CN102785146B - Lens blank and producing method thereof, and producing method of lens - Google Patents
Lens blank and producing method thereof, and producing method of lens Download PDFInfo
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- CN102785146B CN102785146B CN201210152460.7A CN201210152460A CN102785146B CN 102785146 B CN102785146 B CN 102785146B CN 201210152460 A CN201210152460 A CN 201210152460A CN 102785146 B CN102785146 B CN 102785146B
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Abstract
The invention provides a glass-made lens blank which can conduct good secondary processing and a producing method of the lens blank, and a producing method of the lens. The lens blank comprises two opposite main surfaces (R1, R2) which are used for being finely processed into optical function faces and side face peripheral parts (4) encircling the two main surfaces. The side face (4) of the glass-made lens blank (1) used for applying secondary processing is provided with a recessed part (6) and/or protruding part (5) whose main surface side directing towards the other main surface side.
Description
Technical field
The present invention relates to be used to lens blank and its manufacture of glass system lens to be made by the secondary operations including polishing
Method and the method that secondary operations are carried out to the lens blank and lens are manufactured.
Background technology
It is known that the products formed for being referred to as lens blank with the shape approximate with lens shape is produced by melten glass,
And the method for being ground, being polished and produced lens, patent documentation 1 describes one of example.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 2008-207973 publications
When lens are made by lens blank, kept with the chuck of the milling drum for being referred to as curve generator first
And the side of fixed lens blank, i.e. lens are processed into circumference（コバ）Face, make workpiece（Lens blank）And emery wheel
Rotated so as to be ground the sphere for the curvature with needed for round about.After being ground to two first type surfaces of lens blank,
Fine ginding, polishing are carried out, and is felt relieved, so as to polish is lens.
However, just having used in the object lens side lens such as front camera lens, refractive astronomical telescope, binocular bodys in telescope
The bigbore glass lens of amplification, but the circumference of these lens is thin.For making the lens of the thin lens of circumference
It is blank, also thin equivalent to the part of circumference, when being ground with curve generator, cause clamping element to skid,
Grinding cannot be smoothed out, or unfavorable condition as glass breakage easily occur.
The content of the invention
Present invention aim to address above-mentioned problem, there is provided the glass system lens blank of good secondary operations can be carried out
And its manufacture method of manufacture method and lens.
As the means for solving above-mentioned problem, the lens blank of the present invention be for implementing to include the secondary operations of polishing and
The glass system lens blank of lens is finish-machined to, wherein, the lens blank possesses：For being finish-machined to optical function face
Two opposed first type surfaces；With the side for surrounding described two first type surfaces, in the side with from a main surface side direction
The recess of another main surface side and/or convex portion.
In addition, in the lens blank of the present invention, the lens blank can be in biconvex shape, plano-convex exterior shape, the male bend moon
Any shape in shape.
In addition, in the lens blank of the present invention, the recess or the convex portion can be formed at the complete cycle of side.
In addition, in the lens blank of the present invention, the convex portion and the recess can be formed as equally spaced throughout whole
Week.
In addition, in the lens blank of the present invention, the recess or the convex portion can be formed at a part for side.
In addition, the present invention lens blank in, be configured to, with the respective center phase of described two first type surfaces
The axis of symmetry of friendship, the convex portion and the recess it is at an angle both relative to the axis of symmetry.
In addition, in the lens blank of the present invention, the convex portion can be 0～60 relative to angle formed by the axis of symmetry
The scope of degree, the axis of symmetry can be in 0～60 degree of scopes with angle formed by the recess.
In addition, in the lens blank of the present invention, the interval of the recess or convex portion can be 0.5mm～1.6mm's
Scope.
In addition, in the lens blank of the present invention, the top of the convex portion can carry fillet.
In addition, in the lens blank of the present invention, external diameter can be in the scope of 30mm～105mm, and center wall thickness can be
The scope of 5mm～30mm.
In addition, in the lens blank of the present invention, being configured to, outer edge is that the wall of wall ratio center wall thickness is thin
Portion, the scope of the thickness of the wall thin section in 1～20mm.
In addition, in the lens blank of the present invention, the ratio of the thickness t2 and center wall thickness t1 of wall thin section（t2/t1）Can be
1/30～1/2 scope.
In addition, in the lens blank of the present invention, the thickness t2 of wall thin section and external diameterRatioCan 1/105～
1/2 scope.
A kind of manufacture method of the lens blank for being finish-machined to lens for enforcement includes the secondary operations for polishing, profit
Punch forming is carried out to melten glass with punch-forming mold, by the punch forming face of a pair of pushing against mold and body die
Side face is copied on glass, wherein, the punch-forming mold possesses：Opposed the pair of pushing against mold；With the main body
Mould, the body die inner peripheral surface with the recess from a pushing against mold side towards another pushing against mold and/or
Convex portion.
In addition, carrying out being ground to lens blank, in the manufacture method of lens that polishes, including following operation：Using upper
The lens blank stated, keeps the side of the lens blank and first type surface is ground.
Carrying out being ground to lens blank, in the manufacture method of lens that polishes, including following operation：Using above-mentioned saturating
The manufacture method of mirror produces lens blank, keeps the side of the lens blank and first type surface is ground.
（Invention effect）
In accordance with the invention it is possible to provide lens blank and its manufacturer of the glass system that can carry out good secondary operations
The manufacture method of method and lens.
Description of the drawings
Fig. 1 is the sectional view including axle C of the lens blank of an embodiment of the invention.
Fig. 2 schematically shows the part that the formation of the lens blank shown in Fig. 1 has the side of recess and convex portion.
Fig. 3 schematically shows the lens blank of an embodiment of the invention different from the lens blank shown in Fig. 1
The formation of part has a part for the side of recess and convex portion.
Fig. 4 is the vertical cross section of of the punch-forming mold used in the manufacture method of the lens blank of the present invention
Figure.
Fig. 5 represents the recess and a part for convex portion of the inner peripheral surface formation in the body die shown in Fig. 4.
Symbol description
1 lens blank
2 wall thickness
3 wall thin section
4 circumferences
C optical axises
The first faces of R1
The second faces of R2
Mould on 10
10a upper die formings face
20 moulds
21 times moulds
Mold forming face under 21a
22 body dies
Specific embodiment
（Lens blank）
The lens blank of the present invention is to be finish-machined to the glass system of lens for enforcement includes the secondary operations for polishing
Lens blank, it is characterised in that the lens blank includes：For being finish-machined to opposed two first type surface in optical function face；
With the side for surrounding described two first type surfaces, in the side with from a main surface side towards the recessed of another main surface side
Portion and/or convex portion.
Lens blank refers to glass forming body as follows：Shape with the lens that will be made is plus by secondary
Shape, the glass forming body of i.e. approximate with the shape of lens shape obtained by the allowance that processing is removed.
In addition, lens blank is different with blank from punch forming, it is not intended to implement to make its plastic deformation to glass heating
Hot worked glass article, but for the article of lens is produced by cold working.
One of said lens blank is illustrated using Fig. 1.Fig. 1 is represented including the lens blank 1 of biconvex lens is processed
Become the section of the axle C of optical axis during into lens.In addition, when lens blank is processed as lens, the shape of lens blank and thoroughly
In the case that the shape of mirror is approximate, processing capacity can be reduced, except process time can be shortened, additionally it is possible to reduce by processing quilt
The glass of removing, therefore, it is possible to reduce processing bits, so being preferred.Due to it is such the reasons why, the lens blank of biconvex lens
Part is preferably biconvex shape, and the lens blank of planoconvex lenss is preferably plano-convex exterior shape, and the lens blank of convex meniscus lens is excellent
Choosing is convex meniscus shape.Axle C is also the axis of symmetry of lens blank.The lens blank of biconvex shape is not limited to, axle C is lens blank
The axis of symmetry of part.The axis of symmetry is intersected with each first type surface in the center of two first type surfaces of lens blank.That is, it is described
The intersection point of axis of symmetry and first type surface becomes the center of first type surface.In FIG, the first face R1, the second face R2 are the masters of lens blank 1
Surface, and the optical function face of lens is processed into by secondary operations.Side of the circumference 4 equivalent to lens blank 1,
In the lens blank 1 of biconvex lens, the part of axle C and close axle C is that central part becomes wall thickness 2, near circumference 4
Part is that the outer edge of lens blank becomes wall thin section 3.
Fig. 2 is the figure for expanding a part for the i.e. side of lens blank 1 of circumference 4, and lower section is the first face R1 in Fig. 1
Side, top are the second face R2 sides.As shown in Fig. 2 in the side of lens blank 1, to be formed with from one throughout complete cycle at equal intervals
Individual main surface side is lateral another main surface side of the first face R1 convex portion 5 that i.e. the second face R2 sides extend and recess 6.5 He of convex portion
Recess 6 is formed as at an angle both relative to axle C (not shown).
By so there is convex portion 5 and recess 6 in the side of lens blank 1, the side of lens blank 1 is kept using chuck
Face, and lens blank 1 is rotated around axle C, when first type surface is ground, the side of lens blank 1 can be made（Circumference 4）And card
Effective friction increase between disk, can be ground first type surface in the case where lens blank 1 and chuck are non-slip.
Convex portion 5 and recess 6 are respectively with angle formed by axle C preferably in 0～60 degree of scope.Angle is difficult to when being more than 60 degree
Make above-mentioned effective friction increase.
Fig. 3 is the figure for expanding a part for the side of another lens blank 1.In this example embodiment, in the side of lens blank 1
Face is formed with：Relative to multiple recess 6a that axle C (not shown) is equally spaced formed at an angle；And with it is the plurality of
Multiple recess 6b that recess 6a intersects at a certain angle.Convex portion 5 is become by the part that recess 6a, 6b are surrounded.In the example shown in Fig. 3
In son, it is also possible to make the effective friction increase between the side of lens blank 1 and chuck.In addition, recess 6a, 6b and axle C institute into
Angle preferably in 0～60 degree of scope.
According to the present invention, as the effective friction increase between the side of lens blank 1 and chuck can be made, so this
It is bright suitable for such as biconvex lens, planoconvex lenss, convex meniscus lens, the thickness of circumference 4 than lens center wall thickness
And easily occur the situation of skidding in grinding between the side of lens blank 1 and chuck.From such a viewpoint, this
Bright lens blank 1 is preferably provided with the arbitrary shape in biconvex shape, plano-convex exterior shape, convex meniscus shape.In addition, with reference to Fig. 1 pins
The item is illustrated by the lens blank of biconvex shape, it is also possible to the lens blank or convex falcate suitable for plano-convex exterior shape
The lens blank of shape.
In addition, the glass for becoming the material of lens blank 1 is not particularly limited, but there is low dispersibility and abnormal local
Dispersibility, is suitable to achromatic, used as the material of the bigbore lens with positive amplification ratio, suitable fluorophosphate optics glass
Glass is particularly preferred material.
In addition, with regard to the external diameter of lens blank 1Center wall thickness t1, equivalent to circumference 4 wall thickness wall thin section thickness
Degree t2 is not particularly limited, if illustrating the size at each position, external diameterIt is 5mm for 30mm～105mm, center wall thickness t1
～30mm, in the lens blank of lens blank, plano-convex exterior shape in biconvex shape, the lens blank of convex meniscus shape, equivalent to
The thickness t2 of the wall thin section 3 of the wall thickness of circumference 4 is 1mm～20mm or so.In addition, the thickness t2 of wall thin section and center wall thickness t1
Ratio（t2/t1）For 1/30～1/2, the thickness t2 of wall thin section 3 and external diameterRatioFor 1/105～1/2 or so.
The interval of recess 6 or convex portion 5 is not particularly limited, for example, can be 0.5mm～1.6mm or so.
Recess 6 or convex portion 5 can also be formed at the complete cycle of the side of lens blank 1, but as long as being prevented from lens blank
Skid between part 1 and chuck, it is also possible to be formed in a part for the side of lens blank 1.
Additionally, it is preferred that the top of the convex portion 5 carries fillet, to avoid damaging when the side of lens blank 1 is clamped
The top of the convex portion 5 that side is formed.
In addition, when lens are installed and fixed, by circumference 4 for positioning reference plane improving fixed precision, so phase
Than by the allowance that is removed of secondary operations such as centering, preferably making the recess 6 formed in the side of lens blank 1 in advance
Depth, the height of convex portion 5 or recess 6 form little with the difference of height of convex portion 5.
The recess 6 of the side of lens blank 1, convex portion 5 are worked as anti-slip part during secondary operations.
（The manufacture method of lens blank）
The manufacture method of the lens blank of the present invention is finish-machined to for enforcement includes the secondary operations for polishing
The manufacture method of the lens blank of mirror, is characterised by, punch-forming mold includes：A pair opposite pushing against mold；With including
Body die of the side face with the recess from pushing against mold side towards another pushing against mold and/or convex portion, using described
Punch-forming mold carries out punch forming to melten glass, and by the punch forming face of the pair of pushing against mold and main body mould
The inner peripheral surface of tool is copied on glass.
Fig. 4 represents the vertical section of an example of the punch-forming mold for using in the above-mentioned methods.Upper mould 10 is with
Mould 21 constitutes a pair of pushing against mold, and lower mould 21 is embedded in body die 22 and mould 20 is constituted.Multiple moulds 20 are configured at and are turned
On platform, the turntable indexing rotatably each mould 20 of circulation transfer, the stream of melten glass effuser (not shown) in Fig. 4 is stayed in are made
On the lower mold forming face 21a of the mould 20 of the underface of outlet, receive from flow export the end of melten glass stream flowed out, with cutting
Breaking piece cuts off melten glass stream, and the melten glass of the amount equivalent to a lens blank 1 is obtained on lower mold forming face 21a
Block.Then, by making the indexing rotation of mould 20 for being mounted with fused glass block up standby to make which stay in upper mould 10
Position, carries out punching press to fused glass block using upper mould 10 and lower mould 21, makes glass in the mould 10 by, lower mould 21, main body mould
The space surrounded by tool 22（Cavity）Intramedullary expansion, copies upper die forming face 10a, lower mold forming face 21a, main body mould on glass
The shape of tool inner peripheral surface, and it is shaped to lens blank 1.
Recess 50 as shown in Figure 5 and convex portion 60 are formed with the inner peripheral surface of body die 22, will be main using punch forming
The shape of mould inner peripheral surface is copied on glass as the side of lens blank 1, so, in the inner peripheral surface of body die 22
The recess 50 for being formed forms convex portion 5 in the side of lens blank 1, and the convex portion 60 formed in the inner peripheral surface of body die 22 exists
The side of lens blank 1 forms recess 6.
As long as in addition, the viscosity of glass during punch forming is with 1dPas～103dPas or so as target.Punching
The pressure time can be with 3～100 seconds as target, and stamping pressure can be with 15KPa～60KPa as target.
Then, after punch forming terminates, mould 10 is kept out of the way upward, make mould 20 and the lens blank 1 one in mould
Rise and transferred to the stop place of back segment successively.During the transfer, lens blank 1 is cooled, solidification, takes out and quilt from mould
Annealing.
Rotated by making turntable, above-mentioned operation is carried out in each mould 20, thus singly produced by melten glass
Lens blank 1.
Fig. 1 represents an example of the lens blank 1 so produced.Herein, the first face R1 is to replicate lower mold forming face
21a and the face of molding, the second face R2 are the faces for replicating upper die forming face 10a and molding, and circumference 4 is to replicate body die 22
Inner peripheral surface and the face of molding.
And, the convex portion 5 shown in Fig. 2 and recess 6 are formed with the side of lens blank 1.
Furthermore, it is also possible to make lower mold forming face 21a periphery and upper die forming face 10a peripheral zone it is tapered, by will
These tapers are copied on glass, so as to be formed between the first face R1 and circumference 4 and between the second face R2 and circumference 4
Chamfered section.Such chamfered section is set in lens blank 1, in the operation behind including secondary operations, glass breakage is being prevented
Aspect be effective.
By said method, the lens blank 1 of the present invention can be produced, above-mentioned The effect of invention can be obtained.
In addition, in the case where wanting to form the convex portion 5 shown in Fig. 3 and recess 6a, 6b in 1 side of lens blank, as long as
Formed respectively by obtained by the shape of recess 6a, 6b of 1 side of lens blank, the shape transfer of convex portion 5 in body die inner peripheral surface
The convex portion 50 of the shape for arriving and recess 60.
In addition, the recess 50 of body die inner peripheral surface, convex is formed by way of with from 10 side of upper mould towards 21 side of lower mould
Portion 60, easily takes out lens blank from mould 20.
（The manufacture method of lens）
The first method of the manufacture method of the lens of the present invention is characterised by, lens blank is being carried out being ground, polished
Lens manufacture method in, the side of the lens blank 1 right is kept including using the lens blank of the invention described above
The operation is ground by first type surface.
The second method of the manufacture method of the lens of the present invention is characterised by, lens blank is being carried out being ground, polished
Lens manufacture method in, produce lens blank including by the method for the invention described above, keep the lens blank
Side the operation is ground by first type surface.
In any one mode, when the laterally grinding first type surface of lens blank 1 is kept, can utilize in lens blank
Recess 6 and/or convex portion 5 that 1 side is formed, prevent lens blank 1 and keep the keeper i.e. between chuck of lens blank 1
Skidding, the shape of lens can be processed into into desired shape reliably, and then be prevented from what is caused by above-mentioned skidding
The breakage of glass.
Known processing method can be applied in the secondary operations of lens blank 1.
That is, the side of lens blank 1 is fixed on the keeper i.e. chuck of curve generator, to lens blank 1
First type surface carry out spherical grinding, so-called corase grind.After the corase grind of two first type surfaces terminates, quilt is implemented to two first type surfaces successively
The fine ginding for referred to as refining, is then polished so as to form two optical function faces.Then, by feeling relieved come to equivalent to saturating
The peripheral part of the side of mirror blank 1 is cut, and polish is around optical axis C symmetrical lens shape.
Preferably, by the centering removing the recess 6 and/or convex portion 5 that are formed in 1 side of lens blank.I.e., preferably
Produce the lens for not having the recess 6, convex portion 5 in circumference 4.By removing recess 6 and/or convex portion 5, can install simultaneously
During fixed lens, circumference 4 is used as into positioning reference plane, makes the fixed precision of lens become high accuracy.
It is therefore preferable that the difference of height by the depth of recess 6, the height of convex portion 5 or recess 6 with convex portion 5 forms get Bi Ding
The allowance of the heart is little.
In such manner, it is possible to produce biconvex lens, planoconvex lenss, convex meniscus lens in high accuracy and on the basis of high production rate
Etc. various spherical lenss.
Alternatively, it is also possible to coating antireflection film etc. on the optical function face of lens as needed.
【Embodiment】
Next illustrated according to embodiment in more detail.
First, fluoride, phosphate, oxide are weighed, and is sufficiently mixed and as brewable material, brewable material is thrown
After carrying out heating in entering crucible, melting, carry out clarifying, homogenization, so as to obtain the melten glass of fluorphosphate glass.
In addition, it is 81.61, glass transition temperature that refractive index nd of the fluorphosphate glass is 1.49700, abbe number ν d
For 457 DEG C.
Then, using the punch-forming mold shown in Fig. 4, flow out the melten glass of above-mentioned fluorophosphate optical glass and arrive
On lower mold forming face 21a, melten glass stream is cut off with cutter blades (not shown), so as to be melted on lower mold forming face 21a
Melt glass blocks.The temperature during outflow of melten glass is 650 DEG C～680 DEG C.Then, with the melting glass on 10 pairs of lower moulds 21 of mould
Glass block carries out punching press, the cavity intramedullary expansion for making glass be surrounded in the mould 10 by, lower mould 21, body die 22, molds lens
Blank 1.In addition, being formed with the recess 50 shown in Fig. 5 and convex portion 60 in body die inner peripheral surface in advance.After punch forming, to upper
10 molding of mould, lens blank 1 is cooled to and be not removed from the molds after the temperature that external force deforms, annealed.
In addition, the concavo-convex of wavestrip shape is arranged in upper die forming face 10a, lower mold forming face 21a, the shape is copied to into lens
The first type surface of blank 1.By doing so it is possible, increasing the surface area of lens blank 1, lens blank 1 is promoted to radiate from first type surface, by
This prevents the reduction of the form accuracy caused by the contraction of the glass in cooling procedure.In addition, the concavo-convex height of wavestrip shape
Difference ratio is little by the removed allowance of secondary operations.
In addition, pressure during punch forming is 15.7KPa, the punching press time is 15 seconds, lower mould 21, body die 22, upper mould
10 temperature is respectively 420 DEG C, 430 DEG C, 460 DEG C.Lower mould 21, body die 22 heating or high-frequency induction by heater
Heating is controlled to said temperature.
So, obtain the lens blank 1 of following size：External diameterFor 54.1mm, center wall thickness t1 is 8.5mm, wall thin section
Thickness t2 be 1.8mm, the first first type surface（First face R1）Radius of curvature be+74.5mm, the second first type surface（Second face R2）'s
Radius of curvature is+370mm.The chamfering of 0.5mm is set between the first first type surface and side, the second first type surface and side it
Between arrange 0.5mm chamfering, side formed recess 6 and convex portion 5 difference of height be 0.066mm～0.068mm, 6 He of recess
The spacing at intervals of 0.977mm of convex portion 5.As the difference of height ratio of the recess 6 that formed in side and convex portion 5 is in operation below
By feeling relieved, removed allowance 0.5mm is little, it is possible to fully removing recess 6 and convex portion 5 by centering.And
And, as allowance is 0.5mm, so making diameter reduce 1.0mm by centering.
During punch forming, the temperature of body die is set as into said temperature so that glass reaches body die inner peripheral surface
When sharp cool down and viscosity rise, glass can be made into the inboard less than the recess 50 formed in body die inner peripheral surface.
As a result, the top of the convex portion 5 of 1 side of lens blank becomes Free Surface, it is not prismatic and circularity can be carried.
The temperature of punch-forming mold is controlled by above-mentioned, can make taking-up lens blank to be played from punch forming
Amount of contraction till 1, mould 20 is less than the amount of contraction of glass.As a result, during lens blank 1 is cooled down, lens
The convex portion 5 of 1 side of blank is easily pulled down from the recess 50 of body die inner peripheral surface, more easily can take out lens from mould 20
Blank 1.
The lens blank 1 of the biconvex lens shown in Fig. 1 has been produced thus.
Then, by the clamping sides of lens blank 1 on the keeper of curve generator, the first first type surface is entered
Row grinding, then releases and clamps, and uses keeper clamping side again, the second first type surface is ground after upset lens blank 1.
When two first type surfaces are ground, in workpiece（Lens blank 1）Once skid without generation and chuck between.Therefore,
Spherical grinding can be carried out to two first type surfaces with the precision for needing.
After being roughly ground using curve generator, implement successively to be referred to as fine grinding in two first type surfaces（Sand is hung
け）Fine ginding, and then be polished, form the optical function face of lens.
Then felt relieved, fully removed the recess and convex portion formed in side.
The biconvex lens so produced are arranged on into the lens barrel of photographing unit, when being shot, high picture can be obtained
The image of matter, image.
（Comparative example）
Recess, convex portion are not set in body die inner peripheral surface, removing does not form recess, this point of convex portion in lens blank side
Outward, the lens blank being made up of fluorophosphate optical glass is produced in the same manner as above-described embodiment.By the lens blank and reality
Apply example to be similarly fixed on the keeper of curve generator, when starting corase grind, workpiece and keeper occur to skid, plus
Work is interrupted, it has to from initially operation again.
After so carrying out corase grind same several times, due to the skidding between workpiece and keeper, workpiece breakage, or workpiece
Setting angle work in-process changes, it is contemplated that these situation, it is found that machining accuracy is reduced.
Industrial applicability
The lens blank of the present invention is the lens blank that can carry out good secondary operations.
Claims (32)
1. a kind of lens blank, the lens blank are for being finish-machined to the glass of lens by the cold working including polishing
Lens blank processed, it is characterised in that
The lens blank possesses：For being finish-machined to opposed two master meter in optical function face by the cold working
Face；With the side for surrounding described two first type surfaces,
In the side with recess and/or the convex portion from a main surface side towards another main surface side.
2. lens blank as claimed in claim 1, wherein,
The lens blank is in biconvex shape, plano-convex exterior shape, any shape in convex meniscus shape.
3. lens blank as claimed in claim 1, wherein,
The recess or the convex portion are formed at the complete cycle of side.
4. lens blank as claimed in claim 2, wherein,
The recess or the convex portion are formed at the complete cycle of side.
5. lens blank as claimed in claim 1, wherein,
The convex portion and the recess are formed as equally spaced throughout complete cycle.
6. lens blank as claimed in claim 2, wherein,
The convex portion and the recess are formed as equally spaced throughout complete cycle.
7. lens blank as claimed in claim 1, wherein,
The recess or the convex portion are formed at a part for side.
8. lens blank as claimed in claim 2, wherein,
The recess or the convex portion are formed at a part for side.
9. lens blank as claimed in claim 1, wherein,
, with the axis of symmetry intersected with the respective center of described two first type surfaces, the convex portion is symmetrical with described for the lens blank
In 0～60 degree of scope, the axis of symmetry and angle formed by the recess are in 0～60 degree of scope at angle formed by axle.
10. lens blank as claimed in claim 2, wherein,
, with the axis of symmetry intersected with the respective center of described two first type surfaces, the convex portion is symmetrical with described for the lens blank
In 0～60 degree of scope, the axis of symmetry and angle formed by the recess are in 0～60 degree of scope at angle formed by axle.
11. lens blanks as claimed in claim 1, wherein,
The recess or the scope for being spaced in 0.5mm～1.6mm of convex portion.
12. lens blanks as claimed in claim 2, wherein,
The recess or the scope for being spaced in 0.5mm～1.6mm of convex portion.
13. lens blanks as claimed in claim 1, wherein,
The top of the convex portion carries fillet.
14. lens blanks as claimed in claim 2, wherein,
The top of the convex portion carries fillet.
15. lens blanks as any one of claim 1～14, wherein,
Scope of the external diameter in 30mm～105mm, scope of the center wall thickness in 5mm～30mm.
16. lens blanks as any one of claim 1～14, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the scope of the thickness of the wall thin section in 1mm～20mm.
17. lens blanks as claimed in claim 15, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the scope of the thickness of the wall thin section in 1mm～20mm.
18. lens blanks as any one of claim 1～14, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the thickness (t2) of the wall thin section and the ratio of center wall thickness (t1)
(t2/t1) 1/30～1/2 scope.
19. lens blanks as claimed in claim 15, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the thickness (t2) of the wall thin section and the ratio of center wall thickness (t1)
(t2/t1) 1/30～1/2 scope.
20. lens blanks as claimed in claim 16, wherein,
The thickness (t2) of wall thin section and the ratio (t2/t1) of center wall thickness (t1) 1/30～1/2 scope.
21. lens blanks as claimed in claim 17, wherein,
The thickness (t2) of wall thin section and the ratio (t2/t1) of center wall thickness (t1) 1/30～1/2 scope.
22. lens blanks as any one of claim 1～14, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the thickness (t2) of the wall thin section and external diameterRatio
1/105～1/2 scope.
23. lens blanks as claimed in claim 15, wherein,
Outer edge is the wall thin section of wall ratio center wall thickness, the thickness (t2) of the wall thin section and external diameterRatio
1/105～1/2 scope.
24. lens blanks as claimed in claim 16, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
25. lens blanks as claimed in claim 17, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
26. lens blanks as claimed in claim 18, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
27. lens blanks as claimed in claim 19, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
28. lens blanks as claimed in claim 20, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
29. lens blanks as claimed in claim 21, wherein,
The thickness (t2) of wall thin section and external diameterRatioIn 1/105～1/2 scope.
A kind of 30. manufacture methods of lens blank, the lens blank is for enforcement includes the secondary operations for polishing by finishing
Work is characterised by into lens, the manufacture method of the lens blank,
Punch forming is carried out to melten glass using punch-forming mold, by the punch forming face of a pair of pushing against mold and main body mould
The inner peripheral surface of tool is copied on glass, wherein, the punch-forming mold possesses：Opposed the pair of pushing against mold；And institute
State body die, the body die inner peripheral surface with the recess from a pushing against mold side towards another pushing against mold
And/or convex portion.
A kind of 31. manufacture methods of lens, the manufacture method of the lens are for lens blank is carried out being ground, polished, described
The manufacture method of lens is characterised by,
The manufacture method of the lens includes following operation：Usage right requires the lens blank described in 1 or 2, keeps described
The side of the mirror blank first type surface to the lens blank is ground.
A kind of 32. manufacture methods of lens, the manufacture method of the lens are for lens blank is carried out being ground, polished, described
The manufacture method of lens is characterised by,
The manufacture method of the lens includes following operation：Lens blank is produced using the method described in claim 30, is protected
The side the first type surface to the lens blank for holding the lens blank is ground.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-110311 | 2011-05-17 | ||
| JP2011110311 | 2011-05-17 |
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| Publication Number | Publication Date |
|---|---|
| CN102785146A CN102785146A (en) | 2012-11-21 |
| CN102785146B true CN102785146B (en) | 2017-04-12 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210152460.7A Active CN102785146B (en) | 2011-05-17 | 2012-05-16 | Lens blank and producing method thereof, and producing method of lens |
| CN 201220221006 Expired - Lifetime CN202640081U (en) | 2011-05-17 | 2012-05-16 | Lens blank |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220221006 Expired - Lifetime CN202640081U (en) | 2011-05-17 | 2012-05-16 | Lens blank |
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| Country | Link |
|---|---|
| JP (1) | JP5499074B2 (en) |
| CN (2) | CN102785146B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5499074B2 (en) * | 2011-05-17 | 2014-05-21 | Ｈｏｙａ株式会社 | Lens blank, method for manufacturing the same, and method for manufacturing a lens |
| JP6364482B2 (en) * | 2014-06-03 | 2018-07-25 | 株式会社ニコン・エシロール | Manufacturing method of spectacle lens |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2186441B1 (en) * | 1972-05-29 | 1976-08-06 | Essilor Int | |
| JP4951166B2 (en) * | 2007-02-23 | 2012-06-13 | Ｈｏｙａ株式会社 | Lens blank and lens manufacturing method |
| JP2009069221A (en) * | 2007-09-10 | 2009-04-02 | Olympus Corp | Optical component |
| JP5095564B2 (en) * | 2007-09-25 | 2012-12-12 | Ｈｏｙａ株式会社 | Mold, method for manufacturing glass molded body using the mold, and method for manufacturing optical element |
| CN102216812A (en) * | 2008-11-19 | 2011-10-12 | 柯尼卡美能达精密光学株式会社 | Aspheric lens manufacturing method |
| JP5499074B2 (en) * | 2011-05-17 | 2014-05-21 | Ｈｏｙａ株式会社 | Lens blank, method for manufacturing the same, and method for manufacturing a lens |
-
2012
- 2012-05-08 JP JP2012106569A patent/JP5499074B2/en active Active
- 2012-05-16 CN CN201210152460.7A patent/CN102785146B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN202640081U (en) | 2013-01-02 |
| JP5499074B2 (en) | 2014-05-21 |
| CN102785146A (en) | 2012-11-21 |
| JP2012254919A (en) | 2012-12-27 |
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