JP2007071638A - Intraocular lens shape measuring method, intraocular lens inspection device, and inspection tray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intraocular lens measuring method and an inspection device for performing intraocular lens shape measurement in a space-saving manner with high measurement accuracy while drastically shortening time for measuring and inspecting an intraocular lens. <P>SOLUTION: This inspection device 10 images an intraocular lens 500 in two different directions by CCD cameras 50A and 50B, respectively, and consecutively image-processes images obtained by imaging the intraocular lens 500 in Z- and Y-directions. By image-processing upper-side images obtained by imaging in the Z-direction, shape measurement is performed on the optical part diameter A, the total length B, the effective optical part diameter C, and the optical part center D of the intraocular lens 500. By image-processing lateral images obtained by imaging in the Y-direction, shape measurement is performed on support part angles E1 and E2, a Sagitta H, a vault height G, and an optical part center thickness F of the intraocular lens 500. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intraocular lens shape measuring method, an intraocular lens inspection apparatus, and an inspection tray.

  Conventionally, an intraocular lens is used to correct a visual acuity by inserting and transplanting the lens of a cataract patient into the eye. As shown in FIGS. 2A and 2B, this intraocular lens 500 protrudes from an optical part 510 having a substantially circular shape in plan view as a lens body, and a part of the optical part 510 opposite to each other by 180 °. And a pair of support members (hereinafter simply referred to as a support portion 520 for convenience of explanation).

  In order for an intraocular lens to satisfy a standard defined by an intraocular lens approval standard of the Ministry of Health and Welfare, it is necessary to perform various standard inspections on the dimensions and optical characteristics of the intraocular lens. Items of the standard inspection in terms of dimensions include, for example, items of optical part diameter A, total length B, effective optical part diameter C, support part angles E1 and E2, sagittal H, vault height G, and optical part center thickness F. It is done.

  As shown in FIG. 2A, the optical part diameter A is the diameter of the optical part 510. The total length B (= B1 + B2) of the intraocular lens 500 is a long diameter including the support portion 520. Here, B1 is the longest distance from the optical part center D to one support part 520, and B2 is the longest distance from the optical part center D to the other support part 520. The effective optical part diameter C is a diameter that can be actually used in the optical part 510. In the example shown in FIG. 2A, the effective optical part diameter C is up to the part where the mounting end of the support part 520 enters the optical part 510. Is a diameter from the optical part center D to the mounting end of the support part 520 because there is a part that cannot be used effectively.

  The support unit angles E and E2 are inclinations of the support unit 520 with respect to a plane perpendicular to the optical axis of the optical unit 510. As shown in FIG. 2B, the sagittal H is the height to the plane that is perpendicular to the optical axis of the optical unit 510 and that includes the frontmost part and the plane that includes the rearmost part. Further, as shown in FIG. 2B, the vault height G is a height from the front end of the support portion 520 to the front surface of the optical portion 510, which is perpendicular to the optical axis. These vault height G and sagittal H are defined according to the intraocular lens approval standard. Further, as shown in FIG. 2B, the optical part center thickness F is the thickness of the center of the optical part 510.

  Patent Document 1 is known as an inspection apparatus for performing the standard inspection as described above. In Patent Document 1, when performing intraocular lens inspection using a low-power microscope for capturing an entire image of an intraocular lens and a high-power microscope for partially capturing an intraocular lens, both microscopes are switched to perform autofocus. The mechanism focuses the high-power microscope.

By the way, as an inspection tray used when inspecting an intraocular lens, Patent Document 2 discloses a conventional technique of an inspection tray. In the inspection tray of this Patent Document 2, the above items are inspected in a state where the lens is supported by the optical surface of the lens.
JP 11-337320 A JP-A-11-332903

  However, in the technique of Patent Document 1, there is a problem that it takes a long time to perform an operation for measurement by switching between a low-magnification microscope and a high-magnification microscope or using an autofocus mechanism for focusing. . Further, in the inspection of the intraocular lens in the height direction (for example, the optical part center thickness F), the focus surface of the optical part is detected by the autofocus mechanism, and the focus information on the focal point is used. In order to output the measurement result, it is necessary to perform focusing several times. For this reason, the inspection tact is not satisfactory as an automatic inspection apparatus, and focusing of inspection in the height direction is particularly difficult, and there is a problem that sufficient measurement accuracy cannot be obtained.

  In general, since a lens is required to have high optical properties, the lens is required to be free from scratches, dust and dirt. In particular, since intraocular lenses are embedded in the human body, there is a high demand for scratches, dust and dirt. In the inspection tray of Patent Document 2, since the intraocular lens is supported by the optical surface of the optical part of the intraocular lens and is not completely fixed, the optical surface may be damaged by vibration or the like. There was a high problem.

  An object of the present invention is to solve the above-described conventional problems, and can measure the shape of an intraocular lens with a small amount of space and high measurement accuracy. An object of the present invention is to provide a method for measuring an intraocular lens that can be greatly shortened.

  Another object of the present invention is to provide an intraocular lens inspection apparatus using the intraocular lens measurement method. Furthermore, another object of the present invention can be used in the measurement method of the intraocular lens, and when the shape inspection of the intraocular lens is performed, the surface of the optical part other than the edge is scratched or soiled. The purpose is to provide an inspection tray without fear.

  In order to achieve the above object, according to the first aspect of the present invention, an intraocular lens is imaged by imaging means from two different directions, and the intraocular lens is imaged from different first and second directions. The obtained image is subjected to image processing simultaneously or continuously, and the image processing includes image processing of an image obtained by imaging from the first direction. By this image processing, the optical part diameter of the intraocular lens is obtained. , Measuring the shape of at least one of the total length, the effective optical part diameter, and the center of the optical part, and image processing of an image obtained by imaging from the second direction. A gist of a method for measuring the shape of an intraocular lens, comprising measuring at least one of a support portion angle, a sagittal, a vault height, and an optical portion center thickness of the inner lens. .

  According to a second aspect of the present invention, in the first aspect, the imaging unit includes a first imaging unit that is positioned on the optical axis of the intraocular lens and an axis that is orthogonal to the optical axis of the intraocular lens. And a second imaging means for imaging the side surface of the intraocular lens.

According to a third aspect of the present invention, in the second aspect, the second imaging means is arranged at a position where all the support portions of the intraocular lens can be imaged.
According to a fourth aspect of the present invention, in any one of the first to third aspects, an illuminating unit is disposed on the opposite side of the imaging unit across the intraocular lens, and the imaging unit When the intraocular lens is imaged, the illumination means irradiates.

  According to a fifth aspect of the present invention, in the fourth aspect, the illuminating means is a monochromatic light source having a short wavelength in the visible light region as a main wavelength, or a complementary color of at least a part of a color of an intraocular lens to be measured. A monochromatic light source having a related color or a complementary color and a similar color as a main wavelength is provided.

Here, the wavelength in the representative color of the luminescent color by the illumination means will be described.
(1) It is known that general-purpose image sensors (CCD, CMOS, etc.) concentrate on visible light (about 380 to 800 nm) and have low sensitivity in other regions.

(2) The ultraviolet region (about 380 nm or less) is harmful to the human body.
(3) The wavelength range in which a general monochromatic LED (light emitting diode) emits light is as follows.

  Blue has a dominant wavelength between about 430 and 500 nm, and the wavelength range has only the vicinity of the dominant wavelength. Green has a dominant wavelength between about 500 and 560 nm, and the wavelength range has only the vicinity of the dominant wavelength. Also, red has a dominant wavelength between about 600 and 750 nm, and the wavelength range has only the vicinity of the dominant wavelength. In this specification, a wavelength region that emits a blue wavelength or less within a visible light region (about 380 to 800 nm) is defined as a short wavelength.

  Further, the complementary color relationship described in claim 5 refers to a color at a position opposite to 180 ° in the hue circle of hue science (see FIG. 15). FIG. 15 shows a general hue circle. The complementary color and the similar color are a color adjacent to the complementary color and a color further adjacent to the adjacent color in the hue circle. For example, in the hue circle shown in FIG. 15, the complementary color for “red (red)” is “green (green)”. In addition, complementary colors and similar colors for “red (red)” are used in a broader sense than general similar colors, and “blue-green” (greenish green) adjacent to “green-blue” is used. ) ”,“ Blue (blue) ”,“ green (green) ”and“ kimidori (yellowish green) ”.

  According to a sixth aspect of the present invention, an inspection tray for arranging an intraocular lens, a pair of imaging means for imaging the intraocular lens arranged on the inspection tray from two different directions, and the pair of imaging means capture images. Image processing is performed, and based on the image, at least one shape measurement of the optical part diameter, total length, effective optical part diameter, and optical part center of the intraocular lens, and the intraocular lens Measuring means for measuring at least one of the support part angle, the sagittal, the vault height, and the center thickness of the optical part, and an inspection means for determining the suitability of the measurement result of the measuring means. And an intraocular lens inspection apparatus.

  The invention according to claim 7 is the invention according to claim 6, wherein the pair of imaging means is orthogonal to the optical axis of the intraocular lens and the first imaging means for imaging by being located on the optical axis of the intraocular lens. It is located on an axis | shaft and contains the 2nd imaging means which images the side surface of the said intraocular lens, It is characterized by the above-mentioned.

  The invention according to claim 8 is the invention according to claim 6 or 7, wherein the inspection tray is provided with an intraocular lens arrangement space allowing the arrangement of an intraocular lens, and each of the above-described intraocular lens arrangement spaces A pair of illumination means is disposed on the opposite side of the imaging means, and when the intraocular lens is imaged by each imaging means, the illumination means irradiates.

  According to a ninth aspect of the present invention, in the eighth aspect, the illuminating means has a complementary color of at least a part of the color of the intraocular lens that is a measurement target with a short wavelength in the visible light region as a main wavelength. Alternatively, a monochromatic light source having a complementary color and a similar color as a main wavelength is provided.

  A tenth aspect of the present invention is the light emitting device according to the eighth or ninth aspect, wherein a light blocking member is disposed between the imaging unit and the illuminating unit that are located on opposite sides of the intraocular lens arrangement space. The arrangement position of the light blocking member is a position that does not hinder the imaging of the whole image of the intraocular lens by the imaging means and is a position that can be imaged by the imaging means.

  The invention according to claim 11 is an inspection tray provided with a placement portion for placing the intraocular lens in order to perform an examination relating to the shape of the intraocular lens. A tapered hole having a tapered surface on which the optical part of the inner lens can be placed is formed, communicated with the tapered hole, and a through-hole penetrating the placement part is formed, on the surface of the placement part, The gist of the inspection tray is characterized in that a groove is formed across the axis of the tapered hole.

  A twelfth aspect of the present invention is that, in the eleventh aspect, the mounting portion includes a holding portion for holding the intraocular lens, and the holding portion is provided for each support portion protruding from the optical portion of the intraocular lens. 2 or more is provided.

  In a thirteenth aspect of the present invention, in the twelfth aspect, of the holding portions provided for each support portion of the intraocular lens, the holding portion closest to the axis of the through hole is centered on the axis of the through hole. And is located on or in contact with the tapered surface.

  According to the first aspect of the invention, the shape measurement (dimension measurement) of the intraocular lens can be performed in a small space and with high accuracy, the intraocular lens is imaged from two directions, and the obtained image is processed simultaneously, or Since the continuous processing is performed, the measurement and inspection time of the intraocular lens can be greatly shortened.

According to the invention of claim 2, the effect of claim 1 can be easily realized.
According to invention of Claim 3, all the support parts provided in the intraocular lens can be imaged by the 2nd imaging means.

  According to invention of Claim 4, the light emitted from the illumination means permeate | transmits or is interrupted | blocked an intraocular lens, and the imaging means can image the shadow produced at that time. As a result, a special shape such as an intraocular lens having a support portion can be imaged as a shadow.

  According to the invention of claim 5, short wavelength light is easily affected by refraction and easily scattered when passing through the optical part, so that the light passing through the optical part and reaching the imaging means is reduced. The contrast of the shadow of a transparent body such as an optical part (lens) can be improved, and the accuracy of shape measurement (dimension measurement) can be improved.

  Also, if the optical part (lens) is the same color as the light (illumination light), it will easily pass through the light. If the color of the optical part (lens) is complementary to the light (illumination light), it will absorb the light. There is an easy nature. For this reason, by selecting illumination light that is a color complementary to the color of the optical unit (lens) or a color similar to the color of the complementary color relationship, the contrast of the shadow can be improved, and the accuracy of the dimension measurement can be further improved.

  According to the invention of claim 6, as an intraocular lens inspection apparatus, the dimension measurement of the intraocular lens can be performed with a small amount of space, and the intraocular lens is imaged from two directions, and the obtained image is obtained. Since the simultaneous processing or the continuous processing is performed, the measurement and inspection time of the intraocular lens can be greatly shortened.

According to the invention of claim 7, the effect of the intraocular lens inspection apparatus of claim 6 can be easily realized.
According to the eighth aspect of the present invention, the light emitted from the illuminating means passes through or is blocked by the intraocular lens, and the imaging means can image the shadow generated at that time. As a result, a special shape such as an intraocular lens having a support portion can be imaged as a shadow.

  According to the ninth aspect of the present invention, light having a short wavelength is easily affected by refraction and easily scattered when passing through the optical unit, so that light passing through the optical unit is reduced, and the optical unit (lens) The contrast of the shadow of such a transparent body can be improved, and the accuracy of dimension measurement can be further improved. In addition, when the optical part (lens) is the same color as the light (illumination light), it is easy to transmit light, and when the color of the optical part (lens) is complementary to the light (illumination light), it is easy to absorb the light. There is a nature. For this reason, by selecting illumination light that is complementary to the color of the optical unit (lens) or that is similar to the complementary color, it is possible to improve the contrast of the shadow and further improve the accuracy of dimension measurement. .

  According to the invention of claim 10, the light blocking member blocks light from the illumination unit from the outside of the optical part (lens) of the intraocular lens, and refracts or scatters at or near the edge reaching the imaging unit. Therefore, the image obtained from the imaging means can improve the contrast of the edge of the optical part (lens). For this reason, when measuring about an optical part, the measurement precision improves. Furthermore, by using a positioning method such as pattern matching using the light blocking member as a reference image, it is possible to position a measurement location that is not affected by the shape of the jig or the intraocular lens.

  According to the invention of claim 11, by forming a tapered surface on the surface of the mounting portion, when the optical portion (lens) of the intraocular lens is mounted on the tapered surface, the optical portion is at its own edge. It becomes possible to support. As a result, when the shape inspection of the intraocular lens is performed, there is no possibility of scratches on the surface of the optical unit other than the edge or the adhesion of dirt.

  Further, according to the invention of claim 11, since the inspection tray supports the edge of the optical part of the intraocular lens, the shape retainability is improved even if the intraocular lens is rich in flexibility. In addition, the intraocular lens can be stably held. Also, since it has a through-hole, for example, the optical unit is arranged so as to be coaxial with the through-hole, and the inspection power is measured through the optical unit and the through-hole, thereby measuring the resolving power and lens power of the optical unit. You can also.

  As described above, in this inspection tray, it is possible to perform measurement with a plurality of inspection apparatuses by placing the intraocular lens on one inspection tray. That is, in this inspection tray, it is possible to perform inspection by measurement performed by observing from the axial center direction of the through hole and inspection by measurement performed by observing from the direction in which the groove extends. As a result, as the number of corresponding inspection devices increases, the work time for placing the intraocular lens can be reduced, and the number of times the operator touches the intraocular lens can be reduced. Can be greatly reduced. Further, in this inspection tray, since the optical part of the intraocular lens can be observed from the direction in which the groove extends, the inclination of the intraocular lens with respect to the inspection tray can be easily known.

According to the invention of claim 12, by providing two or more holding portions for each support portion, it is possible to hold the two or more holding portions for each support portion to suppress rotation of the intraocular lens. it can.
According to the invention of claim 13, the holding portion is located on a circle centered on the axis of the through hole and is on the tapered surface or in contact with the tapered surface, so that the holding portion is a tapered surface. The outer side of the optical part placed on the outer side of the optical part. For this reason, the holding part does not interfere with the operation during the operation of placing the optical part of the intraocular lens on the tapered surface, and the operability of the operation can be improved.

Hereinafter, an embodiment in which the intraocular lens inspection apparatus of the present invention is embodied will be described with reference to FIGS.
As shown in FIG. 1, the intraocular lens inspection apparatus (hereinafter simply referred to as the inspection apparatus 10) includes an inspection tray 20, a pair of illumination devices 30A and 30B, a pair of XYZ stages 40A and 40B, and each XY. A pair of CCD cameras 50A and 50B provided on the Z stages 40A and 40B, a controller 60, a monitor 70, an external device 80, and the like are provided. The inspection tray 20 is placed on a table 100 such as a table via a frame body 110 having a covered square box shape.

(Frame 110)
As shown in FIG. 1, the upper wall 111 of the frame 110 is formed with a through-hole 112 having a quadrangular cross section penetrating vertically as shown in FIG. 13B. In the upper wall 111, a quadrangular annular protrusion 114 is formed on the periphery of the through hole 112.

(Inspection tray 20)
The inspection tray 20 is made of transparent polypropylene, and includes a covered square box-shaped base 200 and a sample support portion 210 having a low cylindrical shape protruding upward from the base 200 as shown in FIG. Yes. The base 200 has a square annular fitting wall 205 formed on the periphery of the lower surface thereof, and is fitted to the protrusion 114 of the frame body 110 by the fitting wall 205 in a detachable manner.

  The center of the surface of the sample support part 210 is penetrated by a tapered hole 220 and a through hole 230 coaxial with the tapered hole 220. The tapered hole 220 includes a tapered surface 222 that faces the inside of the sample support unit 210. That is, the tapered surface 222 has a circular cross section, and is formed such that the diameter of the circular cross section becomes shorter toward the lower part. As shown in FIG. 14A, the taper surface 222 can place the optical unit 510 of the intraocular lens 500. The tapered surface 222 is formed so as to form −10 ° to −20 ° from the surface of the sample support part 210. Note that the angle of the taper surface 222 is represented by “+” in the case of measuring upward from the surface of the sample support portion 210.

  The reason for this range of angles is that when the angle of the tapered surface 222 from the surface of the sample support part 210 is −10 ° or more, when the intraocular lens 500 is supported by the tapered surface 222, the surface facing the inspection tray side is This is because the convex shape cannot be supported by the edge of the optical unit 510 with the tapered surface 222. Further, when the angle of the tapered surface 222 from the surface of the sample support portion 210 is less than −20 °, the optical portion 510 is easily tilted, and the support portion 520 that protrudes from the optical portion 510 depends on the degree of the tilt. This is not preferable because it comes into contact with the support 210 and leads to contamination of the intraocular lens 500. Further, the support portion 520 is deformed and the angle or the like cannot be measured correctly. Here, the sample support unit 210 corresponds to a placement unit.

  The lower part of the taper hole 220 communicates with the through hole 230. The through-hole 230 is formed in a circular shape in cross section, and has the same diameter over the entire length thereof. The radius of the through hole 230 is less than 2.75 mm. The reason why the radius of the through-hole 230 is less than 2.75 mm is that the diameter of the optical part 510 of the intraocular lens 500 is smaller than φ5.5 mm because the market needs are generally low, and the radius of the through-hole 230 is 2 This is because if it is less than .75 mm, it can be used for measuring the shape of many intraocular lenses that have market needs.

  Further, in the sample support portion 210, a groove 240 is formed so as to cross the axis Ot of the tapered hole 220. The width of the groove 240 is set to be equal to or smaller than the diameter of the through hole 230 as shown in FIG. Specifically, the width of the groove 240 is 2.5 to 5.5 mm, and the depth of the groove is preferably 0.5 mm or more. In this way, the surface of the optical unit 510 facing the inspection tray 20 side can also be seen from the direction in which the groove 240 extends, and by aligning the surface of the optical unit 510 on the side opposite to the inspection tray and the surface on the inspection tray side, The inclination of the optical unit 510 (lens) can be recognized, and correction can be performed during measurement.

  If the width of the groove 240 is less than 2.5 mm, the surface of the optical unit 510 facing the inspection tray 20 side is also difficult to see from the direction in which the groove 240 extends, or imaging by a CCD camera 50B described later is difficult. There is a risk that accuracy may deteriorate. Further, the more preferable depth of the groove 240 is 0.9 mm or more.

  On the surface of the sample support part 210, a pair of opening parts 242 having a lower part opened are formed as shown in FIG. 14 (a) at a part sandwiching the through hole 230 where the groove 240 is formed. The opening 242 communicates with the through hole 230.

  Further, as shown in FIGS. 13 (a) and 14 (a), two sets of pins 250, 251, 260, and 261, which are a pair, are arranged on the upper peripheral edge of the tapered hole 220 with the axis Ot interposed therebetween. Protrudes upward. The pins 250, 251, 260, and 261 are integrally provided on the surface of the sample support portion 210 and are transparent.

  As shown in FIG. 13A, the pins 250 and 260 are arranged so as to be positioned on a straight line L1 passing through the axis Ot. Further, the pins 251 and 261 are arranged so as to be positioned on a straight line L2 passing through the axis Ot. As shown in FIG. 13 (a), the angle θ1 between the straight lines L1 and L2 and the angle θ1 between the pins 250 and 251 is the angle between the straight lines L1 and L2 and between the pins 250 and 261. It is smaller than the angle θ2. As shown in FIG. 14A, the angle θ1 is preferably such that each support portion 520 of the intraocular lens 500 can pass through and can be locked by the pins 250 and 251 and the pins 260 and 261.

  Further, the pins 251 and 261 are disposed closer to the axis Ot than the pins 250 and 260, and the axis Ot of the tapered hole 220 (that is, the axis of the through hole 230) is the center. It is arranged to be located on the circle. With this configuration, the edge of the optical unit 510 of the intraocular lens 500 can be supported by the tapered surface 222.

In addition, the distance of the axial center Ot between the pins 251 and 261 disposed closer to the axial center Ot than the pins 250 and 260 is preferably in the range of 2.8 to 3.4 mm.
The reason for this is as follows.

  First, it is assumed that an intraocular lens with a diameter of 5.5 mm having the smallest optical part diameter is placed on the tapered surface 222 for market needs, and the pins 251 and 261 are closest to the through hole 230. In this case, the pins 251 and 261 closest to the axial center of the through hole 230 (that is, the axial center Ot of the tapered hole 220) are in contact with the outer periphery of the tapered surface 222, that is, 2.75 mm from the axial center of the through hole 230. Suppose that it is provided at a position. However, in this case, when the intraocular lens is placed on the tapered surface, the pin is too close to the optical unit, and the operability of placing becomes worse.

  For this reason, if the pins 251 and 261 are installed at a position of 2.80 mm obtained by adding 0.05 mm to 2.75 mm in consideration of practical use (position on a circle centering on the axis of the through-hole 230), The operability at the time can be improved. That is, in this case, when performing the inspection, the pins 251 and 261 are positioned outside the outer diameter of the optical part placed on the tapered surface 222 with a margin, so that the optical part 510 is placed on the tapered surface. The pins 251 and 261 do not obstruct the operation, and the operability of the operation can be improved.

  Further, when the position of the pins 251 and 261 closest to the axis of the through hole 230 is more than 3.4 mm away from the axis of the through hole 230, the intraocular lens 500 is caused for some reason during the inspection work. This is because it is difficult to suppress rotation of the intraocular lens 500 when force is applied to the lens. The pins 250, 251, 260, and 261 correspond to holding parts.

  As shown in FIG. 13B, rods 270 and 271 as light blocking members are supported via brackets (not shown) at positions corresponding to the openings 242 in the frame 110, respectively. Yes. When viewed in plan as shown in FIGS. 13A and 14A, the image can be captured by a CCD camera 50 </ b> A described later through the opening 242. That is, the arrangement positions of the rods 270 and 271 are positions that do not hinder the capturing of the whole image of the intraocular lens by the CCD camera 50A and are positions that can be captured by the CCD camera 50A.

  Here, the sample support unit 210 has an intraocular lens arrangement space that allows the arrangement of the intraocular lens. That is, the space area above the tapered surface 222 is a space that allows the placement of the optical part of the intraocular lens, and is above the sample support part 210 including between the pins 250 and 251 and between the pins 260 and 261. The space is a space that allows the placement of the support portion. These two spaces constitute an intraocular lens arrangement space. When the support portion angle is 0 ° or less, the sample support portion 210 may be provided with a hollow shape or a hole so that the support portion does not adhere to the sample support portion 210.

(Lighting devices 30A and 30B)
Next, a pair of illumination devices 30A and 30B as illumination means will be described.
In the frame 110, an illumination device 30 </ b> A serving as a light source is disposed on the table 100, and the entire back surface of the inspection tray 20 can be illuminated from the back surface side (the lower surface side in FIG. 1). The illumination device 30A is configured by a backlight type blue LED (light emitting diode) illumination device.

  Further, as shown in FIG. 1, an illumination device 30B, which is also a light source, is disposed on the side of the frame 110, and is located on one side with respect to the entire one side of the inspection tray 20 (in FIG. 1). , Y direction side). The illumination device 30B is configured by a backlight type red LED (light emitting diode) illumination device.

  Here, the structure of the backlight type LED illumination device will be briefly described with reference to FIG. In addition, since both illuminating devices 30A and 30B differ only in the luminescent color, about the structure, the same code | symbol is attached | subjected and demonstrated. In the illumination devices 30 </ b> A and 30 </ b> B, the light guide plate 310 is assembled to the LED light source unit 300 at the side end surface. The light guide plate 310 has a surface on which light is irradiated, and a diffusion sheet 320 and a reflection sheet 330 are laminated on the back side thereof. In FIG. 16, for convenience of explanation, the reflection sheet 330 is disposed away from the diffusion sheet 320 for convenience. The light emitted from the LED light source unit 300 repeats total reflection and travels through the light guide plate 310. The diffusion sheet 320 on the back surface side of the light guide plate 310 has a function of collecting light that has entered the diffusion sheet 320 on the irradiation surface side. Further, the reflection sheet 330 has a function of reflecting the light that has passed through the diffusion sheet again to the surface side of the light guide plate 310.

  In this embodiment, the dominant wavelength of the light emitted from the lighting device 30A is about 470 nm, and the dominant wavelength of the light emitted from the lighting device 30B is about 660 nm. In the present embodiment, the reason why red is used as the luminescent color of the illumination device 30B is that when the intraocular lens is imaged, it is important to detect the support portion 520 in the measurement from the side image. This is because. In this embodiment, since the support portion 520 has a blue color, it is clear that the contrast is improved when “Kidai (yellow orange)” having a complementary color relationship or “Red” having a similar color is used. For this reason, in this embodiment, red LED illumination which is easy to obtain at low cost is adopted.

(XYZ stages 40A and 40B and CCD cameras 50A and 50B)
The XYZ stage 40A that supports the CCD camera 50A is supported by a support device (not shown) so as to be positioned above the inspection tray 20. The XYZ stage 40A includes an X-axis motor 45a, a Y-axis motor 45b, and a Z-axis motor (not shown). Then, by driving and controlling the motors, the CCD camera 50A is moved in the direction orthogonal to the drawing (X direction) in FIG. 1, the horizontal direction (Y direction) in the drawing, and the vertical direction (Z direction) in FIG. Can be moved three-dimensionally. The CCD camera 50A moves in the X, Y, and Z directions orthogonal to each other on the XYZ stage 40A, so that the sample (ie, intraocular lens) placed on the inspection tray 20 is viewed in plan view. Can be taken. The direction in which the CCD camera 50A images (that is, the Z direction) corresponds to the first direction.

  The XYZ stage 40B that supports the CCD camera 50B is supported by a support device (not shown) so as to be positioned on one side of the inspection tray 20. The XYZ stage 40B includes an X-axis motor 47a, a Y-axis motor 47b, and a Z-axis motor (not shown). Then, by driving and controlling the motors, the CCD camera 50B is moved in the direction orthogonal to the drawing (X direction) in FIG. 1, the horizontal direction (Y direction) in the drawing, and the vertical direction (Z direction) in FIG. Can be moved three-dimensionally. The CCD camera 50B moves in the X, Y, and Z directions orthogonal to each other on the XYZ stage 40B, so that the sample (that is, the intraocular lens) placed on the inspection tray 20 is viewed from the side. That is, the entire image of the optical unit 510 and both support units 520 of the intraocular lens 500 can be captured. The direction in which the CCD camera 50B images (that is, the Y direction) corresponds to the second direction. The XYZ stage 40A and the XYZ stage 40B correspond to stage means.

  Each of the CCD cameras 50 </ b> A and 50 </ b> B receives an imaging start signal from the controller 60, images the intraocular lens 500 on the inspection tray 20, and outputs the image data to the controller 60.

The CCD camera 50A corresponds to an imaging unit and a first imaging unit. The CCD camera 50B corresponds to an imaging unit and a second imaging unit.
(Controller 60)
The controller 60 includes a CPU such as a personal computer, includes an input device (not shown), and controls the image processing unit 60a based on an image processing program stored in a storage device (not shown). When the image processing unit 60a receives control of the controller 60 and inputs the image data, the image processing unit 60a performs image processing based on the image data. The controller 60 can control the illumination devices 30A and 30B on and off, and outputs an illumination on signal to the illumination device 30A before outputting the imaging start signal to the CCD cameras 50A and 50B. After the imaging of the cameras 50A and 50B is completed, an off signal is output to the illumination devices 30A and 30B.

(External device 80)
The external device 80 is composed of a CPU such as a personal computer. The external device 80 controls the X-, Y-, and Z-directions of the XYZ stages 40A and 40B in order to control the X-axis motor drivers 81A and 81B, Y-axis motor drivers 82A and 82B, and Z-axis motor drivers. 83A and 83B are provided. The external device 80 controls the X-axis motors 45a and 47a, the Y-axis motors 45b and 47b, and the Z-axis motor (not shown) via each driver.

  With this control, the CCD camera 50A can be positioned on the optical axis of the optical unit 510 of the intraocular lens 500 disposed on the inspection tray 20. In addition, by the control, the CCD camera 50B can be positioned at a position where the entire image of the optical part 510 of the intraocular lens 500 disposed on the inspection tray 20 and the side surfaces of the both support parts 520 is taken. That is, the intraocular lens 500 disposed on the inspection tray 20 can be imaged by the CCD cameras 50A and 50B by controlling the driving of the XYZ stages 40A and 40B in the X, Y, and Z directions. It is. The external device 80 can perform various data communications with the controller 60.

Now, the operation of the inspection apparatus 10 configured as described above will be described.
When inspecting the intraocular lens 500, the inspector places the intraocular lens 500 on the inspection tray 20 as shown in FIGS. 14 (a) and 14 (b). At this time, the optical unit 510 is supported by the peripheral edge of the optical surface going downward contacting the tapered surface 222 as shown in FIG. The pair of support portions 520 are passed between the pins 250 and 251 and between the pins 260 and 261, respectively. As described above, since the support portion 520 is passed between the pins 250 and 251 and between the pins 260 and 261 and is held by the pins, the intraocular lens 500 is applied even if force is applied to the intraocular lens 500. However, for example, the taper hole 220 does not rotate.

  FIG. 3 is a flowchart of a control process of the controller 60 when the intraocular lens 500 is imaged by controlling the CCD cameras 50A and 50B and image processing is performed on the obtained image data (sometimes simply referred to as an image). is there. When there is an input operation for starting imaging of an input device (not shown) by an inspector, the controller 60 starts the processing of the flowchart shown in FIG. 3 according to a control program (not shown).

  When this control process is started, the controller 60 first turns on the illumination devices 30A and 30B (see S10A and S10B) and illuminates the inspection tray 20 with the illumination devices 30A and 30B. The intraocular lens 500 is simultaneously imaged at 50A and 50B (see S20A and S20B). 3 to 5 and 8 to 10, S represents a step. In subsequent steps S30A and S30B, the controller 60 makes a transfer request for images obtained by the CCD cameras 50A and 50B, and inputs the images. In S <b> 40, the controller 60 ends the flowchart after performing image processing of the input image and shape measurement of the intraocular lens 500 based on the image processing.

(Upper image processing and measurement))
Next, a detailed description of the process of S40 will be described with reference to FIGS. In S40, processing is roughly divided and processing of the upper image of the intraocular lens 500 obtained by imaging with the CCD camera 50A, and processing of the side image of the intraocular lens 500 obtained by imaging with the CCD camera 50B. And measurement are performed.

4 and 5 are flowcharts of image processing performed by the image processing unit 60a based on the upper image input from the CCD camera 50A.
In S100 of FIG. 4, the image processing unit 60a uses the normalized correlation based on a reference image that is stored in advance in a storage device (not shown) and is an upper image of the inspection tray 20 on which the intraocular lens 500 is not placed. A reference point is calculated by pattern matching, that is, a reference point of the input upper image is determined (see FIG. 6A). The reference point is an arbitrary location and is set based on a reference image in advance. Further, the reference image is an image in a state where only the inspection tray 20 is viewed in a plan view, in which the intraocular lens 500 is not captured, and includes images of the bars 270 and 271. In this embodiment, a predetermined area including the bar 270 in the reference image and an area of the bar 270 in the image obtained by imaging the intraocular lens 500 are used as matching portions.

  In S101, the image processing unit 60a corrects the entire measurement region indicating the entire region in which the measurement is performed based on the reference point of the upper image. 6, 7, 11, and 12 show images in image processing. For convenience of explanation, the image corresponds to portions corresponding to the configurations of the intraocular lens and the inspection tray. The same reference numerals are assigned to the parts to be applied.

(Measurement processing of optical part diameter A and optical part center D)
In S102, the image processing unit 60a detects points P1 to P3 located at different positions from the optical unit edge on the opening 242 (see FIG. 6B). In S103, the image processing unit 60a calculates a circle passing through the points P1 to P3, and calculates a radius and the center of the circle. In S104, the image processing unit 60a sets the optical part diameter A to be twice the radius calculated in S103 and sets the center to the optical part center D. As described above, S102 to S104 are measurement processes of the optical part diameter A and the optical part center D.

(Measurement of full length B)
In S105, the image processing unit 60a resets the storage areas of the longest distances B1 and B2 of the storage device (not shown) to zero.

  In S <b> 106, the image processing unit 60 a determines whether or not the full length detection regions K <b> 1 and K <b> 2 have reached the end point on the free end side of the support unit 520 (that is, the outer peripheral edge of the free end). The full length detection areas K1 and K2 are scanning windows respectively provided corresponding to the arc portions 520b of both support portions 520, and can detect the arc portion 520b of the support portion 520 as shown in FIG. 6C. Set to area. Then, as shown in FIG. 6C, the full length detection areas K1, K2 can be detected by detecting the arc portion 520b of the support portion 520 by rotating around the optical portion center D in the scanning direction. The full length detection regions K1 and K2 are located at positions 180 ° opposite to each other with the optical part center D interposed therebetween, and scanning is started from a predetermined initial position, for example, the position shown in FIG.

  In S106, when the end point on the free end side of the support portion 520 (that is, the outer peripheral edge of the free end) is not detected by the scanning of the full length detection areas K1 and K2, the image processing unit 60a determines “YES”. Then, the process proceeds to S118. If not, “NO” is determined. When the image processing unit 60a determines “NO” in S106, in S107, the image processing unit 60a proceeds to the rotation angle α (the rotation angle α will be described later) of the full length detection regions K1 and K2. The full length detection areas K1 and K2 are rotated about the optical part center D.

  In S108, the image processing unit 60a detects the support unit 520 using the full length detection regions K1 and K2. That is, the points P4 and P5 on the outer peripheral edge portion of the support portion 520 are detected. In S109, the image processing unit 60a confirms whether or not the point P4 is detected on one of the support units 520 (see FIG. 7A). If the point P4 cannot be detected, the process jumps to S113. To do. In S109, when the image processing unit 60a determines that the point P4 is detected, the process proceeds to S110.

  In S110, the image processing unit 60a calculates the distance β1 between the optical unit center D and the point P4. In S111, the image processing unit 60a compares the distance β1 with the longest distance B1 stored in the storage area (not shown). If the distance β1 is longer than the longest distance B1, the image processing unit 60a The distance B1 is updated to the value of the distance β1, and the process proceeds to S113. In S111, when the image processing unit 60a determines that the distance β1 is equal to or less than the longest distance B1, the process proceeds to S113.

  In S113, the image processing unit 60a confirms whether or not the point P5 is detected on the other support unit 520 (see FIG. 7A). If the point P5 cannot be detected, the process jumps to S117. To do. If the image processor 60a determines in step S113 that the point P5 has been detected, the process proceeds to step S114.

  In S114, the image processing unit 60a calculates the distance β2 between the optical unit center D and the point P5. In S115, the image processing unit 60a compares the distance β2 with the longest distance B2 stored in the storage area (not shown). If the distance β2 is longer than the longest distance B2, in S116, The longest distance B2 is updated to the value of the distance β2, and the process proceeds to S117. In S115, when the image processing unit 60a determines that the distance β2 is equal to or less than the longest distance B2, the process proceeds to S117.

  In S117, the image processing unit 60a increments the rotation angle correction amount Δα to the previous rotation angle α, updates it as a new rotation angle α, and returns to S106. This new rotation angle α is used in S107 described above.

  Next, when the image processing unit 60a determines “YES” in S106, the image processing unit 60a calculates the total length B by adding the updated longest distance B1 and longest distance B2 in S118. As described above, S105 to S118 are steps of measurement processing of the full length B (see FIG. 5).

(Measurement process of effective optical part diameter C)
In S119, the image processing unit 60a sets the storage area of the shortest distances C1 and C2 of the storage device (not shown) to 100. The numerical value to be set is the number of pixels, and this numerical value is a number set in advance according to the assumed length of the effective optical part diameter C.

  In S120, the image processing unit 60a determines whether or not the effective optical unit detection regions U1 and U2 have reached the end point on the attachment end side of the support unit 520 (that is, the inner peripheral side edge of the attachment end). The effective optical part detection areas U1 and U2 are scanning windows arranged so as to be orthogonal to the straight line parts 520a of both support parts 520, and as shown in FIG. 7B, in the straight line part 520a of the support part 520, The attachment end in the optical unit 510 is set to a detectable region. And the effective optical part detection areas U1, U2 can detect the attachment end of the straight part 520a of the support part 520 by being translated in the scanning direction shown in FIG. The effective optical part detection areas U1 and U2 start scanning from a predetermined initial position, for example, from a position separated from each linear part 520a as shown in FIG. 7B.

  In S120, when both the end points on the attachment end side of the support portion 520 (that is, the inner peripheral edge of the attachment end) are detected by the scanning of the effective optical part detection areas U1 and U2, the image processing unit 60a It determines with "YES" and transfers to S132, and when that is not right, it determines with "NO".

  If the image processing unit 60a determines “NO” in S120, in S121, the image processing unit 60a advances the effective optical unit detection areas U1 and U2 to the target positions (the target positions will be described in S131 described later). . In S122, the image processing unit 60a detects the attachment end of the support unit 520 using the effective optical unit detection areas U1 and U2. That is, the points P6 and P7 on the edge part of the attachment end of the support part 520 are detected.

  In S123, the image processing unit 60a confirms whether or not the point P6 is detected on one of the support units 520 (see FIG. 7C), and “NO” is detected when the point P6 cannot be detected. And jump to S127. In S123, if the image processing unit 60a determines that the point P6 is detected, the process proceeds to S124.

  In S124, the image processing unit 60a calculates the distance β3 between the optical unit center D and the point P6. In S125, the image processing unit 60a compares the distance β3 with the shortest distance C1 stored in the storage area (not shown). If the distance β3 is less than the shortest distance C1, the image processing unit 60a The distance C1 is updated to the value of the distance β3, and the process proceeds to S127. In S125, when the image processing unit 60a determines that the distance β3 is equal to or greater than the shortest distance C1, the process proceeds to S127.

  In S127, the image processing unit 60a confirms the presence or absence of the detection of the point P7 on the other support unit 520 (see FIG. 7C). If the point P7 cannot be detected, the process jumps to S131. To do. In S127, if the image processing unit 60a determines that the point P7 is detected, the process proceeds to S128.

  In S128, the image processing unit 60a calculates the distance β4 between the optical unit center D and the point P7. In S129, the image processing unit 60a compares the distance β4 with the shortest distance C2 stored in the storage area (not shown). If the distance β4 is less than the shortest distance C2, the image processing unit 60a performs the shortest in S130. The distance C2 is updated to the value of the distance β4, and the process proceeds to S131. If the image processing unit 60a determines in S129 that the distance β4 is equal to or greater than the shortest distance C2, the process proceeds to S131. In S131, the image processing unit 60a updates the target position by adding the position correction amount to the previous position of the effective optical part detection areas U1 and U2, and returns to S120. This new target position is used in S121.

  If it is determined as “YES” in S120 and the process proceeds to S132, the image processing unit 60a compares the shortest distance C1 and the shortest distance C2 stored in a storage device (not shown). In S132, if the shortest distance C1> the shortest distance C2, in S133, the image processing unit 60a calculates twice the shortest distance C2, sets this calculated value as the effective optical part diameter C, and ends this flowchart. . In S132, when the shortest distance C1 ≦ the shortest distance C2, in S134, the image processing unit 60a calculates twice the shortest distance C1, and sets the calculated value as the effective optical part diameter C. finish.

(Side image processing and measurement)
Subsequently, image processing and measurement of a side image input from the CCD camera 50B will be described. 8 to 10 are flowcharts of image processing performed by the image processing unit 60a based on the side image input from the CCD camera 50B.

  In S200 of FIG. 8, the image processing unit 60a performs normalization correlation based on a reference image that is stored in advance in a storage device (not shown) and is a side image of the inspection tray 20 on which the intraocular lens 500 is not placed. The reference point is calculated by the matching used, that is, the reference point of the input side image is determined (see FIG. 11A).

  The reference point is an arbitrary location and is set based on a reference image in advance. The reference image is an image in which only the inspection tray 20 is viewed from the side where the intraocular lens 500 is not captured, and includes images of the pins 250 and 251. In this embodiment, a predetermined region including the pins 250 and 251 in the reference image and a region of the pins 250 and 251 in the image obtained by capturing the intraocular lens 500 are used as pattern matching portions.

In S201, the image processing unit 60a corrects all measurement areas indicating all areas to be measured based on the reference point of the side image.
(Measurement processing of optical part center thickness F)
Subsequently, as shown in FIG. 11B, in S202, the image processing unit 60a detects three different points on the edge of the optical surface on the upper side of the optical unit 510. These three points are designated as points P11, P12, and P13, respectively. In S203, the image processing unit 60a detects three different points on the edge of the lower optical surface of the optical unit 510. As shown in FIG. 11B, these three points are designated as points P14, P15, and P16, respectively. In the present embodiment, the optical unit 510 of the intraocular lens 500 is a biconvex in which both optical surfaces are convex.

  In S204, the image processing unit 60a calculates a circle R1 that passes through the points P11 to P13, and in S205, calculates a circle R2 that passes through the points P14 to P16. Next, in S206, the image processing unit 60a calculates intersections Q1 and Q2 of the circle R1 and the circle R2.

  Next, as shown in FIG. 11C, the image processing unit 60a calculates a straight line M1 passing through the intersection points Q1 and Q2 in S207, and in S208, the vertical bisect of the straight line M1 between the intersection points Q1 and Q2. The line N1 is calculated. Next, as illustrated in FIG. 11D, in S209, the image processing unit 60a calculates an intersection Q3 of the circle R1 and the vertical bisector N1.

  Next, in S210, the image processing unit 60a calculates an intersection Q4 between the circle R2 and the vertical bisector N1 (see FIG. 11D). In step S211, the image processing unit 60a calculates the distance between the intersections Q3 and Q4, and sets the calculated result as the optical unit center thickness F. Thus, S202 to S211 are steps of the measurement process of the optical part center thickness F.

(Measurement processing of support part angles E1 and E2)
Next, in S212, the image processing unit 60a calculates a tangent line J that passes through the intersection point Q4 on the circle R2 (see FIG. 12A), and in S213, 2 at each edge on the upper surface side of each support unit 520. Two points (that is, a total of 4 points) are detected. These points are represented by points P17 to P20, respectively (see FIG. 12B). Next, in S214, the image processing unit 60a calculates a straight line M2 passing through the points P17 and P18 on the one support unit 520 side. In S215, a straight line M3 passing through the points P19 and P20 on the other support unit 520 side is calculated. calculate.

  Subsequently, in S216, the image processing unit 60a calculates an angle γ1 where the tangent line J and the straight line M2 intersect (hereinafter referred to as an intersection angle) γ1, and in S217, calculates an intersection angle γ2 of the tangent line J and the straight line M3. In step S218, the image processing unit 60a sets the intersection angle γ1 as one support portion angle E1 (the support portion angle of the left support portion 520 in FIG. 12B), and sets the intersection angle γ2 as the other support portion angle E2 ( In FIG. 12 (b), the angle is the support portion angle of the right support portion 520). As described above, S213 to S218 are steps of the support portion angle measurement process.

(Measurement processing of Sagitta H and Vault Height G)
Subsequently, in S219, the image processing unit 60a resets the storage areas of the longest distances W1 and W2 of the storage device (not shown) to zero. Next, in S220, the image processing unit 60a determines whether or not the support unit highest point detection areas V1 and V2 have reached the end point of the support unit 520. The support portion highest point detection areas V1 and V2 are scanning windows arranged so as to be orthogonal to the tangent line J shown in FIG. 12A, and can be detected by the support portion 520 as shown in FIG. Set to area. The support portion highest point detection areas V1, V2 can be detected in parallel with the scanning direction shown in FIG. 12C (the direction in which the tangent line J extends), so that the highest point of the support portion 520 can be detected. The support portion highest point detection areas V1 and V2 start scanning from a predetermined initial position, for example, the position shown in FIG.

  In S220, when both end points of the support part 520 are detected by scanning of the support part highest point detection areas V1 and V2, the image processing part 60a determines “YES” and proceeds to S232, otherwise. In this case, it is determined as “NO”.

  When the image processing unit 60a determines “NO” in S220, in S221, the image processing unit 60a sets the support portion highest point detection areas V1 and V2 to the target positions (the target positions will be described in S231 described later). Proceed. In S222, the image processing unit 60a detects the points P21 and P22 of the upper edge portion of the support unit 520 by using the support unit highest point detection areas V1 and V2.

  In S223, the image processing unit 60a confirms the presence or absence of detection of the point P21 on one of the support units 520 (see FIG. 12D). If the point P21 cannot be detected, “NO” is determined. And jump to S227. If the image processing unit 60a determines in step S223 that the point P21 has been detected, the process proceeds to step S224. In S224, the image processing unit 60a calculates the length of the perpendicular line (hereinafter referred to as the distance T1) from the point P21 to the tangent line J.

  In S225, the image processing unit 60a compares the distance T1 with the longest distance W1 stored in the storage area of the storage device (not shown). If the distance T1 is equal to or longer than the longest distance W1, the image processing unit 60a W1 is updated to the value of the distance T1, and the process proceeds to S227. In S225, when the image processing unit 60a determines that the distance T1 is less than the longest distance W1, the process proceeds to S227.

  In S227, the image processing unit 60a confirms the presence or absence of detection of the point P22 on the other support unit 520 (see FIG. 12D). If the point P22 cannot be detected, the process jumps to S231. To do. If the image processor 60a determines in step S227 that the point P22 has been detected, the process proceeds to step S228.

  In S228, the image processing unit 60a calculates the length of the perpendicular line from the point P22 to the tangent line J (hereinafter referred to as distance T2). In S229, the image processing unit 60a compares the distance T2 with the longest distance W2 stored in the storage area of the storage device (not shown). If the distance T2 is equal to or longer than the longest distance W2, the image processing unit 60a W2 is updated to the value of distance T2, and the process proceeds to S231. If the image processing unit 60a determines in S229 that the distance T2 is less than the longest distance W2, the process proceeds to S231.

  In S231, the image processing unit 60a updates the target position by adding the position correction amount to the previous position of the support portion highest point detection areas V1 and V2, and returns to S220. This new target position is used in S221.

  If the image processing unit 60a determines “YES” in S220 and the process proceeds to S232, the image processing unit 60a determines in S232 whether the longest distance W1 stored in a storage device (not shown) and the longest distance W2 are larger or smaller. Compare. If the longest distance W1 ≧ the longest distance W2 in S232, the image processing unit 60a calculates the vault height G in S233. Specifically, the image processing unit 60a calculates the vault height G by subtracting the optical unit center thickness F from the longest distance W1, and proceeds to S234.

  In S234, the image processing unit 60a determines whether or not the longest distance W1 ≧ the optical part center thickness F. If the longest distance W1 ≧ the optical part center thickness F, in S235, the Sagitta H is set to the longest distance. This flowchart is ended with the value of W1. If the longest distance W1 <the optical part center thickness F in S234, the image processing unit 60a sets the value of the sagittal H to the value of the optical part center thickness F in S239 and ends this flowchart.

  In S232, when the longest distance W1 <the longest distance W2, the image processing unit 60a calculates the vault height G in S236. Specifically, the image processing unit 60a calculates the vault height G by subtracting the optical unit center thickness F from the longest distance W2, and proceeds to S237.

  In S237, the image processing unit 60a determines whether or not the longest distance W2 ≧ the optical part center thickness F. If the longest distance W2 ≧ the optical part center thickness F, in S238, the Sagitta H is set to the longest distance. This flowchart is ended with the value of W2. In S237, if the longest distance W2 <the optical part center thickness F, in S239, the image processing unit 60a sets the value of the sagittal H to the value of the optical part center thickness F, and ends this flowchart.

  As described above, shape measurement is performed by image processing of the image processing unit 60a, and the obtained optical part diameter A, full length B, effective optical part diameter C, support part angles E1, E2, sagittal H, vault height G, The controller 60 outputs various data of the optical part center thickness F to the external device 80.

  The external device 80 receives input of the various data from the controller 60, and determines whether or not the data is appropriate, that is, performs an inspection. Determination values set in advance corresponding to the measurement items of the various data for determining the suitability are stored in a storage device (not shown) provided in the external device 80. Then, an inspection is performed by the external device 80 comparing the input various data with the determination value.

  The external device 80 determines the suitability of the various data based on these judgment values, and the result of this suitability judgment, that is, the inspection result is output from the external device 80 to the controller 60. Then, the controller 60 displays the inspection result on the monitor 70 to inform the inspector. Thus, the external device 80 corresponds to an inspection unit.

Now, the embodiment configured as described above has the following features.
(1) In the shape measuring method of the intraocular lens 500 and the inspection apparatus 10 described above, the intraocular lens 500 is imaged by the CCD cameras 50A and 50B from two different directions, and the intraocular lens 500 is taken from the Z direction and the Y direction. The image obtained by imaging was continuously processed. Then, the shape measurement of the optical part diameter A, the total length B, the effective optical part diameter C, and the optical part center D of the intraocular lens 500 is performed by image processing of the upper image obtained by imaging from the Z direction. In addition, the shape measurement of the support portion angles E1, E2, the sagittal H, the vault height G, and the optical portion center thickness F of the intraocular lens 500 is performed by image processing of the side image obtained by imaging from the Y direction. I did it.

  As a result, the shape measurement (dimension measurement) of the intraocular lens 500 can be performed in a space-saving and highly accurate manner. Moreover, since the intraocular lens 500 is imaged from two directions and the obtained images are continuously processed, the measurement and inspection time of the intraocular lens 500 can be greatly shortened.

  (2) In the present embodiment, the CCD camera 50B (second imaging unit) captures a state in which the intraocular lens 500 is viewed from the side, that is, the entire image of the optical unit 510 and both support units 520 of the intraocular lens 500. Since they are arranged at possible positions, all the support parts 520 provided in the intraocular lens 500 can be imaged by the CCD camera 50B.

  (3) In the present embodiment, when the illuminating devices 30A and 30B are respectively arranged on the opposite side of the CCD cameras 50A and 50B across the intraocular lens 500, and the intraocular lens 500 is imaged by the CCD cameras 50A and 50B. In addition, the illumination devices 30A and 30B were used for irradiation.

  As a result, the light emitted from the illuminating devices 30A and 30B passes through or is blocked by the intraocular lens 500, and the imaging unit can capture the shadow generated at that time. As a result, a special shape such as the intraocular lens 500 having the support portion 520 can be imaged as a shadow.

  (4) In the present embodiment, the illumination device 30B employs red LED illumination that is complementary to each other and easy to obtain at low cost because the support portion 520 of the intraocular lens 500 has a blue color. As a result, it is possible to improve the shadow contrast of the support portion 520 that is a transparent body, and to further improve the accuracy of shape measurement (dimension measurement).

  (5) In the present embodiment, the illumination device 30A emits a blue color having a short wavelength in the visible light region as a main wavelength. As a result, light having a short wavelength is easily affected by refraction and is easily scattered when passing through the optical unit 510, so that the amount of light that passes through the optical unit 510 and reaches the imaging unit is reduced. The contrast of a shadow of a transparent body such as a lens can be improved, and the accuracy of shape measurement (dimension measurement) can be improved.

  (6) In the present embodiment, the illuminating device 30A arranged for the CCD camera 50A uses a backlight blue light emitting diode, and the illuminating device 30B arranged for the CCD camera 50B uses a backlight type light emitting diode. A red light emitting diode was used. As a result, since the backlight type light emitting diode is used as the illumination device, when the intraocular lens 500 is irradiated with light away from the intraocular lens 500, the light reaching the optical unit 510 is parallel. Light which is limited to the near component and is not parallel, that is, scattered light does not reach the optical unit 510. When the scattered light reaches the optical unit 510, it is refracted by the optical unit, and a part of the light often reaches the image pickup means, which is a cause of lowering the contrast of the optical unit 510. Therefore, by separating the illumination device from the intraocular lens 500, the contrast of the optical unit 510 can be improved, and the measurement accuracy of a transparent body such as the optical unit can be further improved.

  (7) In the present embodiment, the XYZ stages 40A and 40B that support the CCD cameras 50A and 50B so as to be movable three-dimensionally are provided. As a result, the position of the CCD cameras 50A and 50B can be adjusted by moving the CCD cameras 50A and 50B three-dimensionally by the XYZ stages 40A and 40B. A suitable image can be obtained.

  (8) In the inspection tray 20 of the present embodiment, when the optical unit 510 of the intraocular lens 500 is placed on the tapered surface 222 by forming the tapered surface 222 on the surface of the sample support unit 210, the optical unit 510. Can be supported by its own edge. As a result, when the shape inspection of the intraocular lens 500 is performed, there is no possibility of scratching the surface of the optical part other than the edge or attaching dirt. Furthermore, since the inspection tray 20 supports the edge of the optical unit 510 of the intraocular lens 500, the shape retention is improved even in the case of the intraocular lens 500 having high flexibility. Further, the intraocular lens 500 can be stably held.

  (9) Since the inspection tray 20 of the present embodiment has the through hole 230, for example, the optical unit 510 is arranged so as to be coaxial with the through hole 230, and the inspection marker is inserted through the optical unit 510 and the through hole 230. By observing the above, it is possible to measure the resolving power of the optical unit and the lens power.

  As described above, in this inspection tray 20, by placing the intraocular lens 500 on one inspection tray 20, measurement with a plurality of inspection apparatuses becomes possible. That is, the inspection tray 20 can perform inspection by measurement performed by observing from the axial center direction of the through hole 230 and inspection by measurement performed by observing from the direction in which the groove 240 extends. As a result, as the number of corresponding inspection apparatuses increases, the work time for placing the intraocular lens 500 can be reduced, and the number of times the operator touches the intraocular lens 500 can be reduced. Can be greatly reduced.

  Moreover, in this inspection tray 20, since the optical part 510 of the intraocular lens 500 can be observed from the direction in which the groove 240 extends, the inclination of the intraocular lens 500 with respect to the inspection tray 20 can be easily known.

  (10) Here, in general, an acrylic resin or a polyacetal resin is particularly preferable as the material of the inspection tray from the viewpoint of transparency and workability. However, since these resins are not suitable for mass processing, an inspection tray is not prepared and used for each intraocular lens, and one inspection tray is repeatedly used. Therefore, in the conventional inspection, as the frequency of use of one inspection tray is accumulated, the inspection tray is contaminated, and there is a concern about the adverse effect of adhesion of dust and dirt on the optical part of the intraocular lens. Further, when the inspection tray is translucent, the background contrast is significantly lowered due to the occurrence of light transmission unevenness and the like. Then, the optical part (lens) edge becomes unclear, and there is a possibility that the accuracy of shape measurement is remarkably lowered.

  On the other hand, the inspection tray 20 of this embodiment is formed of transparent polypropylene. Polypropylene is easy to mold and inexpensive, so it can be disposable. If you use the inspection tray more often, there will be more opportunities for dust to adhere, and it will be more likely that dust will adhere to the intraocular lens placed for the next inspection. Such a fear disappears. In addition, since the inspection tray is transparent, the occurrence of uneven transmission of light does not occur and the contrast of the background does not significantly decrease, so the optical part (lens) edge becomes unclear or has a shape. There is no possibility that the accuracy of measurement is significantly reduced.

The present invention is not limited to the above embodiment, and may be configured as follows.
(1) In the above embodiment, the optical part diameter A, the total length B, the effective optical part diameter C, the optical part center D, the support part angles E1, E2 of the intraocular lens, the sagittal H, the vault height G, and Although the optical part center thickness F is measured, not all of these may be measured, but the following may be performed.

  By image processing of the upper image, at least one shape measurement is performed from among the optical part diameter A, the total length B, the effective optical part diameter C, and the optical part center D of the intraocular lens. In addition, at least one of the shape measurements is performed from the support portion angles E1 and E2, the sagittal H, the vault height G, and the optical portion center thickness F by image processing of the side image.

  (2) In the above-described embodiment, the intraocular lens 500 is simultaneously imaged by the CCD camera 50A and the CCD camera 50B. However, it is not necessary to simultaneously image, and the imaging order is determined and images are continuously captured. May be.

  (3) In the above embodiment, the image processing of the side image is continuously performed after the image processing of the upper image. However, the image processing of the side image is simultaneously performed after the image processing of the upper image. You may do it.

  (4) In the above-described embodiment, the pair of pins 250 and the like constituting the set is a pair (that is, two), but a set of three or more pins may be provided. In short, any number may be used as long as the intraocular lens can be prevented from rotating by passing the supporting portion 520 of the intraocular lens 500 between the pins and holding it.

  (5) In the above embodiment, the pins 251 and 261 are arranged so as to be located on a circle centered on the axis Ot of the tapered hole 220 (that is, the axis of the through hole 230), and the axis of the tapered hole 220 Although it arrange | positions so that it may be located on the circle centering on the center Ot (namely, axial center of the through-hole 230), it is not limited to this. For example, the pins 251 and 261 are arranged so as to be positioned on a circle centered on the axis Ot of the tapered hole 220 (that is, the axis of the through hole 230) and are in contact with the tapered surface 222. Also good. Even in this configuration, the edge of the optical unit 510 of the intraocular lens 500 can be supported by the tapered surface 222.

  (6) In the embodiment, the inspection tray 20 is transparent. However, the inspection tray 20 is not limited to being transparent, and may be formed of a translucent material. Even if the inspection tray is translucent, an image of the intraocular lens can be obtained, and the shape of the intraocular lens can be measured. When it is translucent and visibility (or contrast) deteriorates, a hole may be provided in the sample support portion.

(7) In the above-described embodiment, the bars 270 and 271 are provided to the frame body 110 via a bracket (not shown), but may be provided on the inspection tray 20.
(8) In the above-described embodiment, the bars 270 and 271 are provided as the pair of light blocking members. However, the shape is not limited to the bar shape, and other shapes may be used.

  (9) In the above-described embodiment, the CCD cameras 50A and 50B as the imaging means can be three-dimensionally moved by the XYZ stages 40A and 40B. However, the illumination devices 30A and 30B are replaced by the XYZ stage 40A. , 40B may be three-dimensionally movable. In this case, since the positions of the illumination devices 30A and 30B can be adjusted, when the intraocular lens is imaged, the exposure amount that can be obtained by the CCD cameras 50A and 50B can be suitably adjusted, so that a suitable image can be obtained. Obtainable.

  (10) In the above embodiment, in the flowchart of FIG. 3, S10A to S30A and S10B to S30B are processed in parallel. S10A to S30A may be executed later.

  (11) In the above embodiment, the optical unit 510 of the intraocular lens 500 is biconvex. However, when the lens shape of the optical unit 510 is meniscus, it may be as follows. That is, when the lens shape of the optical unit 510 is a meniscus, the lower optical surface of the optical unit 510 cannot actually be seen, so it is impossible to calculate a circle from three points. Therefore, in this case, in S203, two points on the lens edge are detected only on the lower surface of the image obtained by imaging, and a straight line is calculated. This straight line is replaced in place of the circle R2, and the same measurement as in the biconvex is performed. The optical part center thickness F measured by this method is the apparent optical part center thickness (the distance between the upper optical surface vertex and the lower lens edge).

  (12) In the CCD cameras 50A and 50B, a CCD is used as a solid-state imaging device that is an image sensor. However, a CMOS may be used as an imaging means, or an imaging tube or the like may be used.

  (13) The shape measurement of the intraocular lens is performed by measuring the shape of 3P (three-piece) -IOL (intraocular lens), but is not limited to the shape measurement of 3P-IOL, and is 1P (one piece) If it is IOL which has support parts, such as -IOL and adjustability IOL, those shape measurements can be performed.

1 is an overall schematic diagram of an intraocular lens inspection apparatus according to an embodiment of the present invention. (A), (b) is explanatory drawing of the inspection item of an intraocular lens. The flowchart of the control processing of the controller 60 of. The flowchart which shows an image process. The flowchart which shows an image process. (A)-(c) is explanatory drawing of image processing. (A)-(c) is explanatory drawing of image processing. The flowchart which shows an image process. The flowchart which shows an image process. The flowchart which shows an image process. (A)-(d) is explanatory drawing of image processing. (A)-(d) is explanatory drawing of image processing. (A) is a top view of an inspection tray, (b) is a longitudinal cross-sectional view similarly. (A) is a top view which shows the effect | action of an inspection tray, (b) is principal part sectional drawing which similarly shows the effect | action of an inspection tray. Explanatory drawing of a hue circle. Explanatory drawing of an illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inspection apparatus 20 ... Inspection tray 30A ... Illuminating device (illuminating means)
30B: Illumination device (illumination means)
40A, 40B ... XYZ stage (stage means)
50A ... CCD camera (imaging means, first imaging means)
50B ... CCD camera (imaging means, second imaging means)
60 ... Controller 60a ... Image processing section (measuring means)
70 ... monitor 80 ... external device (inspection means)

Claims (13)

The intraocular lens is imaged by imaging means from two different directions,
Image processing of images obtained by imaging the intraocular lens from different first and second directions simultaneously or sequentially,
For the image processing,
Image processing of an image obtained by imaging from the first direction, and by this image processing, at least one shape of the optical part diameter, the total length, the effective optical part diameter, and the optical part center of the intraocular lens Taking measurements,
Image processing of an image obtained by imaging from the second direction, and by this image processing, at least one shape of the support portion angle, the sagittal, the vault height, and the optical portion center thickness of the intraocular lens A method for measuring the shape of an intraocular lens, comprising measuring.   The imaging unit is positioned on an axis orthogonal to the optical axis of the intraocular lens, and images a side surface of the intraocular lens, the first imaging unit being positioned on the optical axis of the intraocular lens The method for measuring the shape of an intraocular lens according to claim 1, further comprising:   The intraocular lens shape measuring method according to claim 2, wherein the second imaging unit is arranged at a position where all the support portions of the intraocular lens can be imaged.   An illuminating unit is disposed on the opposite side of each imaging unit with the intraocular lens interposed therebetween, and the illuminating unit irradiates when the intraocular lens is imaged by each imaging unit. The shape measuring method for an intraocular lens according to any one of claims 1 to 3.   The illumination means is a monochromatic light source having a short wavelength in the visible light region as a main wavelength, or a complementary color-related color or a color similar to a complementary color-related color of at least a part of the intraocular lens to be measured. The method for measuring the shape of an intraocular lens according to claim 4, further comprising a monochromatic light source having a dominant wavelength. An inspection tray for placing an intraocular lens;
A pair of imaging means for imaging the intraocular lens disposed on the inspection tray from two different directions;
Image processing is performed on an image obtained by the pair of imaging units, and at least one of the optical part diameter, the total length, the effective optical part diameter, and the optical part center of the intraocular lens is based on the image. Measuring means for performing shape measurement and at least one shape measurement among a support portion angle, a sagittal, a vault height, and an optical portion center thickness of the intraocular lens;
An intraocular lens inspection apparatus, comprising inspection means for determining suitability of a measurement result of the measurement means.   The pair of imaging means is positioned on an axis orthogonal to the optical axis of the intraocular lens, the first imaging means for imaging by being located on the optical axis of the intraocular lens, and the side surface of the intraocular lens The intraocular lens inspection apparatus according to claim 6, further comprising: a second imaging unit that images The inspection tray is provided with an intraocular lens placement space that allows placement of an intraocular lens,
A pair of illumination means is arranged on the opposite side of each imaging means across the intraocular lens arrangement space,
The intraocular lens inspection apparatus according to claim 6 or 7, wherein when the intraocular lens is imaged by each of the imaging units, irradiation is performed by the illumination unit.     The illuminating means has a short wavelength in the visible light region as a main wavelength, or a complementary color related color or a color similar to a complementary color related color of at least a part of an intraocular lens to be measured as a main wavelength. The intraocular lens inspection apparatus according to claim 8, further comprising a monochromatic light source having the same. A light blocking member is disposed between the imaging unit and the illuminating unit located on opposite sides of the intraocular lens arrangement space,
The arrangement position of the light blocking member is a position that does not hinder the imaging of the whole image of the intraocular lens by the imaging unit and is a position that can be imaged by the imaging unit. Item 10. The intraocular lens inspection apparatus according to Item 9. In order to inspect the shape of the intraocular lens, in an inspection tray provided with a mounting portion for mounting the intraocular lens,
A tapered hole having a tapered surface on which the optical part of the intraocular lens can be placed is formed on the surface of the placement part,
While communicating with the tapered hole, a through-hole penetrating the mounting portion is formed,
An inspection tray, wherein a groove is formed on the surface of the mounting portion so as to cross the axis of the tapered hole. The mounting portion includes a holding portion for holding an intraocular lens,
The inspection tray according to claim 11, wherein two or more holding parts are provided for each support part protruding from the optical part of the intraocular lens.   Of the holding parts provided for each support part of the intraocular lens, the holding part closest to the axis of the through hole is located on a circle centered on the axis of the through hole, and the taper The inspection tray according to claim 12, wherein the inspection tray is in contact with the surface or the tapered surface.

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