CN202453080U - Rotary doubling optical path interferometer - Google Patents
Rotary doubling optical path interferometer Download PDFInfo
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- CN202453080U CN202453080U CN2012200108008U CN201220010800U CN202453080U CN 202453080 U CN202453080 U CN 202453080U CN 2012200108008 U CN2012200108008 U CN 2012200108008U CN 201220010800 U CN201220010800 U CN 201220010800U CN 202453080 U CN202453080 U CN 202453080U
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- rotary
- optical path
- solid angle
- connecting rod
- interferometer
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Abstract
The utility model provides a rotary doubling optical path interferometer, which is characterized in that plane reflecting mirrors are respectively arranged on a horizontal direction and a vertical direction at an angle of 45 degrees on two sides of a beam splitter and compensation plate composite structure; solid angle reflecting mirrors are respectively arranged on the directions corresponding to the plane reflecting mirrors; the two solid angle reflecting mirrors are respctively connected with a connecting rod by a first swivel bearing; the junction of the two connecting rods is connected with a rotary compass by a second swivel bearing; the rotary compass is rotated to drive one solid angle reflecting mirror on the horizontal direction to carry out horizontal linear movement in a through pipe by the connecting rod; and the rotary compass is rotated to drive the other solid angle reflecting mirror on the vertical direction to carry out vertical linear movement in a through pipe by the connecting rod. The rotary doubling optical path interferometer has the beneficial effects that the rotary doubling optical path interferometer performs dual efficacy on multiplying an effective optical path and achieving an auto-collimation effect in a movement mode of rotating the rotary compass for 360 degrees and inherent optical path collimation effect of the solid angle reflecting mirrors, the Fourier transform infrared spectroscopy (FTIR) resolution is improved, the precision requirement on a guide rail is lowered, and win-win combination of cost and benefit is realized.
Description
Technical field
The utility model relates to a kind of interferometer, and a kind of rotary times of light path interferometer that is applied to Fourier transformation infrared spectrometer (FTIR) also can be used for the Fourier transform spectrometer.
Background technology
Interferometer is the core component of Fourier transformation infrared spectrometer, and it is equivalent to the scanning mechanism of conventional spectrometers, and it obtains all band spectrum interferogram through the scanning of control index glass, and interferogram is carried out the infrared spectrum that Fourier transform just can obtain sample.
In order to obtain desirable spectrogram, necessarily require interferogram that higher resolution is arranged, this just need all have strict requirement to index glass transversal displacement and angular deflection in the process of walking.The index glass kinematic accuracy of the resolution of Fourier transformation infrared spectrometer and interferometer is closely related, as far as high-resolution FTIR, owing to need long light path scanning, so higher to the requirement of guide rail.Early stage interferometer is generally taked the air track structure, and voice coil motor drives.But this apparatus structure complicacy, heaviness and volume are big, and operation and maintenance is all inconvenient, is eliminated gradually.
Existing market main flow interferometer is as shown in Figure 1, and incident light is divided into two-beam through beam splitter 1, separately through horizontal glass 2 and 3 reflections of solid angle catoptron, the interference light that superposes and form then.Its general structure that adopts precision optical machinery guide rail, angle mirror or opal mirror to make catoptron (index glass and horizontal glass); This mode can effectively overcome index glass and tilt to bring influence; Can relax requirement a little, but the axial traversing deviation of hanging down is required harshness more, and adopt this mechanical guide rail generally all need use lubricating oil the guide rail transverse precision; Bring certain trouble for the cleaning ambient of optical system, adopt the FTIR resolution of this structure to be difficult for accomplishing very high.
Summary of the invention
Deficiency to existing interferometer structure; The purpose of the utility model provides a kind of rotary times of light path interferometer; Can under the drive of rotary body, form the effect of times light path; Owing to adopted three-dimensional angle mirror, also improved the degree of accuracy of reflected light path simultaneously, played the effect of collimated light path as catoptron.
For realizing above-mentioned purpose; The technical scheme that the utility model adopts provides a kind of rotary times of light path interferometer; This interferometer includes the beam splitter that is positioned at whole optical path below one side and the composite structure of compensating plate; Also include the siphunculus that is positioned at whole optical path top one side; Wherein: be the level of miter angle in the both sides of said beam splitter and compensating plate composite structure and vertically be respectively equipped with plane mirror on the both direction; Be respectively equipped with the solid angle catoptron on the corresponding direction of said plane mirror, two solid angle catoptrons connect connecting rod through first swivel bearing respectively, the intersection point of two connecting rods is connected with gyrocompass through second swivel bearing; Rotate gyrocompass and in said siphunculus, carry out the motion of horizontal linear, rotate gyrocompass and in siphunculus, carry out the motion of vertical direction through another solid angle catoptron that connecting rod drives on the vertical direction through the solid angle catoptron that connecting rod drives on the horizontal direction.
The effect of the utility model is that this interferometer is by spending the mode of motion and the intrinsic beam path alignment effect of three-dimensional angle mirror itself of rotating with gyrocompass 360; Played and doubled effective light path and reach the double effects of autocollimation effect; The optical path difference that this structure produced is the twice of traditional Michelson interference light path difference, and the resolution of corresponding FTIR can be by original 1.5cm
-1Be accurate to 0.5cm
-1-0.6cm
-1About; Owing to used three-dimensional angle mirror, be beneficial to its intrinsic autocollimation light path effect, simultaneously even if connecting rod has produced skew in motion process; Do not influence the collimation effect of light path yet; The guide rail that generally uses at present needs trueness error to be the 3-6 micron in 0-18 millimeter scope, uses the error range that allows behind this interferometer structure can enlarge the 15-20 micron, thereby has reduced the accuracy requirement to guide rail.Realized that cost combines with the doulbe-sides' victory of benefit.
Description of drawings
Fig. 1 is a conventional interference appearance schematic diagram;
Fig. 2 is the rotary times of light path interferometer schematic diagram of the utility model;
Fig. 3 is the structure of interferometer when the zero degree corner of the utility model;
Fig. 4 is the structure of interferometer when 90 degree corners of the utility model;
Fig. 5 is the structure of interferometer when 180 degree corners of the utility model;
Fig. 6 is the structure of interferometer when 270 degree corners of the utility model.
Among the figure:
1, the composite structure 2 of beam splitter and compensating plate, plane mirror 3, solid angle catoptron
4, first swivel bearing 5, connecting rod 6, second swivel bearing
7, gyrocompass 8, siphunculus
Embodiment
In conjunction with accompanying drawing the structure of the rotary times of light path interferometer of the utility model is explained.
The rotary times of light path interferometer of the utility model includes the beam splitter that is positioned at whole optical path below one side and the composite structure 1 of compensating plate; Also include the siphunculus 8 that is positioned at whole optical path top one side; Be the level of miter angle in the both sides of said beam splitter and compensating plate composite structure 1 and vertically be respectively equipped with plane mirror 2 on the both direction; Be respectively equipped with solid angle catoptron 3 on the said plane mirror 2 corresponding directions; Two solid angle catoptrons 3 connect connecting rod 5 through first swivel bearing 4 respectively; The intersection point of two connecting rods 5 is connected with gyrocompass 7 through second swivel bearing 6; Rotate gyrocompass 7 and in said siphunculus 8, carry out the motion of horizontal linear, rotate gyrocompass 7 and in siphunculus 8, carry out the motion of vertical direction through another solid angle catoptron 3 that connecting rod 5 drives on the vertical direction through the solid angle catoptron 3 that connecting rod 5 drives on the horizontal direction.Use first swivel bearing 4 to be connected between solid angle catoptron 3 and the connecting rod 5, guarantee connecting rod 5 in the process of moving forward and backward, the parallel lines of carrying out that three-dimensional angle mirror 3 is similar under the acting in conjunction of the inwall of siphunculus 8 is moved.Use second swivel bearing 6 to be connected between gyrocompass 7 and the connecting rod 5, act as the rotation in the angle plane is converted into the motion on level or the vertical direction.Described plane mirror 2 all is 45 degree with beam splitter 1 and puts.Solid angle catoptron 3 is level and vertically both direction placement through first swivel bearing 4 and connecting rod 5 respectively.
The rotary times of light path interferometer function of the utility model is achieved in that
As shown in Figure 2, when light passes through the composite structure 1 of beam splitter and compensating plate, receive 50% and see through, the effect of 50% reflectance coating, light splits into the sub-light of two bundles of different directions, carries out horizontal direction and vertical direction and propagates.When light rotated, the connecting rod 5 that drives both direction was done rectilinear motion in the horizontal and vertical directions, touch a plane mirror 2 after; Reflex to corresponding solid angle catoptron 3; This moment, the optical path difference of two-beam line equated, when gyrocompass 7 beginnings are played the effect of accepting at this second swivel bearing 6, at one time; Different directions has just produced the light path of positive negative direction, so just obtained a times optical path difference.Fig. 3-Fig. 6 has described and has rotated the principle that produces times light path under times light path interferometer different rotary angle.This structure can reduce at guide rail makes FTIR keep same resolution under the half stroke situation, can reduce the volume of interferometer so greatly, is easy to realize instrument miniaturization.
In a word; The rotation of the utility model times light path interferometer structure; Produce optical path difference owing to introduce gyrocompass, and use the autocollimation of three-dimensional angle mirror to carry a little, can significantly reduce the volume of conventional interference appearance and do not influence the resolution of FTIR; With in addition can also improve resolution, this to miniaturization of high-end FTIR with intelligent significant.
Claims (1)
1. rotary times of light path interferometer; This interferometer includes the beam splitter that is positioned at whole optical path below one side and the composite structure (1) of compensating plate; Also include the siphunculus (8) that is positioned at whole optical path top one side; It is characterized in that: be the level of miter angle in the both sides of said beam splitter and compensating plate composite structure (1) and vertically be respectively equipped with plane mirror (2) on the both direction; Be respectively equipped with solid angle catoptron (3) on the corresponding direction of said plane mirror (2); Two solid angle catoptrons (3) connect connecting rod (5) through first swivel bearing (4) respectively; The intersection point of two connecting rods (5) is connected with gyrocompass (7) through second swivel bearing (6), rotates gyrocompass (7) and in said siphunculus (8), carries out the motion of horizontal linear through the solid angle catoptron (3) that connecting rod (5) drives on the horizontal direction, rotates gyrocompass (7) and in siphunculus (8), carries out the motion of vertical direction through another solid angle catoptron (3) that connecting rod (5) drives on the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200108008U CN202453080U (en) | 2012-01-11 | 2012-01-11 | Rotary doubling optical path interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200108008U CN202453080U (en) | 2012-01-11 | 2012-01-11 | Rotary doubling optical path interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453080U true CN202453080U (en) | 2012-09-26 |
Family
ID=46868936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200108008U Withdrawn - After Issue CN202453080U (en) | 2012-01-11 | 2012-01-11 | Rotary doubling optical path interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564587A (en) * | 2012-01-11 | 2012-07-11 | 天津港东科技发展股份有限公司 | Rotary multi-optical-path interferometer |
-
2012
- 2012-01-11 CN CN2012200108008U patent/CN202453080U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564587A (en) * | 2012-01-11 | 2012-07-11 | 天津港东科技发展股份有限公司 | Rotary multi-optical-path interferometer |
| CN102564587B (en) * | 2012-01-11 | 2013-08-28 | 天津港东科技发展股份有限公司 | Rotary multi-optical-path interferometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120926 Effective date of abandoning: 20130828 |
|
| RGAV | Abandon patent right to avoid regrant |