CN2305795Y - Laser reflector having abrupt reflectivity - Google Patents
Laser reflector having abrupt reflectivity Download PDFInfo
- Publication number
- CN2305795Y CN2305795Y CN 97224910 CN97224910U CN2305795Y CN 2305795 Y CN2305795 Y CN 2305795Y CN 97224910 CN97224910 CN 97224910 CN 97224910 U CN97224910 U CN 97224910U CN 2305795 Y CN2305795 Y CN 2305795Y
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- reflectivity
- district
- sudden change
- internal reflection
- laser mirror
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Abstract
The utility model relates to a laser reflector having an abrupt reflectivity, which is composed of a substrate and a reflecting region, wherein the reflecting region is divided into an internal reflecting region and an external reflecting region which have different reflectivity; the reflectivity of the internal reflection region is less than that of the external reflection region; the shape of the reflecting region can be various regular geometric figures; the reflecting region is made on the substrate by adopting self characteristics of plated film and optical elements or adopting methods of direct gold processing, etc. The reflector is utilized to control the output mode and beam quality of a laser and is suitable for various types of lasers.
Description
The present invention relates to a kind of speculum that is used for laserresonator.
Speculum is a main element of forming laserresonator, and the power of Laser Output Beam, pattern and beam quality are mainly determined by speculum.Existing laser mirror mainly contains two classes, and a class is the speculum of even reflectivity, exports Gaussian beam, Ermy-Gaussian beam or Laguerre-Gaussian beam by the resonant cavity that this class speculum constitutes when constraint is stablized; Output spherical wave when unconfinement is stablized.Another kind of is the speculum with gradual change reflectivity, and the functional form major part of gradual change is a Gaussian, and its output beam is a Gaussian mode.The speculum of gradual change reflectivity can be exported basic mode, but making is difficult, the power output reduction is more, just can not adapt to when the special light distribution of needs.
It is simple and convenient to the purpose of this invention is to provide a kind of making, and power output reduces less, can export the laser mirror of the special light beam of particular requirement light distribution.
Laser mirror with sudden change reflectivity provided by the invention is made of substrate and echo area, and described echo area is divided into internal reflection district and external reflectance district, and two echo areas have different reflectivity, and the reflectivity in internal reflection district is less than the reflectivity in external reflectance district.The geometry in internal reflection district can be circle, ellipse, square, rectangle or other regular shapes, and the geometry in external reflectance district can be annular, oval ring, square frame shape, square shaped as frame or similar regular shape.Described laser mirror is according to the specific requirement of various types of lasers, the present invention can adopt that dielectric substance, metal material or semi-conducting material that transmitted spectrum or reflectance spectrum are satisfied corresponding optical maser wavelength overlap on substrate that plating, photoetching, ion are carved, deposition, corrosion, directly metalworking or utilize a kind of method of optical element self-characteristic or several method makings that combine forms the laser mirror with the reflectivity that suddenlys change.
Laser mirror of the present invention is according to the zlasing mode control principle, and two echo areas have different reflectivity, and sudden change is arranged on the border, and the reflectivity size of two echo areas is selected coupling by the gain coefficient and the required light distribution of laser medium.The reflectivity in internal reflection district makes laser beam mainly export from the internal reflection district less than the reflectivity in external reflectance district.Reflectivity by adjusting two echo areas and geometry, size just can obtain the output of various light distribution.
Laser mirror of the present invention is suitable for various types of lasers, can be used as the outgoing mirror of laser, also can place in the laser cavity.Owing to there is sudden change on the border, echo area of laser mirror provided by the invention, thereby technology is simpler than the speculum of gradual change reflectivity when making.The reflectivity by adjusting two echo areas and the geometry and the size of echo area just can realize the light beam of various specific (special) requirements, such as material cutting, punching, material welding, heat treatment etc.So laser mirror adaptability provided by the invention is strong, the application face width, and can obviously not reduce power output.
Description of drawings:
Fig. 1 is the suddenly change structural representation of reflectivity laser mirror of the present invention, and 1 is the internal reflection district, and 2 is the external reflectance district.
Cavity resonator structure schematic diagram when Fig. 2 is used as the laser cavity outgoing mirror for sudden change reflectivity laser mirror, 3 are sudden change reflectivity laser mirror, and 4 is laserresonator, and 5 is resonant cavity tail mirror.
Cavity resonator structure schematic diagram when Fig. 3 places in the resonant cavity for sudden change reflectivity laser mirror, 6 is the resonant cavity outgoing mirror.
Below in conjunction with accompanying drawing embodiments of the invention are described in detail.
Embodiment 1: referring to accompanying drawing 1, the laser mirror that present embodiment provides is made of substrate and echo area, and 1 is the injection district, and 2 is the external reflectance district, and the reflectivity in internal reflection district 1 is 0≤R
1＜100%, the reflectivity in external reflectance district 2 is 0＜R
2≤ 100%, the geometry in internal reflection district is a kind of of circular, oval, square, rectangle, and the geometry in external reflectance district can should be a kind of of annular, oval ring, square frame shape, square shaped as frame mutually.Speculum can adopt the method for plated film or directly metalworking to be prepared from.
Embodiment 2: referring to accompanying drawing 2, the laser mirror that present embodiment provides is as CO
2The outgoing mirror of laser.The reflectivity in the internal reflection district of this speculum is 40%-85%, and geometry is circular, and diameter is the 6-20 millimeter, and the reflectivity in external reflectance district is 95%-100%, and geometry is an annular, and the inner and outer diameter of annulus is respectively 6-20 millimeter and 6-50 millimeter.The reflectivity in internal reflection district can be controlled with the plating multilayer dielectric film, and the reflectivity in external reflectance district can add the method for plating deielectric-coating with metal-coated membrane to be realized.Be equipped with suitable tail mirror.The laser beam that the laser that present embodiment provides produces is suitable for laser welding and cutting usefulness, and caused power loss is less than 10%.
Embodiment 3: referring to Fig. 3, sudden change reflectivity laser mirror is used for solid batten laser, and the position is put in the chamber.The reflectivity in the internal reflection district of this sudden change reflectivity mirrors is 0+ δ, is the clear area, and geometry is a rectangle, and the reflectivity in external reflectance district is 100%-δ, is shaped as the square shaped as frame, and wherein δ is micro-correction value.
Claims (6)
- One kind have the sudden change reflectivity laser mirror, constitute by substrate and echo area, it is characterized in that described echo area is divided into internal reflection district (1) and external reflectance district (2), two echo areas have different reflectivity, and the reflectivity of internal reflection district (1) is less than the reflectivity of external reflectance district (2).
- 2. sudden change reflectivity laser mirror according to claim 1, the geometry that it is characterized in that described internal reflection district (1) is a kind of for circular, oval, square, rectangle, and the geometry in described external reflectance district (2) should be a kind of of annular, oval ring, square frame shape, square shaped as frame mutually.
- 3. sudden change reflectivity laser mirror according to claim 1 is characterized in that the reflectivity R in internal reflection district 1Satisfy 0≤R 1＜100%.
- 4. sudden change reflectivity laser mirror according to claim 3, the reflectivity that it is characterized in that described internal reflection district is 0+ δ, is the full impregnated area pellucida, δ is micro-correction value.
- 5. sudden change reflectivity laser mirror according to claim 1 is characterized in that the reflectivity R in described external reflectance district 2Satisfy 0＜R 2≤ 100%.
- 6. sudden change reflectivity laser mirror according to claim 5, the reflectivity that it is characterized in that the external reflectance district is 100%-δ, is the total reflection district, δ is micro-correction value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224910 CN2305795Y (en) | 1997-08-22 | 1997-08-22 | Laser reflector having abrupt reflectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224910 CN2305795Y (en) | 1997-08-22 | 1997-08-22 | Laser reflector having abrupt reflectivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2305795Y true CN2305795Y (en) | 1999-01-27 |
Family
ID=33939102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97224910 Expired - Fee Related CN2305795Y (en) | 1997-08-22 | 1997-08-22 | Laser reflector having abrupt reflectivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2305795Y (en) |
-
1997
- 1997-08-22 CN CN 97224910 patent/CN2305795Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |