Holding jig, coating method of optical element, manufacturing method of optical lens

Abstract

A holding clamp is provided that can hold optical elements of various shapes and sizes without deforming or damaging them. The holding clamp (1) for holding optical elements includes: a base (50); first, second, and third holding portions (12, 22, 32) for holding the periphery of a lens substrate L; a first arm (10) on which the first holding portion (12) is mounted and is rotatable about an axis; a torsion spring (60) that applies force to the first arm (10) in a first rotational direction such that the first holding portion (12) is directed toward the lens substrate L; and an arm fixing mechanism (40) configured to fix the rotation of the first arm (10).

Description

Technical Field

[0001] This invention relates to a holding fixture, a coating method for optical elements, and a manufacturing method for optical lenses. Background Technology

[0002] A widely used method for forming hard coatings or antireflective films on a lens substrate is to immerse the lens substrate in a coating solution for film formation and then dry the coating solution applied to the surface of the lens substrate. In this method, the lens substrate is immersed in the coating solution while its outer edge is held in place by a lens holding tool. After the lens substrate is removed from the coating solution, it is subjected to heat treatment while still held in place by the lens holding tool, followed by drying of the coating solution or annealing of the coating.

[0003] As a lens holding tool for holding a lens substrate, for example, Patent Document 1 discloses a lens holding unit comprising: a lower holding member that contacts the outer periphery of the lens substrate from below; a lateral rotating holding member configured to rotate so as to contact the outer periphery of the lens substrate from a horizontal direction; and a lateral fixed holding member that contacts the outer periphery of the lens substrate from the other horizontal direction. Furthermore, in the lens holding unit described in Patent Document 1, a leaf spring presses the lateral rotating holding member toward the lens substrate. Therefore, even when holding lens substrates of different sizes and shapes using a lens holding tool, the lateral rotating holding member can still contact the outer periphery of the lens substrate.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2012-242832 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] Here, in the structure described in reference 1, where a spring such as a leaf spring applies force to the rotating retaining member, it has the advantage of being able to retain lens substrates of different sizes and shapes without changing the lens retaining tool each time. However, the pressing force applied to the outer periphery of the lens substrate varies depending on its size and shape. Therefore, in order to stably retain lens substrates of any size and shape, a pressing force of about 5N is applied to the outer periphery of the lens, depending on the situation. This is because, when retaining a lens substrate with a large diameter, the leaf spring further contracts, thus increasing the force applied to the lens substrate from the side by the rotating retaining member.

[0009] On the other hand, holding the lens substrate in a holding tool after impregnation coating and then performing heat treatment, curing the coating agent, or annealing the coating film is beneficial to production efficiency. Therefore, if heat treatment is performed while holding a large-diameter, thin-thick lens substrate in a lens holding tool, deformation and damage will occur on the lens substrate.

[0010] The present invention was made in view of the above-mentioned problems, and its object is to provide a holding clamp that can hold optical elements of various shapes and sizes without causing deformation or damage to the optical elements.

[0011] Technical solutions for solving technical problems

[0012] The holding clamp of the present invention is a holding clamp for holding optical elements, characterized in that it comprises:

[0013] Base;

[0014] At least three retaining parts are provided to retain the periphery of the optical element;

[0015] The first arm has a first retaining part among at least three retaining parts installed thereon, and is disposed at the base in a manner that allows it to rotate about an axis;

[0016] The force-applying component applies force to the first arm in a first rotational direction such that the first holding portion is oriented toward the optical element;

[0017] The fixing mechanism is configured to fix the rotation of the first arm.

[0018] Furthermore, the holding clamp of the present invention is a holding clamp for holding optical elements, characterized in that it comprises:

[0019] At least three holding parts, each holding the periphery of a circular or elliptical optical element;

[0020] A force-applying component that applies force to the end of an optical element in a held state, in the first of at least three holding portions;

[0021] The fixing mechanism fixes the first holding part in a position that abuts against the end of the optical element in the held state, and substantially eliminates the force exerted by the force-applying component.

[0022] The film-forming method for the optical element of the present invention comprises the following steps: (1) A method for forming a film on the surface of the optical element using the aforementioned holding fixture.

[0023] The optical element is positioned such that it is surrounded by at least three retaining parts while the first arm of the retaining clamp is expanded by applying force;

[0024] Release the force applied to the first arm, and use the force-applying component to make the first holding part abut against the periphery of the optical element;

[0025] The first arm is secured by a fixing mechanism;

[0026] The optical element held by the retaining clamp is immersed in the coating liquid;

[0027] The optical element is lifted from the coating solution;

[0028] The coating liquid applied to the optical element is heated and cured.

[0029] Furthermore, the film-forming method for the optical element of the present invention is a method of forming a film on the surface of a circular or elliptical optical element, characterized in that...

[0030] A holding clamp is used, having at least three holding parts that hold the periphery of the optical element and a force-applying member that applies force to the first of the at least three holding parts toward the end of the optical element in the held state.

[0031] It includes the following steps:

[0032] The three holding parts are respectively made to abut against the periphery of the optical element to hold the optical element;

[0033] The first holding part is fixed while it is in contact with the end of the optical element, thereby substantially eliminating the force exerted by the force-applying component;

[0034] The optical element held by the retaining clamp is immersed in the coating liquid;

[0035] Lift the optical element from the coating solution;

[0036] The coating liquid applied to the optical element is heated and cured.

[0037] The method for manufacturing an optical lens of the present invention includes a step of forming a film on a lens substrate using the film-forming method of the above-described optical element.

[0038] Beneficial effects

[0039] According to the present invention, a holding clamp is provided that can hold optical elements of various shapes and sizes without causing deformation or damage to the optical elements. Attached Figure Description

[0040] Figure 1 This is a front view showing a lens holding clamp according to one embodiment of the present invention.

[0041] Figure 2 This is a rear view showing a lens holding clamp according to one embodiment of the present invention.

[0042] Figure 3 This is a side view showing a lens holding clamp according to one embodiment of the present invention.

[0043] Figure 4 yes Figure 1 An exploded side view of the arm fixing mechanism of the lens holding clamp shown.

[0044] Figure 5 This is a front view showing the state in which the lens substrate is held by a holding clamp according to one embodiment of the present invention.

[0045] Figure 6 This is a flowchart illustrating a method for manufacturing an optical lens according to one embodiment of the present invention. Detailed Implementation

[0046] Hereinafter, a lens holding clamp according to one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0047] The lens holding clamp 1 of this embodiment, as described below, is used to hold optical elements when the optical element is immersed in a processing liquid and a functional film is formed on the surface of the optical element by a coating process. Examples of optical elements include lens substrates used in eyeglass lenses.

[0048] Figures 1 to 3 This describes a lens holding clamp according to one embodiment of the present invention. Figure 1 It is a front view. Figure 2 This is the rear view. Figure 3 It's a side view. And, Figure 4 yes Figure 1 An exploded side view of the lens holding clamp's fixing mechanism (hereinafter also referred to as the arm fixing mechanism). Figures 1 to 4 As shown, the lens holding clamp 1 of this embodiment includes a base 50, a first arm 10, a second arm 20, a third arm 30, an arm fixing mechanism 40, a suspension member 70, a torsion spring 60, and a spring fixing mechanism 80. Unless otherwise specified, the components constituting the lens holding clamp 1 are made of heat-resistant metals such as stainless steel.

[0049] The base 50 is composed of a plate-shaped component that is perpendicular to the horizontal plane when suspended (extending parallel to the paper surface) and is roughly rectangular when viewed from the front.

[0050] A through hole 52 is formed in the base 50, connecting the interior and exterior surfaces. Figure 4And an arc-shaped hole 54 extending in an arc shape centered on the through hole 52. The through hole 52 is circular, with a diameter through which the threaded portion 42A of the wing bolt 42 of the arm fixing mechanism 40 can be inserted. The arc-shaped hole 54 is relative to the through hole 52 in the direction of extension of the first arm 10 ( Figure 1 The right side of the middle is located diagonally above the opposite side within a specified angle range.

[0051] A suspension member 70 is connected to the upper part of the base 50. The suspension member 70 is composed of a rod-shaped member bent into a generally V-shape. The suspension member 70 includes: a lateral portion 70A, one end of which is mounted to the base 50 and extends laterally; and an inclined portion 70B, which is bent into a V-shape relative to the lateral portion 70A and extends obliquely upward toward the base 50. An annular portion 70C is formed on the base end side of the lateral portion 70A, and this annular portion is welded to one side of the base 50. A mounting portion 70D, which is formed in a circular shape, is formed at the end of the inclined portion 70B. When the lens substrate is immersed in the coating liquid, the lens holding clamp 1 is used in a suspended state by mounting the mounting portion 70D to a device that can be driven up and down.

[0052] The first arm 10 has a base end portion 10A extending laterally and a front end portion 10B extending obliquely downward from the front end of the base end portion 10A. The base end portion 10A is flat in the up-down and left-right directions (with...). Figure 1 It is composed of a sheet material with the paper surface parallel to the surface, and a circular through hole 10C is formed at the end on the base 50 side. Figure 4 The diameter of the through hole 10C is sufficient for the threaded portion 42A of the wing bolt 42 to pass through. The front end portion 10B is composed of a straight rod-shaped component, with its base end connected to the front end of the base end portion 10A. A first holding portion 12 for holding the lens substrate is provided at the front end of the front end portion 10B. The first holding portion 12 is mounted such that the base end portion 12A is along the surface of the front end portion 10B of the first arm 10, and the front end portion 12B is bent toward the lens substrate side relative to the base end portion 12A. The edge of the front end portion 12B that abuts against the lens substrate is formed into a V-shaped concave shape.

[0053] The second arm 20 is a rod-shaped component, having a base end portion 20A mounted to the base 50 and a front end portion 20B extending downward from the base end portion 20A. The second arm 20 is mounted to the base 50 by welding the upper end portion of the base end portion 20A to it. The front end portion 20B is inclined relative to the base end portion 20A towards the lens substrate side. A second holding portion 22 for holding the lens substrate is provided at the front end of the front end portion 20B. The second holding portion 22 is mounted such that the base end portion 22A runs along the surface of the front end portion 20B of the second arm 20, and the front end portion 22B is bent relative to the base end portion 22A towards the lens substrate side. Figure 3As shown, the edge of the front end of the front end 22B that abuts against the lens substrate is formed into a V-shaped concave shape.

[0054] The third arm 30 is a rod-shaped component comprising: a base end portion 30A, which is mounted to the base 50 and extends downward; a middle portion 30B, which extends obliquely downward from the base end portion 30A toward the first arm 10; and a front end portion 30C, which extends laterally from the middle portion 30B. The third arm 30 is mounted to the base 50 by welding to the upper end portion of the base end portion 30A. A third holding portion 32 for holding the lens substrate is provided at the front end of the base end portion 30A. The third holding portion 32 is mounted approximately at a right angle to the surface of the base end portion 30A. The edge of the front end of the third holding portion 32 that abuts against the lens substrate is formed into a V-shaped concave shape.

[0055] It should be noted that in this embodiment, the base end portion 20A of the second arm 20 and the base end portion 30A of the third arm 30 are connected via the bending portion 24, but it is not limited to this, and the second arm 20 and the third arm 30 may also be formed separately.

[0056] like Figure 4 As shown, the arm fixing mechanism 40 includes: a wing bolt 42 as a screw component; a shaft component 44; and a pair of nuts 46A and 46B. The wing bolt 42 includes a cylindrical thread portion 42A with a thread formed on its outer peripheral surface, and a pair of operating blades 42B connected to the thread portion 42A.

[0057] The shaft component 44 is made of a cylindrical resin component such as plastic. Preferably, the material used to construct the shaft component 44 is one that increases frictional resistance with the first arm 10 when pressed against it. A through hole 44A is formed in the shaft component 44. The outer diameter of the shaft component 44 is slightly smaller than the inner diameter of the torsion spring 60.

[0058] The arm fixing mechanism 40 is configured such that a threaded portion 42A is sequentially inserted from the surface side of the base 50 and passes through the through hole 52 of the base 50 of the wing bolt 42, the torsion spring 60, the through hole 44A of the shaft member 44, and the through hole 10C of the first arm 10. A pair of nuts 46A and 46B are then tightened from the back side at the front end of the threaded portion 42A. With this structure, even when the tightening of the wing bolt 42 is weak, the first arm 10 can rotate relative to the base 50 with the threaded portion 42A of the wing bolt 42 as the center. Furthermore, by tightening the wing bolt 42 relative to the pair of nuts 46A and 46B, the shaft member 44 is pressed against the surfaces of the base 50 and the first arm 10. Therefore, the frictional force between the first arm 10 and the shaft member 44 and between the base 50 and the shaft member 44 increases, restricting the rotation of the first arm 10 relative to the base 50 and fixing the first arm 10 relative to the base 50.

[0059] It should be noted that, in this embodiment, the thread formed in the threaded portion 42A of the wing bolt 42 is a right-hand thread. Therefore, the rotation direction for tightening the wing bolt 42 is the same as the rotation direction in which the first arm 10 is subjected to force by the torsion spring 60. Thus, even when the wing bolt 42 is tightened while the first retaining portion 12 is in contact with the side of the lens substrate L, it is possible to prevent the first arm 10 from rotating and causing the first retaining portion 12 to detach from the lens substrate L.

[0060] The spring retaining mechanism 80 includes a bolt 82 inserted into an arc-shaped hole 54 in the base 50 from the surface side and a nut 84 fastened to the bolt 82 from the back side. The spring retaining mechanism 80 fastens the nut 84 and bolt 82, thereby increasing the friction between the bolt 82, nut 84 and the base 50, thus fixing the position. Furthermore, by releasing the fastening of the nut 84 and bolt 82, it can be moved along the arc-shaped hole 54.

[0061] The torsion spring 60 includes: a helical portion 62 formed in a spiral shape; a first wrist portion 64 and a second wrist portion 66 extending from the end of the helical portion 62. The torsion spring 60 is mounted around a shaft member 44 by inserting a shaft member 44 into and passing through the inside of the helical portion 62. The front end of the first wrist portion 64 is bent away from the helical portion 62, and the front end of the second wrist portion 66 is bent away from the helical portion 62.

[0062] The front end of the first wrist 64 of the torsion spring 60 is hooked to the upper side of the spring fixing mechanism 80 in the arc hole 54, and the front end of the second wrist 66 is hooked to the upper edge of the first arm 10. The torsion spring 60 is installed with a pre-applied torsion between the first wrist 64 and the second wrist 66. As a result, the torsion spring 60 receives a reaction force from the spring fixing mechanism 80 and applies force to the first arm 10 by rotating the first retaining part 12 toward the second arm 20.

[0063] Figure 5 This is a front view showing the state in which a lens substrate is held by a holding clamp according to one embodiment of the present invention. To hold the lens substrate by the holding clamp, firstly, the first arm 10 is stretched laterally and rotated to move away from the second arm 20. Then, in this state, the lens substrate L is positioned between the first holding portion 12, the second holding portion 22, and the third holding portion 32, and the stretching of the first arm 10 is released.

[0064] Therefore, as Figure 5As shown, the first retaining part 12, the second retaining part 22, and the third retaining part 32 abut against the sides of the lens substrate L, holding the lens substrate L at three points. Next, the wing bolt 42 of the arm fixing mechanism 40 is tightened. Thus, with the first arm 10 fixed relative to the base 50, and the first retaining part 12, the second retaining part 22, and the third retaining part 32 abutting against the sides of the lens substrate L, and without substantially applying any force to the lens substrate L, the lens substrate L is held.

[0065] At this time, for the positions where the first holding part 12 and the second holding part 22 hold the lens substrate L, it is preferable that the distance in the height direction from the center of gravity of the lens substrate L is 0.3 times or less the diameter of the lens substrate L (or the major axis if the lens substrate L is elliptical). Furthermore, for the positions where the third holding part 32 holds the lens substrate L, it is preferable that the distance in the horizontal direction from the center of gravity of the lens substrate L is 0.15 times or less the diameter or major axis R of the lens substrate L in the horizontal direction. By positioning the lens substrate L as described above, the lens substrate L can be stably held. Additionally, when the lens substrate L is lifted from the coating liquid in the later process, uneven film thickness caused by the remaining coating liquid in the lens holding part crossing the optical surface of the lens substrate L due to gravity can be suppressed.

[0066] It should be noted that the force exerted by the torsion spring 60 on the first arm 10 can be adjusted by moving the position of the spring fixing mechanism 80 along the arc hole 54. That is, by releasing the tightening of the bolt 82 and nut 84, moving it downward along the arc hole 54, and then tightening the bolt 82 and nut 84 again, the force can be reduced. The position of the spring fixing mechanism 80 is preferably adjusted according to the size and shape of the lens substrate so that the force of the first retaining part 12 pressing on the lens substrate is about 0.1 to 1 N when installing the lens substrate. If the pressing force is too large, the installation of the lens substrate will require a large force; if it is too small, the stability of the installation operation will be reduced, both of which are detrimental to operability.

[0067] Furthermore, in Figure 5 The diagram illustrates the case where the lens substrate is circular, but it is not limited to this. Irregularly shaped lens substrates (such as elliptical or other shapes) can also be held by the holding clamp 1. When holding lens substrates that are not circular, they can be held vertically along the major axis direction (the direction of the lens's maximum size). Positively shaped lenses with small edge thickness are prone to deformation and damage near the outer periphery of the held area, thus significantly improving the effectiveness of this invention.

[0068] The following describes the film-forming method for the lens substrate using the above-described retaining clamp and the manufacturing method for the spectacle lens.

[0069] The manufactured spectacle lenses can be various types, including single-focal lenses, multifocal lenses, and progressive lenses. The type of lens is determined by the surface shapes of the two sides of the lens substrate. Furthermore, the surface of the lens substrate can be convex, concave, or flat. In typical lens substrates and spectacle lenses, the object-side surface is convex, and the eye-side surface is concave. However, this is not a limitation.

[0070] As the lens substrate, a plastic lens substrate is preferred. Examples of resins used in the plastic lens substrate include, for example, styrene resins (represented by (meth)acrylic resins), polycarbonate resins, allyl resins, allyl carbonate resins such as diethylene glycol dielyl carbonate resin (CR-39), vinyl resins, polyester resins, polyether resins, polyurethane resins obtained by reacting isocyanate compounds with hydroxyl compounds such as diethylene glycol, thiourethane resins obtained by reacting isocyanate compounds with polythiol compounds, and cured products (commonly referred to as transparent resins) formed by curing a curable composition containing a (sulfur) epoxy compound having one or more disulfide bonds within its molecule.

[0071] Furthermore, it can be applied, for example, to lenses with a refractive index of approximately 1.48 to 1.75 on the lens substrate.

[0072] Figure 6 This is a flowchart illustrating a method for manufacturing an optical lens according to one embodiment of the present invention. Hereinafter, an example of forming a hard coating film relative to a lens substrate L will be described.

[0073] In the lens substrate, which becomes the material for optical lenses in eyeglasses, a shape corresponding to the user's prescription is pre-formed, and therefore the semi-finished lens is cut, ground, and cleaned. The lens substrate to which this invention is applied can also be a semi-finished lens. Alternatively, it can be a lens substrate with optical surfaces on the eyeball side and the object side formed based on the user's prescription.

[0074] First, such as Figure 6 As shown, the lens substrate L is mounted onto the retaining clamp (S20). The mounting of the lens substrate L onto the retaining clamp 1 is performed as described below.

[0075] First, the first arm 10 is stretched so that it rotates away from the second arm 20 and the third arm 30, thereby widening the distance between the first holding part 12 and the second holding part 22 and the third holding part 32 (S21).

[0076] Next, with the first arm 10 separated from the second arm 20 and the third arm 30 in this manner, the lens substrate L is arranged in a manner surrounded by the first holding portion 12, the second holding portion 22, and the third holding portion 32 (S22). It should be noted that when the first arm 10 is subjected to force toward the end of the held lens substrate L, in order to overcome this force and separate the first arm from the second and third arms, the first arm is stretched as described above.

[0077] Next, the tension on the first arm 10 is released. As a result, by the force of the torsion spring 60, the first arm 10 rotates toward the second arm 20 and the third arm 30, and the first holding part 12 presses against the lens substrate L. The first holding part 12, the second holding part 22 and the third holding part 32 abut against the periphery of the lens substrate L (S23).

[0078] Then, the wing bolt 42 of the arm fixing mechanism 40 is tightened relative to a pair of nuts 46A and 46B. Thus, the first arm 10 is fixed relative to the base 50 (S24). Through these steps S21 to S24, the lens substrate L can be held by the holding clamp 1. In this state, the lens substrate L is stably held with its optical surface extending substantially vertically, and there is substantially no force exerted on its periphery by the torsion spring 60. That is, the first holding part is fixed at the position where the end of the optical element abuts against the first to third holding parts in the held state, substantially eliminating the force that presses on the lens substrate L.

[0079] Next, a hard coating film is formed relative to the lens substrate (S30). The formation of the hard coating film relative to the lens substrate L is performed as follows.

[0080] First, the retaining clamp 1 is lowered, and the lens substrate L is immersed in a coating liquid mainly composed of an organosilicon compound that forms a hard coating film (S31).

[0081] Next, the holding clamp 1 is raised to lift the lens substrate L from the coating liquid (S32). By lifting the lens substrate L from the coating liquid in this way, the remaining coating liquid is removed from the optical surface of the lens substrate L due to gravity.

[0082] Next, the retaining clamp 1 is heat-treated at 80–120°C. By heat-treating the retaining clamp 1, the coating liquid applied to the surface of the lens substrate L is cured (S33). At this time, according to the retaining clamp 1 of this embodiment, since the external force (the force used to hold the lens) does not actually act on the lens substrate L, deformation and damage to the lens substrate L can be prevented.

[0083] Then, the processes of immersion in the coating liquid (S31), lifting from the coating liquid (S32), and heat curing (S33) are repeated until a hard coating film of a specified thickness is formed on the optical surface of the lens substrate L. By repeatedly performing these S31 to S33 steps, a hard coating film can be formed. It should be noted that in order to form a hard coating film of a specified thickness, S31 to S33 steps can be repeated as needed.

[0084] It should be noted that when forming the hard coating (S30) relative to the lens substrate, a primer layer can be formed on the surface of the lens substrate first. The primer layer is used to ensure the impact resistance of the lens substrate and to ensure the adhesion between the hard coating and the lens substrate. The primer layer only needs to be made of a material that does not affect the optical properties when the lens substrate is made of a material with a high refractive index. As a method for forming such a primer layer, it can be formed by applying it by dip coating, spin coating, spray coating, etc., and then curing it by heating or light irradiation.

[0085] Next, an anti-reflective film is formed on the surface of the hard coating (S40). The anti-reflective film can be formed, for example, by vacuum evaporation, dipping, spin coating, etc.

[0086] The above processes are used to manufacture eyeglass lenses.

[0087] According to this embodiment, the following effects can be achieved.

[0088] According to this embodiment, since a first retaining part 12 is mounted on the first arm 10, which is rotatably provided on the base, even lens substrates of different sizes and shapes can be held by rotating the first arm 10. Furthermore, after the lens substrate is positioned in a fixed position by the first to third retaining parts, the wing bolts 42 constituting the arm fixing mechanism 40 are tightened to the nuts 46A and 46B, thereby fixing the rotation of the first arm 10 and stably holding it without applying external force to the lens substrate L. Therefore, when heat treatment such as heating and curing of the coating material is performed on the lens substrate L, deformation and damage to the lens substrate L due to external force can be prevented.

[0089] Furthermore, according to this embodiment, the position of the spring fixing mechanism 80, which fixes the first arm 64 of the torsion spring 60, can move along the arc hole 54. Thus, even when holding lens substrates L of different sizes and shapes, by changing the position of the spring fixing mechanism 80, the force applied to the first arm from the torsion spring 60 can be adjusted to prevent deformation or damage to the lens substrate L.

[0090] Furthermore, according to this embodiment, the arm fixing mechanism 40 fixes the rotation of the first arm 10 by using nuts 46A and 46B to fasten the wing bolt 42 and clamping the wing bolt 42 and nuts 46A and 46B via the shaft member 44. Thus, the operator performing the film-forming process on the lens substrate L can easily fix and release the first arm without spending time.

[0091] Furthermore, in this embodiment, the rotation direction of the fastening wing bolt 42 is the same as the direction in which the force is applied to the first arm 10 by the torsion spring 60. Therefore, when fastening the wing bolt 42, it is possible to prevent the first arm 10 from rotating and the first retaining part 12 from leaving the side of the lens substrate L.

[0092] It should be noted that in this embodiment, the formation of a hard coating film on the surface of the lens substrate L is described, but it is not limited to this. Other possible formations include: a blue light filter film that reduces glare and improves visual clarity and contrast by filtering light in the blue region (wavelength region of 380–500 nm); an anti-reflective film containing, for example, silicon oxide, titanium dioxide, zirconium oxide, or tantalum oxide; or a hydrophobic film that improves hydrophobicity using an organosilicon compound containing fluorine atoms. Furthermore, the lens holding clamp 1 according to this embodiment can prevent deformation and damage to the lens substrate L during annealing.

[0093] Furthermore, while the above embodiment employs a structure in which the lens substrate L is held by the first holding part 12, the second holding part 22, and the third holding part 32, the lens can also be held by four or more holding parts. Additionally, in this embodiment, the second holding part 22 and the third holding part 32 are fixed, but they can also be movable.

[0094] Furthermore, in this embodiment, the second retaining portion 22 and the third retaining portion 32 are mounted on the second arm 20 and the third arm 30. This allows for flexible retention of the second retaining portion 22 and / or the third retaining portion 32, and reduces the force acting on the lens substrate L.

[0095] Furthermore, in this embodiment, a wing bolt 42 is used in the arm fixing mechanism 40, but it is not limited to this; a hand-tightening bolt or a handle bolt can also be used. A mechanism that allows the operator to easily and efficiently tighten or loosen the bolt without using additional tools is preferred.

[0096] Explanation of reference numerals in the attached figures

[0097] 1. Lens holding fixture;

[0098] 10. First Arm;

[0099] 10A base end;

[0100] 10B front end;

[0101] 10C through hole;

[0102] 12 First Holding Section;

[0103] 12A base end;

[0104] 12B front end;

[0105] 20 Second arm;

[0106] 20A base end;

[0107] 20B front end;

[0108] 22 Second retaining part;

[0109] 22A base end;

[0110] 22B front end;

[0111] 24. Bending section;

[0112] 30 Third arm;

[0113] 30A base end;

[0114] 30B middle section;

[0115] 30C front end;

[0116] 32. Third Maintenance Section;

[0117] 40-arm fixing mechanism;

[0118] 42 wing bolts;

[0119] 42A threaded section;

[0120] 42B operating blades;

[0121] 44-axis components;

[0122] 44A Through Hole;

[0123] 46A nuts;

[0124] 46B nuts;

[0125] 50 base;

[0126] 52 through holes;

[0127] 54 circular arc holes;

[0128] 60 torsion spring;

[0129] 62 spiral sections;

[0130] 64 First wrist;

[0131] 66. Second wrist;

[0132] 70 Suspension components;

[0133] 70A Lateral Section;

[0134] 70B Inclined Section;

[0135] 70C annular portion;

[0136] 70D Installation Section;

[0137] 80 spring fixing mechanism;

[0138] 82 bolts;

[0139] 84 nuts.

Claims

1. A holding clamp for holding optical elements, characterized in that, have: Base; At least three retaining parts are provided to retain the peripheral portion of the optical element; The first arm is provided with the first of the at least three retaining parts and is disposed on the base in a manner that allows it to rotate about an axis; A force-applying component applies force to the first arm in a first rotational direction such that the first holding portion is directed toward the optical element; A fixing mechanism is configured to fix the rotation of the first arm and substantially eliminate the force exerted by the force-applying component; In the at least three retaining parts, The first holding part and the second holding part hold the optical element at the following positions: at a distance from the center of gravity of the optical element in the height direction that is less than 0.3 times the diameter of the optical component or the major axis when the optical component is elliptical; The third holding part holds the optical element at a position where the horizontal distance from the center of gravity of the optical element is less than 0.15 times the diameter or major axis of the optical component.

2. The retaining clamp according to claim 1, The force-applying component is a torsion spring installed in such a way that it applies a force between the base and the first arm. The fixed position of the torsion spring in the base can be changed in the circumferential direction centered on the axis.

3. The retaining clamp according to claim 1, The fixing mechanism includes a threaded component and a nut that engages with the threaded component. The first arm is clamped by tightening the screw component and the nut, thereby fixing the rotation of the first arm.

4. The retaining clamp according to claim 3, The rotation direction used to fasten the screw component is the same as the first rotation direction.

5. The retaining clamp according to any one of claims 1 to 4, The retaining clamp has three retaining parts. The second and third retaining parts of the three retaining parts are respectively mounted on the second and third arms fixed to the base.

6. A holding clamp for holding optical elements, characterized in that, have: At least three holding parts, each holding the periphery of a circular or elliptical optical element; A force-applying component that applies force to the first of the at least three retaining portions toward the end of the optical element in the held state; A fixing mechanism that fixes the first holding part in a position abutting against the end of the optical element in the held state, and substantially eliminates the force exerted by the force-applying component; In the at least three retaining parts, The first holding part and the second holding part hold the optical element at the following positions: at a distance from the center of gravity of the optical element in the height direction that is less than 0.3 times the diameter of the optical component or the major axis when the optical component is elliptical; The third holding part holds the optical element at a position where the horizontal distance from the center of gravity of the optical element is less than 0.15 times the diameter or major axis of the optical component.

7. A method for forming a film on an optical element, wherein the film is formed on the surface of the optical element using the holding fixture according to any one of claims 1 to 6, characterized in that, Includes the following steps: The optical element is positioned such that it is surrounded by the at least three holding portions when the first arm of the holding clamp is expanded by applying force. The first and second holding portions hold the optical element at positions where the distance in the height direction from the center of gravity of the optical element is less than 0.3 times the diameter of the optical element or the major axis if the optical element is elliptical. The third holding portion holds the optical element at positions where the distance in the horizontal direction from the center of gravity of the optical element is less than 0.15 times the diameter or major axis of the optical element. Release the force applied to the first arm, and use the force-applying component to make the first holding part abut against the periphery of the optical element; The first arm is fixed by the fixing mechanism, thereby substantially eliminating the force exerted by the force-applying component; The optical element held by the retaining clamp is immersed in the coating liquid; The optical element is lifted from the coating liquid; The coating liquid applied to the optical element is heated and cured.

8. A method for forming a film on an optical element, wherein a film is formed on the surface of a circular or elliptical optical element, characterized in that, A holding clamp is used, having at least three holding parts that hold the periphery of the optical element and a force-applying member that applies force to the first of the at least three holding parts toward the end of the optical element in the held state. It includes the following steps: The three holding parts are respectively abutted against the periphery of the optical element to hold the optical element. The first holding part and the second holding part hold the optical element at the following positions: the distance in the height direction from the center of gravity of the optical element is less than 0.3 times the diameter of the optical element or the major axis in the case of the optical element being elliptical. The third holding part holds the optical element at the following position: the distance in the horizontal direction from the center of gravity of the optical element is less than 0.15 times the diameter or major axis of the optical element. The first holding part is fixed while it is in contact with the end of the optical element, thereby substantially eliminating the force exerted by the force-applying component; The optical element held by the retaining clamp is immersed in the coating liquid; The optical element is lifted from the coating liquid; The coating liquid applied to the optical element is heated and cured.

9. The film formation method for the optical element according to claim 8, During the holding step, the force is overcome so that the three holding parts come into contact with the periphery of the optical element.

10. A method for manufacturing an optical lens, comprising a step of forming a film on a lens substrate using the film-forming method of the optical element according to any one of claims 7 to 9.

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