A multifunctional waterproof and dustproof probe lens

Abstract

The present invention discloses a multifunctional waterproof and dustproof probe lens. The lens comprises, from the object side to the image side, an objective lens frame OBJ‑A, a middle waterproof lens frame FST, a connecting joint GJ, and a rear focus and magnification group MACRO. The rear focus and magnification group MACRO includes a focus handwheel Foc1 and an aperture handwheel AP1. The present invention is convenient and quick to use, providing a waterproof and dustproof, multifunctional, slender probe lens capable of switching between straight-on, oblique, and bent viewing angles. By switching the locking handwheel, the front lens body can be freely configured with different viewing angles, enabling shooting requirements in different environments and camera positions. The lens is easily mass-produced, low-cost, and high-performance, making it widely applicable to specialized probe macro lenses required for video cameras and still cameras.

Description

Technical Field

[0001] The present invention relates to the technical field of macro photography, and in particular to a multifunctional waterproof and dustproof probe lens. Background Art

[0002] Currently, the lenses used in traditional video cameras can only capture subjects in normal environments. It is difficult to shoot in narrow, dim environments, especially in humid and shallow water, especially to shoot tiny objects and subjects such as insects. In addition, it is difficult to achieve normal shooting in the inner cavities of caves and small objects because the lenses cannot be inserted. At the same time, traditional lenses can only capture scenes in the vertical direction of the object, and it is difficult to capture scenes at other angles.

[0003] Some probe-type lenses currently on the market are mostly straight-view, or 30-degree and 90-degree shooting modes, but the overall lens body is linear, and the camera body, or the optical axis of the camera body and lens are perpendicular. Some special angles are very inconvenient to shoot, and the position of the camera or camera needs to be adjusted, which brings a lot of inconvenience. Summary of the Invention

[0004] The main purpose of the present invention is to provide a multifunctional waterproof and dustproof probe lens, which can effectively solve the problem that the interchangeable lenses used in cameras cannot shoot subjects in narrow, humid and shallow water environments, and also overcome the problem that the probe lenses on the market cannot be turned to shoot special camera positions.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A multifunctional waterproof and dustproof probe lens, which comprises, from the object side to the image side, an objective lens frame OBJ-A, a middle waterproof lens frame FST, a connecting joint GJ and a rear focus magnification group MACRO;

[0007] Among them, the rear focus magnification group MACRO includes the focus handwheel Foc1 and the aperture handwheel AP1.

[0008] Preferably, the objective lens frame OBJ-A contains several lenses and a prism PRZ, wherein the prism PRZ can realize multiple structural changes of the prism PRZ, including a direct viewing angle without reflection, a bent viewing angle with one reflection, and an oblique viewing angle with two reflections, according to the needs of the optical system.

[0009] Preferably, a waterproof and dustproof protective glass GL is provided on the object side of the objective lens frame OBJ-A. A waterproof gasket DP and associated auxiliary components are provided between the waterproof and dustproof protective glass GL and the objective lens frame OBJ-A to achieve a front-end waterproof function. Below the waterproof and dustproof protective glass GL is a meniscus lens G1 with a negative refractive power. The thickness of the waterproof and dustproof protective glass GL is GD, and satisfies the following conditional formula (1):

[0010] 0.5mm≤GD≤4.0mm (1).

[0011] Preferably, the objective lens frame OBJ-A and the middle waterproof frame FST are connected by a thread, and waterproof glue is applied to the thread and an O-shaped waterproof ring is attached to the thread connection mechanism. The O-shaped waterproof ring is made of rubber or soft material.

[0012] Preferably, the middle waterproof frame FST has a length of FST-L, an outer diameter of FST-D0, an inner diameter of FST-D1, and satisfies conditional formulas (2), (3), and (4):

[0013] 18mm≤D0≤40mm (2);

[0014] 10mm≤D1≤35mm (3);

[0015] 100mm≤FST-L≤450mm (4).

[0016] Preferably, the middle waterproof frame FST and the rear focus magnification group MACRO are connected by a connecting joint GJ, wherein the connecting joint GJ can be equipped with a reflector in the inner cavity according to the optical path requirements, and the angle between the mirror surface of the reflector and the optical axis of the middle waterproof frame FST is ANG1, and the conditional formula (5) is satisfied:

[0017] 5°≤ANG1≤50° (5).

[0018] Preferably, the connecting joint GJ and the rear focus magnification group MACRO are connected by switching the locking hand wheel SL.

[0019] Preferably, the angle of the prism PRZ in the objective lens frame OBJ-A when realizing the primary reflection is the same as the primary mirror reflection angle in the connection joint GJ, so that the viewing angle direction is parallel to the optical axis of the rear focus magnification group MACRO, and the angle between the optical axis of the middle waterproof frame FST and the optical axis of the rear focus magnification group MACRO is ANG2, and the conditional formula (6) is satisfied:

[0020] 10°≤ANG2≤100° (6).

[0021] Preferably, when the prism PRZ in the objective lens frame OBJ-A realizes two reflections, the first reflection angle is A01, the second reflection angle is A02, and finally the optical axis of the objective lens and the optical axis of the middle waterproof frame FST are at an angle ANG3, and satisfy the conditional equations (7), (8) and (9):

[0022] 20°≤A01≤120° (7);

[0023] 40°≤A02≤150° (8);

[0024] 5°≤ANG3≤100° (9).

[0025] If the upper limit of the conditional expression 0.5mm≤GD≤4.0mm(1) is exceeded, the waterproof and dustproof protective glass GL is too thick. Although it can protect the safety of the objective lens and is not easily damaged, the wide-angle lens has a large field of view, which easily causes the lens frame to block light. If light is not blocked, the lens barrel will become very thick, making it difficult to miniaturize. If the lower limit of the conditional expression (1) is exceeded, the waterproof and dustproof protective glass GL is too thin. Although it can be miniaturized, the glass is too thin and is fragile and easily broken, making it unreliable.

[0026] If the upper limit of the conditional expression 18mm≤D0≤40mm(2) is exceeded, the middle waterproof frame FST is too thick. Although it can easily meet the structural design requirements, the overall frame volume is too large, which loses the purpose of the slender design and is difficult to miniaturize. If the lower limit of the conditional expression (2) is exceeded, the middle waterproof frame FST is too thin. Although it can easily meet the design purpose of miniaturization, it will make it difficult to realize the structural design of the mechanism inside the frame.

[0027] If the upper limit of the conditional expression 10mm≤D1≤35mm(3) is exceeded, the inner cavity of the middle waterproof frame FST is too large. Although it can easily meet the structural design requirements, the overall frame volume is too large, which loses the purpose of slender design and is difficult to miniaturize. If the lower limit of the conditional expression (3) is exceeded, the inner cavity of the middle waterproof frame FST is too small. Although it can meet the design purpose of miniaturization, it will make it difficult to realize the structural design of the mechanism inside the frame.

[0028] If the upper limit of the conditional expression 100mm≤FST-L≤450mm(4) is exceeded, the length of the middle waterproof frame FST is long enough to facilitate shooting in narrow places and the waterproof effect is also good. However, because the middle waterproof frame is too long, it is easy to interfere with the focus mechanism and aperture mechanism at the rear end. If the lower limit of the conditional expression (4) is exceeded, although it does not interfere with the focus mechanism and aperture mechanism at the rear end of the lens, the waterproof part is too short, and the lens body will not be waterproof when shooting in many environments.

[0029] If the upper limit of the conditional expression 10°≤ANG1≤50°(5) is exceeded, the angle between the mirror reflection and the middle waterproof frame FST will be greater than 50°, which means that the angle of the optical path will exceed 100°, and the image will be taken from behind, resulting in the phenomenon of self-photographing. At the same time, the internal optical path is also prone to interference, making it difficult to achieve. If the lower limit of the conditional expression (5) is exceeded, the angle of the optical path will be less than 10°, which is too small to be of much practical significance. At the same time, the reflector is placed too flat, requiring too much space, making it difficult to achieve a miniaturized design.

[0030] If the upper limit of the conditional expression 10°≤ANG2≤100°(6) is exceeded, the angle between the optical axis of the rear magnification focusing group MACRO and the optical axis of the middle waterproof frame FST will exceed 100°, resulting in the phenomenon of self-photographing. At the same time, the internal optical path will be prone to interference, making it difficult to achieve. If the lower limit of the conditional expression (6) is exceeded, the angle of the optical path will be less than 10°, which is too low to be meaningful. At the same time, the reflector is placed too flat, requiring too much space, making it difficult to achieve a miniaturized design.

[0031] If the upper limit of the conditional expression 20°≤A01≤120°(7) is exceeded, the reflection angle will be too large, resulting in an increase in the volume of the prism and difficulty in miniaturization. If the lower limit of the conditional expression (7) is exceeded, the incident light and the reflected light will easily interfere with each other, making optical design more difficult and difficult to achieve mass production.

[0032] If the upper limit of the conditional expression 40°≤A02≤150°(8) is exceeded, the reflection angle will be too large, resulting in an increase in the volume of the prism and difficulty in miniaturization. If the lower limit of the conditional expression (8) is exceeded, the incident light and the reflected light will easily interfere with each other, making optical design more difficult and difficult to achieve mass production.

[0033] If the upper limit of the conditional expression 5°≤ANG3≤100° (9) is exceeded, the turning angle will be greater than 100°, which will easily expose the person behind the camera and is not the design goal. At the same time, the optical path is prone to interference, making it difficult to achieve. If the lower limit of the conditional expression (9) is exceeded, the turning angle is too small, and the purpose of turning the camera is lost.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The multifunctional waterproof and dustproof probe lens provides a multifunctional slender probe lens that is waterproof and dustproof and can switch between straight-viewing angles, oblique-viewing angles, and bent angles. By switching the locking handwheel, the front lens body with different viewing angles can be arbitrarily selected to meet the shooting requirements of different environments and different camera positions. The lens is easy to mass-produce, low-cost, and high-performance, and is widely used in special probe macro lenses required for video cameras and cameras. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of a multifunctional waterproof and dustproof probe lens provided by the present invention.

[0037] Figure 2 for Figure 1 Schematic diagram of the connection between the middle objective lens frame and the middle waterproof frame.

[0038] Figure 3 Schematic diagram of squint photography.

[0039] Figure 4 for Figure 3 Schematic diagram of the front-end lens angle.

[0040] Figure 5 Schematic diagram of the bent perspective shot.

[0041] Figure 6 for Figure 5 Schematic diagram of the front-end lens angle.

[0042] In the picture: 1. "O"-shaped waterproof ring; 2. Waterproof glue. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0044] Example 1

[0045] like Figure 1-2 As shown, from the object side to the image side, it includes the objective lens frame OBJ-A, the middle waterproof frame FST, the connecting joint GJ and the rear focus magnification group MACRO;

[0046] The rear focus magnification group MACRO includes the focus handwheel Foc1 and the aperture handwheel AP1. The objective lens frame OBJ-A contains two negative-power lenses and a prism that unfolds into a cylindrical flat lens PRZ. The reflector connecting the joint GJ cavity has been removed, achieving a direct-view shooting state.

[0047] The objective lens frame OBJ-A and the waterproof intermediate frame FST are connected via threads filled with waterproof adhesive and fitted with an O-ring. The O-ring is made of rubber or soft plastic. The waterproof intermediate frame FST is connected to the rear magnifying and focusing group MACRO via a switchable locking wheel SL. This allows for easy removal to replace the front lens with a different viewing angle, including those with oblique or angled viewing angles.

[0048] The thickness of the protective glass GL is GD = 0.8 mm;

[0049] The outer diameter of the middle waterproof frame FST is D0 = 27mm;

[0050] The inner diameter D1 of the middle waterproof frame FST is 23mm;

[0051] The length of the middle waterproof frame FST is FST-L=380 mm.

[0052] Example 2

[0053] like Figure 3-4 As shown, from the object side to the image side, it includes the objective lens frame OBJ-A, the middle waterproof frame FST, the connecting joint GJ and the rear focus magnification group MACRO;

[0054] The rear focus magnification group (MACRO) includes the focus handwheel Foc1 and the aperture handwheel AP1. The objective lens frame OBJ-A contains two negative-power lenses and a double-reflection prism PRZ, with a primary reflection angle of 80° and a secondary reflection angle of 110°. The reflector in the GJ joint cavity has been removed, enabling oblique shooting with a 30° optical axis rotation.

[0055] The objective lens frame OBJ-A and the waterproof intermediate frame FST are connected via threads filled with waterproof adhesive and fitted with an O-ring. The O-ring is made of rubber or soft plastic. The waterproof intermediate frame FST and the rear magnifying and focusing group MACRO are connected via a switchable locking wheel SL. This allows for easy removal to replace the front lens with a different viewing angle, including direct or tilting lenses.

[0056] The thickness GD of the protective glass GL is 2 mm.

[0057] The outer diameter of the middle waterproof frame FST is D0 = 30mm

[0058] The inner diameter of the middle waterproof frame FST is D1 = 26mm

[0059] The length of the middle waterproof frame FST is FST-L = 300mm

[0060] The first reflection of the prism is A01 = 80°

[0061] Secondary reflection of prism A01=110°

[0062] The optical axis angle is ANG3 = 30°

[0063] Example 3

[0064] like Figure 5-6 As shown, from the object side to the image side, it includes the objective lens frame OBJ-A, the middle waterproof frame FST, the connecting joint GJ and the rear focus magnification group MACRO;

[0065] The rear focus magnification group MACRO includes the focus handwheel Foc1 and the aperture handwheel AP1. The objective lens frame OBJ-A contains two negative-power lenses and a single-reflection prism PRZ with a single-reflection angle of ANG2 = 60°. A reflector with a single-reflection angle of ANG2 = 60° is also located within the cavity of the connecting joint GJ. The reflector's surface forms an angle of ANG1 = 30° with the optical axis of the waterproof mid-section frame FST. This creates two turns in the optical path, placing the objective lens's optical axis parallel to that of the rear focus magnification group MACRO, enabling the use of the same optical axis but different camera positions.

[0066] The objective lens frame OBJ-A and the waterproof mid-section frame FST are connected via threads filled with waterproof adhesive and fitted with an O-ring. The O-ring is made of rubber or soft plastic. The waterproof mid-section frame FST is connected to the rear magnifying and focusing group MACRO via a switchable locking wheel SL. This allows for easy removal to replace the front lens with a different viewing angle, including oblique or direct vision lenses.

[0067] The thickness GD of the protective glass GL is 3 mm.

[0068] The outer diameter of the middle waterproof frame FST is D0 = 35mm

[0069] The inner diameter of the middle waterproof frame FST is D1 = 30mm

[0070] The length of the middle waterproof frame FST is FST-L = 200mm

[0071] The first reflection of prism PRZ is ANG2 = 60°

[0072] The reflection angle ANG2 of the reflector connected to the inner cavity of the joint GJ is 60°

[0073] The angle ANG1 between the reflector surface of the GJ cavity and the middle waterproof frame is 30°

[0074] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional waterproof and dustproof probe lens, characterized in that: From the object side to the image side, it includes the objective lens frame OBJ-A, the middle waterproof frame FST, the connecting joint GJ and the rear focus magnification group MACRO; Among them, the rear focus magnification group MACRO includes the focus handwheel Foc1 and the aperture handwheel AP1; The objective lens frame OBJ-A contains several lenses and a prism PRZ. The prism PRZ can realize multiple structural changes according to the needs of the optical system, including a straight-viewing angle without reflection, a bent viewing angle with one reflection, and an oblique viewing angle with two reflections. There is a waterproof and dustproof protective glass GL on the object side of the objective lens frame OBJ-A. The waterproof and dustproof protective glass GL and the objective lens frame OBJ-A are connected by a waterproof gasket DP and related auxiliary structures to achieve the front-end waterproof function. Below the waterproof and dustproof protective glass GL is a meniscus lens G1 with negative refractive power; the thickness of the waterproof and dustproof protective glass GL is GD, and it meets the following conditional formula (1): 0.5mm≤GD≤4.0mm (1); The middle waterproof lens frame FST and the rear focus magnification group MACRO are connected by a connecting joint GJ. According to the optical path requirements, a reflector is placed in the inner cavity of the connecting joint GJ. The angle between the mirror surface of the reflector and the optical axis of the middle waterproof lens frame FST is ANG1, and the condition (5) is satisfied: 5°≤ANG1≤50° (5); Alternatively, the angle of the prism PRZ in the objective lens frame OBJ-A when realizing the primary reflection is the same as the primary mirror reflection angle in the connection joint GJ, so that the viewing angle direction is parallel to the optical axis of the rear focus magnification group MACRO, and the angle between the optical axis of the middle waterproof lens frame FST and the optical axis of the rear focus magnification group MACRO is ANG2, and the conditional formula (6) is satisfied: 10°≤ANG2≤100° (6); Alternatively, when the prism PRZ in the objective lens frame OBJ-A realizes two reflections, the first reflection angle is A01 and the second reflection angle is A02. Finally, the angle between the optical axis of the objective lens and the optical axis of the middle waterproof lens frame FST is ANG3, and the conditions (7), (8) and (9) are satisfied: 20°≤A01≤120° （7）； 40°≤A02≤150° （8）； 5°≤ANG3≤100° (9).

2. The multifunctional waterproof and dustproof probe lens according to claim 1, characterized in that: The objective lens frame OBJ-A and the middle waterproof frame FST are connected by threads, and waterproof glue is applied to the threads and an "O" type waterproof ring is attached to the threaded connection mechanism.

3. The multifunctional waterproof and dustproof probe lens according to claim 1, characterized in that: The length of the middle waterproof frame FST is FST-L, the outer diameter is FST-D0, the inner diameter is FST-D1, and it satisfies the conditions (2), (3) and (4): 18mm≤D0≤40mm (2); 10mm≤D1≤35mm (3); 100mm≤FST-L≤450mm (4).

4. The multifunctional waterproof and dustproof probe lens according to claim 1, characterized in that: The connecting joint GJ and the rear focus magnification group MACRO are connected by switching the locking handwheel SL.

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