CN110133843A - A kind of laser scan unit and laser printer - Google Patents
A kind of laser scan unit and laser printer Download PDFInfo
- Publication number
- CN110133843A CN110133843A CN201910370178.8A CN201910370178A CN110133843A CN 110133843 A CN110133843 A CN 110133843A CN 201910370178 A CN201910370178 A CN 201910370178A CN 110133843 A CN110133843 A CN 110133843A
- Authority
- CN
- China
- Prior art keywords
- laser
- scan unit
- lens group
- laser scan
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/023—Catoptric systems, e.g. image erecting and reversing system for extending or folding an optical path, e.g. delay lines
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/124—Details of the optical system between the light source and the polygonal mirror
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/0409—Details of projection optics
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Laser Beam Printer (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
The present invention provides a kind of laser scan unit and laser printer, laser scan unit includes laser generator, lens group, polygonal mirror motor and the light-receiving surface along optical path setting；At least one piece of reflecting mirror folded to laser beam is provided between the lens group and the polygonal mirror motor.By increasing by one piece or muti-piece reflecting mirror, laser beam is folded, while guaranteeing optical characteristics, optimization component placement design can substantially reduce the effect of overall dimensions.Structure materials, save the cost can be reduced.Overall dimensions reduce, and are more advantageous to the design of the miniaturization and lightweight of complete machine.
Description
Technical field
The present invention relates to laser scanning device technical fields, and in particular to a kind of laser scan unit and laser printing
Machine.
Background technique
In current laser printer, laser cell mostly uses laser scan unit (LSU) and laser matrix (LPH).
As shown in Figure 1, laser scan unit on the market includes laser generator (LD) 100, collimation lens set 101, polygonal mirror motor
102, FTL lens 103 and light-receiving surface (OPC) 104.The laser beam that laser generator issues is divergent beams, divergent beams
By collimation lens set, once focus on the mirror surface of polygonal mirror motor；Laser after the reflection of polygonal mirror motor can dissipate, and pass through
FTL lens, on light-receiving surface surface, second of focusing forms hot spot.The photosensitive coating on light-receiving surface surface is sent out after receiving the energy of hot spot
Raw potential difference, forms the image sub-image of adsorbable carbon dust.
Specifically, in vertical direction, the laser beam that laser generator issues passes through collimation lens set, once focuses on
On the mirror surface of polygonal mirror motor；Laser after the reflection of polygonal mirror motor can dissipate, by FTL lens, on light-receiving surface surface second
Secondary focusing, hot spot needed for forming image sub-image.In the horizontal direction, the laser beam that laser generator issues is saturating by collimation
Microscope group, polygonal mirror motor and FTL lens once focus on light-receiving surface surface, hot spot needed for forming image sub-image.
Since the optical design of FTL lens is complicated, cause the development cycle long；And the two sides function curved surface of FTL lens is equal
For higher-order curved surfaces, mould and die accuracy demand is high, and manufacturing cost is high.In consideration of it, occurring saving FTL lens in the prior art
Solution, and in the solution that others save FTL lens, directly laser generator is projected by collimation lens set
Laser focus on light-receiving surface surface, then need the optical system of hyperfocal distance to guarantee the spot size one projected on light-receiving surface
It causes.It is commonly designed and needs focal length in 300mm or more, effective field depth only saves FTL lens then in ± 40mm or more
It is larger to will lead to entirety, it is larger so as to cause overall dimensions, it is unfavorable for the miniaturization of printing device, is unfavorable in printer complete machine
The layout of portion's element
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcome it is in the prior art save FTL lens then and will lead to it is whole
Body is larger, larger so as to cause overall dimensions, is unfavorable for the miniaturization of printing device, is unfavorable for printer complete machine internal element
The defects of layout, to provide a kind of laser scan unit and laser printer.
A kind of laser scan unit provided by the invention, including laser generator, lens group, the polygonal mirror being arranged along optical path
Motor and light-receiving surface；At least one piece is provided between the lens group and the polygonal mirror motor to fold laser beam
Reflecting mirror.
Optionally, the lens group includes making the laser beam of the laser generator sending in vertical direction peace
The equal shaping lens of the angle of divergence on line direction.
Optionally, the lens group includes with the laser beam for issuing the raw device in the laser side in vertical direction
With the toroidal lens for realizing focusing in horizontal direction simultaneously.
Optionally, the lens group includes being set to the energy concentration for intercepting the laser beam centre of end
Light beam diaphragm.
Optionally, the diaphragm includes rectangular or circular aperture.
Optionally, it is provided with one piece of reflecting mirror.
Optionally, the focal length of the lens group is greater than 300mm.
Invention also provides a kind of laser printers, including laser scan unit described in any of the above embodiments.
Technical solution of the present invention has the advantages that
A kind of laser scan unit provided by the invention, by increase by one piece or muti-piece reflecting mirror, to laser beam into
Row folds, and while guaranteeing optical characteristics, optimization component placement design can substantially reduce the effect of overall dimensions.It can reduce
Structure materials, save the cost.Overall dimensions reduce, and are more advantageous to the design of the miniaturization and lightweight of complete machine
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the optical schematic diagram of laser scan unit in the prior art；
Fig. 2 is the optical schematic diagram of the laser scan unit provided in the first embodiment of the invention.
Description of symbols:
1- laser generator, 2- lens group, 3- polygonal mirror motor, 4- transmitting mirror, 5- light-receiving surface.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 2 shows a kind of laser scan units provided by the invention.The laser scan unit includes being arranged along optical path
Laser generator (LD) 1, lens group 2, polygonal mirror motor 3, reflecting mirror 4 and light-receiving surface (OPC) 5.
Wherein, the laser beam that laser generator 1 issues reaches polygonal mirror motor by lens group 2 and reflecting mirror 4 with this
3.Using the reflecting mirror of design, laser beam is folded.The laser beam of focusing on the way is reflexed into polygonal mirror motor 3
On.It is reflected by the revolution of polygonal mirror motor 3, the laser beam after above-mentioned focusing is reflexed to the specific bit on 5 surface of light-receiving surface
It sets.Laser beam is after the photosensitive coating for forming 5 surface of hot spot light-receiving surface after 5 surface of light-receiving surface focuses receives the energy of hot spot
Potential difference occurs, forms the image sub-image of adsorbable carbon dust.Since polygonal mirror motor 3 only has the function of rotary reflection, and
It will not influence the focusing of laser beam.
The focal length of lens group 2 should be greater than 300mm, with sufficiently small for forming hot spot on polygonal mirror motor 3, although
Endless total focus, but still do not exceed the mirror surface range of polygonal mirror motor 3.Theoretically focal length is remoter, the depth of field of focusing
Bigger, the spot size in each position on 5 surface of light-receiving surface is more uniform, is more conducive to the raising of portrait quality.
Laser scan unit provided in this embodiment folds laser beam, guarantees light by increasing reflecting mirror 4
While learning characteristic, optimization component placement design can substantially reduce the effect of overall dimensions.Structure materials can be reduced, saved
Cost.Overall dimensions reduce, and are more advantageous to the design of the miniaturization and lightweight of complete machine
As another embodiment, the quantity of reflecting mirror 4 and position with no restriction, can be arranged two pieces in different location
Or two pieces or more of transmitting mirror.
As another embodiment, lens group includes making the laser beam of laser generator sending in vertical direction peace
The equal shaping lens of the angle of divergence on line direction.
As another embodiment, lens group includes with the laser beam for issuing the raw device in laser side in vertical direction
With the toroidal lens for realizing focusing in horizontal direction simultaneously.
Pass through setting shaping lens or toroidal lens in above-described embodiment, it is only necessary to which an optical shaping and focusing are not required to
It to be focused respectively for the light beam in all angles after the revolution reflection of polygonal mirror motor again, substantially reduce optics and open
The design verification period of hair；Compared with the prior art, it is no longer necessary to which FTL lens have saved development cost, have been greatly reduced and are produced into
This；Moreover, the control of the advantageous accumulated tolerance of reduction of optical element, optical property are more stable.
Invention also provides a kind of laser printer embodiments comprising the laser scanning list in above-described embodiment
Member.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (8)
1. a kind of laser scan unit, it is characterised in that: including the laser generator (1), lens group (2), more being arranged along optical path
Face mirror motor (3) and light-receiving surface (5)；Be provided between the lens group (2) and the polygonal mirror motor (3) at least one piece it is right
The reflecting mirror (4) that laser beam is folded.
2. laser scan unit according to claim 1, it is characterised in that: the lens group (2) includes making the laser
The laser beam that generator (1) issues equal shaping lens of the angle of divergence in vertical direction and parallel direction.
3. laser scan unit according to claim 1, it is characterised in that: the lens group (2) includes described with making
The laser beam that laser side raw device (1) issues realizes the toroidal lens of focusing simultaneously in the vertical direction and the horizontal direction.
4. laser scan unit according to any one of claim 1-3, it is characterised in that: the lens group (2) includes
It is set to the diaphragm of the light beam of the energy concentration for intercepting the laser beam centre of end.
5. laser scan unit according to claim 4, it is characterised in that: the diaphragm includes rectangular or circular small
Hole.
6. laser scan unit according to claim 1, it is characterised in that: be provided with one piece of reflecting mirror (4).
7. laser scan unit according to claim 1, it is characterised in that: the focal length of the lens group (2) is greater than
300mm。
8. a kind of laser printer, it is characterised in that: including laser scan unit of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370178.8A CN110133843A (en) | 2019-04-30 | 2019-04-30 | A kind of laser scan unit and laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370178.8A CN110133843A (en) | 2019-04-30 | 2019-04-30 | A kind of laser scan unit and laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110133843A true CN110133843A (en) | 2019-08-16 |
Family
ID=67576256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910370178.8A Pending CN110133843A (en) | 2019-04-30 | 2019-04-30 | A kind of laser scan unit and laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110133843A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888232A (en) * | 2019-12-12 | 2020-03-17 | 天津光电通信技术有限公司 | Double-beam laser scanning system and scanning method applied to laser printer |
| CN112731574A (en) * | 2020-12-31 | 2021-04-30 | 沂普光电(天津)有限公司 | Prism and laser scanning unit |
| CN113960902A (en) * | 2021-10-28 | 2022-01-21 | 北京高德品创科技有限公司 | A laser scanning unit and laser printer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56143409A (en) * | 1980-04-10 | 1981-11-09 | Matsushita Electric Ind Co Ltd | Laser scanning deflector |
| JPS5887965A (en) * | 1981-11-19 | 1983-05-25 | Nec Corp | Optical scanner |
| JPS59214012A (en) * | 1983-05-13 | 1984-12-03 | Kokusai Gijutsu Kaihatsu Kk | Laser printer |
| US4729617A (en) * | 1985-04-30 | 1988-03-08 | Ricoh Company, Ltd. | Scanning clock generating device for optical scanner |
| US20050269492A1 (en) * | 2004-06-07 | 2005-12-08 | Yun Sang K | Method of controlling beam scanning timing and beam energy and light beam scanning apparatus using the same |
| CN101510936A (en) * | 2008-02-12 | 2009-08-19 | 株式会社理光 | Image reading device and image forming apparatus |
| CN103364948A (en) * | 2010-02-24 | 2013-10-23 | 京瓷办公信息系统株式会社 | Optical scanning apparatus and image forming apparatus |
-
2019
- 2019-04-30 CN CN201910370178.8A patent/CN110133843A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56143409A (en) * | 1980-04-10 | 1981-11-09 | Matsushita Electric Ind Co Ltd | Laser scanning deflector |
| JPS5887965A (en) * | 1981-11-19 | 1983-05-25 | Nec Corp | Optical scanner |
| JPS59214012A (en) * | 1983-05-13 | 1984-12-03 | Kokusai Gijutsu Kaihatsu Kk | Laser printer |
| US4729617A (en) * | 1985-04-30 | 1988-03-08 | Ricoh Company, Ltd. | Scanning clock generating device for optical scanner |
| US20050269492A1 (en) * | 2004-06-07 | 2005-12-08 | Yun Sang K | Method of controlling beam scanning timing and beam energy and light beam scanning apparatus using the same |
| CN101510936A (en) * | 2008-02-12 | 2009-08-19 | 株式会社理光 | Image reading device and image forming apparatus |
| CN103364948A (en) * | 2010-02-24 | 2013-10-23 | 京瓷办公信息系统株式会社 | Optical scanning apparatus and image forming apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 李晓彤，岑兆丰: "《几何光学•像差•光学设计 第2版》", 31 December 2007 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888232A (en) * | 2019-12-12 | 2020-03-17 | 天津光电通信技术有限公司 | Double-beam laser scanning system and scanning method applied to laser printer |
| CN112731574A (en) * | 2020-12-31 | 2021-04-30 | 沂普光电(天津)有限公司 | Prism and laser scanning unit |
| CN112731574B (en) * | 2020-12-31 | 2022-08-05 | 沂普光电(天津)有限公司 | Prism and laser scanning unit |
| CN113960902A (en) * | 2021-10-28 | 2022-01-21 | 北京高德品创科技有限公司 | A laser scanning unit and laser printer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190816 |