even at the best position, it is understood that a good condensing position cannot be obtained, and it may be difficult to make a fine aperture as described above. Is done.

  It should be noted that in the minute aperture forming apparatus 1a of the present embodiment, the shift plate 15a is not a flat plate, but at least one (the condensing lens 13 side in FIG. 4) is a curved surface that compensates for astigmatism. Thus, it is possible to suppress or eliminate astigmatism with respect to the defocus and always create a similar minute aperture.

  In general, in order to eliminate the astigmatism, an optical element having a characteristic that the focal position differs depending on the direction of a cylindrical lens or the like may be disposed in the optical system. However, for example, when such a condensing lens 13 or such an optical element is arranged immediately thereafter, it has a good aberration correction characteristic in one direction of the shift plate 15, but it works worse in the other direction. Will have. For this reason, in this embodiment, the shift plate 15a itself is a cylindrical lens so that the optical element for reducing astigmatism rotates integrally with the shift plate 15. As a result, the shift means for forming a plurality of minute openings by the laser light 11 from the single laser diode 12 and the optical element for reducing astigmatism caused thereby can be configured as one component.

Below, detailed data of the optical system of the present embodiment will be described. In FIG. 4 and the following data, the corresponding position is indicated by adding a suffix to the reference symbol P. In the following embodiments as well, the units such as the radius of curvature and the interval (thickness) are mm. In this detailed optical system, the laser diode 12 emits the laser light 11 through the cover glass 21, and the cover glass 20 is also provided on the living body surface 2. By pressing the cover glass 20 against the living body surface 2, it is possible to reduce the focus shift on which the laser light 11 is condensed even on a soft living body surface. Therefore, in the optical system of the present embodiment, in order from the light source (laser diode 12), the flat surface of the laser cover glass 21, the biconvex condensing lens 13, and the optical axis 16 are arranged with the cylindrical surface on the light source side, and the curvature. Are made of a shift plate 15a and a flat cover glass 20 in the X direction perpendicular to the paper surface.
Position Member Y radius of curvature X radius of curvature Spacing Material Tilt Conic factor P1 Laser diode Infinity Infinity 0.30 0
P2 laser cover glass Infinity Infinity 0.30 BK7 0
P3 Laser cover glass Infinity Infinity 0.42 0
P11 condenser lens 5.047 5.047 4.00 BK7 0
P12 condenser lens −1.474 −1.474 3.00 −0.720
P13 cylinder lens Infinity -206.7 3.00 BK7 28.5 0
P14 cylinder lens Infinity Infinity 0.00 0
P15 dummy surface Infinity Infinity 6.76 -28.5 0
P16 cover glass Infinity Infinity 3.30 BK7 0
P17 Cover glass Infinity Infinity 0.00 0
P4 Focus Infinity Infinity 0
FIG. 6 shows a spot diagram (condensing state) by such an optical system in the same manner as FIG. 5 described above. Comparing these figures, the vertical and horizontal lengths are suppressed, and even if the spot approaches the circle and is slightly defocused from the best position, that is, even if the height of the biological surface 2 varies somewhat, It can be understood that a good light-collecting state is obtained and the defocus characteristic is dramatically improved. In this way, astigmatism can be compensated, and a similar minute aperture can always be created.

  Further, in the shift plate 15a, when the cylindrical surface is provided on the incident surface and the exit surface is a flat surface, if the curved surface is formed near the exit surface, the influence of the aberration is likely to occur. The influence of can be reduced.

[Embodiment 3]
FIG. 7 is a diagram for explaining in detail the optical system of the minute aperture forming apparatus 1b according to the third embodiment of the present invention. The minute opening forming apparatus 1b is similar to the minute opening forming apparatus 1a described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in the microscopic aperture forming apparatus 1b of the present embodiment, another condensing lens 23 made of a plano-concave lens is interposed between the aspherical condensing lens 13b and the shift plate 15b made of a cylindrical lens. It has been done. Thereby, the lens back can be lengthened, and the rotation mechanism 17 can be easily inserted. In the following, detailed data of the optical system of the present embodiment is described as described above. Therefore, the optical system of the present embodiment is cylindrical with respect to the flat laser cover glass 21, the biconvex condensing lens 13b, the plano-concave condensing lens 23, and the optical axis 16 in order from the light source (laser diode 12). The shift plate 15b has a surface in the light source side and a curvature in the X direction perpendicular to the paper surface. Also in FIG. 7 and the following data, the corresponding positions are indicated by adding a suffix to the reference symbol P.
Position Member Y radius of curvature X radius of curvature Spacing Material Tilt Conic factor P1 Laser diode Infinity Infinity 0.30 0
P2 laser cover glass Infinity Infinity 0.30 BK7 0
P3 Laser cover glass Infinity Infinity 1.93 0
P21 condenser lens 22.939 22.939 2.00 BK7 0
P22 condenser lens −1.475 −1.475 4.82 −0.809
P23 condenser lens (concave) Infinity Infinity 1.50 SF11 0
P24 Condensing lens (concave) 14.200 14.200 3.00 0
P25 cylinder lens Infinity -39.1 3.00 BK7 25 0
P26 Cylinder lens Infinity Infinity 0.00 0
P27 dummy surface Infinity Infinity 2.38 -25 0
P4 Focus Infinity Infinity 0
FIG. 8 shows a spot diagram (condensing state) by such an optical system in the same manner as in FIG. Comparing these figures, the vertical and horizontal lengths are suppressed, and even if the spot approaches the circle and is slightly defocused from the best position, that is, even if the height of the biological surface 2 varies somewhat, It can be understood that a good light-collecting state is obtained and the defocus characteristic is dramatically improved. In this way, astigmatism can be compensated, and a similar minute aperture can always be created.

[Embodiment 4]
FIG. 9 is a diagram for explaining in detail the optical system of the minute aperture forming apparatus 1c according to the fourth embodiment of the present invention. The minute opening forming apparatus 1c is also similar to the minute opening forming apparatuses 1a and 1b described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in the minute aperture forming apparatus 1c of the present embodiment, a spherical lens is used for the shift plate 15c, and a double-sided concave lens is used for the condenser lens 23c. In the following, detailed data of the optical system of the present embodiment is described as described above. Therefore, in the optical system of the present embodiment, in order from the light source (laser diode 12), the flat laser cover glass 21, the biconvex condensing lens 13c, the biconcave condensing lens 23c, and the spherical surface convex to the light source side. It consists of a shift plate 15c made of a lens. Also in FIG. 9 and the following data, the corresponding positions are indicated by adding a reference numeral to the reference symbol P.
Position Member Y radius of curvature X radius of curvature Spacing Material Tilt Conic factor P1 Laser diode Infinity Infinity 0.30 0
P2 laser cover glass Infinity Infinity 0.30 BK7 0
P3 Laser cover glass Infinity Infinity 0.55 0
P31 condenser lens 6.260 6.260 2.00 BK7 0
P32 condenser lens −0.916 −0.916 2.00 −0.806
P33 Condenser lens (concave) -9.700 -9.700 1.50 SF11 0
P34 Condensing lens (concave) 9.700 9.700 1.27 0
P35 spherical lens 25.8 25.8 5.30 BK7 100
P36 spherical lens Infinity Infinity 0.00 0
P37 dummy surface Infinity Infinity 5.00 -10 0
P4 Focus Infinity Infinity 0
FIG. 10 shows a spot diagram (condensing state) by such an optical system in the same manner as in FIGS. 6 and 8 described above. By using a spherical lens, it is easier to manufacture and less expensive than a cylindrical lens, and it is understood that the spot is closer to a circle because there is no residual coma aberration.

[Embodiment 5]
FIG. 11 is a diagram for explaining in detail the optical system of the minute aperture forming apparatus 1d according to the fifth embodiment of the present invention. The minute opening forming apparatus 1d is also similar to the minute opening forming apparatus 1c described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in the minute aperture forming apparatus 1d of the present embodiment, a shift plate 15d made of an anamorphic lens is used instead of the shift plate 15c in the aforementioned minute aperture forming apparatus 1c. In the following, detailed data of the optical system of the present embodiment is described as described above. Therefore, the optical system according to the present embodiment has the flat laser cover glass 21, the biconvex condensing lens 13c, the biconcave condensing lens 23c, and the analog convex to the light source side in order from the light source (laser diode 12). The shift plate 15d is made of a morphic lens. In FIG. 11 and the following data as well, the corresponding positions are indicated by adding a suffix to the reference symbol P.
Position Member Y radius of curvature X radius of curvature Spacing Material Tilt Conic factor P1 Laser diode Infinity Infinity 0.30 0
P2 laser cover glass Infinity Infinity 0.30 BK7 0
P3 Laser cover glass Infinity Infinity 0.55 0
P41 condenser lens 6.260 6.260 2.00 BK7 0
P42 condenser lens −0.916 −0.916 2.00 −0.806
P43 Condensing lens (concave) -9.700 -9.700 1.50 SF11 0
P44 Condensing lens (concave) 9.700 9.700 1.27 0
P45 Anamorphic lens 6.344 5.816 5.30 BK7 25-12.04 (Y)
−9.66 (X)
P46 Anamorphic Lens Infinity Infinity 0.00 0
P47 dummy surface Infinity Infinity 5.00 -25 0
P4 Focus Infinity Infinity 0
FIG. 12 shows a spot diagram (condensing state) by such an optical system in the same manner as in FIGS. 6, 8 and 10 described above. By using an anamorphic lens, unlike the spherical lens, the radius of curvature in the x direction and the y direction can be freely selected. Therefore, the position and the radius of curvature of the shift plate 15d can be arbitrarily set, and the design The degree of freedom (arrangement of the lens interval and focal length) can be increased, and a slight coma aberration remaining on the cylindrical surface can be corrected, so that the light collecting characteristic can be further improved.

  In the above-described embodiment, a cylindrical lens, a spherical lens, and an anamorphic lens are used as the shifting means in addition to the parallel plate, but the present invention is not limited to them, and any curved surface that is appropriately designed may be used. . Other examples include an aspherical surface and a free-form surface. Appropriate design is to arrange a surface that generates asymmetric power in accordance with the back position and the amount of astigmatism, and can be obtained with an optical design tool or the like. In particular, a surface having no power or a small surface in the tilt direction is preferable. The reason is that if there is power in the tilt direction, it is good if the surface vertex in the tilt direction coincides with the chief ray, but if it shifts due to parallel decentering, the wedge effect will occur accordingly, This is because the occurrence of aberration and the inclination of light rays occur. As a result, the light collection characteristics deteriorate due to aberrations, or the distance between the minute apertures 2a changes somewhat due to defocusing. Therefore, in order to avoid the influence, the power in the tilt direction is higher than that in the orthogonal direction. Small is preferable.

  Thus, for example, in the case of a cylindrical lens, as shown in FIG. 13A, when an axis H parallel to the inclined surface R is provided to be inclined with respect to the optical axis 16, the cylindrical lens When the deviation occurs in the parallel axis H, the refraction changes due to the wedge effect, whereas the axis perpendicular to the inclined surface R is shown in FIG. 13B. When V is provided to be inclined with respect to the optical axis 16, even if the cylindrical lens is deviated in the direction of the axis V perpendicular to the cylindrical lens, it is preferable that the refraction does not change.

Claims (10)

In an apparatus for irradiating a living body surface with laser light to form a microscopic aperture,
The laser beam is made of a material that transmits, and at least one of the incident surface and the emission surface is provided to be inclined with respect to the optical axis of the laser beam, thereby shifting the incident laser beam in parallel with the optical axis. Shifting means for injecting
Rotating means for creating a plurality of the micro openings on the surface of the living body by rotating the shift means around the optical axis.   2. The minute opening forming apparatus according to claim 1, wherein at least one surface of the shift means is a curved surface.   3. The minute aperture forming apparatus according to claim 2, wherein at least one surface of the shift means is a spherical surface.   3. The minute aperture forming apparatus according to claim 2, wherein at least one surface of the shift means is an anamorphic surface.   3. The minute aperture forming apparatus according to claim 2, wherein at least one surface of the shift means is a cylindrical surface.   6. The minute aperture forming apparatus according to claim 5, wherein the direction of inclination of the shift means and the direction of curvature of the cylindrical surface are orthogonal to each other.   The minute opening forming apparatus according to any one of claims 2 to 6, wherein an incident surface of the shift means is a curved surface and an exit surface is a flat surface.   The light absorber is disposed on the surface of the living body, the laser beam is absorbed by the light absorber, and an opening is formed in the living body by the heat. A micro-aperture forming apparatus according to claim 1.   9. The minute aperture forming apparatus according to claim 1, wherein the laser light source is a laser diode, and a condensing lens is provided between the laser light source and the shift unit. The micro-aperture forming apparatus according to any one of claims 1 to 9,
Body fluid collection comprising a chamber that is open on the bottom surface and is closely attached to the surface of the living body after the formation of the micro-openings to form the body fluid collection space, and a suction means that decompresses the chamber and sucks the exuded body fluid A body fluid collection system comprising: a device;