CN108044130A - A kind of metal multiaspect scan prism processing method of achievable on-line checking - Google Patents

Abstract

The invention discloses a metal multi-faceted scanning prism processing method capable of on-line detection, which solves the problem that multiple clamping and positioning errors affect the processing accuracy of the scanning surface angle; the rotation angle of the rotating shaft is precisely controlled by the self-collimation positioning optical path and the standard block, At the same time, adjust the self-collimation detection optical path based on the first scanning surface of the processed metal multi-faceted scanning prism, and rotate the shaft. The optical path and the nth scanning surface of the first scanning surface also realize self-collimation; the use of this technical solution can complete the online detection and processing of metal multi-faceted scanning prisms on a two-axis machine tool without relying on high-precision CNC rotating shafts, greatly Improve processing efficiency, processing accuracy and processing consistency.

Description

A metal multi-faceted scanning prism processing method capable of on-line detection

technical field

The invention belongs to the technical field of optical processing, and in particular relates to a processing method of a multi-faceted scanning prism.

Background technique

Multi-faceted scanning prisms have multiple reflective surfaces and are the core optical devices in laser equipment such as scanners, copiers, and code scanners. When in use, it is usually installed on the rotating shaft of the motor. Through the high-speed rotation of the multi-faceted scanning prism, a large-scale, ultra-high-speed, high-precision and high-repeatability laser beam scanning can be realized. The angle accuracy, surface quality and other factors will directly affect the scanning. Accuracy and effect, so the angle processing accuracy of each reflective surface is very high.

At present, the processing of multi-faceted scanning prisms in China is mainly realized by CNC lathes with rotating shafts, the number of which can be processed at one time is limited, and the angular accuracy between each surface is guaranteed by the accuracy of CNC rotating shafts. When processing a multi-faceted scanning prism on a CNC lathe, in order to ensure the angular accuracy between each scanning face, it is necessary to complete all side processing in one clamping. When detecting the angles of each scanning surface, if the offline detection is used, if the angle of a certain scanning surface is out of tolerance, it needs to be re-clamped, and the scanning prism will be processed again. When re-clamping, a new positioning error will inevitably be introduced, which is low in processing efficiency. The detection efficiency is also low; in addition, the product consistency is poor during batch processing, which seriously affects the stability of the assembled equipment.

Contents of the invention

The purpose of the present invention is to solve the problem that the positioning error introduced by multiple clamping affects the angular accuracy of each scanning surface.

A metal multi-faceted scanning prism processing method that can realize online detection, the specific technical scheme is as follows:

1) processing standard block step: process a polyhedral prism whose precision is better than the design parameters of the metal multi-faceted scanning prism as a standard block, the number of scanning faces of the metal multi-faceted scanning prism is recorded as N, and the number of sides on the standard block is also for N;

2) installing and fixing the standard block on the rotating shaft of the electric control turntable, wherein the normal direction of any side on the standard block is perpendicular to the rotating shaft of the electric control turntable;

3) The metal multi-faceted scanning prism blank to be processed is also clamped on the rotating shaft of the electric control turntable, wherein the normal direction of the cross-section of the metal multi-face scanning prism blank is parallel to the rotating shaft of the electric control turntable;

4) Build the self-collimation positioning optical path on the machine tool, install the electric control turntable on the machine tool workbench, turn the electric control turntable, align the first side of the standard block with the self-collimation positioning optical path, and use The locking mechanism fixes the rotating shaft of the electric control turntable; turning the first scanning surface on the metal multi-faceted scanning prism blank;

5) Build the self-collimation detection optical path on the machine tool, when the first side of the standard block is aligned with the self-collimation positioning optical path, take the first scanning surface of the metal multi-faceted scanning prism as a reference, adjust the self-collimation detection optical path so that The reflected light reflected by the first scanning surface coincides with the incident light;

6) Turn the electric control turntable, align the nth side of the standard block with the self-collimation positioning optical path, and turn the nth scanning surface on the metal multi-faceted scanning prism blank; the nth side of the standard block When aligning the self-collimation positioning optical path, if the incident light of the self-collimation detection optical path does not coincide with the reflected light reflected by the nth scanning surface of the metal multi-faceted scanning prism, the reflected light of the nth scanning surface and the The incident light angle error is fed back to the machine tool for error compensation processing, and the nth scanning surface is turned again; if the incident light of the autocollimation detection optical path coincides with the reflected light reflected by the nth scanning surface, the first scanning surface and the nth scanning surface The angle of the n scanning plane meets the requirements; where n increases from 2 to N in turn. The technical effect brought about is: after the nth scanning surface is processed, it can be directly judged through the autocollimation detection optical path whether the angle error between the processing surface and the first scanning surface meets the requirements. If it does not meet the requirements, there is no need to re-clamp , directly take the angular deviation as the error compensation file of the machine tool and turn the nth scanning surface again, effectively avoiding the influence of the re-clamping positioning error on the angular accuracy.

In order to reduce the amount of cutting, the metal multi-faceted scanning prism blank can be made into a metal polyhedron with an angle error of less than 2 degrees, and then directly turned into an optical surface by diamond flying knife turning technology according to the above technical scheme.

The above technical solution can also be turned on a longer metal multi-faceted scanning prism blank, and after all sides are processed, multiple metal multi-faceted scanning prisms can be directly obtained through cutting process.

In the above technical solution: the standard block is a glass polygonal prism whose precision is better than the design parameters of the metal polygonal scanning prism.

In the above technical solution: the glass polygonal prism can be processed by conventional cold processing methods, and the angle error and tower difference between the surfaces are strictly controlled when processing the standard block.

In the above technical solution: the standard block is provided with a through hole, and the through hole on the standard block is assembled and fixed coaxially with the rotating shaft of the electric control turntable.

In the above technical solution: the metal multi-faceted scanning prism blank to be processed is also provided with a through hole, which penetrates into the rotating shaft of the electric control turntable.

In the above technical solution: the self-collimation positioning optical path is an autocollimation collimator.

A preferred solution: the self-collimation positioning optical path is composed of a parallel light laser, a beam splitter, a plane mirror, and an image screen, wherein the parallel light emitted by the parallel light laser is incident on the beam splitter, and the light reflected by the beam splitter is taken as a reference light The plane mirror vertically placed in the optical path is reflected and incident to the image screen, and the light transmitted by the beam splitter is incident to any side of the standard block as detection light; the detection light is reflected by the side to the image when the electric control turntable is rotated. screen, forming interference fringes on the image screen. The optical path is actually a Michelson interference optical path, and the rotation angle of the electric control turntable can be controlled more precisely through interference fringes.

It is also possible to replace the image screen with a CCD, image the interference fringes of the reference light and the detection light in the CCD, and monitor the changes of the interference fringes in real time during the entire processing process. In this way, it is more convenient to observe whether the rotating shaft controlling the electric control turntable rotates during the machining process. It is also possible to feed back the real-time change information of the interference fringes back to the machine tool for real-time error compensation when the machine tool is used for turning processing. This kind of processing belongs to the closed-loop processing technology, which can be converted into the attitude change of the rotating shaft of the electric control turntable through the change of interference fringe, and the real-time change information can be fed back to the processing machine tool, which can further improve the processing accuracy.

Optimal technical solution: the self-collimation detection optical path is composed of a parallel light laser and a scale perpendicular to the parallel light emitted by the parallel light laser. When the first side of the standard block is aligned with the self-collimation positioning light path, Based on the first scanning surface of the metal multi-faceted scanning prism, adjust the planar laser so that the reflected light reflected by the first scanning surface coincides with the incident light, and record the reading of the reflected light on the scale. The position of the reading is self-calibration Directly detect the reference position of the optical path; in step 6), rotate the electric control turntable, align the nth side of the standard block with the self-collimation positioning optical path, and turn the nth side on the metal multi-faceted scanning prism mirror blank Scanning surface; now record the nth position of the reflected light of the nth scanning surface on the scale, and the nth position of the reflected light of the nth scanning surface on the scale coincides with the reference position described in step 5), then the metal The angle between the first scanning surface and the nth scanning surface of the multi-faceted scanning prism is equal to the angle between the first side and the nth side of the standard block. The resulting effect is that it is possible to conveniently judge whether the processed scanning surface angle meets the requirements through the position of the reflected light spot on the scale.

In the above-mentioned technical scheme, when the reflected light of the nth scanning surface of the metal polygonal scanning prism does not coincide with the reference position described in step 5) on the scale, the distance between the nth position and the reference position is measured. Deviation h, the distance L between the measuring scale and the nth scanning surface, the angle between the reflected light and the incident light of the nth scanning surface β=arcsin(h/L), the nth metal polygonal scanning prism The angular deviation between the scanning plane and the first scanning plane is β/2. This scheme essentially uses the amplification principle of the optical lever to amplify the tiny angle error and convert the angle error into the deviation on the scale. The angle deviation can be quantitatively measured online, and the angle error can be fed back to the CNC machine tool. , Compensation processing further improves the angular accuracy of the scanning surface.

In order to adapt to batch processing, a more optimal solution is: in the above technical solution, the rotating shaft of the electric control turntable described in step 2) is connected to several driven rotating shafts through a linkage mechanism, and each driven rotating shaft can be clamped At least one metal multi-sided scanning prism blank, when the rotating shaft of the electric control turntable rotates, the said driven rotating shaft also rotates at the same angle; in said step 3), multiple metal multi-sided scanning prism blanks to be processed are clamped at the same time On the driven rotating shaft; the step 4) builds the self-collimation positioning optical path on the machine tool, and installs the electric control turntable on the machine tool workbench, rotates the electric control turntable, and the first part of the standard block Align the two sides with the self-collimating and positioning optical path, fix the rotating shaft of the electric control turntable with a locking mechanism; turn the first scanning surface on the clamped metal multi-faceted scanning prism blank to be processed. In this way, multiple metal multi-faceted scanning prism blanks to be processed can be installed on each rotating shaft, and multiple driven rotating shafts can be connected through a linkage device, so that batch processing can be realized, and the accuracy of the same batch of products can be guaranteed. The stability of the assembled product is greatly improved.

Description of drawings

Fig. 1 schematic diagram of metal multi-faceted scanning prism processing;

Figure 2 is a schematic diagram of multi-axis batch processing of metal multi-faceted scanning prisms;

Fig. 3 is a schematic diagram of an autocollimation positioning optical path;

Figure 4 is a schematic diagram of an autocollimation detection optical path;

Among them: 1-electric control turntable, 2-standard block, 3-metal multi-faceted scanning prism blank, 4-rotary shaft of electric control turntable, 5-self-collimation positioning optical path, 6-electric control turntable bracket, 7-locking mechanism , 8-linkage mechanism, 9-driven shaft, 10-parallel laser, 11-beam splitter, 12-reference light, 13-detection light, 14-plane mirror, 15-image screen, 16-autocollimation detection Optical path, 17-scale, 18-incident light of nth scanning surface, 19-reflected light of nth scanning surface, 19, 20-reference position of autocollimation detection optical path, 21-reflected light on scale nth Position, 22-the theoretical position of the nth scanning surface; h-the deviation between the nth position and the reference position, L-the distance between the scale and the nth scanning surface, β-the nth scanning surface The angle between the reflected light and the incident light.

Detailed ways

In order to illustrate the invention more clearly, the following will be further described in conjunction with the accompanying drawings and embodiments

Embodiment one:

A metal multi-faceted scanning prism processing method that can realize on-line detection, as shown in accompanying drawing 1, the specific technical scheme is as follows:

1) processing standard block step: process a polyhedral prism whose precision is better than the design parameters of the metal multi-faceted scanning prism as the standard block 2, the number of scanning faces of the metal multi-faceted scanning prism is recorded as N, the number of sides on the standard block also N;

2) Install and fix the standard block on the rotating shaft 4 of the electric control turntable 1, wherein the normal direction of any side on the standard block is perpendicular to the rotating shaft of the electric control turntable;

3) The metal multi-faceted scanning prism blank 3 to be processed is also clamped on the rotating shaft of the electric control turntable, wherein the normal direction of the cross-section of the metal multi-face scanning prism blank is parallel to the rotating shaft of the electric control turntable;

4) Build the self-collimating positioning optical path 5 on the machine tool, and install the electric control turntable on the machine tool workbench, rotate the electric control turntable, align the first side of the standard block with the self-collimating positioning optical path, Using a locking mechanism to fix the rotating shaft of the electric control turntable; turning the first scanning surface on the metal multi-faceted scanning prism blank;

5) Build the self-collimation detection optical path on the machine tool, when the first side of the standard block is aligned with the self-collimation positioning optical path, take the first scanning surface of the metal multi-faceted scanning prism as a reference, adjust the self-collimation detection optical path so that The reflected light reflected by the first scanning surface coincides with the incident light;

6) Turn the electric control turntable, align the nth side of the standard block with the self-collimation positioning optical path, and turn the nth scanning surface on the metal multi-faceted scanning prism blank; the nth side of the standard block When aligning the self-collimation positioning optical path, if the incident light of the self-collimation detection optical path does not coincide with the reflected light reflected by the nth scanning surface of the metal multi-faceted scanning prism, the reflected light of the nth scanning surface and the The incident light angle error is fed back to the machine tool for error compensation processing, and the nth scanning surface is turned again; if the incident light of the autocollimation detection optical path coincides with the reflected light reflected by the nth scanning surface, the first scanning surface and the nth scanning surface The angle of the n scanning plane meets the requirements; where n increases from 2 to N in turn.

Embodiment two:

A kind of metal multi-faceted scanning prism processing method that can realize on-line detection shown in accompanying drawing 2, concrete technical scheme is as follows:

1) Process standard block step: process a polygonal prism whose precision is better than the design parameters of the metal polygonal scanning prism as standard block 2;

2) Install and fix the standard block on the rotating shaft 4 of the electric control turntable 1, wherein the normal direction of the cross section of the standard block is parallel to the rotating shaft of the electric control turntable; the rotating shaft 2 of the electric control turntable 1 communicates with several driven The rotating shaft 9 is connected, and at least one metal multi-faceted scanning prism mirror blank 3 can be clamped on each driven rotating shaft. When the rotating shaft of the electric control turntable rotates, the driven rotating shaft also rotates at the same angle;

3) Clamping a plurality of metal multi-faceted scanning prism blanks to be processed on the driven shaft; wherein the normal direction of the cross-section of the metal multi-faceted scanning prism blanks is parallel to the rotating shaft of the electric control turntable;

4) Build the self-collimation positioning optical path 5 on the electric control turntable bracket 6, install the electric control turntable on the machine tool table, rotate the electric control turntable, and align any side of the standard block with the self-collimation positioning In the optical path, the rotating shaft of the electric control turntable and all driven rotating shafts are fixed by the locking mechanism 7; the first scanning surface is turned on the metal multi-faceted scanning prism mirror blank fixed on the rotating shaft and driven rotating shaft of the electric control turntable .

5) Build an autocollimation detection optical path on the machine tool

Taking the first scanning surface as a reference, adjusting the self-collimation detection optical path so that the reflected light reflected by the first scanning surface coincides with the incident light;

6) Turn the electric control turntable in turn, align the nth side of the standard block with the self-collimation positioning optical path, and turn the nth scanning surface on the metal multi-faceted scanning prism blank; the self-collimation detection When the incident light of the optical path is reflected by the nth scanning surface and the reflected light does not coincide with the incident light, the angle error between the reflected light and the incident light of the nth scanning surface is fed back to the machine tool for error compensation, and the nth scanning surface is again Turning; when the incident light of the self-collimation detection optical path is coincident with the incident light reflected by the nth scanning surface, the angle between the first scanning surface and the nth scanning surface meets the requirements; where 2≤n≤N.

Embodiment three:

On the basis of the technical solution of Embodiment 1, the described self-collimating positioning optical path 5 is composed of a parallel light laser 10, a beam splitter 11, a plane reflector 14, and an image screen 15 as shown in Figure 3, wherein the parallel light emitted by the parallel light laser The light is incident on the beam splitter, and the light reflected by the beam splitter is reflected by the plane reflector vertically placed in the optical path as the reference light 12 and then incident on the image screen, and the light transmitted by the beam splitter is incident on any one of the standard blocks as the detection light 13 Side: when the electric control turntable is rotated, the detection light is reflected to the image screen 15 by the side, and interference fringes are formed on the image screen. The optical path is actually a Michelson interference optical path, and the rotation angle of the electric control turntable can be controlled more precisely through interference fringes.

Embodiment four:

On the basis of the technical solution of Embodiment 1, as shown in Figure 4, the self-collimation detection optical path 16 is composed of a parallel light laser and a scale 17 perpendicular to the parallel light emitted by the parallel light laser. The first standard block When the side is aligned with the self-collimation positioning optical path, with the first scanning surface of the metal polygonal scanning prism as a reference, adjust the planar laser so that the reflected light reflected by the first scanning surface coincides with the incident light, and record the reflected light on the scale The reading on the reading, the position at the reading is the reference position 20 of the autocollimation detection optical path;

In step 6), turn the electric control turntable, align the nth side of the standard block with the self-collimation positioning optical path, and turn the nth scanning surface on the metal multi-faceted scanning prism blank; record the nth side at this time The reflected light of n scanning surfaces is on the nth position 21 on the scale, and the nth position on the scale of the reflected light of the n scanning surfaces coincides with the reference position described in step 5), then the first metal polygonal scanning prism The angle between the scanning surface and the nth scanning surface is equal to the angle between the first side and the nth side of the standard block.

If the nth scanning surface obtained by processing does not coincide with the theoretical position 22 of the nth scanning surface, the reflected light 19 of the nth scanning surface of the metal polygonal scanning prism is on the nth position on the scale and step 5) in The reference position does not coincide, measure the deviation h between the nth position and the reference position, measure the distance L between the scale and the nth scanning surface, and measure the distance L between the reflected light 19 and the incident light 18 of the nth scanning surface. The angle between β=arcsin(h/L), the angle deviation between the nth scanning surface and the first scanning surface of the metal polygonal scanning prism is β/2.

The principle of the above technical solution is to precisely control the rotation angle of the rotating shaft through the self-collimation positioning optical path and the standard block. Since the metal multi-faceted scanning prism blank and the standard block are clamped on the same rotating shaft, at the same time, the processed metal multi-faceted The first scanning surface of the scanning prism is used as a reference to adjust the self-collimation detection optical path. When the rotating shaft is rotated, as long as the self-collimation positioning optical path and the nth side of the standard block realize self-collimation, the distance between the self-collimation detection optical path and the first scanning surface The n-th scanning surface should also achieve self-collimation. At this time, it can be explained that the angular accuracy of each side of the standard block is accurately copied on the metal multi-faceted scanning prism. The use of this technical solution does not depend on the high-precision CNC rotating shaft, and the metal multi-faceted scanning prism can be processed on a two-axis machine tool, which solves the problem of positioning errors introduced by multiple clamping in the prior art that affect the angular accuracy of each scanning surface. problems, greatly improving processing efficiency, processing accuracy and processing consistency.

This technical solution is not only applicable to multi-faceted scanning prisms, but also applicable to multi-faceted special-shaped prisms. For example, the sides of the prisms are spherical or aspherical. The optical axis angle of the standard block is the same as that of the multi-faceted special-shaped prism, and the optical axis angle of the standard block is copied to the multi-faceted special-shaped prism through the technical solution.

Parts not described in detail in this technical solution belong to the well-known technology of those skilled in the art.

Claims (10)

1. a kind of metal multiaspect scan prism processing method of achievable on-line checking, comprises the following steps：

1) processing criterion block step：One piece of precision of processing is better than the multifaceted prism conduct of the design parameter of metal multiaspect scan prism The scanning plane number of the metal multiaspect scan prism is denoted as N by calibrated bolck, and the side number on calibrated bolck is also N；

2) calibrated bolck is fixed in the shaft of automatically controlled turntable, wherein on the calibrated bolck arbitrary side normal side To vertical with the shaft of automatically controlled turntable；

3) by metal multiaspect scan prism mirror embryo to be processed also clamping in the shaft of the automatically controlled turntable, wherein metal multiaspect Scan prism mirror embryo cross section normal direction is parallel with the shaft of automatically controlled turntable；

4) auto-collimation positioning light path is built on lathe, and automatically controlled turntable is mounted on platen, is rotated described automatically controlled By first side alignment auto-collimation positioning light path of the calibrated bolck, the automatically controlled turntable is fixed with lockable mechanism for turntable Shaft；It gets on the bus in the metal multiaspect scan prism mirror embryo and cuts out the first scanning plane；

5) auto-collimation light path is built on lathe, when first side of calibrated bolck is directed at the auto-collimation positioning light path, On the basis of the first scanning plane of metal multiaspect scan prism, adjustment auto-collimation light path makes by the anti-of the first scanning plane reflection It penetrates light and incident light overlaps；

6) the automatically controlled turntable is rotated, n-th of side of calibrated bolck is aligned the auto-collimation positions light path, is swept in metal multiaspect It retouches prism mirror embryo and gets on the bus and cut out n-th of scanning plane；When n-th of side of calibrated bolck is directed at the auto-collimation positioning light path, if institute It is misaligned to state incident light and the reflected light reflected by n-th of the surface sweeping of metal multiaspect scan prism of auto-collimation light path, by n-th The reflected light and incident light angle error of a scanning plane feed back to lathe and carry out error compensation processing, and n-th is scanned again Facing；If the incident light of auto-collimation light path is overlapped with the reflected light reflected by n-th of surface sweeping, the first scanning plane and n-th The angle of scanning plane meets the requirements；Wherein n is successively increased from 2 to N.

2. the metal multiaspect scan prism processing method of achievable on-line checking according to claim 1, it is characterised in that： The calibrated bolck is glass multifaceted prism of the precision better than the design parameter of metal multiaspect scan prism.

3. the metal multiaspect scan prism processing method of achievable on-line checking according to claim 2, it is characterised in that： The glass multifaceted prism is processed using conventional Cold-forming process.

4. the metal multiaspect scan prism processing method of achievable on-line checking according to claim 1, it is characterised in that： Through hole is set on calibrated bolck, and the mode coaxial with the shaft of automatically controlled turntable of the through hole on the calibrated bolck assembles fixation.

5. the metal multiaspect scan prism processing method of achievable on-line checking according to claim 4, it is characterised in that： Through hole is also provided on the metal multiaspect scan prism mirror base to be processed, and penetrates the shaft of automatically controlled turntable.

6. the metal multiaspect scan prism processing method of the achievable on-line checking according to one of Claims 1 to 5, special Sign is：The auto-collimation positioning light path is auto-collimation collimator.

7. the metal multiaspect scan prism processing method of the achievable on-line checking according to one of Claims 1 to 5, special Sign is：The parallel light laser of described auto-collimation positioning optical routing, beam expanding lens, plane mirror, are formed as screen spectroscope, The directional light that wherein parallel light laser projects is incident to spectroscope after expanding, and the light of dichroic mirror is used as with reference to light quilt It is incident to after being disposed vertically the reflection of the plane mirror in light path as screen, the light of spectroscope transmission is incident to institute as detection light State any one side of calibrated bolck；The automatically controlled turntable is rotated, detection light, to as shielding, is formed by the offside reflection on as screen Interference fringe.

8. the metal multiaspect scan prism processing method of the achievable on-line checking according to one of claim 1-5, special Sign is：

Auto-collimation light path described in step 5) is by parallel light laser, the directional light sent with the parallel light laser Vertical scale composition, when first side of calibrated bolck is directed at the auto-collimation positioning light path, is scanned with the metal multiaspect On the basis of first scanning plane of prism, adjustment zero diopter laser makes to be overlapped by the reflected light of the first scanning plane reflection and incident light, Record reading of the reflected light on scale, the position at the reading is the reference position of auto-collimation light path；

In step 6), the automatically controlled turntable is rotated, n-th of side of calibrated bolck is aligned the auto-collimation positions light path, in gold Category multiaspect scan prism mirror embryo, which is got on the bus, cuts out n-th of scanning plane；Of the reflected light of n-th of scanning plane on scale is recorded at this time N positions, the n-th position of the reflected light of n-th of scanning plane on scale are overlapped with reference position described in step 5), then metal is more First scanning plane of Surface scan prism and the angle of the n-th scanning plane are equal to the angle of first side and n-th of side of calibrated bolck Degree.

9. the metal multiaspect scan prism processing method of achievable on-line checking according to claim 8, it is characterised in that： N-th position of the reflected light of n-th of scanning plane of metal multiaspect scan prism on scale and reference position described in step 5) When misaligned, its bias h between reference position of the n-th position is measured, the distance between surveyors' staff and n-th scanning plane L, angle beta=arcsin (h/L) between the reflected light and incident light of n-th scanning plane, n-th of metal multiaspect scan prism Angular deviation between scanning plane and the first scanning plane is β/2.

10. the metal multiaspect scan prism processing method of the achievable on-line checking according to one of Claims 1 to 5, It is characterized in that：

The shaft of automatically controlled turntable described in the step 2) is connected by linkage mechanism with several driven spindles, each from On turn axis all can at least one metal multiaspect scan prism mirror embryo of clamping, when automatically controlled turntable shaft rotation when, it is described from Turn axis also rotates equal angular；

Simultaneously by multiple metal multiaspect scan prism mirror embryo clampings to be processed on the driven spindle in the step 3)；

The step 4) builds auto-collimation positioning light path on lathe, and automatically controlled turntable is mounted on platen, rotates By first side alignment auto-collimation positioning light path of the calibrated bolck, the electricity is fixed with lockable mechanism for the automatically controlled turntable Control the shaft of turntable；It gets on the bus in the metal multiaspect scan prism mirror embryo to be processed of institute's clamping and cuts out the first scanning plane.