CN105751031B - A kind of processing method of plano-convex cylindrical lens - Google Patents
A kind of processing method of plano-convex cylindrical lens Download PDFInfo
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- CN105751031B CN105751031B CN201610232674.3A CN201610232674A CN105751031B CN 105751031 B CN105751031 B CN 105751031B CN 201610232674 A CN201610232674 A CN 201610232674A CN 105751031 B CN105751031 B CN 105751031B
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- cylindrical lens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/0031—Machines having several working posts; Feeding and manipulating devices
- B24B13/0037—Machines having several working posts; Feeding and manipulating devices the lenses being worked by different tools, e.g. for rough-grinding, fine-grinding, polishing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
Abstract
The invention discloses a kind of processing methods of plano-convex cylindrical lens, include the following steps:Glass fiber blank is coarsely ground into cylinder, then its cylinder is refined and polished successively, makes the cylindrical radius after polishing within the scope of the radius requirement of plano-convex cylindrical lens；Cylinder after polishing is cast into disk with plane mould, the extra cylinder of cylinder is ground to plane along cylinder axial direction, forms plano-convex cylindrical lens first sample；Plano-convex cylindrical lens first sample is demoulded, then its plane is ground and is polished successively, makes the camber of the plano-convex cylindrical lens first sample after polishing in the camber claimed range of plano-convex cylindrical lens；Cross grinding is carried out to the both ends of the plano-convex cylindrical lens first sample after polishing, obtains plano-convex cylindrical lens finished product, length is within the scope of the length requirement of plano-convex cylindrical lens；The processing method of the present invention solves the problems, such as that existing plano-convex cylindrical lens processing method precision is low low with efficiency, and this method is versatile, and size Control precision is high, and can realize the batch machining of plano-convex cylindrical lens.
Description
Technical field
The present invention relates to optical effect correction fields, and in particular to a kind of processing method of plano-convex cylindrical lens.
Background technology
Plano-convex cylindrical lens are a kind of optical conversion components that point light source can be become to linear light source, are widely used in optics instrument
The fields such as device, photoelectric sensor.With the development of science and technology aerospace, optics and electronics is contour, smart, pointed collar domain is to plano-convex column
The technical requirement of face mirror processing is higher and higher, for example, common plano-convex cylindrical lens require both ends camber difference to be less than
0.020mm, and high-precision plano-convex cylindrical lens require both ends camber difference to be less than 0.003mm.Cambered surface and plane face type, camber and
The consistency of both ends camber is to influence the key index of plano-convex cylindrical lens performance.
Currently, there are mainly two types of the processing methods of plano-convex cylindrical lens.One is use dedicated cylindrical mirror polisher lapper,
Its method is the first planar section grinding and polishing by cylindrical mirror, then the rosin paraffin that planar section melts is sticked to ready-made mould
On tool, mold is loaded on the station of lathe, does bilateral reciprocation, cylindrical mirror is axial identical as the direction of motion, and use is ready-made
Arc grinding tool is placed on cylindrical mirror blank, and grinding tool is connect with drive link does reciprocating motion in the front-back direction, such cylindrical mirror blank
Relative motion occurs between grinding tool, realize the removing of material and the cambered surface face type of grinding tool inner surface is made to be copied to cylindrical mirror, it is complete
At the cylinder partial of plano-convex cylindrical lens；This method can be with batch machining plano-convex cylindrical lens, but have the disadvantage that：(1) due to rosin
The thickness of wax size is it is difficult to ensure that uniformity, causes cylindrical mirror two-end thickness difference larger；(2) grinding tool can be sent out in grinding process
Raw abrasion, leads to that cylindrical mirror cylinder radian deviation is big, consistency is poor；(3) cylindrical mirror sticks together with mold, is not easy to size
It measures；(4) it is not suitable for the processing of circle plano-convex cylindrical lens mostly.Another method is using numerical control machining center, and method is
Blank is loaded on station, high-speed rotating bistrique and rubbing head carry out form grinding and polishing, process to cylindrical mirror
By the program in machine code control numbered；This method machining accuracy depends primarily on the control accuracy of numerical control machining center, can process and appoint
Meaning size plano-convex cylindrical lens, but a workpiece can only be once processed, time-consuming, and efficiency is low.Therefore, existing plano-convex cylindrical lens add
Work method and apparatus can not in terms of precision and production capacity simultaneously meet the needs of high-precision plano-convex cylindrical lens.
Invention content
The embodiment of the present application solves existing plano-convex cylindrical lens and adds by providing a kind of processing method of plano-convex cylindrical lens
The low problem low with efficiency of work method precision, the processing method of the application is versatile, and size Control precision is high, and can realize flat
The batch machining of convex cylindrical mirror.
In order to achieve the above objectives, the embodiment of the present application mainly provides the following technical solutions：
The embodiment of the present application provides a kind of processing method of plano-convex cylindrical lens, includes the following steps：
(1) glass fiber blank is coarsely ground into cylinder, then the cylinder of cylinder is refined and polished successively, after making polishing
Cylindrical radius is in the radius size claimed range of plano-convex cylindrical lens to be processed；
(2) cylinder after polishing is cast into disk with plane mould, is ground the extra cylinder of cylinder along cylinder axial direction
At plane, plano-convex cylindrical lens first sample is formed；Plano-convex cylindrical lens first sample is demoulded, then to the plane of plano-convex cylindrical lens first sample successively into
Row grinding and polishing, make the camber of the plano-convex cylindrical lens first sample after polishing be wanted in the camber size of plano-convex cylindrical lens to be processed
It asks in range；
(3) cross grinding is carried out to the both ends of the plano-convex cylindrical lens first sample after polishing, obtains plano-convex cylindrical lens finished product, it is described
The length of plano-convex cylindrical lens finished product is in the length dimension claimed range of plano-convex cylindrical lens to be processed.
Preferably, in the step (1), the radius ratio plano-convex cylindrical lens for the cylinder that the glass fiber blank is roughly ground
Big 0.1~the 0.5mm of required radius, body length are bigger 4~7mm than the length required by plano-convex cylindrical lens；The cylinder warp
Big 0.01~the 0.03mm of radius required by radius ratio plano-convex cylindrical lens after fine grinding.
Preferably, in the step (2), the cylinder compares plano-convex through being ground the camber of obtained plano-convex cylindrical lens first sample
Big 0.1~the 0.5mm of camber required by cylindrical mirror；The plane of the plano-convex cylindrical lens first sample is polished, at the beginning of plano-convex cylindrical lens
The camber of sample is bigger 0.01~0.03mm than the camber required by plano-convex cylindrical lens.
Preferably, the depth of parallelism between the upper and lower surface of the plane mould is less than 10 ", the plane mould
The flatness of upper surface and the flatness of lower surface be respectively less than 0.5 λ, wherein λ is flatness detection wavelength and λ=632nm.
Preferably, described the step of being cast into disk, is：Cylinder axial direction horizontal pendulum is placed on plane mould by flat heated mold
On tool, the paraffin of heating fusing is poured on plane mould, the liquid level of paraffin is made to be no more than required by plano-convex cylindrical lens
Camber waits for that paraffin is cooled and shaped.
Preferably, the step of being ground to the plane of plano-convex cylindrical lens first sample in the step (2) is：Plastics are thin
The cambered surface sealing of film and plano-convex cylindrical lens first sample is glued；Planetary piece is placed in the workspace of twin grinder, then by piano convex cylindrical
Mirror first sample is overlayed wandering star circle on planetary piece with flatting down in the card slot being put on planetary piece, and plane weight block is put into
In wandering star circle and it is pressed on plano-convex cylindrical lens first sample, after planetary piece and wandering star circle are engaged with the gear ring of twin grinder respectively,
The plane of plano-convex cylindrical lens first sample is ground using twin grinder；
Twin grinder is changed to polishing machine when being polished to the plane of plano-convex cylindrical lens first sample, is ground according to plane
Identical operating procedure is ground to be polished.
Preferably, the thickness of the planetary piece is smaller 1-3mm than the camber of plano-convex cylindrical lens first sample；On the planetary piece
Card slot is rectangle, and the length direction of the card slot is radial vertical with planetary piece, and the length of the card slot compares plano-convex cylindrical lens
The big 0.5-1mm of length of first sample, the width of the card slot are bigger 0.5-1mm than the diameter of plano-convex cylindrical lens first sample.
Preferably, the plane weight block is the disk that weight is evenly distributed, the lower surface of the plane weight block
Flatness is not more than 0.5 λ, and wherein λ is flatness detection wavelength and λ=632nm.
Preferably, the step of carrying out cross grinding in the step (3) is：First by plastic film respectively with piano convex cylindrical
The cambered surface and flat sealant of mirror first sample are closed, then using cross grinding mold by plano-convex cylindrical lens first sample it is axially vertical be fixed on it is flat
On the Grinder bench of face, it is first ground the end face of plano-convex cylindrical lens first sample, then after plano-convex cylindrical lens first sample is overturn and fixed, mill
Cut other end.
Preferably, the cross grinding mold is made of the first mold and the second mold, first mold and second
Mold is placed on the clamping of the plano-convex cylindrical lens first sample between the first mold and the second mold；It is set on the clamping face of first mold
There is a V-type straight slot from top to bottom, the fluting direction of the V-type straight slot is vertical with the lower surface of the first mold and V-type straight slot is opened
Slot bottom angle is equal under upper；The clamping face of second mold is vertical with the lower surface of the second mold.
Preferably, the material of first mold and the second mold is cast iron；First mold and the second mold
Clamping face height be 3/4~9/10 of length required by plano-convex cylindrical lens.
Preferably, the thickness of the plastic film is 0.01~0.05mm, and thickness tolerance is ± 0.003mm.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
The embodiment of the present invention reprocesses the processing side of its cambered surface by changing the plane of conventional first processing plano-convex cylindrical lens
Method and the inefficient processing method for using numerical control machining center, are first processed into cylinder, then cylinder is poured by glass fiber blank
The plane for casting disk post-processing plano-convex cylindrical lens is formed simultaneously the cambered surface of desired size, can not only improve the precision of processing, and
And batch machining can be carried out, and processing efficiency is substantially increased, it is versatile.
Description of the drawings
Fig. 1 is the flow chart of the plano-convex cylindrical lens processing method of the embodiment of the present invention；
Fig. 2 is the stereogram of the plano-convex cylindrical lens of the embodiment of the present invention；
Fig. 3 is the front view of the plano-convex cylindrical lens of the embodiment of the present invention；
Fig. 4 is the vertical view of the plano-convex cylindrical lens of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the planetary piece of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the wandering star circle of the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the first mold of cross grinding mold of the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the second mold of cross grinding mold of the embodiment of the present invention.
Specific implementation mode
It is of the invention to reach the technological means and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Specific implementation mode, structure, feature and its effect applied according to the present invention is described in detail such as in attached drawing and preferred embodiment
Afterwards.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily the same embodiment.In addition, one or more
Special characteristic, structure or feature in a embodiment can be combined by any suitable form.
The embodiment of the present invention is according to processing flow as shown in Figure 1, with length L for 50 ± 0.020mm, radius R is 5 ±
The processing dimension and precision that 0.002mm, camber H are 6 ± 0.002mm carry out batch machining, wherein plano-convex column to plano-convex cylindrical lens
The structure of face mirror is as shown in Figure 2, Figure 3 and Figure 4, and processing method specifically includes following steps：
(1) cuboid glass fiber blank is loaded between the head frame of cylindrical grinder and tailstock, is sintered using #150 resins
Skive is ground to cylinder, and the radius of cylinder is 5.500 ± 0.002mm after grinding, and length is 55 ± 0.1mm；By #
150 resin sintered diamond grinding wheels are changed to #400 resin sintered diamond grinding wheels, are refined to the cylinder of cylinder, after fine grinding
The radius of cylinder is 5.010 ± 0.002mm；#400 resin sintered diamond grinding wheels are changed to wool felt buffing wheel, to cylinder
Cylinder be polished, after polishing the radius of cylinder be 5 ± 0.002mm, wherein polishing used in polishing slurries be preferably oxygen
Change cerium polishing powder and pure water by volume 1:2-1:The mixture of 4 compositions.
(2) cylinder after polishing is cast into disk with plane mould, step is：Plane mould is put on hot plate,
The temperature of plane mould is heated to 60 DEG C -90 DEG C, multiple cylinder axial direction horizontal pendulums are placed on plane mould, heating is melted
Paraffin be poured on plane mould, with baffle enclosing in plane mould surrounding, prevent the paraffin outflow of fusing, control the stone poured into
Wax amount makes the liquid level of paraffin be no more than the camber required by plano-convex cylindrical lens, and plane mould is removed after paraffin cooling and shaping
Have the baffle of surrounding, that is, complete to be cast into disk, used in the depth of parallelism of upper and lower surface of plane mould be less than
10 ", the flatness of the upper surface of plane mould and the flatness of lower surface are respectively less than 0.5 λ, and wherein λ is flatness detection wave
The thickness of long and λ=632nm, plane mould can be 10~20mm, and the material of plane mould is cast iron.
The above-mentioned cylinder for being cast into disk and plane mould are placed on the workbench of surface grinding machine, the electricity of surface grinding machine is opened
Magnetic-disc switchs, and plane mould is made firmly to inhale on surface grinding machine；Using #80 resin sintered diamond grinding wheels along cylinder axial direction
The extra cylinder of cylinder is ground to plane by direction, is formed plano-convex cylindrical lens first sample, during grinding, while being detected and calculating
The remaining camber of plano-convex cylindrical lens first sample makes the camber of plano-convex cylindrical lens first sample after grinding reach 6.2 ± 0.002mm, wherein flat
The detection of the remaining camber of convex cylindrical mirror first sample and computational methods are：Plane mould and cylinder remaining portion are measured with survey tool
Overall thickness, then subtract the thickness of known plane mould, obtain the thickness of cylinder remaining portion, is i.e. plano-convex cylindrical lens first sample
Remaining camber.
Above-mentioned plane mould is heated, plano-convex cylindrical lens first sample is made to demould, by plastic film and plano-convex cylindrical lens first sample
Cambered surface sealing is glued；Planetary piece is placed in the workspace of twin grinder, then plano-convex cylindrical lens first sample is put into flatting down
In card slot on planetary piece, wandering star circle is overlayed on planetary piece, plane weight block is put into wandering star circle and is pressed on plano-convex column
On the mirror first sample of face, after planetary piece and wandering star circle are engaged with the gear ring of twin grinder respectively, using twin grinder to plano-convex
The plane of cylindrical mirror first sample is ground.Twin grinder is changed to polishing machine after grinding, according to plane lapping phase
Same operating procedure is again polished the plane of plano-convex cylindrical lens first sample, i.e.,：Again by not used plastic film and plano-convex
The cambered surface sealing of cylindrical mirror first sample is glued；Planetary piece is placed in the workspace of polishing machine, then by plano-convex cylindrical lens first sample with plane
It is put into downward in the card slot on planetary piece, wandering star circle is overlayed on planetary piece, plane weight block is put into wandering star circle and is pressed
In on plano-convex cylindrical lens first sample, after planetary piece and wandering star circle are engaged with the gear ring of polishing machine respectively, using polishing machine to plano-convex
The plane of cylindrical mirror first sample is polished.The camber of plano-convex cylindrical lens first sample is 6.02 ± 0.002mm after wherein grinding, after polishing
The camber of plano-convex cylindrical lens first sample is 6 ± 0.002mm.The structure of above-mentioned planetary piece and wandering star circle difference is as shown in Figure 5 and Figure 6,
The planetary piece is the disk that circumference is equipped with gear and on piece is equipped with the card slot that two sides communicates, and wandering star circle is that circumference is equipped with gear
Annulus, the thickness of the planetary piece is smaller 1-3mm than the camber of plano-convex cylindrical lens first sample；Card slot on planetary piece is rectangle and is in
Surrounding circulating type is symmetrically distributed on planetary piece, the length direction of the card slot and radial vertical, the number of the card slot of planetary piece
Depending on the size of plano-convex cylindrical lens, the length of card slot is bigger 0.5-1mm than the length of plano-convex cylindrical lens first sample, card slot
Width is bigger 0.5-1mm than the diameter of plano-convex cylindrical lens first sample；The thickness of above-mentioned wandering star circle can be 10~15mm, and internal diameter compares outer diameter
Small 20~30mm；The diameter of above-mentioned planetary piece and wandering star circle it is equal and it is equal can with the gear ring of twin grinder and polishing machine coincide,
The material of the planetary piece and wandering star circle can be the rigid plastics such as polytetrafluoroethylene (PTFE), PVC, epoxy resin；Above-mentioned plane weight block
Material for the disk that weight is evenly distributed, the plane weight block is stainless steel, the flatness of the lower surface of the plane weight block
No more than 0.5 λ, wherein λ is flatness detection wavelength and λ=632nm, the internal diameter of the diameter of the plane weight block than wandering star circle
Small 1~2mm, thickness are 10~15mm.
(3) first by plastic film respectively with the cambered surface of the plano-convex cylindrical lens first sample after above-mentioned polishing and plane diaphragm seal glue
It closes, then is fixed on surface grinding machine workbench using cross grinding mold by plano-convex cylindrical lens first sample is axially vertical, first grinding is flat
The end face of convex cylindrical mirror first sample removes 2~3.5mm, then after plano-convex cylindrical lens first sample is overturn and fixed, and is ground the other end
Face, while the length of plano-convex cylindrical lens is measured with length-measuring appliance, until length reaches 50 ± 0.020mm to get to plano-convex
Cylindrical mirror finished product.
The structure of above-mentioned cross grinding mold is as shown in Figure 7 and Figure 8, and the cross grinding mold is by the first mold (such as Fig. 7 institutes
Show) and the second mold composition (as shown in Figure 8), first mold and the second mold are placed between the first mold and the second mold
Plano-convex cylindrical lens first sample clamping；The clamping face of first mold is equipped with V-type straight slot from top to bottom, which opens
Slot direction is vertical with the lower surface of the first mold and the fluting base angle of V-type straight slot is equal under upper, and fluting base angle angle can
It is 90 ° -120 °；The clamping face of second mold is vertical with the lower surface of the second mold；The material of above-mentioned first mold and the second mold
Matter is cast iron, and the clamping face height of above-mentioned first mold and the second mold is the 3/4- of the length required by plano-convex cylindrical lens
9/10, the groove depth of above-mentioned V-type straight slot ensures plano-convex cylindrical lens first sample depending on the camber required by plano-convex cylindrical lens
When cambered surface is put into slot, the plane of plano-convex cylindrical lens protrudes channel opening 1~2mm of face.
When plano-convex cylindrical lens first sample is fixed using above-mentioned cross grinding mold, the first mold is first placed on surface grinding machine
Workbench on, then be placed on plano-convex cylindrical lens first sample is axially vertical on the workbench of surface grinding machine, and by plano-convex cylindrical lens
The cambered surface of first sample is put into the V-type straight slot of the first mold, makes the cambered surface of plano-convex cylindrical lens first sample and two groove face lines of V-type straight slot
Property fitting, then the second mold is placed on the workbench of surface grinding machine, makes the clamping face and plano-convex cylindrical lens of the second mold
The plane of first sample is bonded, and is finally opened the magnetic switch of surface grinding machine workbench, is made the first mold and the second mold by flat stone mill
Bed workbench is securely sucked, to which plano-convex cylindrical lens first sample to be fixed on surface grinding machine workbench.
The embodiment of the present invention by glass fiber blank by being first processed into cylinder, then cylinder is cast into disk post-processing plano-convex column
The plane of face mirror is formed simultaneously the cambered surface of desired size, finally regrinds and cuts end face, can not only improve the precision of processing, Er Qieke
Batch machining is carried out, processing efficiency is substantially increased, it is versatile.
When glass fiber blank is processed into cylinder by the embodiment of the present invention, glass fiber blank is first coarsely ground into cylinder, is roughly ground
The big 0.1-0.5mm of radius required by the radius ratio plano-convex cylindrical lens of the cylinder arrived, in order to obtain after subsequently refining and polishing
To the radius required by plano-convex cylindrical lens, the length for the cylinder roughly ground is bigger 4-7mm than the length required by plano-convex cylindrical lens,
It is suitably sized to reach the length required by plano-convex cylindrical lens in order to be removed when follow-up cross grinding, it avoids going because of grinding
The end face of plano-convex cylindrical lens cannot be made vertical with plane except size is small, or processing efficiency is reduced because grinding removal size is big；
The cylinder that corase grinding obtains is refined and is polished successively again by the embodiment of the present invention, and the radius ratio plano-convex cylindrical lens after fine grinding are wanted
Big 0.01~the 0.03mm of radius asked, to ensure that the radius after polishing can reach the radius required by plano-convex cylindrical lens.Above-mentioned throwing
The part cylindrical surface of cylinder after light is cambered surface of the following process at plano-convex cylindrical lens, and the embodiment of the present invention is not adopted when processing cylinder
With conventional cambered surface mold, and resin sintered diamond grinding wheel and wool felt buffing wheel are directly used, ensure that plano-convex cylindrical lens
The machining accuracy of cambered surface radius and radian, consistency is high when mass simultaneous is processed, and the cylinder processed is few to being further processed into
Semicircle, semicircle or most circle plano-convex cylindrical lens are applicable in, and high in machining efficiency.The embodiment of the present invention is thick to glass fiber blank
When mill, preferred #80~#150 resins sintered diamond grinding wheel；When being refined to the cylinder of cylinder, preferably #300~#400 resins are burnt
Tie skive；When being ground the plane of plano-convex cylindrical lens, preferred #80~#150 resins sintered diamond grinding wheel.The present invention is real
Example is applied when to the polishing of the cylinder of cylinder, the preferred cerium rouge of polishing slurries of use and pure water by volume 1:2-1:4
The mixture of composition can reach the desired precision of plano-convex cylindrical lens using the polishing slurries.
The embodiment of the present invention is when being ground the plane of plano-convex cylindrical lens, by the way that cylinder is axially lain in a horizontal plane in plane mould
On carry out being cast into disk, regrind and prune except cylinder extra on cylinder, can avoid the rosin stone because using melting in conventional method
The plane of plano-convex cylindrical lens is sticked on mold by wax, and influences the consistency of plano-convex cylindrical lens two-end thickness, and the present invention is real
The processing method for applying example can while put multiple cylinders side by side is cast into disk on plane mould, and carries out batch grinding, can be real
Now to the batch machining of plano-convex cylindrical lens, the processing efficiency of plano-convex cylindrical lens is improved.The embodiment of the present invention is cast into disk and is adopted
The depth of parallelism between the upper and lower surface of plane mould is less than 10 ", and the flatness of the upper surface of plane mould and
The flatness of lower surface is respectively less than 0.5 λ, and wherein λ is flatness detection wavelength and λ=632nm, so that cylinder passes through plane mould
Tool is steadily fixed on the workbench of surface grinding machine, and keeps cylinder both ends highly consistent on surface grinding machine workbench, to
Keep the two-end thickness of the plano-convex cylindrical lens first sample processed consistent.The material of above-mentioned plane mould is cast iron, it can be achieved that passing through electricity
Plane mould is fixed on the workbench of surface grinding machine by magnetic suck, easy to operate.The embodiment of the present invention, will when being cast into disk
It after cylinder axial direction horizontal pendulum is placed on plane mould, is cast using the paraffin of heating fusing, i.e. by cylinder after paraffin cooling
Be fixed on plane mould, can realize cylinder workpiece fixation and；The liquid level of wherein paraffin is no more than
Camber required by plano-convex cylindrical lens, to avoid the cylindrical surface to be ground away is blocked.The embodiment of the present invention is by measuring plane mould
The overall thickness of tool and cylinder remaining portion, then subtract the thickness of known plane mould, you can obtain the remaining of plano-convex cylindrical lens
Camber, since the depth of parallelism between plane mould upper and lower surface is less than 10 ", only it need to ensure cylinder remaining portion two in process
End is consistent with the overall thickness of plane mould, you can the consistency of guarantee plano-convex cylindrical lens both ends camber, the plano-convex cylindrical lens it is remaining
Stay measurement and the computational methods of camber easy to operate, the machining accuracy of easily controllable plano-convex cylindrical lens camber.The embodiment of the present invention
Camber of the middle cylinder through being ground obtained plano-convex cylindrical lens first sample is bigger 0.1~0.5mm than the camber required by plano-convex cylindrical lens, with
The plane lapping and polishing for making subsequent plano-convex cylindrical lens first sample control camber within the scope of required dimensional accuracy.
The embodiment of the present invention is respectively adopted twin grinder and polishing machine and is ground to the plane of plano-convex cylindrical lens first sample
And polishing, the camber of plano-convex cylindrical lens can be controlled within the scope of required dimensional accuracy；The embodiment of the present invention grinding and
Before polishing, the cylinder of plastic film and plano-convex cylindrical lens first sample is sealed glued, is in grinding and polishing process in order to prevent, it is right
The cylinder of plano-convex cylindrical lens first sample damages；The embodiment of the present invention embeds plano-convex cylindrical lens first sample in the card slot of planetary piece
It is ground and polishes, the plane lapping of plano-convex cylindrical lens first sample and polishing can be made uniform, to make the both ends of plano-convex cylindrical lens
Camber is consistent.Card slot on above-mentioned planetary piece is rectangle, and the length of card slot is bigger than the length of plano-convex cylindrical lens first sample
The width of 0.5-1mm, card slot are bigger 0.5-1mm than the diameter of plano-convex cylindrical lens first sample, so that plano-convex cylindrical lens first sample is in planetary piece
Card slot in be kept fixed with the relative position of planetary piece, prevent from grinding and polishing uneven；The length direction and wandering star of card slot
The radial direction of piece is vertical, to ensure that the grinding at plano-convex cylindrical lens first sample both ends removes consistency of thickness.Above-mentioned wandering star circle is used for wandering star
Piece is fixed in the gear ring of twin grinder or polishing machine, and planetary piece is prevented to be subjected to displacement in gear ring.Above-mentioned plane weight block
For the disk that weight is evenly distributed, and the flatness of the lower surface of plane weight block is not more than 0.5 λ, and wherein λ is flatness detection
With wavelength and λ=632nm, keeps the pressure that the plano-convex cylindrical lens first sample in planetary piece is subject to consistent, ensure the consistent of batch machining
Property.The plane lapping and polishing method of plano-convex cylindrical lens provided in an embodiment of the present invention can realize that the batch of plano-convex cylindrical lens adds
Work improves processing efficiency.
The embodiment of the present invention is ground when the first sample to the plano-convex cylindrical lens after polishing carries out cross grinding using above-mentioned end face
It cuts mold and is fixed on plano-convex cylindrical lens first sample is axially vertical on surface grinding machine workbench, it is ensured that end face after grinding and plano-convex
The plane of cylindrical mirror is vertical.It hangs down with the lower surface of the first mold in the fluting direction of V-type straight slot on above-mentioned first mold clamping face
Directly, and the fluting base angle of V-type straight slot is equal under upper, and clamped plano-convex cylindrical lens first sample can be made to work with surface grinding machine
Platform is vertical, and preferably the fluting base angle of V-type straight slot is 90 ° -120 °, and cross grinding mold can be made securely to press from both sides plano-convex cylindrical lens first sample
It holds；The clamping face of above-mentioned second mold is vertical with the lower surface of the second mold, can make the second mold in clamping clamping face with it is flat
The plane of convex cylindrical mirror first sample is bonded, to keep clamping more secured；Preferably the first mold of the embodiment of the present invention and the second mold
Clamping face height be length required by plano-convex cylindrical lens 3/4-9/10, both can guarantee that the first mold and the second mold will
Plano-convex cylindrical lens first sample firm grip, and can avoid influencing the grinding to plano-convex cylindrical lens end face because of excessive height.First mould
The material of tool and the second mold is cast iron, it can be achieved that cross grinding mold to be fixed on to the work of surface grinding machine by electromagnetic adsorption
Make on platform, it is easy to operate.
In process, the thickness of preferably plastic film is 0.01~0.05mm to the embodiment of the present invention, is due to too thick
Plastic film have elasticity, the camber of plano-convex cylindrical lens in process can be caused inconsistent and the end face of plano-convex cylindrical lens
With plane out of plumb, too thin plastic film cannot play the protective effect to plano-convex cylindrical lens, the thickness of preferably plastic film
Tolerance is ± 0.003mm, can avoid the machining accuracy of the inconsistent influence plano-convex cylindrical lens because of plastic film thickness.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (9)
1. a kind of processing method of plano-convex cylindrical lens, which is characterized in that include the following steps：
(1) glass fiber blank is coarsely ground into cylinder, then the cylinder of cylinder is refined and polished successively, make the cylinder after polishing
Radius is in the radius size claimed range of plano-convex cylindrical lens to be processed；
(2) cylinder after polishing is cast into disk with plane mould, is ground to put down by the extra cylinder of cylinder along cylinder axial direction
Face forms plano-convex cylindrical lens first sample；Plano-convex cylindrical lens first sample is demoulded, then the plane of plano-convex cylindrical lens first sample is ground successively
Mill and polishing make the camber of the plano-convex cylindrical lens first sample after polishing require model in the camber size of plano-convex cylindrical lens to be processed
In enclosing；
(3) cross grinding is carried out to the both ends of the plano-convex cylindrical lens first sample after polishing, obtains plano-convex cylindrical lens finished product, the plano-convex
The length of cylindrical mirror finished product is in the length dimension claimed range of plano-convex cylindrical lens to be processed；
Described the step of being cast into disk is：Cylinder axial direction horizontal pendulum is placed on plane mould by flat heated mold, and heating is molten
The paraffin of change is poured on plane mould, so that the liquid level of paraffin is no more than the camber required by plano-convex cylindrical lens, is waited for that paraffin is cold
But it is molded；
The step of being ground to the plane of plano-convex cylindrical lens first sample in the step (2) be：By plastic film and piano convex cylindrical
The cambered surface sealing of mirror first sample is glued；Planetary piece is placed in the workspace of twin grinder, then by plano-convex cylindrical lens first sample with plane
It is put into downward in the card slot on planetary piece, wandering star circle is overlayed on planetary piece, plane weight block is put into wandering star circle and is pressed
In on plano-convex cylindrical lens first sample, after planetary piece and wandering star circle are engaged with the gear ring of twin grinder respectively, using twin grinding
Machine is ground the plane of plano-convex cylindrical lens first sample；
Twin grinder is changed to polishing machine when being polished to the plane of plano-convex cylindrical lens first sample, according to plane lapping phase
Same operating procedure is polished；
The step of progress cross grinding, is in the step (3)：First by the plastic film cambered surface with plano-convex cylindrical lens first sample respectively
It is closed with flat sealant, then surface grinding machine workbench is fixed on by plano-convex cylindrical lens first sample is axially vertical using cross grinding mold
On, it is first ground the end face of plano-convex cylindrical lens first sample, then after plano-convex cylindrical lens first sample is overturn and fixed, is ground other end.
2. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that in the step (1), the glass
Big 0.1~the 0.5mm of radius required by the radius ratio plano-convex cylindrical lens for the cylinder that glass blank material is roughly ground, body length is than flat
Big 4~the 7mm of length required by convex cylindrical mirror；Radius required by radius ratio plano-convex cylindrical lens of the cylinder after fine grinding is big
0.01~0.03mm.
3. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that in the step (2), the circle
Camber of the column through being ground obtained plano-convex cylindrical lens first sample is bigger 0.1~0.5mm than the camber required by plano-convex cylindrical lens；It is described flat
The plane of convex cylindrical mirror first sample is polished, and the camber of plano-convex cylindrical lens first sample is bigger by 0.01 than the camber required by plano-convex cylindrical lens
~0.03mm.
4. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that the upper surface of the plane mould
The depth of parallelism between lower surface is less than 10 ", the flatness of the upper surface of the plane mould and the flatness of lower surface are small
In 0.5 λ, wherein λ is flatness detection wavelength and λ=632nm.
5. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that the thickness of the planetary piece is than flat
The small 1-3mm of camber of convex cylindrical mirror first sample；Card slot on the planetary piece is rectangle, the length direction and wandering star of the card slot
The radial direction of piece is vertical, and the length of the card slot is bigger 0.5-1mm than the length of plano-convex cylindrical lens first sample, and the width of the card slot is than flat
The big 0.5-1mm of diameter of convex cylindrical mirror first sample.
6. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that the plane weight block is weight
The flatness of the disk being evenly distributed, the lower surface of the plane weight block is not more than 0.5 λ, and wherein λ is flatness detection wave
Long and λ=632nm.
7. the processing method of plano-convex cylindrical lens according to claim 1, which is characterized in that the cross grinding mold is by
One mold and the second mold composition, first mold and the second mold are placed on the plano-convex between the first mold and the second mold
Cylindrical mirror first sample is clamped；The clamping face of first mold is equipped with V-type straight slot from top to bottom, the fluting of the V-type straight slot
Direction is vertical with the lower surface of the first mold and the fluting base angle of V-type straight slot is equal under upper；The folder of second mold
It is vertical with the lower surface of the second mold to hold face.
8. the processing method of plano-convex cylindrical lens according to claim 7, which is characterized in that first mold and the second mould
The material of tool is cast iron；The clamping face of first mold and the second mold height is the length required by plano-convex cylindrical lens
3/4~9/10.
9. according to the processing method of claim 1-8 any one of them plano-convex cylindrical lens, which is characterized in that the plastic film
Thickness be 0.01~0.05mm, and thickness tolerance be ± 0.003mm.
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| CN107378652A (en) * | 2017-08-14 | 2017-11-24 | 福建福晶科技股份有限公司 | A kind of processing method of eccentric bent moon cylindrical mirror |
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| CN101791774B (en) * | 2009-12-25 | 2012-10-10 | 常州市好利莱光电科技有限公司 | Method for processing negative crescent optical lens |
| 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 |
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