CN215641912U - Diaphragm and laser - Google Patents
Diaphragm and laser Download PDFInfo
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- CN215641912U CN215641912U CN202122374887.9U CN202122374887U CN215641912U CN 215641912 U CN215641912 U CN 215641912U CN 202122374887 U CN202122374887 U CN 202122374887U CN 215641912 U CN215641912 U CN 215641912U
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Abstract
The embodiment of the utility model discloses a diaphragm and a laser, wherein a dustproof mirror is arranged on a diaphragm substrate to prevent dust deposition of an optical system, and meanwhile, a plurality of side planes of the dustproof mirror are obliquely arranged, so that adverse effects on the performance of the optical system caused by the arrangement of the dustproof mirror are greatly reduced. The diaphragm in the embodiment of the utility model comprises a diaphragm base body and a dustproof mirror, wherein the available light emergent end of the diaphragm base body is provided with a diaphragm hole; the dustproof mirror is composed of a plurality of side planes, and the side planes are inclined to the vertical plane of the main optical axis; the dustproof mirror is provided with a light-transmitting and non-light-transmitting hole for transmitting the usable light emitted from the diaphragm hole; the dust-proof mirror is fixed on the outer end face of the available light emergent end of the diaphragm substrate.
Description
Technical Field
The embodiment of the utility model provides a diaphragm and a laser, which relate to the field of optics, in particular to an optical element in the field of optics.
Background
In an optical system, a diaphragm is commonly used for restricting a light beam to obtain a better usable light beam, but dust often falls onto optical elements such as a lens or a light source through a diaphragm hole or an end face hole of a diaphragm base body in the use process of the optical system; dust falling on optical elements such as a lens or a light source is difficult to clean in time due to the structure of an optical system and the like.
The nature of dust is the tiny particulate matter of various materials, and the phenomenon such as transmission, diffuse reflection, refraction can take place when the light shines on the dust. Therefore, dust falls on optical elements such as a lens or a light source and is accumulated to have a great influence on the performance of the optical system; the influence is particularly prominent in photoetching direct-writing equipment with high precision requirement, and the dust accumulation in an optical system in laser welding or laser cutting equipment can also greatly influence the service performance of the equipment.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a diaphragm and a laser, wherein the dust-proof mirror is arranged on a diaphragm substrate to solve the problem of dust deposition of an optical system, and the side surface of the dust-proof mirror is obliquely arranged to solve the problem of adverse effect on the performance of the optical system due to the arrangement of the dust-proof mirror.
The first aspect of the embodiments of the present invention provides a diaphragm, which includes a diaphragm base and a dust-proof mirror, wherein a diaphragm hole is formed at an available light emergent end of the diaphragm base; the dustproof mirror is composed of a plurality of side planes, and the side planes are inclined to the vertical plane of the main optical axis; the dustproof mirror is provided with a light-transmitting hole which is light-transmitting and does not pass through air and is used for transmitting the available light emitted from the diaphragm hole;
the dust-proof mirror is fixed on the outer end face of the available light emergent end of the diaphragm substrate.
Alternatively, as a possible embodiment, the outer end surface of the light exit end of the diaphragm base body is provided with a plurality of side planes matched with the dust-proof mirror, so that the dust-proof mirror can be attached and fixed on the outer end surface of the light exit end of the diaphragm base body.
Optionally, as a possible implementation manner, an angle between the side plane and a vertical plane of the main optical axis ranges from 1 degree to 8 degrees.
Alternatively, as a possible embodiment, the side plane is a sector plane or a triangular plane.
Alternatively, as a possible embodiment, the inner end surface of the available light exit end of the diaphragm base body is a bevel inclined to the vertical plane of the main optical axis.
Optionally, as a possible implementation, the body of the diaphragm base is made of a heat conductive material; and a layer of light absorption material is arranged on the surface of the inner hole of the main body of the diaphragm base body.
Optionally, as a possible embodiment, the surface of the inner hole of the diaphragm base body is a rough surface.
A second aspect of the embodiments of the present invention provides a diaphragm, including a diaphragm substrate and a dust-proof mirror, wherein the dust-proof mirror has a light-transmitting hole that is light-transmitting and non-light-transmitting, and the dust-proof mirror is a non-light-transmitting portion except for other portions of the light-transmitting hole in a direction of propagation of usable light;
the dustproof mirror is composed of a plurality of side planes, and the side planes are inclined to the vertical plane of the main optical axis;
the dust-proof mirror is fixed on the end face of the light-emitting end of the diaphragm base body.
Optionally, as a possible implementation manner, an angle between the side plane and a vertical plane of the main optical axis ranges from 1 degree to 8 degrees.
Optionally, as a possible implementation manner, the dustproof mirror is recessed in the inner space of the cylindrical structure of the diaphragm base body, or protrudes out of the inner space of the cylindrical structure of the diaphragm base body.
Optionally, as a possible implementation manner, the other parts of the inner surface of the dust-proof mirror except the diaphragm hole are rough surfaces.
A third aspect of embodiments of the present invention provides a laser, which includes a light source circuit, a laser base, and a diaphragm as in any possible implementation manner of the first aspect and the second aspect; wherein the diaphragm is mounted on the laser base; an accommodating space for accommodating the light source circuit is arranged in the laser base in an extending manner; the light source circuit is used for generating laser with preset wavelength in a preset laser propagation direction.
Has the advantages that: the dustproof mirror in the technical scheme of the utility model is provided with the light-transmitting hole which is light-transmitting and does not pass through air, so that dust can be prevented from being deposited on the optical lens. Each side surface of the dustproof mirror is arranged in a vertical plane inclined to the main optical axis, namely each side surface of the dustproof mirror is not vertically arranged relative to the main optical axis of the optical system, and reflected light reflected back by the dustproof mirror can obliquely shoot to the surface of an inner hole of the diaphragm base body, so that half-wave loss caused by glancing or vertical incidence of incident light can be avoided, and the power of available light is reduced. Meanwhile, the light reflected by the dustproof mirror is reflected to the surface of the inner hole of the diaphragm base body, so that the reflected light can be reduced from being converged on the lens and the light source to form energy concentration, and the influence of the radiated light on the service lives of the lens and the light source is reduced.
Secondly, the surface of the diaphragm base body is provided with a layer of light absorption material, and the light absorption material can absorb most of light irradiated on the surface of the diaphragm base body, so that the influence of stray light on available light beams can be reduced. The heat energy generated after the light absorption material absorbs the light energy can be transferred to the heat conduction material, so that the heat energy is further transferred to the outside of the optical system through the heat conduction material, the influence of the temperature on the optical system can be reduced, and the adverse effect on the service life of the light source caused by the overhigh temperature near the light source can be avoided.
Drawings
FIG. 1 is a schematic diagram of the optical path of a usable light beam through a dust-proof mirror when the dust-proof mirror is disposed perpendicular to the primary optical axis of an optical system;
FIG. 2 is a schematic perspective view of an alternative construction of a diaphragm substrate in an embodiment of the utility model;
FIG. 3 is a schematic perspective view of an alternative construction of a dust mirror in an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an alternative configuration of an aperture in an embodiment of the utility model;
FIG. 5 is a schematic representation of the reflection of light toward the dust mirror of the diaphragm in an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of an alternative configuration of an aperture in an embodiment of the utility model;
fig. 7 is a schematic cross-sectional view of an alternative configuration of an aperture in an embodiment of the utility model.
Detailed Description
The main optical axis in the present document refers to a straight line passing through the centers of two spherical surfaces of a thin lens in geometric optics; "usable light" is understood to mean that the light emitted by the light source is a portion of the light beam which is refracted by the lens and then focused on the main optical axis; the term "aperture" is understood to mean an optical space (shape) for confining light emitted from an optical element such as a lens or a light source to the "aperture" to obtain a desired light beam for a machining operation of a part, and is not understood to mean a hole through which light passes in a general sense, and may be a through hole without filling or a light-transmitting hole filled with a transparent material, and the shape of the hole may be circular or other polygonal shapes such as a hexagon. Other words, phrases and phrases in this specification should be understood to have the meanings as defined by the trade names in the optical domain unless otherwise specified, and to have the ordinary meanings as defined in the optical domain unless otherwise specified.
In the prior art, since the diaphragms are usually arranged at the tail ends of the optical system, the optical lenses are usually in direct contact with the outside air. In order to prevent dust accumulation on the optical lenses, the applicant has noted that a dust-proof mirror can be provided at the available light exit end of the diaphragm base body, in order to achieve the effect of preventing dust from passing through the diaphragm aperture or the end face aperture of the diaphragm base body into the interior of the optical system.
As shown in fig. 1, the applicant further noticed that when a glass protection layer is disposed at the aperture, if the glass protection layer is perpendicular to the main optical axis 100 of the optical system, the direction of the reflected light 200, in which part of the light is reflected when the usable light 300 passes through the glass protection layer, is exactly opposite to the exit direction of the usable light beam 300, and the phase of the reflected light wave is abruptly changed by pi with respect to the incident light wave, half-wave loss occurs, so that the usable power of the usable light is reduced. And a part of the light is refracted by the lens and then converged on the light source, and the service life of the lens and the light source is influenced due to the concentration of energy. Therefore, there is a need for further improvements in diaphragms that avoid the above-mentioned drawbacks.
Referring to fig. 2 to 4, an aperture of an embodiment of the utility model includes an aperture substrate 1 and a dust-proof mirror 2. As shown in fig. 2 and 4, the main body structure of the diaphragm base 1 may be a hollow cylindrical structure (the side surface may be an arc curved surface or a flat surface), and the light-emitting end of the diaphragm base 1 may have a diaphragm hole 3. As shown in fig. 3, the dust-proof mirror 2 is constituted by a plurality of side planes inclined to the vertical plane of the main optical axis. It should be noted that, for simplicity of description, the following embodiments are only described by taking a sector plane as an example, and in practical application, the side plane may be a sector plane or a triangular plane, which is not limited herein.
The light hole 2-1 (for transmitting the part of the available light) on the dust-proof mirror 2 is transparent, and the rest part 2-2 can be opaque or transparent, and is not limited herein. The dust-proof mirror 2 is fixed on the outer end face of the diaphragm base body at the available light exit end. The dust-proof mirror 2 can be mounted on the diaphragm base body 1 by means of clamping or UV glue bonding, and the specific connection manner is not limited here.
Alternatively, as a possible embodiment, the outer end face of the available light exit end of the diaphragm substrate 1 except for the diaphragm aperture 3 is provided with a plurality of side planes matching the dust-proof mirror 2, so that the dust-proof mirror 2 can be attached and fixed to the outer end face of the available light exit end of the diaphragm substrate 1. Alternatively, the outer end surface of the available light emitting end of the diaphragm base body 1 may be recessed into the inner space of the cylindrical structure, and may also be protruded out of the inner space of the cylindrical structure.
As shown in fig. 5, when the dust-proof mirror protrudes out of the inner space of the cylindrical structure, each side surface of the dust-proof mirror 2 is inclined to the main optical axis 100 rather than perpendicular to the main optical axis 100, and each side surface of the dust-proof mirror 2 can enable the part of the reflected light 200 reflected back by the dust-proof mirror 2 to emit to the inner hole surface of the diaphragm base body 1, so that the power reduction of the available light due to the half-wave loss generated in the reflection process under the condition of grazing incidence or perpendicular incidence of the available light 300 can be avoided. Meanwhile, the light reflected by the dustproof mirror reflects to the surface of the inner hole of the diaphragm base body, so that the light reflected by the dustproof mirror can be prevented from being converged on the lens and the light source to form energy concentration, and the influence of the reflected light on the service life of the lens and the light source is reduced.
Alternatively, as a possible embodiment, the inner bore surface of the diaphragm base 1 may be provided as a rough surface. The rough surface can make the inner hole surface of the diaphragm base body 1 generate diffuse reflection, the reflected light is reduced to be converged on the lens and the light source, the concentration effect of energy at the lens and the light source is weakened, and the service life of the lens and the light source is prolonged.
In order to further reduce the effect of condensing the reflected light at the lens, as shown in fig. 6, alternatively, as a possible embodiment, the inner end surface of the available light exit end of the diaphragm base body 1 may be provided with a slope inclined to the vertical plane of the main optical axis. The specific bevel type may be a single bevel or a multiple bevel, and is not limited herein.
Alternatively, as a possible embodiment, the main body of the diaphragm base body 1 is made of a heat conductive material (e.g., a mixture of heat conductive silicone and copper particles, graphene, alumina heat conductive rubber, boron nitride heat conductive rubber, or the like). Optionally, a layer of light absorbing material is disposed on the surface of the inner hole of the main body of the diaphragm base 1 (the light absorbing material is a material that does not transmit light when irradiated on an object, does not generate mapping and massive flare or reflection, but diffusely reflects part of light after absorbing light, thereby maintaining regular light and shade levels, such as carbon nanotube black bodies, etc.).
The included angles between each side plane of the dustproof mirror 2 and the vertical plane of the main optical axis are different, and the reflected light has different influences on the performance of available light. In view of this, in order to minimize the concentration of the reflected light at the lens, the angle between each side plane of the dust-proof mirror 2 and the vertical plane of the main optical axis may be set to 1 degree to 8 degrees.
Referring to fig. 7, an embodiment of the utility model further provides a diaphragm, which includes a diaphragm substrate 1 and a dust-proof mirror 2. As shown in fig. 3, the dust-proof mirror 2 has a transparent hole 2-1 which is transparent and non-transparent, and the other part 2-2 of the dust-proof mirror 2 except the transparent hole 2-1 is a non-transparent part; the dust-proof mirror 2 is composed of a plurality of side planes which are inclined to the vertical plane of the main optical axis. The side plane of the dustproof mirror 2 may be an internal space recessed in the cylindrical structure of the diaphragm base, or may be an internal space protruding out of the cylindrical structure of the diaphragm base, and is not particularly limited.
The dust-proof mirror 2 is fixed on the end face of the usable light exit end of the diaphragm base body 1 so that the usable light can pass through the light-transmitting hole 2-1 of the dust-proof mirror 2 after passing through the diaphragm base body 1.
Alternatively, as a possible embodiment, the main body of the diaphragm base body 1 is made of a heat conductive material (e.g., a mixture of heat conductive silicone and copper particles, graphene, alumina heat conductive rubber, boron nitride heat conductive rubber, or the like). Optionally, a layer of light absorbing material is disposed on the surface of the inner hole of the main body of the diaphragm base 1 (the light absorbing material means that light rays irradiate on objects, no transmission exists outside the illumination, and mapping and massive flare and reflection are not generated, such as carbon nanotube black bodies and the like).
The applicant has noticed that the usable light beam is often reflected back by a small portion when it strikes the surface of the machined part, and the reflected light is reflected back onto the machined part after it strikes the surface of the dust-proof mirror, thereby affecting the machining accuracy of the optical system. In order to overcome the above-mentioned drawbacks, alternatively, the outer surface of the dust-proof mirror in the embodiment of the present invention may be provided with a rough surface, and diffuse reflection may occur when light is irradiated to the surfaces on the dust-proof mirror. The presence of a rough surface of the dust-proof mirror facing the inner bore of the diaphragm base can reduce the adverse effect of reflected light on the usable light beam.
On the basis of any of the above embodiments, an embodiment of the present invention further provides a laser, which may include a light source circuit, a laser base, and the diaphragm in any of the above embodiments. Wherein the content of the first and second substances,
the diaphragm is installed on the laser base, and the specific connection mode may be detachable connection or non-detachable connection, and is not limited herein.
The laser base is internally provided with an accommodating space for accommodating the light source circuit in an extending manner, and the specific shape of the laser base can be reasonably arranged according to requirements without limitation.
The light source circuit of the laser is used for generating laser with preset wavelength in the preset laser propagation direction. The specific implementation manner of the light source circuit is a mature prior art, and is not described herein.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The diaphragm is characterized by comprising a diaphragm base body and a dustproof mirror, wherein the available light emergent end of the diaphragm base body is provided with a diaphragm hole;
the dustproof mirror is composed of a plurality of side planes, and the side planes are inclined to the vertical plane of the main optical axis; the dustproof mirror is provided with a light-transmitting and non-light-transmitting hole for transmitting the usable light emitted from the diaphragm hole;
the dust-proof mirror is fixed on the outer end face of the available light emergent end of the diaphragm substrate.
2. An optical diaphragm according to claim 1, wherein the outer end face of the light exit end of the diaphragm base body is provided with a plurality of side planes matched with the dust-proof mirror, so that the dust-proof mirror can be attached and fixed on the outer end face of the light exit end of the diaphragm base body.
3. An iris diaphragm of claim 1, wherein the side plane is at an angle in the range of 1 degree to 8 degrees with respect to a perpendicular to the main optical axis.
4. An aperture according to claim 1, characterised in that the side plane is a sector plane or a triangular plane.
5. An aperture stop according to any one of claims 1 to 4, characterised in that the inner end surface of the available light exit end of the aperture base body is bevelled obliquely to the vertical plane of the main optical axis.
6. An aperture according to any one of claims 1 to 4, wherein the surface of the inner bore of the aperture base is roughened.
7. An aperture according to any one of claims 1 to 4, characterised in that the body of the aperture base is made of a heat-conducting material; and a layer of light absorption material is arranged on the surface of the inner hole of the main body of the diaphragm base body.
8. A diaphragm comprises a diaphragm base body and a dustproof mirror, and is characterized in that the dustproof mirror is provided with a light transmission hole which is light-transmitting and not through, and other parts of the dustproof mirror except the light transmission hole are light-tight parts;
the dustproof mirror is composed of a plurality of side planes, and the side planes are inclined to the vertical plane of the main optical axis;
the dust-proof mirror is fixed on the end face of the light-emitting end of the diaphragm base body.
9. An optical diaphragm according to claim 8, wherein the dust-proof mirror is recessed in the inner space of the cylindrical structure of the diaphragm base body or protruded from the inner space of the cylindrical structure of the diaphragm base body.
10. A laser comprising a light source circuit, a laser base and a diaphragm according to any one of claims 1 to 9; wherein the content of the first and second substances,
the diaphragm is arranged on the laser base;
an accommodating space for accommodating the light source circuit is arranged in the laser base in an extending manner;
the light source circuit is used for generating laser with preset wavelength in a preset laser propagation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374887.9U CN215641912U (en) | 2021-09-29 | 2021-09-29 | Diaphragm and laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374887.9U CN215641912U (en) | 2021-09-29 | 2021-09-29 | Diaphragm and laser |
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| Publication Number | Publication Date |
|---|---|
| CN215641912U true CN215641912U (en) | 2022-01-25 |
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| CN202122374887.9U Active CN215641912U (en) | 2021-09-29 | 2021-09-29 | Diaphragm and laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113835310A (en) * | 2021-09-29 | 2021-12-24 | 深圳市先地图像科技有限公司 | Diaphragm and laser |
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2021
- 2021-09-29 CN CN202122374887.9U patent/CN215641912U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113835310A (en) * | 2021-09-29 | 2021-12-24 | 深圳市先地图像科技有限公司 | Diaphragm and laser |
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