CN218630352U - Optical delay device - Google Patents
Optical delay device Download PDFInfo
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- CN218630352U CN218630352U CN202223100475.7U CN202223100475U CN218630352U CN 218630352 U CN218630352 U CN 218630352U CN 202223100475 U CN202223100475 U CN 202223100475U CN 218630352 U CN218630352 U CN 218630352U
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- fixed baffle
- optical delay
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Abstract
The utility model provides an optical delay device, include: the top end of the fixed bottom plate is provided with a sliding structure; the moving block is arranged on the sliding structure and is in sliding connection with the sliding structure, a guide rod is arranged at one end of the sliding structure in the length direction, and an ejector rod is arranged at the other end of the sliding structure; the fixed baffle is arranged on one side of the guide rod back to the moving block; the reset elastic structure is sleeved outside the guide rod, one end of the reset elastic structure facing the fixed baffle is fixed on the fixed baffle, and the end of the reset elastic structure facing away from the fixed baffle is abutted to the moving block; the motor is arranged on one side of the ejector rod back to the moving block, and the top end of the motor is provided with a turntable; the grating ruler is arranged at the top end of the moving block and moves synchronously with the moving block; the reference mirror is arranged at the top end of the moving block; the photoelectric reading head is erected above the grating ruler. Beneficial effect is that the utility model discloses a motor drive carousel drives movable block and reference mirror reciprocating motion to utilize grating chi and photoelectric read head monitoring reference mirror position to carry out the position correction, simple structure, the low but stability height of the assembly degree of difficulty.
Description
Technical Field
The utility model relates to an optical instrument's technical field particularly, relates to an optical delay device.
Background
The optical delay device is an optical device for changing optical path or phase, in the measuring instrument working by using interference principle it has need of optical delay line to change optical path or phase so as to make the optical path of measuring optical path and optical path of reference optical path meet interference condition to implement measurement.
Chinese patent publication No. CN101430422A discloses a periodic scanning optical delay line based on a tilted parabolic bus spiral reflector, which includes: the device comprises an inclined parabolic bus helicoid reflector, a back reflector and a driving motor, wherein the inclined parabolic bus helicoid reflector comprises a convex inclined parabolic bus helicoid reflector and a concave inclined parabolic bus helicoid reflector, and the back reflector is used for controlling light beams to be reflected by the original path of a periodic scanning optical delay line of the inclined parabolic bus helicoid reflector.
Although the periodic scanning optical delay line based on the inclined parabolic bus helicoid reflector is simple in structure, the inclined parabolic bus helicoid is high in processing difficulty and high in processing precision requirement, the rotation shaft is high in assembly difficulty, optical path delay is directly caused to generate large deviation, stability is poor, and quick reciprocating motion of the reference mirror is difficult to achieve.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the problem that solves is: the optical delay device is low in assembly difficulty and high in stability, and can realize quick reciprocating motion of the reference mirror.
In order to solve the above problem, the present invention provides an optical delay device, including:
the top end of the fixed bottom plate is provided with a sliding structure, and the bottom end of the sliding structure is fixedly connected with the fixed bottom plate;
the moving block is arranged at the top end of the sliding structure and is connected with the sliding structure in a sliding mode, a guide rod is arranged at one end of the moving block along the length direction of the sliding structure, and an ejector rod is arranged at the other end of the moving block along the length direction of the sliding structure;
the fixed baffle is arranged on one side, back to the moving block, of the guide rod, and one end, back to the moving block, of the guide rod penetrates through the fixed baffle, so that when the moving block slides on the sliding structure, the guide rod moves synchronously in the fixed baffle;
the resetting elastic structure is arranged between the moving block and the fixed baffle plate and used for providing resilience force to reset the moving block when the moving block moves towards the fixed baffle plate and extrudes the resetting elastic structure;
the motor is arranged on one side, back to the moving block, of the ejector rod, and a rotary disc is arranged at the top end of the motor so that the motor drives the rotary disc to rotate and extrude one end, back to the moving block, of the ejector rod, and the moving block can reciprocate between the fixed baffle and the rotary disc;
the grating ruler is arranged at the top end of the moving block and fixedly connected with the moving block, and the grating ruler moves synchronously when the moving block reciprocates;
the reference mirror is arranged at the top end of the moving block and moves synchronously with the moving block;
and the photoelectric reading head is erected above the grating ruler so as to read the moving signal of the grating ruler when the grating ruler reciprocates along with the moving block.
In this scheme, consider at present generally adopt will on the reference mirror is fixed in automatically controlled slip table, realize optical delay through the automatically controlled slip table back-and-forth movement of motor drive, this kind of method is simple, the stroke is big, but scanning speed is slower, especially when automatically controlled slip table switching motion direction, all need the motor repeated acceleration and deceleration and reverse acceleration and deceleration in the reciprocating motion, and the motor acceleration and deceleration time is longer, is difficult to realize quick reciprocating motion, consequently, in this scheme the outside cover of guide arm is established reset elastic construction motor drive the carousel rotates the extrusion behind the ejector pin, makes the movable block orientation fixed stop removes, and the removal in-process the guide arm orientation the one end extrusion of fixed stop reset elastic construction lasts the accumulation resilience force, treats that the resilience force accumulates and triggers after a certain amount the guide arm resilience force rebounds, realizes quick reciprocating motion.
Furthermore, in the scheme, the sliding structure, the fixed baffle, the photoelectric read head and the motor are fixed on the fixed base plate, and the moving block, the rotary disc and the reset elastic structure are correspondingly installed, so that the assembly is very convenient and the assembly difficulty is low.
Furthermore, the moving block is in stable sliding connection with the sliding structure, the grating ruler and the reference mirror are fixed to the top end of the moving block, and in the process of reciprocating motion of the moving block, the moving block cannot easily shake to cause measurement errors, so that the stability is good.
Preferably, the sliding structure includes:
the sliding rail is arranged at the top end of the fixed bottom plate and is fixedly connected with the fixed bottom plate;
and the sliding block is arranged at the top end of the sliding rail and is in sliding connection with the sliding rail, and the top end of the sliding block is fixedly connected with the moving block.
Preferably, a through hole is formed in the fixed baffle, and one end, back to the moving block, of the guide rod penetrates through the through hole.
Preferably, the inner diameter of the through hole is larger than the outer diameter of the guide rod.
Preferably, the elastic return structure is a spring, the spring is sleeved outside the guide rod, the spring is fixed on the fixed baffle towards one end of the fixed baffle, one end, back to the fixed baffle, of the spring is abutted against the movable block, and the inner diameter of the through hole is smaller than that of the spring.
Preferably, the compression stroke of the reset elastic structure is 1.5 to 2 times of the moving stroke of the moving block.
Preferably, one end of the ejector rod, which faces away from the moving block, is a smooth spherical surface.
Preferably, the signal reading resolution of the photoelectric reading head is less than 50 μm.
Preferably, the surface of the grating ruler is provided with periodic grating bars, and the period range of the periodic grating bars is 5-50 μm.
Preferably, a motor shaft is arranged at the top end of the motor, the turntable is sleeved outside the motor shaft and is fixedly connected with the motor shaft, and the turntable rotates in a non-circular symmetrical mode.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the turntable of the present invention in different shapes;
description of the reference numerals: 1. fixing the bottom plate; 2. a moving block; 3. a guide bar; 4. a top rod; 5. fixing a baffle plate; 6. a reset elastic structure; 7. a motor; 8. a turntable; 9. a grating scale; 10. a reference mirror; 11. an electro-optical read head; 12. a slide rail; 13. a slider; 14. a through hole; 15. a motor shaft.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
In a preferred embodiment of the present invention, based on the above problems existing in the prior art, there is provided an optical delay device, as shown in fig. 1, including:
the top end of the fixed bottom plate 1 is provided with a sliding structure, and the bottom end of the sliding structure is fixedly connected with the fixed bottom plate 1;
the moving block 2 is arranged at the top end of the sliding structure and is in sliding connection with the sliding structure, a guide rod 3 is arranged at one end of the moving block 2 along the length direction of the sliding structure, and an ejector rod 4 is arranged at the other end of the moving block 2 along the length direction of the sliding structure;
the fixed baffle 5 is arranged on one side of the guide rod 3, which is back to the moving block 2, and one end of the guide rod 3, which is back to the moving block 2, is penetrated in the fixed baffle 1, so that when the moving block 2 slides on the sliding structure, the guide rod 2 synchronously moves in the fixed baffle 1;
the resetting elastic structure 6 is arranged between the moving block 2 and the fixed baffle 5 and is used for providing resilience force to reset the moving block 2 when the moving block moves towards the fixed baffle 5 and extrudes the resetting elastic structure 6;
the motor 7 is arranged on one side, back to the moving block 2, of the ejector rod 4, and a rotary disc 8 is arranged at the top end of the motor 7 so that the motor 7 drives the rotary disc 8 to rotate and extrude one end, back to the moving block 2, of the ejector rod 4, and the moving block 2 can reciprocate between the fixed baffle 5 and the rotary disc 8;
the grating ruler 9 is arranged at the top end of the moving block 2 and fixedly connected with the moving block 2, and the grating ruler 9 moves synchronously when the moving block 2 reciprocates;
a reference mirror 10 disposed at the top end of the moving block 2 and moving synchronously with the moving block 2;
and the photoelectric reading head 11 is erected above the grating ruler 9 so as to read a moving signal of the grating ruler 9 when the grating ruler 9 reciprocates along with the moving block 2.
Specifically, in this embodiment, it is considered that the reference mirror 10 is fixed on the electric control sliding table by the current common adoption, the optical delay is realized by driving the electric control sliding table to move back and forth by the motor, although this method is simple, the stroke is large, but the scanning speed is slow, especially when the electric control sliding table changes the motion direction, the motor needs repeated acceleration and deceleration and reverse acceleration and deceleration in the reciprocating motion, and the motor has longer acceleration and deceleration time, and is difficult to realize quick reciprocating motion, therefore, in this scheme, the reset elastic structure 6 is sleeved outside the guide rod 3, after the motor 7 drives the turntable 8 to rotate the extrusion ejector rod 4, the moving block 2 moves towards the fixed baffle 5, the reset elastic structure 6 is extruded towards one end of the fixed baffle 5 by the guide rod 3 in the moving process to continuously accumulate the resilience force, the guide rod 3 is triggered to rebound after the resilience force is accumulated to a certain amount, and quick reciprocating motion is realized.
Preferably, in this scheme, only need be fixed in sliding structure, fixed stop 5, photoelectric read head 11 and motor 7 on PMKD 1, with movable block 2, carousel 8 and the elastic construction 6 that resets correspond the installation can, very convenient and the assembly degree of difficulty is low.
Preferably, the moving block 2 is in stable sliding connection with the sliding structure, the grating ruler 9 and the reference mirror 10 are both fixed at the top end of the moving block 2, and in the process that the moving block 2 reciprocates, the moving block cannot easily shake to cause measurement errors, so that the stability is good.
Preferably, the reference mirror 10 provides a reference light reflection when the grating scale 9 reciprocates.
Specifically, in this embodiment, during specific operation, the motor 7 rotates to drive the turntable 8 to rotate, and the rotation center is fixed and unchanged, so that the distance from the contact point of the turntable 8 and the ejector rod 4 to the rotation center is changed, the ejector rod 4 moves left and right under the extrusion of the turntable 8, the moving block 2 is driven by the movement of the ejector rod 4 to move synchronously, the reference mirror 10 also moves synchronously, the photoelectric reading head 11 reads the moving signal of the grating scale 9, the linear encoder (the grating scale 9+ the photoelectric reading head 11) is used for correcting the nonlinear effect of the "rotation-linear motion" conversion process, and meanwhile, the linear encoder can also correct the deviation caused by assembly.
In a preferred embodiment of the present invention, the sliding structure includes:
the sliding rail 12 is arranged at the top end of the fixed bottom plate 1 and is fixedly connected with the fixed bottom plate 1;
and the sliding block 13 is arranged at the top end of the sliding rail 12 and is in sliding connection with the sliding rail 12, and the top end of the sliding block 13 is fixedly connected with the moving block 2.
Specifically, in this embodiment, the sliding connection mode that the sliding rail 12 and the slider 13 are combined is adopted to realize the movable function of the moving block 2, and this sliding connection mode has better stability, and the transfer difficulty is lower, and has higher practicality.
In the preferred embodiment of the present invention, a through hole 14 is formed on the fixed baffle 5, and one end of the guide rod 3, which faces away from the moving block 2, is inserted into the through hole 14.
Specifically, the guide rod 3 is inserted into the through hole 14 to ensure that the moving block 2 can perform reciprocating motion.
In the preferred embodiment of the present invention, the inner diameter of the through hole 14 is larger than the outer diameter of the guide rod 3.
Specifically, in this embodiment, the inner diameter of the through hole 14 is larger than the outer diameter of the guide rod 3, so as to ensure that the guide rod 3 slides smoothly in the through hole 14, and avoid the occurrence of a blocking phenomenon.
The utility model discloses an in the preferred embodiment, elastic structure 6 resets is the spring, and the spring housing is located the outside of guide arm 3, and on the spring was fixed in fixed stop 5 towards fixed stop 5 one end, the spring was from the one end and the movable block 2 butt of fixed stop 5, and the internal diameter of through-hole 14 was less than the internal diameter of spring.
Specifically, in this embodiment, the elastic return structure 6 is a spring, and the spring is always in a compressed state.
In the preferred embodiment of the present invention, the compression stroke of the elastic restoring structure 6 is 1.5 to 2 times of the moving stroke of the moving block 2.
Specifically, in the present embodiment, the compression stroke of the return elastic structure 6 is set within a reasonable range to ensure that the moving block 2 can smoothly perform the reciprocating motion.
In the preferred embodiment of the present invention, the end of the top rod 4 opposite to the moving block 2 is a spherical surface.
Specifically, in this embodiment, one end of the push rod 3 facing away from the moving block 2 is a smooth spherical surface.
In the preferred embodiment of the present invention, the signal reading resolution of the photoelectric reading head 11 is less than 50 μm.
In the preferred embodiment of the present invention, the surface of the grating ruler 9 is provided with periodic bars, and the period range of the periodic bars is 5-50 μm.
Specifically, in the present embodiment, the surface of the grating ruler 9 is processed with periodic grating bars with different optical reflection (transmission) performances, the period range is 5-50 μm, preferably 10-20 μm, and the signal reading resolution of the photoelectric reading head 11 is less than 50 μm, preferably less than 20 μm.
In the preferred embodiment of the present invention, the top end of the motor 7 is provided with a motor shaft 15, and the turntable 8 is sleeved outside the motor shaft 15 and rotates in a non-circular symmetric manner with the motor shaft 15 and the turntable 8.
Specifically, in this embodiment, as shown in fig. 2, the outer shape of the rotating disk 8 may have various forms, such as an oval shape (a), an eccentric circle shape (b), a rounded rectangle shape (c), and the like, which are regular outer shapes and easy to process, and the basic feature is that the distances from the outer edge of the rotating disk 8 to the central axis are different at different angles.
Preferably, the oval turntable 8 rotates for 1 week, the reference mirror 10 reciprocates for 2 cycles, the round-corner rectangular turntable 8 rotates for 1 week, the reference mirror 10 reciprocates for 4 cycles, and the reciprocating linear movement of the reference mirror 10 can be realized through the unidirectional rotation of the motor 7.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present disclosure.
Claims (10)
1. An optical delay device, comprising:
the top end of the fixed bottom plate (1) is provided with a sliding structure, and the bottom end of the sliding structure is fixedly connected with the fixed bottom plate (1);
the moving block (2) is arranged at the top end of the sliding structure and is connected with the sliding structure in a sliding mode, a guide rod (3) is arranged at one end of the moving block (2) along the length direction of the sliding structure, and a push rod (4) is arranged at the other end of the moving block (2) along the length direction of the sliding structure;
the fixed baffle (5) is arranged on one side, back to the moving block (2), of the guide rod (3), one end, back to the moving block (2), of the guide rod (3) penetrates through the fixed baffle (5), and therefore when the moving block (2) slides on the sliding structure, the guide rod (3) moves synchronously in the fixed baffle (5);
the resetting elastic structure (6) is arranged between the moving block (2) and the fixed baffle (5) and is used for providing resilience force to reset the moving block (2) when the moving block moves towards the fixed baffle (5) and extrudes the resetting elastic structure (6);
the motor (7) is arranged on one side, back to the moving block (2), of the ejector rod (4), a rotary table (8) is arranged at the top end of the motor (7), so that the motor (7) drives the rotary table (8) to rotate and extrude one end, back to the moving block (2), of the ejector rod (4), and the moving block (2) can reciprocate between the fixed baffle (5) and the rotary table (8);
the grating ruler (9) is arranged at the top end of the moving block (2) and fixedly connected with the moving block (2), and the grating ruler (9) moves synchronously when the moving block (2) reciprocates;
the reference mirror (10) is arranged at the top end of the moving block (2) and moves synchronously with the moving block (2);
and the photoelectric reading head (11) is erected above the grating ruler (9) so as to read the moving signal of the grating ruler (9) when the grating ruler (9) reciprocates along with the moving block (2).
2. An optical delay device as claimed in claim 1, wherein the sliding structure comprises:
the sliding rail (12) is arranged at the top end of the fixed bottom plate (1) and is fixedly connected with the fixed bottom plate (1);
the sliding block (13) is arranged at the top end of the sliding rail (12) and is in sliding connection with the sliding rail (12), and the top end of the sliding block (13) is fixedly connected with the moving block (2).
3. The optical delay device of claim 1, wherein the fixed stop (5) has a through hole (14), and an end of the guide rod (3) facing away from the moving block (2) is inserted into the through hole (14).
4. Optical delay device according to claim 3, characterized in that the inner diameter of the through hole (14) is larger than the outer diameter of the guide rod (3).
5. The optical delay device according to claim 3, wherein the elastic return structure (6) is a spring, the spring is sleeved outside the guide rod (3), the spring is fixed on the fixed baffle (5) towards one end of the fixed baffle (5), one end of the spring, which is back to the fixed baffle (5), abuts against the moving block (2), and the inner diameter of the through hole (14) is smaller than the inner diameter of the spring.
6. Optical delay device according to claim 1, characterized in that the return spring arrangement (6) has a compression stroke of 1.5 to 2 times the displacement stroke of the displacement mass (2).
7. Optical delay device according to claim 1, characterized in that the end of the ejector pin (4) facing away from the moving block (2) is a smooth spherical surface.
8. Optical delay device according to claim 1, characterized in that the signal reading resolution of the optoelectronic reading head (11) is less than 50 μm.
9. Optical delay device according to claim 1, characterized in that the surface of the grating ruler (9) is provided with a periodic grating and the period of the periodic grating ranges from 5 to 50 μm.
10. Optical delay device according to claim 1, wherein a motor shaft (15) is provided at the top end of the motor (7), the turntable (8) is sleeved outside the motor shaft (15) and fixedly connected to the motor shaft (15), and the turntable (8) rotates in a non-circular symmetric manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223100475.7U CN218630352U (en) | 2022-11-22 | 2022-11-22 | Optical delay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223100475.7U CN218630352U (en) | 2022-11-22 | 2022-11-22 | Optical delay device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218630352U true CN218630352U (en) | 2023-03-14 |
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ID=85447585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223100475.7U Active CN218630352U (en) | 2022-11-22 | 2022-11-22 | Optical delay device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218630352U (en) |
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2022
- 2022-11-22 CN CN202223100475.7U patent/CN218630352U/en active Active
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