Neutral optical filter rotating device

Abstract

The utility model provides a neutral optical filter rotating device, which comprises a rotator main body with a hollow area inside; the first sliding bearing is arranged at the end outlet position of the first end of the hollow area; the second sliding bearing is arranged at the end outlet position of the second end of the hollow area; the rotating main shaft penetrates through the hollow area, and the flange face of the rotating main shaft is tightly attached to the end face of the first sliding bearing, so that axial positioning is achieved; the optical filter is arranged on the rotating main shaft; the manual drive plate is arranged on the end face of the second sliding bearing. According to the utility model, aiming at some light paths which do not need to pursue high precision, the optical filter is rotated by the hand-operated dial wheel through a mechanical structure, the locking function can be realized, the complexity is reduced, the cost is reduced, and the efficiency is improved. And meanwhile, compatibility is good, the influence of the outer diameter of the optical filter is avoided, and multiple models can be universally used.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the verification or calibration of the light splitting instrument, and particularly relates to a neutral filter rotating device. BACKGROUND

[0002] In the prior art, the neutral density filter, i.e. the ND filter, can attenuate light intensity. After the light in the visible light region to the near-infrared region range passes through the neutral density filter, different wavelengths are attenuated according to the same proportion, so that the optical element maintains approximately equal light energy transmittance in a wide waveband, and can be widely applied to various laser devices, optical communication attenuation filters, optical imaging systems, optical measuring instruments and other fields.

[0003] Since many neutral density filters are designed to attenuate wide-spectrum low-energy laser from ultraviolet to near-infrared waveband. For example, the circular variable neutral filter of Newport, the OD range of the coating is 0-4.0. Therefore, only by rotating the filter from 0° to 270°, the optical density gradient can be changed around 0-1.0, 0-2.0 and 0-4.0. However, the mainstream neutral filter rotating structure at present is a rotating platform driven by a motor, which is expensive and has poor adaptability, and can only drive neutral filters with fixed diameters, such as the automatic rotating neutral filter / OSMS-60-NDU of Sigma-Koki.

[0004] Therefore, for some optical paths that do not need to pursue high accuracy, an economical neutral filter rotating device is needed. CONTENT OF THE UTILITY MODEL

[0005] To solve the above problems, the utility model provides an economical neutral filter rotating device, characterized by comprising:

[0006] A rotator main body has a hollow area inside;

[0007] A first sliding bearing is arranged at the end exit position of the first end of the hollow area;

[0008] A second sliding bearing is arranged at the end exit position of the second end of the hollow area;

[0009] A rotating main shaft penetrates the hollow area, and the flange surface of the rotating main shaft contacts the end surface of the first sliding bearing to realize axial positioning;

[0010] A filter is arranged on the rotating main shaft; and

[0011] A manual dial is arranged at the end surface of the second sliding bearing.

[0012] In an embodiment of the utility model, still include positioning pin and fixed bolt, to be used for fixing the rotator main part.

[0013] In another embodiment of the utility model, still include washer, the washer set up in the filter both sides, realize the locking of the filter through the pressure and friction force of washer.

[0014] In another embodiment of the utility model, still include lock disc nut, set up in the rotating main shaft end, to be used for locking the filter through the thread shear force.

[0015] In another embodiment of the utility model, still include lock axle nut, set up in the second sliding bearing end, to be used for locking the manual dial.

[0016] In another embodiment of the utility model, still include tight screw, set up in the rotator main part, to be used for providing a fixed pressure for the rotating main shaft, avoid shaft rotation.

[0017] In another embodiment of the utility model, the manual dial is engraved with standard scale, wherein every 5 ° is engraved with a short line, every 10 ° is engraved with a middle line, and every 30 ° is engraved with a long line.

[0018] In another embodiment of the utility model, the manual dial is configured with a reserved hole, to be used for installing a pointing structure, and the pointing structure is configured to reflect the degree of each rotation.

[0019] In another embodiment of the utility model, the washer is an epoxy resin washer, to be used for protecting the filter from direct contact with metal, improving the thermal compensation performance of the device, and protecting the filter when thermal strain is generated at variable temperature.

[0020] In another embodiment of the utility model, the sliding bearing is made of plastic.

[0021] The utility model has the following beneficial effects:

[0022] (1) low cost, high practicality, the device is without rotating motor and other electronic components, adopts pure mechanical structure, and the manufacturing cost is low, the maintenance cost is low, and can be applicable to all ND filters of different outer diameters and same inner diameters, if the inner diameters of filters are different, the rotating main shaft can also be directly replaced, and other structures remain unchanged.

[0023] (2) low friction loss, smooth operation, the same metal or mutual solubility of material friction pair is easy to stick wear, the device of the present application rotating spindle and the main body of the rotator through the plastic sliding bearing cooperation to realize low wear, high smooth operation. ND filter and the front and rear two epoxy washer contact, epoxy resin has high CTE (high thermal expansion coefficient), has elasticity, can protect the ND filter not with metal direct contact, prevent wear and tear at the same time improve the device thermal compensation performance, in the temperature generated thermal strain when protecting the filter, improve the overall structure performance. Elastic nylon setscrew contact with the stainless steel surface of the rotating spindle, friction, better to achieve locking effect.

[0024] (3) simple operation, locking, through the simple manual dial can realize stable operation of the filter, at the same time provides locking nut and setscrew for double locking. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure schematic diagram in an embodiment of the present application is shown;

[0026] Figure 2 The device perspective view in an embodiment of the present application is shown;

[0027] Figure 3 The rotating spindle detail view in an embodiment of the present application is shown;

[0028] Figure 4 The manual dial structure schematic diagram in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] In the following description, the present application is described with reference to various embodiments. Those skilled in the art will recognize, however, that the various embodiments can be practiced without one or more of the specific details, or with other replacement and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations have not been shown or described in detail in order to avoid obscuring aspects of the application. Likewise, the term "exemplary" as may be used herein means an example, and is not necessarily to be construed as preferred or advantageous over other examples. Likewise, the term "embodiment" as may be used herein means an example and is not necessarily to be construed as preferred or advantageous over other examples. Similarly, for purposes of explanation, specific numbers, materials, and configurations are set forth in order to provide a thorough understanding of the embodiments of the application. However, the application can be practiced without specific details, or with other methods, materials, and components, as long as the spirit of the application is maintained. Furthermore, one skilled in the art will recognize that the embodiments shown in the drawings are illustrative only and not necessarily drawn to scale.

[0030] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not mean or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating relative importance.

[0031] In the present specification, the reference to "one embodiment" or "the embodiment" means that the particular feature, structure or characteristic described in connection with this embodiment is included in at least one embodiment of the present application. The phrase "in one embodiment" appearing throughout the specification does not necessarily all refer to the same embodiment.

[0032] Figure 1 The overall structure schematic diagram in an embodiment of the present application is shown.

[0033] The present application provides an economical neutral filter rotating device, as shown in the figure, comprising the following components:

[0034] The rotator body 01 has a hollow area inside, which is accurately fixed in the desired position by the positioning pin 10 and the fixing bolt 11. The rotator body 01 of the present embodiment cannot adjust the height, and in other embodiments of the present application, it can be replaced by a sleeve structure or a screw structure to realize the adjustment of the height.

[0035] The ND filter 02, i.e. the neutral density filter, can attenuate light intensity. After the light in the visible light region to the near-infrared region range passes through the neutral density filter, different wavelengths are attenuated according to the same proportion, so that the optical element maintains approximately equal light energy transmittance in a wide wavelength band.

[0036] The epoxy ring 03 is arranged on the front and rear sides of the ND filter 02, and the ND filter 02 is in contact with the front and rear epoxy rings. Since the epoxy resin has a high CTE (high thermal expansion coefficient) and is elastic, it can protect the ND filter from direct contact with metal, prevent wear and tear, improve the thermal compensation performance of the device, and protect the filter when thermal strain occurs at variable temperature, improving the overall structural performance.

[0037] The lock disc nut 04 is used to lock the ND filter 02.

[0038] Rotating main shaft 05, epoxy washer 03, ND filter 02, epoxy washer 03 are sequentially arranged on the rotating main shaft 05, lock disc nut 04 arranged at the end of the rotating main shaft 05 is screwed, and the locking of the ND filter 02 is realized through the thread shear force, the pressure of the epoxy washer 03 and the friction force.

[0039] Plastic sliding bearing 06 is arranged at the outlet of the hollow area of the rotator body 01, the outer diameter of the plastic sliding bearing is equal to the inner diameter of the hollow, the bearing is pressed into the hollow section, the rotating main shaft 05 cooperates with the plastic sliding bearing 06, and the flange surface of the rotating main shaft 05 tightly abuts against the end surface of the plastic sliding bearing 06 to realize axial positioning.

[0040] Manual dial 07 is arranged on the plastic sliding bearing 06 at the other end, the manual dial 07 is engraved with standard scales, a short line is engraved every 5 degrees, a middle line is engraved every 10 degrees, and a long line is engraved every 30 degrees, so that certain rotation visualization is guaranteed, the manual dial 07 has a reserved hole 13, a pointing structure can be installed, and thus the degree of each rotation can be clearly and intuitively reflected, and the practicability is higher. In the embodiment, an economic type is pursued, and a precise adjusting device is not selected. In other embodiments of the utility model, the manual dial 07 can also be replaced by a thousandth adjusting screw or a precise leveling seat, and an optical screw with smaller pitch is used.

[0041] Locking shaft nut 08 is used to lock the manual dial 07.

[0042] Tightening screw 09 is arranged on the rotator body 01, in order to make the fixing more reliable, the tightening screw 09 is screwed in, and the rotating main shaft 05 is pressed to avoid rotation.

[0043] Figure 2 A perspective view of the device in an embodiment of the utility model is shown.

[0044] As shown in Figure 2 , the internal hollow area of the rotator body 01 is directly shown, the rotating main shaft 05 penetrates through the hollow area of the rotator body 01, and cooperates with the two plastic sliding bearings 06 at the two outlet ends. The elastic tightening screw 09 is in contact with the stainless steel surface of the rotating main shaft 05, so that greater friction force is obtained, and a better locking effect is realized.

[0045] Figure 3 A detailed view of the rotating main shaft in an embodiment of the utility model is shown, and Figure 4 A structure schematic view of the manual dial in an embodiment of the utility model is shown.

[0046] It can be known from Figure 3 and Figure 4 that the end of the rotating main shaft 05 has a milled groove, and the same groove hole is milled in the center of the manual dial 07, so that the rotating main shaft 05 and the manual dial 07 can be synchronously rotated without slipping.

[0047] The device assembly process is as follows, 01 is a rotator body, hollow inside, and fixed in the expected position by positioning pin 10 and fixing bolt 11.

[0048] Two plastic sliding bearings 06 are installed in the hollow outlet area of the rotator body 01. The outer diameter of the plastic sliding bearing is equal to the hollow inner diameter, and the bearing is pressed into the hollow section.

[0049] The rotating main shaft 05 cooperates with the plastic sliding bearing 06, and the flange surface of the rotating main shaft 05 abuts against the end surface of the plastic sliding bearing 06 to realize axial positioning.

[0050] Then epoxy washer 03, ND filter 02, and epoxy washer 03 are assembled on the rotating main shaft 05 in sequence. At this time, the outer epoxy washer slightly exceeds the length of the rotating main shaft 05, and the lock disc nut 04 is tightened. The locking of the ND filter 02 is realized through the thread shear force, the pressure of the epoxy washer 03, and the friction force.

[0051] On the other side, the manual dial 07 is installed. At this time, the manual dial 07 slightly exceeds the length of the rotating main shaft 05, and the lock shaft nut 08 is tightened. The fixation of the manual dial is realized through the thread shear force and the extrusion of the manual dial 07 and the epoxy washer 03.

[0052] The locking screw 09 is screwed into the rotator body 01 to press the rotating main shaft 05 to avoid shaft rotation.

[0053] After ensuring that the lock disc nut 04 is tightened, if you want to rotate the ND filter, first loosen the locking screw 09, then loosen the lock shaft nut 08 (loosen slightly, do not need to unscrew), at this time the manual dial 07 is in active state, and the manual dial 07 is rotated to the desired angle, then the lock shaft nut 08 is tightened, and finally the 09 lock nut is tightened to realize the rotation of the ND filter once.

[0054] Although some embodiments of the present application have been described in the present application, those skilled in the art can understand that these embodiments are only shown as examples. Those skilled in the art can think of many variations, alternatives and improvements under the teaching of the present application without exceeding the scope of the present application. The appended claims are intended to limit the scope of the present application, and thus cover the methods and structures within the scope of these claims and their equivalent transformations.

Claims

1. A neutral filter rotating device, characterized by, Comprising of: A rotator body with a hollow region inside; A first sliding bearing set at the end exit position of the first end of the hollow region; A second sliding bearing set at the end exit position of the second end of the hollow region; A rotating main shaft that penetrates the hollow region, and the flange surface of the rotating main shaft contacts the end surface of the first sliding bearing to achieve axial positioning; A filter set on the rotating main shaft; and A manual dial set on the end surface of the second sliding bearing.

2. The neutral density filter rotating device of claim 1, wherein, Also comprising a positioning pin and a fixing bolt for fixing the rotator body.

3. The neutral density filter rotating device of claim 1, wherein, Also comprising a gasket set on both sides of the filter, which achieves the locking of the filter through the pressure and friction of the gasket.

4. The neutral density filter rotating device of claim 3, wherein, Also comprising a lock disc nut set at the end of the rotating main shaft for locking the filter through thread shear force.

5. The neutral density filter rotating device of claim 1, wherein, Also comprising a lock shaft nut set at the end of the second sliding bearing for locking the manual dial.

6. The neutral density filter rotating device of claim 1, wherein, Also comprising a set screw set on the rotator body for providing a fixed pressure to the rotating main shaft to avoid shaft rotation.

7. The neutral density filter rotating device of claim 1, wherein, The manual dial is marked with standard scales, with a short line every 5°, a middle line every 10°, and a long line every 30°.

8. The neutral density filter rotating device of claim 7, wherein, The manual dial is configured with a reserved hole for installing a pointing structure, which is configured to reflect the degree of each rotation.

9. The neutral density filter rotating device of claim 3, wherein, The gasket is an epoxy gasket for protecting the filter from direct contact with metal and improving the thermal compensation performance of the device, and protecting the filter when thermal strain occurs at variable temperature.

10. The neutral density filter rotating device of claim 1, wherein, The sliding bearing is made of plastic.

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