CN212341601U - Michelson interferometer measuring device - Google Patents
Michelson interferometer measuring device Download PDFInfo
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- CN212341601U CN212341601U CN202021057593.2U CN202021057593U CN212341601U CN 212341601 U CN212341601 U CN 212341601U CN 202021057593 U CN202021057593 U CN 202021057593U CN 212341601 U CN212341601 U CN 212341601U
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Abstract
A measuring device of Michelson interferometer comprises a base, a test bed and a digital caliper, wherein the test bed is fixed on the upper surface of the base through a support column, threaded groove holes are formed in four vertex angles of the base, a leveling screw is in threaded connection with each threaded groove hole, a track mounting groove is formed in the upper surface of the test bed, two parallel tracks are fixed in the track mounting groove along the direction vertical to the front side edge of the test bed, sliding blocks are connected in a sliding and bridging mode on the two parallel tracks, an M2 plane mirror is fixed on each sliding block, a beam splitter, a compensating mirror and an M1 plane mirror are sequentially arranged at the rear part of the test bed, the M1 plane mirror is perpendicular to the M2 plane mirror, an observation screen is arranged at the rear part of the beam splitter through a support, and a lead screw is rotationally connected in the track mounting groove, the utility model discloses a gear is arranged on the lead screw to convert M, the gear transmission is accurate, and the reading can be completed quickly.
Description
Technical Field
The utility model relates to an interferometer especially relates to a michelson interferometer measuring device.
Background
The michelson interferometer is a precision instrument for measuring the small length and the change thereof by using the interference phenomenon of light, the measurement precision can reach half optical wavelength, and the principle of the michelson interferometer is that a beam of incident light is divided into two beams which are respectively reflected by corresponding plane mirrors, so that the two beams of light can interfere. The different optical paths of the two beams in interference can be realized by adjusting the length of the interference arm and changing the refractive index of the medium, so that different interference patterns can be formed. Since the interference fringes are the locus of the equal optical path difference points, it is necessary to determine a function of the position distribution of the optical path difference of the coherent light beam in order to analyze a pattern generated by some kind of interference. G2 is a semi-transparent and semi-reflective film plated on one side, G1 is a compensation plate, M1 and M2 are plane mirrors, M1 is fixed, M2 is connected with a precision wire so that the plane mirrors can move forwards and backwards, the minimum reading is 10-4mm, 10-5mm can be estimated, and the positions of the plane mirrors can be adjusted by a plurality of small screws behind M1 and M2. When M2 and M1' are strictly parallel, M2 moves, and the circular fringes appearing as equal tilt interference are continuously "spit" from the center or "swallow" toward the center. When the 'air gap' distance between the two plane mirrors is increased, the center can 'spit' stripes; otherwise, the Chinese character is swallowed. When M2 and M1' are not strictly parallel, the interference fringes are expressed as equal-thickness interference fringes, when M2 moves, the fringes continuously move over a certain mark position in a visual field, and the relation between the translation distance d of M2 and the movement number N of the fringes satisfies the following conditions: d is N λ/2, λ is the wavelength of the incident light.
Generally, the michelson interferometer is divided into two types, namely a lock type michelson interferometer and a lock-free type michelson interferometer, the corresponding relation between a hand wheel and a micro-motion drum wheel can be guaranteed, but the operation is complex and is difficult to master, and the experiment is often failed due to improper operation; according to the Michelson interferometer without the lock, a hand wheel and a micro drum wheel frame are in friction transmission, the hand wheel is roughly adjusted once, the micro drum wheel is not moved, the hand wheel and the micro drum wheel do not have a corresponding relation, and the hand wheel and the micro drum wheel are staggered, so that reading cannot be conducted.
Disclosure of Invention
The utility model provides a measurement difficulty bottom, michelson interferometer measuring device of simple operation for solving the above problems.
The utility model discloses the technical scheme who takes:
a measuring device of a Michelson interferometer comprises a base, a test bed and a digital display caliper, wherein the test bed is fixed on the upper surface of the base through support columns, threaded slotted holes are formed in four top corners of the lower surface of the base, leveling screws are in threaded connection with each threaded slotted hole, a track mounting groove is formed in the upper surface of the test bed, two parallel tracks are fixed in the track mounting groove in the direction perpendicular to the front side edge of the test bed, sliding blocks are connected on the two parallel tracks in a sliding and bridging mode, an M2 plane mirror is fixed on each sliding block, a beam splitter, a compensating mirror and an M1 plane mirror are sequentially arranged at the rear part of the test bed, the M1 plane mirror is perpendicular to the M2 plane mirror, an observation screen is arranged behind the beam splitter through a support, a lead screw is rotatably connected between side walls connected with two ends of the two parallel tracks in the track mounting groove, one end of the lead screw penetrates through the side wall, the screw is sleeved on the lead screw in the track mounting groove, the top of the screw is fixedly connected with the bottom of the sliding block, a rack mounting plate is fixed below the gear on the side wall of the test bed, a rack sliding groove is formed in the rack mounting plate, a rack is connected in the rack sliding groove in a sliding mode, the rack is meshed with the gear to the bottom, and a digital display caliper for measuring the movement distance of the rack is fixed on the side wall of the test bed.
And an anti-skid rubber pad is fixed at the bottom of the leveling screw.
The top of rack mounting panel on the lateral wall before the test bench be fixed with the slide caliper rule fixed plate, fixed measuring head digital display slide caliper rule down on the slide caliper rule fixed plate.
The movable measuring head of the digital caliper is attached to the right end head of the rack.
The diameter of the gear is larger than that of the adjusting hand wheel, the pitch of the gear is 2 times that of the lead screw, the moving distance of the rack is 2 times that of the sliding block, and the lead screw is a high-precision ball screw with a lead of 2mm and a zero clearance.
One surface of the beam splitter is plated with a semi-emitting metal film.
The compensating mirror comprises a compensating mirror A and a compensating mirror B, and the compensating mirror A and the compensating mirror B are fixed on the test bed through a positioning shaft.
The compensating mirror A and the compensating mirror B are arranged at an angle of 90 degrees, and the compensating mirror A and the compensating mirror B are arranged at an angle of 45 degrees with the M2 plane mirror.
A measurement method of a Michelson interferometer comprises the following steps:
a. a monochromatic light source irradiates a beam splitter, an adjusting hand wheel is screwed to enable a lead screw to rotate, a sliding block connected on a track is driven to move, an M2 plane mirror on the sliding block generates displacement under the action of the lead screw until interference fringes are called out, a gear also rotates while the lead screw rotates, a rack meshed with the gear generates displacement, and the displacement is directly measured by a digital display caliper to be S1;
b. and (4) calculating the moving distance of the M2 plane mirror, wherein the number of teeth of the gear is n, and the moving distance of the M2 plane mirror is S1/2.
The utility model has the advantages that: the utility model discloses a set up the gear on the lead screw and move M2 level crossing conversion for the rack and remove, directly measure the amount of movement by the digital display slide caliper rule of fixing in the rack top, easy operation, the gear transmission is accurate, can accomplish the reading fast.
Drawings
Fig. 1 is a top view of the structure of the present invention.
Fig. 2 is a front view of the structure of the present invention.
Wherein: 1-test bed; 2-a beam splitter; 3-a viewing screen; 4-a compensation mirror A; 5-positioning the shaft; 6-a compensation mirror B; 7-M1 plane mirror; 8-a track mounting groove; 9-a lead screw; 10-a slider; 11-M2 flat mirror; 12-a track; 13-a rack mounting plate; 14-a rack runner; 15-a rack; 16-adjusting the hand wheel; 17-a gear; 18-a movable measuring head; 19-digital display caliper; 20-caliper fixing plate; 21-a base; 22-leveling screws; 23-support column.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
A measuring device of a Michelson interferometer comprises a base 21, a test bed 1 and a digital caliper 19, wherein the test bed 1 is fixed on the upper surface of the base 21 through a support column 23, threaded slotted holes are formed in four top corners of the lower surface of the base 21, a leveling screw 22 is connected in each threaded slotted hole in a threaded manner, a track mounting groove 8 is formed in the upper surface of the test bed 1, two parallel tracks 12 are fixed in the track mounting groove 8 along a direction vertical to the front side wall of the test bed 1, sliding blocks 10 are connected on the two parallel tracks 12 in a sliding and bridging manner, an M2 plane mirror 11 is fixed on the sliding blocks 10, a beam splitter 2, a compensating mirror and an M1 plane mirror 7 are sequentially arranged at the rear part of the test bed 1, the M1 plane mirror 7 is vertical to the M2 plane mirror 11, an observation screen 3 is arranged behind the beam splitter 2 through a support, and a lead screw 9 is rotatably connected between, and the one end of lead screw 9 runs through from 8 lateral walls of track mounting groove, and the preceding lateral wall that wears out test bench 1 connects gradually gear 17 and adjusting hand wheel 16 at the end, cup joint the screw on lead screw 9 in track mounting groove 8, the top and the sliding block 10 bottom fixed connection of screw, the below of gear 17 is fixed with rack mounting panel 13 on the lateral wall before test bench 1, rack chute 14 has been seted up on rack mounting panel 13, sliding connection has rack 15 in rack chute 14, rack 15 changes the tooth meshing to the bottom with gear 17, be fixed with digital display slide caliper 19 of measuring rack 15 moving distance on the lateral wall before test bench 1.
The bottom of the leveling screw 22 is fixed with an anti-skid rubber pad.
A caliper fixing plate 20 is fixed above the rack mounting plate 13 on the front side wall of the test bed 1, and a measuring head downward digital caliper 19 is fixed on the caliper fixing plate 20.
And a movable measuring head 18 of the digital caliper 19 is attached and connected with the right end head of the rack 15.
The diameter of the gear 17 is larger than that of the adjusting hand wheel 16, the pitch of the gear 17 is 2 times of that of the lead screw 9, the moving distance of the rack 15 is 2 times of that of the sliding block 10, and the lead screw 9 is a high-precision ball screw with a lead of 2mm and a zero clearance.
One surface of the beam splitter 2 is plated with a semi-emitting metal film.
The compensation mirror comprises a compensation mirror A4 and a compensation mirror B6, and the compensation mirror A4 and the compensation mirror B6 are fixed on the test bed 1 through a positioning shaft 5.
The compensating mirror A4 and the compensating mirror B6 are arranged at an angle of 90 degrees, and the compensating mirror A4 and the compensating mirror B6 are arranged at an angle of 45 degrees with the M2 flat mirror 11.
The working principle is as follows: the process that lead screw 9 rotated a circle and moved the movable block 10 forward is 2mm, and the gear 17 on the lead screw 9 and the lead screw 9 are coaxial, and lead screw 9 rotated a circle gear 17 also will rotate a circle, and the pitch of gear 17 is 2 times of the lead screw 9 pitch, then lead screw 9 rotated a circle after, rack 15 displacement was pitch number of teeth, 2 pitch number of teeth promptly, so the distance that movable block 10 moved is 1/2 number of teeth of rack 15 displacement.
A measurement method of a Michelson interferometer comprises the following steps:
a. the monochromatic light source irradiates the beam splitter 2, the adjusting hand wheel 16 is screwed to enable the lead screw 9 to rotate, the sliding block 10 connected to the track 12 is driven to move, the M2 plane mirror 11 on the sliding block 10 generates displacement under the action of the lead screw 9 until interference fringes are called out, the gear 17 also rotates when the lead screw 9 rotates, the rack 15 meshed with the gear 17 generates displacement, and the displacement is directly measured by the digital caliper 19 to be S1;
b. the moving distance of the M2 flat mirror 11 is calculated, the number of teeth of the gear is n, and the moving distance of the M2 flat mirror 11 is S1/2 n.
Example 1
A measuring device of a Michelson interferometer comprises a base 21, a test bed 1 and a digital caliper 19, wherein the test bed 1 is fixed on the upper surface of the base 21 through a support column 23, threaded slotted holes are formed in four top corners of the lower surface of the base 21, a leveling screw 22 is connected in each threaded slotted hole in a threaded manner, a track mounting groove 8 is formed in the upper surface of the test bed 1, two parallel tracks 12 are fixed in the track mounting groove 8 along a direction vertical to the front side wall of the test bed 1, sliding blocks 10 are connected on the two parallel tracks 12 in a sliding and bridging manner, an M2 plane mirror 11 is fixed on the sliding blocks 10, a beam splitter 2, a compensating mirror and an M1 plane mirror 7 are sequentially arranged at the rear part of the test bed 1, the M1 plane mirror 7 is vertical to the M2 plane mirror 11, an observation screen 3 is arranged behind the beam splitter 2 through a support, and a lead screw 9 is rotatably connected between, one end of a screw 9 penetrates through the side wall of the track mounting groove 8 and penetrates out of the front side wall of the test bed 1, a gear 17 and an adjusting hand wheel 16 are sequentially connected with the end head of the front side wall of the test bed 1, a nut is sleeved on the screw 9 in the track mounting groove 8, the top of the nut is fixedly connected with the bottom of a sliding block 10, a rack mounting plate 13 is fixed below the gear 17 on the front side wall of the test bed 1, a rack sliding groove 14 is formed in the rack mounting plate 13, a rack 15 is connected in the rack sliding groove 14 in a sliding manner, the rack 15 is meshed with teeth rotated to the bottom by the gear 17, a digital display caliper 19 for measuring the movement distance of the rack 15 is fixed on the front side wall of the test bed 1, the diameter of the gear 17 is larger than the diameter of the adjusting hand wheel 16, the pitch of the gear 17 is 2 times the pitch of the screw 9, the movement distance of the rack, when in measurement, a monochromatic light source irradiates the beam splitter 2, the adjusting hand wheel 16 is screwed to enable the lead screw 9 to rotate, the sliding block 10 connected to the track 12 is driven to move, the M2 plane mirror 11 on the sliding block 10 generates displacement under the action of the lead screw 9 until interference fringes are called, the gear 17 also rotates while the lead screw 9 rotates, the rack 15 meshed with the gear 17 generates displacement, the displacement is directly measured by the digital caliper 19 to be S1, the moving distance of the M2 plane mirror 11 is calculated, the number of teeth of the gear is 40, and the moving distance of the M2 plane mirror 11 is S1/2 × 40.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. The measuring device of the Michelson interferometer is characterized by comprising a base (21), a test bed (1) and a digital caliper (19), wherein the test bed (1) is fixed on the upper surface of the base (21) through a support column (23), threaded slotted holes are formed in four top corners of the lower surface of the base (21), leveling screws (22) are connected into each threaded slotted hole in a threaded manner, a track mounting groove (8) is formed in the upper surface of the test bed (1), two parallel tracks (12) are fixed in the track mounting groove (8) along a direction perpendicular to the front side wall of the test bed (1), sliding blocks (10) are connected onto the two parallel tracks (12) in a sliding and crossing manner, M2 plane mirrors (11) are fixed on the sliding blocks (10), a beam splitter (2), a compensating mirror and an M1 plane mirror (7) are sequentially arranged at the rear part of the test bed (1), the M1 plane mirror (7) is perpendicular to the M2 (, the rear part of the beam splitter (2) is provided with an observation screen (3) through a bracket, a screw rod (9) is rotatably connected between the side walls connected with the two ends of the two parallel rails (12) in the rail mounting groove (8), one end of the screw rod (9) penetrates through the side wall of the rail mounting groove (8), and penetrates out of the front side wall of the test bed (1) and is connected with a gear (17) and an adjusting hand wheel (16) in sequence at the end head, the screw is sleeved on a lead screw (9) in a track mounting groove (8), the top of the screw is fixedly connected with the bottom of a sliding block (10), a rack mounting plate (13) is fixed below a gear (17) on the front side wall of a test bed (1), a rack sliding groove (14) is formed in the rack mounting plate (13), a rack (15) is connected in the rack sliding groove (14) in a sliding mode, the rack (15) is meshed with teeth of the bottom in a rotating mode through the gear (17), and a digital display caliper (19) for measuring the movement distance of the rack (15) is fixed on the front side wall of the test bed (1).
2. The michelson interferometer apparatus of claim 1, wherein the leveling screw (22) has a non-slip rubber pad secured to its bottom.
3. The michelson interferometer measuring device according to claim 1, wherein a caliper fixing plate (20) is fixed above the rack mounting plate (13) on the front side wall of the test bed (1), and a measuring head of a downward digital caliper (19) is fixed on the caliper fixing plate (20).
4. The michelson interferometer measuring device according to claim 3, wherein the movable measuring head (18) of the digital caliper (19) is attached to the right end of the rack (15).
5. The michelson interferometer apparatus of claim 1, wherein the diameter of the gear (17) is greater than the diameter of the adjusting hand wheel (16), the pitch of the gear (17) is 2 times the pitch of the screw (9), the distance traveled by the rack (15) is 2 times the distance traveled by the slider (10), and the screw (9) is a zero-clearance, 2mm lead, high precision ball screw.
6. The michelson interferometer apparatus of claim 1, wherein one surface of the beam splitter (2) is coated with a semi-emissive metal film.
7. The michelson interferometer apparatus of claim 1, wherein the compensator comprises a compensator a (4) and a compensator B (6), and the compensator a (4) and the compensator B (6) are fixed on the test bed (1) by the positioning shaft (5).
8. The michelson interferometer measurement device of claim 7, wherein the compensation mirror a (4) and the compensation mirror B (6) are disposed at an angle of 90 °, and the compensation mirror a (4) and the compensation mirror B (6) are disposed at an angle of 45 ° with respect to the M2 flat mirror (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021057593.2U CN212341601U (en) | 2020-06-10 | 2020-06-10 | Michelson interferometer measuring device |
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| CN202021057593.2U CN212341601U (en) | 2020-06-10 | 2020-06-10 | Michelson interferometer measuring device |
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| CN212341601U true CN212341601U (en) | 2021-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665620A (en) * | 2020-06-10 | 2020-09-15 | 伊普希龙（天津）科技有限公司 | Michelson interferometer measuring device and measuring method thereof |
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- 2020-06-10 CN CN202021057593.2U patent/CN212341601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665620A (en) * | 2020-06-10 | 2020-09-15 | 伊普希龙（天津）科技有限公司 | Michelson interferometer measuring device and measuring method thereof |
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