CN211293317U - Laser output lens for carbon dioxide laser - Google Patents
Laser output lens for carbon dioxide laser Download PDFInfo
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- CN211293317U CN211293317U CN201922382680.9U CN201922382680U CN211293317U CN 211293317 U CN211293317 U CN 211293317U CN 201922382680 U CN201922382680 U CN 201922382680U CN 211293317 U CN211293317 U CN 211293317U
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Abstract
The utility model discloses a laser output lens for carbon dioxide laser instrument, including lens substrate (1) and lens coating film layer (2), lens coating film layer (2) are the first coating film layer (21) of 5320nm 20nm by the thickness that sets gradually, second coating film layer (22) that thickness is 2913nm 10nm, third coating film layer (23) that thickness is 5320nm 20nm, fourth coating film layer (24) that thickness is 2913nm 10nm, fifth coating film layer (25) that thickness is 5320nm 20nm, sixth coating film layer (26) that thickness is 2430nm 8nm constitute, the gross thickness of lens coating film layer (2) is 24216nm 88 nm. The lens of the utility model can realize the oscillation starting and the output of laser with the wavelength of 9.6 mu m, and cut and process thin film materials; the thinner lens coating layer can reduce the loss of laser and improve the electro-optic conversion rate.
Description
Technical Field
The utility model belongs to the technical field of the optical lens piece technique and specifically relates to a can export specific wavelength laser, improve laser film cutting performance's a laser output lens for carbon dioxide laser.
Background
The laser wavelength output by the carbon dioxide laser is usually determined by a laser output mirror, an optical film layer is plated on the inner side of the laser output mirror, the laser resonant cavity can generate laser with various wavelengths in the initial stage of starting the laser, the laser can be emitted to the optical film layer of the laser output mirror, the optical lenses with different film layer structures can have higher reflectivity to the laser with corresponding specific wavelengths, for example, the existing laser output mirror generally has higher reflectivity to the laser with the wavelength of 10.6 μm, more laser with the wavelength of 10.6 μm can be reflected back to the resonant cavity in the initial stage of starting the laser, according to the laser generation principle, the reflected laser with the wavelength of 10.6 μm can excite a laser medium in the resonant cavity to generate more laser with the wavelength of 10.6 μm, when the power of the laser with the wavelength of 10.6 μm reaches an output threshold value, the laser beam can penetrate through the output mirror and be output out of the resonant cavity, realizing the oscillation starting and the output of laser with the wavelength of 10.6 mu m. Due to the longer wavelength of the 10.6 μm laser, the laser film cutting device has the defects of cutting impermeability, large laser loss and the like when used for cutting the laser film.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem that prior art exists, provide a can export specific wavelength laser, improve the laser marking clarity be used for the laser output lens of carbon dioxide laser, this laser output lens can export shorter wavelength laser and be used for the cutting of laser film to can reduce the laser loss.
The utility model aims at solving through the following technical scheme:
the utility model provides a laser output lens for carbon dioxide laser instrument, includes lens substrate and lens coating film layer, and lens coating film layer comprises according to the preface first coating film layer, second coating film layer, third coating film layer, fourth coating film layer, fifth coating film layer, sixth coating film layer that sets up, its characterized in that: the thickness of the first coating layer is 5320nm +/-20 nm, the thickness of the second coating layer is 2913nm +/-10 nm, the thickness of the third coating layer is 5320nm +/-20 nm, the thickness of the fourth coating layer is 2913nm +/-10 nm, the thickness of the fifth coating layer is 5320nm +/-20 nm, the thickness of the sixth coating layer is 2430nm +/-8 nm, and the total thickness of the lens coating layer is 24216nm +/-88 nm.
The first coating layer is made of yttrium fluoride, the second coating layer is made of zinc selenide, the third coating layer is made of yttrium fluoride, the fourth coating layer is made of zinc selenide, the fifth coating layer is made of yttrium fluoride, and the sixth coating layer is made of zinc selenide.
The lens base material is made of zinc selenide, and the thickness of the lens base material is 4mm-5 mm.
The optical lens formed by the lens coating layer and the lens base material can output laser with the wavelength of 9.6 mu m.
The optical lens formed by the lens coating layer and the lens base material has a transmittance of 12-13% to laser with a wavelength of 9.6 μm.
The optical lens formed by the lens coating layer and the lens base material has 66-67% of transmittance to laser with the wavelength of 10.6 mu m.
Compared with the prior art, the utility model has the following advantages:
the utility model discloses an optical lens piece can output wavelength 9.6 mu m's laser, there are more wavelength 9.6 mu m's laser to be reflected back to the resonant cavity by the laser output mirror at laser oscillation's initial stage after opening the laser instrument, make 9.6 mu m become the dominant wavelength, the excitation laser medium produces more wavelength 9.6 mu m's laser, when wavelength 9.6 mu m's laser power reaches the output threshold value, the laser beam pierces through the laser output mirror and exports outside the resonant cavity, realize the start oscillation and the output of wavelength 9.6 mu m laser, 9.6 mu m laser has shorter wavelength than 10.6 mu m laser, can cut film material and process.
The utility model discloses a laser output lens can output wavelength 9.6 mu m laser, common 10.6 mu m laser wavelength is shorter among the prior art, can cut processing to film material, the lens coating layer gross thickness of this laser output lens is about 24.2 mu m simultaneously, lens coating layer gross thickness 55.6 mu m-56.4 mu m among the prior art is thin, thinner lens coating layer can reduce the absorption loss to laser, the event adopts the optical lens of this lens coating layer structure can reduce the loss to laser, improve the electro-optical conversion rate of laser instrument.
Drawings
Fig. 1 is a schematic structural diagram of a laser output lens for a carbon dioxide laser according to the present invention;
FIG. 2 is a schematic view showing a partial enlargement of a lens coating layer of the laser output lens of the present invention.
Wherein: 1-a lens substrate; 2-lens film coating layer; 21-first coating layer; 22-second coating layer; 23-a third coating layer; 24-a fourth coating layer; 25-a fifth coating layer; 26-sixth coating layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1-2: a laser output lens for a carbon dioxide laser comprises a lens base material 1 and a lens coating layer 2, wherein the lens base material 1 is made of zinc selenide and has a thickness of 4-5 mm, the lens coating layer 2 is composed of a first coating layer 21, a second coating layer 22, a third coating layer 23, a fourth coating layer 24, a fifth coating layer 25 and a sixth coating layer 26 which are sequentially arranged on the lens base material 1, wherein the first coating layer 21 is made of yttrium fluoride, the second coating layer 22 is made of zinc selenide, the third coating layer 23 is made of yttrium fluoride, the fourth coating layer 24 is made of zinc selenide, the fifth coating layer 25 is made of yttrium fluoride, and the sixth coating layer 26 is made of zinc selenide; specifically, the thickness of the first coating layer 21 is 5320nm +/-20 nm, the thickness of the second coating layer 22 is 2913nm +/-10 nm, the thickness of the third coating layer 23 is 5320nm +/-20 nm, the thickness of the fourth coating layer 24 is 2913nm +/-10 nm, the thickness of the fifth coating layer 25 is 5320nm +/-20 nm, and the thickness of the sixth coating layer 26 is 2430nm +/-8 nm, so that the total thickness of the lens coating layer 2 is 24216nm +/-88 nm and about 24.2 mu m. The structure, material and thickness of the lens are shown in the table below.
| Lens structure | Material | Thickness of |
| A sixth film-coated layer | ZnSe | 2430nm±8nm |
| Fifth film coating layer | YbF3 | 5320nm±20nm |
| Fourth film coating layer | ZnSe | 2913nm±10nm |
| Third coating film layer | YbF3 | 5320nm±20nm |
| Second film coating layer | ZnSe | 2913nm±10nm |
| First coating film layer | YbF3 | 5320nm±20nm |
| Lens base material | ZnSe | 4mm-5mm |
The optical lens formed by the lens coating layer 2 and the lens base material 1 can output laser with the wavelength of 9.6 mu m, and the transmittance of the optical lens to the laser with the wavelength of 9.6 mu m is 12% -13%, so the optical lens can output the laser with the wavelength of 9.6 mu m after being used in a laser. And the laser output lens has 66% -67% of laser transmittance to the laser with the wavelength of 10.6 μm, so that the laser output lens has 54% lower transmittance to the laser with the wavelength of 9.6 μm than that of the laser with the wavelength of 10.6 μm, namely, the reflectivity is about 54% higher. After the laser is started, more laser with the wavelength of 9.6 microns is reflected back to the resonant cavity by the output mirror at the initial stage of laser oscillation, so that the laser with the wavelength of 9.6 microns becomes a dominant wavelength, a laser medium is excited to generate more laser with the wavelength of 9.6 microns, when the power of the laser with the wavelength of 9.6 microns reaches an output threshold value, a laser beam penetrates through an optical film layer on the output mirror and is output to the outside of the resonant cavity, the oscillation starting and the output of the laser with the wavelength of 9.6 microns are realized, the laser with the wavelength of 9.6 microns has a shorter wavelength than that of the laser with the wavelength of 10.6 microns, and the thin-film.
The utility model discloses a laser output lens can output wavelength 9.6 mu m laser, common 10.6 mu m laser wavelength is shorter among the prior art, can cut processing to film material, the lens coating layer gross thickness of this laser output lens is about 24.2 mu m simultaneously, lens coating layer gross thickness 55.6 mu m-56.4 mu m among the prior art is thin, thinner lens coating layer can reduce the absorption loss to laser, the event adopts the optical lens of this lens coating layer structure can reduce the loss to laser, improve the electro-optical conversion rate of laser instrument.
The above embodiments are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea provided by the present invention all fall within the protection scope of the present invention; the technology not related to the utility model can be realized by the prior art.
Claims (6)
1. The utility model provides a laser output lens for carbon dioxide laser instrument, includes lens substrate (1) and lens coating film layer (2), lens coating film layer (2) comprise its characterized in that by first coating film layer (21), second coating film layer (22), third coating film layer (23), fourth coating film layer (24), fifth coating film layer (25), sixth coating film layer (26) that set up according to the preface: the thickness of the first coating layer (21) is 5320nm +/-20 nm, the thickness of the second coating layer (22) is 2913nm +/-10 nm, the thickness of the third coating layer (23) is 5320nm +/-20 nm, the thickness of the fourth coating layer (24) is 2913nm +/-10 nm, the thickness of the fifth coating layer (25) is 5320nm +/-20 nm, the thickness of the sixth coating layer (26) is 2430nm +/-8 nm, and the total thickness of the lens coating layer (2) is 24216nm +/-88 nm.
2. The laser output optic for a carbon dioxide laser of claim 1, wherein: the first coating layer (21) is made of yttrium fluoride, the second coating layer (22) is made of zinc selenide, the third coating layer (23) is made of yttrium fluoride, the fourth coating layer (24) is made of zinc selenide, the fifth coating layer (25) is made of yttrium fluoride, and the sixth coating layer (26) is made of zinc selenide.
3. The laser output optic for a carbon dioxide laser of claim 1, wherein: the lens base material (1) is made of zinc selenide, and the thickness of the lens base material (1) is 4-5 mm.
4. The laser output optic for a carbon dioxide laser of claim 1, wherein: the optical lens formed by the lens coating layer (2) and the lens base material (1) can output laser with the wavelength of 9.6 mu m.
5. The laser output optic for a carbon dioxide laser of claim 1, wherein: the optical lens formed by the lens coating layer (2) and the lens base material (1) has a laser transmittance of 12-13% to a wavelength of 9.6 μm.
6. The laser output optic for a carbon dioxide laser of claim 1, wherein: the optical lens formed by the lens coating layer (2) and the lens base material (1) has 66-67% of laser transmittance at the wavelength of 10.6 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922382680.9U CN211293317U (en) | 2019-12-26 | 2019-12-26 | Laser output lens for carbon dioxide laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922382680.9U CN211293317U (en) | 2019-12-26 | 2019-12-26 | Laser output lens for carbon dioxide laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211293317U true CN211293317U (en) | 2020-08-18 |
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ID=72038467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922382680.9U Active CN211293317U (en) | 2019-12-26 | 2019-12-26 | Laser output lens for carbon dioxide laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211293317U (en) |
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2019
- 2019-12-26 CN CN201922382680.9U patent/CN211293317U/en active Active
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