CN101665321B - Monolithic glass molded composite lens and method of manufacturing the same - Google Patents

Abstract

The invention relates to a composite lens of whole glass molding and a manufacturing method thereof, the composite lens of whole glass molding comprises: a first sheet body made of a first glass material having a glass transition temperature, the first sheet body having a top surface, a bottom surface, a plurality of first optical elements formed between the top and bottom surfaces along a plurality of cutting directions and arranged in a plurality of sets, the first optical elements having first bonding surface portions, respectively; and a plurality of second optical elements respectively made of a plurality of second glass materials, each second glass material has a forming temperature less than or equal to the glass transition temperature, and the second optical elements respectively have second joint surface parts fused on the first joint surface parts. The whole glass molding composite lens can absorb chromatic aberration.

Description

Monolithic glass molded composite lens and method of manufacturing the same

technical field

The present invention relates to an optical element, and more particularly, to a monolithic glass molded composite lens and its manufacturing method.

Background technique

In the known molding technology of optical glass elements, the mold cavity of a single mold is often used to form a single optical glass element, or a single mold with multiple mold cores is used to form a plurality of independent optical glass elements. A single optical glass element is formed from a single glass material preform. Its main defect is that the processing of a single glass material preform increases the manufacturing cost of optical glass elements; at the same time, these known technologies are not easy to manufacture tiny optical elements, such as tiny optical lenses (MicroLens), tiny optical lens arrays ( Micro Lens Array), etc., cannot effectively increase production and reduce production costs.

In US Patent Application Publication No. US2003/0115907A1, a multi-lens molding system and method are disclosed, which can be used to manufacture multiple optical elements at the same time. Referring to FIG. 1, in this method, a forming mold 13 having a plurality of glass molding surfaces is used, and a preform 15 of flat glass material is pressed onto the forming mold 13 and heated and pressurized to form the forming mold. A plurality of forming surfaces on 13 are transferred onto a preform 15 of flat glass material to form a glass substrate having a plurality of optical elements. Cutting is then performed to obtain multiple optical elements. Although this technology can use the preform 15 of simple flat glass material to carry out the glass molding of optical elements or tiny optical elements, it has mass production and can reduce production costs, but its mold manufacturing is relatively complicated, and, when a single When an optical element is separated from a glass substrate with multiple optical elements, it is difficult to control its dimensional accuracy, and it is difficult to obtain a higher-precision optical glass element.

As we all know, in the known technology, in order to effectively reduce chromatic aberration, a composite lens formed by bonding two different lenses is added to the optical system. Coat the surface of the first lens with an adhesive, then cover the second lens, adjust the position of the two lenses so that the optical axes of the two are coaxial, and heat or irradiate the adhesive with UV rays (Ultraviolet Rays) , UV) and other methods to be cured. After curing the adhesive will join the two lenses together to obtain the desired composite lens.

The two lenses need to be ground or molded first, and then go through the centering process to define their outer diameter and eccentricity before proceeding to the bonding process. Therefore, individual independent optical lenses are prone to eccentricity and deterioration during the bonding process, which must be changed. The relative position of the lens can only be bonded after being adjusted and corrected.

In addition, after the adhesive is cured, an interface will be formed between two optical lenses. Due to the impact of this interface, the composite lens cannot fully improve the effect of chromatic aberration.

Adhesives are usually formed of high-substances, so the interface formed after curing is prone to deterioration in future use and has poor durability. Moreover, the thermal expansion rate of the interface is greatly different from that of the two lenses, which is easily affected by thermal expansion, and may cause damage and peeling in future use.

Contents of the invention

The technical problem to be solved by the present invention is to provide a whole-piece lens molding technology that can only manufacture single-piece lenses with low precision, and bonded composite lenses are easily affected by adhesives. The glass molded composite lens and its manufacturing method can form a whole glass molded composite lens in the molding process, avoiding the influence of adhesives.

The technical solution adopted by the present invention to solve the technical problem is to construct a monolithic glass molded composite lens, comprising:

The first sheet is made of a first glass material, the first glass material has a glass transition temperature, the first sheet has a top surface, a bottom surface, and a plurality of cutting directions are formed between the top and bottom surfaces. First optical elements arranged in multiple groups, the first optical elements respectively have first bonding surfaces; and

A plurality of second optical elements are respectively made of a plurality of second glass materials, each second glass material has a forming temperature less than or equal to the glass transition temperature of the first glass material, and the second optical elements have melting The second joint surface rests on the first joint surface.

In the integral glass molded composite lens of the present invention, an alignment mark is further included, located on at least one of the top and bottom surfaces of the first sheet along any cutting direction.

In the monolithic glass molded composite lens of the present invention, the first joint surface of the first optical component and the second joint surface of the second optical component are both spherical or aspherical.

In the monolithic glass molded composite lens of the present invention, the first optical elements are formed between the top and bottom surfaces along two mutually perpendicular cutting directions and are arranged in multiple groups.

In the monolithic glass molded composite lens of the present invention, the cross section of the first sheet is circular, and the alignment mark is located on the center line of the first sheet and is symmetrical to the first sheet center of.

The present invention also provides a method for manufacturing a monolithic glass molded composite lens, comprising:

(A) forming the first glass material into a first sheet, the first glass material has a glass transition temperature, the first sheet has a top surface, a bottom surface, and a plurality of cutting directions are formed between the top and bottom surfaces and the first optical elements arranged in multiple groups, the first optical elements each have a first bonding surface; and

(B) Simultaneously molding a plurality of second glass materials on the first bonding surface of the first optical element to form a plurality of second optical elements, each second glass material having a forming temperature less than or equal to the glass transition temperature , the second optical element respectively has a second bonding surface fused to the first bonding surface.

In the method for manufacturing a monolithic glass molded composite lens according to the present invention, in the step [A], at least one pair of positive marks are arranged on one of the top and bottom surfaces along one of the cutting directions.

In the manufacturing method of the monolithic glass molded composite lens according to the present invention, it further comprises a step (C) after the step (B), in the step (C), the first optical lens is cut along the cutting direction Components are cut and separated.

In the method for manufacturing a monolithic glass molded composite lens according to the present invention, both the first joint surface of the first optical component and the second joint surface of the second optical component are spherical, or both are aspherical .

In the method for manufacturing a monolithic glass molded composite lens according to the present invention, in the step (A), the cross section of the first sheet is circular, and the alignment mark is located on the first sheet and symmetrical to the center of the first sheet.

The implementation of the monolithic glass molded composite lens and its manufacturing method of the present invention has the following beneficial effects: In the two-stage forming process, the monolithic glass molded composite lens is formed by using glass materials with large differences in Tg points. In the same mold cavity, glass lenses formed under pressure at different stages can still be tightly bonded together without the aid of any adhesive material due to surface reaction or fusion phenomenon, and the two lenses have a common shape at the interface surface, to achieve the effect of color difference. In addition, on a substrate containing a plurality of optical elements, a precision alignment and cutting process is performed by aligning marks, which improves yield and manufacturing accuracy.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

1 is a cross-sectional view of a mold for molding a plurality of single lenses in the prior art;

Fig. 2 is the schematic diagram of mold group of the present invention;

Fig. 3 is a cross-sectional view of the mold set and the first sheet before the first sheet of the present invention is formed in the first stage;

Fig. 4 is a cross-sectional view of the mold set and the first sheet when the first sheet of the present invention is formed in the first stage;

5 is a cross-sectional view of the mold set, the glass preform, and the first sheet before the glass molded composite lens of the present invention is formed in the second stage;

6 is a cross-sectional view of the mold set, the glass preform, and the first sheet when the glass molded composite lens of the present invention is formed in the second stage;

7 is a cross-sectional view of a monolithic glass molded composite lens array substrate of the present invention;

8 is a cross-sectional view of a single monolithic glass molded composite lens separated from the monolithic glass molded composite lens array substrate shown in FIG. 7. FIG.

9 is a schematic diagram of separating a single monolithic glass molded composite lens from the monolithic glass molded composite lens array substrate;

10 is a cross-sectional view of a single monolithic glass molded composite lens separated from a monolithic glass molded composite lens array substrate.

Detailed ways

Figure 2 is a schematic diagram of the die set of the present invention. Referring to FIG. 2, the mold set is used to form an array of optical elements to obtain, for example, optical lenses (Optical Lens), micro lenses (Micro Lens), micro lens arrays (Micro Lens Array) or diffractive optical elements (Diffractive Optical Element). The mold set 100 includes a plurality of forming mold cores 101 arranged in a specific regular array, and a plurality of alignment marking mold cores 102, and the cross section of the mold 100 may be circular or square.

The directions of rows and columns in which the forming mold cores 101 are arranged in the figure are respectively defined as X and Y directions, and these two directions are also the cutting directions of the formed optical element array substrate. The centers of the plurality of forming die cores 101 are equally spaced in the X direction, all of which are A, and the centers of the plurality of forming die cores 101 are equally spaced in the Y direction, all of which are B. The mold core center distance A in the X direction and the mold core center distance B in the Y direction can be equal or unequal, which is determined according to the appearance of the final optical element. A and B are not equal when the final optic is rectangular; A and B are equal when the final optic is square.

A plurality of alignment mark cores 102 are arranged at the center and two sides of the mold set 100 . The number of them can be, for example, two, and they are arranged on both sides of the center of the mold set 100 respectively. The arrangement pitch of the alignment mark die cores 102 may be the same as or different from the pitch of the above-mentioned forming die cores 101 . However, the alignment marking cores 102 need to be arranged on the centerline of the mold set 100 , and the distances between the alignment marking cores 102 are equal and symmetrical about the center of the mold set 100 . In addition, the forming cores 101 are uniformly and symmetrically arranged on both sides of the alignment mark core 102 .

The outer diameter of the forming core 101 or the optically effective diameter of the final optical element has a pitch C in the X direction, and a pitch D in the Y direction. After obtaining the final optical element array substrate, cutting will be performed along the part between the effective diameters of the two optical elements to separate them from each other. C and D may or may not be equal depending on the appearance of the final optic. C and D are not equal when the final optic is rectangular; C and D are equal when the final optic is square.

Since the adjacent optical elements need to be cut with a diamond whetstone cutter, the distance C of the outer diameter of the forming die core 101 in the X direction and the distance D in the Y direction must be greater than the thickness of the diamond whetstone blade, generally 100~500μm.

After the mold set 100 is assembled, a surface protection coating process is applied to the coating surface in the direction of the molding surface of the mold core to form a protective layer on the molding surface of the mold core. The protective layer can be, for example, a diamond film, a carbon plastic film, a diamond-like carbon film, or a metal or compound containing one or more of Pt, Ir, Re, Ru, Cr, Ni, Al, Ti, W, Mo film.

Fig. 3 is a cross-sectional view of the mold set and the first sheet before the first sheet is formed in the first stage of the present invention. As shown in FIG. 3 , the upper mold set 100 and the lower mold set 200 are disposed opposite to each other. The upper mold set 100 includes a plurality of forming die cores 101 , a plurality of alignment marking die cores 102 , and a fixed platen 104 as described above. Similarly, the lower die set 200 includes a plurality of forming die cores 201 , a plurality of alignment mark die cores 202 , and a fixed platen 204 . The first sheet 300 is made of a first glass material and is located between the upper mold set 100 and the lower mold set 200 . The upper mold set 100 and the lower mold set 200 respectively have core forming surfaces 103 and 203 for forming the top surface and the bottom surface of the first sheet body 300 respectively.

The mold core forming surfaces 103, 203 can both be convex, and in this case the two surfaces of the obtained first optical element are concave surfaces; the mold core forming surfaces 103, 203 can also be one of which is convex and the other is concave; In this case, one side of the obtained first optical element is concave, and the other side is convex. In addition, the mold core forming surfaces 103, 203 can be spherical or aspherical, and their sizes can also be different. These can be changed on request.

In the same arrangement direction, the forming die core 101 and the forming die core 201 have the same distance E between centers. Fig. 3 is a cross-section taken along the Y direction in Fig. 2, where E and B are equal. And, the arrangement mode of forming die core 101 and forming die core 201 adopts a one-to-one manner up and down, to ensure that each forming die core 101 and alignment marking die core 102 of the upper die set 100 can be aligned with each of the lower die set 200. The central axes of the forming die core 201 and the alignment marking die core 202 coincide.

Before molding, the first piece 300 is placed in the center of the mold cavity. When a convex optical element needs to be formed on the first sheet body 300, the corresponding forming mold core is concave. In order to avoid residual gas in the concave forming die core, vacuum treatment must be applied before forming. There is no doubt about air bubbles remaining in the forming of concave optical elements, so it is generally not necessary to apply vacuum treatment.

The cross-sectional shape of the first sheet 300 is circular or square, depending on the shape or design of the mold sets 100 and 200 .

Fig. 4 is a cross-sectional view of the upper and lower mold sets 100, 200 and the first sheet 300 when the first sheet is formed in the first stage of the present invention. Referring to FIG. 4 , the first sheet 300 has a top surface 304 and a bottom surface 305 . The upper and lower mold sets 100, 200 clamp the first sheet 300 in between, and when forming, for example, resistive or infrared heating is used to directly or indirectly heat the upper and lower mold sets 100, 200 and the first sheet 300 . When the temperature reaches the softening point of the first sheet 300 or the molding temperature close to the softening point, move the upper mold set 100 to move downward; Appropriate forming pressure is applied until the desired thickness is achieved, then cooled and removed. At this time, the forming mold cores 101, 201 of the upper and lower mold sets 100, 200 form a plurality of first optical elements 301 between the top surface and the bottom surface of the first sheet 300, and the plurality of first optical elements 301 are formed along the cutting edge. The directions X and Y are arranged in multiple groups, on which the first bonding surface 306 is formed. At the same time, the marks of the alignment mark cores 102 , 202 are also transferred onto the first sheet 300 , forming the first sheet 300 containing the alignment marks 302 , 303 . The first sheet 300 includes four alignment marks, wherein two alignment marks 302 are arranged on the top surface 304 of the first sheet 300 along one cutting direction of X or Y; A cutting direction of X or Y is set on the bottom surface 305 of the first sheet 300 . The forming of the first stage is completed.

Referring to FIG. 5 and FIG. 6 , in the forming process of the second stage, a plurality of second optical elements will be formed on the first sheet 300 to form a monolithic glass molded composite lens array substrate. After aligning the first sheet 300 obtained in the first stage of molding with the alignment mark 303, it is placed in the mold cavity, and a plurality of glass preforms 500 of the second glass material are placed in the first glass material formed by the first glass material. On the first bonding surface 306 of the body 300 . They are sandwiched using upper die set 800, lower die set 200. In the embodiment shown in FIG. 5 and FIG. 6 , the upper die set 800 includes a plurality of forming die cores 801 , a plurality of alignment marking die cores 802 , and a fixed platen 804 . The upper mold set 800 forms one side of the glass preform 500 made of the second glass material into a convex surface, so the mold core forming surface 803 thereof is concave. This can be accomplished by changing the forming die core 101 or replacing the die set.

The difference between the first sheet 300 of the first glass material and the glass preform 500 of the second glass material is that the glass transition temperature (Glass Transformation Point, Tg point, glass viscosity of about 10 ¹² poise) of the two materials is quite different , and the glass transition temperature (Tg point) of the first glass material must be greater than or equal to the softening point temperature (Soft Point, SP point, glass viscosity of about 10 ^7.6 poise) of the second glass material. The forming temperature of the second glass material is between its softening point temperature and its drop point temperature, and the forming temperature of the second glass material is less than or equal to its softening temperature but greater than its drop point temperature. In the molding process, the first optical element of the first glass material is shaped in the first stage of shaping; and then the second optical element of the second glass material is shaped in the second stage of shaping.

Afterwards, the upper mold set 800 , the lower mold set 200 , and the glass preform 500 made of the second glass material are directly or indirectly heated using, for example, resistance heating or infrared heating. The heating temperature is not higher than the Tg point of the first sheet 300 made of the first glass material. This is because the heating will not cause deformation of the first sheet 300 formed earlier and can maintain its proper shape during molding. surface shape and surface condition. When the temperature reaches the softening point of the glass preform 500 of the second glass material or the forming temperature close to its softening point, move the upper mold group 100 to move downward, or move the lower mold group 200 to move upward, and the glass preform 500 Appropriate forming pressure is applied until the desired thickness is reached, then cooled and removed. At this time, the second optical element 400 is formed.

During the heating process, the first bonding surface 306 of the first sheet 300 is adjacent to the second bonding surface 401 of the second optical element 400 made of the second glass material, and the interface between the two reacts or fuses, So that the two can be closely combined without the aid of any bonding substance. The shape of the core forming surface 106 on the upper mold set 100 will be transferred to the second optical element 400 of the second glass material, and the second optical element 400 of the second glass material will be attached to the first sheet 300 On the first optical element 301, a monolithic glass molded composite lens array substrate 600 having alignment marks 302, 303 is formed (see FIG. 7). Wherein the first joint surface 306 and the second joint surface 401 may both be spherical, or both may be aspherical.

In the first embodiment of the present invention, the first glass material is No. L-LAL13 glass of Japan OHARA Company, its Tg=534 ℃, SP=618 ℃, in the forming of the first stage, it is formed at 605 ℃; The second glass material is No. L-PHL2 glass from Japan OHARA Company, its Tg=381°C, SP=440°C, in the second stage of forming, it is formed at 435°C.

In the second embodiment of the present invention, the first glass material is No. M-BACD5N glass of Japan HOYA Company, its Tg=480 ℃, SP=625 ℃, in the forming of the first stage, it is formed at 610 ℃; The second glass material is No. L-PHL1 glass from Japan OHARA Company, its Tg=347°C, SP=408°C, in the second stage of forming, it is formed at 400°C.

In the third embodiment of the present invention, the first glass material is No. BK7 glass of German Schott Company, its Tg=557 ℃, SP=719 ℃, in the forming of the first stage, it is formed at 700 ℃; the second glass The material is No. K-PG395 glass of Japan Sumita Company, its Tg=381°C, SP=420°C, in the second stage of forming, it is formed at 398°C.

Since the two glass materials that form the monolithic glass molded composite lens array substrate 600 have large differences in Tg points, and are made in the same mold cavity with different stages of pressure forming processes, due to the reaction or fusion phenomenon at the interface And closely combined, and the two optical elements have a curved surface of the same shape at the interface, without heterogeneous interface, which can fully improve the chromatic aberration effect of the composite lens. In addition, the two optical components are directly molded and joined in the same cavity to ensure concentricity without any subsequent alignment work. Moreover, the bonding strength of molded bonding is high, there is no bonding substance at the interface, no interface deterioration occurs, and the effect of thermal expansion is small; after bonding and forming, annealing, core fixing, ink coating and other processes can be directly performed without interface peeling.

As shown in Figures 7 and 8, the integral glass molded composite lens array substrate 600 contains an upper alignment mark 302 and a lower alignment mark 303, and the integral glass molded composite lens thereon is a regular array with a first The surface shape 601, the second surface shape 602, and the third surface shape 603 (refer to FIG. 8 ) are composed of the first optical element 301 made of the first glass material and the second optical element 400 made of the second glass material. Wherein, the second surface shape 602 is formed by fusing the second joint surface 401 of the second optical element 400 to the first joint surface 306 of the first sheet 300 . Then, using the alignment marks 302, 303 and the characteristics of the regular array, the single monolithic glass molded composite lens is separated from the monolithic glass molded composite lens array substrate 600 along the cutting direction to obtain the desired monolithic glass molded lens. Composite lens 700 (shown in FIG. 8 ). The process of separating the optical elements will be described below with reference to FIGS. 9 and 10 .

Referring to FIG. 9 and FIG. 10 , the monolithic glass molded composite lens array substrate 600 is cut along the cutting lines 605 in the X direction and cutting lines 606 in the Y direction between the optical elements. The spacing between the cutting lines 605 in the X direction must be equal, and the spacing between the cutting lines 606 in the Y direction must be equal. Depending on the appearance of the final optical element, the spacing between the cutting lines 605 in the X direction and the spacing between the cutting lines 606 in the Y direction may be equal or different. They are not equal when the final optic is rectangular; they are equal when the final optic is square.

To cut and separate the monolithic glass molded composite lens 700 from the monolithic glass molded composite lens array substrate 600, the relative positions of the multiple alignment marks 302, 303 need to be calibrated with a microscope or CCD first, so as to be used for subsequent diamond whetstone cutting. benchmark. According to this benchmark, the relative position of the numerical control platform and the substrate to be cut is adjusted, so that the cutting process is carried out along the cutting lines 605 and 606 , and finally a monolithic glass molded composite lens 700 is obtained.

In the embodiment shown in FIG. 9 , the monolithic glass molded composite lens array substrate 600 is circular, and the monolithic glass molded composite lens 700 obtained by cutting is square and has convex and concave surfaces.

Referring to FIG. 10 , when cutting and separating, the monolithic glass molded composite lens array substrate 600 is evenly pasted on the UV tape 903 and fixed on the digital control platform 905 of the cutting machine. Subsequently, the relative positions of the multiple alignment marks 302 are calibrated by using the CCD microscope lens 902 . During calibration, align and overlap the magnified alignment marks 302 and the CCD calibration marks 901 on the screen 906 until the relative positions of multiple alignment marks 302 and the CCD calibration marks 901 coincide completely. The shape of the calibration mark is, for example, a square, a diamond, a star, a crosshair, or the like.

Based on the relative reference line obtained by the calibration of multiple alignment marks 302, 303, computer calculations are used to control the positions of multiple cutting lines 605, 606, and the cutting operation is performed with a high-speed rotating diamond whetstone tool 904. When cutting, the cutting edge must cut through the entire glass molded composite lens array substrate 600 , but not through the UV tape 903 . After the cutting is completed, it is irradiated with UV light to separate and obtain a plurality of independent monolithic glass molded composite lenses 700 .

In the two-stage forming process, the present invention utilizes glass materials with large differences in Tg points to form a monolithic glass molded composite lens, and solves the forming interference problem of flat glass forming convex surface rows. In the same mold cavity, the glass lenses formed under pressure at different stages will be closely bonded together without the aid of any adhesive material due to the surface reaction or fusion phenomenon, and the two lenses have a common feature at the interface. The curved surface of the shape can achieve the effect of collecting color difference. In addition, on a substrate containing a plurality of optical elements, a precision alignment and cutting process is performed by aligning marks, which improves yield and manufacturing accuracy.

Claims (8)

1. a composite lens manufactured by integrally molding glass is characterized in that, comprises:

First lamellar body; Be to process by first glass material; This first glass material has glass transition temp; This first lamellar body has end face, bottom surface, a plurality ofly is formed between this top, the bottom surface and is first optical element that multi-part type is arranged along the number cut direction, this first optical element have respectively first engage facial;

A plurality of second optical elements; Be to process respectively by a plurality of second glass materials; Each second glass material has the forming temperature of the glass transition temp that is less than or equal to this first glass material, and it is facial that this second optical element has second joint that is melting on this first joint face respectively; And

Alignment marker is positioned at this first lamellar body and is arranged on one of them person of this top, bottom surface along arbitrary cut direction wherein.

2. composite lens manufactured by integrally molding glass according to claim 1 is characterized in that, the second joint face that first of this first optical module engages facial and second optical module all is dome shape, perhaps all is the aspheric surface shape.

3. composite lens manufactured by integrally molding glass according to claim 1 is characterized in that, this first optical element is to be formed between this top, the bottom surface and to be multi-part type and to arrange along two mutually perpendicular cut direction.

4. composite lens manufactured by integrally molding glass according to claim 1 is characterized in that the xsect of this first lamellar body is rounded, and this alignment marker is that to be positioned at the center of this first lamellar body online and be symmetrical in the center of this first lamellar body.

5. the method for manufacture of a composite lens manufactured by integrally molding glass is characterized in that, comprises:

(A) first glass material is configured as first lamellar body; This first glass material has glass transition temp; This first lamellar body has end face, bottom surface, a plurality ofly is formed between this top, the bottom surface and is first optical element that multi-part type is arranged along the number cut direction; This first optical element has first respectively and engages facially, and at least one mark that aligns is arranged at wherein on of this top, bottom surface along a cutting direction wherein; And

(B) a plurality of second glass materials are engaged at first of this first optical element respectively synchronous forming is a plurality of second optical elements on the face; Each second glass material has the forming temperature that is less than or equal to this glass transition temp, and it is facial that this second optical element has second joint that is melting on this first joint face respectively.

6. the method for manufacture of composite lens manufactured by integrally molding glass according to claim 5 is characterized in that, more is included in this step (B) step (C) afterwards, in this step (C), along this cut direction with this first optical element cutting and separating.

7. the method for manufacture of composite lens manufactured by integrally molding glass according to claim 5 is characterized in that, first of this first optical module engages the facial second joint face with this second optical module and all is dome shape, perhaps all is the aspheric surface shape.

8. the method for manufacture of composite lens manufactured by integrally molding glass according to claim 5; It is characterized in that; In this step (A), the xsect of this first lamellar body is rounded, and this alignment marker is the center that is positioned at the medullary ray of this first lamellar body and is symmetrical in this first lamellar body.

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