CN106969710B - Stable light splitter convenient to detect - Google Patents
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- CN106969710B CN106969710B CN201710386861.1A CN201710386861A CN106969710B CN 106969710 B CN106969710 B CN 106969710B CN 201710386861 A CN201710386861 A CN 201710386861A CN 106969710 B CN106969710 B CN 106969710B
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Abstract
The invention relates to a stable light splitter convenient to detect, which comprises a motor, a grating support, a grating fixed on the grating support, a motor controller for controlling the motor, a return-to-zero piece fixed at the top end of the grating support and positioned at the upper part of the grating, an optical coupler arranged above the return-to-zero piece, and two plane reflectors and concave reflectors which are all arranged on a bottom plate; the bottom plate is respectively provided with an incident slit and an emergent slit; the grating support is provided with a positioning groove, clamping seats and positioning holes are formed in the middle part and four corners of the positioning groove, an elastic clamping ring is arranged in the positioning holes, a positioning table is arranged on the side face of the grating, clamping columns and positioning columns are respectively arranged in the middle part and four corners of the positioning table, and annular grooves are formed in the circumferences of the positioning columns; a cavity is reserved between the positioning table and the annular groove, and the cavity is filled with an adhesive. The light splitting device also comprises a grating detection device arranged on the same side of the incident slit on the bottom plate. The invention improves the stability and reliability of the grating and can realize automatic grating detection.
Description
Technical Field
The invention relates to a light splitting device, belongs to the field of optical equipment, and in particular relates to a stable light splitter convenient to detect.
Background
The biochemical analyzer is one of the most frequently used, the most widely detected and representative devices in medical examination, and has important roles in hospitals at all levels with the advantages of rapidness, accuracy, portability and the like. When the biochemical analyzer detects, a substance with specific absorbance is generated after a reagent reacts with serum or blood, then a light splitting device outputs monochromatic light with single wavelength, the product after the reaction is irradiated by the monochromatic light, and whether the detected serum or blood sample exceeds a certain medical project or not is judged by analyzing the absorbance or the absorbance change by an instrument, so that whether a living body is healthy or not is determined, and therefore, the biochemical analyzer is applied to the light splitting device when the biochemical analyzer performs biochemical analysis.
In the patent with the application number of 'CN 200920078935.6' and the name of 'a grating type light splitting device directly driven by a stepping motor', the grating type light splitting device directly driven by the stepping motor is disclosed, so that the wavelength setting time can be shortened, mechanical contact is not caused except for a moving part outside the motor, friction is not caused, and the accuracy of monochromatic light output and the reliability of a detection result can be ensured. The patent mainly solves the technical problem of inaccurate monochromatic light output, and improves the stability and reliability of the whole device, however, in the patent, the grating is adhered to the side surface of the grating bracket through adhesive, and manual adhesion is basically adopted, so that the positioning of the grating is inaccurate in the installation process, and the grating is deviated in the subsequent use process to influence the accuracy; secondly, when the grating is extruded and pressed during artificial bonding, the grating is inclined due to the problem of uneven manpower, so that uneven light splitting and incomplete light splitting of the grating occur during subsequent light splitting; finally, as the bonding glue is adopted for bonding, when the device is used at too high temperature, the bonding glue is softened, so that the grating can deviate from the bracket to incline when rotating, the softened glue can displace downwards, the solidified grating cannot be kept vertical again, the grating incline is more and more obvious and can be caused to directly fall off after long time, and the grating cannot be used stably for a long time.
Meanwhile, the grating support is fixed on the motor rotating shaft through the screw, and the screw connection part of the grating support is loosened after long-term rotation, so that the grating position is inclined or shifted, and the intensity deviation of the finally output monochromatic light is caused, therefore, a light splitting device which can automatically detect whether the grating meets the output requirement and has a more stable structure needs to be designed.
Disclosure of Invention
Based on the technical problems, the invention provides the stable optical splitter convenient to detect, so that the technical problems that errors are easily caused in the installation of the grating of the traditional optical splitter, the accuracy of the traditional grating is unstable after the installation, and the self-detection cannot be realized are solved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the stable light splitter comprises a motor, a grating support, a grating fixed on the grating support, a motor controller for controlling the motor, a return piece fixed on the top end of the grating support and positioned on the upper part of the grating, an optical coupler arranged above the return piece, and two plane reflectors and concave reflectors which are all arranged on a bottom plate, wherein the bottom plate is fixedly connected with the end face of the motor, the grating support is fixed on a rotating shaft of the motor, and the motor and the optical coupler are also connected with the motor controller; the two sides of the bottom plate, which are positioned on the grating, are also respectively provided with an incident slit and an emergent slit;
the side surface of the grating support, which is fixed with the grating, is provided with a positioning groove, the middle part and four corners of the positioning groove are respectively provided with a clamping seat and a positioning hole, an elastic snap ring is arranged in the positioning hole, the side surface of the grating is provided with a positioning table matched with the positioning groove, the middle part and four corners of the positioning table are respectively provided with a clamping column matched with the clamping seat and a positioning column matched with the positioning hole, and the circumference of the positioning column is provided with an annular groove matched with the positioning table;
the grating is matched with the positioning groove through the positioning table, the clamping seat is matched with the clamping column, and the positioning hole is matched with the positioning column to be positioned on the side surface of the grating bracket; after the positioning table is matched with the annular groove, a cavity is reserved between the positioning table and the annular groove, and the cavity is filled with an adhesive;
the light splitting device further comprises a grating detection device arranged on the same side of the incident slit on the bottom plate, the grating detection device comprises a connecting ring, two monochromatic light source components with different light source intensities and a rotating rod are circumferentially connected to the connecting ring, the two monochromatic light source components are arranged on the same side of the connecting ring at intervals, the two monochromatic light source components can rotate to the inlet end of the incident slit and are coaxial with the incident slit, the end part of the rotating rod is connected with an armature, and electromagnets are arranged on the two sides of the side surface of the bottom plate, which are positioned on the armature; the connecting ring is connected with a rotating shaft, and the rotating shaft is rotatably connected with the bottom plate; a torsion spring is sleeved outside the rotating shaft, and two ends of the torsion spring are fixedly connected with the bottom plate and the connecting ring respectively;
the two monochromatic light source assemblies and the two electromagnets are connected with an electrifying control switch.
Preferably, the upper end of the grating support is also vertically provided with a filling through hole communicated with the cavity.
Preferably, the bottom plate is provided with a through hole, the lower end part of the grating support is positioned in the through hole and connected with a rotating shaft of the motor, and a ball bearing is further arranged on the circumference of the part of the through hole, positioned in the through hole, of the lower end of the grating support.
Preferably, a positioning ring is arranged at the lower end of the bottom plate, and the motor is fixedly connected with the bottom plate after being positioned by the positioning ring.
Preferably, the bottom plate is provided with a groove at the same side as the incident slit, the grating detection device and the electromagnet are both arranged in the groove, and the two monochromatic light source components extend out of the groove through the folded plate.
Preferably, a transverse plate is also connected between two of the flaps.
Preferably, the side surfaces of the armatures facing the electromagnets are inclined surfaces; an anti-collision soft rubber is arranged on the end face of the electromagnet, which faces the armature.
Preferably, the monochromatic light source component comprises a condensing cylinder, one end of the condensing cylinder is connected with a cylinder cover in a threaded manner, and the inner side of the cylinder cover is buckled with a monochromatic patch LED through a buckle; the other end of the light condensation cylinder is provided with a light outlet.
Preferably, the hole wall of the light emitting hole is in arc transition and is positioned at the hole opening of the light emitting hole to form a smooth plane.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has simple structure, convenient assembly and disassembly, accurate positioning and stable structure, can vertically clamp the grating on the grating support, and simultaneously bonds and fills the structures through the adhesive, thereby reducing the gap, avoiding the shaking or shifting of the grating caused by the existence of the gap, further improving the stability and the reliability of the grating, and being convenient for long-term use.
2. The invention can realize automatic grating detection on the premise of not changing the structure of the light splitting device, thereby detecting the use state of the grating to determine whether maintenance and calibration are carried out, and the grating can be automatically detected without disassembly or other equipment during detection, thereby reducing the procedures and time of calibration and detection.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic view of the structure of a monochromatic light source module;
FIG. 4 is a partial cross-sectional view of FIG. 2;
FIG. 5 is a schematic diagram of the structure of a grating;
reference numerals in the drawings are respectively expressed as: 1. an entrance slit; 2. a monochromatic light source assembly; 3. a folded plate; 4. a connecting ring; 5. a rotating shaft; 6. a torsion spring; 7. a rotating lever; 8. an armature; 9. a groove; 10. a concave mirror; 11. a bottom plate; 12. returning to zero; 13. an exit slit; 14. an optical coupler; 15. a grating; 16. a grating support; 17. a planar mirror; 18. a motor controller; 19. a motor; 20. a transverse plate; 21. an electromagnet; 22. anti-collision soft rubber; 23. a light outlet hole; 24. a condensing cylinder; 25. A cylinder cover; 26. a single color patch LED; 27. a buckle; 28. a clamping seat; 29. a positioning groove; 30. positioning holes; 31. filling the through holes; 32. a ball bearing; 33. a positioning ring; 34. a positioning table; 35. positioning columns; 36. an annular groove; 37. and (5) clamping the column.
Detailed Description
The invention is further described below with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Examples
As shown in fig. 1-5, a stable beam splitter convenient for detection comprises a motor 19, a grating support 16, a grating 15 fixed on the grating support 16, a motor controller 18 for controlling the motor 19, a return-to-zero piece 12 fixed on the top end of the grating support 16 and positioned on the upper part of the grating 15, an optical coupler 14 arranged above the return-to-zero piece 12, and two plane reflectors 17 and concave reflectors 10 both arranged on a bottom plate 11, wherein the bottom plate 11 is fixedly connected with the end surface of the motor 19, the grating support 16 is fixed on a rotating shaft of the motor 19, and the motor 19 and the optical coupler 14 are also connected with the motor controller 18; the two sides of the bottom plate 11, which are positioned on the grating (15), are also respectively provided with an incident slit 1 and an emergent slit 13;
the side surface of the grating support 16, which is fixed with the grating 15, is provided with a positioning groove 29, the middle part and four corners of the positioning groove 29 are respectively provided with a clamping seat 28 and a positioning hole 30, an elastic clamping ring is arranged in the positioning hole 30, the side surface of the grating 15 is provided with a positioning table 34 matched with the positioning groove 29, the middle part and four corners of the positioning table 34 are respectively provided with a clamping column 37 matched with the clamping seat 28 and a positioning column 35 matched with the positioning hole 30, and the circumference of the positioning column 35 is provided with an annular groove 36 matched with the positioning table 34;
the grating 15 is matched with the positioning groove 29 through the positioning table 34, the clamping seat 28 is matched with the clamping column 37, and the positioning hole 30 is matched with the positioning column 35 to be positioned on the side surface of the grating bracket 16; and after the positioning table 34 is matched with the annular groove 36, a cavity is reserved between the positioning table 34 and the annular groove 36, and the cavity is filled with adhesive.
The working principle of the embodiment is as follows: the composite light emitted by the light source firstly passes through the incident slit 1 and is emitted onto the plane reflecting mirror 17, and then the plane reflecting mirror 17 reflects the composite light onto the concave reflecting mirror 10; the concave reflecting mirror 10 receives the composite light, focuses the composite light, and reflects the focused composite light to the grating 15; the grating 15 receives the focused composite light, splits the light, and reflects the split composite light to the concave reflecting mirror 10; the final concave mirror 10 focuses and reflects the split composite light again on the plane mirror 17 near the exit slit 13, and the composite light is reflected by the plane mirror 17 and output through the exit slit 13.
In order to detect whether the position of the grating 15 is inclined or shifted at any time, the grating light splitting device with good stability is further provided with a grating detection device, the grating detection device comprises a connecting ring 4, two monochromatic light source assemblies 2 with different light source intensities and a rotating rod 7 are circumferentially connected to the connecting ring 4, the two monochromatic light source assemblies 2 are positioned on the same side of the connecting ring 4 and are arranged at intervals, the two monochromatic light source assemblies 2 can rotate to the inlet end of the entrance slit 1 and are coaxial with the entrance slit 1, the end part of the rotating rod 7 is connected with an armature 8, and electromagnets 21 are arranged on the two sides of the side face of the bottom plate 11, which are positioned on the two sides of the armature 8; the connecting ring 4 is connected with a rotating shaft 5, and the rotating shaft 5 is rotatably connected with the bottom plate 11; a torsion spring 6 is sleeved outside the rotating shaft 5, and two ends of the torsion spring 6 are fixedly connected with the bottom plate 11 and the connecting ring 4 respectively; the two monochromatic light source assemblies 2 and the two electromagnets 21 are connected with an energizing control switch.
When the position of the grating needs to be detected whether to incline or shift, one of the two electromagnets 21 is controlled to be electrified through the electrified control switch, the electrified electromagnet 21 adsorbs the armature 8 to drive the connecting ring 4 to rotate, at the moment, the torsion spring 6 is driven by the connecting ring 4 to twist the force accumulation, one of the two monochromatic light source components 2 rotates to the inlet end of the entrance slit 1 and is coaxial with the entrance slit 1 after the connecting ring 4 rotates, the circuit of the monochromatic light source component 2 is switched on through the electrified control switch, the monochromatic light source component 2 is started and provides a monochromatic light source, the monochromatic light source outputs from the exit slit 13 through the light path, and as the light intensity of the monochromatic light source component 2 is known, whether the output light has deviation can be detected through detecting the light intensity of the emitted light or observing the proportion of the bright and dark stripes of the emitted light, and further whether the position of the grating has deviation can be obtained, so that whether the device is available or needs maintenance and adjustment can be determined; after the detection is finished, the circuits of the electromagnet 21 and the monochromatic light source assembly 2 are closed, and at the moment, the torsion spring 6 recovers deformation to drive the connecting ring 4 to rotate to the original position; in order to ensure the accuracy of the detection result, the circuit of the other electromagnet 21 and the monochromatic light source assembly 2 can be connected to perform detection again after the detection is completed, and comprehensive analysis is performed by combining the detection results of the electromagnet and the monochromatic light source assembly 2, so that the accuracy of the detection result is improved. The monochromatic light source assembly 2 of this embodiment preferably selects two light sources of different intensities in order to improve the accuracy of detection.
The grating 15 of this embodiment is positioned in the positioning groove 29 through the positioning table 34, and is firmly connected through the matching and clamping of the four positioning posts 35 and the positioning holes 30, and the clamping seat 28 and the clamping post 37 at the middle part can ensure that the middle part of the grating cannot deform, so that the whole plane of the grating keeps the same plane, and meanwhile, the firmness of the grating connection is also increased.
In this embodiment, the cavity between the positioning table 34 and the annular groove 36 is filled with an adhesive, so that the effect of firm connection is increased again after firm connection, and light splitting is prevented from being affected by slight vibration of the grating during operation of the device.
The grating 15 of the embodiment is connected with the grating bracket in a clamping mode, has the characteristics of accurate positioning and stable connection, is good in positioning performance, cannot displace, incline and shake, and improves the accuracy of grating light splitting.
In this embodiment, in order to facilitate filling of the adhesive, a filling through hole 31 communicating with the cavity is further vertically provided at the upper end of the grating support 16. After the grating 15 is installed, the filling through holes can be directly filled with adhesive, so that the filling time and flow are saved.
In this embodiment, a through hole is formed in the bottom plate 11, the lower end portion of the grating support 16 is located in the through hole and connected with the rotating shaft of the motor 19, and a ball bearing 32 is further disposed on the circumference of the portion of the through hole located in the through hole at the lower end of the grating support 16. In the prior art, the lower end of the grating support 16 is directly connected with the rotating shaft of the motor 19 for use, which causes friction between the lower end of the grating support 16 and the bottom plate 11 to affect the rotation of the grating 15, and increases energy consumption, and the friction generates heat to heat the grating 15 to affect the use of the grating, so that the ball bearing 32 is added in the embodiment, thereby reducing the friction force received by the grating support 16 during the rotation, reducing heat generation and ensuring the normal use of the grating 15.
In order to improve the installation accuracy of the grating 15, a positioning ring 33 is disposed at the lower end of the bottom plate 11, and the motor 19 is fixedly connected with the bottom plate 11 after being positioned by the positioning ring 33. The positioning ring 33 can position the motor 19, so that the motor 19 and the grating support 16 are both located on the same axis, the setting position of the grating 15 is ensured, and the light splitting accuracy of the whole device is further improved.
In this embodiment, considering the overall structure of the device, the grooves 9 are formed on the same side of the bottom plate 11 located at the entrance slit 1, the grating detection device and the electromagnet 21 are both disposed in the grooves 9, and both the monochromatic light source assemblies 2 extend out of the grooves 9 through the folded plates 3. Therefore, the grating detection device and the electromagnet 21 can be arranged in the groove 9, cannot protrude out of the bottom plate 11, so that occupied space and volume are reduced, and detection is guaranteed to be realized under the requirement of the original device size structure.
In this embodiment, a transverse plate 20 is also connected between the two flaps 3. The transverse plate 20 can connect the two folded plates 3 into a whole, so that the stability of the two folded plates is improved, and the shaking of the monochromatic light source assembly 2 in the adsorption process of the electromagnet 21 is avoided.
In this embodiment, the sides of the armature 8 facing the electromagnet 21 are inclined surfaces; the end face of the electromagnet 21 facing the armature 8 is provided with an anti-collision soft rubber 22. When the armature 8 is attracted to the electromagnet 21 and is attached to the electromagnet 21, the contact surface of the inclined surface is maximized, so that the attraction force of the electromagnet 21 to the armature 8 can be increased. The anti-collision soft rubber 22 can reduce the impact force of mutual collision between the electromagnet 21 and the armature 8, and reduce the damage of more two.
On the basis of the above technical solution, the monochromatic light source assembly 2 of the embodiment includes a condensing cylinder 24, one end of the condensing cylinder 24 is connected with a cylinder cover 25 by screw thread, and the inner side of the cylinder cover 25 is fastened with a monochromatic patch LED26 by a buckle 27; the other end of the light condensation cylinder 24 is provided with a light outlet 23. The monochromatic light emitted by the monochromatic patch LEDs 26 is condensed by the condensing cylinder 24 and then forms light beams through the light outlet holes 23, and the condensing cylinder 24, the cylinder cover 25 and the monochromatic patch LEDs 26 are all connected in a detachable mode, so that the installation, the debugging and the maintenance are convenient.
The hole wall of the light outlet hole 23 is in arc transition and is positioned at the hole opening of the light outlet hole 23 to form a smooth plane. The pore wall of the light outlet hole 23 is in an arc transition and then tends to form a smooth plane, so that the port position of the light outlet hole 23 is a smooth circumferential surface, the light emitted from the light outlet hole 23 can be ensured to be emitted in a straight line, the light is condensed, the monochromatic light can be ensured to be emitted into the incident slit 1 with little loss, and the detection result is ensured to be accurate.
The above-described embodiments of the present invention. The above embodiments and specific parameters in the embodiments are only for clearly describing the inventive verification process of the inventor, and are not intended to limit the scope of the invention, which is defined by the claims, and all equivalent structural changes made by applying the descriptions and the drawings of the invention are included in the scope of the invention.
Claims (9)
1. The utility model provides a stable light splitter convenient to detect, includes motor (19), grating support (16), fixes grating (15) on grating support (16), is used for controlling motor controller (18) of motor (19), fixes return of zero piece (12) on grating support (16) top and be located grating (15) upper portion, sets up opto-coupler (14) and two plane mirror (17) and concave mirror (10) all set up on bottom plate (11) above return of zero piece (12), bottom plate (11) are fixed continuous with the terminal surface of motor (19), and grating
The bracket (16) is fixed on a rotating shaft of the motor (19), and the motor (19) and the optocoupler (14) are also connected with the motor controller (18); the two sides of the bottom plate (11) positioned on the grating (15) are also respectively provided with an incident slit (1) and an emergent slit (13);
the method is characterized in that:
the side of the grating support (16) fixed with the grating (15) is provided with a positioning groove (29), the middle part and four corners of the positioning groove (29) are respectively provided with a clamping seat (28) and a positioning hole (30), an elastic snap ring is arranged in the positioning hole (30), the side of the grating (15) is provided with a positioning table (34) matched with the positioning groove (29), the middle part and four corners of the positioning table (34) are respectively provided with a clamping column (37) matched with the clamping seat (28) and a positioning column (35) matched with the positioning hole (30), the circumference of the positioning column (35) is provided with an annular groove (36) matched with the positioning table (34), and the annular groove (36) is arranged at a position of the positioning column (35) close to the top;
the grating (15) is matched with the positioning groove (29) through the positioning table (34), the clamping seat (28) is matched with the clamping column (37), and the positioning hole (30) is matched with the positioning column (35) to be positioned on the side surface of the grating bracket (16); after the positioning table (34) is matched with the annular groove (36), a cavity is reserved between the positioning table (34) and the annular groove (36), and the cavity is filled with an adhesive;
the optical splitter further comprises a grating detection device which is arranged on the same side of the incident slit (1) on the bottom plate (11), the grating detection device comprises a connecting ring (4), two monochromatic light source components (2) with different light source intensities and a rotating rod (7) are circumferentially connected to the connecting ring (4), the two monochromatic light source components (2) are arranged on the same side of the connecting ring (4) at intervals, the two monochromatic light source components (2) can rotate to the inlet end of the incident slit (1) and are coaxial with the incident slit (1), an armature (8) is connected to the end part of the rotating rod (7), and electromagnets (21) are arranged on the two sides of the armature (8) on the side face of the bottom plate (11); the connecting ring (4) is connected with a rotating shaft (5), and the rotating shaft (5) is rotatably connected with the bottom plate (11); a torsion spring (6) is sleeved outside the rotating shaft (5), and two ends of the torsion spring (6) are fixedly connected with the bottom plate (11) and the connecting ring (4) respectively;
the two monochromatic light source assemblies (2) and the two electromagnets (21) are connected with an electrifying control switch.
2. The stable optical splitter for facilitating detection according to claim 1, wherein: and a filling through hole (31) communicated with the cavity is further vertically arranged at the upper end of the grating support (16).
3. The stable optical splitter for facilitating detection according to claim 1, wherein: the bottom plate (11) is provided with a through hole, the lower end part of the grating support (16) is positioned in the through hole and connected with a rotating shaft of the motor (19), and a ball bearing (32) is further arranged on the circumference of the part of the through hole, positioned in the through hole, of the lower end of the grating support (16).
4. The stable optical splitter for facilitating detection according to claim 1, wherein: the lower end of the bottom plate (11) is provided with a positioning ring (33), and the motor (19) is fixedly connected with the bottom plate (11) after being positioned by the positioning ring (33).
5. The stable optical splitter for facilitating detection according to claim 1, wherein: the bottom plate (11) is located the same side of the entrance slit (1) and is provided with a groove (9), the grating detection device and the electromagnet (21) are both arranged in the groove (9), and the two monochromatic light source components (2) extend out of the groove (9) through the folded plate (3).
6. The stable optical splitter for facilitating detection according to claim 5, wherein: a transverse plate (20) is also connected between the two folded plates (3).
7. The stable optical splitter for facilitating detection according to claim 1, wherein: the side surfaces of the armatures (8) facing the electromagnets (21) are inclined surfaces; an anti-collision soft rubber (22) is arranged on the end face of the electromagnet (21) facing the armature (8).
8. The stable optical splitter for facilitating detection according to any one of claims 1 to 7, wherein: the monochromatic light source assembly (2) comprises a condensing cylinder (24), one end of the condensing cylinder (24) is connected with a cylinder cover (25) in a threaded manner, and the inner side of the cylinder cover (25) is buckled with a monochromatic patch LED (26) through a buckle (27); the other end of the light condensation cylinder (24) is provided with a light outlet (23).
9. The stable optical splitter for facilitating detection according to claim 8, wherein: the hole wall of the light emergent hole (23) is in arc transition and is positioned at the hole opening of the light emergent hole (23) to form a smooth plane.
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CN103048047A (en) * | 2011-10-11 | 2013-04-17 | 中国科学院微电子研究所 | Vertical incidence broadband polarization spectrometer and optical measurement system comprising a phase element |
CN102410813A (en) * | 2011-12-12 | 2012-04-11 | 上海博泽电机有限公司 | Motor jolt detection device and method |
CN105993166A (en) * | 2013-10-20 | 2016-10-05 | Mtt创新公司 | Light field projectors and methods |
CN104034281A (en) * | 2014-06-16 | 2014-09-10 | 浙江大学 | Optical self-focusing probe used for free-form surface topography measurement |
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