Polarizing body grating structure

Abstract

The utility model discloses a polarizer grating structure which comprises a polarization grating body, the polarization grating body is arranged inside an upper rectangular frame and a lower rectangular frame, an outer frame is fixedly installed on the outer side of the polarization grating body, and meanwhile the surface of the top of the outer frame on the upper portion of the polarization grating body is fixedly connected with a stud. A mounting shaft is fixedly arranged in the center of the bottom of the outer frame on the lower portion of the polarization grating body, a through hole is formed in the center of the surface of the upper rectangular frame and matched with a stud in size, and meanwhile the stud penetrates through the through hole to be fixedly connected with a locking nut in a screwed mode. According to the polarizer grating structure, the upper rectangular frame and the lower rectangular frame are fixed to the positions where the upper rectangular frame and the lower rectangular frame need to be installed, at the moment, the stud is rotated, the locking nut is tightened, and angle adjustment and locking work of the polarization grating body are completed; by adjusting the angle of the polarization grating body, the performance, flexibility and stability of the optical system are improved, so that different application requirements are met.

Description

Technical Field

[0001] The utility model relates to the field of optical systems, in particular to a polarizing body grating structure. Background Art

[0002] A beam splitter is a passive device, also known as an optical splitter. It does not require external energy, as long as there is input light. A common beam splitter consists of an incident and an exit slit, a reflector, and a dispersion element. The key component is the dispersion element, and most beam splitters now use traditional photolithography gratings.

[0003] From the grating equation, we know that for the same spectral order m, for mixed light composed of different wavelengths projected onto the traditional grating at the same incident angle, the interference maximum generated by each wavelength is located at a different angular position; that is, the diffracted light of different wavelengths is emitted at different diffraction angles. This means that for a given grating, the same level of main or secondary maxima of different wavelengths (constituting the different wavelength spectral lines in the spectrum of the same level grating) do not overlap, but are arranged in order of wavelength to form a series of discrete spectral lines. In this way, the composite light of various wavelengths mixed together and incident are separated from each other after diffraction by the grating. This is the spectroscopic principle of the diffraction grating.

[0004] Therefore, the existing light splitting principle based on traditional grating is to split light of different wavelengths, but cannot split light of the same wavelength.

[0005] To solve the above problems, after searching, the prior art discloses (application number: CN202120775081.8) a spectrometer based on a liquid crystal polarization grating; the article states that "the polarization grating is made by orienting the internal molecules of the liquid crystal material. It is a diffraction optical element that realizes selective beam splitting based on the polarization state of the incident light. By controlling the polarization state of the incident light, the polarization grating can adjust the energy distribution between the positive first order and the negative first order; when the polarization state of the incident light beam is different, the polarization grating has different diffraction characteristics."

[0006] When the polarization grating is actually used, its polarization direction and angle of light are fixed, which cannot achieve flexible optics control, cannot improve the performance of the optical system, and cannot adapt to fixed application scenarios. Utility Model Content

[0007] The purpose of the utility model is to provide a polarizing body grating structure to solve the defects mentioned in the above background technology.

[0008] To achieve the above-mentioned purpose, a polarizer grating structure is provided, comprising a polarization grating body, wherein the polarization grating body is arranged inside an upper rectangular frame and a lower rectangular frame, and an outer frame is fixedly installed outside the polarization grating body, and at the same time, the top surface of the outer frame on the upper part of the polarization grating body is fixedly connected with a stud, and a mounting shaft is fixedly arranged at the bottom center of the outer frame on the lower part of the polarization grating body, a through hole is provided at the center of the surface of the upper rectangular frame, and the through hole is adapted to the size of the stud, and at the same time, the stud passes through the through hole and is screwed and fixed with a locking nut.

[0009] Preferably, upper positioning seats are fixedly installed on both sides of the bottom of the upper rectangular frame, and lower positioning seats are fixedly installed on both sides of the top of the lower rectangular frame. At the same time, a T-shaped hole is opened on the lower positioning seat, and a screw hole is opened on the surface of the upper positioning seat.

[0010] Preferably, the cross-sections of the upper positioning seat and the lower positioning seat are both "L"-shaped, and the upper positioning seat and the lower positioning seat are screwed and fixed by bolts, and the bolts pass through the T-shaped holes and are screwed and fixed inside the screw holes, and the upper rectangular frame and the lower rectangular frame are positioned and installed by the upper positioning seat and the lower positioning seat.

[0011] Preferably, an adjustment opening is provided at the bottom of the lower rectangular frame, and the adjustment opening is adapted to the size of the installation shaft, and the installation shaft is movably inserted into the adjustment opening.

[0012] Preferably, the studs are fixed inside the through-holes by locking nuts, and force-bearing openings are provided on both sides of the tops of the stud pairs.

[0013] Preferably, the polarization grating body is movably connected between the upper rectangular frame and the lower rectangular frame, and the polarization grating body is locked inside the upper rectangular frame and the lower rectangular frame by means of studs and locking nuts.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the upper rectangular frame and the lower rectangular frame are fixed at the positions to be installed, and the polarization grating body can be driven to rotate by rotating the studs. When the angle adjustment of the polarization grating body is completed, the locking nut is tightened to complete the angle adjustment and locking of the polarization grating body; by adjusting the angle of the polarization grating body, the performance, flexibility and stability of the optical system are improved, thereby meeting different application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0016] Figure 2 The utility model structure Figure 1 Side view of

[0017] Figure 3The utility model structure Figure 2 A is an enlarged structural diagram;

[0018] Figure 4 This is a schematic diagram of the structure of the structural stud of the utility model.

[0019] Numbers in the figure: 1, upper rectangular frame; 111, lower rectangular frame; 2, outer frame; 3, polarization grating body; 4, mounting axis; 5, adjustment port; 6, stud; 7, through hole; 8, locking nut; 9, force port; 10, upper positioning seat; 11, bolt; 12, lower positioning seat. DETAILED DESCRIPTION

[0020] See also Figure 1-4 The utility model provides a polarizer grating structure, including a polarization grating body 3, which is arranged inside an upper rectangular frame 1 and a lower rectangular frame 111, and an outer frame 2 is fixedly installed on the outer side of the polarization grating body 3, and at the same time, the top surface of the outer frame 2 on the upper part of the polarization grating body 3 is fixedly connected with a stud 6, and a mounting shaft 4 is fixedly arranged at the bottom center of the outer frame 2 on the lower part of the polarization grating body 3, a through hole 7 is opened at the center of the surface of the upper rectangular frame 1, and the through hole 7 is adapted to the size of the stud 6, and at the same time, the stud 6 passes through the through hole 7 and is screwed and fixed with a locking nut 8.

[0021] Working principle: fix the upper rectangular frame 1 and the lower rectangular frame 111 at the position to be installed, and then drive the polarization grating body 3 to rotate by rotating the stud 6. When the angle adjustment of the polarization grating body 3 is completed, tighten the locking nut 8 to complete the angle adjustment and locking of the polarization grating body 3.

[0022] By adjusting the angle of the polarization grating body 3, the performance, flexibility and stability of the optical system are improved to meet different application requirements.

[0023] As a preferred embodiment, the upper positioning seat 10 is fixedly installed on both sides of the bottom of the upper rectangular frame 1, and the lower positioning seat 12 is fixedly installed on both sides of the top of the lower rectangular frame 111. At the same time, a T-shaped hole is opened on the lower positioning seat 12, and a screw hole is opened on the surface of the upper positioning seat 10.

[0024] like Figure 1 As shown, the upper rectangular frame 1 and the lower rectangular frame 111 are connected by bolts 11 , and the polarization grating body 3 can be disassembled and installed by disassembling the upper rectangular frame 1 and the lower rectangular frame 111 .

[0025] As a preferred embodiment, the cross-sections of the upper positioning seat 10 and the lower positioning seat 12 are both "L"-shaped, and the upper positioning seat 10 and the lower positioning seat 12 are screwed and fixed by bolts 11. At the same time, the bolts 11 pass through the T-shaped holes and are screwed and fixed inside the screw holes. The upper rectangular frame 1 and the lower rectangular frame 111 are positioned and installed by the upper positioning seat 10 and the lower positioning seat 12.

[0026] like Figure 1-4 As shown: the setting of the upper positioning seat 10 and the lower positioning seat 12 can perform positioning and installation work between the upper rectangular frame 1 and the lower rectangular frame 111. The upper rectangular frame 1 and the lower rectangular frame 111 are combined together to form an adjustment frame. The polarization grating body 3 is set inside the adjustment frame to perform angle adjustment work on the polarization grating body 3.

[0027] As a preferred implementation, an adjustment opening 5 is provided at the bottom of the lower rectangular frame 111 , and the adjustment opening 5 is adapted to the size of the installation shaft 4 , and the installation shaft 4 is movably inserted into the adjustment opening 5 .

[0028] like Figure 1-2 As shown, when the polarization grating body 3 is rotating, the mounting shaft 4 at the bottom thereof is movably inserted into the inside of the adjustment port 5, so as to limit and guide the polarization grating body 3 when adjusting the angle.

[0029] As a preferred embodiment, the stud 6 is fixed inside the through hole 7 by a locking nut 8, and force-bearing openings 9 are provided on both sides of the top of the pair of studs 6.

[0030] As a preferred implementation, the polarization grating body 3 is movably connected between the upper rectangular frame 1 and the lower rectangular frame 111 , and the polarization grating body 3 is locked inside the upper rectangular frame 1 and the lower rectangular frame 111 by means of studs 6 and locking nuts 8 .

[0031] Both sides of the top of the pair of studs 6 are provided with force-bearing openings 9. The two sets of force-bearing openings 9 are provided to facilitate driving the studs 6 to rotate by a tool; the angle adjustment of the polarization grating body 3 is realized, and the following purposes are achieved by adjusting the angle of the polarization grating body 3:

[0032] 1. More flexible optical control: By adjusting the angle of the polarization grating body 3, the polarization direction and intensity of light can be controlled, thereby achieving more flexible optical control.

[0033] 2. Improve the performance of the optical system: By adjusting the angle of the polarization grating body 3, the performance of the optical system can be optimized, such as improving the transmittance of light, reducing reflection and scattering, etc.

[0034] 3. Adapt to different application scenarios: Different application scenarios require different polarization directions and intensities. By adjusting the angle of the polarization grating body 3, it can adapt to different application scenarios.

[0035] 4. Improve the stability of the optical system: By adjusting the angle of the polarization grating body 3, the influence of factors such as temperature drift and mechanical vibration of the optical system on the polarization direction and intensity of light can be reduced, thereby improving the stability of the optical system.

Claims

1. A polarization grating structure, comprising a polarization grating body (3), characterized in that: The polarization grating body (3) is arranged inside the upper rectangular frame (1) and the lower rectangular frame (111), and the outer side of the polarization grating body (3) is fixedly mounted with an outer frame (2), and the top surface of the outer frame (2) at the upper part of the polarization grating body (3) is fixedly connected to the stud (6), and the mounting shaft (4) is fixedly arranged at the bottom center of the outer frame (2) at the lower part of the polarization grating body (3), a through hole (7) is provided at the center of the surface of the upper rectangular frame (1), and the through hole (7) is adapted to the size of the stud (6), and the stud (6) passes through the through hole (7) and is screwed and fixed to the locking nut (8).

2. A polarizer grating structure according to claim 1, characterized in that: The upper positioning seats (10) are fixedly mounted on both sides of the bottom of the upper rectangular frame (1), and the lower positioning seats (12) are fixedly mounted on both sides of the top of the lower rectangular frame (111), while a T-shaped hole is provided on the lower positioning seat (12), and a screw connection hole is provided on the surface of the upper positioning seat (10).

3. A polarizer grating structure according to claim 2, characterized in that: The cross-sections of the upper positioning seat (10) and the lower positioning seat (12) are both set in an "L" shape, and the upper positioning seat (10) and the lower positioning seat (12) are screwed and fixed by bolts (11), and the bolts (11) pass through the T-shaped holes and are screwed and fixed inside the screw holes. The upper rectangular frame (1) and the lower rectangular frame (111) are positioned and installed by the upper positioning seat (10) and the lower positioning seat (12).

4. The polarizer grating structure according to claim 1, characterized in that: The bottom of the lower rectangular frame (111) is provided with an adjustment opening (5), and the adjustment opening (5) is adapted to the size of the installation shaft (4), while the installation shaft (4) is movably plugged into the inside of the adjustment opening (5).

5. The polarizer grating structure according to claim 1, characterized in that: The studs (6) are fixed inside the through holes (7) by means of locking nuts (8), and force receiving openings (9) are provided on both sides of the top of the pair of studs (6).

6. The polarizer grating structure according to claim 1, characterized in that: The polarization grating body (3) is movably connected between the upper rectangular frame (1) and the lower rectangular frame (111), and the polarization grating body (3) is locked inside the upper rectangular frame (1) and the lower rectangular frame (111) by means of studs (6) and locking nuts (8).

Images