Lens mount and narrowband filter

Abstract

The utility model belongs to the technical field of lens seats, and discloses a lens seat and a narrowband filter, the lens seat comprises a square tube, a mounting plate, a mounting hole, a first annular groove and a sealing ring, the top of the square tube is provided with a connecting plate with a middle opening, the connecting plate is provided with a placing ring at the opening, the placing ring is provided with the narrowband filter, the connecting plate is provided with a mounting tube, and the mounting tube is provided with a second annular groove. The inner wall of the upper portion of the installation pipe is provided with internal threads, the installation pipe is spirally provided with an external thread pipe through the internal threads, a polarization filter is arranged in the external thread pipe, the top of the external thread pipe is provided with a control ring, the outer diameter of the control ring is consistent with the outer diameter of the installation pipe, and the bottom face of the control ring is provided with an annular rubber sheet. The sealing ring is contacted with the circuit board, so that the bottom of the square tube is sealed with the circuit board. And the control ring, the annular rubber sheet and the polarization filter act together, so that the top of the mounting pipe is sealed. The narrow-band optical filter is located in the sealed space, moisture in external air cannot enter the space, and the imaging effect of the lens is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to narrowband optical filter technical field, especially a lens seat and narrowband optical filter. BACKGROUND

[0002] Narrowband optical filter is subdivided from band-pass filter, and its definition is same with band-pass filter, that is, the filter allows optical signal to pass in a particular wave band, and the optical signal deviating from the two sides of the wave band is prevented, and the passband of narrowband optical filter is relatively narrow, and is generally below 5% of the central wavelength value. In the field of skin detection, narrowband optical filter is arranged in front of the lens, and selective extraction of skin reflectance spectrum signal and effective suppression of interference light can be realized, so that accurate analysis of skin structure, composition and pathological changes can be realized.

[0003] At present, when the existing narrowband optical filter is installed, the lens front side is usually installed through the conventional mounting seat, however, when the moisture in the external air is relatively high, the moisture is easy to enter between the lens and the narrowband optical filter from the gap on the mounting seat. When the temperature difference between the inside and outside of the environment where the imaging lens is located is too large, the inner surface of the narrowband optical filter will produce moisture such as fog or frost, thereby affecting the transparency of the narrowband optical filter, and leading to unclear imaging of the lens. UTILITY MODEL CONTENT

[0004] In order to solve the above problems, the utility model provides a lens seat and narrowband optical filter.

[0005] The above technical purpose of the utility model is realized through the following technical scheme: a lens seat, comprising a square tube, a plurality of mounting plates are arranged on the outer wall of the square tube, mounting holes are arranged on the mounting plates, a first annular groove is arranged at the bottom of the square tube, a sealing ring is arranged in the first annular groove, a connecting plate with an opening in the middle is arranged at the top of the square tube, a placing ring is arranged at the opening of the connecting plate, a narrowband optical filter is arranged on the placing ring, an installation tube is arranged on the connecting plate, an internal thread is arranged on the inner wall of the upper part of the installation tube, an external thread tube is arranged on the installation tube through the internal thread, a polarizing filter is arranged in the external thread tube, a control ring is arranged at the top of the external thread tube, the outer diameter of the control ring is consistent with the outer diameter of the installation tube, and an annular rubber sheet is arranged on the bottom surface of the control ring.

[0006] By adopting the technical scheme, the square tube, the sealing ring, the placing ring, the outer threaded tube and the control ring are arranged, the lens is mounted on the circuit board, the screw passes through the mounting hole and is connected with the nut to fix the square tube on the circuit board, the sealing ring is in contact with the circuit board to form a seal between the bottom of the square tube and the circuit board. Then, the outer threaded tube is aligned with the inner thread on the mounting tube, and then the control ring is rotated to drive the outer threaded tube to rotate, so that the outer threaded tube enters the mounting tube, the annular rubber sheet is in contact with the top of the mounting tube, and the control ring, the annular rubber sheet and the polarizing filter jointly act to form a seal at the top of the mounting tube. The narrowband filter is in the sealed space, and moisture in the external air cannot enter the space, so that the moisture in the space is prevented from adhering to the inner surface of the narrowband filter when the temperature difference is large, and the imaging effect of the lens is ensured.

[0007] Further, the second annular groove is arranged at the top of the mounting tube, the snap ring is arranged at the bottom of the control ring and corresponds to the second annular groove, and the sealing ring is arranged at the bottom of the snap ring.

[0008] By adopting the technical scheme, the second annular groove, the snap ring and the sealing ring are arranged to further improve the sealing effect between the control ring and the top of the mounting tube.

[0009] Further, the four vertical columns are arranged at the bottom of the outer threaded tube in a circumferential direction, and the elastic sheet is arranged at the bottom of the vertical column.

[0010] By adopting the technical scheme, the vertical column and the elastic sheet are arranged, after the outer threaded tube is mounted into the mounting tube, the lower end of the elastic sheet is in contact with the top surface of the narrowband filter and provides a downward pressure to the lens, so that the narrowband filter is stably mounted on the placing ring.

[0011] Further, the plastic sheet is horizontally arranged at the lower end of the elastic sheet.

[0012] By adopting the technical scheme, the plastic sheet is horizontally arranged at the lower end of the elastic sheet, the plastic sheet is in contact with the top surface of the narrowband filter, and the elastic sheet is prevented from directly contacting the narrowband filter to scratch the lens.

[0013] Further, the elastic sheet is arranged in an inclined manner, the upper end of the elastic sheet is connected with the lower end of the vertical column, and the height of the front end of the elastic sheet along the rotation direction of the outer threaded tube is higher than the height of the rear end.

[0014] Further, the four mounting columns are arranged at the top of the control ring in a circumferential direction, the light-blocking cotton ring is arranged on the four mounting columns, the four through holes are arranged on the light-blocking cotton ring, and the through holes are in interference fit with the mounting columns.

[0015] By adopting the technical scheme, the mounting column and the light-blocking cotton ring are arranged, and the light-blocking cotton ring can effectively block the side stray light and reduce the interference of the stray light on the imaging picture of the lens.

[0016] The application further discloses a narrow-band filter, which comprises a narrow-band filter body and an ITO film arranged on the narrow-band filter body.

[0017] In summary, the utility model has the advantages of the following:

[0018] 1、In the application, square tube, sealing ring, placement ring, outer threaded tube, control ring are arranged, lens is installed on circuit board, screw passes through mounting hole, circuit board is connected with nut, square tube is fixed on circuit board, sealing ring contacts circuit board, so that the bottom of square tube and circuit board form seal. Then align outer threaded tube with internal thread on mounting pipe, then rotate control ring and drive outer threaded tube to rotate, so that outer threaded tube enters mounting pipe, annular rubber sheet contacts mounting pipe top, control ring, annular rubber sheet, polarizing filter jointly act, so that mounting pipe top forms seal. Narrow-band filter is in sealed space, moisture in external air cannot enter the space, avoid moisture in the space from adhering to the inner surface of narrow-band filter when temperature difference is large, guarantee the imaging effect of lens;

[0019] 2、In the application, second annular groove, snap ring, sealing ring are arranged, further improve the sealing effect between control ring and mounting pipe top;

[0020] 3、In the application, stand, elastic sheet are arranged, after outer threaded tube is installed into mounting pipe, elastic sheet lower end contacts narrow-band filter top surface and provides downward pressure to narrow-band filter, guarantee that narrow-band filter is stably installed on placement ring. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic diagram of the embodiment of the utility model;

[0022] Figure 2 It is the structure schematic diagram of square tube of the embodiment of the utility model;

[0023] Figure 3 It is the structure schematic diagram of another angle of square tube of the embodiment of the utility model;

[0024] Figure 4 It is the internal structure schematic diagram of mounting pipe of the embodiment of the utility model;

[0025] Figure 5 It is the structure schematic diagram of outer threaded tube, light shielding cotton ring of the embodiment of the utility model;

[0026] Figure 6 It is Figure 5 The sectional view of

[0027] Figure 7 It is Figure 6 The enlarged view of A of

[0028] Figure 8 is a structural schematic diagram of a narrow-band optical filter according to an embodiment of the present application.

[0029] In the figure: 10, square tube; 11, mounting plate; 12, mounting hole; 13, first annular groove; 14, sealing ring; 20, connecting plate; 21, placing ring; 22, mounting tube; 23, internal thread; 24, second annular groove; 30, external threaded tube; 31, polarizing filter; 32, control ring; 33, annular rubber sheet; 34, snap ring; 35, sealing ring; 40, stand; 41, elastic sheet; 42, plastic sheet; 50, mounting column; 51, light-blocking cotton ring; 52, through hole; 60, narrow-band optical filter; 61, narrow-band optical filter body; 62, ITO film. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative labor on the basis of the embodiments in the present application shall fall within the scope of protection of the present application.

[0031] As Figures 1-7As shown, the embodiment of the application discloses a lens seat, which comprises a square tube 10, a sealing ring 14, a placing ring 21 and a control ring 32. A plurality of mounting plates 11 are arranged on the outer wall of the square tube 10, mounting holes 12 are formed in the mounting plates 11, a first annular groove 13 is formed in the bottom of the square tube 10, the sealing ring 14 is arranged in the first annular groove 13, a lens is mounted on a circuit board, a screw passes through the mounting hole 12, the circuit board is connected with a nut, and the square tube 10 is fixed on the circuit board, the sealing ring 14 is in contact with the circuit board, so that the bottom of the square tube 10 and the circuit board are sealed. A connecting plate 20 with a middle opening is arranged at the top of the square tube 10, the placing ring 21 is arranged on the connecting plate 20 and located at the opening, a narrow-band filter 60 is arranged on the placing ring 21, a mounting pipe 22 is arranged on the connecting plate 20, an inner thread 23 is formed in the inner wall of the upper portion of the mounting pipe 22, an outer thread pipe 30 is arranged on the mounting pipe 22 in a screwing mode through the inner thread 23, a polarizing filter 31 is arranged in the outer thread pipe 30, the control ring 32 is arranged at the top of the outer thread pipe 30, the outer diameter of the control ring 32 is consistent with the outer diameter of the mounting pipe 22, an annular rubber sheet 33 is arranged on the bottom surface of the control ring 32, then the outer thread pipe 30 is aligned with the inner thread 23 on the mounting pipe 22, then the control ring 32 is rotated to drive the outer thread pipe 30 to rotate, so that the outer thread pipe 30 enters the mounting pipe 22, the annular rubber sheet 33 is in contact with the top of the mounting pipe 22, and the control ring 32, the annular rubber sheet 33 and the polarizing filter 31 jointly act to seal the top of the mounting pipe 22. The narrow-band filter 60 is located in a sealed space, moisture in the external air cannot enter the space, and the moisture in the space is prevented from adhering to the inner surface of the narrow-band filter 60 when the temperature difference is large, so that the imaging effect of the lens is ensured.

[0032] A second annular groove 24 is formed in the top of the mounting pipe 22, a clamping ring 34 is arranged at the bottom of the control ring 32 and corresponds to the second annular groove 24, a sealing ring 35 is arranged at the bottom of the clamping ring 34, after the outer thread pipe 30 enters the mounting pipe 22, the clamping ring 34 enters the second annular groove 24, and the sealing ring 35 is in contact with the groove bottom of the second annular groove 24. Specifically, the annular rubber sheet 33 has two, one of which is located at the bottom of the control ring 32 on the inner side of the clamping ring 34, and the other is located at the bottom of the control ring 32 on the outer side of the clamping ring 34, so that the sealing effect between the control ring 32 and the top of the mounting pipe 22 is improved. The sealing ring 35 and the sealing ring 14 are both made of rubber.

[0033] During installation, to ensure the narrowband filter 60 is stably mounted on the mounting ring 21, four posts 40 are circumferentially spaced at the bottom of the externally threaded tube 30. Each post 40 has an elastic sheet 41 at its bottom. After the externally threaded tube 30 is installed into the mounting tube 22, the lower end of the elastic sheet 41 contacts the top surface of the narrowband filter 60, providing downward pressure to the lens and ensuring the narrowband filter 60 is stably mounted on the mounting ring 21. A plastic sheet 42 is horizontally positioned at the lower end of the elastic sheet 41, contacting the top surface of the narrowband filter 60 to prevent direct contact and scratching of the lens. The elastic sheet 41 is made of copper, and the plastic sheet 42 is made of polytetrafluoroethylene (PTFE). The elastic sheet 41 is arranged at an angle, with its upper end connected to the lower end of the post 40. When the elastic sheet 41 is installed along the externally threaded tube 30, the front end of the elastic sheet 41 is higher than the rear end in the direction of rotation.

[0034] In specific setup, four mounting posts 50 are spaced circumferentially at the top of the control ring 32. Each of the four mounting posts 50 shares a light-blocking cotton ring 51. The light-blocking cotton ring 51 has four through holes 52, which are interference-fitted with the mounting posts 50. The light-blocking cotton ring 51 effectively blocks stray light from the sides, reducing its interference with the lens image. During installation, simply align the through holes 52 with the corresponding mounting posts 50, and then press the light-blocking cotton ring 51 to install it onto the mounting posts 50.

[0035] like Figure 8 As shown in the illustration, this application also discloses a narrowband filter 60, which includes a narrowband filter body 61 and an ITO film 62 disposed on the narrowband filter body 61. The narrowband filter 60 is located between the placement ring 21 and the plastic sheet 42. The narrowband filter 60 allows light signals to pass through in a specific wavelength band, while blocking light signals deviating from this wavelength band. The ITO film 62 has high visible light transmittance, high mechanical hardness, and good chemical stability, reducing the reflection and scattering of light on the surface of the narrowband filter body 61, thereby improving image clarity and contrast.

[0036] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A lens mount, characterized by: The application relates to a square tube (10) provided with a plurality of mounting plates (11) on the outer wall, mounting holes (12) are formed in the mounting plates (11), a first annular groove (13) is formed in the bottom of the square tube (10), a sealing ring (14) is arranged in the first annular groove (13), a connecting plate (20) with an opening in the middle is arranged on the top of the square tube (10), a placing ring (21) is arranged on the connecting plate (20) at the opening, a narrow-band filter (60) is arranged on the placing ring (21), a mounting tube (22) is arranged on the connecting plate (20), internal threads (23) are formed in the upper inner wall of the mounting tube (22), an external thread tube (30) is arranged on the mounting tube (22) through the internal threads (23), a polarization filter (31) is arranged in the external thread tube (30), a control ring (32) is arranged on the top of the external thread tube (30), the outer diameter of the control ring (32) is consistent with the outer diameter of the mounting tube (22), and an annular rubber sheet (33) is arranged on the bottom surface of the control ring (32).

2. A lens mount according to claim 1, characterized in that: A second annular groove (24) is formed in the top of the mounting tube (22), a snap ring (34) is arranged on the bottom of the control ring (32) and corresponds to the second annular groove (24), and a sealing ring (35) is arranged on the bottom of the snap ring (34).

3. The lens holder of claim 1, wherein: Four stand columns (40) are circumferentially and interval arranged on the bottom of the external thread tube (30), and elastic sheets (41) are arranged on the bottom of the stand columns (40).

4. A lens mount according to claim 3, characterized in that: Plastic sheets (42) are horizontally arranged on the lower ends of the elastic sheets (41).

5. The lens holder of claim 3, wherein: The elastic sheets (41) are arranged in an inclined mode, the upper ends of the elastic sheets (41) are connected with the lower ends of the stand columns (40), and the height of the front end of the elastic sheets (41) in the rotating direction is higher than the height of the rear end when the elastic sheets (41) are installed along the external thread tube (30).

6. The lens holder of claim 1, wherein: Four mounting columns (50) are circumferentially and interval arranged on the top of the control ring (32), and one light-blocking cotton ring (51) is arranged on the four mounting columns (50), four through holes (52) are formed in the light-blocking cotton ring (51), and the through holes (52) are in interference fit with the mounting columns (50).

7. A narrow-band optical filter characterized by: The narrow-band filter (60) comprises a narrow-band filter body (61) and an ITO film (62) arranged on the narrow-band filter body (61).

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