CN203465466U - Color scanning device - Google Patents
Color scanning device Download PDFInfo
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- CN203465466U CN203465466U CN201320619773.9U CN201320619773U CN203465466U CN 203465466 U CN203465466 U CN 203465466U CN 201320619773 U CN201320619773 U CN 201320619773U CN 203465466 U CN203465466 U CN 203465466U
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Abstract
The utility model relates to the technical field of color scanning and more specifically, to a color scanning device. Disclosed is the color scanning device, wherein the color scanning device includes blue laser, green laser, red laser, a beam expanding device used for expanding the three kinds of laser into wide laser beams, a circular diaphragm used for controlling the size of diffraction-limit light spots after focusing, a light-combining lens group used for combining the three beams of laser together, a scanning lens used for realizing scanning in +- 30-degree optical scanning angles and also an f(Theta) lens. The field angle of the f(Theta) lens of the color scanning device reaches +-30 degrees and has relatively a wide scanning amplitude and the scanning width reaches 1016mm, that is, about 40 inches. The diameter of the diffraction-spot Airy spot after the focusing is about 150 mum so that scanning resolution reaches more than 300dpi. Diffraction limit is reached at a focal plane and different kinds of monochromatic aberration are eliminated so that geometrical chromatic aberration is no more than 20 mum. Axial chromatic aberration is adjusted and eliminated by a beam expanding system. Residual vertical-axis chromatic aberration is adjusted and eliminated by an electron. An f(Theta) relation is achieved on an image plane. Therefore, the color scanning device has great scanning characteristics.
Description
Technical field
The utility model relates to the technical field of chromoscan, more specifically, relates to a kind of chromoscan device.
Background technology
Chromoscan can be used on image, prints industry.For the laser scanning system that uses scanning mirror (galvanometer or tilting mirror) scanning, the flat field focusing system f θ camera lens that is applicable to laser instrument emission wavelength is its core component.And generally take middle small breadth as main in image industry, scanning breadth is at 40 cuns still seldom.
Summary of the invention
The utility model is at least one defect overcoming described in above-mentioned prior art, and a kind of chromoscan device is provided, this device for sweep length be the wide cut flat field scanning optical apparatus of 40 cun, can realize achromatism and various monochromatic aberration.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of chromoscan device, wherein, comprise blue laser, green laser, red laser, for three kinds of laser are expanded, be the parallel beam expand device of thick laser beam, for controlling, focus on the circular iris of diffraction limit spot size afterwards, for what three beams of laser was combined, close light microscopic group, for realizing the scanning mirror in ± 30 degree optical scan angle interscans, also comprise f θ camera lens;
Described f θ camera lens is comprised of three eyeglasses, is respectively negative mirror, the first telescope direct and the second telescope direct, and negative mirror bends towards object space, and glass refraction is greater than 1.65, and Abbe number is less than 30; The first telescope direct and the second telescope direct bend towards image space, and the glass refraction of the first telescope direct and the second telescope direct is greater than 1.6, and Abbe number is greater than 50;
Every lens meet following relation:
－0.18<f1'/f'<－0.14
0.19<f2'/f'<0.27
0.48<f3'/f'<0.60
Wherein, f' is the focal length of scanning lens, and f1' is the focal length of the negative mirror of scanning lens, and f2' is the focal length of scanning lens the first telescope direct, and f3' is the focal length of scanning lens the second telescope direct.
Realize broad width scanning, need f θ camera lens to increase visual field or elongate focal length.Visual field is limited by the scan angle of galvanometer, and visual field f θ camera lens is difficult to calibration edge aberration greatly, so elongate focal length, is a kind of good selection.The operation wavelength of the laser of chromoscan is respectively blue laser 405nm, green laser 532nm, red laser 658nm, the entrance pupil diameter that each wavelength is corresponding is respectively 8.5mm, 9.2mm, 11mm, the effective focal length of f θ camera lens is 1118mm, greatest optical scan angle ± 30 degree, sweep length 1016mm.
Further, parallel beam expand device has narrow laser beam to expand the effect for thick laser beam and adjusting f θ camera lens chromatic longitudiinal aberration; Circular iris also arrives the spot size of diffraction limit after focusing in order to control; Close light microscopic group in order to close light; Scanning mirror is realized in ± 30 degree optical scan angle interscans; F θ camera lens is realized flat field focusing scanning, eliminates various monochromatic aberrations and part achromatism.
Further, described parallel beam expand device comprises the negative mirror of shaping and expands telescope direct, and the quantity of the negative mirror of shaping is 3, and the quantity that expands telescope direct is 3, and 3 negative mirrors of shaping and 3 expand telescope direct corresponding blue laser, green laser, red laser respectively.Described circular iris comprises blue laser circular iris, green laser circular iris and red laser circular iris.Described close light microscopic group comprise be located at blue laser circular iris one side catoptron, be located at green laser circular iris one side anti-green logical blue spectroscope, be located at the anti-red logical bluish-green blue spectroscope of red laser circular iris one side.
Compared with prior art, beneficial effect is: the depth of focus of have ± 10mm of f θ camera lens of the present utility model, the long 948mm of focal length, back focal length is 1118mm, reach ± 30 degree of field angle, have wider sweep amplitude, and sweep length reaches the i.e. 40 cun of left and right of 1016mm, diffraction pattern Aili spot diameter after focusing is 150 μ m left and right, more than making scanning resolution arrival 300dpi; In focal plane, place reaches diffraction limit, has eliminated various monochromatic aberrations, makes geometrical aberration be no more than 20 μ m, axial chromatic aberration is regulated and is eliminated by beam-expanding system, residual chromatic longitudiinal aberration is eliminated by electronic control, meets f θ relation in image planes, has good scan characteristic.
Accompanying drawing explanation
Fig. 1 is the whole light path schematic diagram of scanister of the present utility model.
Fig. 2 is f θ camera lens schematic diagram of the present utility model.
Fig. 3 is hot spot point diagram of the present utility model.
Fig. 4 is the curvature of field of the present utility model and f
θdistortion figure.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.
As shown in Figure 1, 2, a kind of chromoscan device, wherein, comprise blue laser 1, green laser 2, red laser 3, for three kinds of laser are expanded, be the parallel beam expand device of thick laser beam, for controlling, focus on the circular iris of diffraction limit spot size afterwards, for what three beams of laser was combined, close light microscopic group, for realizing the scanning mirror 8 in ± 30 degree optical scan angle interscans, also comprise f θ camera lens 9;
Described f θ camera lens 9 is comprised of three eyeglasses, is respectively negative mirror 10, the first telescope direct 11 and the second telescope direct 12, and negative mirror 10 bends towards object space, and glass refraction is greater than 1.65, and Abbe number is less than 30; The first telescope direct 11 and the second telescope direct 12 bend towards image space, and the glass refraction of the first telescope direct 11 and the second telescope direct 12 is greater than 1.6, and Abbe number is greater than 50;
Every lens meet following relation:
－0.18<f1'/f'<－0.14
0.19<f2'/f'<0.27
0.48<f3'/f'<0.60
Wherein, f' is the focal length of scanning lens, and f1' is the focal length of the negative mirror of scanning lens, and f2' is the focal length of scanning lens the first telescope direct, and f3' is the focal length of scanning lens the second telescope direct.
Scanning lens structural parameters are as follows:
Face sequence number radius-of-curvature thickness refractive index Abbe number
1(entrance pupil) ∞ 31 Air
2 -113.76 23.6 1.72 29.5
3 6194 2.1 Air
4 -1977 13.2 1.62 53.2
5 -128.82 11.3 Air
6 1158.8 19.3 1.61 58.9
7 -432.5 - Air
Realize broad width scanning, need f θ camera lens 9 to increase visual field or elongate focal length.Visual field is limited by the scan angle of galvanometer, and visual field f θ camera lens is difficult to calibration edge aberration greatly, so elongate focal length, is a kind of good selection.The operation wavelength of the laser of chromoscan is respectively blue laser 405nm, green laser 532nm, red laser 658nm, the entrance pupil diameter that each wavelength is corresponding is respectively 8.5mm, 9.2mm, 11mm, the effective focal length of f θ camera lens 9 is 1118mm, greatest optical scan angle ± 30 degree, sweep length 1016mm.
Further, parallel beam expand device has narrow laser beam to expand the effect for thick laser beam and adjusting f θ camera lens chromatic longitudiinal aberration; Circular iris also arrives the spot size of diffraction limit after focusing in order to control; Close light microscopic group in order to close light; Scanning mirror is realized in ± 30 degree optical scan angle interscans; F θ camera lens is realized flat field focusing scanning, eliminates various monochromatic aberrations and part achromatism.
Further, described parallel beam expand device comprises the negative mirror 4 of shaping and expands telescope direct 5, and the quantity of the negative mirror 4 of shaping is 3, and the quantity that expands telescope direct 5 is 3, and 3 negative mirrors 4 of shaping and 3 expand telescope direct 5 corresponding blue laser 1, green laser 2, red laser 3 respectively.Circular iris comprises blue laser circular iris 6a, green laser circular iris 6b and red laser circular iris 6c.Close light microscopic group comprise be located at blue laser circular iris 6a mono-side catoptron 7a, be located at green laser circular iris 6b mono-side anti-green logical blue spectroscope 7b, be located at the anti-red logical bluish-green blue spectroscope 7c of red laser circular iris 6c mono-side.
Its specific works principle: as shown in Figure 1, RGB three beams of laser expands as thick laser beam through parallel beam expand device, more respectively by three corresponding circular iris, then by closing light microscopic group, three beams of laser is combined, then reflex to f θ camera lens by scanning mirror, scan.F θ camera lens focuses a laser beam into back focal length 1118mm place, due to axial chromatic aberration, three look laser are not to focus on same position, can regulate respectively the distance between two lens of parallel beam expand device, three look laser are all transferred in back focal length plane and are focused on, spot diameter is all less than 150 μ m left and right, as shown in Figure 3.The various monochromatic aberrations such as spherical aberration coma eliminated by f θ camera lens and part is eliminated chromatic longitudiinal aberration, residue chromatic longitudiinal aberration electronic calibration when scanning.The curvature of field of also proofreading and correct f θ camera lens realizes the flat field scanning on focal plane, meets f θ relation, and maximum f θ distortion is no more than 2%, its curvature of field and f θ distortion are as shown in Figure 4, due to larger field angle and longer focal length, realize the scanning of large wide cut, sweep length can reach 40 cun of 1016mm.
The corresponding same or analogous parts of same or analogous label; In accompanying drawing, describe position relationship only for exemplary illustration, can not be interpreted as the restriction to this patent.
The above is only preferred implementation of the present utility model, should be understood that, for those skilled in the art, not departing under the prerequisite of the utility model principle, to the technical scheme of utility model, can do the improvement of some applicable actual conditions.Therefore, protection domain of the present utility model is not limited to this, and those of skill in the art are any to be included within the utility model protection domain based on non-material change in technical solutions of the utility model.
Claims (5)
1. a chromoscan device, it is characterized in that, comprise blue laser, green laser, red laser, for three kinds of laser are expanded, it is the parallel beam expand device of thick laser beam, for controlling the circular iris that focuses on rear diffraction limit spot size, for what three beams of laser was combined, close light microscopic group, for realizing the scanning mirror in ± 30 degree optical scan angle interscans, also comprise f θ camera lens;
Described f θ camera lens is comprised of three eyeglasses, is respectively negative mirror, the first telescope direct and the second telescope direct, and negative mirror bends towards object space, and glass refraction is greater than 1.65, and Abbe number is less than 30; The first telescope direct and the second telescope direct bend towards image space, and the glass refraction of the first telescope direct and the second telescope direct is greater than 1.6, and Abbe number is greater than 50;
Every lens meet following relation:
－0.18<f1'/f'<－0.14
0.19<f2'/f'<0.27
0.48<f3'/f'<0.60
Wherein, f' is the focal length of scanning lens, and f1' is the focal length of the negative mirror of scanning lens, and f2' is the focal length of scanning lens the first telescope direct, and f3' is the focal length of scanning lens the second telescope direct.
2. a kind of chromoscan device according to claim 1, is characterized in that, the depth of focus of described have ± 10mm of f θ camera lens, and the long 948mm of focal length, back focal length is 1118mm, and field angle is ± 30 degree, and sweep length is 1016mm.
3. a kind of chromoscan device according to claim 2, it is characterized in that, described parallel beam expand device comprises the negative mirror of shaping and expands telescope direct, the quantity of the negative mirror of shaping is 3, the quantity that expands telescope direct is 3, and the negative mirror of 3 shapings and 3 expand telescope direct corresponding blue laser, green laser, red laser respectively.
4. a kind of chromoscan device according to claim 3, is characterized in that, described circular iris comprises blue laser circular iris, green laser circular iris and red laser circular iris.
5. a kind of chromoscan device according to claim 4, it is characterized in that, described close light microscopic group comprise be located at blue laser circular iris one side catoptron, be located at green laser circular iris one side anti-green logical blue spectroscope, be located at the anti-red logical bluish-green blue spectroscope of red laser circular iris one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320619773.9U CN203465466U (en) | 2013-10-09 | 2013-10-09 | Color scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320619773.9U CN203465466U (en) | 2013-10-09 | 2013-10-09 | Color scanning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203465466U true CN203465466U (en) | 2014-03-05 |
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ID=50177819
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320619773.9U Expired - Fee Related CN203465466U (en) | 2013-10-09 | 2013-10-09 | Color scanning device |
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| CN (1) | CN203465466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279244A (en) * | 2017-10-25 | 2020-06-12 | 株式会社尼康 | Pattern drawing device |
-
2013
- 2013-10-09 CN CN201320619773.9U patent/CN203465466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279244A (en) * | 2017-10-25 | 2020-06-12 | 株式会社尼康 | Pattern drawing device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20181009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |