A low surface reflectivity lens barrel

Abstract

The utility model discloses a low surface reflectivity's lens barrel, including base, the inner wall of base is connected with sunshade, and the outer wall of base is provided with the one side away from sunshade's connecting seat, and low surface reflectivity's lens barrel still includes fixed establishment, and fixed establishment sets up between base and connecting seat. The utility model relates to optical component technical field, and this low surface reflectivity's lens barrel, through the cooperation of adjusting groove, locking block, adjusting seat, fixed ring and fixed rod, realizes the fixing of the lens of different thickness, ensures that different lenses can be installed in the lens barrel inside with stable and concentric state, neither will produce displacement shaking because of too loose, also will not cause lens stress deformation because of too tight, guarantees the strict following of preset light path in the propagation process of light, maximum degree reduces the optical interference caused by lens position deviation, and then improves the imaging definition and stability of optical system.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical component technical field, concretely is a low surface reflectivity's lens barrel. BACKGROUND

[0002] Low surface reflectivity's lens barrel is a component for optical system, aims at reducing the reflection of light in the inner surface of lens barrel, thereby improves the imaging quality of optical system.

[0003] The conventional low surface reflectivity's lens barrel when using, the manufacturer coats the matt material on the inner wall of lens barrel, these materials can absorb a part of incident light, makes the reflected light become more scattered simultaneously, thereby reduces the reflectivity.

[0004] But in actual use, may meet the situation needing to replace the lens, the thickness of different specifications and style lenses may exist difference, when installing the lens of different thickness, often difficult to realize firm and accurate fixed, for the thinner lens, possibly because fixed too loose and in the lens barrel produces the swing, makes the gap between the lens and the inner wall of lens barrel change, part gap too big area easily becomes the hideout of stray light, forces the effect of matt material absorption and scattering light to be weakened, and for the thicker lens, again possible because fixed too tight produces stress, not only easy to damage the lens, also can lead to the change of lens optical performance, finally influence the imaging quality and stability of whole optical system. SUMMARY

[0005] In view of the deficiency of prior art, the utility model provides a low surface reflectivity's lens barrel, solved in actual use, may meet the situation needing to replace the lens, the thickness of different specifications and style lenses may exist difference, when installing the lens of different thickness, often difficult to realize firm and accurate fixed, for the thinner lens, possibly because fixed too loose and in the lens barrel produces the swing, makes the gap between the lens and the inner wall of lens barrel change, part gap too big area easily becomes the hideout of stray light, forces the effect of matt material absorption and scattering light to be weakened, and for the thicker lens, again possible because fixed too tight produces stress, not only easy to damage the lens, also can lead to the change of lens optical performance, finally influence the imaging quality and stability of whole optical system.

[0006] In order to achieve the above object, the utility model discloses a low surface reflectivity's lens barrel through the following technical schemes to be realized: a low surface reflectivity's lens barrel, including base, the inner wall of base is connected with sunshade, and the outer wall of base is provided with connecting seat on the side away from sunshade, and the low surface reflectivity's lens barrel still includes fixing mechanism, and fixing mechanism is arranged between base and connecting seat, sunshade mechanism is arranged on the side away from base of sunshade outer wall, and extinction mechanism is arranged in the inside of sunshade, wherein, the lens of different thickness is fixed through fixing mechanism, the strong light is avoided directly entering the inside of lens barrel through sunshade mechanism, and the path of the reflection light entering the inside of lens barrel is changed through extinction mechanism.

[0007] Preferably, the fixing mechanism includes an adjusting groove, the adjusting groove is opened on the side of the outer wall of the base close to the connecting seat, a locking block is connected to the inner wall of the adjusting groove, an adjusting seat is fixedly connected to the outer wall of the locking block away from the adjusting groove, a fixing ring is threadedly connected to the inner wall of the adjusting seat, and a fixing rod is inserted into the inner wall of the adjusting seat and sequentially penetrates through the connecting seat, the fixing ring and the base, wherein the lenses of different thickness in the lens barrel are fixed through the adjusting groove, the locking block, the adjusting seat, the fixing ring and the fixing rod.

[0008] Preferably, the sunshade mechanism includes a sunshade board, the sunshade board is rotatably connected to the outer wall of the sunshade away from the base through a pin shaft, a connecting block is fixedly connected to the top of the sunshade board, a fixing block is fixedly connected to the outer wall of the connecting block, and a fixing groove is opened on the outer wall of the sunshade, wherein the sunshade board, the connecting block, the fixing block and the fixing groove cooperate to avoid the strong light indoors and outdoors directly entering the inside of the lens barrel.

[0009] Preferably, the extinction mechanism includes a first extinction groove, the first extinction groove is opened on the side of the inner wall of the base away from the sunshade, an extinction seat is fixedly connected to the inner wall of the base and is inserted into the inner wall of the sunshade, and a second extinction groove is opened on the inner wall of the extinction seat, wherein the path of the reflection light entering the inside of the lens barrel is changed through the cooperation of the first extinction groove, the extinction seat and the second extinction groove.

[0010] Preferably, the inner wall of the sunshade is provided with a sunshade groove, and the sunshade groove is sleeved on the outer wall of the extinction seat.

[0011] Preferably, a limiting groove is opened on the side of the outer wall of the connecting seat close to the adjusting seat, a limiting ring is slidably connected to the inner wall of the limiting groove, and the outer wall of the limiting ring away from the limiting groove is fixedly connected to the outer of the adjusting seat. Beneficial effects

[0012] The utility model provides a mirror barrel of low surface reflectivity. Have the following beneficial effect: this mirror barrel of low surface reflectivity, through the cooperation of adjusting groove, locking block, adjusting seat, fixed ring and fixed rod, realize the fixing of different thickness lenses, ensure that different lenses can be installed in the mirror barrel inside in stable and concentric state, neither will produce displacement shake because of too loose, also will not cause lens stress deformation because of too tight, ensure that light strictly follows preset light path in the propagation process, maximum degree reduces the optical interference caused by lens position deviation, and then improves the imaging definition and stability of optical system.

[0013] Through the cooperation of sunshade, connecting block, fixed block and fixed groove, a sunshade area is arranged at the front end of the mirror barrel, the sunshade area can effectively block strong light from directly entering the mirror barrel inside, avoid strong light from forming excessive reflection or producing glare on the lens surface, still can keep stable imaging quality under indoor and outdoor strong light environment, reduced the picture distortion risk caused by too strong light. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is the appearance schematic diagram of the utility model;

[0016] Figure 3 It is Figure 1 It is the structure schematic diagram of adjusting groove, locking block and adjusting seat in the utility model;

[0017] Figure 4 It is Figure 1 It is the structure schematic diagram of sunshade, connecting block and fixed block in the utility model.

[0018] In the drawing: 1, base; 2, sunshade; 21, sunshade groove; 3, connecting seat; 31, limit groove; 32, limit ring; 4, fixed mechanism; 41, adjusting groove; 42, locking block; 43, adjusting seat; 44, fixed ring; 45, fixed rod; 5, sunshade mechanism; 51, sunshade; 52, connecting block; 53, fixed block; 54, fixed groove; 6, light extinction mechanism; 61, first light extinction groove; 62, light extinction seat; 63, second light extinction groove. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings of the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0020] In actual use, the lens may need to be replaced, and the thickness of different specifications and styles of lenses may be different. When installing lenses of different thicknesses, it is often difficult to achieve stable and accurate fixation. For thinner lenses, the lens may shake in the lens barrel due to loose fixation, causing the gap between the lens and the inner wall of the lens barrel to change. Some areas with excessive gap are prone to become hiding places for stray light, forcing the light absorption and scattering effect of the matte material to be weakened. For thicker lenses, stress may be generated due to tight fixation, which not only easily damages the lens, but also may cause changes in the optical performance of the lens, ultimately affecting the imaging quality and stability of the entire optical system.

[0021] Therefore, the utility model provides a low surface reflectivity's lens barrel, through the cooperation of adjusting groove, locking block, adjusting seat, fixed ring and fixed rod, realize fixing to different thickness lens, ensure that different lenses can be installed in the lens barrel in stable and concentric state, neither will cause displacement shake because of too loose, also will not cause lens stress deformation because of too tight, ensure that the light strictly follow the preset light path in the propagation process, maximum reduce the optical interference caused by lens position deviation, further improve the imaging definition and stability of optical system.

[0022] Through the personnel in the art, the parts in the case are connected in turn, and the specific connection and operation sequence should be referred to the following working principle, and the detailed connection means is the public technical knowledge in the art, and the following mainly introduces the working principle and process.

[0023] Embodiment one: by Figures 1-4 It can be known that a low surface reflectivity's lens barrel, including base 1, the inner wall of base 1 is connected with light shield 2, the outer wall of base 1 is away from the side of light shield 2 and is provided with connecting seat 3, low surface reflectivity's lens barrel still includes fixing mechanism 4, sunshade mechanism 5 and light extinction mechanism 6, fixing mechanism 4 is arranged between base 1 and connecting seat 3;Sunshade mechanism 5 is arranged on the outer wall of light shield 2 away from base 1;Light extinction mechanism 6 is arranged in the inside of light shield 2;Wherein, different thickness lenses are fixed by fixing mechanism 4, strong light is avoided by sunshade mechanism 5 directly entering the inside of lens barrel, the path of reflected light entering the inside of lens barrel is changed by light extinction mechanism 6;

[0024] In the specific implementation process, it is particularly worth noting that the base 1 is generally circular ring-shaped, and its cross-section is similar to a 'convex' shape. Its material can be selected as aluminum alloy. Four circular through-holes are arranged on its side wall in a cross distribution. An annular baffle is arranged on the outer wall of the base 1 on the side away from the light-shielding cover 2, and a rubber ring is fixedly connected to the outer wall on the same side. The cross-section of the light-shielding cover 2 is similar to a trapezoid, and its material can be selected as engineering plastic. An annular protrusion is arranged on its outer wall, and this protrusion can cooperate with the internal annular groove of the base 1 to achieve fixation. During installation, directly insert the side of the light-shielding cover 2 with the annular protrusion into the inner wall of the base 1. The cross-section of the connecting seat 3 is similar to an 'I' shape, and its material is the same as that of the light-shielding cover 2. Four circular through-holes are also arranged on its side wall. The connecting seat 3 is used to connect with the optical device. In actual use, the staff can fix lenses with different thicknesses through the fixing mechanism 4, effectively avoid direct strong light from entering the inside of the lens barrel through the sunshade mechanism 5, and change the path of the reflected light entering the inside of the lens barrel through the light extinction mechanism 6;

[0025] Furthermore, the fixing mechanism 4 includes an adjustment groove 41, a locking block 42, an adjustment seat 43, a fixing ring 44 and a fixing rod 45. The adjustment groove 41 is opened on the outer wall of the base 1 near the connecting seat 3; the locking block 42 is clamped on the inner wall of the adjustment groove 41; the adjustment seat 43 is fixedly connected to the outer wall of the locking block 42 on the side away from the adjustment groove 41; the fixing ring 44 is threadedly connected to the inner wall of the adjustment seat 43; the fixing rod 45 is inserted into the inner wall of the adjustment seat 43 and sequentially penetrates through the connecting seat 3, the fixing ring 44 and the base 1; among them, lenses with different thicknesses inside the lens barrel are fixed through the adjustment groove 41, the locking block 42, the adjustment seat 43, the fixing ring 44 and the fixing rod 45;

[0026] In the implementation process, it is worth pointing out that the adjusting groove 41 is similar to a hemisphere as a whole, and is provided with a plurality of circular distributions, wherein the distance between two adjusting grooves 41 is related to the thickness of the actual lens, and can be designed according to the thickness of the actual mainstream lens, which meets the work. The locking block 42 is provided with two, which are the same as the adjusting groove 41, and the distance between the two locking blocks 42 is about the diameter of the circular adjusting groove 41. The adjusting seat 43 is similar to a circular ring as a whole, and the cross section is similar to a 'T' shape. The outer wall is provided with an anti-skid pattern, and the inner wall is processed with an internal thread. The fixed ring 44 is a circular ring as a whole, and is screwed into the inside of the adjusting seat 43. The outer wall is provided with an external thread, and the side wall is also provided with the same four through holes on the base 1 and the connecting seat 3. And the outer wall is provided with a ring-shaped rubber ring near the base 1. The fixed rod 45 is provided with four, one end of which is provided with an internal hexagonal recess, and the other end is provided with an external thread. Four fixed rods 45 are respectively inserted into the inside of four circular through holes, and sequentially penetrate the connecting seat 3, the fixed ring 44 and the base 1, which extend out of the base 1 near the light shield 2, and are fixed by the nut. The connecting seat 3, the fixed ring 44 and the base 1 are connected together. When the lens in the lens barrel needs to be replaced, first, the operator places the lens barrel on the operation table, and removes the light shield 2. At this time, the nut of the fixed rod 45 is exposed. Then, the tool is inserted into the side of the fixed rod 45 with the internal hexagonal recess, and the nut is removed counterclockwise. After the nut is removed, the fixed rod 45 is pulled out of the connecting seat 3, the fixed ring 44 and the base 1. The remaining three fixed rods 45 are the same. After the four fixed rods 45 are removed, the operator can sequentially remove the connecting seat 3 and the adjusting seat 43. The fixed ring 44 moves with the adjusting seat 43. At this time, the old lens is exposed. The operator removes the old lens and installs the new lens into the annular baffle on the side wall of the base 1, so that the side wall of the lens contacts the rubber ring. Finally, the above-mentioned action is reversed to restore each part to the initial position. Since the thickness of the new lens may be different from that of the old lens, the new lens needs to be re-fixed. Therefore, when restoring the position of each part, the base 1 needs to be kept in a flat state. The operator holds the outer wall of the base 1 with one hand, and rotates the adjusting seat 43 with the other hand. The adjusting seat 43 drives the two locking blocks 42 to move in the adjusting grooves 41. At the same time, the adjusting seat 43 drives the fixed ring 44 to move through the internal thread. The fixed ring 44 is limited by the fixed rod 45 and keeps straight line movement. The fixed ring 44 gradually approaches the outer wall of the new lens until the rubber ring on the outer wall of the fixed ring 44 tightly contacts the outer wall of the new lens. The locking block 42 is clamped to the inner wall of the adjusting groove 41. The adjustment is completed to ensure the stability of the lens and the imaging quality and stability of the entire optical system.

[0027] Further, the sunshade mechanism 5 comprises a sunshade plate 51, a connecting block 52, a fixing block 53 and a fixing groove 54, the sunshade plate 51 is rotatably connected to the outer wall of the sunshade 2 away from the base 1 by a pin shaft; the connecting block 52 is fixedly connected to the top of the sunshade plate 51; the fixing block 53 is fixedly connected to the outer wall of the connecting block 52; the fixing groove 54 is provided on the outer wall of the sunshade 2; wherein the cooperation of the sunshade plate 51, the connecting block 52, the fixing block 53 and the fixing groove 54 avoids the direct entry of strong light from indoors and outdoors into the interior of the lens barrel;

[0028] In the specific implementation process, it is particularly worth pointing out that the sunshade plate 51 is a circular plate as a whole, which can be made of engineering plastic material, the top of which is rotatably connected to the sunshade 2 by a pin shaft, and the bottom of which is provided with an oval T-shaped protrusion which can cooperate with the mounting groove below the outer wall of the sunshade 2 to fix the sunshade plate 51, the connecting block 52 is similar to an 'L' shape in cross section, and is made of the same material as the sunshade plate 51, the fixing block 53 is similar to a combination of a ball and a cylinder as a whole, and is made of the same material as the connecting block 52, and the fixing groove 54 is similar to a spherical shape in cross section, which can achieve clamping and fixing of the connecting block 52, when the lens barrel with low surface reflectivity is needed, the operator holds the outer wall of the sunshade plate 51 with his hand, and pries the sunshade plate 51 upwards with the pin shaft as the center, the sunshade plate 51 drives the connecting block 52 to move, the connecting block 52 drives the fixing block 53 to move, when the sunshade plate 51 is rotated to 90 degrees, the fixing block 53 is clamped to the inner wall of the fixing groove 54, at this time the sunshade plate 51 will not fall down, the sunshade plate 51 can avoid the direct entry of strong light into the interior of the lens barrel, avoid the formation of excessive reflection or glare on the surface of the lens, and reduce the risk of picture distortion;

[0029] Embodiment two: by Figures 1-4 It can be seen that the light extinction mechanism 6 comprises a first light extinction groove 61, a light extinction seat 62 and a second light extinction groove 63, the first light extinction groove 61 is provided on the inner wall of the base 1 away from the sunshade 2; the light extinction seat 62 is fixedly connected to the inner wall of the base 1 and is inserted into the inner wall of the sunshade 2; the second light extinction groove 63 is provided on the inner wall of the light extinction seat 62; wherein the cooperation of the first light extinction groove 61, the light extinction seat 62 and the second light extinction groove 63 changes the path of the reflected light entering the interior of the lens barrel;

[0030] In the specific implementation process, it is worth pointing out that the first light extinction groove 61 is provided with a plurality of, the whole is similar to hemispherical, the inner wall and the inner wall of the base 1 are coated with black matte paint, the light extinction seat 62 is similar to tubular as a whole, the section is similar to trapezoidal, the material is engineering plastic material, the inner wall is processed with a plurality of second light extinction grooves 63, the second light extinction groove 63 is similar to acute triangle in section, the acute triangle structure can make the reflected light incident into the groove form multiple reflections between two inclined planes, each reflection will pass through the light absorption treatment layer of the inner wall, thereby greatly improving the light absorption efficiency, can significantly reduce the surface reflectivity, the inner wall of the second light extinction groove 63 and the light extinction seat 62 is also coated with black matte paint, the light extinction effect of the low surface reflectivity lens barrel is improved;

[0031] Further, the inner wall of the light shield 2 is provided with a light shielding groove 21, and the light shielding groove 21 is sleeved on the outer wall of the light extinction seat 62;

[0032] In the specific implementation process, it is worth pointing out that the light shielding groove 21 is provided with a plurality of, the whole is similar to ring, the section is similar to triangle, the inner wall is coated with black matte paint, the light extinction effect of the low surface reflectivity lens barrel is further improved, and the surface reflectivity is reduced;

[0033] Further, the outer wall of the connecting seat 3 is provided with a limiting groove 31 near one side of the adjusting seat 43, the inner wall of the limiting groove 31 is slidably connected with a limiting ring 32, and the outer wall of the limiting ring 32 away from the limiting groove 31 is fixedly connected to the outer wall of the adjusting seat 43;

[0034] In the specific implementation process, it is worth pointing out that the limiting groove 31 is annular as a whole, the section is square, the limiting ring 32 is similar to the limiting groove 31 as a whole, and the material is the same as the adjusting seat 43; through the cooperation of the limiting groove 31 and the limiting ring 32, the movement of the adjusting seat 43 is accurately guided, the displacement of the adjusting seat 43 in the radial direction is limited, and it is ensured that the adjusting seat 43 can only smoothly slide along the axial direction of the lens barrel, so that the adjusting accuracy of the adjusting seat 43 is improved;

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A lens barrel with low surface reflectivity, comprising a base (1), characterized in that: A light shield (2) is snapped onto the inner wall of the base (1), and a connecting seat (3) is provided on the outer wall of the base (1) away from the light shield (2). The low surface reflectivity lens barrel also includes: The fixing mechanism (4) is located between the base (1) and the connecting seat (3); The shading mechanism (5) is located on the outer wall of the shading cover (2) on the side away from the base (1); The light-absorbing mechanism (6) is located inside the light-shielding cover (2); Among them, the fixing mechanism (4) fixes lenses of different thicknesses, the sunshade mechanism (5) prevents strong light from directly entering the lens barrel, and the light-reducing mechanism (6) changes the path of reflected light entering the lens barrel.

2. The low surface reflectivity lens barrel according to claim 1, characterized in that: The fixing mechanism (4) includes: An adjustment groove (41) is provided on the outer wall of the base (1) near the connecting seat (3); The locking block (42) is engaged with the inner wall of the adjusting groove (41); Adjustment seat (43) is fixedly connected to the outer wall of locking block (42) on the side away from adjustment groove (41); A retaining ring (44) is threaded to the inner wall of the adjusting seat (43); The fixing rod (45) is inserted into the inner wall of the adjusting seat (43) and passes through the connecting seat (3), the fixing ring (44) and the base (1) in sequence. The lens with different thicknesses inside the lens barrel is fixed by the adjustment groove (41), locking block (42), adjustment seat (43), fixing ring (44) and fixing rod (45).

3. The low surface reflectivity lens barrel according to claim 1, characterized in that: The sunshade mechanism (5) includes: The sunshade (51) is rotatably connected to the outer wall of the sunshade (2) away from the base (1) by a pin; Connecting block (52) is fixedly connected to the top of sunshade (51); The fixing block (53) is fixedly connected to the outer wall of the connecting block (52); A fixing groove (54) is formed on the outer wall of the light shield (2); The combination of the sunshade (51), connecting block (52), fixing block (53) and fixing groove (54) prevents strong indoor and outdoor light from directly entering the inside of the lens barrel.

4. The low surface reflectivity lens barrel according to claim 1, characterized in that: The extinction mechanism (6) includes: The first matting groove (61) is located on the inner wall of the base (1) on the side away from the light shield (2); The matte base (62) is fixedly connected to the inner wall of the base (1) and inserted into the inner wall of the light shield (2); The second matting groove (63) is formed on the inner wall of the matting base (62); The path of reflected light entering the lens barrel is changed by the cooperation of the first extinction groove (61), the extinction seat (62), and the second extinction groove (63).

5. A low surface reflectivity lens barrel according to claim 4, characterized in that: The inner wall of the light shield (2) is provided with a light shielding groove (21), and the light shielding groove (21) is fitted onto the outer wall of the light-absorbing seat (62).

6. A low surface reflectivity lens barrel according to claim 2, characterized in that: A limiting groove (31) is provided on the outer wall of the connecting seat (3) near the adjusting seat (43). A limiting ring (32) is slidably connected to the inner wall of the limiting groove (31). The outer wall of the limiting ring (32) away from the limiting groove (31) is fixedly connected to the outer wall of the adjusting seat (43).

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