CN201165486Y - square optical glass lens - Google Patents

Abstract

The utility model relates to a square optical glass lens, it utilizes a square glass log to put into the upper and lower mould benevolence of the forming die of a multi-cavity, and heats the pressurization mould and make a lens blank that arranges and have a plurality of lenses, again by the lens blank cut out square optical glass lens, it contains: a first optical surface is arranged on one surface of the lens; the second optical surface is arranged on the opposite surface of the first optical surface of the lens and has the same optical axis with the first optical surface; and a right-angle square shoulder part is arranged at the periphery of the first optical surface and the second optical surface; wherein: the optical action surfaces of the square optical glass lenses of the first and second optical surfaces; the right-angle square shoulder part is a non-optical action surface of the square optical glass lens and forms a square with four corners being right angles, wherein the square and the right angles of the shoulder part are formed when the lens blank is cut; so that the lens has a precise optical surface and the manufacturing process of the existing square optical glass lens can be greatly simplified, thereby reducing the manufacturing cost.

Description

square optical glass lens

technical field

The utility model relates to a square optical glass lens, especially a low-cost square optical glass lens with a precise optical surface and a right-angled square shoulder, which is used in mobile phone cameras and CCD (charge coupled device, Charge-coupled device) or CMOS (complementary metal-oxide-semiconductor, complementary metal single metal oxide semiconductor) and other sensing components on the camera.

Background technique

With the advancement of technology, electronic products are constantly developing towards the direction of thin, light, small and multi-functional. In electronic products, such as digital still camera, PC camera, network camera, mobile Devices such as telephones or personal digital assistants (PDAs) all have the demand for imaging devices; and in order to be portable and humanized, the imaging device not only needs to have good imaging quality, but also needs to have a smaller The volume and lower manufacturing cost can effectively improve the applicability of the imaging device.

Glass precision molding technology has been widely used in the manufacture of aspheric molded glass lenses with high resolution, good stability and low cost, such as US2006/0107695, US2007/0043463, Taiwan patents TW095101830, TW095133807, Japanese patent JP63-295448, etc., utilize the characteristics of glass softening at high temperature, heat and soften a glass preform (glass preform) in the upper and lower mold cores of the forming mold, then close the upper and lower mold cores correspondingly and Apply pressure to transfer the optical cavity surfaces of the upper and lower mold cores to the softened glass preform. After cooling, separate the upper and lower mold cores and take them out to form a mold with the shape of the cavity surfaces of the upper and lower mold cores. Glass lenses.

In order to reduce the manufacturing cost, U.S. Patent No. 7,312,933 discloses using the cut square glass raw material to mold a square single lens 1a as shown in Figure 1, so that the square single lens can be easily Assembled in the lens group; Japanese Patent JP63-304201, U.S. Patent US2005/041215 propose glass molded lens array (lens array); for making a single lens, Japanese Patent JP02-044033 discloses the use of moving glass material and multiple A lens blank 2a with a plurality of optical lenses 1b produced by molding is shown in Figure 2, which can be further cut into a single lens 1b; and US2004/165095 discloses multiple mold cavities for an infrared filter (Infrared dray filter) Molding (multi-cavity glass molding), so that the dielectric layer (dielectric layer) can be pressed on a flat and a convex lens, and then cut into a single infrared filter.

Although in the glass molding technology, a forming mold can be used to provide multiple mold cavities, and a plurality of lenses can be made by one molding and then cutting to reduce the manufacturing cost. However, the manufacturing method of multiple mold cavities is still limited to spherical lenses or plano-convex and plano-concave lenses. Since small cameras or mobile phone camera lenses must be designed with aspheric glass lenses, however, if multiple mold cavities are used for molding at one time, it is difficult for air to be discharged smoothly, which reduces the precision of aspheric glass lenses.

In the prior art, there are the following methods to try to solve the problem of residual air, such as Japanese patents JP2002-003225, JP05-286730, JP06-191861, US patent US2005/0172671, European patent EP0648712, etc., using controlled pressure, temperature or surface roughness The method of controlling operating conditions to try to solve the problem of residual air; or as Japanese patents JP61-291424, JP2000-044260, Taiwan patents TWI248919, TW200640807, US patent US2005/0242454, etc., air passages are provided in the molding equipment to Exhaust air; or as Japanese Patent JP61-291424, JP08-337428, U.S. Patent No. 7,159,420 etc., on the mold, especially the lower mold core is provided with grooves or vents etc. to discharge air, but described grooves or vents Air holes may form relative protrusions (such as bumps or ridges) on the formed lens, causing difficulties in secondary processing or subsequent assembly.

For a single mold cavity, the exhaust effect is generally represented by the exhaust efficiency, and the exhaust efficiency δ is equal to the cross-sectional area of the exhaustable channel divided by the cavity volume (δ = cross-sectional area of the exhaustable channel/cavity volume); when The larger the exhaust efficiency δ, it means that the air can escape quickly during the molding process and will not accumulate in the mold cavity. On the contrary, the lower the exhaust efficiency δ, it means that the exhaust is easy to block; in order to be able to exhaust smoothly, the δ value should be higher than More than 0.25 is appropriate. For multiple mold cavities, especially those close to the center of the mold core, it is not easy to vent. After long-term experimental results, for square glass raw materials, the δ value of the mold cavity near the edge of the mold core should be as high as 0.25 The δ value of the mold cavity above and close to the center of the mold core increases proportionally as the distance between the mold cavity and the outer edge of the forming mold (the edge of the mold core) increases. However, in the prior art in which the exhaust passage is provided in the molding equipment, if the cross-sectional area of the passage is large enough, it can approach the preferred δ value, but at this time, a large amount of molten glass will infiltrate into the passage to form a side skirt, resulting in a Afterwards, secondary processing is required to cut off the side skirt; and in the prior art in which several grooves are preset in the lower mold core to form air passages, although it can prevent the glass material from pressing the air passages and hindering the exhaust, but in the forming Several convex bodies will be formed on the lens, which will cause difficulty in lens assembly, and if the cross-section of the groove of the lower mold core is shallow and small, the δ value is too low and the exhaust effect will be lacking; the method of having grooves on the lower mold core is applied in For multi-cavity molding, because the air channel in the center of the multi-cavity is too long, the exhaust effect is not good. Therefore, when using the precision molding glass forming technology to make multi-cavity optical glass lenses, the forming mold should be designed so that the exhaust efficiency δ tends to a larger value, and no protrusions will be formed on the lens to avoid Secondary processing is required to smooth or affect the assembly of the lens in order to meet the requirements of mass production yield and output.

Contents of the invention

The main purpose of the utility model is to provide a square optical glass lens to overcome the above defects.

In order to achieve the above object, the technical solution adopted by the utility model is that a square glass raw material is inserted into the upper and lower mold cores of a multi-cavity forming mold, and the heating and pressurizing mold forms a plurality of lens arrays. The lens blank, and then cut out the square optical glass lens from the lens blank, wherein, it comprises:

A first optical surface is arranged on one side of the lens;

A second optical surface is arranged on the opposite surface of the first optical surface of the lens, and is on the same optical axis as the first optical surface; and

The right-angled square shoulders are arranged on the periphery of the first and second optical surfaces;

in:

The optical effect surface of the square optical glass lens of the first and second optical surfaces;

The right-angled square shoulder is the non-optical surface of the square optical glass lens, and forms a square with four corners at right angles, wherein the square and right angles of the shoulder are formed when the lens blank is cut.

Compared with the prior art, the utility model has the beneficial effects that, firstly, it simplifies the manufacturing process of the square optical glass lens, and enables the square lens to be conveniently assembled on the lens group.

Secondly, the square shoulders with four corners all at right angles can be further formed with relatively formed grooves due to the exhaust channels set on the mold, and the grooves are formed by a plurality of convex bodies set on the forming mold. As a result, during the molding process, the gap formed by the height difference between the convex body and the square glass raw material can be used as an exhaust channel, so that the exhaust efficiency of the mold cavity on the upper edge of the forming mold δ ≥ 0.25, the center The exhaust efficiency of the mold cavity is δ≥0.5, so that the air in the mold cavity can be effectively discharged during the molding process, so as to avoid air remaining in the mold cavity and reduce the precision of the square glass lens.

Description of drawings

Fig. 1 is the schematic diagram of existing square optical glass lens;

Fig. 2 is a schematic diagram of an existing lens blank;

Fig. 3 is the front schematic view of the first embodiment of the square optical glass lens of the present invention;

Fig. 4 is a side schematic view of the square optical glass lens of Fig. 3;

Fig. 5 is a schematic side view of the application of the first embodiment of the square optical glass lens of the present invention to the lens group;

Fig. 6 is a schematic front view of Fig. 5;

Fig. 7 is a schematic side view of the first embodiment of the square optical glass lens of the present invention applied to the lens group;

Fig. 8 is a schematic front view of Fig. 7;

Fig. 9 is a schematic flow chart of the manufacturing method of the utility model square optical glass lens (first embodiment);

Fig. 10 is a schematic front view of the second embodiment of the square optical glass lens of the present invention;

Fig. 11 is a schematic side view of the square optical glass lens in Fig. 10;

Fig. 12 is a schematic side view of the second embodiment of the square optical glass lens of the present invention applied to the lens group;

Figure 13 is a schematic front view of Figure 12;

Fig. 14 is a schematic diagram of the lower die core of the forming die provided with a plurality of convex bodies used in the third embodiment of the present invention;

Fig. 15 is a schematic diagram of the upper die core of the forming die provided with a plurality of convex bodies used in the third embodiment of the present invention;

Fig. 16 is a schematic diagram of the lens blank of the third embodiment of the present invention;

Fig. 17 is a schematic diagram of the third embodiment of the square optical glass lens of the present invention;

Fig. 18 is a schematic diagram of the lower die core of the forming die provided with elongated convex bodies used in the fourth embodiment of the present invention;

Fig. 19 is a schematic diagram of a lens blank of the fourth embodiment of the present invention;

Fig. 20 is a schematic diagram of the fourth embodiment of the square optical glass lens of the present invention;

Fig. 21 is a schematic diagram of the lower die core of the forming die provided with a plurality of inverted V-shaped elongated convex bodies used in the fifth embodiment of the present invention;

Fig. 22 is a schematic diagram of a lens blank molded by the forming mold in Fig. 21;

Fig. 23 is a schematic diagram of the lower die core of the forming die provided with multi-stage inverted V-shaped elongated convex bodies used in the fifth embodiment of the present invention;

Fig. 24 is a schematic diagram of a lens blank molded by the molding die in Fig. 23 .

Explanation of reference signs: 1-(square optical glass) lens (rectangular optical glass lens) 2-lens blank (lens sheet); 11-shoulder (outer); 12-first optical surface (first optical surface); 13 -second doptical surface; 14-strip groove; 15-groove; 16-V-type cutting groove; 17-V V-typecutting groove; 3-lens set; 31-lens holder; 32-diaphragm; 33-cavity; 34-protruding block (bump); 4-rectangular glass blank; 5-forming mold; 50-cavity surface; 51-upper mold; 52-lower mold; 53-heater; 54-protrudent part; 55-strip-shaped convex body; 56-edge; 57-outer edge; 58-upside-down V-typestrip protruding body (upside-down V-typestrip protrusion); 59-gap.

Detailed ways

Below in conjunction with accompanying drawing, above-mentioned and other technical characteristics and advantages of the utility model are described in detail:

<First embodiment>

This embodiment is a concave-convex aspherical square optical glass lens 1 as shown in Figure 3 and Figure 4, which is composed of a first optical surface 12, a second optical surface 13 and a shoulder 11, wherein , the first optical surface 12 is a convex and aspheric surface, the second optical surface 13 is a concave and aspherical surface, the shoulder 11 is square and the four corners are right angles, that is, the aforementioned right angle square shoulder 11.

In the square optical glass lens 1 of the present embodiment, its focal length is 1.87 mm, when assembled in the lens group 3 as shown in Figure 5, 6, can be applied to the diagonal size is 1/7 " (inch) below CMOS sensing assembly. The aspheric surface parameters of the convex aspheric surface of the first optical surface 12 of the present embodiment and the concave aspheric surface of the second optical surface 13 are as Table 1, and the aspheric surface formula used is as formula (1):

Aspherical formula (1)

$\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="Cy"\; filenames="Y20082000452700221.png,Y20082000452700252.png"\; state="\{\{state\}\}">Cy</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\sqrt{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; K</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; C</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="Y"\; filenames="Y20082000452700221.png,Y20082000452700252.png"\; state="\{\{state\}\}">Y</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="Y"\; filenames="Y20082000452700221.png,Y20082000452700252.png"\; state="\{\{state\}\}">Y</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 6</span>}}{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 8</span>}}{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 8</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 10</span>}}{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="12"\; label="Y"\; filenames="Y20082000452700163.png,Y20082000452700164.png"\; state="\{\{state\}\}">Y</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; 14</span>}}{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 14</span>}}$

Wherein, C=1/R; and each parameter is defined as follows:

X: sinking depth value (Sag);

Y: is the value in the Y direction (the distance from the zero point of the surface center);

C: is the curvature in the X direction, that is, the reciprocal of the curvature radius R;

K: Conic constant;

A2-An: are the aspheric coefficients of Y's power of 2, 4, 6, 8, 10, 12, ...n.

Table 1: Aspherical parameters of the first embodiment

As shown in Fig. 5 and Fig. 6, they are the schematic diagrams that the square optical glass lens 1 of the present embodiment is assembled in a lens group 3 respectively, and the described lens group 3 comprises a square optical glass lens 1, a lens seat 31 and A diaphragm 32, wherein, the right-angled square shoulder 11 of the square optical glass lens 1 is fixed with the lens seat 31, and the first optical surface 12 and the second optical surface 13 are used as the optical active area, and the light entering the diaphragm 32 can be The light is focused on a CMOS sensing element (not shown).

Please refer to Fig. 9, the manufacturing method of the square optical glass lens 1 of the present invention is mainly based on a square glass raw material 4, and utilizes a multi-cavity forming mold (multi-cavity forming mold) 5 to mold the glass with multi-cavity molding ( multi-cavity glass molding) into a lens blank 2 with multiple lenses, and then separated into individual (individual) square optical glass lenses 1; in this embodiment, a forming mold 5 with 20 mold cavities 50 is used for one-shot molding It is a lens blank 2 with 20 first optical surfaces 12 and second optical surfaces 13 (i.e. 20 lenses), and then cut and separated into 20 square optical glass lenses 1; as shown in Figure 9, the present embodiment The manufacture method of square optical glass lens 1 comprises the following steps:

Provide a square glass raw material 4, the square glass raw material 4 is made of H-BAL42 glass material, and the square glass raw material 4 is preferably uniform in thickness, so as to save molding heating and pressing time ;

A lens forming mold 5 is provided, the forming mold 5 at least includes an upper mold core 51 and a lower mold core 52, the upper mold core 51 is respectively provided with 20 convex aspherical cavity surfaces 50, and the lower mold core 52 corresponds to The convex aspheric mold surface of upper mold kernel 51 is provided with 20 concave aspheric mold cavity surfaces 50 (for the convenience of the utility model, no matter whether the aspheric mold cavity surfaces set by upper mold kernel 51 and lower mold kernel 52 are convex Aspherical surface or concave aspheric surface, generally referred to as mold cavity surface in the utility model);

Place the above-mentioned square glass raw material 4 in the space formed by the upper mold core 51 and the lower mold core 52 of the above-mentioned forming mold 5, use a heating device 53 such as a heating tube to heat to the softening point temperature of the glass, and then heat the upper mold core 51 and the lower mold core 52. The lower mold core 52 exerts reverse (relative) pressure to carry out the molding operation of heating and pressing, so that the square glass raw material 4 passes through a plurality of corresponding convex and concave irregularities between the upper mold core 51 and the lower mold core 52. The spherical mold cavity surface 50 is molded into a lens blank 2, and the lens blank 2 has 20 corresponding convex aspheric surfaces (12) and concave aspheric surfaces (13);

The lens blank 2 is cut according to a predetermined size to separate it into a single finished product of a square optical glass lens 1, and the square optical glass lens 1 has a convex aspherical first optical surface 12, a A concave aspheric second optical surface 13 and a square shoulder 11 .

Wherein in the step of cutting, the square optical glass lens 1 is cut into a single lens by the lens blank 2 in the longitudinal direction and the transverse direction, although the right-angled ends of its right-angled square shoulder 11 may produce irregularities during the cutting operation. The pointed end is smoothed without affecting the optically active surfaces of the first optical surface 12 and the second optical surface 13 .

In addition, the right-angled square shoulder 11 of the square optical glass lens 1 of the utility model does not need to be ground to remove the uneven sharp corners that may occur at each right-angled end, so as to effectively reduce the production cost; when assembling, as shown in the figure 5. As shown in FIG. 6, a cavity 33 can be respectively provided at the four corners of contact between the lens seat 31 of the lens group 3 and the right-angled square shoulder 11 of the square optical glass lens 1 to correspond to the right-angled end of the right-angled square shoulder 11 to facilitate Assemble; or as shown in Figure 7 and Figure 8, symmetrical protruding blocks 34 can be respectively set at the four-side contact places of the right-angled square shoulder 11 of the lens seat 31 and the square optical glass lens 1, so that two adjacent protruding blocks 34 The corners between them form a cavity 33 relatively, which can also be beneficial to assembly; therefore, the non-grinding and uneven sharp corners of the square optical glass lens 1 of the utility model can be accommodated in the corresponding cavity 33 in the lens group 3 , without affecting the assembly accuracy, thereby eliminating the grinding process and further reducing the manufacturing cost.

<Second Embodiment>

The present embodiment is a biconvex aspherical square optical glass lens 1 as shown in Figure 10 and Figure 11, which is composed of a first optical surface 12, a second optical surface 13 and a rectangular square shoulder 11, Wherein, the first optical surface 12 is a convex aspheric surface, the second optical surface 13 is a convex aspheric surface, the right-angled square shoulder 11 is square and the four corners are all right angles.

In the square optical glass lens 1 of the present embodiment, its focal length is 1.796 mm. When assembled in the lens group 3 as shown in Figures 12 and 13, it can be applied to CMOS sensors with a diagonal size below 1/10 "(inch). Measuring assembly. The first optical surface 12 and the second optical surface of the present embodiment are both convex aspheric surfaces, and the aspheric surface parameters of the convex aspheric surface are as shown in Table 2, and the aspheric surface formula used is the aspheric surface described in the first embodiment Formula 1).

Table 2: Aspherical parameters of the second embodiment

As shown in FIGS. 12 and 13 , they are respectively schematic diagrams of assembling the square optical glass lens 1 of this embodiment into a lens group 3 . The lens group 3 includes a square optical glass lens 1, a lens seat 31 and a diaphragm 32, wherein the right-angled square shoulder 11 of the square optical glass lens 1 is fixed with the lens seat 31, and the first optical surface 12 and the second optical surface 13 are the optical active area, which can focus the light entering the diaphragm 32 on the CMOS sensing component (not shown in the figure).

The manufacturing method of the square optical glass lens 1 of the utility model is mainly based on a square glass raw material 4, and utilizes a multi-cavity forming mold (multi-cavity forming mold) 5 to mold the glass with multi-cavity molding (multi-cavity glass molding) ) into a lens blank 2 with multiple lenses, and then separated into individual (individual) square optical glass lenses 1; therefore, the manufacturing method and steps of the square optical glass lens 1 of this embodiment are the same as those of the first embodiment (as shown in Figure 9 shown) is similar, so it will not be further described here, but the mold cavity surface 50 of the forming die 5 used in this embodiment is a double concave type, that is, the mold cavity surfaces 50 of the upper mold core 51 and the lower mold core 52 are concave. The aspheric mold cavity surface 50 makes the pressed square optical glass lens 1 a biconvex aspheric lens.

In addition, when the square optical glass lens 1 of the present embodiment is cutting, the square optical glass lens 1 is cut into a single lens by the lens blank 2 in the vertical and horizontal directions, although the right-angled ends of the right-angled square shoulders 11 may Uneven sharp corners are produced during the cutting operation, but the optical effect surfaces of the first optical surface 12 and the second optical surface 13 are not affected. In addition, the right-angled square shoulder 11 of the square optical glass lens 1 of the present invention does not need to be ground to remove the uneven sharp corners that may occur at each right-angled end, so as to effectively reduce the production cost; and when assembling, such as As shown in Fig. 12 and Fig. 13, symmetrical protruding blocks 34 can be arranged respectively at the contact positions of the four sides of the lens seat 31 and the right-angled square shoulder 11 of the square optical glass lens 1, so that the intersection between two adjacent protruding blocks 34 A cavity 33 is relatively formed to facilitate assembling; or a cavity 33 is respectively set at the four-corner contacts of the lens seat 31 of the lens group 3 and the right-angled square shoulder 11 of the square optical glass lens 1 (with reference to Fig. 5 of the first embodiment , shown in Fig. 6), to correspond to the right-angled end of the right-angled square shoulder 11 and facilitate assembly; therefore, the uneven sharp-edged end of the square optical glass lens 1 of the utility model without grinding can be accommodated in the lens group 3 The corresponding cavity 33 does not affect the assembly accuracy, thereby eliminating the grinding process and further reducing the manufacturing cost.

<Third Embodiment>

This embodiment is a square optical glass lens 1 made by utilizing a forming mold provided with a convex body, as shown in FIG. 17 . In the existing glass lens molding process, when the glass preform (glass preform) is placed in the cavity of the forming mold, there is generally a vacuuming process, the purpose of which is to discharge excess air in the cavity and avoid air residue Bubbles are caused in the mold cavity and affect the accuracy. Because the glass material will press the lower mold core and cause the air in the mold cavity of the lower mold core to be difficult to get rid of, there are many technologies to overcome this problem in the molding process of a single mold cavity; During the process, that is, multi-cavity glass molding (multi-cavity glass molding), it is not easy to remove the gas. Referring to Fig. 14 and Fig. 9, the lower mold core 52 of the forming die 5 used in this embodiment can be provided with a plurality of convex bodies 54 (15 as shown in Fig. 14 ), and the number of the convex bodies 54 can be determined according to Depending on the number of mold cavity surfaces 50 (i.e. mold cavities), it is arranged at an appropriate position on the outside of the mold cavity surface 50 of the lower mold core 52 and has a consistent height; Body 54 (15 as shown in Figure 15) (can be determined according to the number of mold cavities) convex body 54, the number of said convex body 54 can be further matched with the number of mold cavity surface 50 (i.e. mold cavity) or the lower mold It is determined by the arrangement of a plurality of convex bodies 54 on the core 52, which is arranged at an appropriate position outside the mold cavity surface 50 of the upper mold core 51 and has a consistent height; wherein, the upper mold core 51 may not be provided with convex bodies 54, but After setting, the exhaust efficiency δ can be increased, and the upper and lower die cores 51, 52 of the forming die 5 used in this embodiment are all provided with convex bodies 54 .

Since a gap is formed between the convex body 54 of the lower mold core 52 and the upper mold core 51 and the surface of the square glass raw material 4, when vacuuming during the molding process, the air in the cavity can be evacuated by the molding equipment after being vacuumed. The gap formed by the height difference around the convex body 54 is discharged to the outside to achieve a high-efficiency exhaust effect, that is, to increase the exhaust efficiency δ value. And described convex body 54 can form opposite groove (or concave hole) 15 on the molded lens blank 2 as shown in Figure 16, and described groove (or concave hole) 15 also may be in lens The rough blank 2 remains on the shoulder 11 of the square optical glass lens 1 after cutting as shown in Figure 17 (depending on the position of the protruding body 54 or the position of the cutting separation line), the groove ( or concave hole) 15 will not affect the size and precision of the right-angled square shoulder 11 of the lens 1 of the present embodiment, and can avoid that the exhaust grooves provided in the existing forming molds often form a relative cavity on the shoulder of the lens. Protrusions affect the size and precision of the shoulder of the forming lens; using the forming mold 5 provided with the convex body 54 of this embodiment can improve the forming yield of the molded glass lens 1 without affecting the lens 1 subsequent assembly work.

This embodiment utilizes a forming mold 5 with a convex body 54 to manufacture, and the square optical glass lens 1 of this embodiment can be the convex-concave aspheric lens of the first embodiment or the biconvex aspheric lens of the second embodiment or For other types of aspheric lenses, the manufacturing method of this embodiment is illustrated by taking the convex-concave aspheric lens of the first embodiment as an example (but not limited to convex-concave aspheric lenses), which includes the following steps (refer to FIG. 9 and FIG. 14, as shown in Figure 15):

Provide a square glass raw material 4, the square glass raw material 4 is made of H-BAL42 glass, in order to save molding heating and pressing time, uniform thickness is the best;

A lens forming mold 5 is provided, the forming mold 5 at least includes an upper mold core 51 and a lower mold core 52, and the upper mold core 51 is respectively provided with a plurality of (20 as shown in Figure 14 ) convex aspheric mold cavities surface 50, and the lower mold core 52 corresponds to the convex aspheric mold cavity surface of the upper mold core 51 and several (20 as shown in Figure 15) concave aspheric mold cavity surfaces 50; A plurality of (15 as shown in Figure 14 and Figure 15) protrusions 54 are respectively provided on the outer ring portion of the aspheric mold cavity surface 50 of the lower mold core 52, and the height of each protrusion 54 is uniform (but the above mentioned No convex body 54 may be provided on the outer ring portion of the aspheric mold cavity surface of the upper mold core 51);

Place the above-mentioned square glass raw material 4 in the space formed by the upper mold core 51 and the lower mold core 52 of the forming mold 5, use a heating device 53 such as a heating tube to the softening point temperature of the glass, and then heat the upper mold core 51 and the lower mold core. The core 52 applies reverse (relative) pressure to carry out the molding operation of heating and pressing, so that the square glass raw material 4 is pressed out by the convex-concave aspherical mold cavity surface 50 of the upper mold core 51 and the lower mold core 52. A lens blank 2 is shown in Figure 16. The lens blank 2 has 20 convex aspheric surfaces (12) and 20 corresponding concave aspherical surfaces (13), and the single lens blank 2 15 grooves 15 are respectively formed on the surface due to the convex body 54 as shown in Figure 16 (the lens blank 2 shown in Figure 16 shows 30 grooves 15 due to the transparency relationship);

The lens blank 2 is cut according to a predetermined size, separated into a single finished product of a square optical glass lens 1, and the square optical glass lens 1 has a convex aspheric first optical surface 12, a concave aspherical The second optical surface 13 of the spherical surface and the outer right-angled square shoulder 11 of the optical surfaces 12, 13, and if there is a groove 15 left on the shoulder 11, as shown in Figure 17, the groove 15 and Subsequent assembly operations of the square optical glass lens 1 are not affected.

<Fourth Embodiment>

The present embodiment is a square optical glass lens 1 manufactured by a forming die provided with a strip-shaped convex body, as shown in Figure 20, and the forming die is especially suitable for larger and deeper die cavity surfaces The molding die 5 is not easy because of its exhaust. In order to increase the exhaust efficiency δ, the convex body 54 provided on the molding die of the third embodiment can be further changed into a strip-shaped convex body 55, and properly arranged on the On the outer ring portion of the aspheric mold cavity surface 50 of the lower mold core 52 and/or upper mold core 51 of the forming die 5, and the elongated convex body 55 can be extended from the edge 56 of the mold cavity surface 50 to The outer edge 57 of the forming die 5 is shown in FIG. 18 . The manufacturing method of this embodiment is the same as that of the third embodiment, and the lens blank 2 molded by it is shown in FIG. 14; and cut the lens blank 2 to separate into a single square optical glass lens 1. The finished product is shown in Figure 20, which has a convex aspheric first optical surface 12 and a concave aspheric second optical surface. The optical surface 13 and the right-angled square shoulder 11, wherein, if the rectangular groove 14 remains on the right-angled square shoulder 11 as shown in FIG. The position of the separation line depends), and the elongated groove 14 will not affect the size and precision of the right-angled square shoulder 11 of the square optical glass lens 1; The mold 5 can improve the forming yield of the square optical glass lens 1 of this embodiment without affecting the subsequent assembly operation of the lens 1 .

<Fifth Embodiment>

This embodiment is a square optical glass imaging lens 1 with pre-grooved grooves manufactured by a forming mold with an inverted V-shaped elongated body, as shown in FIG. 22 . For the convenience of cutting a lens blank 2 into several square optical glass lenses 1 of the same size, multiple lenses can be arranged on the outer ring portion of the aspheric mold cavity surface 50 of the upper mold core 51 or the lower mold core 52 of the forming mold 5 . The inverted V-shaped strips 58 are shown in Figure 21. The inverted V-shaped strips 58 are arranged at equal intervals longitudinally and/or horizontally, and have a uniform height, so that the air in the mold cavity can be formed by The square glass raw material 4 and the inverted V-shaped strip convex body 58 are discharged outwards in the gap formed by the height difference, and the exhaust efficiency is improved; and the inverted V-shaped strip convex body 58 can be V-shaped pre-grooves 16 are correspondingly formed on the molded lens blank 2 as shown in FIG. 22 . The manufacturing method of this embodiment is the same as that of the third embodiment, and the lens blank 2 produced by it has a formed V-shaped pre-grooved groove 16 as shown in Figure 22, so that the lens blank 2 can utilize the V-shaped pre-groove The grooves 16 are separated into a single square optical glass lens 1 finished product.

Also, the above-mentioned inverted V-shaped strip convex bodies 57 arranged at equal intervals longitudinally and/or horizontally on the lower mold core 52 and/or upper mold core 51 can be further changed into inverted V-shaped strip convex bodies 58 arranged intermittently, such as Shown in Figure 23, namely a longer inverted V-shaped strip convex body 58 is changed into shorter and multi-stage or intermittently arranged inverted V-shaped strip convex body 58, so that each section inverted V-shaped strip convex body There are gaps 59 between the bodies 58 without forming a closed state, so as to improve the exhaust efficiency of the forming mold; and the molded lens blank 2 also has V-shaped pre-grooves 17 arranged in multiple sections or discontinuously, as shown in the figure As shown in 24, it can be beneficial to cut into multiple (20 as shown) single square optical glass imaging lenses 1; and the above-mentioned V-shaped pre-grooves 16, 17 will not affect this embodiment The size and precision of the right-angled square shoulder 11 of the square optical glass lens 1; the use of the forming mold 5 provided with the inverted V-shaped elongated convex body 58 can improve the forming yield of the square optical glass lens 1 of this embodiment without affecting Subsequent assembly of the lens 1 described above.

What is shown above is only a preferred embodiment of the present invention, and is only illustrative, not restrictive, of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalent changes can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims (7)

1. square optical glass lens, it is to utilize the former material of a square glass to insert in the upper and lower die of shaping dies in a multimode cave, and the pressurization of heating is molded as an Optical blanks that is arranged with plurality of lens, cut out square optical glass lens by described Optical blanks again, it is characterized in that: it comprises:

One first optical surface is located at the one side of eyeglass;

One second optical surface is located on the opposite face of first optical surface of eyeglass, and with the same optical axis of first optical surface; And

One right angle square shoulder portion is located at the periphery of first and second optical surface;

Wherein:

The optical effect face of the square optical glass lens of described first and second optical surface;

The square shoulder in described right angle is the non-optical plane of action of square optical glass lens, and form one square and four jiaos be the right angle, the square of wherein said shoulder and right angle are to form when cutting Optical blanks.

2. square optical glass lens according to claim 1 is characterized in that: first and second optical surface of described eyeglass comprises a convex aspheric surface and a recessed aspheric surface and forms a convex-concave aspherical lens.

3. square optical glass lens according to claim 1 is characterized in that: first and second optical surface of described eyeglass comprises two convex aspheric surfaces and forms a pair of convex aspheric surface eyeglass.

4. square optical glass lens according to claim 1, it is characterized in that: also form at least one groove on the one or both sides of the square shoulder in right angle of described eyeglass, and described groove is by the convex body of set exhaust on the die cavity outside of the upper and lower die of shaping dies, and when model with respect to Optical blanks on mold forming.

5. square optical glass lens according to claim 1, it is characterized in that: also form at least one long strip shape groove on the one or both sides of the square shoulder in right angle of described eyeglass, and the long strip shape convex body that described long strip shape groove is used by set exhaust on the die cavity outside of the upper and lower die of shaping dies, and when the model with respect to Optical blanks on mold forming.

6. square optical glass lens according to claim 1, it is characterized in that: also form on the one or both sides of the square shoulder in right angle of described eyeglass many vertically with the pre-flutings of laterally equidistantly arranging of V-type, the pre-fluting of described V-type by set exhaust on the die cavity outside of the upper and lower die of shaping dies use vertically with laterally equidistantly arrangement and highly uniform reverse V-shaped rectangular convex body and when the model with respect to Optical blanks on mold forming.

7. according to claim 1 or 6 s' square optical glass lens, it is characterized in that: the square of the square shoulder in right angle of described eyeglass also utilizes the pre-fluting of V-type of institute's mold forming on the Optical blanks and separates formation with the right angle.

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