JP2004017004A - Method and apparatus for discharging liquid medium and method for manufacturing optical member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for easily discharging a liquid medium uniformly and a method for manufacturing an optical member. <P>SOLUTION: The position and surface shape of the discharge-receiving surface of a discharge-receiving object 1, to which the liquid medium having fluidity is discharged, in the liquid medium discharging direction, are recognized. A liquid drop discharging head 30 having a plurality of nozzles for discharging the liquid medium is moved relatively to the object 1 on the basis of the recognized position and surface shape of the discharge-receiving surface in such a state that the head 30 is faced to the discharge-receiving surface while leaving the prescribed gap between them. The liquid medium is discharged onto the discharge-receiving surface of the object 1 in the described range from each of the nozzles of the head 30 by moving the head 30 as mentioned above. As a result, the liquid medium can be discharged uniformly onto the surface of the object 1 according to the surface curvature or the like of the object 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and apparatus for discharging a liquid, which discharges a liquid having fluidity to an object to be discharged. The present invention also relates to a method for manufacturing an optical member that forms a film by discharging a liquid material on the surface of an optical element.
[0002]
[Background Art]
2. Description of the Related Art Conventionally, an optical element such as a lens used for spectacles has been subjected to a surface treatment for forming a cured film, an antireflection film, and the like on the surface thereof. As a method of the surface treatment, a spin coating method and a dipping (immersion) method are known.
[0003]
In the spin coating method, a hard coat liquid or the like as a material for a cured film is dropped on the surface of an optical element, and the optical element is rotated at a high speed. Due to this rotation, the hard coat liquid or the like spreads thinly over the entire surface of the optical element and is applied in a film form to form a hardened surface film.
However, in the spin coating method, most of the hard coat liquid or the like dropped on the surface of the optical element scatters around. Since the scattered hard coat liquid and the like contain impurities such as dust, the apparatus becomes complicated to collect the scattered hard coat liquid and the like and to reuse the collected hard coat liquid after removing the impurities. Therefore, it is difficult to reuse the hard coat liquid or the like.
[0004]
In the dipping method, the optical element is held by a jig, dipped in a hard coat solution or the like in a container, and then pulled up. As a result, a hard coat liquid or the like is attached and applied to the surface of the optical element, and a surface hardened film is formed.
However, in the dipping method, it is necessary to prepare a large amount of a hard coat liquid or the like in a container in advance. Further, as the optical element is repeatedly immersed in the hard coat liquid or the like, the properties such as viscosity change with time and gradually deteriorate. Therefore, in order to maintain the quality of the surface hardened film, the hard coat liquid or the like must be disposed and replaced in a predetermined period.
[0005]
Therefore, in the spin coating method and the dipping method, a large amount of a hard coat liquid used for surface treatment of an optical element is discarded. Furthermore, detoxification processing at the time of disposal is required. For this reason, the utilization efficiency of the raw material is poor, and this is a hindrance to energy saving and cost reduction in the surface treatment step of the optical element.
[0006]
In order to eliminate such waste of raw materials for the surface treatment, a technique disclosed in JP-A-2001-327908 previously developed by the present applicant has been proposed. The technique disclosed in the publication is to apply a surface treatment to an optical element by discharging a liquid material such as a hard coat liquid from a nozzle of a droplet discharge head and applying the liquid to the surface of the optical element. That is, the surface treatment of the optical element is to be performed by a so-called inkjet method.
[0007]
In the surface treatment of an optical element by an inkjet method, a required amount of a hard coat liquid or the like is discharged onto the surface of the optical element and applied in a film form. As a result, the use efficiency of the hard coat liquid or the like can be increased, so that energy saving and cost reduction in the surface treatment step can be expected. In addition, the droplet discharge head used in the ink jet method, a driving device for driving the droplet discharge head, a control device, and the like can be diverted to a surface treatment device simply by improving equipment used in an existing printer or the like. be able to.
[0008]
[Problems to be solved by the invention]
However, according to the prior art described in the above-mentioned publication, the discharge amount of the hard coat liquid or the like cannot be controlled according to the surface curvature or the like for each optical element having a different shape or surface curvature.
[0009]
That is, among the optical elements, especially in the case of a lens for spectacles, the thickness dimension and the surface curvature of the lens differ depending on the visual acuity of the user. Also, for example, in a progressive focus lens, the outer shape of the lens before the surface treatment is not a perfect circle, and the surface curvature partially changes in one lens depending on the user's eyesight. Therefore, in the inkjet method according to the related art, it is difficult to control an appropriate ejection amount for each lens having a different outer shape or surface curvature, and it is difficult to form a film having a uniform thickness. .
[0010]
Therefore, a method is conceivable in which, for each lens having a different external shape and surface curvature, these are set as a set value in a database. Then, as a pre-process of the surface treatment process, the set values for each lens are read from the database, and the discharge amount and the like are determined based on the set values so that the thickness of the film is uniform, and then the surface treatment process is performed. . However, as described above, since the shape of the lens for spectacles differs for each user, there is a problem that the work of creating a database becomes enormous, and the work of managing and reading the database requires a great deal of labor.
[0011]
An object of the present invention is to provide a method and apparatus for discharging a liquid material, which can easily and uniformly discharge a liquid material, and a method for manufacturing an optical element in view of such a problem.
[0012]
[Means for Solving the Problems]
A discharge device according to an aspect of the invention includes a droplet discharge head provided with a plurality of nozzles for discharging a liquid having fluidity to a discharge target, and at least one of the droplet discharge head and the discharge target. Recognizing a moving means for relatively moving one of them and a contour of the object to be ejected, and controlling at least one of ejection of the droplet discharge head and movement by the moving means based on the contour. Control means.
[0013]
In the present invention having such a configuration, by recognizing the outline of the object to be ejected, and discharging the liquid from the droplet discharge head based on the outline, the ejection of the liquid is performed according to the shape of the object to be ejected. The liquid material can be uniformly discharged onto the surface of the object to be discharged.
[0014]
In the present invention, it is preferable that the control unit controls the amount of the liquid material discharged onto the discharge target per unit area to be constant.
With this configuration, by controlling the amount of the liquid per unit area according to the shape of the object to be discharged, the liquid can be more uniformly discharged to the surface of the object to be discharged.
[0015]
Further, in the present invention, the control unit may determine at least one of the discharge of the droplet discharge head and the movement by the moving unit based on a magnitude of a distance between the droplet discharge head and the discharge target in a facing direction. It is preferable to control either one.
With this configuration, by controlling the movement of the droplet discharge head and the discharge amount of the liquid material in accordance with the distance between the droplet discharge head and the discharge target, when the surface of the discharge target is curved, Also, the liquid material can be uniformly discharged to the surface of the discharge target.
[0016]
In the present invention, it is preferable that the control unit controls the movement by the moving unit in a state where the distance between the droplet discharge head and the discharge target in the facing direction is constant.
With this configuration, the distance between the droplet discharge head and the discharge target is controlled to be constant, so that even when the surface of the discharge target is curved, the droplet discharge along the surface of the discharge target is performed. The head can be moved, and the liquid can be uniformly discharged onto the surface of the discharge target.
[0017]
Further, in the present invention, the control unit may be configured such that, for a discharge target surface as a predetermined surface of the discharge target discharging the liquid from the droplet discharge head, the discharge target surface in a direction in which the liquid is discharged. It is preferable to recognize at least one of the position and the surface shape of the surface to be ejected.
With this configuration, the position and the surface shape of the surface to be ejected are recognized, and the liquid is ejected from the droplet ejection head based on the position and the surface shape. The liquid can be ejected, and the efficiency of use of the liquid material can be increased, and the cost of the surface treatment of the object can be reduced.
[0018]
In the present invention, it is preferable that the control unit recognizes at least one of the position and the surface shape of the surface to be ejected based on image data obtained by imaging the object to be ejected.
With this configuration, by recognizing the position and the surface shape of the surface to be ejected from the image data of the object to be ejected, it is possible to reliably recognize the shape of the object to be ejected.
[0019]
Further, in the present invention, the control unit may perform image processing based on at least one of the position and the surface shape of the surface to be ejected, which is recognized based on the imaging data, and perform the image processing. It is preferable to include an image processing means for determining a gap with the droplet discharge head.
With this configuration, by performing image processing based on the position and surface shape of the surface to be ejected, the shape and surface curvature of the object to be ejected that are individually different are image-recognized, and the gap between the surface to be ejected and the droplet ejection head is determined. Can be determined appropriately.
[0020]
Further, in the present invention, the control unit discharges the droplet from the droplet discharge head by image processing based on at least one of the position and the surface shape of the discharge target surface recognized by the imaging data. Preferably, the apparatus further comprises an image processing means for determining an amount of the liquid material to be discharged.
With this configuration, by performing image processing based on the position and surface shape of the surface to be ejected, the shape and surface curvature of the object to be ejected that are different from each other are image-recognized, and an appropriate amount of the liquid material for each object to be ejected is recognized. Can be discharged, and the surface treatment accuracy of the discharge target can be further improved.
[0021]
Further, in the present invention, it is preferable that the object to be ejected is an optical element, and the liquid material is ejected onto a predetermined surface of the optical element to form a film.
With this configuration, it is possible to discharge the liquid according to the shape of the optical element by recognizing the outer contour of the optical element and discharging the liquid from the droplet discharge head based on the outer contour. Efficiency can be sufficiently improved, and the cost of the surface treatment operation of the optical element can be reduced.
[0022]
The ejection method of the present invention recognizes at least one of a position of a surface to be ejected as a predetermined surface of an object to be ejected from which a liquid material having fluidity is ejected and a surface shape of the surface to be ejected. A liquid ejecting head provided with a plurality of nozzles for ejecting the liquid material based on at least one of the position of the surface to be ejected and the surface shape; In a state where the liquid material is opposed to the object, the object is relatively moved, and the liquid material is discharged from each nozzle of the plurality of droplet discharge heads to a predetermined range of the surface to be discharged. Is what you do.
[0023]
In the present invention having such a configuration, the liquid material is discharged from the droplet discharge head based on the position and the surface shape of the discharge surface after recognizing the position and the surface shape of the discharge surface of the discharge object. The liquid material can be discharged according to the surface curvature of the discharge object, and the liquid material can be discharged uniformly on the surface of the discharge target.
[0024]
In the present invention, it is preferable that the amount of the liquid material discharged onto the object to be discharged per unit area is constant and the liquid material is discharged.
With this configuration, by controlling the amount of the liquid per unit area according to the shape of the object to be discharged, the liquid can be more uniformly discharged to the surface of the object to be discharged.
[0025]
In the present invention, based on the magnitude of the distance in the direction in which the droplet discharge head and the surface to be discharged are opposed to each other, of the discharge of the liquid material from the droplet discharge head and the movement of the droplet discharge head, It is preferable to control at least one of the above to discharge the liquid material.
With this configuration, by controlling the movement of the droplet discharge head and the discharge amount of the liquid material in accordance with the distance between the droplet discharge head and the discharge target, when the surface of the discharge target is curved, Also, the liquid material can be uniformly discharged to the surface of the discharge target.
[0026]
In the present invention, it is preferable that the liquid is discharged by controlling the movement of the droplet discharge head in a state where the distance between the droplet discharge head and the surface to be discharged in the facing direction is constant.
With this configuration, the distance between the droplet discharge head and the discharge target is controlled to be constant, so that even when the surface of the discharge target is curved, the droplet discharge along the surface of the discharge target is performed. The head can be moved, and the liquid can be uniformly discharged onto the surface of the discharge target.
[0027]
In the present invention, it is preferable that the object to be ejected is imaged, and at least one of the position and the surface shape of the surface to be ejected is recognized based on the imaged data.
With this configuration, by recognizing the position and the surface shape of the surface to be ejected from the image data of the object to be ejected, it is possible to reliably recognize the shape of the object to be ejected.
[0028]
Further, in the present invention, the droplet discharge head and the discharge target surface are subjected to image processing based on at least one of the position and the surface shape of the discharge target surface recognized by the imaging data. Preferably, the gap is determined.
With this configuration, by performing image processing based on the position and the surface shape of the surface to be ejected, the shapes and surface curvatures of different objects to be ejected are image-recognized, and the surface to be ejected is appropriately adjusted for each object to be ejected. The distance from the droplet discharge head can be determined.
[0029]
Furthermore, in the present invention, based on at least one of the position of the surface to be ejected and the surface shape recognized by the imaging data, the liquid material ejected from the droplet ejection head by image processing is processed. It is preferable to determine the discharge amount.
With this configuration, by performing image processing based on the position and surface shape of the surface to be ejected, the shape and surface curvature of the object to be ejected that are different from each other are image-recognized, and an appropriate amount of liquid Can be discharged, and the surface treatment accuracy of the discharge target can be further improved.
[0030]
Further, in the present invention, it is preferable that the object to be ejected is an optical element, and the liquid material is ejected onto a predetermined surface of the optical element to form a film.
With this configuration, it is possible to discharge the liquid according to the shape of the optical element by recognizing the outer contour of the optical element and discharging the liquid from the droplet discharge head based on the outer contour. Efficiency can be sufficiently improved, and the cost of the surface treatment operation of the optical element can be reduced.
[0031]
The method for manufacturing an optical member according to the present invention is an optical member having a film by discharging a liquid having fluidity on a surface of the optical element, and discharging the liquid. Recognizing at least one of the position of the surface to be ejected as a predetermined surface of the optical element and the surface shape of the surface to be ejected, and at least one of the position of the surface to be ejected and the surface shape. Based on one of them, a droplet discharge head provided with a plurality of nozzles for discharging the liquid material is moved relatively to the optical element in a state where the droplet discharge head is opposed to the surface to be discharged via a predetermined gap. The liquid material is formed by discharging the liquid material from each nozzle of the plurality of droplet discharge heads to a predetermined range on the surface to be discharged.
[0032]
In the present invention having such a configuration, after recognizing the position and the surface shape of the surface to be discharged of the optical element, the liquid material is discharged from the droplet discharge head based on the position and the surface shape, whereby the optical element The liquid material can be discharged according to the surface curvature or the like, and the liquid material can be discharged uniformly on the surface of the object to be discharged.
[0033]
In the present invention, it is preferable that the amount of the liquid material discharged to the optical element per unit area is constant and the liquid material is discharged.
With this configuration, by controlling the amount of the liquid per unit area according to the shape of the optical element, the liquid can be more uniformly discharged onto the surface of the optical element.
[0034]
In the present invention, based on the magnitude of the distance in the direction in which the droplet discharge head and the surface to be discharged are opposed to each other, of the discharge of the liquid material from the droplet discharge head and the movement of the droplet discharge head, Preferably, the liquid material is discharged by controlling at least one of the above.
With this configuration, by controlling the movement of the droplet discharge head and the discharge amount of the liquid in accordance with the distance between the droplet discharge head and the optical element, even when the surface of the optical element is curved, The liquid can be uniformly discharged onto the surface of the optical element.
[0035]
In the present invention, it is preferable that the liquid is discharged by controlling the movement of the droplet discharge head in a state where the distance between the droplet discharge head and the surface to be discharged in the facing direction is constant. .
With this configuration, by controlling the distance between the droplet discharge head and the optical element to be constant, even when the surface of the optical element is curved, the droplet discharge head moves along the surface of the optical element. This makes it possible to discharge the liquid uniformly on the surface of the optical element.
[0036]
And in this invention, it is preferable that the said optical element is a lens for spectacles.
With this configuration, in an eyeglass lens having different outer shapes, thickness dimensions, and surface curvatures for each user, it is possible to discharge a liquid material according to the shape, and to sufficiently increase the use efficiency of the liquid material, Cost required for the surface treatment step of the lens for use.
[0037]
In the present invention, it is preferable that the optical element includes a position recognition unit.
With this configuration, the liquid material can be discharged with higher accuracy by recognizing the position, direction, up, down, left, and right when the optical element is used, and the use efficiency of the liquid material can be further increased.
[0038]
In the aspect of the invention, it is preferable that the optical element is imaged and at least one of the position and the surface shape of the surface to be ejected is recognized based on the imaged data.
With this configuration, the shape and shape of the optical element can be reliably recognized by recognizing the position and surface shape of the surface to be ejected based on the image data of the optical element.
[0039]
Furthermore, in the present invention, the droplet discharge head and the discharge target surface are image-processed based on at least one of the position and the surface shape of the discharge target surface recognized by the imaging data. Preferably, the gap is determined.
With this configuration, image processing is performed based on the position and surface shape of the surface to be ejected, whereby the shapes and surface curvatures of different optical elements are image-recognized, and the surface to be ejected and the droplet are appropriately adjusted for each optical element. The distance from the ejection head can be determined.
[0040]
Further, in the present invention, based on at least one of the position and the surface shape of the surface to be ejected recognized by the imaging data, the liquid material ejected from the droplet ejection head by image processing is processed. It is preferable that the discharge amount is determined.
With this configuration, image processing is performed based on the position and surface shape of the surface to be ejected, whereby the shapes and surface curvatures of different optical elements are image-recognized, and an appropriate amount of liquid material is ejected for each optical element. The surface treatment accuracy of the optical member can be further improved.
[0041]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIGS. 1 and 2 show a droplet discharge device 10 constituting a surface treatment device for an optical member according to an embodiment of the present invention. The droplet discharge device 10 is a device for discharging a liquid material as droplets onto the surface of an eyeglass lens 1 as an object to be discharged and applying the liquid material in a film form. The surface treatment device for the optical member includes, in addition to the droplet discharge device 10, an optical member transport device (not shown) and an optical member supply device to the droplet discharge device 10, and a liquid material coated in a film form on the surface of the optical member. And a heat treatment device for fixing to the substrate.
[0042]
As the liquid material, a hard coat liquid 2 for forming a surface cured film of the lens 1, a solution of a raw material for forming an antireflection film, a solution containing a dye or pigment for dyeing, or the like can be applied. Further, as an object to be ejected, a lens for spectacles as an optical element or a lens for another optical device can be applied. Here, a case will be described in which the hard coat liquid 2 is discharged as droplets 3 onto the spectacle lens 1 and applied in a film form.
[0043]
In FIG. 1, the droplet discharge device 10 includes a head unit 31 having an inkjet head 30, a head position control device 11, a lens position control device 12, a main scanning drive device 13, a sub-scanning drive device 14, It has an imaging device 40 and a control device 35.
Among these devices, a head position control device 11, a lens position control device 12, a main scanning drive device 13, a sub-scanning drive device 14, and an imaging device 40 are installed on the base 9. Each of these devices is covered by a cover 8 as necessary.
[0044]
The head unit 31 is supported by the head position control device 11, and a plurality of inkjet heads 30 are attached to the head unit 31.
The inkjet head 30 is held by a carriage as a holding unit (not shown) in the head unit 31. The carriage has holes slightly larger than the ink jet head 30, that is, a plurality of concave portions, at positions where the ink jet head 30 is to be held. Then, the inkjet head 30 is mounted and held in the concave portions of these carriages. Further, the inkjet head 30 is fixed by a combination of screws, adhesives, and other fastening means. When the position of the inkjet head 30 with respect to the carriage is accurately determined, the inkjet head 30 may be fixed by simply press-fitting without using any special fastening means.
[0045]
The inkjet head 30 has a nozzle row (not shown) formed by arranging a plurality of nozzles 32 in a row. The hole diameter of these nozzles 32 is, for example, 28 μm, the number of nozzles 32 per one nozzle row is, for example, 180, and the nozzle pitch between the nozzles 32 is, for example, 141 μm.
The ink jet head 30 has, as its internal structure, a stainless steel nozzle plate (not shown), a diaphragm facing the nozzle plate, a plurality of partition members for joining them, a plurality of ink chambers partitioned by the partition members, a liquid pool, and the like. Is provided. A piezoelectric element (not shown) is attached to the diaphragm, and the diaphragm is vibrated at a predetermined frequency by controlling energization of the piezoelectric element. Then, a predetermined amount of droplets 3 are ejected from the nozzle 32 at intervals according to the vibration.
[0046]
The main scanning drive device 13 causes the inkjet head 30 to perform main scanning on the lens 1 by moving in parallel with respect to the lens 1 in the main scanning direction X. During this main scanning, the hard coat liquid 2 is selectively ejected from a plurality of nozzles 32 in each ink jet head 30 to apply the hard coat liquid 2 to a predetermined position of the lens 1 in a film form.
[0047]
Further, the lens 1 is translated by a predetermined distance in the sub-scanning direction Y by the sub-scanning driving device 14. By performing such parallel movement, the main scanning position of the inkjet head 30 can be shifted at a predetermined interval. Note that the parallel movement distance can be arbitrarily set to, for example, the length of the Y component of the nozzle row in the sub-scanning direction, or a length shorter or longer than that.
[0048]
In FIG. 2, a head position control device 11 is a device that controls the position of the inkjet head 30. The head position control device 11 has an α motor 15, a β motor 16, a γ motor 17, and a Z motor 18.
The α motor 15 rotates the inkjet head 30 around an axis parallel to the ejection direction. The β motor 16 swings and rotates the inkjet head 30 around an axis parallel to the sub-scanning direction Y. The γ motor 17 swings and rotates the inkjet head 30 about an axis parallel to the main scanning direction. The Z motor 18 moves the ink jet head 30 in the vertical direction.
The lens position control device 12 has a table 20 for fixing the jig 4 on which the lens 1 is mounted, and a θ motor 19 for rotating the table 20 in a plane as indicated by an arrow θ.
[0049]
The main scanning drive device 13 is a device as a moving unit that moves the inkjet head 30 with respect to the lens 1 in the main scanning direction. The main scanning drive device 13 has an X guide rail 21 extending in the main scanning direction X, and an X slider 22 including a pulse-driven linear motor. The X slider 22 translates in the main scanning direction along the X guide rail 21 when a built-in linear motor operates.
[0050]
The sub-scanning driving device 14 is a device as a moving unit that moves the lens 1 in the sub-scanning direction with respect to the inkjet head 30. The sub-scanning driving device 14 includes a Y guide rail 23 extending in the sub-scanning direction Y, and a Y slider 24 including a pulse-driven linear motor. The Y slider 24 moves in parallel in the sub-scanning direction Y along the Y guide rail 23 when a built-in linear motor operates.
[0051]
The linear motor pulse-driven in the X slider 22 and the Y slider 24 can precisely control the rotation angle of the output shaft by a pulse signal supplied to the motor. Therefore, the position of the inkjet head 30 supported by the X slider 22 in the main scanning direction X and the position of the table 20 in the sub scanning direction Y can be controlled with high precision. The position control of the ink jet head 30 and the table 20 is not limited to the position control using a pulse motor, but can also be realized by feedback control using a servo motor or any other control method.
[0052]
The imaging device 40 illustrated in FIG. 1 is located on a side of the table 20 that moves on a Y guide rail 23 extending in the sub-scanning direction Y. The imaging device 40 includes a lens imaging camera 41 that images the lens 1 installed on the table 20 from a side thereof. When the table 20 is set at a predetermined observation position by the sub-scanning driving device 14, the lens imaging camera 41 is configured such that the substantially same plane as the surface of the lens 1 and the optical axis 42 of the lens imaging camera 41 are substantially parallel. It is installed in.
[0053]
FIG. 3 is a partially sectional side view showing the lens imaging camera 41 and the lens 1. 3, the lens imaging camera 41 includes an observation lens 43 as an optical system, and a charge-coupled device 44 (Charge-Coupled Device, CCD) at a position where an image is formed by the observation lens 43. The outer shell 1B of the lens 1 is imaged by the lens imaging camera 41.
[0054]
The lens 1 is mounted on a jig 4 having four mounting claws 4A corresponding to the diameter of the lens 1 with the surface to be discharged 1A facing upward in FIG. The lens 1 is provided with a marking 1C as a position recognition means at a predetermined position on a side surface thereof. In addition, the θ motor 19 shown in FIG. 2 rotates the table 20 in the plane as indicated by the arrow θ in order to image the lens 1 from an arbitrary direction. Here, the arbitrary direction for imaging the lens 1 may be one direction positioned by the marking 1C, or the table 20 may be rotated in the plane of the table 20 in the direction of the arrow θ at every predetermined angle (for example, 10 °). In a plurality of directions.
[0055]
Note that the imaging device 40 is not limited to the one including the lens imaging camera 41 including the charge-coupled device 44. For example, a reflection sensor using a laser beam, a sound wave, a light wave, infrared light, or the like, a transmission sensor, or the like can be applied in place of the lens imaging camera 41. In addition, even for a camera, a film-type camera without the charge-coupled device 44 or any other camera can be used.
[0056]
The control device 35 illustrated in FIG. 1 is a device as a control unit that controls the overall control of the droplet discharge device 10. The control device 35 has a computer main unit 36 containing a processor, a keyboard as an input device 37, and a CRT (Cathode-Ray Tube) display 38 as a display device. As shown in FIG. 4, the processor includes a CPU (Central Processing Unit) 51 for performing arithmetic processing, and a memory 52 for storing various information, that is, an information storage medium.
[0057]
Each device of the head position control device 11, the lens position control device 12, the main scanning drive device 13, the sub-scanning drive device 14, and the head drive circuit 33 for driving the piezoelectric element in the inkjet head 30 shown in FIG. 4, it is connected to the CPU 51 via the input / output interface 53 and the bus 54. The input device 37, the CRT display 38, and the lens imaging camera 41 are also connected to the CPU 51 via the input / output interface 53 and the bus 54.
[0058]
The memory 52 as an information storage medium is a concept including a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory) and an external storage device such as a hard disk, a CD-ROM reader, and a disk storage medium. is there. In FIG. 4, a storage area for storing program software, ejection position data, sub-scanning amount data, ejection amount data, lens characteristic data, coating pattern data, and the like is set in the memory 52. An area functioning as a work area or a temporary file for the CPU 51 and other various storage areas are also set in the memory 52.
[0059]
The storage area of the program software stores the program software in which the control procedure of the operation of the droplet discharge device 10 is described. The ejection position is stored as coordinate data in the ejection amount data storage area, and the sub scanning movement amount of the lens 1 in the sub scanning direction Y is stored in the sub scanning amount data storage area. Further, in the storage area of the lens characteristic data, characteristic values of the lens 1 that cannot be recognized by the imaging device 40, such as the focal position of the discharge surface 1A of the lens 1 and a cutout range (indicated by 1D in FIG. 6B). Stored as data.
[0060]
The CPU 51 controls the lens imaging camera 41 in accordance with program software stored in a memory 52 as an information storage medium, performs image processing based on the captured image of the lens 1, and performs a gap between the lens 1 and the inkjet head 30. L1 and the ejection pattern are determined. The CPU 51 performs control for discharging the hard coat liquid 2 according to the determined gap L1 and the determined discharge pattern. Further, the CPU 51 includes, as a specific function realizing unit, an image processing operation unit that performs operations for image recognition and determination of a gap L1, an ejection pattern, and the like from an image of the lens 1 captured by the lens imaging camera 41; A coating operation unit for performing an operation for applying the hard coat liquid 2 into a film by discharging.
[0061]
In FIG. 4, if the image processing operation unit is divided in detail, it has various function operation units such as an observation control operation unit, an imaging control operation unit, an image recognition operation unit, and an image pattern development operation unit.
The observation control calculation unit performs calculation for setting the table 20 to the observation position, and the imaging control calculation unit calculates control for imaging the lens 1 with the lens imaging camera 41. Then, the image recognition calculation unit performs a calculation of image recognition from the captured image of the lens 1, and the image pattern development calculation unit determines a gap L 1 between the lens 1 and the inkjet head 30 based on the recognized image. An operation for determining an ejection pattern or the like is performed.
[0062]
If the coating operation unit is divided in detail, there are various function operation units such as a coating start position operation unit, a main scanning control operation unit, a sub-scanning control operation unit, and a nozzle discharge control operation unit.
The application start position calculation unit performs an operation for setting the inkjet head 30 to an initial position for application. The main scanning control calculation unit calculates control for moving the inkjet head 30 in the main scanning direction X at a predetermined speed, and the sub-scanning control calculation unit calculates the lens 1 in the sub-scanning direction Y by a predetermined sub-scanning amount. The control for shifting only is calculated. Then, the nozzle discharge control calculation unit performs a calculation for controlling which of the plurality of nozzles 32 in the inkjet head 30 is activated to discharge the hard coat liquid 2.
[0063]
In the present embodiment, each of the above functions is realized by software using the CPU 51. However, when each of the above functions can be realized by a single electronic circuit without using the CPU 51, such a function is realized. It is also possible to use electronic circuits.
[0064]
Hereinafter, the operation of the droplet discharge device 10 having the above configuration will be described with reference to the flowchart shown in FIG.
In FIG. 5, the operation of the droplet discharge device 10 mainly includes two steps of an image processing step and a coating step.
[0065]
When the droplet discharge device 10 is operated by turning on the power by an operator, first, in step S1, initialization is realized. Specifically, the head unit 31 and the control device 35 are set to a predetermined initial state.
In step S2, the lens 1 is set on the jig 4 on the table 20 by a lens supply device (not shown).
[0066]
Next, as an image processing step, the table 20 on which the lens 1 is set is moved to an observation position immediately below the lens imaging camera 41 (step S3). The lens 1 is imaged while controlling the lens imaging camera 41 and the θ motor 19, and the position of the marking 1C is recognized. By rotating the output shaft of the θ motor 19 in FIG. 2 in minute angle units based on the position of the marking 1C, the table 20 is rotated in-plane in minute angle units to position the lens 1 (step S4). The lens 1 is imaged again by the lens imaging camera 41, and the outer shell 1B of the lens 1 is image-recognized by calculation from the imaging data of the lens 1 captured by the charge-coupled device 44 of the lens imaging camera 41 (step S5). At this time, the outer periphery 1B of the lens 1 can be recognized three-dimensionally by rotating the θ motor 19 for each predetermined angle and imaging the lens 1 with the lens imaging camera 41 from a plurality of directions.
[0067]
In step S6, an image pattern is developed by calculation based on the image of the lens 1 recognized in step S5. Specifically, as shown in a side view schematically showing an image of the lens 1 shown in FIG. 6A, the dimensions H1 and H2 of the lens 1 in the height direction, that is, the position of the discharge target surface 1A, The surface shape of the surface to be ejected 1A of the lens 1 is recognized. Next, based on the recognized shape of the lens 1 or the lens characteristic data input in advance, the application range in which the hard coat liquid 2 is discharged and applied in a film form is determined (step S7). At this time, by inputting a range 1D cut out as a pair of eyeglass lenses indicated by a two-dot chain line in FIG. 6B as lens characteristic data, the range 1D can be set as an application range.
[0068]
In step S8, the hard coat liquid 2 is discharged during the main scanning in the main scanning direction X of the inkjet head 30 in the plan view schematically showing the scanning of the inkjet head 30 shown in FIG. The application pattern to be applied in a shape is determined. The application pattern includes the following three types of operations of the inkjet head 30, and the application pattern can be selected as appropriate.
[0069]
FIG. 7 is a cross-sectional view schematically showing the first application pattern. In FIG. 7, the inkjet head 30 performs a main scanning operation along the surface shape of the target surface 1A. That is, the surface 1A to be ejected and the surface of the inkjet head 30 on which the plurality of nozzles 32 are provided face each other with a certain gap L1 therebetween. Further, the inkjet head 30 performs a main scanning operation with the ejection direction of the droplet 3 of the hard coat liquid 2 substantially orthogonal to the ejection surface 1A of the lens 1. The gap L1 between the inkjet head 30 and the surface to be ejected 1A is desirably 0.2 mm to 0.3 mm, but if it is within a range of up to about 15 mm, the ejected droplets 3 are applied in a film form. There is no problem in doing. However, when the distance between the inkjet head 30 and the surface to be ejected 1A increases, the amount of the ejected droplets 3 scattered outside the surface to be ejected 1A increases, and the ejection amount substantially decreases. The inconvenience that it occurs.
[0070]
Next, FIG. 8 is a cross-sectional view schematically showing the second application pattern. In FIG. 8, the inkjet head 30 performs a main scanning operation on a substantially flat surface facing the surface to be ejected 1A. That is, the gaps L <b> 1 and L <b> 2 differ between the surface to be ejected 1 </ b> A and the surface of the inkjet head 30 on which the nozzles 32 are provided, depending on the position of the lens 1. Further, the inkjet head 30 performs the main scanning operation in a state where the ejection direction of the droplet 3 of the hard coat liquid 2 is directed downward in FIG.
[0071]
FIG. 9 is a sectional view schematically showing a third coating pattern. In FIG. 9, the inkjet head 30 performs a main scanning operation along the surface shape of the surface to be ejected 1A. However, unlike the first application pattern described above, the inkjet head 30 performs the main scanning operation with the ejection direction of the droplet 3 of the hard coat liquid 2 directed downward in FIG.
[0072]
After the application pattern is determined as described above and the image processing step is completed, the application step is performed. In step S9 in FIG. 5, the position where the application is started by the inkjet head 30 is determined by calculation. Then, the main scanning driving device 13 and the sub-scanning driving device 14 are appropriately operated to move the ink jet head 30 to the application start position A shown in FIG. 6B (step S10).
[0073]
When the inkjet head 30 is placed at the application start position A in step S10, the main scanning for one line B in the main scanning direction X is started in step S11. More specifically, the main scanning drive device 13 shown in FIG. 2 operates to linearly scan and move the inkjet head 30 in the main scanning direction X at a constant speed. During the movement, when the corresponding nozzle 32 reaches the application range of the lens 1 to which the hard coat liquid 2 is to be applied, the hard coat liquid 2 is discharged from the nozzle 32. That is, the energization to the piezoelectric element (not shown) attached to the vibration plate (not shown) in the ink jet head 30 is controlled by the head drive circuit 33, so that the hard coat is applied to the set application range. The liquid 2 is discharged.
[0074]
The discharge amount of the hard coat liquid 2 discharged from the inkjet head 30 in the main scanning is controlled differently depending on the above-mentioned application pattern. That is, in the first application pattern of FIG. 7, the ejection amount of the ejected hard coat liquid 2 is controlled so as to be constant during the main scanning. In the second and third application patterns shown in FIGS. 8 and 9, the ejection amount of the hard coat liquid 2 to be ejected is controlled depending on the position of the lens 1. Specifically, the ejection amount is controlled to be large in the vicinity of the outer periphery of the lens 1 where the surface of the inkjet head 30 on which the plurality of nozzles 32 are provided and the ejection target surface 1A face each other with a large angle. ing. Further, as shown in FIG. 8, when the surface of the inkjet head 30 on which the plurality of nozzles 32 are provided and the surface to be ejected 1A are separated (gap L2), the amount of the hard coat liquid 2 scattered is small. Therefore, the discharge amount is controlled so as to increase.
[0075]
When the main scanning for one line B is completed in step S12 of FIG. 5 (YES in step S12), the inkjet head 30 reverses and returns to the initial application start position A (step S13). Then, the lens 1 set on the table 20 is driven by the sub-scanning driving device 14 and moves by a predetermined sub-scanning amount in the sub-scanning direction Y, and the inkjet head 30 moves to the second application start position A ′. It is placed (step S14). Next, the main scanning and the ejection of the hard coat liquid 2 are repeatedly performed, and the application of the hard coat liquid 2 to the entire application area of the lens 1 is completed (step S15).
[0076]
When the application operation of the hard coat liquid 2 by the inkjet head 30 is completed by the above-described application process (YES in step S15), the lens 1 is discharged to the outside in step S16 by a lens supply device (not shown). Is done. Thereafter, the process returns to step S2 and the operation of applying the hard coat liquid 2 to another lens 1 is repeated unless an instruction to end the process is given by the operator.
When the operator gives an instruction to end the work (YES in step S17), the application work is ended.
[0077]
Thus, the application of the hard coat liquid 2 to one surface of the lens 1 is completed. Thereafter, if necessary, the hard coat liquid 2 is applied to the opposite surface of the lens in the same procedure. An optical member having a film formed on the surface of the lens 1 by curing the hard coat liquid 2 by subjecting the lens 1 on which the hard coat liquid 2 is applied in a film form to heat treatment, specifically, Completes a hard coat lens for eyeglasses.
[0078]
According to the embodiment of the present invention, the following effects can be obtained.
(1) The outer shell 1B of the lens 1 is recognized by the imaging device 40, and the hard coat liquid 2 is ejected from the inkjet head 30 based on the outer shell 1B. , The usage efficiency of the hard coat liquid 2 is sufficiently increased, and the liquid material can be uniformly discharged onto the discharge target surface 1A.
[0079]
(2) By performing image processing based on the image of the lens 1 and recognizing the image of the position and surface shape of each lens 1 which is different from each other, an appropriate gap L1 between the surface to be ejected 1A and the inkjet head 30 for each lens 1 Can be determined appropriately.
[0080]
(3) By performing image processing based on the image of the lens 1 and recognizing the image of the position and surface shape of each different lens 1, it is possible to select an appropriate coating pattern according to the surface shape of each lens 1. Thus, the accuracy of the surface treatment of the lens 1 can be improved.
[0081]
(4) By performing image processing based on the image of the lens 1 and recognizing the position and surface shape of the lens 1 as an image, it is not necessary to manage the shape data and the like of the lens 1 which are individually different as a database, The efficiency of the surface treatment can be improved.
[0082]
(5) According to the first coating pattern, the ejection amount of the hard coat liquid 2 is controlled by controlling the inkjet head 30 to move along the ejection target surface 1A according to the surface shape of the lens 1. And the liquid material can be uniformly discharged onto the discharge target surface 1A.
[0083]
(6) According to the second coating pattern, by controlling the ejection amount of the hard coat liquid 2 according to the angle at which the inkjet head 30 and the ejection target surface 1A face each other according to the surface shape of the lens 1, The movement of the inkjet head 30 can be easily controlled, and the liquid can be uniformly discharged onto the discharge target surface 1A.
[0084]
(7) By controlling the discharge amount of the hard coat liquid 2 according to the distance between the inkjet head 30 and the discharge surface 1A, the surface treatment accuracy of the lens 1 is further improved, and coating with a uniform film thickness is performed. be able to.
[0085]
(8) By marking 1C on the lens 1, it is possible to recognize the upper, lower, left, and right positions and directions when the lens 1 is used as a spectacle lens, and to more accurately determine an application range and an application pattern. The hard coat liquid 2 can be efficiently discharged onto the surface of the substrate 1.
[0086]
(9) The shape of the lens 1 is imaged as an image by the lens imaging camera 41, and is immediately transmitted as an electric signal from the charge-coupled device 44 to the image processing operation unit of the CPU 51, so that the image processing process based on the image of the lens 1 can be performed quickly. Can be performed.
[0087]
(10) In the memory 52, characteristic data such as the focal position and outer diameter of the lens 1 and the cut-out range for glasses are stored, and based on the characteristic data, the ejection amount and the application range of the hard coat liquid 2 are controlled. Thereby, an appropriate amount of the hard coat liquid 2 can be applied to each lens 1, and the surface treatment accuracy of the lens 1 can be improved.
[0088]
Although the best configuration and method for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this.
That is, the present invention has been particularly shown and described with particular reference to particular embodiments, but without departing from the spirit and scope of the present invention with respect to the embodiments described above. Those skilled in the art can make various modifications in the shape, material, quantity, and other detailed configurations.
[0089]
In the above-described embodiment, the surface treatment of the lens 1 has been described as an object to be ejected. However, the invention is not limited thereto. Any object can be applied as long as it can discharge a liquid material.
In the above-described embodiment, the droplet discharge device 10 performs the surface treatment on the lenses 1 one by one. However, the present invention is not limited to this, and the droplet discharge device 10 may simultaneously process a plurality of lenses. Different discharge ranges and discharge amounts can be set for each of the lenses.
[0090]
In the above-described embodiment, the droplet discharge device 10 is configured to include the imaging device 40. However, the present invention is not limited to this, and the lens recognition device can be a separate device. By providing a transport device between the device and the droplet discharge device, the image processing step and the coating step can be performed continuously.
[0091]
In the above-described embodiment, the imaging device 40 includes the lens imaging camera 41 including the charge-coupled device 44. However, the configuration is not limited thereto. What can be recognized may be provided.
Further, after the coating on one side of the lens 1 is completed, the droplet discharge device 10 turns over the lens 1 to reverse the lens, and continuously performs the image processing and the coating process on the opposite side. Means may be provided. Further, the coating process can be performed on both the front and back surfaces of the lens 1 simultaneously or at a predetermined time interval.
[0092]
Further, the ejection amount of the hard coat liquid 2 is controlled in accordance with the distance between the inkjet head 30 and the ejection target surface 1A, or the moving speed of the inkjet head 30 is controlled at a constant ejection amount, and the like. By controlling the discharge amount of the hard coat liquid 2 per unit area to be constant, the hard coat liquid 2 can be evenly and uniformly applied in a film form.
[0093]
Further, in the above-described embodiment, the scanning of the inkjet head 30 is performed after performing one line B of main scanning along the main scanning direction X, and then inverting to return to the initial position, and the table 20 is moved in the sub-scanning direction Y. It is assumed that the table 20 moves by a predetermined length and the inkjet head 30 performs main scanning again. However, the present invention is not limited to this. After performing one line of main scanning, the table 20 moves in the sub-scanning direction Y without inversion. Alternatively, the liquid material may be ejected while performing main scanning in the direction in which the inkjet head is reversed.
Further, the inkjet head 30 has the length of the nozzle row for one main scanning line B. However, the present invention is not limited to this, and the length of the lens is substantially equal to or longer than the length of the lens in the sub-scanning direction Y. May be provided with a nozzle row having a length dimension of, or a plurality of inkjet heads arranged in parallel in the sub-scanning direction Y.
[0094]
In the above-described embodiment, the inkjet head 30 performs the main scanning in the main scanning direction X. However, the present invention is not limited to this, and the table in which the inkjet head is fixed at a predetermined position and the lens is set is mainly used. During the scanning movement, the liquid material is ejected from the inkjet head during that time, and after one line of main scanning is performed, the inkjet head moves by a predetermined distance in the sub-scanning direction, and the table moves again by the main scanning. You may.
[0095]
【The invention's effect】
As described above, according to the method and apparatus for discharging a liquid material of the present invention, by controlling the discharge based on the outline of the object, the liquid material can be uniformly applied to the surface of the object. This has the effect of being able to discharge. Further, according to the method for manufacturing an optical member of the present invention, even when the outer shape and the surface curvature are different for each optical element, the liquid material can be uniformly discharged onto the surface of the optical member.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a droplet discharge device which is a main part of a surface treatment device for an optical member according to the present invention.
FIG. 2 is an enlarged perspective view showing a main part of the apparatus shown in FIG. 1;
FIG. 3 is a side view in which a part of a lens imaging camera and a lens is sectioned.
FIG. 4 is a block diagram showing a control system used in the apparatus of FIG.
FIG. 5 is a flowchart showing a control flow executed by the control system of FIG. 4;
FIGS. 6A and 6B are a side view and a plan view schematically showing image processing of a lens and scanning by an inkjet head. FIGS.
FIG. 7 is a cross-sectional view schematically showing a first application pattern.
FIG. 8 is a sectional view schematically showing a second application pattern.
FIG. 9 is a sectional view schematically showing a third coating pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens (optical element), 1A ... Discharge surface, 1B ... Outer surface, 1C ... Marking (position recognition means), 2 ... Hard coat liquid (liquid material), 10 ... Drop discharge device, 11 ... Head position control device (Control means), 12: lens position control apparatus (control means), 13: main scanning drive apparatus (moving means), 14: sub-scanning driving apparatus (moving means), 30: inkjet head (droplet discharge head), 32 ... Nozzle, 33 ... Head drive circuit (control means), 40 ... Imaging device.

Claims (26)

A droplet discharge head provided with a plurality of nozzles for discharging a liquid having fluidity to an object to be discharged,
Moving means for relatively moving at least one of the droplet discharge head and the discharge target;
A discharge unit that recognizes a contour of the object to be discharged and controls at least one of discharge of the droplet discharge head and movement by the moving unit based on the contour. apparatus. The discharge device according to claim 1,
The discharge device, wherein the control unit controls the amount of the liquid material discharged onto the discharge target per unit area to be constant. The discharge device according to claim 1 or 2,
The control unit controls at least one of the ejection of the droplet discharge head and the movement by the moving unit based on the distance between the droplet discharge head and the object to be ejected in the facing direction. A discharge device characterized by the above-mentioned. The discharge device according to any one of claims 1 to 3,
The discharge device, wherein the control means controls the movement of the moving means in a state where the distance between the droplet discharge head and the object to be discharged is constant in the facing direction. In the discharge device according to any one of claims 1 to 4,
The control means is configured to control a position of the surface to be discharged in a direction in which the liquid is discharged, and a position of the surface to be discharged as a predetermined surface of the object to be discharged from which the liquid is discharged from the droplet discharge head. A discharge device for recognizing at least one of surface shapes of surfaces. The discharge device according to any one of claims 1 to 5,
The discharge device according to claim 1, wherein the control unit recognizes at least one of the position and the surface shape of the discharge target surface based on image data obtained by capturing the discharge target. The discharge device according to claim 6,
The control unit is configured to perform image processing based on at least one of the position and the surface shape of the ejection target surface recognized by the imaging data, and to perform a gap between the ejection target surface and the droplet ejection head. And an image processing means for determining the image quality. The discharge device according to claim 6 or 7,
The control unit discharges the liquid material discharged from the droplet discharge head by image processing based on at least one of the position of the surface to be discharged and the surface shape recognized by the imaging data. A discharge device comprising an image processing means for determining an amount. The discharge device according to any one of claims 1 to 8,
The object to be ejected is an optical element,
A discharging apparatus, wherein the liquid material is discharged onto a predetermined surface of the optical element to form a film. Recognizing at least one of the position of the surface to be ejected as a predetermined surface of the object to be ejected from which the liquid material having fluidity is ejected and the surface shape of the surface to be ejected,
Based on at least one of the position of the surface to be ejected and the surface shape, a droplet ejection head provided with a plurality of nozzles for ejecting the liquid material is provided with a predetermined gap from the surface to be ejected. In a state where the object to be discharged is opposed to the object to be ejected,
A method for discharging a liquid material, comprising: discharging the liquid material from each nozzle of the plurality of droplet discharge heads to a predetermined range of the surface to be discharged. The method for discharging a liquid material according to claim 10,
A method for discharging a liquid material, comprising: discharging the liquid material while maintaining a constant amount per unit area of the liquid material discharged to the object to be discharged. In the method for discharging a liquid material according to claim 10 or 11,
At least one of ejection of the liquid from the droplet ejection head and movement of the droplet ejection head is performed based on the magnitude of the distance between the droplet ejection head and the surface to be ejected in the facing direction. Discharging the liquid material under control. The method for discharging a liquid material according to any one of claims 10 to 12,
A method for discharging a liquid material, comprising: controlling a movement of the liquid droplet discharge head to discharge the liquid material in a state where a distance between the liquid droplet discharge head and the surface to be discharged in the facing direction is constant. . In the method for discharging a liquid material according to any one of claims 10 to 13,
Imaging the object to be ejected,
A method for discharging a liquid material, comprising recognizing at least one of the position of the surface to be discharged and the surface shape based on the image data. The method for discharging a liquid material according to claim 14,
Determining a gap between the droplet discharge head and the discharge surface by image processing based on at least one of the position and the surface shape of the discharge surface recognized by the imaging data. A method for discharging a liquid material. In the method for discharging a liquid material according to claim 14 or 15,
Determining a discharge amount of the liquid material discharged from the droplet discharge head by image processing based on at least one of the position of the discharge target surface and the surface shape recognized by the imaging data. A method for discharging a liquid material. The method for discharging a liquid material according to any one of claims 10 to 16,
The object to be ejected is an optical element,
A method for discharging a liquid material, comprising forming a film by discharging the liquid material on a predetermined surface of the optical element. An optical element having an optical element, by discharging a liquid having fluidity on the surface of the optical element, a method for manufacturing an optical member having a film formed,
Recognizing at least one of the position of the surface to be ejected as the predetermined surface of the optical element that ejects the liquid material and the surface shape of the surface to be ejected,
Based on at least one of the position of the surface to be ejected and the surface shape, a droplet ejection head provided with a plurality of nozzles for ejecting the liquid material is provided with a predetermined gap from the surface to be ejected. In a state where the optical element is opposed to the optical element,
The method of manufacturing an optical member, wherein the liquid material is formed by discharging the liquid material from each nozzle of the plurality of droplet discharge heads to a predetermined range of the surface to be discharged. The method for manufacturing an optical member according to claim 18,
The method for manufacturing an optical member, wherein the liquid material is discharged while the amount of the liquid material discharged to the optical element per unit area is constant. In the method for manufacturing an optical member according to claim 18 or 19,
At least one of ejection of the liquid from the droplet ejection head and movement of the droplet ejection head is performed based on the magnitude of the distance between the droplet ejection head and the surface to be ejected in the facing direction. A method for manufacturing an optical member, wherein the liquid material is discharged under control. In the method for manufacturing an optical member according to any one of claims 18 to 20,
Manufacturing the optical member, wherein the liquid material is discharged by controlling the movement of the droplet discharge head in a state where the distance between the droplet discharge head and the surface to be discharged in the facing direction is constant. Method. The method for manufacturing an optical member according to any one of claims 18 to 21,
The method for manufacturing an optical member, wherein the optical element is a lens for spectacles. In the method for manufacturing an optical member according to claims 18 to 22,
The method for manufacturing an optical member, wherein the optical element includes a position recognition unit. The method for manufacturing an optical member according to any one of claims 18 to 23,
The optical element is imaged, and at least one of the position and the surface shape of the surface to be ejected is recognized based on the imaged data. The method for manufacturing an optical member according to claim 24,
A gap between the droplet discharge head and the discharge surface is determined by image processing based on at least one of the position and the surface shape of the discharge surface recognized by the imaging data. The manufacturing method of the optical member characterized by the above-mentioned. In the method for manufacturing an optical member according to claim 24 or claim 25,
Based on at least one of the position of the surface to be ejected and the surface shape recognized by the imaging data, the ejection amount of the liquid ejected from the droplet ejection head is determined by image processing. A method for manufacturing an optical member, comprising:

Images