CN102490103A - Meniscus lens and processing method therefor - Google Patents
Meniscus lens and processing method therefor Download PDFInfo
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- CN102490103A CN102490103A CN2011104248572A CN201110424857A CN102490103A CN 102490103 A CN102490103 A CN 102490103A CN 2011104248572 A CN2011104248572 A CN 2011104248572A CN 201110424857 A CN201110424857 A CN 201110424857A CN 102490103 A CN102490103 A CN 102490103A
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Abstract
The invention provides a meniscus lens and a processing method therefor. The processing method comprises the following steps: a) preparing a cylindrical optical glass blank; b) processing one side of the blank into a plane; c) processing the other side, opposite to the plane, of the blank into a first set plane through taking the plane as the standard, and conducting the first-time centering and edging through taking the first set plane or the plane; d) processing the plane into a second set plane through taking the first set plane as the standard; and e) conducting a second centering and edging through taking the first set plane or the second set plane as the standard. According to the processing method of the meniscus lens, the center aberration of the meniscus lens can be reduced, and the edge thickness difference Delta is controlled within the range less than 0.05.
Description
Technical field
The invention belongs to the optics cold processing technique, particularly a kind of optics common component---meniscus lens and processing method thereof.
Background technology
Meniscus lens manufacturing approach commonly used in the optical instrument all is to select satisfactory optical glass material for use, accomplishes through conventional optical glass cold machining process such as blanking, corase grind, correct grinding, polishings, at last only through the edging of once feeling relieved.But for the meniscus lens of nearly concentric circles or nearly same radius (or similar specification), because it is very high than other meniscus lens concerning the requirement of centre deviation, should not be by the above-mentioned conventional method edging of feeling relieved.The meniscus lens that conventional method processes, the thick difference in its limit is difficult to meet design requirement.
And; To the meniscus lens processing platform face of the nearly concentric circles that has table top or nearly same radius (or similar specification) time; Conventional method shown in the accompanying drawing 8 (a)～(d), is to make two spheres (represented that here first formation convex surface forms the situation of concave surface again, but this not being what limit in proper order) earlier for example; The recentering cylindrical grinding cuts out flat surface at last on same axle.When the flat surface width was big, conventional method was difficult to guarantee that the concave surface geometric center overlaps with part cylindrical geometric center, and the perpendicularity of flat surface and cylindrical also is difficult to guarantee.The meniscus lens that processes like this, the perpendicularity of the thick difference in limit and flat surface and cylindrical is difficult to satisfy designing requirement.
In patent documentation CN 101791774A; A kind of processing method of negative crescent optical lens is disclosed; Processing mold to be adopted does not just coil for not establishing the false of counterbore; Work piece periphery and the spherical female/convex surface of mould are nonflexible line and contact and be principal character, but do not solve the problems referred to above of prior art existence.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of high-precision meniscus lens and processing method thereof are provided.The present invention can process for the high meniscus lens of the thick poor precision prescribed degree in limit, for example requires the meniscus lens of the thick poor Δ t＜0.05mm in limit, the meniscus lens of particularly near concentric circles or nearly same radius (or similar specification).
The present invention adopts the method for carrying out twice centering edging to achieve the above object, and processing method comprises the steps: a) to prepare the step of cylindrical optic chunk glass; B) one side of said blank is processed into the step on plane; C) be benchmark with said plane, the another side relative with said plane of said blank is processed into first predetermined surface, and be benchmark carry out feeling relieved the for the first time step of edging with said first predetermined surface or said plane; D) be benchmark with said first predetermined surface, said plane be processed into the step of second predetermined surface; And e) be benchmark carry out feeling relieved the for the second time step of edging with said first predetermined surface or said second predetermined surface.
As stated; The present invention has carried out the centering edging twice altogether through the edging of respectively once feeling relieved before and afterwards in formation second predetermined surface, therefore can the thick difference in limit be controlled at the scope of Δ t＜0.05; Can reduce the centre deviation of meniscus lens, to satisfy designing requirement.And the present invention is that benchmark is processed first predetermined surface with the plane, guarantees the machining accuracy of first predetermined surface more easily.
In the processing method of meniscus lens of the present invention, process the step on said plane, comprise the step of corase grind, correct grinding and polishing; Process the step of said first predetermined surface and said second predetermined surface, comprise the step of milling, corase grind, correct grinding and polishing.
In the processing method of meniscus lens of the present invention; Process the step of said first predetermined surface; It is the step that the another side relative with said plane with said blank is processed into first predetermined surface that constitutes by concave surface with said parallel plane flat surface; Perhaps, be the step that the another side relative with said plane of said blank is processed into first predetermined surface that constitutes by concave surface.Thus, the present invention can be applicable to the processing that has flat surface and do not have the meniscus lens of flat surface simultaneously.
Wherein, The processing method of meniscus lens of the present invention; Be processed at the another side relative under the situation of first predetermined surface that constitutes by concave surface with said parallel plane flat surface with said plane with said blank; After said first predetermined surface that is made up of said flat surface and concave surface machines, carry out the edging of feeling relieved the said first time.Perhaps, after said concave surface machines, said flat surface first being processed, carry out the edging of feeling relieved the said first time.And process the step of said second predetermined surface this moment, is to be the step that benchmark is processed said second predetermined surface with said flat surface.Because flat surface is parallel to the plane, so can either improve the second predetermined surface machining accuracy, can avoid again the fineness of concave surface is damaged.
In addition, the processing method of meniscus lens of the present invention is processed under the situation of first predetermined surface that is made up of concave surface at the another side relative with said plane with said blank, after said concave surface machines, carries out the edging of feeling relieved the said first time.
In addition, in the processing method of meniscus lens of the present invention, processing the step of said second predetermined surface, is to be benchmark with said first predetermined surface, said plane is processed into the step of second predetermined surface that is made up of convex surface.Because first predetermined surface is concave surface or is made up of concave surface and flat surface, be with table top or not with the meniscus lens of table top so can process through this method.
Further, be benchmark carry out feeling relieved the for the second time step of edging with said first predetermined surface or said second predetermined surface, can obtain high-precision meniscus lens.
In addition, the present invention also comprises by the resulting product of the processing method of meniscus lens of the present invention.
In sum; According to the processing method of meniscus lens of the present invention,, carried out the centering edging altogether twice through the edging of respectively once feeling relieved before and afterwards in formation second predetermined surface; Can the thick difference in limit be controlled at the scope of Δ t＜0.05, reduce centre deviation as much as possible.In addition, the present invention can be that benchmark is processed first predetermined surface with the plane, guarantees the machining accuracy of first predetermined surface more easily.
In addition, in the processing method of meniscus lens of the present invention,, all can adopt into the mode of dish processing according to circumstances, therefore can improve working (machining) efficiency at processing plane, when processing first predetermined surface and processing second predetermined surface.
Description of drawings
Fig. 1 is the schematic flow diagram of processing method of the meniscus lens of the embodiment of the invention 1.
Fig. 2 is the part blank figure of the embodiment of the invention 1.
The semi-finished product structural representation of Fig. 3 after for the edging of feeling relieved for the first time of the embodiment of the invention 1.
The finished product structural representation of Fig. 4 after for the edging of feeling relieved for the second time of the embodiment of the invention 1.
Fig. 5 is the schematic flow diagram of processing method of the meniscus lens of the embodiment of the invention 2.
The semi-finished product structural representation of Fig. 6 after for the edging of feeling relieved for the first time of the embodiment of the invention 2.
The finished product structural representation of Fig. 7 after for the edging of feeling relieved for the second time of the embodiment of the invention 2.
Fig. 8 is the sketch map of the method for the meniscus lens of processing belt flat surface in the prior art.
The specific embodiment
Below in conjunction with specific embodiment the present invention is elaborated, the present invention uses the method for the edging of feeling relieved for twice to process nearly concentric circles meniscus lens.But, nearly concentric circles meniscus lens is a concrete embodiment, and the present invention also goes for closely the processing to the exigent meniscus lens of centre deviation with radius or similar specification.
(embodiment 1)
Fig. 1 has represented the schematic flow diagram of processing method of the meniscus lens of the embodiment of the invention 1, and Fig. 2～Fig. 4 has schematically shown the process of processing method of meniscus lens of the band flat surface of the embodiment of the invention 1.
Following flow process with reference to Fig. 1 describes.
The one side of the blank that step 11. processing is shown in Figure 2 is the plane, through corase grind, correct grinding and polishing, reaches the optical cement level until its surface smoothness, Rz=0.025 and following for example, and aperture N=-0.5, and coat very thin marine glue.
On mirror disk, the average table top of regrinding makes it and plane parallel step 13. with the plane optical cement, and less than 0.01mm, the semi-finished product that at this moment form are shown in Figure 3 until the whole edge thickness difference that coils.
In the present embodiment, represented first processing concave surface, reprocessing flat surface, the situation of the edging that carries out then feeling relieved for the first time.But the invention is not restricted to this, promptly step 12,13,14 order can change, as long as feel relieved edging after concave surface machines for the first time.For example can reprocess concave surface by first processing platform face, carry out the edging of feeling relieved the first time then, at this moment, the processing method of flat surface is that whole face is processed as the plane in fact.In addition, under the situation of the concave surface of processing earlier as shown in Figure 1, also can after the edging that carries out feeling relieved the first time, reprocess flat surface.In addition; When present embodiment carries out feeling relieved edging the first time, concave surface is bonded at the edging of feeling relieved on the centering-edging machine in step 14, can plays the effect that prevents the lens fragmentation like this; But the present invention is not limited thereto, and also can the plane be bonded at the edging of feeling relieved on the centering-edging machine.
(embodiment 2)
Fig. 5 has represented the schematic flow diagram of processing method of the meniscus lens of the embodiment of the invention 2, Fig. 6～Fig. 7 schematically shown the embodiment of the invention 2 not with the process of the processing method of the meniscus lens of platform.Following flow process with reference to Fig. 5 describes, but to wherein with the flow process of Fig. 1 in identical step omit and specify.But, in processing during not with the meniscus lens of platform, the edge thickness TE of meniscus lens should be more than 5mm, otherwise may obtain sufficiently high precision.
Wherein, With embodiment 1 identical ground; When present embodiment is felt relieved edging in the first time of step 53, concave surface is bonded at the edging of feeling relieved on the centering-edging machine, can plays the effect that prevents the lens fragmentation like this; But the present invention is not limited thereto, and also can the plane be bonded at the edging of feeling relieved on the centering-edging machine.
According to the abovementioned embodiments of the present invention; Through carrying out the centering edging twice, the sphere face inclination angle of the meniscus lens that can guarantee to be obtained reach 0.5 '～2 ' with interior (edge thickness difference 0.005～0.02, diameter of part is inequality; This numerical value can change); Conventional method then can only reach 5 '～10 ' (edge thickness difference 0.05～0.1, diameter of part is inequality, this numerical value can change).
Therefore, the present invention can be applicable to the manufacturing to the demanding meniscus lens of centre deviation.
Claims (10)
1. the processing method of a meniscus lens is characterized in that said method comprising the steps of:
A) step of preparation cylindrical optic chunk glass;
B) one side of said blank is processed into the step on plane;
C) be benchmark with said plane, the another side relative with said plane of said blank is processed into first predetermined surface, and be benchmark carry out feeling relieved the for the first time step of edging with said first predetermined surface or said plane;
D) be benchmark with said first predetermined surface, said plane be processed into the step of second predetermined surface; With
E) be benchmark carry out feeling relieved the for the second time step of edging with said first predetermined surface or said second predetermined surface.
2. the processing method of meniscus lens as claimed in claim 1, the step that it is characterized in that processing said plane comprises the step of corase grind, correct grinding and polishing; Process the step of said first predetermined surface and said second predetermined surface, comprise the step of milling, corase grind, correct grinding and polishing.
3. the processing method of meniscus lens as claimed in claim 1; It is characterized in that processing the step of said first predetermined surface, is the step that the another side relative with said plane with said blank is processed into first predetermined surface that constitutes by concave surface with said parallel plane flat surface.
4. the processing method of meniscus lens as claimed in claim 3 is characterized in that after said first predetermined surface that is made up of said flat surface and concave surface machines, carrying out the edging of feeling relieved the said first time.
5. the processing method of meniscus lens as claimed in claim 3 is characterized in that after said concave surface machines, said flat surface first being processed, carries out the edging of feeling relieved the said first time.
6. the processing method of meniscus lens as claimed in claim 3 is characterized in that processing the step of said second predetermined surface, is to be the step that benchmark is processed said second predetermined surface with said flat surface.
7. the processing method of meniscus lens as claimed in claim 1 is characterized in that processing the step of said first predetermined surface, is the step that the another side relative with said plane of said blank is processed into first predetermined surface that is made up of concave surface.
8. the processing method of meniscus lens as claimed in claim 7 is characterized in that after said concave surface machines, and carries out the edging of feeling relieved the said first time.
9. like the processing method of each described meniscus lens in the claim 1～8, it is characterized in that processing the step of said second predetermined surface, is to be benchmark with said first predetermined surface, said plane is processed into the step of second predetermined surface that is made up of convex surface.
10. meniscus lens is characterized in that:
Be by the resulting product of the processing method of each described meniscus lens in the claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110424857.2A CN102490103B (en) | 2011-12-16 | 2011-12-16 | Meniscus lens and processing method therefor |
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| CN201110424857.2A CN102490103B (en) | 2011-12-16 | 2011-12-16 | Meniscus lens and processing method therefor |
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| CN102490103A true CN102490103A (en) | 2012-06-13 |
| CN102490103B CN102490103B (en) | 2014-06-04 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111630A (en) * | 2013-01-29 | 2013-05-22 | 苏州大学 | Machining method of curved surface prism Fery prism |
| CN103212722A (en) * | 2013-04-17 | 2013-07-24 | 苏州大学 | Method for processing Fery prism |
| CN104029095A (en) * | 2014-06-18 | 2014-09-10 | 福建华科光电有限公司 | Aspheric lens decentration processing method |
| CN104290002A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Method for machining cylindrical mirror |
| CN105598749A (en) * | 2015-11-09 | 2016-05-25 | 长春博启光学玻璃制造有限公司 | Machining method and machining equipment for full-equal-thickness hemispheric and super-hemispheric sapphire fairing |
| CN106541311A (en) * | 2016-10-13 | 2017-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of processing method of wedge mirror |
| CN114310495A (en) * | 2021-12-31 | 2022-04-12 | 北京创思工贸有限公司 | Sapphire optical element processing method based on lower-swinging machine |
| WO2022252303A1 (en) * | 2021-05-31 | 2022-12-08 | 苏州大学 | Fixture and method for workpiece positioning and machining method for optical element |
| CN116442055A (en) * | 2023-04-07 | 2023-07-18 | 北京创思工贸有限公司 | Wedge lens processing method |
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| JPH02198757A (en) * | 1989-01-23 | 1990-08-07 | Olympus Optical Co Ltd | Grinding method for lens |
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| JPH01274960A (en) * | 1988-04-28 | 1989-11-02 | Matsushita Electric Ind Co Ltd | Lens processing method |
| JPH02198757A (en) * | 1989-01-23 | 1990-08-07 | Olympus Optical Co Ltd | Grinding method for lens |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111630A (en) * | 2013-01-29 | 2013-05-22 | 苏州大学 | Machining method of curved surface prism Fery prism |
| CN103111630B (en) * | 2013-01-29 | 2014-12-10 | 苏州大学 | Machining method of curved surface prism Fery prism |
| CN103212722A (en) * | 2013-04-17 | 2013-07-24 | 苏州大学 | Method for processing Fery prism |
| CN103212722B (en) * | 2013-04-17 | 2015-11-18 | 苏州大学 | A kind of processing method of fery's prism |
| CN104290002B (en) * | 2013-11-28 | 2016-08-17 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of processing method of cylindrical mirror |
| CN104290002A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Method for machining cylindrical mirror |
| CN104029095B (en) * | 2014-06-18 | 2016-08-24 | 福建华科光电有限公司 | A kind of processing method ensureing non-spherical lens center deviation |
| CN104029095A (en) * | 2014-06-18 | 2014-09-10 | 福建华科光电有限公司 | Aspheric lens decentration processing method |
| CN105598749A (en) * | 2015-11-09 | 2016-05-25 | 长春博启光学玻璃制造有限公司 | Machining method and machining equipment for full-equal-thickness hemispheric and super-hemispheric sapphire fairing |
| CN106541311A (en) * | 2016-10-13 | 2017-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of processing method of wedge mirror |
| CN106541311B (en) * | 2016-10-13 | 2018-07-13 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of processing method of wedge mirror |
| WO2022252303A1 (en) * | 2021-05-31 | 2022-12-08 | 苏州大学 | Fixture and method for workpiece positioning and machining method for optical element |
| CN114310495A (en) * | 2021-12-31 | 2022-04-12 | 北京创思工贸有限公司 | Sapphire optical element processing method based on lower-swinging machine |
| CN114310495B (en) * | 2021-12-31 | 2023-02-10 | 北京创思工贸有限公司 | Sapphire optical element processing method based on lower-swinging machine |
| CN116442055A (en) * | 2023-04-07 | 2023-07-18 | 北京创思工贸有限公司 | Wedge lens processing method |
| CN116442055B (en) * | 2023-04-07 | 2024-01-30 | 北京创思工贸有限公司 | Wedge lens processing method |
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