CN216772162U

CN216772162U - Multifunctional filter

Info

Publication number: CN216772162U
Application number: CN202220376614.XU
Authority: CN
Inventors: 张吉坤
Original assignee: Ningbo Haida Photo Supplies Co ltd
Current assignee: Ningbo Haida Photo Supplies Co ltd; Zhang Jikun
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-06-17
Anticipated expiration: 2032-02-24

Abstract

The utility model discloses a multifunctional filter, which belongs to the technical field of filters and comprises a lens connecting ring, a first polarizer and a second polarizer; the lens connecting ring is provided with a first installation part for the first polarizer to be connected in a rotating way, and a first damping object is arranged at the first installation part; the first polarizer is provided with a second mounting part for the second polarizer to be connected in a rotating way, and a second damping object with a damping coefficient smaller than that of the first damping object is arranged at the second mounting part; the first polarizer is provided with a first rotating part for rotating the first polarizer, and the second polarizer is provided with a second rotating part for rotating the second polarizer; the multifunctional filter has two functional modes of an adjustable ND mirror mode and a combined mode of the ND mirror and the CPL mirror, and can be quickly switched between the two modes by rotating different polarizers so as to adapt to the switching of fast rhythm during photographing.

Description

Multifunctional filter

Technical Field

The utility model relates to the technical field of filters, in particular to a multifunctional filter.

Background

CPL and ND mirrors are commonly used filters on single lens reflex cameras. The CPL is named as a circular polarizer, is an annular polarizer, has a polarizing function, is mainly used for eliminating useless reflected light on a non-metal surface, such as reflected light on a water surface, and can eliminate polarized light just when the CPL is identical to the vibration angle of the polarized light on the water surface by rotating the angle of the CPL, so that the charm effect of a clear bottom is obtained. The ND mirror is named as a dimming mirror, also called as a medium grey density mirror, a neutral grey level mirror or a gray level mirror, has the function of reducing the light quantity, and is mainly used for reducing the exposure, for example, when the ND mirror is used for outdoor shooting with strong sunlight or needs longer exposure time under normal light conditions, the ND mirror is mainly divided into two ND mirrors with the gray levels being not adjustable and the gray levels being adjustable.

At present, CPL circular polarizers on the market do not have the function of dimming, so that the CPL circular polarizers cannot meet special occasions needing polarization and reducing the exposure. Although the adjustable ND mirror is formed by overlapping two polarized lenses and has a polarization effect, the two polarized lenses in the adjustable ND mirror can only rotate relatively and cannot rotate integrally, so that the angle of the ND mirror cannot be adjusted according to the polarized light vibration angle of an object, and the polarization cannot be controlled. The utility model discloses a filter which not only has the adjustable function of an adjustable ND (neutral density) filter, but also has the polarization function, and comprises a lens adapter ring, a first filter lens frame and a second filter lens frame, wherein an annular polarizer is arranged in the first filter lens frame, a linear polarizer is arranged in the second filter lens frame, the first filter lens frame is rotationally connected to the lens adapter ring, the second filter lens frame is rotationally connected to the first filter lens frame, and an adjusting button is arranged on the second filter lens frame; through outer not hard up adjusting button that revolves, alright make first filter picture frame and second filter picture frame both relative rotations, change the grey scale of dimming mirror, through screwing up the adjusting button back in the internal rotation again to rotatory camera lens adapter ring, alright make two picture frame synchronous rotations, just can eliminate the polarized light with polarized light vibrations angle is the same when rotatory angle. However, in the above patent, since the gray scale of the dimming mirror is adjusted each time, the adjusting button needs to be unscrewed first and then screwed down, the steps are very complicated, and the adjusting button is not suitable for the rhythm that the gray scale needs to be adjusted at any time in the actual photographing process, and the adjusting button is repeatedly loosened and tightly pushed against the second filter mirror frame, so that the second filter mirror frame is easily deformed, and then the polarization lens therein is deformed, and the lens in the lens is an extremely high-precision substance, even if the lens is slightly deformed, the final imaging can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides a multifunctional filter which mainly comprises a lens connecting ring, a first polarizer and a second polarizer, can be quickly switched between two modes of an adjustable ND (neutral density) mirror mode and an ND mirror and CPL (complex programmable logic) mirror combination mode, has simple switching and adjusting steps, can adapt to quick-rhythm switching, does not damage lenses in the first polarizer and the second polarizer, and ensures the service life of the filter.

In order to achieve the purpose, the utility model provides the following scheme: the utility model discloses a multifunctional filter, which comprises a lens connecting ring, a first polarizer and a second polarizer, wherein the lens connecting ring is arranged on the lens;

the lens connecting ring is provided with a first mounting part for the first polarizer to be rotatably connected, and a first damping object is arranged at the first mounting part;

the first polarizer is provided with a second mounting part for the second polarizer to be rotatably connected, and a second damping object with a damping coefficient smaller than that of the first damping object is arranged at the second mounting part;

the first polarizer is provided with a first rotating part used for rotating the first polarizer, and the second polarizer is provided with a second rotating part used for rotating the second polarizer.

Preferably, the first polarizer comprises a first filter frame with a first polarizer arranged therein, and a first annular protrusion is arranged on the outer wall of the first filter frame; the first mounting part comprises a first annular groove arranged on the inner wall of the lens connecting ring, the first annular bulge is rotatably connected in the first annular groove, and the first damper is arranged between the first annular groove and the first annular bulge.

Preferably, the first rotating part includes an anti-slip pattern provided on an end of the first filter frame remote from the lens connection ring.

Preferably, the second polarizer comprises a second filter frame with a second polarizer therein, and a second annular bulge is arranged on the outer wall of the second filter frame; the second installation department is including setting up second annular groove on the inner wall of first filter picture frame, the protruding rotation of second annular is connected in the second annular groove, the second damping thing sets up the second annular groove with between the second annular is protruding.

Preferably, the second rotating part comprises an adjusting deflector rod arranged on the outer wall of the second filter frame, and the outer wall of the first filter frame is provided with a limiting adjusting opening for extending the adjusting deflector rod.

Preferably, the outer wall of the second filter frame is provided with a threaded hole, and the end of the adjusting deflector rod is a threaded head matched with the threaded hole.

Preferably, the aperture of the polarizing lens in the second filter frame is larger than the aperture of the polarizing lens in the first filter frame.

Preferably, the first damper and the second damper are both damping oil.

Preferably, the outer wall of the lens connecting ring is provided with an external thread for matching with the internal thread of the lens.

Preferably, an anti-slip knurled groove is arranged on the outer wall outside the lens connecting ring.

Compared with the prior art, the utility model has the following technical effects:

1. the multifunctional filter mainly comprises a lens connecting ring, a first polarizer and a second polarizer, and different damping substances with different damping coefficients are filled among the lens connecting ring, the first polarizer and the second polarizer, so that the multifunctional filter has two different filter modes, namely an adjustable ND (neutral density) filter mode, an adjustable ND filter and a CPL (complex programmable logic) filter combined mode; and the switching between the two modes can be realized only by rotating different polarizers, no matter the switching is carried out, the adjusting steps are simple, if the ND mirror mode is required to be adjusted, because the multifunctional filter consists of the first polarizer and the second polarizer, the multifunctional filter has the light reduction effect of the ND mirror, when the multifunctional filter is arranged on a lens through a lens connecting ring, the photographing effect of the ordinary ND mirror can be obtained by photographing, and when the gray scale is required to be adjusted, only the second rotating part needs to be rotated, because the damping coefficient of the first damping object is larger than that of the second damping object, the frictional resistance between the first polarizer and the lens connecting ring is larger than that between the first polarizer and the second polarizer, so that the first polarizer does not need to rotate along with the second polarizer, and the two polarizers can relatively rotate, thereby achieving the purpose of adjusting the gray scale, the ND mirror is adjustable; when the mode is required to be switched to the mode combining the adjustable ND mirror and the CPL mirror, the first rotating part is only required to be rotated, the first polarizer and the second polarizer can rotate together under the frictional resistance of the second damping object, then the reflected light of the object can be selectively eliminated, a clear picture can be shot, and the mode combining the ND mirror and the CPL mirror is realized.

2. According to the utility model, the relative rotation and synchronous rotation among the first polarizer, the second polarizer and the lens connecting ring depend on damping objects with different friction coefficients, the traditional mode of locking and unlocking the first polarizer and the second polarizer by screws is cancelled, and the mechanical locking mode is avoided as much as possible, so that the problems of deformation, low precision and the like of the lens caused by extruding the polarizers and the like are avoided.

3. The aperture of the polarizing lens in the second filter lens frame is larger than that of the polarizing lens in the first filter lens frame, so that the filter lens is free of dark angle and more suitable for wide-angle lenses.

4. The first and second dampers are damping oil, and the damping oil is adopted by the dampers, so that frictional resistance can be generated among the first polarizer, the second polarizer and the lens connecting ring, and the damping oil can play a role in sealing, waterproofing, buffering and reducing abrasion among the first polarizer, the second polarizer and the lens connecting ring.

5. According to the utility model, the adjusting deflector rod is arranged on the outer wall of the second polarizer frame, and the limiting adjusting port for the extending of the adjusting deflector rod is arranged on the outer wall of the first polarizer, so that the second polarizer and the first polarizer can rotate relatively within a limited angle in the process of adjusting the ND gear, and thus, the appearance of optical cross shadows outside the ND gear is avoided, and the imaging quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic perspective view of a multifunctional filter;

FIG. 2 is a front view of the multifunctional filter;

FIG. 3 is an exploded view of the multifunctional filter;

FIG. 4 is a cross-sectional view of the multifunctional filter;

FIG. 5 is a perspective view of a lens connection ring;

FIG. 6 is a front view of a lens attachment ring;

fig. 7 is a perspective view of the first filter frame;

fig. 8 is a front view of the first filter frame;

fig. 9 is a perspective view of a second filter frame;

fig. 10 is a front view of a second filter frame;

FIG. 11 is a perspective view of a first clamping ring;

fig. 12 is a perspective view of the second pressing ring.

Description of reference numerals: 1. a lens connection ring; 2. a first filter frame; 3. a second filter frame; 4. a first polarizing lens; 5. a second polarizing lens; 6. a first clamping ring; 7. a second clamping ring; 8. a first annular projection; 9. a first annular groove; 10. anti-skid patterns; 11. a second annular projection; 12. a second annular groove; 13. adjusting a deflector rod; 14. a limiting adjusting port; 15. an external thread; 16. anti-skid knurled groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment discloses a multifunctional filter, as shown in fig. 1 to 12, comprising a lens connecting ring 1, a first polarizer and a second polarizer; the lens connecting ring 1 is provided with a first mounting part, the first polarizer is rotatably connected to the first mounting part, and a first damping object is arranged at the first mounting part, so that frictional resistance is generated between the first polarizer and the first mounting part; the first polarizer is provided with a second mounting part, the second polarizer is rotatably connected to the second mounting part, and a second damping object is arranged at the second mounting part, so that frictional resistance is generated between the second polarizer and the second mounting part, but the damping coefficient of the second damping object is smaller than that of the first damping object, and the frictional resistance between the second polarizer and the first polarizer is smaller than that between the first polarizer and the lens connecting ring 1; the first polarizer is provided with a first rotating part for rotating the first polarizer, and the second polarizer is provided with a second rotating part for rotating the second polarizer. This multifunctional filter has two kinds of camera lens modes: adjustable ND mirror mode, adjustable ND mirror and CPL mirror combination mode.

Tunable ND mirror mode: because this multi-functional filter comprises two polarization lens, this multi-functional filter itself just has the effect of ordinary ND camera lens. After the multifunctional filter is installed on the single lens reflex through the lens connecting ring 1, the shot film has the film forming effect of installing the common ND lens. When the gray scale needs to be adjusted, the second rotating part is rotated in the forward direction or the reverse direction to drive the second polarizer to rotate forwards or reversely together, and because the damping coefficient of the first damping object is larger than that of the second damping object, the first polarizer cannot rotate together with the second polarizer, but only the second polarizer rotates, at the moment, the second polarizer and the first polarizer can rotate relatively, so that the gray scale can be changed, and the adjustable mode of the ND polarizer is realized.

Tunable ND mirror and CPL mirror combination mode: after the multifunctional filter is installed on the single lens reflex through the lens connecting ring 1, the multifunctional filter has the effect of an ND lens. Want on ND mirror effect this moment, still have the effect of CPL mirror, only need forward or reverse rotation first rotation portion, first polarizer just can follow first rotation portion corotation or reversal together, then under the effect of first damping thing, have frictional resistance between second polarizer and the first polarizer, can drive the second polarizer and rotate together, thereby make first polarizer and second polarizer rotate in step, when the angle through first polarizer and second polarizer just with the polarized light vibrations angle of object the same, can eliminate polarized light, thereby obtain the effect that ND mirror and CPL mirror combine.

In this embodiment, as shown in fig. 1 to 12, the first polarizer includes a first filter frame 2, and the first filter frame 2 incorporates a first polarizing plate. The first annular bulge 8 protrudes from the outer wall of the first filter frame 2, the first mounting part comprises a first annular groove 9 arranged on the inner wall of the lens connecting ring 1, the first annular bulge 8 is clamped into the first annular groove 9, the first filter frame 2 is rotatably connected to the lens connecting ring 1, preferably, after the first annular bulge 8 is clamped into the first annular groove 9, an inclined plane is arranged on the outer side surface of the first annular bulge 8 and the inner side surface of the first annular groove 9. First damping thing setting is located between first annular groove 9 and the first annular bulge 8 in first annular groove 9, can make and have sufficient frictional resistance between first annular groove 9 and the first annular bulge 8, can drive second filter picture frame 3 and rotate together when making first filter picture frame 2 rotate.

Further, in this embodiment, as shown in fig. 1 to 12, the first filter frame 2 is integrally formed by a large-diameter circular ring and a small-diameter circular ring, the first annular protrusion 8 is located at an end of the large-diameter circular ring close to the small-diameter circular ring, an annular boss protrudes from an end of the small-diameter circular ring close to the large-diameter circular ring, and the first polarizer is pressed at the annular boss by the first pressing ring 6.

In this embodiment, as shown in fig. 1 to 12, the first rotating part includes an anti-slip pattern 10 disposed on the first filter frame 2 at an end far from the lens connection ring 1, and the anti-slip pattern 10 can increase friction force with a human hand, so that when the human hand holds the first filter frame 2 to rotate, no slipping occurs. Of course, the anti-slip pattern 10 is not limited to this form, and any structure capable of avoiding slipping may be used, for example, a plurality of shifting pieces are protruded on the outer wall of the first filter frame 2 or a layer of anti-slip rubber layer is adhered on the outer wall, and the anti-slip pattern 10 may be replaced.

In this embodiment, as shown in fig. 1 to 12, the second polarizer includes a second filter frame 3, and a second polarizer 5 is built in the second filter frame 3. Be equipped with the protruding 11 of second annular on the outer wall end of second filter picture frame 3, the second installation department is including setting up second annular groove 12 on the inner wall of first filter picture frame 2, and second annular groove 12 is close to first polaroid but has certain distance, after second annular protruding 11 cards go into second annular groove 12, has just realized that second filter picture frame 3 and first filter picture frame 2's rotation is connected, and first polarizer is located between second polarizer and the camera lens go-between 1 this moment. The second damping material is arranged in the second annular groove 12 and is positioned between the second annular groove 12 and the second annular bulge 11, so that a certain frictional resistance is arranged between the second annular groove 12 and the second annular bulge 11, but the frictional resistance is smaller than that between the first annular groove 9 and the first annular bulge 8, and therefore when the second filter frame 3 is rotated, the first filter frame 2 cannot rotate along with the second filter frame 3, and relative rotation is generated.

Further, in this embodiment, as shown in fig. 1 to 12, the second filter frame 3 is integrally a circular ring structure, an annular boss protrudes from an end of the circular ring structure, and the second polarizer 5 is pressed on the annular boss in the second filter frame 3 by the second pressing ring 7.

In this embodiment, as shown in fig. 1 to 12, the second rotating portion includes an adjusting lever 13 disposed on the outer wall of the second filter frame 3, a limiting adjustment opening 14 is disposed on the outer wall of the first filter frame 2, the adjusting lever 13 extends out of the limiting adjustment opening 14, and the adjusting lever 13 is adjusted through fluctuation, so that the second filter frame 3 can rotate, and meanwhile, under the effect of the limiting adjustment opening 14, the rotating angle of the second filter frame 3 can be limited, so that in the process of adjusting the ND gear (i.e., adjusting the gray scale), the second polarizer (the second filter frame 3) and the first polarizer (the first filter frame 2) can rotate relatively within the limited angle, thereby avoiding the occurrence of the optical cross shadow outside the ND gear, and improving the imaging quality.

Further, in order to facilitate the installation of first filter frame 2 and second filter frame 3, in this embodiment, as shown in fig. 1 to 12, be equipped with the screw hole on the outer wall of second filter frame 3, the end of adjusting driving lever 13 is the screw thread head, the screw thread head of adjusting driving lever 13 can pass spacing adjusting interface and threaded connection in the screw hole, realize adjusting driving lever 13 and the connection dismantled of second filter frame 3, from not influencing second filter frame 3 and installing in first filter frame 2, and pull down second filter frame 3 from first filter frame 2.

In this embodiment, as shown in fig. 1 to 12, the aperture of the second polarizer 5 is larger than the aperture of the polarizer in the first polarizer 4, so that the multifunctional filter is more suitable for a wide-angle lens and has no dark angle. The principle of no hidden angle: because the camera is when imaging, the size of the scenery of shooing is the size that is greater than camera light sensing element far away, so light is by the vast towards the entering into camera lens anterior segment that is leak form for a short time, when the stack multilayer filter of camera lens anterior segment (first polarized lens piece 4 and second polarized lens piece 5), first filter frame 2 shelters from the route of light very easily, form the vignetting that shelters from, consequently the bore of first polarized lens piece 4 increases, first filter frame 2 just can avoid the light path, thereby can not shelter from light, just can not produce the vignetting.

In this embodiment, the first damper and the second damper are damping oil, the damping oil as the first damper is filled in the first annular groove 9, the damping oil as the second damper is filled in the second annular groove 12, and the viscosity of the damping oil as the first damper is greater than that of the damping oil as the second damper, so that the damping coefficient of the damping oil as the first damper is greater than that of the damping oil as the second damper.

In this embodiment, as shown in fig. 1 to 12, an external thread 15 is provided on an outer side wall of the lens connection ring 1 for matching with an internal thread of the lens.

Further, in the present embodiment, as shown in fig. 1 to 12, an anti-slip knurled groove 16 is provided on an outer side wall of the lens connection ring 1, so that when the lens connection ring 1 is screwed into the single lens reflex camera lens, a friction force with a hand is increased, and slipping is avoided. Of course, the shape of the anti-slip knurled groove 16 is not limited, and other shapes such as anti-slip vertical stripes, or rubber anti-slip layer may be used as long as the anti-slip effect is achieved.

In this embodiment, the first polarizer 4 may be a circular polarizer or a linear polarizer, and the second polarizer 5 may be a circular polarizer or a linear polarizer.

The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.

Claims

1. A multifunctional filter is characterized by comprising a lens connecting ring, a first polarizer and a second polarizer;

2. The multifunctional filter according to claim 1, wherein the first polarizer comprises a first filter frame with a first polarizer disposed therein, and a first annular protrusion is disposed on an outer wall of the first filter frame; the first mounting part comprises a first annular groove arranged on the inner wall of the lens connecting ring, the first annular bulge is rotatably connected in the first annular groove, and the first damper is arranged between the first annular groove and the first annular bulge.

3. The multifunctional filter according to claim 2, wherein the first rotation part includes an anti-slip pattern provided on an end of the first filter frame remote from the lens attachment ring.

4. The multifunctional filter according to claim 2, wherein the second polarizer comprises a second filter frame with a second polarizer embedded therein, and a second annular protrusion is disposed on an outer wall of the second filter frame; the second installation department is including setting up second annular groove on the inner wall of first filter picture frame, the protruding rotation of second annular is connected in the second annular groove, the second damping thing sets up the second annular groove with between the second annular is protruding.

5. The multifunctional filter according to claim 4, wherein the second rotating portion comprises an adjusting lever disposed on an outer wall of the second filter frame, and a position-limiting adjusting opening for extending the adjusting lever is disposed on an outer wall of the first filter frame.

6. The multifunctional filter according to claim 5, wherein the outer wall of the second filter frame is provided with a threaded hole, and the end of the adjusting deflector rod is a threaded head matched with the threaded hole.

7. The multifunctional filter according to claim 4, wherein the aperture of the polarizing lens in the second filter frame is larger than the aperture of the polarizing lens in the first filter frame.

8. The multifunctional filter of claim 4 wherein said first and second dampers are damping oil.

9. The multifunctional filter according to claim 1, wherein the outer wall of the lens attachment ring is provided with an external thread for engaging with the internal thread of the lens.

10. The multifunctional filter according to claim 9, wherein the outer wall of the lens connection ring is provided with an anti-slip knurled groove.