WO2014042179A1

WO2014042179A1 - Optical molded article and method for measuring same

Info

Publication number: WO2014042179A1
Application number: PCT/JP2013/074504
Authority: WO
Inventors: 阿久津大; 森基; 原新一朗
Original assignee: コニカミノルタ株式会社
Priority date: 2012-09-14
Filing date: 2013-09-11
Publication date: 2014-03-20
Also published as: JPWO2014042179A1

Abstract

Provided are: an optical molded article which makes it possible to appropriately position an optical function unit in relation to a measurement device, and is capable of ensuring moldability and removal of a position-determining member, even when an optical element is compact; and a method for measuring the same. First and second references bosses (23, 24) and a reference surface (R1) are provided as position-determining parts on a support-shaft part (20). The first and second references bosses (23, 24) and the reference surface (R1), which are the position-determining parts, make it possible to control a position within an xy-plane perpendicular to an optical axis (OA), and control a position in the z-direction parallel to the optical axis (OA), and make it possible to restrict the rotation around an axis parallel to the optical axis (OA), and restrict a slope in relation to an axis which should be parallel to the optical axis (OA); hence, it is possible to position an optical-element component (10), in terms of three-dimensional shift and triaxial tilt, with a high degree of accuracy. As a result, even if the optical-element component (10) is compact, it is possible to position the optical-element component (10) in the correct position inside a measurement device by accurately determining the position therefor, and it is possible to accurately measure the optical surface, etc., of the optical-element component (10).

Description

Optical molded product and measuring method thereof

The present invention relates to an optical molded article including a minute optical element portion to be measured and a measuring method thereof.

As an optical molded product including an optical element, there is one in which a pair of contact portions are provided at both ends of a main body portion having a measurement target surface, and the optical molded product is used as a measurement jig by using the pair of contact portions. It is aligned and fixed (see Patent Document 1).

As another optical molded product, there is one having an optical function part, a support shaft part having a large cross section, and a bridging part having a small cross section provided therebetween (see Patent Document 2). In this optical molded product, the relatively large support shaft portion is for indirectly holding and transporting the optical function portion, and is cut after being combined with the storage cartridge.

However, in the former optical molded article of Patent Document 1, since a contact portion is provided so as to extend directly from the optical element, it is not easy to remove the contact portion after measurement, especially when the optical element is downsized. Since it is close to the optical element, it is not easy to ensure the moldability of the contact portion.

As in the optical molded product of the latter patent document 2, it is effective in terms of facilitating the handling of a miniaturized optical element to provide a positioning function to the support shaft part away from the optical function part. Here, although the above-mentioned support shaft portion enables positioning, it is not built in such a manner that the positional relationship between the optical function portion and the support shaft portion is highly accurate. For this reason, when the optical function unit becomes small, it is not easy to appropriately arrange, for example, a probe-type probe on the effective portion of the optical surface when measuring the optical function unit, and it may be impossible to measure the optical surface. Arise.

JP 2003-194535 A JP 2003-161880 A

The present invention has been made in view of the above-described background, and even if the optical element is downsized, the removal of the positioning member and the moldability can be ensured, and the optical function unit is appropriately disposed with respect to the measuring apparatus. It is an object of the present invention to provide an optical molded product and a measuring method thereof.

In order to achieve the above object, an optical molded product according to the present invention includes an optical element portion having an optical function, a support shaft portion, and a tip side gate portion disposed between the optical element portion and the support shaft portion. The supporting shaft portion has a positioning portion for restricting the three-dimensional arrangement and rotation posture of the optical element portion, and the positioning portion is a surface perpendicular to the optical axis of the optical element portion. It is possible to regulate the arrangement in the direction parallel to the optical axis and to regulate the rotation around the axis parallel to the optical axis and the inclination to the axis that should be parallel to the optical axis. enable.

According to the above optical molded product, the positioning portion provided on the support shaft portion enables the restriction of the position in the plane perpendicular to the optical axis and the restriction of the position in the direction parallel to the optical axis. Since it is possible to restrict the rotation around the parallel axis and to restrict the inclination with respect to the axis that should be parallel to the optical axis, the optical element portion can be arranged with high accuracy with respect to three-dimensional shift and three-axis tilt. Become. As a result, even if the optical element portion is small, it can be precisely positioned and arranged at an appropriate position in the measuring device, and the optical surface of the optical element portion can be precisely measured. it can.

In a specific aspect of the present invention, in the optical molded product, the positioning portion includes a convex or concave portion protruding around the support shaft portion. In this case, it becomes easy to adjust the three-dimensional shift state and the three-axis tilt state. In addition, by adjusting the shape of the convex or concave part as appropriate, it becomes easier to match the support shaft to the shape of the measurement jig when attaching an optical molded product to the measurement device, thereby improving the workability of fixing and positioning. Can do.

In another aspect of the present invention, the positioning unit includes a first reference boss that enables the arrangement of the optical element portion in a plane perpendicular to the optical axis and a rotation around an axis parallel to the optical axis. A second reference boss that enables restriction; and a reference surface that enables restriction of arrangement in a direction parallel to the optical axis and restriction of inclination with respect to an axis that should be parallel to the optical axis. In this case, the first reference boss, the second reference boss, and the reference surface, which are convex or concave portions, can be arranged with high precision with respect to shift and tilt.

In yet another aspect of the present invention, the reference surface is formed between the first reference boss and the second reference boss and around the main body of the support shaft portion. In this case, since the distance between the first reference boss and the second reference boss is increased, the positioning accuracy is improved.

In yet another aspect of the present invention, the positioning portion extends in a first direction perpendicular to the longitudinal direction of the main body of the support shaft portion and the optical axis of the optical element portion, and extends in a first direction in a plane perpendicular to the optical axis. A pair of reference bosses that enable restriction of arrangement in the second direction perpendicular to the optical axis and restriction of rotation around an axis parallel to the optical axis, and restriction of arrangement in the first direction in a plane perpendicular to the optical axis A first reference surface that enables the second reference surface; and a second reference surface that enables the restriction of the arrangement in a direction parallel to the optical axis and the restriction of the inclination with respect to the axis to be parallel to the optical axis. In this case, the pair of reference bosses that are convex or concave portions, the first reference surface, and the second reference surface enable highly accurate arrangement with respect to shift and tilt.

In still another aspect of the present invention, the first and second reference surfaces are formed between the pair of reference bosses and around the main body of the support shaft portion.

In yet another aspect of the present invention, the reference boss has a circular or square cross section with respect to the protruding direction.

In yet another aspect of the present invention, the reference boss has a cross section larger than the outer diameter of the optical element portion in the protruding direction.

In yet another aspect of the present invention, the reference boss is used for projecting the support shaft portion. In this case, the product is more reliably projected by using the reference boss.

In still another aspect of the invention, the positioning portion extends in a second direction parallel to the longitudinal direction of the main body of the support shaft portion, and is disposed in the first direction perpendicular to the second direction in a plane perpendicular to the optical axis. A first reference that enables regulation of rotation, regulation of rotation around an axis parallel to the optical axis, regulation of arrangement in a direction parallel to the optical axis, and regulation of inclination with respect to an axis that should be parallel to the optical axis A portion extending in a first direction that is perpendicular to the optical axis of the optical element portion and perpendicular to the second direction, and is arranged in a second direction in a plane perpendicular to the optical axis, and an axis parallel to the optical axis And a second reference portion that enables regulation of arrangement in a direction parallel to the optical axis and regulation of inclination with respect to an axis that should be parallel to the optical axis. In this case, the first reference portion and the second reference portion, which are convex or concave portions, can be arranged with high accuracy with respect to shift and tilt.

In still another aspect of the present invention, the outer diameter of the optical element portion is 2 mm or less. In this case, the optical element portion becomes relatively small, and positioning using the support shaft portion is effective for optical surface measurement and the like.

In yet another aspect of the present invention, the distal end side gate portion is smoothly connected by an R shape at the boundary between the optical element portion and the support shaft portion. In this case, bending at the distal end side gate portion can be prevented, and release of the optical element portion after molding can be improved.

In still another aspect of the present invention, the distance between the first reference boss and the optical element portion in the direction perpendicular to the optical axis of the optical element portion is L1, and the optical element portion is closer than the first reference boss and the first reference boss. L1 / L2 <1 where L2 is a distance in a direction perpendicular to the optical axis with the second reference boss away from the first reference boss. In this case, it becomes easy to ensure the installation accuracy of the optical element portion.

In still another aspect of the present invention, when the thickness of the optical element portion of the first and second reference bosses in the direction parallel to the optical axis is t1, and the thickness of the support shaft portion in the direction parallel to the optical axis is t2. In addition, t1 / t2 <1. In this case, the protrusions of the first and second reference bosses are relatively small, and the fluidity of the resin can be improved.

In yet another aspect of the present invention, the root side gate portion is connected to the opposite side of the tip side gate portion of the support shaft portion. In this case, the positioning part including the reference boss and the like can be transferred with high accuracy.

In still another aspect of the present invention, the distal end side gate portion extends in a branched manner and has a plurality of optical element portions on the distal end side. In this case, a plurality of optical element portions can be collectively measured. In collective measurement of a plurality of optical element portions, the requirements regarding positioning accuracy become more severe, and therefore, measurement using a positioning portion provided on the support shaft portion becomes more effective.

The method for measuring an optical molded product according to the present invention includes a support shaft portion that supports an optical element portion having an optical function via a tip-side gate portion, and a three-dimensional view of the optical element portion on the support shaft portion. A step of preparing an optical molded product provided with a positioning portion for restricting the proper arrangement and rotation posture in advance, and fixing the positioning portion on a support jig, in a plane perpendicular to the optical axis of the optical element portion A process of regulating the arrangement and regulating the arrangement in a direction parallel to the optical axis, and regulating the rotation around an axis parallel to the optical axis and regulating the inclination with respect to the axis to be parallel to the optical axis; And a step of measuring the characteristics of the optical molded product by setting the support jig on the stage.

According to the above measuring method, since an optical molded product in which a positioning portion is provided in advance on the support shaft portion that indirectly supports the optical element portion is prepared, the optical element portion is fixed by fixing the positioning portion on the support jig. In addition to restricting the position in the plane perpendicular to the optical axis and restricting the position in the direction parallel to the optical axis, restricting the rotation around the axis parallel to the optical axis and the axis to be parallel to the optical axis Tilt regulation can be performed. As a result, even if the optical element portion is small, it can be precisely positioned and arranged at an appropriate position in the measuring device, and the optical surface of the optical element portion can be precisely measured. it can.

In a specific aspect of the present invention, in the above measurement method, when the positioning portion is fixed on the support jig, the first reference boss is brought into contact with the support jig, thereby being perpendicular to the optical axis of the optical element portion. By restricting the arrangement in a plane and bringing the second reference boss into contact with the support jig, by restricting rotation around an axis parallel to the optical axis and bringing the reference plane into contact with the support jig The arrangement in the direction parallel to the optical axis and the inclination with respect to the axis to be parallel to the optical axis are restricted.

In another aspect of the present invention, when fixing the positioning portion on the support jig, a pair of reference bosses extending in the first direction perpendicular to the longitudinal direction of the main body of the support shaft portion and the optical axis of the optical element portion are supported. By making contact with the jig, the arrangement in the second direction perpendicular to the first direction in the plane perpendicular to the optical axis and the rotation around the axis parallel to the optical axis are restricted, and the first reference plane is Arrangement in a direction parallel to the optical axis by restricting the arrangement in the first direction in the plane perpendicular to the optical axis by abutting on the support jig and bringing the second reference plane in contact with the support jig And inclination with respect to an axis that should be parallel to the optical axis.

In yet another aspect of the present invention, when the positioning portion is fixed on the support jig, the first reference portion extending in the second direction parallel to the longitudinal direction of the main body of the support shaft portion is brought into contact with the support jig. Accordingly, the arrangement in the first direction perpendicular to the second direction in the plane perpendicular to the optical axis, the rotation around the axis parallel to the optical axis, the arrangement in the direction parallel to the optical axis, and the parallel to the optical axis. The optical axis is controlled by restricting the inclination with respect to the axis to be, and bringing the second reference portion perpendicular to the optical axis of the optical element portion and extending in the first direction perpendicular to the second direction into contact with the support jig. The arrangement in the second direction in the plane perpendicular to the optical axis, the rotation around the axis parallel to the optical axis, the arrangement in the direction parallel to the optical axis, and the inclination with respect to the axis to be parallel to the optical axis are restricted.

FIG. 1A is a plan view of the optical molded product of the first embodiment, and FIG. 1B is a side view of the optical molded product of FIG. 1A. 1C is a plan view illustrating a state where the optical molded product according to the first embodiment is set on a support jig, and FIG. 1D is a side cross-sectional view illustrating a state where the optical molded product is set on a support jig. It is. It is a figure explaining the state which fixed the support jig | tool which set the optical molded article on the stage for a measurement. It is a conceptual diagram explaining a measurement step. 4A and 4B are cross-sectional views illustrating injection molding of an optical molded product. FIG. 5A is a plan view of the optical molded product of the second embodiment, and FIG. 5B is a side view of the optical molded product of FIG. 5A. FIG. 5C is a plan view illustrating a state where the optical molded product according to the second embodiment is set on a support jig, and FIG. 5D is a side cross-sectional view illustrating a state where the optical molded product is set on a support jig. It is. FIG. 6A is a plan view of the optical molded product of the third embodiment, and FIG. 6B is a side view of the optical molded product of FIG. 6A. FIG. 6C is a plan view illustrating a state where the optical molded product of the third embodiment is set on a support jig, and FIG. 6D is a side cross-sectional view illustrating a state where the optical molded product is set on a support jig. It is. It is a top view explaining the optical molded product of 4th Embodiment.

[First Embodiment]
The optical molded product according to the first embodiment of the present invention will be described with reference to FIGS. 1A and 1B.

The illustrated optical molded product 100 is an integrally molded product made of resin, and includes an optical element portion 10, a support shaft portion 20, a distal end side gate portion 30, and a root side gate portion 40.

The optical element portion 10 is a resin-made small lens, and is used as, for example, an objective lens (specifically, a BD (Blu-ray Disc ™)) lens or an endoscope lens of an optical pickup device. . The optical element portion 10 is finally separated from the support shaft portion 20 by removing the distal end side gate portion 30 by cutting or the like, and becomes an independent product.

The optical element part 10 has an optical part OL having an optical function and an annular outer peripheral part FL extending from the optical part OL in the outer diameter direction. Of the optical element portion 10, the optical part OL has a convex first optical surface OL1 and a convex second optical surface OL2. That is, the optical part OL is thick on the center side. The outer diameter of the optical element portion 10 is, for example, 2 mm or less and is extremely small.

The support shaft portion 20 is a block-shaped portion, and has a larger volume than the optical element portion 10 (specifically, for example, a volume of about 10 to 100 times or more). The support shaft portion 20 includes a main body portion 21, a tapered portion 22, a first reference boss 23, and a second reference boss 24. Of these, the main body portion 21 has a quadrangular prism shape, and includes first to fourth side surfaces 21a to 21d and an end surface 21g. The first side surface 21 a is disposed on the second optical surface OL2 side of the optical element portion 10 and extends perpendicular to the optical axis OA of the optical element portion 10. The second side surface 21b is disposed on the first optical surface OL1 side of the optical element portion 10, and extends perpendicular to the optical axis OA. The third and fourth side surfaces 21c and 21d extend in parallel to the optical axis OA. The tapered portion 22 is a truncated cone-shaped portion in which the cross section perpendicular to the axis AX gradually decreases, and is connected to the distal end side gate portion 30 at the distal end. The first reference boss 23 is a column standing on the tip side on the first side surface 21a and has a cylindrical side surface 23a and a top surface 23b. The second reference boss 24 is a column that is erected on the first side surface 21a and on the base side away from the optical element portion 10, and has a cylindrical side surface 24a and a top surface 24b. The first reference boss 23 and the second reference boss 24 are used for alignment when the optical molded product 100 is fixed to a support jig (see FIG. 2) described later. Of the first side surface 21a, the surface region sandwiched between the first reference boss 23 and the second reference boss 24 is a reference surface R1 for alignment when the optical molded product 100 is fixed to the support jig. It has become. The reference surface R1 is formed on the surface layer portion 21s of the support shaft portion 20 on the first side surface 21a side.

The cylindrical side surface 23a of the first reference boss 23 makes it possible to restrict the arrangement of the optical element portion 10 in the XY plane perpendicular to the optical axis OA of the optical element portion 10. The cylindrical side surface 24a of the second reference boss 24 allows the rotation of the optical element portion 10 to be restricted around the optical axis OA. The reference surface R1 of the surface layer portion 21s enables restriction of the arrangement of the optical element portion 10 in the Z direction parallel to the optical axis OA and restriction of the inclination of the optical element portion 10 with respect to the Z axis parallel to the optical axis OA. .

In the above, the distance between the first reference boss 23 and the optical element portion 10 in the Y direction perpendicular to the optical axis OA is L1, and the first reference boss 23 and the first reference boss 23 are further away from the optical element portion 10. When the distance in the Y direction perpendicular to the optical axis OA with the second reference boss 24 is L2, L1 / L2 <1. That is, the distance between the first reference boss 23 and the second reference boss 24 is relatively wide. Thereby, it becomes easy to ensure the installation accuracy of the optical element portion 10. Further, the thickness of the first and

second reference bosses

23, 24 in the Z direction parallel to the optical axis OA of the optical element portion 10 is t1, and the thickness of the support shaft portion 20 in the Z direction parallel to the optical axis OA is t2. In this case, t1 / t2 <1. Thereby, the protrusions of the first and

second reference bosses

23 and 24 are relatively small, the resin fluidity can be improved, and the first and

second reference bosses

23 and 24 can be easily protruded.

In addition, the diameter of the cross section perpendicular to the optical axis OA of the first reference boss 23 and the second reference boss 24 is sufficiently larger than the diameter of the optical element portion 10. Thereby, the inflow of the resin to the cavity to be the

reference bosses

23 and 24 can be made smooth and reliable.

The front end side gate portion 30 is a neck-shaped portion that connects the optical element portion 10 and the support shaft portion 20, and is a rectangular parallelepiped having four side surfaces. The distal end side gate portion 30 serves as an inlet for guiding the resin to a molding space corresponding to the optical element portion 10 during injection molding. As shown in the enlarged view, the distal end side gate portion 30 is smoothly connected by the R shape in the boundary region A1 with the optical element portion 10, and the R shape in the boundary region A2 with the support shaft portion 20. Is connected smoothly.

The root side gate portion 40 is formed on the root side of the support shaft portion 20, that is, on the opposite side of the tip side gate portion 30. The root side gate part 40 is a rectangular parallelepiped or a cylinder. The distal end side gate portion 30 serves as an inlet for guiding the resin to a molding space such as a resin reservoir corresponding to the support shaft portion 20 or the like during injection molding. The root side gate portion 40 is initially connected to a runner portion RP formed as a portion corresponding to the flow path of the molten resin on the opposite side of the support shaft portion 20, but the runner portion RP is obtained by subsequent cutting or the like. From the base side gate part 40 to the optical element part 10 on the front end side, an integrated optical molded product 100 is obtained.

With reference to FIG. 1C and 1D, the support method of the optical molded product 100 shown to FIG. 1A etc. is demonstrated.

The optical molded product 100 is supported in an aligned state on the support jig 200. The support jig 200 is a flat member and includes a through hole 31, a first positioning hole 32, and a second positioning hole 33. The through hole 31 is a cylindrical hole extending in the z direction. The through-hole 31 has the optical element portion 10 disposed above the center thereof, thereby enabling measurement of the second optical surface OL2 on the back side as well as the measurement of the first optical surface OL1 on the front side of the optical element portion 10. ing. The first positioning hole 32 has a shape in which a part of the cylindrical hole is cut out by the through hole 31. The first positioning hole 32 restricts the arrangement of the optical molded product 100 in the xy plane perpendicular to the optical axis OA by fitting the first reference boss 23 of the optical molded product 100 into the first positioning hole 32. The second positioning hole 33 is a long hole having an oval cross section that is long in the y direction. By fitting the second reference boss 24 of the optical molded product 100 into the second positioning hole 33, the cylindrical side surface 24 a of the second reference boss 24 is sandwiched between the pair of flat surfaces 33 a of the positioning hole 33. Thus, the rotation about the z-axis parallel to the optical axis OA of the optical molded product 100 is restricted. The upper surface 35 of the support jig 200 is a flat surface parallel to the xy plane. The upper surface 35 of the support jig 200 is brought into contact with the reference surface R1 of the optical molded product 100 to thereby arrange the z-direction parallel to the optical axis OA of the optical molded product 100 and the optical axis of the optical molded product 100. The inclination with respect to the z axis parallel to OA is regulated. That is, by setting the optical molded product 100 on the support jig 200, the optical molded product 100 can be shifted in three directions, x, y, and z, and the x, y, and z axes. The posture is adjusted with respect to the three-dimensional tilt around the three axes, and alignment on the support jig 200 of the optical molded product 100 is achieved.

Referring to FIG. 2 and the like, a method for measuring the optical molded product 100 will be described. For the optical molded product 100, the shape of the optical surfaces OL1 and OL2 provided in the optical part OL is measured by the measuring device 300.

The measuring apparatus 300 includes a stage 59 and a main body measuring unit 50, and sets a support jig 200 with the optical molded product 100 attached on the stage 59 during measurement. The stage 59 includes a flat base 41, a block-shaped first locking member 42, a block-shaped second locking member 43, a first pressing member 44 for fixing with an elastic force, and an elastic force. And a second pressing member 46 for fixing. On the support jig 200, three reference spheres 41a are fixed in order to grasp the parallel of the xy plane and the z-direction position. By measuring the positions of the three reference spheres 41a before the optical surface measurement, the posture and position of the optical molded product 100 as the measurement object can be accurately grasped even if the position and inclination of the support jig 200 are changed. be able to. The support jig 200 is pressed against the first and

second locking members

42 and 43 by the biasing member 44a provided on the first pressing member 44, and by the biasing member 46a provided on the second pressing member 46, It is pressed onto the base 41 via an urging position U <b> 1 provided on the support shaft 20 of the optical molded product 100. Thereby, the optical molded product 100 is stably fixed on the stage 59 via the support jig 200. In this state, the main body measurement unit 50 can measure the shape of the optical molded product 100 relating to the first optical surface OL1 and the like.

As shown in FIG. 3, on the first optical surface OL1 provided in the optical molded product 100 supported on the stage 59 shown in FIG. The tip of touches. Here, the initial position of the probe 51 is set to a region near the center within ± D / 4 of all the regions on the first optical surface OL1, where D is the diameter of the first optical surface OL1 of the optical molded product 100. Thus, the shape measurement of the first optical surface OL1 can be ensured. If the initial position of the probe 51 is in the peripheral region of the first optical surface OL1, especially in the case of stylus type measurement, it is difficult to center the probe 51, making it difficult to set the measurement range appropriately. Tend to occur. In the above, the measurement is performed on the first optical surface OL1, but if the optical molded product 100 is turned upside down together with the stage 59 or the support jig 200, the second optical surface OL2 is the same as the first optical surface OL1. It becomes possible to measure.

Hereinafter, the molding die for molding the optical molded product 100 of the embodiment will be described with reference to FIG. 4A and the like.
A molding die 60 shown in FIG. 4A includes a movable die 61 and a fixed die 62. The movable mold 61 is driven by a mold driving unit (not shown) and can move forward and backward in the AB direction, and can be opened and closed with the fixed mold 62. By abutting the movable mold 61 against the fixed mold 62, a mold space CV and a flow path space FC are formed between both the

molds

61 and 62. The mold space CV is for forming the optical element portion 10, the support shaft portion 20, and the distal end side gate portion 30 shown in FIG. 1A. The mold space CV includes a space portion CV1 corresponding to the shape of the optical element portion 10, a space portion CV2 corresponding to the shape of the support shaft portion 20, and the like. The flow path space FC is for supplying resin to the mold space CV, and includes a runner and the like.

In the molding die 60 shown in FIG. 4B, after the injection process of filling the mold space CV with the resin, when the movable die 61 is retracted and the two dies 61 and 62 are separated from each other, an optical molded product is formed on the movable die 61 side. The molded product MP containing 100 remains. Thereafter, by operating an ejector (not shown) provided on the movable mold 61 side, a plurality of ejector pins 65 are ejected, and the first reference boss 23 provided on the support shaft portion 20 in the optical molded product 100. And the second reference boss 24 are pushed out. By projecting the

reference bosses

23 and 24 in this way, the optical molded product 100 can be released in a balanced manner, and distortion and deformation of the first side surface 21a, the cylindrical side surfaces 23a and 24a, etc. can be suppressed, and optical molding is performed. The product 100 can be manufactured with high shape accuracy. In addition, the movable mold 61 and the fixed mold 62 that form the optical molded product 100 are formed by an integral mold portion of the molded product MP. Thereby, the optical element part 10 and the spindle part 20 which comprise the optical molded article 100 can be shape | molded with high precision, maintaining those arrangement | positioning relationships. That is, the optical element portion 10 can be precisely positioned in the same manner by precisely positioning the support shaft portion 20.

As described above, according to the optical molded product 100 of the first embodiment, the first and

second reference bosses

23 and 24 and the reference surface R1 are provided on the support shaft portion 20 as positioning portions. The first and

second reference bosses

23 and 24 and the reference plane R1, which are positioning parts, regulate the position in the XY plane perpendicular to the optical axis OA and the regulation of the position in the Z direction parallel to the optical axis OA. As well as restricting rotation about an axis parallel to the optical axis OA and restricting inclination with respect to the axis that should be parallel to the optical axis OA. The three-axis tilt can be arranged with high accuracy. Thereby, even if the optical element portion 10 is small, it can be precisely positioned and arranged at an appropriate position in the measuring device, and the optical surface of the optical element portion 10 can be precisely measured. be able to.

[Second Embodiment]
The optical molded product of the second embodiment will be described with reference to FIGS. 5A and 5B. The optical molded product or the like of the second embodiment is a modification of the optical molded product or the like of the first embodiment, and matters not specifically described are the same as those of the first embodiment.

As shown in FIG. 5A and the like, the optical molded product 100 includes an optical element portion 10, a support shaft portion 20, a distal end side gate portion 30, and a root side gate portion 40.

The support shaft portion 20 includes a main body portion 21, a tapered portion 22, and a pair of

reference bosses

523 and 524. Of these, the main body portion 21 has a quadrangular prism shape, and includes first to fourth side surfaces 21a to 21d and an end surface 21g. One reference boss 523 of the pair of

reference bosses

523 and 524 is a quadrangular columnar member provided so as to extend in the −X direction from the third side surface 21c, and has a side surface 523a. The other reference boss 524 is a quadrangular prism-shaped member provided so as to extend in the + X direction from the fourth side surface 21d, and has a side surface 524a. The pair of

reference bosses

523 and 524 are used for alignment when the optical molded product 100 is fixed to a support jig described later.

Of the first side surface 21a of the support shaft portion 20, the surface region on the center side in the Y direction serves as a reference surface R1 for alignment when the optical molded product 100 is fixed to a support jig described later. . The reference surface R1 is formed on the surface layer portion 21s of the support shaft portion 20 on the first side surface 21a side. In addition, a part of the surface region adjacent to the −Y direction of one reference boss 524 in the fourth side surface 21d is a reference surface R2 for alignment when the optical molded product 100 is fixed to a support jig described later. It has become. The reference surface R2 is formed on the surface layer portion 21t on the fourth side surface 21d side of the support shaft portion 20. Of the

side surfaces

523a and 524a of the pair of

reference bosses

523 and 524, the surface region on the −Y side is a reference surface R3 for alignment when the optical molded product 100 is fixed to a support jig described later. The reference surface R3 is formed on the surface portion 21u on the −Y side of the pair of

reference bosses

523 and 524.

In the above-described support shaft portion 20, the −Y

side side surfaces

523a and 524a of the pair of

reference bosses

523 and 524, that is, the reference surface R3, are restricted in rotation around the Z axis parallel to the optical axis OA and the optical axis OA. It is possible to restrict the arrangement in the Y direction (second direction) perpendicular to the X direction (first direction) in the XY plane perpendicular to. The reference surface (second reference surface) R1 of the surface layer portion 21s is a restriction of the arrangement of the optical element portion 10 in the Z direction parallel to the optical axis OA and the inclination of the optical element portion 10 with respect to the Z axis parallel to the optical axis OA. Enable regulation. The reference surface (first reference surface) R2 of the surface layer portion 21t enables restriction of arrangement in the X direction (first direction) in the XY plane perpendicular to the optical axis OA.

With reference to FIG. 5C and 5D, the support method of the optical molded product 100 shown to FIG. 5A etc. is demonstrated.
The optical molded product 100 is supported in an aligned state on the support jig 200. The support jig 200 includes a main body portion 39 that is a flat member, a first positioning protrusion 37, and a second positioning protrusion 38. A through hole 31 is formed in the main body portion 39 to enable measurement of both optical surfaces OL1 and OL2 of the optical element portion 10. The first and

second positioning protrusions

37 and 38 are cylindrical members that protrude in the z direction above the upper surface 35 of the main body portion 39. The first and

second positioning projections

37 and 38 are brought into contact with the reference surface R3 of the pair of

reference bosses

523 and 524 of the optical molded product 100, whereby the z-axis is parallel to the optical axis OA of the optical molded product 100. And the arrangement of the optical molded product 100 with respect to the y direction (second direction) in the xy plane perpendicular to the optical axis OA. The arrangement of the second positioning protrusion 38 is restricted with respect to the x direction (first direction) in the xy plane perpendicular to the optical axis OA of the optical molded product 100 by bringing the reference positioning surface R2 of the optical molded product 100 into contact therewith. To do. The upper surface 35 of the main body portion 39 is brought into contact with the reference surface R1 of the optical molded product 100 to thereby arrange the z-direction parallel to the optical axis OA of the optical molded product 100 and the optical axis OA of the optical molded product 100. The inclination with respect to the z-axis parallel to is regulated. That is, by setting the optical molded product 100 on the support jig 200, the optical molded product 100 can be shifted in three directions of x, y, and z, and the x, y, and z axes. The posture is adjusted with respect to the three-dimensional tilt around the three axes, and alignment on the support jig 200 of the optical molded product 100 is achieved.

When the support jig 200 is fixed to a stage similar to the stage 59 shown in FIG. 2, the support shaft portion 20 is urged in the + z direction using the urging position U <b> 1 provided on the support shaft portion 20. Further, the biasing position U21 of the pair of

reference bosses

523 and 524 extending from the support shaft portion 20 is biased in the −y direction, and the biasing position U23 of the reference boss 523 is biased in the + x direction.
The pair of

reference bosses

523 and 524 provided in the optical molded product 100 can be projected when the optical molded product 100 which is a molded product is released.

According to the optical molded product 100 of the second embodiment, the pair of reference bosses 523 and 524 (reference surface R3) and the reference surfaces R1 and R2 are provided on the support shaft portion 20 as positioning portions. The

reference bosses

523 and 524 and the reference planes R1 and R2 which are positioning portions enable restriction of the position in the XY plane perpendicular to the optical axis OA and restriction of the position in the Z direction parallel to the optical axis OA. At the same time, the rotation around the axis parallel to the optical axis OA and the inclination with respect to the axis that should be parallel to the optical axis OA can be restricted. It becomes possible to arrange with high accuracy with respect to tilt. Thereby, even if the optical element portion 10 is small, it can be precisely positioned and arranged at an appropriate position in the measuring device, and the optical surface of the optical element portion 10 can be precisely measured. be able to.

[Third Embodiment]
With reference to FIGS. 6A and 6B, an optically molded product of the third embodiment will be described. The optical molded product or the like of the third embodiment is a modification of the optical molded product or the like of the first embodiment, and matters not specifically described are the same as those of the first embodiment.

As shown in FIG. 6A and the like, the optical molded product 100 includes an optical element portion 10, a support shaft portion 20, a distal end side gate portion 30, and a root side gate portion 40.

The support shaft portion 20 is a columnar first reference portion 27 extending in the Y direction (second direction) parallel to the longitudinal direction of the support shaft portion 20, and is perpendicular to the optical axis OA of the optical element portion 10 and is second. And a cylindrical second reference portion 28 extending in the X direction (first direction) perpendicular to the direction. The first reference portion 27 has a side surface 27a. The second reference portion 28 has a side surface 28a. Of the side surfaces 27a and 28a, the

surface portions

27v and 28v are portions that come into contact with first and

second positioning grooves

72 and 73 described later, and are semi-cylindrical surfaces. The first and

second reference portions

27 and 28 are used for alignment when the optical molded product 100 is fixed to a support jig described later.

Of the side surface 27a of the first reference portion 27, the side surface portion of the surface portion 27v on the + Z side is parallel to the optical axis OA and the arrangement restriction in the X direction (first direction) in the XY plane perpendicular to the optical axis OA. It is possible to restrict the rotation around the Z axis, restrict the arrangement in the Z direction parallel to the optical axis OA, and restrict the inclination with respect to the Z axis parallel to the optical axis OA. Of the side surface 28a of the second reference portion 28, the side surface portion of the surface portion 28v on the + Z side is parallel to the optical axis OA and the arrangement restriction in the Y direction (second direction) in the XY plane perpendicular to the optical axis OA. It is possible to restrict the rotation around the Z axis, restrict the arrangement in the Z direction parallel to the optical axis OA, and restrict the inclination with respect to the Z axis parallel to the optical axis OA.

With reference to FIG. 6C and 6D, the support method of the optical molded product 100 shown to FIG. 6A etc. is demonstrated.
The optical molded product 100 is supported in an aligned state on the support jig 200. The support jig 200 is a flat plate-like member, and includes a through hole 31, a first positioning groove 72, and a second positioning groove 73. The first positioning groove 72 is a groove having a V-shaped cross section that linearly extends in the y direction along the upper surface 35 of the support jig 200. The first positioning groove 72 is arranged in the x direction (first direction) in the xy plane perpendicular to the optical axis OA of the optical molded product 100 by guiding the first reference portion 27 of the optical molded product 100 to the first positioning groove 72. The rotation about the z axis parallel to the optical axis OA, the arrangement in the z direction parallel to the optical axis OA, and the inclination with respect to the z axis parallel to the optical axis OA are restricted. The second positioning groove 73 is a groove having a V-shaped cross section that linearly extends in the x direction along the upper surface 35 of the support jig 200. The second positioning groove 73 guides the second reference portion 28 of the optical molded product 100 to the second positioning groove 73, thereby disposing the second positioning groove 73 in the y direction (second direction) in the xy plane perpendicular to the optical axis OA of the optical molded product 100. The rotation about the z axis parallel to the optical axis OA, the arrangement in the z direction parallel to the optical axis OA, and the inclination with respect to the z axis parallel to the optical axis OA are restricted. That is, the first and

second positioning grooves

72 and 73 cooperate in restricting the rotation around the z axis parallel to the optical axis OA and restricting the arrangement in the z direction parallel to the optical axis OA. In addition, the first and

second positioning grooves

72 and 73 also cooperate in restricting the inclination of the optical molded product 100 with respect to the z axis parallel to the optical axis OA. In this way, by setting the optical molded product 100 on the support jig 200, the optical molded product 100 can have a three-dimensional shift in three directions of x, y, and z, and the x-axis, y-axis, and The posture is adjusted with respect to the three-dimensional tilt around the three axes of the z axis, and the alignment of the optical molded product 100 on the support jig 200 is achieved.

When the support jig 200 is fixed to a stage similar to the stage 59 shown in FIG. 2, the support shaft portion 20 is urged in the + z direction using the urging positions U1 and U3 provided on the support shaft portion 20. .

According to the optical molded product 100 of the third embodiment, the first reference portion 27 and the second reference portion 28 are provided on the support shaft portion 20 as positioning portions. The first and

second reference portions

27 and 28 which are positioning portions enable restriction of the position in the XY plane perpendicular to the optical axis OA and restriction of the position in the Z direction parallel to the optical axis OA. Since it is possible to restrict the rotation around an axis parallel to the optical axis OA and to restrict the inclination with respect to the axis that should be parallel to the optical axis OA, the optical element portion 10 is related to a three-dimensional shift and a three-axis tilt. It becomes possible to arrange with high accuracy. Thereby, even if the optical element portion 10 is small, it can be precisely positioned and arranged at an appropriate position in the measuring device, and the optical surface of the optical element portion 10 can be precisely measured. be able to.

[Fourth Embodiment]
With reference to FIG. 7, the optical molded product of the fourth embodiment will be described. The optical molded product or the like of the fourth embodiment is a modification of the optical molded product or the like of the first embodiment, and matters not specifically described are the same as those of the first embodiment.

As shown in the figure, the optical molded product 100 includes four optical element portions 10, a support shaft portion 20, a tip side gate portion 30, and a root side gate portion 40. Here, the four optical element portions 10 have the same shape and are supported by a branch portion 80 extending from the distal end side gate portion 30. That is, the branch part 80 has a shape that branches into four on the tip side.

As in the present embodiment, a branch portion 80 that branches off from the distal end side gate portion 30 is provided, and the optical element portion 10 is formed at each distal end of the branch portion 80, whereby a plurality of optical element portions 10 are collectively collected. Can be formed and measured. In the collective measurement of the plurality of optical element portions 10, since the requirements regarding the positioning accuracy become more severe, the measurement using the positioning portions (the first and

second reference bosses

23 and 24 and the reference surface R <b> 1) provided on the support shaft portion 20. Becomes more effective.

As described above, the present invention has been described according to the embodiment. However, the present invention is not limited to the above embodiment, and for example, the following modifications are possible. That is, the

reference bosses

23 and 24 that are positioning portions provided on the support shaft portion 20 are convex portions, but the positioning portion is a concave portion and a convex portion is provided on the support jig 200 for alignment. You can also

Further, in the first embodiment, for example, the second reference boss 24 among the

reference bosses

23 and 24 which are positioning portions is not limited to a circular cross-section cylinder, but may be a quadrangular prism having a quadrangular cross section. In the second embodiment, the

reference bosses

523 and 524 serving as positioning portions are not limited to quadrangular columns with a quadrangular cross section but may be circular cylinders with a circular cross section. Further, in the third embodiment, the first and

second reference portions

27 and 28 that are positioning portions are not limited to a columnar shape, and are appropriately changed such that the surfaces other than the semi-cylindrical side surfaces 27a and 28a are made flat. You can also.

Claims

An optical element portion having an optical function;
A spindle,
An optical molded article comprising a tip side gate portion disposed between the optical element portion and the support shaft portion,
The support shaft portion has a positioning portion for regulating the three-dimensional arrangement and rotation posture of the optical element portion,
The positioning portion enables restriction of arrangement in a plane perpendicular to the optical axis of the optical element portion and restriction of arrangement in a direction parallel to the optical axis, and around the axis parallel to the optical axis. An optical molded product that enables regulation of rotation and regulation of inclination with respect to an axis that should be parallel to the optical axis.
2. The optical molded product according to claim 1, wherein the positioning portion includes a convex or concave portion protruding around the support shaft portion.
The positioning portion includes a first reference boss that allows the arrangement of the optical element portion in a plane perpendicular to the optical axis to be restricted, and a second that enables the rotation to be restricted about an axis parallel to the optical axis. The optical molded product according to claim 2, comprising a reference boss and a reference surface that enables restriction of arrangement in a direction parallel to the optical axis and restriction of inclination with respect to an axis that should be parallel to the optical axis.
4. The optical molded product according to claim 3, wherein the reference surface is formed between the first reference boss and the second reference boss and around the main body of the support shaft portion.
The positioning portion extends in a first direction perpendicular to the longitudinal direction of the main body of the support shaft portion and the optical axis of the optical element portion, and a second perpendicular to the first direction in a plane perpendicular to the optical axis. A pair of reference bosses that enable restriction of arrangement in the direction and restriction of rotation around an axis parallel to the optical axis, and restriction of arrangement in the first direction in a plane perpendicular to the optical axis And a second reference surface that enables restriction of arrangement in a direction parallel to the optical axis and restriction of inclination with respect to an axis that should be parallel to the optical axis. The optical molded product described.
The optical molded product according to claim 5, wherein the first and second reference surfaces are formed between the pair of reference bosses and around the main body of the support shaft portion.
3. The optical molded product according to claim 2, wherein the reference boss has a circular or square cross section with respect to a protruding direction.
3. The optical molded product according to claim 2, wherein the reference boss has a cross section larger than an outer diameter of the optical element portion in a protruding direction.
3. The optical molded product according to claim 2, wherein the reference boss is used for protruding the support shaft portion.
The positioning portion extends in a second direction parallel to the longitudinal direction of the main body of the support shaft portion, and restricts the arrangement in the first direction perpendicular to the second direction in a plane perpendicular to the optical axis; A first reference part that enables regulation of rotation around an axis parallel to the optical axis, regulation of arrangement in a direction parallel to the optical axis, and regulation of inclination with respect to an axis that should be parallel to the optical axis; , Extending in a first direction perpendicular to the optical axis of the optical element portion and perpendicular to the second direction, and restricting the arrangement in the second direction in a plane perpendicular to the optical axis; A second reference part that enables regulation of rotation around a parallel axis, regulation of arrangement in a direction parallel to the optical axis, and regulation of inclination with respect to an axis that should be parallel to the optical axis, The optical molded product according to claim 2.
The optical molded product according to claim 1, wherein an outer diameter of the optical element portion is 2 mm or less.
2. The optical molded product according to claim 1, wherein the tip side gate portion is smoothly connected by an R shape at a boundary portion between the optical element portion and the support shaft portion.
The distance between the first reference boss and the optical element portion in the direction perpendicular to the optical axis of the optical element portion is L1, and the distance between the first reference boss and the first reference boss is more distant from the optical element portion. 5. The optically molded product according to claim 3, wherein L1 / L2 <1 when L2 is a distance in a direction perpendicular to the optical axis with respect to the second reference boss.
When the thickness of the first and second reference bosses in the direction parallel to the optical axis of the optical element portion is t1, and the thickness of the support shaft portion in the direction parallel to the optical axis is t2, t1 / t2 < The optical molded product according to claim 3, which is 1.
The optical molded product according to claim 1, wherein a root-side gate portion is connected to the opposite side of the tip-side gate portion of the support shaft portion.
2. The optical molded product according to claim 1, wherein the tip side gate portion extends in a branched manner and has a plurality of optical element portions on the tip side.
Positioning for restricting the three-dimensional arrangement and rotation posture of the optical element portion on the support shaft portion having a support shaft portion for supporting the optical element portion having an optical function via the tip side gate portion A step of preparing an optical molded product provided with a part in advance;
By fixing the positioning portion on a support jig, the arrangement of the optical element portion in a plane perpendicular to the optical axis and the arrangement in a direction parallel to the optical axis are regulated, and the optical axis Restricting rotation about an axis parallel to the optical axis and restricting inclination with respect to an axis to be parallel to the optical axis;
A method of measuring an optical molded product comprising: measuring the characteristics of the optical molded product by setting the support jig on a stage.
When fixing the positioning portion on the support jig, the first reference boss is brought into contact with the support jig, thereby restricting the arrangement of the optical element portion in a plane perpendicular to the optical axis. 2 The reference boss is brought into contact with the support jig to restrict rotation around an axis parallel to the optical axis, and the reference plane is brought into contact with the support jig to make it parallel to the optical axis. The method for measuring an optical molded article according to claim 17, wherein the arrangement of directions and the inclination with respect to an axis to be parallel to the optical axis are restricted.
When fixing the positioning portion on the support jig, a pair of reference bosses extending in the first direction perpendicular to the longitudinal direction of the main body of the support shaft portion and the optical axis of the optical element portion are used as the support jig. By abutting, the arrangement in the second direction perpendicular to the first direction in the plane perpendicular to the optical axis and the rotation around the axis parallel to the optical axis are restricted, and the first reference plane is The arrangement in the first direction in the plane perpendicular to the optical axis is regulated by contacting the support jig, and the optical axis is brought into contact with the second reference plane by contacting the support jig. The method for measuring an optical molded product according to claim 17, wherein arrangement in a parallel direction and inclination with respect to an axis to be parallel to the optical axis are restricted.
When the positioning part is fixed on the support jig, the first reference part extending in a second direction parallel to the longitudinal direction of the main body of the support shaft part is brought into contact with the support jig, whereby the light An arrangement in a first direction perpendicular to the second direction in a plane perpendicular to the axis, a rotation around an axis parallel to the optical axis, an arrangement in a direction parallel to the optical axis, and a parallel to the optical axis By restricting the inclination with respect to the axis to be, and bringing a second reference portion extending in a first direction perpendicular to the optical axis of the optical element portion and perpendicular to the second direction into contact with the support jig , Arrangement in the second direction in a plane perpendicular to the optical axis, rotation around an axis parallel to the optical axis, arrangement in a direction parallel to the optical axis, and parallel to the optical axis The method for measuring an optical molded product according to claim 17, wherein the inclination with respect to the axis is regulated.