CN1224855C - Optical deflector capable of completing field scanning and line scanning at one time as well as device for projecting image with large area - Google Patents
Optical deflector capable of completing field scanning and line scanning at one time as well as device for projecting image with large area Download PDFInfo
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- CN1224855C CN1224855C CN 02145513 CN02145513A CN1224855C CN 1224855 C CN1224855 C CN 1224855C CN 02145513 CN02145513 CN 02145513 CN 02145513 A CN02145513 A CN 02145513A CN 1224855 C CN1224855 C CN 1224855C
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- mirror
- angle
- mirror surface
- drum
- picture
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Abstract
The present invention relates to an optical deflector capable of completing field scanning and line scanning at one time. The present invention is composed of a polyhedral mirror drum provided with a plurality of reflecting mirror faces; each reflecting mirror face has a tilted included angle with the axial lead of the mirror drum; the angle value of a plurality of included angles forms an arithmetic progression. A projection device for a picture of large image scale, which is manufactured with the optical deflector, comprises an emission source of an optical beam, an optical deflector and a processing circuit for picture information, wherein with the optical deflector, the primary reflection of the optical beam is formed into field scanning and line scanning. The optical deflector can complete the field scanning and the line scanning at one time, and thus, the present invention solves the problem of the synchronization of field mirror drums and line mirror drums and reduces requirements to motor speed; particularly, when laser is used as an optical source, the present invention can use a plurality of cheap laser devices with small power, and thus, manufacturing cost is greatly reduced. With the device, pictures can projected on walls or diffuse reflecting screens which are specially provided; the present invention is used for the purposes of advertisement or demonstration and the projection of stage background pictures, and the present invention can be used as a colored laser projection television.
Description
Technical field
The invention belongs to a kind of image projection equipment that utilizes the preparation of beam flying principle, particularly relate to a kind of picture of large image scale projection equipment that once can finish the light deflector of field scan and line scanning and use this kind light deflector.
Technical background
Come out soon in laser technology, just the someone has proposed to make laser beam in succession by two reflective polygon prism reflections of rotation that are called " multiaspect mirror drum ", realize the large screen projection displaying scheme, this scheme has a multiaspect mirror drum and a multiaspect mirror drum of finishing line scanning of finishing field scan, row mirror drum revolution is crossed a minute surface and is equivalent to scan delegation, field lens drum revolution is crossed a minute surface and is equivalent to scan one, and these two mirror drums cooperate continuous rotation can form raster.When the multiaspect mirror drum of line scanning is 16, reach the image effect of common TV, its rotating speed needs per minute to reach 60,000 commentaries on classics, and requirement has very high stability, simultaneously field lens drum and row mirror drum also will keep very strict synchronous the cooperation between the two, otherwise will make image fault even can't display image.Just quite high to the requirement of motor like this, need make manufacturing cost very high to the complicated servo circuit of its configuration, can't implement so far.
Summary of the invention
The present invention seeks to propose a kind of light deflector that once can finish field scan and line scanning, the visual projection equipment that has used this light deflector is provided simultaneously.
Specifically, a kind of light deflector of once finishing field scan and line scanning, be to be made of the polyhedron mirror drum with a plurality of mirror surfaces, and each mirror surface all has the angle of an inclination with the axial line of mirror drum, these a plurality of angle angle values become an arithmetic progression.
Also a plurality of mirror surfaces can be divided into a
1, a
2, a
3, a
4... a
nAnd b
1, b
2, b
3, b
4... b
nTwo groups, lay respectively at the both sides of mirror drum, a plurality of mirror surface a
1, a
2, a
3, a
4... a
nChange successively with the angle of mirror drum axial line and angle value becomes an arithmetic progression, be positioned at a plurality of mirror surface b of another side simultaneously
1, b
2, b
3, b
4... b
nAlso change successively with the angle of mirror drum axial line and angle value constitute one with the identical arithmetic progression of aforementioned arithmetic progression tolerance, and the first mirror surface a that organizes of a
1First mirror surface b with the b group
1The angle of both and mirror drum axial line is the phase difference of half tolerance value numerically.
(when being one for the light emitted device) each minute surface can be finished a line scanning when this light deflector rotated, because the angle of adjacent two catoptrons and mirror drum axial line has a differential seat angle, then the light deflector horizontal scanning line that each mirror surface finishes that rotates a circle does not all overlap, thereby forms the cluster grating.Use N radiation beam source to distribute and to form continuously arranged N bunch grating by certain angle.Like this, a light deflector has just been finished field scan when carrying out line scanning, and owing to differential seat angle between each catoptron is identical, formed grating also is uniform.
A plurality of mirror surfaces can adopt catoptron to be fixed on the mirror drum side, also can be ground that polishing constitutes or are made with the die casting technologies such as applying reflectorized material again that is shaped by the mirror drum side.
Mirror drum can be cylindrical polyhedron or conical polyhedron.Catoptron is that the mode of arithmetic progression is positioned on cylinder surface or the circular cone dignity according to the angle value that forms angle with axial line.
A kind of picture of large image scale projection equipment that utilizes above-mentioned light deflector to make, it comprises: radiation beam source 2; The light beam primary event is formed the light deflector 1 of field scan and line scanning; Image information processing circuit 7.Utilize this equipment, the picture signal projection of treatment circuit input can be reproduced on the diffuse surface, this diffuse surface can be wall or the screen that provides especially, is used for the projector of advertisement or demonstration purpose or uses as laser projection tv.
The diffuse reflection that provides an especially screen 6 that forms image also can be provided the said equipment.Like this, just can constitute a projection equipment.
Between radiation beam source 2 and light deflector 1, be provided with catoptron 9.
The cylindrical lens that can change the picture depth-width ratio is housed between mirror drum and diffuse surface.By this cylindrical lens, can obtain the different picture of depth-width ratio specification, as 3: 4 or 6: 9 etc.
Described radiation beam source 2 comprises that ordinary light source, infrared ray, ultraviolet ray, laser etc. can preferentially be recommended as laser instrument by the multiple light source of direct reflection.Because the directivity of laser is good especially and brightness is high; Has the stable advantage clearly of imaging.But under some specific uses, infrared ray or ultraviolet ray also can reach special-effect.
Radiation beam source can be one or many, but fan-shaped array, word order or be staggered many time.When radiation beam source 2 adopts red (R), green (G), when blue (B) tricolor laser device synthesizes color laser, at the preceding dichronic mirror (4b, 4c) that is provided with of laser instrument (3b, 3c), synthesizes a branch of modulated color laser with laser instrument 3a.
Advantage of the present invention is that a light deflector can once be finished field scan and line scanning, has thoroughly solved the stationary problem of field lens drum with the row mirror drum, also line scanning electric rotating machine rotating speed is required to be reduced to several thousand commentaries on classics by per minute several ten thousand commentaries on classics.It is simple in structure to adopt the image projection equipment of this light deflector to have simultaneously, and the advantage that picture steadiness is good particularly when adopting laser to make light source, can be used the low-power laser of many cheapnesss, low cost of manufacture is more arranged, the characteristics of being convenient to implement.
Description of drawings
Fig. 1 is the structural drawing of light deflector of the present invention.
Fig. 2 is the schematic diagram (elevation drawing of embodiment 2) of image projection equipment of the present invention.
Fig. 3 is the outboard profile of light deflector of the present invention.
Fig. 4 is capable, the field scan principle schematic (cylindrical mirror drum) of light deflector of the present invention.
Fig. 5 is capable, the field scan principle schematic (conical mirror drum) of light deflector of the present invention.
Fig. 6 is the circuit theory diagrams of image projection equipment of the present invention.
Fig. 7 is the schematic diagram (planimetric map of embodiment 4) of image projection equipment of the present invention.
Embodiment
Embodiment 1: a kind of light deflector of once finishing field scan and line scanning, be to constitute, a plurality of mirror surfaces evenly are arranged on the mirror drum periphery according to the mode that the angle value with the mirror drum axial line constitutes arithmetic progression by polyhedron mirror drum with a plurality of mirror surfaces.Mirror drum is cylindrical, and mirror surface is directly to be made by the processing polishing of mirror drum side.Mirror drum is established 30 reflectings surface altogether, and two maximum inclination minute surfaces are (as a
1And b
n) with respect to mirror drum axial line angle be respectively+2o and-2o (promptly differing 4o), promptly every of 30 catoptron all increases progressively (or successively decreasing) by the tolerance of 4o/30 and is distributed on the mirror drum periphery.Each bunch grating that this light deflector forms is for lining by line scan.
Embodiment 2: a kind of picture of large image scale projection equipment that utilizes embodiment 1 described light deflector to make comprises: radiation beam source 2; The light beam primary event is formed the light deflector 1 of field scan and line scanning; Image information processing circuit 7.Also has a diffuse reflection screen 6 that forms image.Radiation beam source 2 is by red (R), green (G), the synthetic color laser of blue (B) tricolor laser device, wherein 3a is that red (R) laser instrument, 3c are that green (G) laser instrument, 3b are blue (B) laser instrument, at the preceding dichronic mirror (4b, 4c) that is provided with of laser instrument (3b, 3c), before laser instrument 3a, be provided with catoptron 4a.Be provided with electrooptic modulator (5) before each laser instrument.Synthetic color laser is through two lens bundle that contracts.Such radiation beam source has 15, and is the 60o angle directive light deflector that evenly distributes.The scanning linear that reflection is strafed out is done vertical scanning projection, and it vertically scans angle is α
2Be 360o*2/30=24o, the grating horizontal sextant angle is α
1=60o forms depth-width ratio and is 1: 2.5 picture, and light deflector is with 3000 rev/mins rotating speed rotation, promptly 50 revolutions per seconds, can realize the picture of 50 frame/seconds, every bunch 30 line (vertically scanning), 1.5 bunches of totally 450 lines.Vertical pixel is 360 points, is provided by control circuit 7, forms the scanning picture of 480*360=172800 pixel.Be used for the projection (its principle as shown in Figure 2) of advertisement or demonstration purpose and stage background image.
The circuit of this image projection equipment is controlled to be prior art, its typical circuit schematic diagram as shown in Figure 6, the CPU of picture signal input equipment, being input to light source after signal processing circuit is with signal conversion processes distributes in the driving circuit, drive the modulator of each radiation beam source more respectively, light deflector reflexes to the diffuse reflection screen with modulated chromatic image beam and goes up the formation image.
Embodiment 3: a kind of light deflector of once finishing field scan and line scanning is to be made of the polyhedron mirror drum with a plurality of mirror surfaces, and a plurality of mirror surfaces are divided into a
1, a
2, a
3, a
4... a
nAnd b
1, b
2, b
3, b
4... b
nTwo groups, lay respectively at the both sides of mirror drum, a plurality of mirror surface a
1, a
2, a
3, a
4... a
nReduce (or increase) and angle value with the angle of mirror drum axial line successively and become an arithmetic progression, be positioned at a plurality of mirror surface b of another side simultaneously
1, b
2, b
3, b
4... b
nAlso reduce (or increase) and angle value with the angle of mirror drum axial line successively and constitute the arithmetic progression that has same tolerances with a group mirror surface.And the first mirror surface a of a group
1First mirror surface b with the b group
1The angle of both and mirror drum axial line is the phase difference of half tolerance value numerically.Mirror drum is a right cylinder, and mirror surface is directly to be made by the polishing of mirror drum side.Mirror drum is established 30 mirror surfaces, two groups each 15 of a, b, and all the tolerance according to 4o/15 increases progressively (or successively decreasing), and is distributed on the mirror drum periphery.Each bunch grating that this light deflector forms is staggered scanning.
Embodiment 4: a kind of picture of large image scale projection equipment that utilizes embodiment 3 described light deflectors to make comprises: radiation beam source 2; The light beam primary event is formed the light deflector 1 of field scan and line scanning; Catoptron 9 between radiation beam source and light deflector, image information processing circuit 7.Also has a diffuse surface 6 that forms image.Radiation beam source 2 is by red (R), green (G), the synthetic color laser of blue (B) tricolor laser device, wherein 3a is that red (R) laser instrument, 3c are that green (G) laser instrument, 3b are blue (B) laser instrument, at the preceding dichronic mirror (4b, 4c) that is provided with of laser instrument (3b, 3c), before laser instrument 3a, be provided with catoptron 4a.Be provided with electrooptic modulator 5 before each laser instrument.Synthetic color laser is through two lens bundle that contracts.Such radiation beam source has 15, and is the uniform toward mirror 9 of 18o angle, forms the angle directive light deflector 1 of 18o through mirror reflects.Do laterally (level) scanning projection through the sweep trace that the light deflector reflective scan goes out, it is (level) scanning angle α laterally
1Be 18o, pixel is provided the vertical angle α of grating by 720 designs by control circuit 7
2Be 3600*2/30=240, the formation depth-width ratio is 3: 4 a picture, light deflector rotates with 1500 rev/mins rotating speed, promptly 25 revolutions per seconds, staggered scanning can realize the picture of 50 frame/seconds, every bunch 30 line (horizontal interlace), 15 bunches of totally 450 lines, form the scanning picture of 720*450=324000 pixel, be used for the color laser television projection, its schematic diagram as shown in Figure 7.The circuit diagram that is used to control belongs to prior art as shown in Figure 6, and the present invention does not provide one by one.
Claims (9)
1, a kind of light deflector of once finishing field scan and line scanning, it is characterized in that constituting by polyhedron mirror drum with a plurality of mirror surfaces, and each mirror surface all has the angle of an inclination with the axial line of mirror drum, and these a plurality of angle angle values become an arithmetic progression; Described a plurality of mirror surface is divided into a
1, a
2, a
3, a
4... a
nAnd b
1, b
2, b
3, b
4... b
nTwo groups, lay respectively at the both sides of mirror drum, a plurality of mirror surface a
1, a
2, a
3, a
4... a
nChange successively with the angle of mirror drum axial line and angle value becomes an arithmetic progression, be positioned at a plurality of mirror surface b of another side simultaneously
1, b
2, b
3, b
4... b
nAlso change successively with the angle of mirror drum axial line and angle value constitute one with the identical arithmetic progression of aforementioned arithmetic progression tolerance, and the first mirror surface a that organizes of a
1First mirror surface b with the b group
1The angle of both and mirror drum axial line is the phase difference of half tolerance value numerically.
2, light deflector according to claim 1 is characterized in that mirror surface is directly to grind polishing by the mirror drum side to constitute.
3, light deflector according to claim 1 and 2 is characterized in that mirror surface is fixed on the mirror drum side.
4, a kind of picture of large image scale projection equipment is characterized in that comprising:
Radiation beam source (2);
The light beam primary event is formed the light deflector (1) of field scan and line scanning; This light deflector (1) is made of the polyhedron mirror drum with a plurality of mirror surfaces, and each mirror surface all has the angle of an inclination with the axial line of mirror drum, and these a plurality of angle angle values become an arithmetic progression; Described a plurality of mirror surface is divided into a
1, a
2, a
3, a
4... a
nAnd b
1, b
2, b
3, b
4... b
nTwo groups, lay respectively at the both sides of mirror drum, a plurality of mirror surface a
1, a
2, a
3, a
4... a
nChange successively with the angle of mirror drum axial line and angle value becomes an arithmetic progression, be positioned at a plurality of mirror surface b of another side simultaneously
1, b
2, b
3, b
4... b
nAlso change successively with the angle of mirror drum axial line and angle value constitute one with the identical arithmetic progression of aforementioned arithmetic progression tolerance, and the first mirror surface a that organizes of a
1First mirror surface b with the b group
1The angle of both and mirror drum axial line is the phase difference of half tolerance value numerically;
Image information processing circuit (7).
5, picture of large image scale projection equipment according to claim 4 is characterized in that also comprising the diffuse reflection screen (6) that forms image.
6,, it is characterized in that between radiation beam source (2) and light deflector (1), being provided with catoptron (9) according to claim 4 or 5 described picture of large image scale projection equipments.
7, picture of large image scale projection equipment according to claim 4 is characterized in that described radiation beam source (2) is a laser instrument.
8, picture of large image scale projection equipment according to claim 7, it is characterized in that laser instrument adopts red (R), green (G), the synthetic color laser of blue (B) tricolor laser device, at the preceding dichronic mirror (4b, 4c) that is provided with of laser instrument (3b, 3c), with the synthetic a branch of modulated color laser of laser instrument 3a.
9,, it is characterized in that between light deflector and diffuse surface, being equipped with the cylindrical lens (8) of scalable picture width according to claim 4 or 5 described picture of large image scale projection equipments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145513 CN1224855C (en) | 2002-12-05 | 2002-12-05 | Optical deflector capable of completing field scanning and line scanning at one time as well as device for projecting image with large area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145513 CN1224855C (en) | 2002-12-05 | 2002-12-05 | Optical deflector capable of completing field scanning and line scanning at one time as well as device for projecting image with large area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1415994A CN1415994A (en) | 2003-05-07 |
| CN1224855C true CN1224855C (en) | 2005-10-26 |
Family
ID=4750911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02145513 Expired - Fee Related CN1224855C (en) | 2002-12-05 | 2002-12-05 | Optical deflector capable of completing field scanning and line scanning at one time as well as device for projecting image with large area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224855C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438510A (en) * | 2003-01-08 | 2003-08-27 | 王青山 | Zoned multi-row-scanning type laser projector |
| CN100514174C (en) * | 2004-11-19 | 2009-07-15 | 杨东佐 | Image projecting system and light operating method |
| TWI472805B (en) | 2013-07-15 | 2015-02-11 | Delta Electronics Inc | Autostereoscopic Display Device and Projecting Method using the same |
| CN104297928B (en) * | 2013-07-15 | 2017-03-01 | 台达电子工业股份有限公司 | 3 d display device and its projecting method of application |
| CN108744302A (en) * | 2018-07-05 | 2018-11-06 | 深圳市三时光科技有限公司 | A kind of laser wrinkle removing beauty instrument |
| JP7193367B2 (en) * | 2019-02-07 | 2022-12-20 | 川崎重工業株式会社 | Polygon mirror, light guiding device and optical scanning device |
| US12055660B2 (en) * | 2020-05-19 | 2024-08-06 | Gm Cruise Holdings Llc | Polygon scanning mirror for lidar beam scanning |
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2002
- 2002-12-05 CN CN 02145513 patent/CN1224855C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1415994A (en) | 2003-05-07 |
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| PB01 | Publication | ||
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Granted publication date: 20051026 Termination date: 20100105 |