CN2585265Y - Scanning type area light source used for laser video frequency display - Google Patents
Scanning type area light source used for laser video frequency display Download PDFInfo
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- CN2585265Y CN2585265Y CN 02251313 CN02251313U CN2585265Y CN 2585265 Y CN2585265 Y CN 2585265Y CN 02251313 CN02251313 CN 02251313 CN 02251313 U CN02251313 U CN 02251313U CN 2585265 Y CN2585265 Y CN 2585265Y
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Abstract
The utility model belongs to the display field of the laser and the laser video, and relates to a scanning-type area light source. Fine light beams are irradiated to a high-speed and rotary manifold reflecting mirror by the utility model. Because each reflecting surface of a tilting mirror is provided with a fixed inclination angle along a rotary shaft direction, scanning light beams form two-dimensional area scanning on a scanned area. An even bright area is formed by adopting a scanning mode, and because the bright area is composed of bright points, each bright point arrives in turn to an irradiated area according to different times, and then the time coherence of coherent light is not satisfied. Therefore, the formed bright area has no coherent stripe. The utility model provides a method which is completely different from the present beam-expanding technique; namely, the scanning method is adopted to realize the even illumination of an area-array space light modulator in laser display, so a laser-scanning area light source with high light energy utilization rate and even illuminance is obtained, and the area light source is used for eliminating interference. The utility model has the scanning characteristics that each scanning point can cover lots of pixels, and each scanning line has major parts of overlapping to ensure the brightness of the scanning area to be even.
Description
Technical field: the utility model belongs to laser and laser video shows the field, relate to laser beam expanding and the photoscanning technology that to eliminate laser interference, the scanning type area light that is used for the laser video demonstration that specifically a kind of brightness evenly, nothing is interfered, the efficiency of light energy utilization is high.
Background technology: laser beam expander is a device commonly used in the laser application, its objective is that the light pencil with laser is extended to the area source of go-no-go.Usually adopting parallel light tube is telescopic system.
The parallel light tube beam expander comprises condenser, Guang Lan hole, collimation lens etc.Its structure is that the back focus of condenser overlaps with the front focus of collimation lens, and lays Yi Guanglan in bifocal coincidence place, to improve the collimation of emergent light.Its course of work is: the laser beam process condenser by laser instrument sends converges on the back focus of condenser.This focus is again the front focus of collimation lens, through directive collimation lens behind the light hurdle at this focus place, forms the parallel light emergence that expands bundle behind collimation lens.This structure has realized the collimator and extender of laser, and it is that present laser alignment expands the bundle common structure.But it is a kind of coherent light that this beam expander expands the laser beam that, and needs can not meet the demands under the situation of incoherent light at those, must seek a kind of new beam expander.For example, in the laser display mode of employing face battle array spatial light modulator, require the noncoherent lasing area light source of a kind of even brightness, otherwise, because the interference effect of laser can make on the image of demonstration and be superimposed with stronger background interference clause, has a strong impact on imaging effect.On the other hand, this beam expander expands the light beam that, the Luminance Distribution of its xsect is uneven, is Gaussian distribution.Therefore, must eliminate the coherence of laser, and guarantee that the light distribution of light beam irradiates face is uniform.
In prior art, the photoscanning technology is used for scanned imagery, rather than is used to produce the equally distributed area source of brightness.Its feature is that analyzing spot is discrete each other, and each analyzing spot is all represented a pixel.For example the photoscanning in laser printer, laser photocomposing machine all belongs to scanned imagery.
Summary of the invention: coherence and the brightness irregularities problem of the utility model in order to overcome light beam in the laser display mode, adopt the scanning of method for scanning realization to face battle array spatial light modulation in the laser display, purpose provides a kind of scanning type area light that laser video shows that is used for.
In laser video showed, LASER Light Source was one of essential parts, also is the determinative of video display resolution and brightness.Because common laser beam expander does not have all even function that disappears and interfere of brightness, therefore can't be directly used in face battle array light valve type laser video and show.In order to solve coherence and the brightness irregularities problem that expands bundle back light beam in the prior art, the utility model proposes the diverse method of a kind of and existing beam expanding technology, promptly adopt method for scanning to realize even illumination to face battle array spatial light modulator in the laser display, obtain a kind of efficiency of light energy utilization height, illumination evenly, the laser scanning area source that disappears and interfere.Its scanning characteristics are that each analyzing spot can cover a lot of pixels, and every sweep trace will have the overlapping of major part, and are even with the brightness of guaranteeing scanning plane.
Beam flying is exactly that light pencil is shone on the polygonal mirror of a high speed rotating, because the rotation of polygonal mirror makes folded light beam be scanned into straight line, can realize the face scanning of bidimensional again through the scanning of vertical dimension.In the utility model, level scans with vertical bidimensional, only finishes with a tilting mirror, has saved the galvanometer or the pendulum mirror of vertical direction.Realize bidimensional scanning simultaneously with a tilting mirror, be by with each minute surface of multiple surface rotating mirror successively at the rotor shaft direction certain angle that tilts, after revolution is crossed a face like this, because the certain angle of the current relatively deflection mirror surface of next minute surface, make the sweep trace line down.
According to the interference of light principle, when two bundle coherent lights arrived face to be illuminated with difference timesharing constantly, if when the time interval that they successively arrive exceeds coherence time, they just can not produce interference on face to be illuminated.The utility model adopts method for scanning, allows luminous point scanning fast on face to be illuminated, and the persistence of vision that surpasses human eye when sweep velocity is during again greater than coherence time, and human eye can be seen one constant bright.This bright face is made up of bright spot one by one, and between each point owing to be that timesharing occurs, so just eliminated coherence each other, make face to be illuminated interference fringe can not occur.In addition, the light distribution of the xsect of single scanning light beam is normally uneven, distributes according to certain rules, as Gaussian distribution.Can carry out the stack of light intensity with different degrees of overlapping and calculate according to its light distribution.When the stack result of light intensity is a steady state value, less than 1%, can determine the degree of overlapping of the degree of overlapping of this moment as light intensity fluctuation as sweep trace, can obtain brightness face to be illuminated very uniformly thus.Thisly directly scan face to be illuminated with laser beam, make the laser energy loss near minimum, its capacity usage ratio is more than other beam expander height.
In order more clearly to express the utility model, further describe the technical solution of the utility model below in conjunction with accompanying drawing.
What accompanying drawing 1 was represented is the synoptic diagram of technical solutions of the utility model.The utility model mainly comprises laser instrument 1, multiple surface rotating mirror 3 and display screen 6.Multiple surface rotating mirror 3 is to be the polyhedron of axis with axle 5, and each side is catoptron 4.Between the face of the adjacent mirror 4 of multiple surface rotating mirror 3 sides successively along axle angle of axioversion of 5.Overlooking as shown in Figure 2 along axle 5 axial institute angles of inclination between 4 of the arrangement of multiple surface rotating mirror 3 lateral reflector 4 and the catoptrons.The scanning process of multiple surface rotating mirror 3 as shown in Figure 1, the laser beam 2 that laser instrument 1 sends is through multiple surface rotating mirror 3 scanning in line 7, since between 4 of the adjacent mirror of multiple surface rotating mirror 3 successively along the axioversion certain angle of axle 5, this makes scanning straight line 7 go up successively or line down, thereby forms the one scan face.
This scanning mirror minute surface certain angle that tilts has vertically successively each other been removed the field scan mirror from, and system architecture is further simplified.
Description of drawings:
Fig. 1 is a synoptic diagram of the present utility model, also is the specification digest accompanying drawing;
Fig. 2 is the vertical view of the utility model scanning mirror 3.
Embodiment:
The minute surface number of the catoptron 4 of multiple surface rotating mirror 3 can be designed to the even number face, as 40.In the minute surface of preceding 1～20 catoptron 4, the minute surface of each catoptron 4 relatively axial angle of axle 5 increases one by one, increases by 8 fens as the minute surface of each catoptron 4.Since the minute surface of the 21st catoptron 4,21～40 minute surface reduces same angle one by one, and as 8 minutes, the catoptron 4 of multiple surface rotating mirror 3 formed left-right symmetric like this.During scanning, in 4 minute surface scan periods of catoptron of preceding 1～20 multiple surface rotating mirror 3, the minute surface of every catoptron 4 through a multiple surface rotating mirror 3, scanning straight line 7 moves down 8 fens angle, and corresponding this angle line down during to the 20th face, moves down 20 row.From the 21st row, the minute surface of a catoptron 4 of revolution moves delegation on the scanning straight line 7, up to the 40th row, is total to and moves 20 row.As seen, multiple surface rotating mirror 3 whenever turns around and has promptly finished once up and down reciprocatingly scanning.How much overlapping scanning straight line 7 is, promptly shields 6 distance dependent with multiple surface rotating mirror 3 to scanning plane, relevant with scanning light beam xsect size, also relevant with the incline towards each other size at angle of the minute surface of each catoptron 4, and this will decide according to the size of degree of overlapping.
Claims (4)
1, a kind of scanning type area light that is used for the laser video demonstration, comprise laser instrument (1), tilting mirror (3), it is characterized in that laser beam (2) that laser instrument (1) sends shines the multiple surface rotating mirror (3) of a high speed rotating, each reflecting surface (4) rotating shaft toward each other (5) deflection certain angle of multiple surface rotating mirror (3), each face makes folded light beam be scanned into straight line (7), revolution is crossed a face, and sweep trace translation delegation forms scanning plane with sweep trace translation successively.
2, the scanning type area light that is used for the laser video demonstration according to claim 1, the multiple surface rotating mirror (3) that it is characterized in that high speed rotating is to be centrosymmetric polygon with axle (5), each face all is mirror surface (4), reflecting surface (4) certain angle that inclines towards each other vertically.
3, the scanning type area light that is used for the laser video demonstration according to claim 2, the minute surface several 40 that it is characterized in that the catoptron (4) that multiple surface rotating mirror (3) is upward arranged, in the minute surface of preceding 1～20 catoptron (4), the minute surface of each catoptron (4) is angle of axial increase of axle (5) relatively; Since the minute surface of the 21st catoptron (4), 21～40 minute surface reduces same angle one by one, and the polygonal mirror 4 on the multiple surface rotating mirror (3) has formed left-right symmetric like this; During scanning, in catoptron (4) the minute surface scan period of preceding 1～20 scanning mirror (3), revolution is crossed the minute surface of a catoptron (4), and sweep trace (7) moves down an angle, corresponding this angle line down, during to the 20th face, move down 20 row, from the 21st row, revolution is crossed the minute surface of a catoptron (4), move delegation on the scanning straight line (7), up to the 20th row; Multiple surface rotating mirror (3) whenever turns around and has promptly finished once up and down reciprocatingly scanning.
4, according to claim 1 or the 2 or 3 described scanning type area lights that are used for the laser video demonstration, how much overlapping it is characterized in that scanning straight line (7), promptly shield the distance dependent of (6) to scanning plane with multiple surface rotating mirror (3), relevant with the scanning light beam cross-sectional sizes, also relevant with the incline towards each other size of angle of each mirror surface (4), this will decide according to the size of degree of overlapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251313 CN2585265Y (en) | 2002-12-12 | 2002-12-12 | Scanning type area light source used for laser video frequency display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251313 CN2585265Y (en) | 2002-12-12 | 2002-12-12 | Scanning type area light source used for laser video frequency display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2585265Y true CN2585265Y (en) | 2003-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02251313 Expired - Fee Related CN2585265Y (en) | 2002-12-12 | 2002-12-12 | Scanning type area light source used for laser video frequency display |
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| Country | Link |
|---|---|
| CN (1) | CN2585265Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334480C (en) * | 2004-07-16 | 2007-08-29 | 中国科学院物理研究所 | Laser color display device possessing three primary colors of red, green and blue |
| CN100346191C (en) * | 2006-01-18 | 2007-10-31 | 河北工业大学 | Rotating mirror device with curved surface for laser scanner |
| CN100465687C (en) * | 2003-11-24 | 2009-03-04 | 杰斯集团公司 | Mirror mounting structures for scanners employing limited rotation motors |
| CN106405829A (en) * | 2016-11-23 | 2017-02-15 | 青岛小优智能科技有限公司 | Laser structure light 3D imaging method |
| CN106903301A (en) * | 2017-01-11 | 2017-06-30 | 上海理工大学 | Nanoparticle size control method and realize device |
| CN109725299A (en) * | 2017-10-31 | 2019-05-07 | 北京北科天绘科技有限公司 | A kind of laser scanning device, radar installations and its scan method |
| WO2021143665A1 (en) * | 2020-01-14 | 2021-07-22 | 深圳市镭神智能***有限公司 | Prism and multi-line lidar |
-
2002
- 2002-12-12 CN CN 02251313 patent/CN2585265Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465687C (en) * | 2003-11-24 | 2009-03-04 | 杰斯集团公司 | Mirror mounting structures for scanners employing limited rotation motors |
| CN100334480C (en) * | 2004-07-16 | 2007-08-29 | 中国科学院物理研究所 | Laser color display device possessing three primary colors of red, green and blue |
| CN100346191C (en) * | 2006-01-18 | 2007-10-31 | 河北工业大学 | Rotating mirror device with curved surface for laser scanner |
| CN106405829A (en) * | 2016-11-23 | 2017-02-15 | 青岛小优智能科技有限公司 | Laser structure light 3D imaging method |
| CN106903301A (en) * | 2017-01-11 | 2017-06-30 | 上海理工大学 | Nanoparticle size control method and realize device |
| CN109725299A (en) * | 2017-10-31 | 2019-05-07 | 北京北科天绘科技有限公司 | A kind of laser scanning device, radar installations and its scan method |
| CN109725299B (en) * | 2017-10-31 | 2024-04-19 | 北京北科天绘科技有限公司 | Laser scanning device, radar device and scanning method thereof |
| WO2021143665A1 (en) * | 2020-01-14 | 2021-07-22 | 深圳市镭神智能***有限公司 | Prism and multi-line lidar |
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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 |