CN109267013B

CN109267013B - High-precision optical lens processing technology and coating device thereof

Info

Publication number: CN109267013B
Application number: CN201811096671.7A
Authority: CN
Inventors: 崔王斌
Original assignee: Nanjing Koan Electro Optics Co ltd
Current assignee: Nanjing Koan Electro Optics Co ltd
Priority date: 2018-09-19
Filing date: 2018-09-19
Publication date: 2020-07-28
Anticipated expiration: 2038-09-19
Also published as: CN109267013A

Abstract

The invention discloses a high-precision optical lens processing technology and a coating device thereof, which are applied to the field of lens processing, and the technical scheme is as follows: the method comprises the following steps: the method comprises the following steps: grinding the optical lens into a preset size by a polishing machine; step two: cleaning the ground optical lens in an ultrasonic cleaning machine for 5-10 minutes; step three: taking out the optical lens, manually observing whether stains remain on the surface of the optical lens, if yes, performing the second step again, and if no stains remain, performing the fourth step; step four: loading an optical lens on a clamp, and then putting the clamp into a vacuum environment for evaporation coating; step five: detecting the finished optical lens, warehousing qualified products, and reprocessing or destroying unqualified products; has the technical effects that: can ensure the cleanness of the optical lens and improve the light transmittance, thereby obtaining the optical lens with better quality.

Description

High-precision optical lens processing technology and coating device thereof

Technical Field

The invention relates to the field of lens processing, in particular to a high-precision optical lens processing technology and a coating device thereof.

Background

At present, high-precision optical lenses in the market are generally coated to improve various performances of the optical lenses.

Chinese patent with publication number CN107686971A discloses a multilayer high-light-transmittance durable coating process for a lens, which comprises the following steps: selecting a lens, and determining the refractive index and the structure of a coating film system to be A + (B + C) m + D + E; wherein the layer A is SiO2, the layer B and the layer C are metal oxides or fluorides, D is an inner protective layer, and E is an outer protective layer; plating an A layer by using a sputtering method; coating each layer B and C by evaporation; and plating the D layer and the E layer by an electron beam evaporation method.

However, in the implementation of such a coating process, the problem of low yield and poor quality usually occurs due to the contamination of dust on the surface of the optical lens, and therefore, there is a need in the industry for a processing process capable of improving the yield and quality of the optical lens.

Disclosure of Invention

The invention aims to provide a high-precision optical lens processing technology and a coating device thereof.

The invention aims at: provides a high-precision optical lens processing technology.

The second purpose of the invention is that: provides a film coating device for a high-precision optical lens processing technology.

The invention aims to be realized by the following technical scheme: a high-precision optical lens processing technology comprises the following steps:

the method comprises the following steps: grinding the optical lens into a preset size by a polishing machine;

step two: cleaning the ground optical lens in an ultrasonic cleaning machine for 5-10 minutes;

step three: taking out the optical lens, manually observing whether stains remain on the surface of the optical lens, if yes, performing the second step again, and if no stains remain, performing the fourth step;

step four: loading an optical lens on a clamp, and then putting the clamp into a vacuum environment for evaporation coating;

step five: and (4) detecting the finished optical lens, warehousing qualified products, and reprocessing or destroying unqualified products.

Through the technical scheme, an operator firstly grinds the optical lens into a preset size, then cleans the optical lens through an ultrasonic cleaning machine so as to wash away stains on the surface of the optical lens, then ensures the cleanness of the surface of the optical lens through manual observation, and finally coats the optical lens through vacuum evaporation, so that the cleanness of the optical lens can be ensured, the light transmittance can be improved, the optical lens with better quality can be obtained, and the yield can be improved; and finally, detecting the finished optical lenses, warehousing qualified products, and reprocessing or destroying unqualified products, so that the qualification rate of the optical lenses which are out of the warehouse can be ensured, and the unqualified products are prevented from being mixed in the optical lenses.

The invention is further configured to: before the fourth implementation step, loading a single optical lens on a clamp, then placing the clamp in a vacuum environment for evaporation coating, detecting the quality of a finished product, and if the quality meets the requirement, performing batch evaporation coating on the optical lens.

Through the technical scheme, before batch coating, an operator firstly carries out a single-chip experiment, whether the design of the film system is reasonable can be clearly determined, and if the design is reasonable, batch production is carried out, so that the possibility that optical lenses are unqualified in batch due to unreasonable design of the film system can be reduced.

The invention is further configured to: in the fourth step, the fixture drives the optical lens to revolve around the central axis of the fixture, and the optical lens rotates in the fixture.

Through the technical scheme, during evaporation coating, the optical lenses revolve while rotating, so that each optical lens can be in more uniform contact with steam, the coating uniformity of the optical lenses is improved, and the difference between the optical lenses in the same batch is reduced.

The second purpose of the invention is realized by the following technical scheme: a film coating device comprises a vacuum chamber and a driving motor arranged on the vacuum chamber and used for driving a clamp to revolve; a clamp: including the disc that sets up along the horizontal direction, set up a plurality of through-holes on the disc, be used for placing the ring of placing of optical lens and be used for the drive to place the synchronizing part of ring rotation, the center of disc is connected on driving motor's output, it rotates to connect on the through-hole inner wall along the horizontal direction to place the ring.

According to the technical scheme, when evaporation coating is needed, an operator places the optical lens in the placing ring, then controls the driving motor to work, controls the disc to rotate at the moment, enables the optical lens to revolve, and controls the placing ring to rotate through the synchronizing piece, so that the optical lens rotates; the optical lens revolves in the vacuum chamber while rotating, and the coating uniformity of the optical lens can be improved.

The invention is further configured to: a plurality of balls are embedded in the inner wall of the through hole along the periphery of the placing ring, and a rolling groove for embedding the balls is formed in the outer edge of the placing ring.

Through above-mentioned technical scheme, place the ring and rotate through ball and through-hole inner wall and be connected, reduced greatly and placed the frictional force between ring and the through-hole inner wall to make and place the ring more smooth and easy when rotating, reduce and place the dead possibility of ring card.

The invention is further configured to: the synchronous piece comprises an inner gear ring and an autorotation gear ring, the outer edge of the inner gear ring is connected to the inner wall of the vacuum chamber and coaxially arranged with the output end of the driving motor, the inner wall of the autorotation gear ring is coaxially connected to the outer edge of the placing ring, and the outer edge teeth of the autorotation gear ring are meshed with the inner edge teeth of the inner gear ring.

Through the technical scheme, the driving motor drives the disc to rotate when working, at the moment, the outer edge of the autorotation gear ring connected with the placing ring is meshed with the inner edge of the inner gear ring, so that the autorotation gear ring walks around the inner edge of the inner gear ring, at the moment, the autorotation gear ring drives the placing ring to autorotate together, and the optical lenses in the placing ring also autorotate together; in the process, the rotation of the optical lens is completely driven by the rotation of the disc, so that the power is saved, the operation is convenient and fast, when the driving motor stops working, the rotation and the revolution of the optical lens stop at the same time, and the stop of the rotation and the revolution does not need to be controlled respectively.

The invention is further configured to: the synchronous piece comprises a rolling way, a rolling ring and an anti-skidding sleeve, the outer edge of the rolling way is connected to the inner wall of the vacuum chamber and is coaxially arranged with the output end of the driving motor, the inner wall of the rolling ring is coaxially connected to the outer edge of the placing ring, and the anti-skidding sleeve is sleeved on the outer edge of the rolling ring and is abutted to the inner edge of the rolling way.

According to the technical scheme, the driving motor drives the disc to rotate when working, and the rolling ring connected with the placing ring is abutted against the inner edge of the roller path, so that the rolling ring moves on the inner edge of the roller path when the disc rotates, and the placing ring and the optical lens rotate; in the process, the rotation of the optical lens is completely driven by the rotation of the disc, so that the power is saved, the operation is convenient and fast, when the driving motor stops working, the rotation and the revolution of the optical lens stop at the same time, and the stop of the rotation and the revolution does not need to be controlled respectively; the anti-slip sleeve improves the friction force between the rolling ring and the raceway, so that the rolling ring can stably walk on the inner edge of the raceway, the possibility of slipping between the rolling ring and the raceway is reduced, the abrasion between the rolling ring and the raceway is reduced, the possibility of generating a gap between the rolling ring and the raceway due to the abrasion is reduced, and the walking stability of the rolling ring in the raceway is further improved.

The invention is further configured to: through-hole on the disc extends toward driving motor's output direction has a plurality ofly and forms one, every row placing on the through-hole ring outer fringe all is equipped with and rolls the ring, every adjacent two it contradicts each other to roll between the ring outer fringe.

Through the technical scheme, the rolling rings are mutually abutted, so that when the disc rotates, the rolling rings can rotate under the action of mutual friction force, and the optical lens is driven to rotate; the arrangement greatly improves the loading capacity of the disc to the optical lens, so that more optical lenses can be coated at one time, the production efficiency is improved, and the energy loss is reduced.

The invention is further configured to: the utility model discloses a vacuum chamber, including vacuum chamber, disc, drive motor, grid board, first drive shaft, first conical tooth, grid net, second conical tooth, the vacuum chamber is equipped with the grid board in one side that the disc deviates from drive motor, the outer fringe of grid board rotates to be connected on the inner wall of vacuum chamber, the disc is equipped with first drive shaft towards one side of grid board, coaxial coupling has first conical tooth in the first drive shaft, the grid net is connected with the second drive shaft, coaxial coupling has the second conical tooth in the second drive shaft, the vacuum chamber internal rotation is connected with the switching-over tooth that.

Through the technical scheme, when the driving motor drives the disc to rotate, the grating plate rotates under the matching relation of the first conical teeth, the second conical teeth and the reversing teeth, the rotating direction of the grating plate is opposite to that of the disc, and the grating plate can uniformly stir gas in the vacuum chamber, so that a film can be more uniformly plated on the optical lens, and the film plating quality of the optical lens is improved.

The invention is further configured to: the grid is netted and is equipped with the safety cover, first toper tooth, second toper tooth and second drive shaft all are located the safety cover, the one end that the grid was netted is worn to establish the safety cover to first drive shaft, the switching-over tooth passes through the third drive shaft and rotates the connection on the safety cover inner wall.

Through the technical scheme, the protective cover can play a role in protecting the first conical teeth, the second conical teeth and the reversing teeth, so that the fault occurrence rate can be reduced, and the stability of the grid net during rotation is improved.

In conclusion, the invention has the following beneficial effects:

1. the cleanness of the optical lens can be ensured, the light transmittance is improved, and the yield is improved, so that the optical lens with better quality is obtained;

2. the driving motor can drive the optical lens to rotate and revolve when working, thereby improving the uniformity of the optical lens during film coating and improving the film coating quality of the optical lens.

Drawings

FIG. 1 is a process flow diagram of example 1.

FIG. 2 is a schematic view of the entire structure of embodiment 2.

Fig. 3 is a schematic structural view for embodying the synchronizing member in embodiment 2.

Fig. 4 is a schematic structural diagram of embodiment 2 for embodying a commutation tooth.

Fig. 5 is an enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic structural view of embodiment 3 for embodying the synchronizing member.

Reference numerals: 1. a vacuum chamber; 2. a drive motor; 3. a clamp; 31. a disc; 311. a through hole; 32. placing a ring; 321. a ball bearing; 322. rolling a groove; 4. a synchronizing member; 41. an inner gear ring; 42. a self-rotating gear ring; 43. a raceway; 44. rolling a ring; 45. an anti-slip sleeve; 5. a grid plate; 51. a second drive shaft; 52. a second tapered tooth; 6. a first drive shaft; 61. a first conical tooth; 7. a reversing tooth; 8. a protective cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: a high-precision optical lens processing technology is disclosed, as shown in figure 1, an operator firstly grinds an optical lens into a preset size through a polishing machine, then puts the ground optical lens into an ultrasonic cleaning machine, starts the ultrasonic cleaning machine to clean the optical lens for 5-10 minutes, and enables stains on the surface of the optical lens to be cleaned.

As shown in fig. 1, the ultrasonic cleaning machine is stopped, the optical lens is taken out from the ultrasonic cleaning machine and manually observed under strong light, whether stains are left on the surface of the optical lens is checked, if any stains are left, the optical lens is put back into the ultrasonic cleaning machine for cleaning again, if no stains are left, the optical lens is loaded on a clamp, and through manual observation under strong light, the surface quality of the optical lens loaded on the clamp can be ensured to be qualified, so that the optical lens with unqualified surface quality is prevented from entering the next step, and unnecessary time and energy waste are avoided.

Referring to fig. 1, after an operator loads an optical lens on a fixture, the fixture is placed in a vacuum environment for evaporation coating, and the coating time and temperature are determined according to the required film system design. After the coating is finished, the operator takes out the optical lens, detects whether the coating quality of the finished optical lens meets the requirement, and if not, the designer carries out the design of the film system again.

As shown in fig. 1, if the coating quality meets the requirement, the operator loads the optical lens into the fixture, and then puts the fixture into the vacuum chamber for batch coating, so as to realize high-efficiency production. In order to improve the uniformity of the coating, the clamp drives the optical lens to revolve around the central shaft of the clamp during coating, and meanwhile, the optical lens rotates in the clamp, so that the possibility of uneven coating thickness of the optical lens in the same batch caused by uneven film steam in the vacuum chamber can be reduced, and the coating quality of the optical lens is improved.

As shown in fig. 1, after the optical lens is coated, the operator takes out the fixture, carefully takes out the coated optical lens, and detects the finished optical lens, if the finished optical lens is qualified, the finished optical lens is put in storage, if the finished optical lens is not qualified, the finished optical lens is judged whether to be reprocessed or not, if not, the finished optical lens is destroyed, and the optical lens is ground again, so that optical lenses with other sizes can be produced, and the waste of resources is reduced. All the steps are carried out in a dust-free environment to prevent dust from polluting the optical lens.

Example 2: a coating device for a high-precision optical lens processing technology is disclosed, as shown in figures 2 and 3, and comprises a vacuum chamber 1, a clamp 3 (as shown in figure 5) and a driving motor 2 arranged on the vacuum chamber 1, wherein the clamp 3 comprises a disk 31 arranged along the horizontal direction, and the output end of the driving motor 2 is fixedly connected to the center of the disk 31, so that the driving motor 2 can drive the disk 31 to rotate around the central axis of the output end of the driving motor 2 when in work.

As shown in fig. 4 and 5, the disc 31 is equally divided into a plurality of through holes 311 along the outer edge of the disc 31, the placing ring 32 is disposed in the through holes 311 along the horizontal direction, a plurality of balls 321 are embedded in the inner wall of the through holes 311 along the circumference of the placing ring 32, a rolling groove 322 for partially embedding the balls 321 is disposed on the outer edge of the placing ring 32, so that the placing ring 32 can smoothly rotate in the through holes 311, and a synchronizing member 4 (as shown in fig. 3) for driving the placing ring 32 to rotate is disposed on the disc 31.

As shown in fig. 4 and 5, the synchronizer 4 (as shown in fig. 3) includes a rotation gear ring 42 fixedly connected to the outer edge of the placing ring 32 and coaxial with the placing ring 32, an inner gear ring 41 is welded on the inner wall of the vacuum chamber 1 along the periphery of the disk 31, and one side of the inner gear ring 41 facing the disk 31 is meshed with the outer edges of all the rotation gear rings 42, so that when the driving motor 2 drives the disk 31 to revolve, the rotation gear ring 42 moves around the inner gear ring 41, and at this time, the rotation gear ring 42 drives the placing ring 32 to rotate together, so that after an operator places an optical lens in the placing ring 32, the optical lens in the placing ring 32 also rotates together with the placing ring 32, and the purpose of synchronous rotation and revolution of the optical lens in the film plating process is achieved, so as to improve the uniformity of the film plating of the optical lens.

As shown in fig. 3 and 4, during the revolution of the optical lens, the rotation of the optical lens is completely driven by the rotation of the disc 31, so that the power is saved and the operation is convenient, when the driving motor 2 stops working, the rotation and the revolution of the optical lens stop at the same time, and the rotation and the revolution do not need to be controlled to stop respectively, so that the operation is also convenient.

As shown in fig. 3 and 4, a first driving shaft 6 coaxial with the output end of the motor is fixedly arranged on one side of the disc 31 away from the driving motor 2, a grating plate 5 is arranged on one side of the disc 31 away from the driving motor 2 of the vacuum chamber 1, the outer edge of the grating plate 5 is rotatably connected to the inner wall of the vacuum chamber 1, a second driving shaft 51 is fixedly arranged on one side of the grating net facing the disc 31, the second driving shaft 51 is coaxial with the grating net, a first tapered tooth 61 and a second tapered tooth 52 are respectively and coaxially connected to the first driving shaft 6 and the second driving shaft 51, a protective cover 8 for simultaneously covering the first tapered tooth 61 and the second tapered tooth 52 is arranged on the grating net, a third driving shaft is rotatably connected to the inner wall of the protective cover 8, a reversing tooth 7 is coaxially connected to the third driving shaft, the reversing tooth 7 is simultaneously meshed with the first tapered tooth 61 and the second tapered tooth 52, so that when the disc 31, The reversing teeth 7 and the second conical teeth 52 drive the grid net to rotate reversely, so that the film steam in the vacuum chamber 1 is uniformly stirred and rises upwards, and the film coating uniformity of the optical lens is further improved.

The action process is as follows: when the optical lenses need to be coated, an operator firstly loads the optical lenses in the placing ring 32 one by one, then closes the vacuum chamber 1, starts the driving motor 2, the driving motor 2 drives the disk 31 and the optical lenses to revolve, at the moment, the outer edge of the rotation gear ring 42 connected with the placing ring 32 is meshed with the inner edge of the inner gear ring 41, so that the rotation gear ring 42 moves around the inner edge of the inner gear ring 41, the rotation gear ring 42 drives the placing ring 32 to rotate together, the optical lenses in the placing ring 32 also rotate together, and the revolution and rotation of the optical lenses in the coating process are quickly and conveniently realized.

When the disk 31 rotates, the matching relation of the first conical teeth 61, the second conical teeth 52 and the reversing teeth 7 drives the grating net to reversely rotate relative to the disk 31, and at the moment, the grating plate 5 can uniformly stir the gas in the vacuum chamber 1, so that the film can be more uniformly coated on the optical lens, and the coating quality of the optical lens is improved.

Example 3: a coating device for a high-precision optical lens processing technology is different from the coating device in embodiment 2 in that, as shown in figure 6, a synchronous piece 4 comprises a roller path 43 welded on the inner wall of a vacuum chamber 1 along the periphery of a disc 31, and the roller path 43 is coaxially arranged with the output end of a driving motor 2. Three through holes 311 arranged along the periphery of the disc 31 extend towards the output end of the driving motor 2 to form a row, the outer edge of the placing ring on each row of through holes 311 is fixedly provided with a rolling ring 44, the outer wall of the rolling ring 44 is sleeved with an anti-skidding sleeve 45, two adjacent rolling rings 44 on the same row are mutually abutted, and the rolling ring 44 at the outermost edge of the disc 31 is abutted against the inner edge of the roller path 43.

As shown in fig. 6, when the driving motor 2 drives the disc 31 to rotate, the rolling ring 44 located at the outermost edge of the disc 31 moves on the inner edge of the raceway 43, and the other rolling rings 44 roll synchronously by the interference force between the adjacent rolling rings 44, thereby automatically driving the optical lenses in all the placing rings to rotate. The arrangement greatly improves the loading capacity of one disc 31, thereby improving the production efficiency and reducing the energy consumption.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A coating device for a high-precision optical lens processing technology is characterized in that: comprises a vacuum chamber (1) and a driving motor (2) which is arranged on the vacuum chamber (1) and is used for driving a clamp (3) to revolve;

a clamp (3): the automatic positioning device comprises a disc (31) arranged along the horizontal direction, a plurality of through holes (311) formed in the disc (31), a placing ring (32) used for placing optical lenses and a synchronizing piece (4) used for driving the placing ring (32) to rotate, wherein the center of the disc (31) is connected to the output end of a driving motor (2), and the placing ring (32) is rotatably connected to the inner wall of the through holes (311) along the horizontal direction; a plurality of balls (321) are embedded in the inner wall of the through hole (311) along the periphery of the placing ring (32), and a rolling groove (322) for partially embedding the balls (321) is formed in the outer edge of the placing ring (32);

the synchronous piece (4) comprises a rolling way (43), a rolling ring (44) and an anti-skidding sleeve (45), wherein the outer edge of the rolling way (43) is connected to the inner wall of the vacuum chamber (1) and coaxially arranged with the output end of the driving motor (2), the inner wall of the rolling ring (44) is coaxially connected to the outer edge of the placing ring (32), and the anti-skidding sleeve (45) is sleeved on the outer edge of the rolling ring (44) and is abutted to the inner edge of the rolling way (43).

2. The plating device according to claim 1, wherein: through-hole (311) on disc (31) extend toward the output direction of driving motor (2) have a plurality ofly and form one row, every row place ring (32) outer fringe on through-hole (311) and all be equipped with and roll ring (44), every adjacent two mutually contradict between rolling ring (44) outer fringe.

3. The plating device according to claim 2, wherein: vacuum chamber (1) is equipped with grid plate (5) in one side that disc (31) deviates from driving motor (2), the outer fringe of grid plate (5) is rotated and is connected on vacuum chamber (1) inner wall, disc (31) are equipped with first drive shaft (6) towards one side of grid plate (5), coaxial coupling has first toper tooth (61) on first drive shaft (6), grid net is connected with second drive shaft (51), coaxial coupling has second toper tooth (52) on second drive shaft (51), vacuum chamber (1) internal rotation is connected with and first toper tooth (61) and second toper tooth (52) the switching-over tooth (7) of meshing simultaneously.

4. The plating device according to claim 3, wherein: be equipped with safety cover (8) on the grid net, first toper tooth (61), second toper tooth (52) and second drive shaft (51) all are located safety cover (8), the one end that grid net was kept away from in safety cover (8) is worn to establish in first drive shaft (6), switching-over tooth (7) are connected on safety cover (8) inner wall through the rotation of third drive shaft.