CN1982169B - Electrostatic plastic lens dust protector - Google Patents

Abstract

An electrostatic dust-proof fixture for plastic lenses is used to accommodate and fix plastic lenses, which includes a carrier plate, a dust collecting part, an insulating layer and an electrostatic field source. The tray is provided with a plurality of accommodating holes, and plastic lenses are placed in the accommodating holes; the surface of the dust collecting part can generate static electricity, and the dust collecting part can cover the lenses placed in the tray; the negative pole of the electrostatic field source is connected to The carrier plate generates negative charges on the carrier plate, and the positive electrode of the electrostatic field source is connected to the dust collecting part to generate positive charges on the dust collecting part to attract dust. The plastic lens electrostatic dustproof fixture uses the principle of static electricity to improve the problem that the plastic lens is easy to absorb particles in the environment, prevent the lens from being polluted by the environment, and improve the pass rate of the lens, thereby avoiding the reduction of process efficiency and the failure of the camera optical module due to dirt. The problem of optical property degradation.

Description

Electrostatic dust-proof fixture for plastic lens

【Technical field】

The invention relates to a dust-proof fixture for plastic lenses, in particular to an electrostatic dust-proof fixture for plastic lenses.

【Background technique】

With the rapid development of multimedia technology, digital cameras and video cameras are becoming more and more popular among consumers. While people put forward higher requirements for the image quality of objects captured by digital cameras and video cameras, the demand for digital cameras, video cameras and other products is also increasing.

Optical components such as lenses are indispensable components in photographic devices such as digital cameras and video cameras. In the mass production scheme of digital cameras and camcorders, high-refractive index optical plastic injection molding optical components have become the mainstream of digital cameras and camcorders.

However, the plastic optical element is easy to generate static electricity on the surface, and its electricity is negative. After the lens is self-injected and placed on the carrier fixture, after the process of optical coating and assembly, the plastic lens may be exposed to the environment due to the negative charge on the surface. The neutral or positively charged particles are adsorbed on the surface of the plastic lens, which will cause the plastic lens to be dirty, reduce the production efficiency of the lens, and relatively increase the cost.

【Content of invention】

In view of this, it is necessary to provide a plastic lens dust-proof jig that can prevent the plastic lens from being dirty and improve the pass rate of the lens.

An electrostatic dust-proof fixture for plastic lenses is used to accommodate and fix plastic lenses, which includes a carrier plate, a dust collecting part, an insulating layer and an electrostatic field source. A plurality of accommodating holes are provided on the tray, and the accommodating holes are used to accommodate plastic lenses; the surface of the dust collecting part can generate static electricity, and the dust collecting part can cover the lenses placed in the tray; the electrostatic field source The negative electrode is connected to the carrier plate to generate negative charges on the carrier plate, and the positive electrode of the electrostatic field source is connected to the dust collecting part to generate positive charges on the dust collecting part to attract dust. Compared with the prior art, the plastic lens dust-proof fixture uses the principle of static electricity to improve the problem that the plastic lens is easy to absorb particles in the environment, reduce the environmental pollution of the lens, and improve the pass rate of the lens, thereby avoiding the process efficiency caused by dirt. The problem of degradation and optical performance degradation of the camera optical module.

【Description of drawings】

Fig. 1 is a perspective view of a tray for accommodating lenses in a preferred embodiment of the plastic lens electrostatic dustproof fixture of the present invention;

2 is a perspective view of a preferred embodiment of the plastic lens electrostatic dustproof fixture of the present invention;

Fig. 3 is a sectional view along III-III in Fig. 2 .

【Detailed ways】

Please refer to FIG. 1 to FIG. 3 , the preferred embodiment of the plastic lens electrostatic dustproof fixture of the present invention includes two carriers 10 , two dust collecting parts 20 , an insulating layer and two electrostatic field sources 50 . The plastic lens electrostatic dust-proof fixture is used to accommodate and hold the lens 40, wherein the lens 40 is a plastic lens, which includes an optical part 400 and a base 402, and the optical part 400 is located in the middle of the base 402, which is spherical or aspheric.

The carrier plate 10 is a thin plate, which is preferably made of metal. A plurality of accommodating holes 12 are defined on the carrier plate 10 , and the plurality of accommodating holes 12 are through holes arranged on the carrier plate 10 according to a certain rule, for accommodating and holding the lenses 40 . The accommodating hole 12 is a stepped through hole, including a coaxial light-transmitting portion 120 and an accommodating portion 122, and the diameter of the light-transmitting portion 120 is smaller than the diameter of the accommodating portion 122, so that at the junction of the two form steps. The diameter of the light-transmitting portion 120 is equivalent to the diameter of the optical portion 400 of the lens 40, and the diameter of the accommodation portion 122 is equivalent to the diameter of the outer circle of the base 402 of the lens 40. When the lens 40 is placed in the accommodation hole 12, the base 402 Located in the accommodating portion 122 , the optical portion 400 can be exposed through the light-transmitting portion 120 , so as to facilitate subsequent manufacturing processes of the lens 40 . The light-transmitting portion 120 can also be a trumpet-shaped circular hole, that is, the diameter of one end connected to the accommodating portion 122 is equivalent to the diameter of the optical portion 400 of the lens 40 , and the diameter of the other end is larger.

The dust collecting part 20 is a thin metal plate, the dust collecting part 20 can be charged with static electricity, and the electrostatic force field is stronger than the electrostatic force field on the surface of the plastic lens 40 .

In this embodiment, the insulating layer is a plurality of spacers 30, the plurality of spacers 30 are made of insulating material, and are arranged on the upper edge of the surface of the carrier plate 10 adjacent to the light-transmitting portion 120, without covering the carrier plate Accommodating hole 12 on 10. The dust collecting part 20 is pasted on the gasket 30 to cover the surface of the carrier plate 10 adjacent to the light passing part 120 , so as to cover the optical part 400 of the lens 40 and prevent the lens 40 from dust.

The electrostatic field source 50 is a power supply that can generate DC voltage. The positive pole of the electrostatic field source 50 is connected to the dust collecting part 20, and the negative pole is connected to the carrier disc 10, so that there is an electrostatic field between the carrier disc 10 and the dust collecting part 20, and the collector The dust portion 20 is positively charged, and the carrier plate 10 is negatively charged.

During the operation, one of the trays 10 is placed with the surface of the light-transmitting portion 120 facing down, and a plurality of lenses 40 are respectively placed in the accommodating portions 122 of the plurality of accommodating holes 12 on the tray 10, and the other tray 10 is 10 is opposite to the one carrier plate 10, that is, the light-transmitting portion 120 of the other carrier plate 10 is located above its accommodating portion 122, and makes the light-transmitting portion 120 and the light-transmitting portion 120 or the accommodating hole 12 of the carrier plate 10 below it After the optical part 400 of the inner lens 40 is aligned, it is pressed on the top of the first carrier plate 10, so that the two carrier plates 10 are relatively fixed. , while the other part is located in the accommodating portion 122 of the upper tray 10 . At the same time, the optical portion 400 of the lens 40 is exposed through the light-transmitting portion 120 of the two discs 10 . Place gaskets 30 on the surfaces of the two trays 10 with light-transmitting portions 120 respectively, and place the dust collecting portion 20 on the gaskets 30, so that the dust collecting portion 20 covers the tray 10 and the lens 40 in the accommodating hole 12 thereof. Optics 400. The positive pole of the electrostatic field source 50 is connected to the dust collecting part 20 , and the negative pole is connected to the carrier plate 10 . Since the static electricity generated by the dust collecting part 20 and the plastic lens 40 is negatively charged, the particles that may have been attached to the optical plastic lens 40 will be attracted by the dust collecting part 20 due to the strong electrostatic force on the dust collecting part 20, thereby making the lens 40 keeps it clean.

Obviously, in addition to the gasket 30, the insulating layer can also be replaced by an insulating coating provided on the surface of the dust collecting part 20 close to the carrier plate 10, then the dust collecting part 20 is directly attached to the carrier plate 10 That's it. The carrier plate 10 can be only one, and the depth of the accommodating part 122 of the carrier plate 10 is increased to be equivalent to the thickness of the base 402 of the lens 40, so that the lens 40 is completely accommodated therein, and the dust collecting part 20 and the pad Sheets 30 are arranged on both sides of the tray 10, so that the dust collecting part 20 covers the lens 40 in the accommodating hole 12; The part of the accommodating part 122 is exposed and abuts against the dust collecting part 20, and the dust collecting part 20 is attached to the surface of the carrier plate 10 having the light through hole 120 and the gasket 30 on the surface of the accommodating part 122, thereby covering the accommodating part 122. The lens 40 in the hole 12 is placed.

In addition, the relative fixation of the two carrier discs 10 can be direct compression by means of interference fit; it is also possible to set a Screws fix the two carrier plates 10 to each other. The two dust-collecting parts 20 can be combined into one, and the dust-collecting part 20 is folded in half, and the folding line is located at the edge where the two carrier discs 10 are adjacent, and the dust-collecting part 20 can cover the two carrier discs 10 at the same time. The electrostatic field source 50 can be one, and the positive pole of the electrostatic field source 50 is connected to the dust collecting part 20, and the negative pole is respectively connected to two carrier discs 10; obviously, when there is only one carrier disc 10, the half-fold line of the dust collecting part 20 is located on the carrier disc 10, the dust collecting part 20 can cover the upper and lower sides of the carrier disc 10 at the same time, and both sides of the lens 40 optical part 400 placed in the carrier disc 10 can be protected by the dust collecting part 20. At this time, the electrostatic field source 50 It may be one, and the positive electrode of the electrostatic field source 50 is connected to the dust collecting part 20 , and the negative electrode is connected to the carrier plate 10 .

The plastic lens dust-proof fixture uses the principle of static electricity to improve the problem that the plastic lens 40 is easy to absorb particles in the environment, prevent the lens 40 from being polluted by the environment, prevent the plastic lens 40 from being dirty, and improve the pass rate of the lens 40, thereby avoiding the problem of Contamination leads to reduced process efficiency and reduced optical performance of camera optical modules.

Claims (10)

1. An electrostatic dust-proof fixture for plastic lenses, used to carry lenses, which includes a carrier plate, characterized in that: the electrostatic dust-proof fixture for plastic lenses also includes a dust collection part, an insulating layer and an electrostatic The field source, wherein, the carrier plate is provided with a plurality of accommodation holes, and the surface of the dust collecting part generates static electricity and covers the plurality of accommodation holes; the insulating layer is made of insulating material, and is arranged between the carrier plate and the collecting Between the dust parts; the negative electrode of the electrostatic field source is connected to the carrier plate to generate negative charges on the carrier plate, and the positive electrode of the electrostatic field source is connected to the dust collecting part to generate positive charges on the dust collecting part to attract dust. 2. The plastic lens electrostatic dustproof fixture according to claim 1, wherein the lens accommodated and held by the plastic lens electrostatic dustproof fixture includes an optical part and a base, and the optical part is located on the base. The middle part of the seat is an aspheric lens. 3. The plastic lens electrostatic dustproof fixture according to claim 2, characterized in that: the accommodating hole is a stepped through hole, including a coaxially arranged light-transmitting portion and accommodating portion, and the through-hole The diameter of the optical part is smaller than the diameter of the accommodating part. 4. The plastic lens electrostatic dust-proof fixture according to claim 3, wherein the diameter of the light-transmitting part is equivalent to the diameter of the optical part of the lens, and the diameter of the accommodating part is equal to the outer circle of the base of the lens Equivalent in diameter. 5. The plastic lens electrostatic dust-proof fixture as claimed in claim 3, characterized in that: said plastic lens dust-proof fixture also includes another carrier, and the other carrier is matched with said carrier; A surface of the carrier plate with a light-transmitting portion is placed downwards, a plurality of lenses are respectively placed in the accommodation portions of the plurality of accommodating holes of the carrier plate, and the other carrier plate is placed opposite to the one carrier plate, so that the lens A part of the base is located in the accommodating portion of the lower carrier, and the other part is located in the accommodating portion of the upper carrier. 6. The electrostatic dust-proof fixture for plastic lenses as claimed in claim 5, wherein the carrier plate and the dust collecting part are made of metal materials. 7. The electrostatic dust-proof fixture for plastic lenses as claimed in claim 3, characterized in that: the depth of the accommodating part of the carrier plate is equivalent to the thickness of the base of the lens, the lens is completely accommodated in it, and the dust collecting part It is directly attached to both sides of the carrier plate and covers the lens in the accommodating hole. 8 . The electrostatic dustproof fixture for plastic lenses according to claim 2 , wherein the dust collecting part covers the carrier plate and the optical part of the lens exposed through the accommodating hole thereof. 9 . 9. The electrostatic dust-proof fixture for plastic lenses according to claim 1, characterized in that: the insulating layer is an insulating coating provided on the surface of a plurality of gaskets or dust collecting parts close to the carrier plate, and the insulating layer There is no overlap with the receiving hole on the tray. 10. The electrostatic dust-proof fixture for plastic lenses according to claim 1, wherein the electrostatic field source is a power supply capable of generating DC voltage.

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