Device capable of realizing different apertures and optical imaging module

Abstract

The invention discloses a device capable of realizing different apertures and an optical imaging module, the device comprises a shading carrier strip, a first winding and unwinding mechanism and a second winding and unwinding mechanism, one end of the carrier strip is wound on the first winding and unwinding mechanism, the other end of the carrier strip is wound on the second winding and unwinding mechanism, a plurality of light through holes are formed in the carrier strip in a penetrating manner, and the light through holes are communicated with the carrier strip. The first winding and unwinding mechanism and the second winding and unwinding mechanism can drive the carrying strip to move, so that different light through holes can move to the front of the imaging lens, and apertures with different sizes are formed. Blades are not needed, the problem that the effect of the aperture is affected by friction between the blades does not exist, timely response of the aperture can be ensured, the size of the light through hole is set in advance, the consistency of the light through quantity can be ensured, and the problem that the light through quantity is inconsistent due to the fact that the sizes of the aperture holes are inconsistent due to blade movement is avoided. In addition, the aperture size precision of the variable aperture is higher, the instability of mechanical change of a traditional aperture is reduced, and the compatibility of the variable aperture is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, more particularly, to a device capable of realizing different apertures and an optical imaging module. BACKGROUND

[0002] The aperture is an important component of the optical imaging module, and the area of the aperture directly affects the light intake of the imaging module. The variable aperture can adjust the area of the aperture, thereby improving the imaging quality of the imaging module in different shooting environments. Among them, the variable aperture on the market usually has multiple blades, such as the Chinese invention patent with the patent number 202420377663.4 and the name of variable aperture assembly, lens module and electronic device. Its principle is to drive the blades to open and close synchronously through a mechanical driving mechanism, thereby combining a polygonal light hole, and forming different size apertures by changing the size of the central aperture. Its advantage is that the adjustment range is large, but such a variable aperture has the following disadvantages: in the process of opening and closing the blades, factors such as friction between the blades, mechanical clearance, mechanical control precision and response speed will affect the actual performance of the aperture, and the movement of the blades is easy to cause the size of the aperture hole to be inconsistent, resulting in inconsistent light transmission. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned defects in the prior art, and to provide a device capable of realizing different apertures and an optical imaging module, which does not have the problem of affecting the aperture effect due to friction between the blades, can ensure that the aperture responds in time, and can avoid the problem of inconsistent light transmission caused by inconsistent aperture hole size due to blade movement.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a device capable of realizing different apertures, comprising a carrier strip, a first take-up and pay-off mechanism and a second take-up and pay-off mechanism, one end of the carrier strip is wound on the first take-up and pay-off mechanism, the other end of the carrier strip is wound on the second take-up and pay-off mechanism, the carrier strip is made of a light-shielding base material, a plurality of light transmission holes of different sizes are arranged in sequence along the length direction of the carrier strip, and the first take-up and pay-off mechanism and the second take-up and pay-off mechanism can drive the carrier strip to move to switch different light transmission holes.

[0005] Preferably, the inner hole size of the light transmission hole on the carrier strip gradually increases or gradually decreases along the length direction of the carrier strip.

[0006] Preferably, the light transmission hole on the carrier strip is provided as a circular hole, a square hole, a polygonal hole or a ring-shaped tooth-shaped hole.

[0007] Preferably, the light transmission hole on the carrier strip is arranged in a center equidistant manner, an edge equidistant manner or a non-equidistant manner.

[0008] Preferably, the inner hole size of the light passing hole on the carrier strip is 0.2mm-75mm.

[0009] Preferably, the light passing hole on the carrier strip is made by punching or laser cutting.

[0010] Preferably, the edge of the light passing hole on the carrier strip is chamfered.

[0011] The second aspect of the present application provides an optical imaging module, comprising an imaging lens and the device capable of realizing different apertures, wherein the imaging lens is located at the rear side of the carrier strip, and the different light passing holes on the carrier strip can be switched to the front of the imaging lens.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1. The structure of the present application is simple and reasonable, and the carrier strip, the first winding and unwinding mechanism and the second winding and unwinding mechanism are provided, a plurality of light passing holes of different sizes are arranged on the carrier strip in sequence along the length direction of the carrier strip, the first winding and unwinding mechanism and the second winding and unwinding mechanism can drive the carrier strip to move, so that different light passing holes can be moved to the front of the imaging lens to form different size apertures, the present application does not need to use blades, and there is no problem of affecting the aperture effect due to the friction between the blades, the aperture can be ensured to respond in time, and the size of the light passing hole is pre-set, which will not change after multiple uses, the consistency of the light passing amount can be ensured, and the problem of inconsistent light passing amount caused by inconsistent aperture hole size due to blade movement can be avoided.

[0014] 2. The aperture size precision of the variable aperture of the present application is higher, and the instability of the traditional aperture mechanical change is reduced.

[0015] 3. The present application can adapt to carrier strips of different thicknesses and different materials, and has better compatibility. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic view of the device capable of realizing different apertures;

[0018] Figure 2 is a structural schematic view of the first carrier strip;

[0019] Figure 3is a structural diagram of the second kind of carrier strip;

[0020] Figure 4 is a shape diagram of the second kind of light hole;

[0021] Figure 5 is a shape diagram of the third kind of light hole;

[0022] Figure 6 is a shape diagram of the fourth kind of light hole;

[0023] Figure 7 is a shape diagram of the fifth kind of light hole;

[0024] Figure 8 is a partial sectional view of the carrier strip at the position of the light hole;

[0025] Figure 9 is a structural diagram of the optical imaging module. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0027] Embodiment 1

[0028] Please refer to Figure 1 Embodiment 1 of the present application provides a device capable of realizing different apertures, which comprises a carrier strip 1, a first take-up and pay-off mechanism 2 and a second take-up and pay-off mechanism 3. One end of the carrier strip 1 is wound on the first take-up and pay-off mechanism 2, and the other end of the carrier strip 1 is wound on the second take-up and pay-off mechanism 3. The components of the present embodiment will be described in detail below with reference to the drawings.

[0029] In the present embodiment, the carrier strip 1 can be made of a rectangular sheet-shaped light shielding base material. Preferably, the light shielding base material can be plastic material with both sides black or plastic material with light shielding coating on both sides. The plastic material can be preferably PI or PET. Of course, other light shielding materials such as metal materials such as copper, stainless steel and other non-metallic materials can also be used according to actual needs, as long as the thickness is thin and good light shielding effect can be achieved, which is not limited to the present embodiment.

[0030] As Figure 2As shown, the carrier strip 1 is penetrated by a plurality of light holes 11 of different sizes and arranged in sequence along the length direction of the carrier strip 1. The light holes 11 on the carrier strip 1 can be set as circular holes. Of course, in other embodiments, according to actual needs, such as Figures 4 to 7 As shown, the light-through hole 11 can also be set as a square hole, a polygonal hole (such as a pentagon, hexagon, etc.), an annular tooth-shaped hole or other special-shaped holes.

[0031] The inner hole sizes of the light holes 11 on the carrier strip 1 may gradually increase or decrease along the length of the carrier strip 1. Of course, according to actual needs, the light holes 11 on the carrier strip 1 may not be arranged in the order of inner hole size.

[0032] Preferably, the inner hole size of the light-through hole 11 on the carrier strip 1 can be preferably set to 0.2 mm to 75 mm. Of course, in other embodiments, other inner hole sizes can also be set, which can be determined according to the aperture size and level required by the product lens.

[0033] like Figure 2 As shown, the light holes 11 on the carrier strip 1 can be arranged in a center-equidistant manner. In other embodiments, as Figure 3 As shown, the light holes 11 can also be arranged in an equidistant manner. Of course, according to actual needs, the light holes 11 can also be arranged in a non-equidistant manner.

[0034] During specific manufacturing, the light-through hole 11 on the carrier strip 1 can be made by punching or laser cutting.

[0035] As a further improvement of this embodiment, Figure 8 As shown, the edge of the light hole 11 on the carrier strip 1 can also be provided with a bevel chamfer 12, wherein the bevel chamfer 12 inside the light hole 11 can reduce the vertical height of the side elevation, reduce the light reflected by the side wall, and effectively improve stray light.

[0036] In this embodiment, preferably, both the first reeling and unreeling mechanism 2 and the second reeling and unreeling mechanism 3 can be configured as motors. Further, a stepping motor, a voice coil motor, a servo motor, etc. can be selected, and the rotating shaft of the motor can be connected to the end of the carrier strip 1. Of course, additional components such as a reel for reeling can also be provided between the motor and the carrier strip.

[0037] During operation, the first retracting and unreeling mechanism 2 and the second retracting and unreeling mechanism 3 can drive the carrier strip 1 to move, so as to switch between different light holes 11 and form apertures of different sizes.

[0038] Example 2

[0039] Please refer to Figure 9Embodiment 2 of the present application provides an optical imaging module, which comprises an imaging lens 4 and the device capable of realizing different apertures as described in Embodiment 1 above, and the imaging lens 4 is located at the rear side (i.e. the light exit side) of the carrier strip 1.

[0040] In operation, according to the size of the aperture required by the imaging lens 4, the first winding and unwinding mechanism 2 and the second winding and unwinding mechanism 3 are controlled to operate, driving the carrier strip 1 to move, so that the required light passing hole 11 can be switched to the front of the imaging lens 4 (i.e. the light entrance position).

[0041] In summary, the present application has simple structure and reasonable design, does not need to use blades, and does not have the problem of affecting the aperture effect due to the friction between the blades, can ensure the timely response of the aperture, and the size of the light passing hole is pre-set and will not change after multiple uses, can ensure the consistency of the light passing amount, and avoid the problem of inconsistent light passing amount caused by the inconsistent size of the aperture hole caused by the movement of the blades. In addition, the aperture size precision of the variable aperture of the present application is higher, reduces the instability of the traditional aperture mechanical change, and can be adapted to carrier strips of different thicknesses and different materials, and has better compatibility.

[0042] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited by the above embodiments, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods, and all are included in the protection scope of the present application.

Claims

1. A device capable of achieving different apertures, characterized in that: It includes a carrier strip, a first reeling and unreeling mechanism and a second reeling and unreeling mechanism, one end of the carrier strip is reeled on the first reeling and unreeling mechanism, and the other end of the carrier strip is reeled on the second reeling and unreeling mechanism. The carrier strip is made of a light-shielding substrate, and is penetrated by a plurality of light-through holes of different sizes arranged in sequence along the length direction of the carrier strip. The first reeling and unreeling mechanism and the second reeling and unreeling mechanism can drive the carrier strip to move to switch between different light-through holes.

2. The device capable of achieving different apertures according to claim 1, characterized in that: The inner hole size of the light-through hole on the carrier strip gradually increases or decreases along the length direction of the carrier strip.

3. The device capable of achieving different apertures according to claim 1, wherein: The light-through holes on the carrier strip are configured as circular holes, square holes, polygonal holes or annular tooth-shaped holes.

4. The device capable of achieving different apertures according to claim 1, wherein: The light holes on the carrier strip are arranged in a center equidistant manner, an edge equidistant manner, or a non-equidistant manner.

5. The device capable of achieving different apertures according to claim 1, wherein: The inner hole size of the light-through hole on the carrier strip is set to 0.2mm-75mm.

6. The device capable of achieving different apertures according to claim 1, wherein: The light holes on the carrier strip are made by punching or laser cutting.

7. The device capable of achieving different apertures according to any one of claims 1 to 6, characterized in that: The edges of the light-through holes on the carrier strip are provided with bevel chamfers.

8. An optical imaging module, comprising an imaging lens, characterized in that: It also includes the device capable of achieving different apertures as described in any one of claims 1 to 7, wherein the imaging lens is located at the rear side of the carrier bar, and the different light holes on the carrier bar can be switched one by one to the front of the imaging lens.

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