JP2001264514A - Optical film forming device, method for forming lens and lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical film forming device imparting high freedom to the surface shape of the lens to be formed and not requiring a transferring surface to be formed in an aspherical shape and to provide a method for forming the lens and the lens. SOLUTION: The optical film forming device 1 forms an optical film by supporting a molding body 4 having a resin 20 on its surface 19 with a second rotary shaft 5, rotationally driving in this state a first rotary shaft 3 with a first driving means 8 and simultaneously rotationally driving the second rotary shaft 5 with a second driving means 9 and hardening the resin on the surface 19 of the molding body 4. The method for forming the lens and the lens are based on the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical film forming apparatus for forming an optical film on a blank lens or a mold using a resin such as a photocurable resin, and a lens for forming a lens using the optical film forming apparatus. The present invention relates to a forming method and a lens formed by the optical film forming apparatus or the lens forming method, and particularly relates to an optical film or lens having an aspherical shape.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique in which a blank lens or a molding die having a resin supported on its surface is driven to rotate, and a centrifugal force obtained by this rotation is used to form a lens. For example, JP-A-7-8
Japanese Patent Application Laid-Open Nos. 9-59033 and 9-188525 disclose a technique of obtaining a lens by rotating a blank lens having a resin supported on its surface about the optical axis thereof, as described in Japanese Patent Application Laid-Open No. 0946/96. As described in Japanese Patent Application Laid-Open Publication No. H10-209, there is known a technique of obtaining a lens by rotating a molding die having a resin supported on its surface so that the surface draws a circle.

The technique described in Japanese Patent Application Laid-Open No. 7-80946 discloses a technique in which a resin is moved in a direction away from the optical axis by centrifugal force obtained by rotationally driving the blank lens about the optical axis to move the aspherical lens. What you get. The technology described in JP-A-9-59033 and JP-A-9-188525 is to obtain a spherical lens having a fixed shape by a centrifugal force obtained by rotating the surface of a blank lens so as to draw a circle. It is something to do.

[0004]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No. 7-8 / 1995
The technique described in Japanese Patent No. 0946 has a problem that the resin can be moved only in a direction away from the optical axis, and the shape of a lens that can be formed is limited. Also, JP-A-9-59033 and JP-A-9-18852
The technique described in Japanese Patent Application Laid-Open No. 5-50095 is for obtaining a lens having a fixed shape, and also has a problem that the shape of the lens that can be formed is limited. Also, JP-A-9-59
In the case where a lens is formed using a molding die as in the techniques described in Japanese Patent Application Laid-Open No. 033/093 and Japanese Unexamined Patent Application Publication No. 9-188525, an aspherical surface can be used if the transfer surface of the molding die has an aspherical shape. Although it is possible to form a lens, it is necessary to create a molding die corresponding to each desired aspherical lens shape, which increases the cost and also forms an aspherical transfer surface. There is a problem that is difficult.

The present invention provides an optical film forming apparatus which has a high degree of freedom in the surface shape of a lens to be formed and does not require an aspherical transfer surface, and a lens which forms a lens using the optical film forming apparatus. It is an object to provide a forming method and a lens formed by the optical film forming apparatus or the lens forming method.

[0006]

In order to achieve the above object, the invention according to claim 1 comprises a first rotating shaft extending in a substantially vertical direction and a second rotating shaft for rotatably supporting the formed body. A rotation shaft, a support member provided integrally with the first rotation shaft, for swingably supporting the second rotation shaft and rotatably supporting the second rotation shaft about the axis of the second rotation shaft; A first drive unit for rotating the center of rotation, and a second drive unit for rotating the second rotation shaft about the center thereof, the second rotation shaft supporting a molded body having a resin on its surface In this state, the first rotating shaft is driven to rotate by the first driving unit and the second rotating shaft is driven to rotate by the second driving unit, and the resin on the surface of the molded body is cured, thereby forming the optical film. In the optical film forming apparatus.

According to a second aspect of the present invention, in the optical film forming apparatus of the first aspect, the second rotating shaft supports the molded body such that the surface of the molded body supporting the resin faces the support member. It is characterized by doing.

According to a third aspect of the present invention, in the optical film forming apparatus of the first aspect, the second rotating shaft is formed such that a surface of the molded body supporting the resin faces the opposite side of the supporting member. It is characterized by supporting.

The invention described in claim 4 is the first to third aspects of the present invention.
In the optical film forming apparatus according to any one of the above, the second rotating shaft supports the molded body such that the axis of the molded body is substantially parallel to the axis of the second rotating axis on the axis of the molded body. It is characterized by the following.

[0010] The invention according to claim 5 is the invention according to claims 1 to 3.
In the optical film forming apparatus according to any one of the above, the second rotation axis may move the molded body at a position shifted from the axis of the molded body,
The second rotating shaft and the coaxial shaft are supported so as to be substantially parallel.

[0011] The invention according to claim 6 is the invention according to claims 1 to 5.
The optical film forming apparatus according to any one of the above, further comprising a plurality of second rotation axes.

The invention according to claim 7 provides the invention according to claims 1 to 6
In the optical film forming apparatus according to any one of the above, the resin supported by the molded article is a photocurable resin, and has an irradiation unit for irradiating the photocurable resin applied to the molded article with light. Then, while the molded body coated with the photocurable resin is supported by the second rotating shaft, the first rotating shaft is driven to rotate by the first driving means, and the second rotating shaft is driven by the second driving means. An optical film is formed by rotating a shaft and irradiating the photocurable resin applied to the molded body with light by the irradiation means to cure the resin.

The invention according to claim 8 is the first to sixth aspects.
In the optical film forming apparatus according to any one of the above, the resin supported by the molded body is a material that is melted by heating,
In a state where the molded body supporting the molten resin is supported by the second rotating shaft, the first rotating shaft is driven to rotate by the first driving means, and the second rotating shaft is driven to rotate by the second driving means. Then, the optical film is formed by cooling and curing the resin.

The invention according to claim 9 is the first to eighth aspects.
The optical film forming apparatus according to any one of the above, wherein the shape of the optical film is changed by changing the rotation speed of the first rotation shaft by the first driving means.

According to a tenth aspect of the present invention, there is provided the optical film forming apparatus according to any one of the first to ninth aspects, wherein
The shape of the optical film is changed by changing the rotation speed of the second rotation shaft by the driving means.

According to an eleventh aspect of the present invention, in the optical film forming apparatus according to any one of the first to tenth aspects, the surface of the molded body supporting the resin is convex in a direction away from the second rotation axis. It is characterized by having a shape of

According to a twelfth aspect of the present invention, there is provided a rotating shaft, a supporting member provided integrally with the rotating shaft and supporting a molded body so as to rotate integrally with the rotating shaft, and rotating the rotating shaft about its axis. Driving means for driving, and in a state where the molded body having the resin supported on the surface by the support member is supported, the rotating shaft is rotationally driven by the driving means to cure the resin on the surface of the molded body. In the optical film forming apparatus for forming an optical film by the, the surface supporting the resin of the molded body, on a plane substantially orthogonal to the rotation axis, the distance from the rotation center of the rotation axis to the same surface, the same surface It is characterized in that it has a shape whose curvature radius is substantially the same.

According to a thirteenth aspect of the present invention, there is provided a rotating shaft, a supporting member provided integrally with the rotating shaft and supporting the molded body so as to rotate integrally with the rotating shaft, and rotating the rotating shaft about its axis. And a driving means for driving the rotating shaft with the driving means in a state in which the molded body supporting the resin on the surface is supported by the support member, thereby curing the resin on the surface of the molded body. In an optical film forming apparatus that forms an optical film, on a plane substantially perpendicular to the rotation axis, the radius of curvature of the same surface is larger than the distance from the rotation center of the rotation shaft to the surface supporting the resin of the molded body. It is characterized by being large.

According to a fourteenth aspect of the present invention, in the optical film forming apparatus according to the twelfth or thirteenth aspect, the supporting member supports the molded body such that a surface of the molded body supporting the resin faces the rotating shaft. It is characterized by doing.

According to a fifteenth aspect of the present invention, in the optical film forming apparatus according to the twelfth or thirteenth aspect, the supporting member is formed such that a surface of the molded body supporting the resin faces the opposite side of the rotation axis. It is characterized by supporting.

According to a sixteenth aspect of the present invention, in the optical film forming apparatus according to any one of the twelfth to fifteenth aspects,
The resin supported by the molded body is a photocurable resin, and has an irradiation unit for irradiating light to the photocurable resin applied to the molded body, and the photocurable resin is applied by the support member. In a state where the molded body is supported, the driving means rotates the rotation shaft, and the irradiation means cures the photocurable resin applied to the molded body by irradiating light to form an optical film. It is characterized by.

According to a seventeenth aspect of the present invention, in the optical film forming apparatus according to any one of the twelfth to fifteenth aspects,
The resin supported by the molded body is a material that is melted by heating, and while the molded body supporting the molten resin supported by the support member is supported, the rotation shaft is rotationally driven by the driving unit to cool the resin. And curing to form an optical film.

According to an eighteenth aspect of the present invention, in the optical film forming apparatus according to any one of the first to seventeenth aspects, the molded body is a blank lens.

According to a nineteenth aspect of the present invention, in the optical film forming apparatus according to any one of the first to seventeenth aspects, the molded body is a molding die, and has the molding die. .

According to a twentieth aspect of the present invention, there is provided a lens forming method for forming a lens by integrally forming an optical film on a blank lens using the optical film forming apparatus according to the eighteenth aspect.

According to a twenty-first aspect of the present invention, there is provided a lens molding method for obtaining, as a lens, an optical film formed on a molding die using the optical film forming apparatus according to the nineteenth aspect.

According to a twenty-second aspect of the present invention, there is provided a lens formed by integrally forming an optical film on a blank lens by the optical film forming apparatus according to the eighteenth aspect or the lens molding method according to the twentieth aspect.

According to a twenty-third aspect of the present invention, there is provided a lens formed as an optical film on a molding die by the optical film forming apparatus according to the nineteenth aspect or the lens molding method according to the twenty-first aspect.

[0029]

FIG. 1 shows an optical film forming apparatus according to a first embodiment of the present invention. The optical film forming apparatus 1 includes a rotating shaft 3 as a first rotating shaft extending substantially vertically, a rotating shaft 5 as a second rotating shaft for rotatably supporting the molded body 4, and a rotating shaft 5. And a supporting member 7 provided integrally with the rotating shaft 3 and supporting the rotating shaft 5 via the arm 6.
And at least a motor 8 as first driving means for driving the rotation axis about the axis thereof and a motor 9 as second driving means for driving the rotation axis 5 about the axis. ing.

The lower end of the rotating shaft 3 is supported by a bearing 10. The bearing 10 is disposed on the upper surface of the substrate 2 disposed on a substantially horizontal plane. A pulley 11 is provided at a position near the bearing 10 on the rotating shaft 3. The motor 8 has a bearing 10
Is disposed on the upper surface of the substrate 2 in the vicinity of. A pulley 13 is provided on a shaft 12 of the motor 8. Pulley 11, 1
A belt 14 is wound around 3, and the driving force of the motor 8 is transmitted to the rotating shaft 3 via the belt 14. The support member 7 has a base 15 provided on the rotating shaft 3 and a support 16 extending substantially horizontally from the base 15. The support portion 16 has a tip 17 divided into two branches, and has a substantially Y-shape. A shaft 21 is arranged in a direction perpendicular to the paper of the drawing so as to connect the forked ends 17 to each other. Support member 7
The arm 6 is swingably supported by the shaft 21 so as to be sandwiched by the tip 17. The arm 6 is a hollow cylindrical member, and has a motor 9 built in near the tip thereof. The rotating shaft 5 is rotatably supported by a bearing 18 disposed at the tip of the arm 6, and the tip is exposed outside the arm 6. Therefore, the support portion 16 supports the rotating shaft 5 so as to be swingable and rotatable about the axis of the rotating shaft 5.

The support member 7 is provided with two support portions 16. In FIG. 1, only one of the support portions 16 is shown in its entirety, and the other is shown only in the vicinity of the base portion 15. The parts not shown in FIG. 1 also have the same configuration as those shown in FIG. 1 and, by the same configuration as described above, can rotate the rotation shaft 5 and can freely rotate about the axis of the rotation shaft 5. I support it. Each support part 1
Numerals 6 are arranged so as to be located on the same straight line, so that the balance when the rotary shaft 3 is rotationally driven is maintained. Three or more supporting portions 16 and the arms 6 and the rotating shafts 5 supported by the supporting portions 16 may be provided. In this case, the angles between the supporting portions 16 about the rotating shaft 3 are substantially the same. It is desirable to arrange them symmetrically. Further, a balance weight may be provided in place of any of the support portions 16.

The molded body 4 forms a blank lens or a molding die. The molded body 4 has a resin 20 on the surface 19.
When the molded body 4 forms a blank lens, the optical film is integrated with the blank lens to form one lens as a whole, and is formed by this integration. The molded body 4 is not a constituent element of the optical film forming apparatus 1 and the optical film is separate from the molded body when the molded body 4 forms a mold. As a target, a lens formed only on an optical film, formed on a molding die,
The molded body 4 is a component of the optical film forming apparatus 1. In the present embodiment, a molded body 4 including a blank lens and a molding die is referred to and described separately when necessary. When the molded body 4 is used as a blank lens, the material is plastic, but it can be glass. When the molded body 4 is used as a molding die, the material is iron. It can be a metal alloy or a transparent material such as glass or plastic.

In this embodiment, the rotating shaft 5 is
Are supported such that the surface 19 faces the opposite side of the support member 7. The rotating shaft 5 is formed so that the molded body 4 is substantially parallel to the axis of the molded body 4 on the axis of the molded body 4, that is, the rotating shaft 5 and the axis of the molded body 4 are substantially coaxial. It is supported so that it is located above. Here, the axis of the molded body 4 means the optical axis when the molded body 4 forms a blank lens, and the central axis when the molded body 4 forms a molding die, that is, the optical axis when the blank lens is formed. And the axis which is substantially the same in any case.

The resin 20 may be a photo-curable resin or a material that can be melted by heating. However, when a photo-curable resin is used, the resin is applied to the resin applied to the molded body 4. Irradiation means for irradiating light having a curing wavelength is provided in the optical film forming apparatus 1. Whichever resin is used, the resin 20 is supported on the surface 19 so as to be located on the axis of the molded body 4.

The resin 20 may be supplied to the surface 19 either before or after the molded body 4 is fixed to the rotating shaft 5. However, when the resin 20 is supplied before the molded body 4 is fixed to the rotating shaft 5, 20 can be applied dropwise so as to be positioned on the axis of the molded body 4. After the application, the molded body 4 is fixed to the rotating shaft 5 while minimizing the displacement of the resin. When a material that melts by heating is used as the resin 20, the resin 20 is once transferred to a spherical mold by injection molding or a press such as a glass press, and molded. From this, it can be supplied to the molded body 4. When a photo-curable resin is used as the resin 20, GRANDIC RC8790, which is an ultraviolet-curable resin, is used for the material, but JSR Z9002, which is also an ultraviolet-curable resin, and VL-003 manufactured by Three Bond Co., Ltd. as other visible light-curable resins. Can be used, and when melting by heating, acrylic resin can be used as the material.

Since the present embodiment has the above configuration,
As shown in FIG. 1, in a state where the molded body 4 having the resin 20 on the surface 19 is supported by the rotating shaft 5, the rotating shaft 3 is driven to rotate at an angular speed α by the motor 8 and the rotating shaft 5 is rotated by the motor 9 to the angular speed β. As shown in FIG. 2, the rotating shaft 5 rotates at an angle θ with respect to the rotating shaft 3, that is, the vertical axis, so as to balance the angular velocity α. Since the molded body 4 is rotated about its axis at an angular velocity β, the centrifugal force of the rotating shaft 3 and the centrifugal force of the rotating shaft 5 act on the resin 20 at the same time. In FIG.
These forces will be described with reference to FIG.

In FIG. 3, F (α ₁ ) is the centrifugal force of the resin 20 applied on the surface 19 at a point relatively close to the axis of the molded body 4 due to the rotational drive of the rotary shaft 3. F (β ₁ ) represents the magnitude of the centrifugal force acting by the rotation drive of the rotating shaft 5 at the same point,
F (α ₂ ) is the value of the resin 20 applied on the surface 19.
The magnitude of the centrifugal force exerted by the rotation drive of the rotating shaft 3 at a point relatively close to the periphery of the molded body 4 is represented by F
(Β ₂ ) indicates the magnitude of the centrifugal force acting on the same point due to the rotational drive of the rotary shaft 5. Note that F (1)
Is the resultant of F (α ₁ ) and F (β ₁ ), and F (2) is F (α
₂ ) and F (β ₂ ). As is clear from this figure, at a point close to the axis of the molded
The action of the rotation of the rotating shaft 3 at the angular velocity α becomes more dominant than the action of the rotation of the rotating shaft 5 at the angular velocity β as compared to the point near the periphery of The action of the rotation of the rotating shaft 5 at the angular velocity β becomes more dominant than the action of the rotating shaft 3 at the angular velocity α as compared to the point near the axis of the body 4.

Further, since the surface 19 has a convex shape in a direction away from the rotating shaft 5, that is, a convex shape in a direction in which the centrifugal forces F (α ₁ ) and F (α ₂ ) act, these forces are large. The larger the angular velocity α is, the more the resin 20 tends to move toward the axis of the molded body 4. On the other hand, the larger the centrifugal forces F (β ₁ ) and F (β ₂ ), that is, the angular velocity The larger β is, the more the resin 20 tends to move toward the periphery of the molded body 4.
Therefore, by adjusting and changing the magnitude of the angular velocity α and / or the angular velocity β, that is, the rotational speed of the rotary shaft 3 and / or the rotational speed of the rotary shaft 5, the surface shape of the resin 20 can be variously aspherical. Can be changed to As the rotation speed of the rotating shaft 3 increases, the thickness of the portion corresponding to the axis of the formed body 4 increases, and the thickness of the portion corresponding to the peripheral portion of the formed body 4 decreases, and the rotation speed of the rotating shaft 5 decreases. As the size increases, the thickness of the portion corresponding to the axis of the molded body 4 decreases, and the thickness of the portion corresponding to the peripheral portion of the molded body 4 increases. In addition,
The surface 19 may have a convex shape in the direction approaching the rotation axis 5, that is, a concave shape in the direction in which the centrifugal forces F (α ₁ ) and F (α ₂ ) act. This gives a force in a direction to move 20 to the periphery of the molded body 4.

When a photocurable resin is used as the resin 20, the resin 20 is irradiated with the irradiation means (not shown) in a state where each of the rotating shafts 3 and 5 is driven to rotate as shown in FIG. Obtain an optical film with a shape. The wavelength of the light applied to the resin 20 by the irradiation means is a wavelength at which the resin 20 reacts. When the resin 20 is an ultraviolet curable resin, ultraviolet light is applied. When the resin 20 is a visible light curable resin, visible light is applied. I do. When a resin that is melted by heating is used as the resin 20, the resin 20 is cooled and cured by heat radiation in the same state,
Obtain an aspheric optical film. When a resin that is melted by heating is used as the resin 20, it is possible to forcibly cool the resin 20 by lowering the ambient temperature or blowing air with a fan. The surface shape of the obtained optical film can be changed by adjusting and changing the rotation speed of the rotation shaft 3 and / or the rotation speed of the rotation shaft 5 as described above.

The factors that determine the surface shape of the optical film include the rotation speed of the rotation shaft 3 and the rotation speed of the rotation shaft 5, the type of resin such as the reactivity of the resin 20 to light, the viscosity, and the like. Of curvature and coefficient of friction of resin 20 and surface 1
9, the outer diameter of the molded body 4, the temperature, the ambient temperature,
The temperature of the resin 20, the time of the start of rotation of the rotating shaft 3 and the rotating shaft 5, the time from the start of rotation of the rotating shaft 3 and the rotating shaft 5 to the start of irradiation by the irradiating means or the start of curing by air blowing, etc. To the end of curing.

As an example, the radius of the molded body 4 is R, the outer diameter is 2 he, and the resin 20 applied on the surface 19 is actuated by rotating the rotating shaft 3 at a point on the peripheral edge of the molded body 4. The magnitude of the centrifugal force is represented by F (α), and the magnitude of the centrifugal force acting by the rotation drive of the rotating shaft 5 at the same point is represented by F (α).
(Β), when these ratios F (β) / F (α) are K (≧ 0), if R = 50 and he = 30, K = 0.6 to
By setting the ratio to 0.7, various aspherical shapes can be formed.

When the surface shape of the optical film is determined by adjusting the time from the start to the end of the curing, the power of the light irradiated by the irradiation means may be adjusted, and as shown in FIG. The irradiation means (not shown) can partially irradiate the light curable resin on the molded body 4 with the light 22 so that the order of curing the photocurable resin can be selected according to the part. good. In FIG. 4, as shown in FIG. 4A, first, the resin at the peripheral edge of the molded body 4 is cured, and then, as shown in FIG. are doing. The order of curing of the photocurable resin may be started from the center of the molded body 4 or may be set in more detail. As shown in FIG. 4, as a configuration for partially irradiating light to the photocurable resin, a filter 23 in which a hole 24 is formed is provided so as to be movable, and In addition to the configuration for moving the position, a configuration in which the irradiation means is provided movably,
A configuration in which a plurality of irradiating means are provided and the irradiating means blinks according to a place where irradiation is desired, or the like can be given. The hole 24 may be a slit or a diaphragm. When the resin 20 is made of a material that is melted by heating, the same configuration can be obtained by replacing the irradiation unit with a fan when the resin is photocurable. When the resin is a photocurable resin, the holes 24 can be used as a grating mask.

As shown in FIG. 5, the rotating shaft 5 may support the molded body 4 so that the surface 19 faces the support member 7 side. A holding member 25 for holding the formed body 4 is fixedly provided at the tip of the rotating shaft 5, and the formed body 4 rotates integrally with the rotating shaft 5. Also in this case, the surface 19 has a convex shape in a direction away from the rotation shaft 5. However, in this case, the convex side has an aspherical shape in the above case, whereas the concave side has an aspherical shape. When the resin 20 is a light-curing resin, the gripping member 25 is made of a light-transmitting member, so that the degree of freedom of the arrangement position of the irradiating means is improved. May be disposed inside the gripping member 25, or when the molded body 4 is transparent such as a blank lens, a hole is formed in the bottom of the gripping member 25 as shown in FIG. Irradiation means may be provided at a position where the light to be transmitted passes through the blank lens. The surface 19 may have a convex shape in a direction approaching the rotation shaft 5. In this case, both the centrifugal force due to the rotation of the rotation shaft 3 and the centrifugal force due to the rotation of the rotation shaft 5 apply the resin 20 to the molded body 4. This gives a force in the direction to move the periphery.

As shown in FIG. 6, the rotating shaft 5 is
May be supported at a position shifted from the axis of the molded body 4 such that the rotating shaft 5 and the axis of the molded body 4 are substantially parallel to each other. By supporting the molded body 4 in this manner, an optical film having an aspheric surface shape in which the thickness of the optical film is asymmetric with respect to the axis of the molded body 4, that is, a so-called off-axis aspheric surface, can be formed. .

FIGS. 7 and 8 show a second embodiment of the present invention. In this embodiment, the same parts as those in the first embodiment are omitted from the drawings or denoted by reference numerals, and different parts will be described. This embodiment does not have the second rotating shaft, and the molded body 4 is supported by the support member 7 provided integrally with the rotating shaft 3. The support member 7 has a rod-shaped support portion 27 extending in a substantially horizontal direction from the base portion 15 provided on the rotating shaft 3, and supports the molded body 4 at the support portion 27.

The surface 28 of the molded body 4 supporting the resin 20 is
It has a convex shape in a direction away from the support member 7, and as shown in FIG.
The distance from the rotation center of the rotating shaft 3 to the surface 28 and the radius of curvature of the surface 28 are substantially the same. Accordingly, when the rotating shaft 3 is rotationally driven by the motor 8 as a driving means, the resin 20 moves toward the axis of the molded body 4 in the direction in which the rotating shaft 3 is disposed, that is, in the vertical direction, as shown in FIG. The thickness is the largest on the same axis, but is uniform on the horizontal plane as shown in FIG. That is, an optical film having a surface shape close to the surface shape of the toroidal lens can be formed. The shape of the optical film in the vertical direction can be changed by adjusting the angular speed α of the rotating shaft 3, that is, the rotating speed of the rotating shaft 3. Specifically, as the rotation speed of the rotating shaft 3 increases, the thickness of the portion corresponding to the axis of the molded body 4 increases, and the thickness of the portion corresponding to the peripheral portion of the molded body 4 decreases. In this case, it is necessary to increase the rotation speed of the rotating shaft 3, in other words, the size of the angular speed α so that the magnitude of gravity can be ignored compared to the magnitude of the centrifugal force generated by the rotation driving of the rotating shaft 3. There is.

In order to prevent the resin 20 from shifting during acceleration from the start of rotation of the rotating shaft 3 to the constant speed,
The acceleration of the rotation of the rotating shaft 3 is adjusted. The support member 7 has two support portions 27 arranged on a straight line and supports the two molded bodies 4. However, the number of the molded bodies 4 to be supported is not limited to this. What should be arranged in contrast,
The fact that a balance weight can be provided is the same as in the first embodiment.

The surface 28 satisfies the condition that, on a plane perpendicular to the rotation axis 3, the distance from the rotation center of the rotation axis 3 to the surface 28 and the radius of curvature of the surface 28 are substantially the same. For example, the surface 28 is not limited to be directed to the opposite side of the rotating shaft 3 as shown in FIGS. 7 and 8, and the same configuration as the gripping member 25 shown in FIG. May be directed to the rotating shaft 3 side. Other factors that determine the surface shape of the optical film, such as when the resin 20 is a photocurable resin, when it is a material that can be melted by heating, when the molded body 4 is a blank lens, and when it is a molding die, The configuration examples and the like in the case of (1) are the same as those of the first embodiment. The rotating shaft 3 may be arranged in a substantially horizontal direction instead of extending substantially vertically. In this case, the distortion of the surface shape of the optical film in the vertical direction due to the influence of gravity can be prevented.

FIGS. 9 and 10 show a third embodiment of the present invention. In this embodiment, the same parts as those in the second embodiment are omitted from the drawings or denoted by reference numerals, and different parts will be described. The surface 29 of the molded body 4 supporting the resin 20 has a convex shape in a direction away from the support member 7, and the rotation of the rotation shaft 3 on a plane orthogonal to the rotation shaft 3 as shown in FIG. The curvature radius of the surface 29 is larger than the distance from the center to the surface 29.
Therefore, when the rotating shaft 3 is driven to rotate, the resin 20 moves toward the axis of the molded body 4 in the vertical direction as shown in FIG. 9 and becomes the thickest on the same axis, but as shown in FIG.
On the horizontal surface, the molded body 4 moves toward the peripheral edge and becomes thickest at the peripheral edge. That is, an optical film in which the thickness distribution of the resin 20 has a saddle shape can be formed.

The surface shape of the optical film depends on the length of the support 27 and can be changed by adjusting the angular speed α of the rotating shaft 3, that is, the rotating speed of the rotating shaft 3.
Specifically, as the length of the support portion 27 becomes shorter, the thickness of the portion corresponding to the axis of the molded body 4 becomes thinner, the thickness of the portion corresponding to the peripheral portion of the molded body 4 becomes thicker, and the rotating shaft 3 As the rotational speed of the molded body 4 increases, the thickness of the portion corresponding to the axis of the molded body 4 increases, and the thickness of the portion corresponding to the peripheral edge of the molded body 4 decreases. In this case, it is necessary to increase the rotation speed of the rotating shaft 3, in other words, the size of the angular speed α so that the magnitude of gravity can be ignored compared to the magnitude of the centrifugal force generated by the rotation driving of the rotating shaft 3. There is. The length of the support portion 27 is determined in a range that satisfies the above-described condition that the surface 29 has a larger radius of curvature than the distance from the rotation center of the rotating shaft 3 to the surface 29. Resin 2
In the second embodiment, the acceleration of the rotation of the rotating shaft 3 is adjusted so that 0 does not cause a positional shift, the pressure of the atmosphere is preferably reduced, and the configuration of the support member 7 and the like are the same as those in the second embodiment. Same as described.

With respect to the surface 29, if the condition that the radius of curvature of the surface 29 is larger than the distance from the rotation center of the rotation shaft 3 to the surface 29 on a plane orthogonal to the rotation axis 3 is satisfied. The surface 29 is not limited to the side opposite to the rotating shaft 3 as shown in FIGS. 9 and 10, as in the second embodiment. In addition, when the resin 20 is a photocurable resin, and when the resin 20 is a material that is melted by heating,
When the molded body 4 is a blank lens or a molding die, each configuration example in each of these cases, the rotating shaft 3 may be arranged in a substantially horizontal direction instead of extending substantially vertically. This is the same as described in the second embodiment.

Although each of the embodiments has been described above, when the molded body 4 is a molding die and the surface of the molded body 4 supporting the resin 20 faces the opposite side of the supporting member or the rotating shaft, the resin 20 may be used.
If the optical film formed by the same stress as the centrifugal force of the rotating shaft is used to peel off from the molding die by utilizing the stress when the resin shrinks during curing, the optical film is separated from the molding die. The steps can be omitted. In this case, if the mold is subjected to a mold release treatment such as application of a mold release agent, the mold releasability is further improved. Such release processing is performed in the step of peeling off the formed optical film when the molded body 4 is a molding die and the surface of the molded body 4 supporting the resin 20 faces the support member or the rotating shaft side. It is convenient. When the molded body 4 is a blank lens, by using the same material for the resin 20 and the blank lens, refraction of light at the joint surface can be prevented. In the first embodiment, the case where the number of rotation axes is two is described, but the number of rotation axes may be three or more as appropriate.
In the embodiment, the optical film is formed only on one side of the molded body. However, if a gripping member is used, the optical film can be formed on both sides of the molded body. In an optical film forming apparatus capable of supporting a plurality of formed bodies, in each formed body, what shape and other various properties of the formed body are to be selected, and what shape and other various properties of the optical body are to be selected. The film can be formed or selected freely.

[0053]

According to the first aspect of the present invention, the first rotating shaft extending substantially vertically, the second rotating shaft for rotatably supporting the formed body, and the first rotating shaft. A supporting member which is provided integrally with the supporting member and rotatably supports the second rotating shaft about the axis of the second rotating shaft, and a first drive which rotates the first rotating shaft about the center of the second rotating shaft. Means for rotating the second rotation shaft about the axis thereof, and
While the molded body having the resin on the surface is supported by the rotating shaft, the first driving unit is driven to rotate the first rotating shaft, and the second driving unit is driven to rotate the second rotating shaft. Since the optical film forming apparatus forms the optical film by curing the resin on the surface of the body, the surface shape of the optical film can be determined by two different centrifugal forces, and the surface shape of the formed optical film An optical film forming apparatus having a high degree of freedom can be provided.

According to the second aspect of the present invention, in the optical film forming apparatus according to the first aspect, the second rotating shaft is formed such that a surface of the molded body supporting the resin faces the support member side. Therefore, it is possible to provide an optical film forming apparatus capable of forming an optical film having an aspherical surface on the support member side and preventing the optical film from being detached from the molded body.

According to the third aspect of the present invention, in the optical film forming apparatus according to the first aspect, the second rotating shaft is arranged such that the surface of the molded body supporting the resin faces the opposite side of the supporting member. Since the molded body is supported, it is possible to provide an optical film forming apparatus capable of forming an optical film having an aspherical surface on the side opposite to the support member.

According to a fourth aspect of the present invention, in the optical film forming apparatus according to any one of the first to third aspects,
The second rotation axis supports the molded body on the axis of the molded body so that the axis of the second rotation axis is substantially parallel to the axis of the molded body. An optical film forming apparatus capable of forming a film can be provided.

According to a fifth aspect of the present invention, in the optical film forming apparatus according to any one of the first to third aspects,
The second rotating shaft supports the molded body at a position deviated from the axis of the molded body so that the second rotating shaft and the coaxial axis are substantially parallel to each other. An optical film forming apparatus having a spherical shape can be provided.

According to a sixth aspect of the present invention, in the optical film forming apparatus according to any one of the first to fifth aspects,
Since there are a plurality of second rotation axes, an optical film forming apparatus capable of forming a plurality of optical films at the same time can be provided.

According to a seventh aspect of the present invention, in the optical film forming apparatus according to any one of the first to sixth aspects,
The resin supported by the molded article is a photocurable resin, and has an irradiation unit for irradiating the photocurable resin applied to the molded article with light, and the photocurable resin is applied by the second rotation axis. In a state where the formed body is supported, the first drive unit is driven to rotate the first rotation shaft and the second drive unit is driven to rotate the second rotation shaft, and the irradiation unit is applied to the formed body. The optical film is formed by irradiating the cured photo-curable resin with light to form an optical film. Therefore, the time until curing of the resin can be controlled by irradiating the light with the irradiating means, so that the degree of freedom in forming the optical film is high An optical film forming apparatus can be provided.

According to an eighth aspect of the present invention, in the optical film forming apparatus according to any one of the first to sixth aspects,
The resin supported by the molded body is a material that is melted by heating, and the first drive shaft rotates the first rotating shaft with the second rotating shaft supporting the molded body supporting the molten resin. Since the optical film is formed by driving and rotating the second rotating shaft by the second driving means, and cooling and curing the resin, the means for curing the resin is relatively simple without any special means. An optical film forming apparatus having a simple configuration can be provided.

According to the ninth aspect of the present invention, in the optical film forming apparatus according to any one of the first to eighth aspects,
Since the shape of the optical film is changed by changing the rotation speed of the first rotating shaft by the first driving means, it is possible to control the aspherical shape formed by moving the resin in the radial direction of the formed body. An optical film forming apparatus that can be provided.

According to the tenth aspect, the first aspect is provided.
In the optical film forming apparatus according to any one of (1) to (9), the shape of the optical film is changed by changing the rotation speed of the second rotating shaft by the second driving means, so that the radial direction of the molded body is changed. An optical film forming apparatus capable of controlling the aspherical shape formed by the movement of the resin in the step (a) can be provided.

According to the eleventh aspect, the first aspect is provided.
In the optical film forming apparatus according to any one of Items 10 to 10, the surface of the molded body supporting the resin has a convex shape in a direction away from the second rotation axis. It is possible to provide an optical film forming apparatus in which the movement can be made to be opposite to each other, and the degree of freedom of the surface shape of the optical film to be formed is further increased.

According to the twelfth aspect of the present invention, a rotating shaft, a support member provided integrally with the rotating shaft and supporting the molded body so as to rotate integrally with the rotating shaft, And a driving means for rotationally driving the resin, and in a state where the molded body having the resin supported on the surface by the support member is supported, the rotating shaft is rotationally driven by the driving means to cure the resin on the surface of the molded body. In the optical film forming apparatus for forming the optical film by performing, the surface of the molded body supporting the resin is, on a plane substantially orthogonal to the rotation axis, the distance from the rotation center of the rotation axis to the same surface, and Since it has a shape with the same curvature radius as the surface, it is the thickest on the axis of the molded body in the direction parallel to the rotation axis and the thickness is uniform in the plane perpendicular to the rotation axis, similar to a toroidal curved surface That can form an optical film having It is possible to provide a film forming apparatus.

According to the thirteenth aspect of the present invention, a rotating shaft, a support member provided integrally with the rotating shaft and supporting the molded body so as to rotate integrally with the rotating shaft, and the rotating shaft being centered on the rotating shaft. A driving unit for driving the rotation, and in a state where the molded body having the resin supported on the surface by the support member is supported, the driving unit is driven to rotate the rotating shaft to cure the resin on the surface of the molded body. In the optical film forming apparatus for forming an optical film by the above, on a plane substantially orthogonal to the rotation axis, from the distance from the rotation center of the rotation axis to the surface supporting the resin of the molded body, the curvature radius of the same surface Is bigger,
Form an optical film that is thickest on the axis of the molded body in the direction parallel to the rotation axis and thickest on the periphery of the molded body in a plane perpendicular to the rotation axis, and that has a saddle-shaped thickness distribution. It is possible to provide an optical film forming apparatus capable of performing the above.

According to the invention of claim 14, according to claim 1,
14. In the optical film forming apparatus according to 2 or 13, since the support member supports the molded body such that a surface of the molded body that supports the resin faces the rotation axis, the surface on the rotation axis side has an aspheric shape. An optical film forming apparatus capable of forming a formed optical film can be provided.

According to the fifteenth aspect, the first aspect is provided.
14. The optical film forming apparatus according to item 2 or 13, wherein the support member supports the molded body such that a surface of the molded body that supports resin faces the opposite side of the rotation axis. An optical film forming apparatus capable of forming an optical film having an aspherical shape can be provided.

According to the invention of claim 16, claim 1 is
In the optical film forming apparatus according to any one of 2 to 15, the resin supported by the molded body is a photocurable resin,
An irradiation unit for irradiating light to the photocurable resin applied to the molded body, and the rotating shaft is driven by the driving unit in a state where the molded body coated with the photocurable resin is supported by the support member. Is rotated to form an optical film by irradiating the photocurable resin applied to the molded body with light by the above-mentioned irradiation means to cure the resin, so that the time until curing of the resin by irradiation of light by the irradiation means is reduced. An optical film forming apparatus having a high degree of freedom in forming an optical film because it can be controlled can be provided.

According to the seventeenth aspect, according to the first aspect,
16. The optical film forming apparatus according to any one of 2 to 15, wherein the resin supported by the molded body is a material that is melted by heating, and the molded body supporting the molten resin by the support member is supported. Since the optical film is formed by rotating and driving the rotation shaft by the driving means and cooling and curing the resin, an optical film having a relatively simple configuration without particularly requiring a means for curing the resin. A forming device can be provided.

According to the eighteenth aspect, according to the first aspect,
In the optical film forming apparatus according to any one of Items 1 to 17, since the molded body is a blank lens, by forming an optical film having an aspheric surface on the blank lens so as to be integrated, An optical film forming apparatus capable of forming a lens having a spherical surface can be provided.

According to the nineteenth aspect of the present invention, the first aspect
In the optical film forming apparatus according to any one of Items 17 to 17, the molded body is a molding die and the molding die is provided, so that the transfer surface of the molding die, that is, the contact surface to the optical film is an aspheric surface. It is possible to provide an optical film forming apparatus that can form an optical film having an aspherical surface without forming a shape, and can obtain this as a lens.

According to the twentieth aspect, according to the first aspect,
The lens forming method of forming a lens by integrally forming an optical film on a blank lens by using the optical film forming apparatus described in 8 above can provide a lens forming method that can obtain the various effects described above.

According to the twenty-first aspect of the present invention, the first aspect
Since there is a lens molding method for obtaining, as a lens, an optical film formed on a molding die using the optical film forming apparatus described in Item 9, it is possible to provide a lens molding method capable of obtaining the various effects described above.

According to the twenty-second aspect, the first aspect is provided.
The lens formed by integrally forming an optical film on a blank lens by the optical film forming apparatus according to claim 8 or the lens molding method according to claim 20, has an aspheric surface and has desired optical characteristics. Can be provided.

According to the twenty-third aspect of the present invention, the first aspect is provided.
22. A lens obtained as an optical film formed on a molding die by the optical film forming apparatus according to claim 9 or the lens molding method according to claim 21, having an aspheric surface and desired optical characteristics. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an optical film forming apparatus to which the present invention is applied.

FIG. 2 is a front view schematically showing the optical film forming apparatus shown in FIG.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a schematic view showing a mode of partially irradiating a resin with light.

FIG. 5 is a schematic diagram showing another supporting mode of the molded body.

FIG. 6 is a schematic view showing still another supporting aspect of the molded body.

FIG. 7 is a front view schematically showing another configuration example of the optical film forming apparatus to which the present invention is applied.

8 is a plan sectional view of the optical film forming apparatus shown in FIG.

FIG. 9 is a front view schematically showing still another configuration example of the optical film forming apparatus to which the present invention is applied.

FIG. 10 is a plan sectional view of the optical film forming apparatus shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 optical film forming device 3 first rotating shaft, rotating shaft 4 molded body 5 second rotating shaft 7 support member 8 first driving means, driving means 9 second driving means 19, 28, 29 Resin of molded body Surface supporting resin 20 resin 22 light irradiated by irradiation means

Claims (23)

[Claims] A first rotating shaft extending in a substantially vertical direction;
A second rotating shaft that rotatably supports the molded body, and a second rotating shaft that is provided integrally with the first rotating shaft and that allows the second rotating shaft to swing and
A supporting member rotatably supported on the center of the rotating shaft, first driving means for rotating the first rotating shaft about the center of the shaft, and a supporting member for rotating the second rotating shaft about the center of the shaft. A second rotating shaft, the first rotating shaft rotatingly driving the first rotating shaft while the molded body having the resin on the surface is supported by the second rotating shaft, and the second rotating shaft. An optical film forming apparatus, wherein an optical film is formed by rotating and driving a second rotating shaft and curing a resin on a surface of a molded body. 2. The optical film forming apparatus according to claim 1, wherein
The optical film forming apparatus, wherein the second rotating shaft supports the molded body such that a surface of the molded body supporting the resin faces the support member side. 3. The optical film forming apparatus according to claim 1, wherein
The optical film forming apparatus according to claim 1, wherein the second rotating shaft supports the molded body such that a surface of the molded body supporting the resin faces the opposite side of the supporting member. 4. The optical film forming apparatus according to claim 1, wherein the second rotating shaft is formed by moving the molded body coaxially with the second rotating shaft on the axis of the molded body. And an optical film forming apparatus, wherein the optical film forming apparatus is supported so that they are substantially parallel to each other. 5. The optical film forming apparatus according to claim 1, wherein the second rotating shaft is configured to rotate the molded body at a position shifted from the axis of the molded body. An optical film forming apparatus, wherein an axis and a coaxial axis are supported so as to be substantially parallel. 6. The optical film forming apparatus according to claim 1, further comprising a plurality of second rotation axes. 7. The optical film forming apparatus according to claim 1, wherein the resin supported by the molded article is a photocurable resin, and the resin supported on the molded article is a photocurable resin. An irradiation unit for irradiating the light, a first driving unit rotating and driving the first rotation shaft in a state where the molded body coated with the photocurable resin is supported by the second rotation shaft; An optical film is formed by rotating a second rotating shaft by a second driving unit and irradiating the photocurable resin applied to the molded body with light by the irradiation unit to cure the resin. Optical film forming equipment. 8. The optical film forming apparatus according to claim 1, wherein the resin supported on the molded body is a material that is melted by heating, and the resin melted on the second rotating shaft. In a state where the molded body supporting the resin is supported, the first drive shaft is rotationally driven by the first drive means and the second rotary shaft is rotationally driven by the second drive means to cool and cure the resin. An optical film forming apparatus characterized in that an optical film is formed by the method. 9. The optical film forming apparatus according to claim 1, wherein the shape of the optical film is changed by changing the rotation speed of the first rotation shaft by the first driving means. An optical film forming apparatus comprising: 10. The optical film forming apparatus according to claim 1, wherein the shape of the optical film is changed by changing the rotation speed of the second rotation shaft by the second driving means. An optical film forming apparatus comprising: 11. The optical film forming apparatus according to claim 1, wherein a surface of the molded body supporting the resin has a convex shape in a direction away from the second rotation axis. Characteristic optical film forming apparatus. 12. A rotating shaft, a supporting member provided integrally with the rotating shaft and supporting the molded body so as to rotate integrally with the rotating shaft, and a driving means for rotating and driving the rotating shaft about the axis. An optical film is formed by rotating the rotation shaft by the driving means while the molded body having the resin supported on the surface by the support member is supported, and curing the resin on the surface of the molded body. In the optical film forming apparatus, the surface of the molded body supporting the resin has a distance from the rotation center of the rotation shaft to the same surface and a radius of curvature of the same surface on a plane substantially perpendicular to the rotation axis. An optical film forming apparatus characterized by having the following shape. 13. A rotary shaft, a support member provided integrally with the rotary shaft and supporting the molded body so as to rotate integrally with the rotary shaft, and a driving means for driving the rotary shaft to rotate about its axis. Then, in a state where the molded body having the resin supported on the surface by the support member is supported, the driving unit rotates the rotating shaft to cure the resin on the surface of the molded body, thereby forming an optical film. In the film forming apparatus, on a plane substantially perpendicular to the rotation axis, a radius of curvature of the surface is larger than a distance from a rotation center of the rotation axis to a surface supporting the resin of the molded body. Optical film forming equipment. 14. The optical film forming apparatus according to claim 12, wherein the support member supports the molded body such that a surface of the molded body supporting the resin faces the rotation shaft. Optical film forming equipment. 15. The optical film forming apparatus according to claim 12, wherein the support member supports the molded body such that a surface of the molded body supporting the resin faces the opposite side of the rotation axis. Optical film forming apparatus. 16. The optical film forming apparatus according to claim 12, wherein the resin supported on the molded article is a photocurable resin, and the resin supported on the molded article is a photocurable resin. Having irradiation means for irradiating light, while supporting the molded body coated with the photocurable resin with the support member,
An optical film forming apparatus, wherein the optical axis is formed by irradiating the photocurable resin applied to the molded body with light by the irradiating means and curing the photocurable resin applied by the irradiating means. . 17. The optical film forming apparatus according to claim 12, wherein the resin supported by the molded body is a material that is melted by heating, and the resin that is melted by the support member is supported. An optical film forming apparatus, wherein the optical film is formed by rotating and driving the rotation shaft by the driving means while supporting the formed body. 18. The optical film forming apparatus according to claim 1, wherein the molded body is a blank lens. 19. The optical film forming apparatus according to claim 1, wherein the molded body is a molding die,
An optical film forming apparatus having the molding die. 20. A lens forming method for forming a lens by integrally forming an optical film on a blank lens using the optical film forming apparatus according to claim 18. 21. A method of forming a lens by using the optical film forming apparatus according to claim 19 to obtain an optical film formed on a mold as a lens. 22. A lens formed by integrally forming an optical film on a blank lens by the optical film forming apparatus according to claim 18 or the lens forming method according to claim 24. 23. A lens obtained as an optical film formed on a molding die by the optical film forming apparatus according to claim 19 or the lens molding method according to claim 21.