A germanium lens processing device and a processing method

Abstract

The application discloses a germanium lens processing equipment and a processing method, and relates to the field of germanium lens processing equipment, and aims to improve the utilization rate of germanium single crystal, reduce germanium sludge, and save cost. The processing equipment comprises a support frame, a fixing piece, a first driving block, a second driving block, a lead screw, a scale dial, a first motor, a second motor, a third motor and a speed reducer; the support frame is provided with an upper layer support table and a lower layer support table; the fixing piece, the first driving block and the second driving block are sequentially arranged on the upper layer support table; the fixing piece is connected to the upper layer support table, one end of the lead screw is fixedly connected with the scale dial, the other end is threadedly connected with the fixing piece and the first driving block; the first motor is installed on the first driving block, and a clamp is arranged at the end of the rotating shaft of the first motor; the second motor is installed on the second driving block, and a spherical blade is arranged at the end of the rotating shaft of the second motor; the third motor and the speed reducer are connected and are both installed on the lower layer support table, and the rotating shaft of the speed reducer penetrates through the upper layer support table and is connected with the second driving block.

Description

Technical Field

[0001] The invention relates to germanium lens processing equipment and a processing method, belonging to the technical field of germanium infrared optics. Background Art

[0002] Germanium (Ge), a rare metal belonging to the category of dispersed metals, is a key semiconductor material widely used in infrared optics, optical fiber, and solar energy. Within infrared optics, the military sector holds an approximately 85%-88% market share. Since its discovery, germanium's downstream applications have been constantly evolving. Around the 1960s, metallic germanium dominated the global semiconductor device industry. After the 1970s, with advances in semiconductor silicon production technology and the advent of large-scale integrated circuits, its use in the semiconductor field declined. However, with the advancement of technology, germanium has gradually begun to be used in infrared optics, optical fiber, and solar energy. The development of these new fields has propelled the germanium industry into a new golden period of development. Currently, germanium is primarily used in solar cells, infrared optics, optical fiber, PET catalysts, alloys, and healthcare.

[0003] Metallic germanium has excellent infrared optical and physical properties, and is an ideal window, lens, prism and filter for thermal imagers. It is widely used in night vision devices and thermal imagers for reconnaissance and surveillance, and plays an irreplaceable role in the field of infrared optics. Generally, germanium lenses have two spherical surfaces, one concave and one convex. When processing, such as Figure 1 As shown, a germanium single crystal rod is first cut into small sections (flat germanium sheets), which are then milled to create two concave and convex spherical surfaces. This process produces a large amount of germanium sludge, the recycling of which accounts for 25-30% of the cost of a germanium lens. Furthermore, the processing of a single lens requires a germanium single crystal that far exceeds the thickness of the lens, resulting in low utilization of the germanium single crystal and low production efficiency. Summary of the Invention

[0004] The present invention provides a germanium lens processing device and a processing method, which improve the utilization rate of germanium single crystals, reduce germanium sludge generated during the processing, and reduce production costs.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A germanium lens processing device includes a support frame, a fixing member, a first driving block, a second driving block, a screw rod, a scale wheel, a first motor, a clamp, a second motor, a spherical blade, a third motor and a reducer;

[0007] The support frame is provided with two support platforms, namely the upper support platform and the lower support platform, and the upper support platform is located directly above the lower support platform;

[0008] The fixing member, the first driving block and the second driving block are sequentially arranged in the same direction on the upper support table; the first guide rail is arranged on the upper support table at the bottom of the first driving block, the first guide rail is linear, and the first driving block is slidingly fitted on the first guide rail; the fixing member is connected to the upper support table, the one end of the screw rod is fixedly connected to the center of the scale dial, the other end of the screw rod sequentially passes through the fixing member and the first driving block, the screw rod is connected to the fixing member through the ball bearing, the screw rod is threadedly connected to the first driving block, and the scale dial is rotated to drive the first driving block to slide along the first guide rail; the first motor is installed on the first driving block, and the clamp is installed at the end of the rotating shaft of the first motor; the angle scale value is arranged along the periphery of the scale dial, and the scale pointer is arranged on the fixing member.

[0009] The second motor is installed on the second driving block, the spherical blade is installed at the end of the rotating shaft of the second motor, the spherical blade is coaxially arranged with the rotating shaft of the second motor, and the convex surface of the spherical blade faces outward; the third motor and the speed reducer are connected and are both installed on the lower support table, the rotating shaft of the speed reducer passes through the upper support table and is connected to the second driving block, and the speed reducer can drive the second driving block to move in an arc around the speed reducer shaft as the center.

[0010] The extension line of the speed reducer shaft is perpendicular to the rotating shaft of the second motor, and the extension line of the rotating shaft of the first motor passes through the intersection of the extension line of the speed reducer shaft and the rotating shaft of the second motor.

[0011] The side of the spherical blade away from the second motor is the outer side, and the side adjacent to the second motor is the inner side.

[0012] The angle scale value (0-360°) is arranged on the scale dial, and the scale pointer is arranged on the fixing member, so that the rotation angle of the scale dial can be accurately obtained, and the position of the first motor can be accurately controlled.

[0013] In order to improve the control accuracy, the second guide rail is arranged on the upper support table at the bottom of the second driving block, the second guide rail is arc-shaped, the second driving block is slidingly fitted on the second guide rail and can move in an arc around the speed reducer shaft as the center. In this way, the stability and accuracy of operation can be improved.

[0014] In order to facilitate driving, the second driving block is provided with a pad, the pad is fixedly connected to the upper support table, and the rotating shaft of the speed reducer sequentially passes through the upper support table and the pad and is connected to the second driving block. In this way, the thickness of the second driving block can be reduced, and the driving power can be reduced.

[0015] When the scheme with the pad is adopted, preferably, the second guide rail is arranged on the pad, the second guide rail is arc-shaped, the second driving block is slidingly fitted on the second guide rail and can move in an arc around the speed reducer shaft as the center.

[0016] In order to read the scale, the scale pointer is fixed in the middle of the top of the fixed part. In this way, the angle is observed.

[0017] The third motor is a reversible motor. That is, it can rotate forward and backward, and a commercially available motor that can rotate forward and backward can be directly purchased.

[0018] The second motor shaft and the first motor shaft are arranged opposite to each other, that is, the second motor shaft faces the first motor shaft, but it is not specified that the two shafts need to be coaxial.

[0019] In order to improve the accuracy of cutting, the shaft heights of the second motor shaft and the first motor shaft are equal.

[0020] The shaft of the speed reducer is fixedly connected with the second driving block. The shaft of the speed reducer rotates, and in turn drives the second driving block to move in an arc around the shaft of the speed reducer.

[0021] The spherical blade is a spherical pot cover. The spherical blade is installed on the end of the second motor shaft through a mounting shaft. One end of the mounting shaft is connected with the center of the concave surface of the spherical blade, and the other end is connected with the second motor shaft. The position of the mounting shaft on the second motor shaft is adjustable.

[0022] As one of the specific implementation schemes, one end of the mounting shaft is connected with the center of the concave surface of the spherical blade, and the other end is provided with a connecting ring. The connecting ring is sleeved on the second motor shaft and is fixed by a bolt or a pin shaft penetrating through the connecting ring sleeve and the second motor shaft.

[0023] In order to facilitate use, the device further comprises a receiving box. The receiving box is provided with a buffer liquid or buffer cotton. The receiving box is placed on the upper support table below the clamp. The position of the receiving box is flexible and adjustable. When the device is running, the receiving box is placed directly below the free end of the crystal bar, so that the cut wafer can fall directly into the receiving box. The buffer liquid or buffer cotton in the receiving box reduces the damage of the wafer. In order to minimize the damage, the cut wafer can be taken out from the receiving box in time. The buffer liquid is also water and the like.

[0024] The germanium lens processing device is used for processing, and the method for processing the germanium lens comprises the following steps in sequence:

[0025] 1) A graphite block with a diameter basically the same as that of the crystal bar is adhered to one end of the crystal bar by AB glue, and then the adhered crystal bar and graphite are put into a rounding machine for rounding to ensure that the graphite block and the crystal bar are coaxial;

[0026] 2) One end of the graphite block is placed in a clamp connected with the first motor and clamped;

[0027] 3) the spherical radius of the target lens on both sides is R1 and R2, the spherical radius of the spherical blade is equal to the larger one of R1 and R2, and the effective radius d of the spherical blade is greater than R, wherein R is the radius of the crystal bar;

[0028] 4) adjust the installation position of the spherical blade so that the distance from the center of the spherical concave surface of the spherical blade to the intersection of the shaft center of the speed reducer and the shaft center of the second motor is equal to the larger one of R1 and R2, and fix the spherical blade tightly;

[0029] 5) rotate the scale wheel disc to adjust the position of the crystal bar, so that the initial position of the rotation cutting of the spherical blade is the target cutting position of the crystal bar, that is, the cutting edge of the edge of the spherical blade is aligned with the starting cutting point of the crystal bar; the edge thickness of the first cutting of a crystal bar is 0, which can further reduce the generation of germanium mud and improve the recycling rate of germanium, and the edge thickness of the subsequent cutting is determined according to the thickness of the order until the crystal bar is cut off;

[0030] 6) start the first motor, the second motor, the third motor and the speed reducer to start cutting, the rotation directions of the shafts of the first motor and the second motor are opposite, the speed reducer can drive the spherical blade to make an arc motion pointing to the center of the crystal bar, when the edge of the blade reaches the center of the crystal bar, the third motor and the speed reducer stop, when the wafer is cut off, the first motor and the second motor stop, and the third motor and the speed reducer are reversed to make the spherical blade retreat to the initial position of the rotation cutting;

[0031] 7) repeat steps 5) to 6) to complete the cutting of the whole crystal bar, and the obtained wafer is finely processed to the target size to complete the wafer processing.

[0032] In order to ensure the processing quality, in the above step 3), the spherical radius of the spherical blade is equal to the larger one of R1 and R2 plus 2-3 mm, and in the above step 4), the distance from the center of the spherical concave surface of the spherical blade to the intersection of the shaft center of the speed reducer and the shaft center of the second motor is equal to the larger one of R1 and R2 plus 2-3 mm, which also leaves a certain processing allowance to improve the yield.

[0033] In the above step 3), the effective radius of the spherical blade refers to the distance between the edge of the spherical blade and the installation shaft.

[0034] In step 6), the speed reducer can drive the second driving block to make an arc motion, the second motor is arranged on the second driving block, and the spherical blade is arranged on the second motor, so that the speed reducer drives the spherical blade to make an arc motion in the process of driving the second driving block to make an arc motion, thereby realizing the cutting of the crystal bar in the radial direction.

[0035] In the step 6), the rotating speed of the first motor is 30-50 r / min, the rotating speed of the second motor is 600-1000 r / min, and the angular speed of the spherical blade driven by the speed reducer is 3-5 ° / min.

[0036] The techniques not mentioned in the present application refer to the prior art.

[0037] The germanium lens processing equipment has low cost, simple required components, wide source and easy assembly; realizes the curved surface cutting of the germanium single crystal rod, improves the utilization rate of the germanium single crystal rod; requires less single crystal rod for completing an order of a customer, speeds up the circulation of the order and improves the production efficiency; facilitates the finish machining of the germanium lens, improves the machining efficiency, reduces the generation of germanium oil slurry and reduces the amount of the germanium oil slurry to 20-30% of the original amount. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a schematic diagram of the machining of the existing germanium lens;

[0039] Figure 2 It is an elevation view of the germanium lens processing equipment of the present application;

[0040] Figure 3 It is a plan view of the germanium lens processing equipment of the present application;

[0041] Figure 4 It is Figure 2 It is a left view of the middle scale dial and the fixing member;

[0042] Figure 5 It is a schematic diagram of the machining of the germanium lens of the present application;

[0043] Figure 6 It is a schematic diagram of the target germanium lens;

[0044] Figure 7 It is a schematic diagram of the target lens required in the order in the embodiment;

[0045] In the figure, 1 is a support frame, 101 is an upper support table, 102 is a lower support table, 2 is a fixing member, 201 is a scale pointer, 3 is a first driving block, 4 is a second driving block, 5 is a lead screw, 6 is a scale dial, 601 is a rotating handle, 602 is an angular scale value, 7 is a first motor, 8 is a clamp, 9 is a second motor, 10 is a spherical blade, 11 is a third motor, 12 is a speed reducer, 13 is a crystal rod and 14 is a pad. DETAILED DESCRIPTION

[0046] In order to better understand the present application, the content of the present application is further illustrated below in combination with the embodiments, but the content of the present application is not limited to the following embodiments only.

[0047] Embodiment 1

[0048] As Figures 2-3 shown, a germanium lens processing device, comprising a support frame, a fixed part, a first driving block, a second driving block, a lead screw, a scale dial, a first motor, a clamp, a second motor, a spherical blade, a third motor and a speed reducer;

[0049] The support frame is provided with two layers of support tables, namely an upper support table and a lower support table, and the upper support table is located directly above the lower support table.

[0050] The fixed part, the first driving block and the second driving block are sequentially arranged in the same direction on the upper support table; the first driving block is provided with a first guide rail on the upper support table at the bottom, the first guide rail is linear, and the first driving block is slidingly fitted on the first guide rail; the fixed part is connected to the upper support table, one end of the lead screw is vertically welded at the center of the scale dial, the other end of the lead screw passes through the fixed part and the first driving block in sequence, and the lead screw is connected with the fixed part through a ball bearing (an installation hole is formed on the fixed part, the outer ring of the ball bearing is connected to the inner side of the installation hole on the fixed part, and the inner ring of the ball bearing is connected to the outer side wall of the lead screw, and as common knowledge, the inner ring and the outer ring of the ball bearing can rotate relatively, so that when the scale dial is rotated, the lead screw can be driven to rotate, and in turn drive the first driving block to slide along the first guide rail), the lead screw and the first driving block are threadedly connected, and the first driving block can be driven to slide along the first guide rail by rotating the scale dial; the first motor is installed on the first driving block, and the clamp is installed at the end of the rotating shaft of the first motor; as Figure 4 shown, the diameter of the scale dial is smaller than that of the fixed part, the scale dial is provided with an angle scale value (it should be noted that Figure 4 only the angle scale is shown, and the angle scale needs to be at least accurate to "degrees (°)" during processing) and a rotating handle are arranged along the periphery, and the fixed part is provided with a scale pointer;

[0051] The second motor is installed on the second driving block, the spherical blade is installed at the end of the rotating shaft of the second motor, the spherical blade is coaxially arranged with the rotating shaft of the second motor, and the convex surface of the spherical blade faces outward; the third motor and the speed reducer are connected and installed on the lower support table, the rotating shaft of the speed reducer passes through the upper support table and is connected with the second driving block, and the speed reducer can drive the second driving block to move in an arc with the speed reducer shaft as the center; the extension line of the speed reducer shaft intersects perpendicularly with the rotating shaft of the second motor, and the extension line of the rotating shaft of the first motor passes through the intersection point of the extension line of the speed reducer shaft and the rotating shaft of the second motor.

[0052] The scale dial is provided with an angle scale value (0-360°), and the fixed part is provided with a scale pointer, so that the rotation angle of the scale dial can be accurately obtained, and the position of the first motor can be accurately controlled.

[0053] The parameters of the target lens required by the order are as Figure 7 shown, and the processing process is as follows:

[0054] 1) Select a crystal rod with a diameter of 62 mm, and stick a cylindrical graphite block with a diameter of 62 mm on one end of the crystal rod with AB glue, and then put the glued crystal rod and graphite together into a rounding machine to round to a diameter of 60.4 mm, ensuring that the graphite block and the crystal rod are coaxial;

[0055] 2) Put the rounded crystal rod with the graphite block on one end into the clamp connected to the first motor and clamp it tightly;

[0056] 3) Replace the appropriate spherical blade according to the customer's order requirements, and the spherical radius of the spherical blade is 68 mm, and the effective radius d of the blade is 32 mm;

[0057] 4) Adjust the installation position of the spherical blade so that the distance from the intersection of the spherical surface of the spherical blade to the shaft center of the speed reducer and the shaft center of the second motor is equal to the spherical radius 68 mm, and fix the spherical blade tightly;

[0058] 5) Tool setting: rotate the scale wheel to adjust the position of the crystal rod, so that the initial position of the rotary cutting of the spherical blade is the target cutting position of the crystal rod, as shown in the figure, the edge thickness of the first cutting of a crystal rod is 0, and the edge thickness of the subsequent cutting is determined according to the thickness of the order; Figure 5

[0059] 6) Start the first motor to make the crystal rod rotate at a speed of 40 r / min, and start the second motor to make the spherical blade rotate at a speed of 600 r / min, and the rotation directions of the first motor shaft and the second motor shaft are opposite; Start the third motor and the speed reducer, and make the spherical blade cut towards the center of the crystal rod with the shaft of the speed reducer as the center of rotation at an angular velocity of 3° / min; When the edge of the blade reaches the center of the crystal, stop the third motor and the speed reducer, and when the wafer is cut off, stop the first motor and the second motor, and reverse the third motor and the speed reducer to make the spherical blade retreat to the initial position of rotary cutting;

[0060] 7) Rotate the scale wheel to advance the crystal rod by a distance of 6.5 mm, repeat steps 5)-6), and cycle to complete the cutting of the entire crystal rod; Cycle to complete the cutting of the required amount of crystal rod, and finely process the obtained wafer to the target size as shown in the figure. Figure 7

[0061] The following data is the average data of the inventor for each processing of 300 wafers:

[0062] According to the measurement, the wafer with a center thickness of about 6.5 mm needs to be cut first, and the weight is 96 g, and the target size is finely processed as shown in the figure, and 27 g of germanium mud is produced for processing one lens; A crystal rod with a length of 100 mm can process 15 lenses; Figure 7 ​​​

[0063] The existing method shown in Fig. 1 needs to cut a germanium flat plate with a thickness of about 12.5 mm and a weight of 187 g, mill out the concave-convex surfaces on both sides of the lens, and finely process to the target size shown in Fig. 2, to process a lens, resulting in 116.6 g of germanium mud; one crystal bar with a length of 100 mm can process 8 lenses. Figure 1 Figure 7 The existing method shown in Fig. 1 needs to cut a germanium flat plate with a thickness of about 12.5 mm and a weight of 187 g, mill out the concave-convex surfaces on both sides of the lens, and finely process to the target size shown in Fig. 2, to process a lens, resulting in 116.6 g of germanium mud; one crystal bar with a length of 100 mm can process 8 lenses.

[0064] The existing method shown in Fig. 1 needs to cut a germanium flat plate with a thickness of about 12.5 mm and a weight of 187 g, mill out the concave-convex surfaces on both sides of the lens, and finely process to the target size shown in Fig. 2, to process a lens, resulting in 116.6 g of germanium mud; one crystal bar with a length of 100 mm can process 8 lenses. Figure 1 Compared with the existing method shown in Fig. 1, the single crystal utilization rate is increased by 12.5 / 6.5-1=92.3%, the germanium mud is reduced to 27 / 116.6=23.2% of the original, the net profit of the order is increased from 12% to 25%, and the economic benefit is remarkable; each processing saves 23 minutes.

[0065] Embodiment 2

[0066] On the basis of embodiment 1, the following improvements are further made: in order to improve the control accuracy, the upper layer support table at the bottom of the second driving block is provided with a second guide rail, the second guide rail is in an arc shape, the second driving block is slidingly fitted on the second guide rail and can move in an arc around the shaft of the speed reducer. In this way, the stability and accuracy of operation can be improved.

[0067] Embodiment 3

[0068] On the basis of embodiment 1, the following improvements are further made: in order to facilitate driving, the bottom of the second driving block is provided with a pad, the pad is fixedly connected to the upper layer support table, and the rotating shaft of the speed reducer passes through the upper layer support table and the pad in sequence and is connected to the second driving block. In this way, the thickness of the second driving block can be reduced, and the driving power can be reduced. When the scheme with the pad is adopted, the pad is provided with a second guide rail, the second guide rail is in an arc shape, the second driving block is slidingly fitted on the second guide rail and can move in an arc around the shaft of the speed reducer.

[0069] Embodiment 4

[0070] On the basis of embodiment 2 or 3, the following improvements are further made: in order to facilitate reading, the scale pointer is fixed at the middle position of the top of the fixed part, which facilitates angle observation; the third motor is a forward and reverse motor; the rotating shaft of the second motor and the rotating shaft of the first motor are oppositely arranged; the shaft center heights of the rotating shaft of the second motor and the rotating shaft of the first motor are equal. The rotating shaft of the speed reducer is fixedly connected to the second driving block. The rotating shaft of the speed reducer rotates and in turn drives the second driving block to move in an arc around the shaft of the speed reducer.

[0071] Embodiment 5

[0072] ​On the basis of Embodiment 4, the following improvements are further made: the spherical blade is a spherical pot cover, the spherical blade is installed on the end of the second motor rotating shaft through an installation shaft, the installation shaft is coaxial with the second motor rotating shaft, one end of the installation shaft is connected with the center of the concave surface of the spherical blade, the other end of the installation shaft is connected with the second motor rotating shaft, and the position of the installation shaft on the second motor rotating shaft is adjustable. One end of the installation shaft is connected with the center of the concave surface of the spherical blade, the other end of the installation shaft is provided with a connecting ring, the connecting ring is sleeved on the second motor rotating shaft, and the connecting ring is fixed through bolts or pins which pass through the sleeve and the second motor rotating shaft at the same time.

[0073] Embodiment 6

[0074] On the basis of Embodiment 5, the following improvements are further made: in order to facilitate use, the above device further comprises a receiving box, the receiving box is provided with a buffer solution (water) or buffer cotton, the receiving box is placed on the upper support table below the crystal bar, the position of the receiving box is flexible and adjustable, when the device is running, the receiving box is placed directly below the free end of the crystal bar, so that the cut wafer can fall directly into the receiving box, the setting of the buffer solution or the buffer cotton in the receiving box reduces the damage of the wafer due to collision, in order to minimize the damage, the cut wafer can be taken out from the receiving box in time.

Claims

1. A method for processing a germanium lens, characterized in that: The germanium lens processing equipment comprises a support frame (1), a fixing member (2), a first driving block (3), a second driving block (4), a screw rod (5), a scale wheel (6), a first motor (7), a clamp (8), a second motor (9), a spherical blade (10), a third motor (11) and a reducer (12); The support frame (1) is provided with two support platforms, namely an upper support platform (101) and a lower support platform (102), wherein the upper support platform (101) is located directly above the lower support platform (102); The fixing member (2), the first driving block (3) and the second driving block (4) are sequentially arranged on the upper support platform (101) along the same direction; a first guide rail is provided on the upper support platform (101) at the bottom of the first driving block (3); the first guide rail is linear, and the first driving block (3) is slidably fitted on the first guide rail; the fixing member (2) is connected to the upper support platform (101); one end of the screw rod (5) is fixedly connected to the scale wheel (6), and the other end of the screw rod (5) sequentially passes through the fixing member (2) and the first driving block (3); the screw rod (5) and the fixing member (2) are threadedly fitted, and rotating the scale wheel (6) can drive the first driving block (3) to slide along the first guide rail; the first motor (7) is mounted on the first driving block (3), and the clamp (8) is mounted on the end of the rotating shaft of the first motor (7); the scale wheel (6) is provided with angle scale values ​​(602) arranged along the periphery, and the fixing member (2) is provided with a scale pointer (201); The second motor (9) is mounted on the second driving block (4), and the spherical blade (10) is mounted on the end of the rotating shaft of the second motor (9). The spherical blade (10) and the rotating shaft of the second motor (9) are coaxially arranged, and the convex surface of the spherical blade (10) faces outward. The third motor (11) is connected to the reducer (12) and both are mounted on the lower support platform (102). The rotating shaft of the reducer (12) passes through the upper support platform (101) and is connected to the second driving block (4). The reducer (12) can drive the second driving block (4) to perform arc motion with the reducer shaft as the center. The method for processing a germanium lens comprises the following steps in sequence: 1) Using AB glue, glue a graphite block with the same diameter as the crystal rod (13) to one end of the crystal rod (13), and then put the glued crystal rod (13) and the graphite into a rolling machine for rolling, ensuring that the axes of the graphite block and the crystal rod (13) are consistent; 2) placing one end of the graphite sticky block into a fixture (8) connected to the first motor (7) and clamping it; 3) The spherical radii of the two side surfaces of the target lens are R1 and R2 respectively, the spherical radius of the spherical blade (10) is equal to the larger one of R1 and R2, and the effective radius d of the spherical blade (10) is greater than R, where R is the radius of the crystal rod (13); 4) adjusting the installation position of the spherical blade (10) so that the distance between the center of the concave surface of the spherical blade (10) and the intersection of the axis of the reducer (12) and the axis of the second motor (9) is equal to the larger one of R1 and R2; 5) rotating the graduated wheel (6) to adjust the position of the crystal rod (13) so that the initial position of the spherical blade (10) for rotating cutting is the target cutting position of the crystal rod (13); 6) starting the first motor (7), the second motor (9), the third motor (11) and the reducer (12) to start cutting, the rotation direction of the first motor (7) and the rotation direction of the second motor (9) are opposite, the reducer (12) drives the spherical blade (10) to make an arc motion pointing to the center of the crystal rod (13), when the edge of the blade reaches the center of the crystal rod (13), the third motor (11) and the reducer (12) stop, when the wafer is cut off, stop the first motor (7) and the second motor (9), and rotate the third motor (11) and the reducer (12) in the opposite direction, so that the spherical blade (10) returns to the initial position of the rotation cutting; 7) Repeat steps 5)-6) to complete the cutting of the entire crystal rod (13), and finely process the obtained wafer to the target size to complete the wafer processing.

2. The method for processing a germanium lens according to claim 1, wherein: A second guide rail is provided on the upper support platform (101) at the bottom of the second driving block (4). The second guide rail is arc-shaped. The second driving block (4) is slidably fitted on the second guide rail and can move in an arc along the second guide rail with the reducer shaft as the center.

3. The method for processing a germanium lens according to claim 1, wherein: A cushion block (14) is provided at the bottom of the second driving block (4), and the cushion block (14) is fixedly connected to the upper support platform (101). The rotating shaft of the reducer (12) passes through the upper support platform (101) and the cushion block (14) in sequence and is connected to the second driving block (4).

4. The method for processing a germanium lens according to claim 3, wherein: The cushion block (14) is provided with a second guide rail, which is in an arc shape. The second driving block (4) is slidably fitted on the second guide rail and can move in an arc along the second guide rail with the reducer shaft as the center.

5. The method for processing a germanium lens according to any one of claims 1 to 4, characterized in that: It also includes a material receiving box, in which a buffer or buffer cotton is provided. The material receiving box is placed on the upper support platform (101) below the clamp (8); and the scale pointer is fixed at the middle position of the top of the fixing member (2).

6. The method for processing a germanium lens according to any one of claims 1 to 4, characterized in that: The third motor (11) is a forward and reverse rotating motor; the rotating shaft of the second motor (9) and the rotating shaft of the first motor (7) are arranged opposite to each other, and the axis heights of the rotating shaft of the second motor (9) and the rotating shaft of the first motor (7) are equal; the rotating shaft of the reducer (12) is fixedly connected to the second driving block (4).

7. The method for processing a germanium lens according to any one of claims 1 to 4, characterized in that: The spherical blade (10) is shaped like a pot cover and is mounted on the end of the rotating shaft of the second motor (9) via a mounting shaft. One end of the mounting shaft is connected to the concave center of the spherical blade (10) and the other end is connected to the rotating shaft of the second motor (9). The position of the mounting shaft on the rotating shaft of the second motor (9) is adjustable.

8. The method for processing a germanium lens according to claim 7, wherein: One end of the mounting shaft is connected to the concave center of the spherical blade (10), and the other end is provided with a connecting ring, which is sleeved on the rotating shaft of the second motor (9) and fixed by a bolt or a pin that passes through the connecting ring sleeve and the rotating shaft of the second motor (9) at the same time.

9. The method for processing a germanium lens according to any one of claims 1 to 4, characterized in that: In step 6), the rotation speed of the first motor (7) is 30-50 r / min, the rotation speed of the second motor (9) is 600-1000 r / min, and the angular velocity of the spherical blade (10) driven by the reducer (12) to move in an arc is 3-5° / min.

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