CN203825370U - Optical writing-in unit - Google Patents
Optical writing-in unit Download PDFInfo
- Publication number
- CN203825370U CN203825370U CN201420104056.7U CN201420104056U CN203825370U CN 203825370 U CN203825370 U CN 203825370U CN 201420104056 U CN201420104056 U CN 201420104056U CN 203825370 U CN203825370 U CN 203825370U
- Authority
- CN
- China
- Prior art keywords
- light
- writing unit
- lens
- incident
- aperture
- 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.)
- Expired - Fee Related
Links
Landscapes
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Facsimile Heads (AREA)
Abstract
The utility model relates to an optical writing-in unit which is characterized by comprising a light source, an aperture component and a lens array, wherein light from the light source passes through the aperture of the aperture component; the lens array is provided with an incident lens surface and a light receiving surface outside the incident lens surface, and the incident lens surface and the light receiving surface receive light passing through the aperture of the aperture component; the light source, the aperture component and the lens array are arranged in manners of ensuring that light emitted from the light source enters a range of the incident lens surface and the light receiving surface and the light which enters the light receiving surface does not enter an image surface. According to the optical writing-in unit disclosed by the utility model, stray light can be basically avoided, light for imaging can be sheltered, and the requirements on the shape precision and position precision of the aperture can be reduced.
Description
Technical field
The utility model relates to light writing unit, more particularly, relates to the light writing unit that comprises lens and mirror integral type array.
Background technology
In electrophotographic printer, photosensitive drums exposure is formed to sub-image,, then toner is transferred on paper image development by toner, wait toner photographic fixing on paper by heating.In exposure-processed, be divided into LED optical system and laser optical system.In the write head of the LED optical system in past, the luminous power of LED is exposed to photosensitive drums via erecting equal-magnification rod type lens array.
In the prior art, there is such shell mechanism: LED array is contacted with the two sides of the protuberance of housing with laminated resin lens arra, the distance of the plane of incidence one side of LED array and laminated resin lens arra can be accurately provided.
Utility model content
Although a lot of technical schemes have all proposed to have the unit that is provided with the structure in hole between lens arra and light source, the same with technique scheme, only to realize positional precision as object, and the measure of reply parasitic light is carried out separately by lens arra.
In reading system, sometimes have tiny slit, this is to occur parasitic light after preventing entering lens arra from having of the sub scanning direction region of wider width compared with the light of wide-angle, the light at the subscan two ends of the arrival lens that penetrate from slit is also irradiated to the place with the light-shielding pattern identical with central portion, does not have special structure.Owing to there being tiny slit, near the light of optical axis that enters sub scanning direction is also truncated, owing to there being slit to reduce light quantity.
Will be in the problems referred to above, an aspect of the present utility model provides a kind of light writing unit, it is characterized in that, comprising: light source; Aperture parts, pass through from the aperture of described aperture parts from the light of described light source; And lens arra, thering is incident lens face and the light receiving surface in the outside of described incident lens face, described incident lens face and described light receiving surface receive by the light in the described aperture of described aperture parts; Wherein, described light source, described aperture parts and described lens arra are arranged in the scope that the light that makes to send from described light source is incident on described incident lens face and described light receiving surface and make the light that is incident to described light receiving surface not be incident to image surface.
In above-mentioned light writing unit, preferred described light receiving surface is positioned at the both sides of described incident lens face on the sub scanning direction of described smooth writing unit.
In above-mentioned light writing unit, preferred described light receiving surface is two light receiving surfaces, has the flat shape with respect to the face tilt vertical with sub scanning direction, and described two light receiving surfaces are splayed to each other.
In above-mentioned light writing unit, preferred described aperture parts take the shape of the letter U in the section vertical with main scanning direction, and described aperture is arranged on the bottom of described U-shaped, and described lens arra is installed in the described aperture parts of described U-shaped.
In above-mentioned light writing unit, preferably described smooth writing unit further comprises: substrate, described light source is arranged on described substrate, and described substrate can move up in the side vertical with sub scanning direction with main scanning direction.
In above-mentioned light writing unit, on preferred described light receiving surface, be provided with photomask.
In above-mentioned light writing unit, preferably described smooth writing unit further comprises housing, and described light source and described lens arra are arranged in described housing, and described aperture parts are arranged in described housing or form the part of described housing.
In above-mentioned light writing unit, preferred described light source comprises multiple light emitting diodes, and described multiple light emitting diode is arranged on main scanning direction shape in column.
In above-mentioned light writing unit; preferred described incident lens face is to be made up of the multiple little convex lens of arranging on main scanning direction; described lens arra further comprises ejaculation lens face; the light penetrating from described ejaculation lens face is incident to described image surface; and described smooth writing unit also comprises protective cover, protective cover described in the end butt of the described ejaculation lens face side of described lens arra.
In above-mentioned light writing unit, preferred described lens arra further comprises mirror surface, and described lens arra is with the integrated lens arra of transparent resin.
According to smooth writing unit of the present utility model, can substantially avoid parasitic light, can not cover the light for imaging, and reduce form accuracy to aperture and the requirement of positional precision.
Brief description of the drawings
Fig. 1 shows the stereographic map of the example of a lens arra.
Fig. 2 shows the stereographic map of the part in the lens arra shown in Fig. 1.
Fig. 3 shows the schematic diagram of the configuration example of a kind of smooth writing unit and photosensitive drums.
Fig. 4 (a) shows the schematic diagram of the first embodiment of light writing unit.
Fig. 4 (b) shows the amplification stereogram of the specific region A of lens arra.
The part that Fig. 4 (c) shows the specific region A of lens arra becomes the front elevation without clinoplane.
Fig. 4 (d) shows the stereographic map of the lens arra of Fig. 4 (c).
Fig. 5 shows the schematic diagram of the light path that incides specific region A.
Fig. 6 shows the schematic diagram of the second embodiment of light writing unit.
Embodiment
Below, with reference to accompanying drawing, each embodiment is described.For convenience of explanation, in institute's drawings attached, as shown in fig. 1, main scanning direction is made as to x direction, sub scanning direction is made as to y direction, the direction vertical with y direction with x direction is made as z direction.In addition, in figure, similar parts or key element represents with similar symbol.
Fig. 1 shows according to the stereographic map of the lens arra of an embodiment of the utility model.As shown in Figure 1, the one end in the z direction of lens arra 11 has the incident lens face S arranging on main scanning direction
i, this incident lens face can be by multiple little convex lens S
iform.Also there is respectively the plane A of inclination in the both sides up and down of incident lens (on the sub scanning direction in Fig. 1)
1and A
2(can be referred to as region A), the plane of two inclinations is for example splayed each other.Region A makes substantially can not arrive image surface by the light in this region.Can setting example on the A of region as photomask.There is the exit lens face S arranging on main scanning direction at the other end of lens arra 11
o, this exit lens face also can be made up of multiple little convex lens.Also can there is respectively the plane of inclination in the both sides up and down of exit lens face (on the sub scanning direction in Fig. 1), and can be splayed.At incident lens face S
iwith exit lens face S
obetween can multiple reflectings surface be set in for example top and the bottom of lens arra 11, for will be from incident lens face S
ilight guide to exit lens face S
o.Lens arra 11 can with for example transparent resin one-body molded form.In addition, photomask F can be set on lens arra 11
b, for example, can be arranged on the shade shown in Fig. 1 (to represent) region.
Fig. 2 shows the stereographic map of the part in the lens arra shown in Fig. 1.Figure 2 illustrates one group of little convex lens of incident, reflecting surface, the little convex lens of outgoing in the little convex lens of multiple incidents of arranging on main scanning direction, multiple mirror surface, the little convex lens of multiple outgoing, i.e. corresponding one group of lens and catoptron on the directions X shown in Fig. 1.In Fig. 2, illustrate and between one group of plane of incidence and exit facet, arranged two corresponding reflecting surface S
m1and S
m2, on sub scanning direction, lay respectively at the both sides of lens arra.Reflecting surface S
m1dip plane is to incident lens face S
i, and reflecting surface S
m2dip plane is to exit lens face S
o, for will be from incident lens face S
ilight guide to corresponding exit lens face S
o.Reflecting surface S
m1accept from incident lens face S
iincident light, and reflexed to reflecting surface S
m1, reflecting surface S
m2self-reflection face S in the future
m1light reflex to again exit lens face S
o.
Shown in Fig. 2, there is reflecting surface S
m1reflection block B
1width on main scanning direction can be less than corresponding incident lens face S
iwidth, at reflection block B
1and have between the block of the little convex lens of incident and have a transition block B
2, transition block B
2with there is described plane A
1part on sub scanning direction, there is difference in height.And, transition block B
2width on main scanning direction can be less than reflection block B
1.Therefore, at each reflection block B
1between and each transition block B
2between there is gap.In Fig. 2 and corresponding in Fig. 1 shadow region (to represent) are provided with photomask F
b.Note, at reflection block B
1with transition block B
2main scanning direction on both sides be provided with photomask F
b.For convenience of explanation, in this article, lens arra is divided into reflection block and transition block etc., but in integrated situation, these blocks are in fact one.In addition, the quantity of reflecting surface and arrangement can have and be different from above-mentioned quantity and arrangement.
Fig. 3 shows the schematic diagram of the configuration example of a kind of smooth writing unit and photosensitive drums.Light writing unit 10 can comprise lens arra 11, light source 12, substrate 13 and housing 14 etc.Photosensitive drums 1 is arranged on the light exit side of light writing unit 10, utilizes the light receiving to form sub-image.Housing 14 can be the housing of rectangular parallelepiped roughly, and as shown in Figure 3, at the section vertical with main scanning direction, housing 14 has roughly U-shaped ((shown in figure, corner is rectangular)).In housing 14, be provided with substrate 13 with in direction parallel at the bottom of U-shaped, substrate 13 can be such as glass epoxy substrate, metal substrate etc.On substrate 13, be provided with light source 12.For example, light source 12 can be the above-listed shape of main scanning direction configure multiple LED(photodiodes) LED array.Substrate 13 can be arranged on the fixed position in housing 14, also can in Z direction, move around as shown by arrows, can adjust thus the position of light source 12 with respect to lens arra 11, thereby adjusts the focus of lens arra 11.There is peristome O facing in a side of light source 12 of housing 14
1, the light-emitting face side of lens arra 11 can be entrenched in peristome O
1in.The light sending from light source 12 is radiated at the light-sensitive surface of photosensitive drums 1 via lens arra 11.
In addition, in light writing unit 10, can also comprise for example protective cover 15 and apart from maintaining part 16.The outside surface that is positioned at housing 14 open side is the reference field S of light writing unit
r, protective cover 15 can be arranged on reference field S
ron.Protective cover 15 covers peristome O
1, for dustproof or can be by wiping in the time safeguarding.Protective cover 15 can be cloche or transparent resin cover etc., is preferably cloche.Be arranged on reference field S apart from maintaining part 16
ron both sides, for example can be arranged on the both sides of protective cover 15, for keeping light writing unit reference field S
rand the distance between the light-sensitive surface of photosensitive drums 1.Can be according to different protective cover thickness apart from the thickness of maintaining part 16 and difference.
Fig. 4 (a) shows according to the schematic diagram of the light writing unit of an embodiment of the present utility model.As shown in Figure 4 (a), light writing unit 20 comprises (aperture) O that has peristome
2cap 27, be roughly U-shaped at the section of directions X.Lens arra 21 is arranged in cap 27.Through peristome O
2luminous energy get at the regulation region A(in outside that reaches incident lens face and be positioned at this incident lens face referring to Fig. 1, Fig. 4 (b)), the width that specific region A has is more than or equal to and produces and depart from the width that the time can reach with the relative position of cap because of foozle etc.There is thus above-mentioned feature, can not cover the light for imaging, thereby increase light quantity.Form accuracy, position accuracy demand for aperture are comparatively loose, that is to say, even peristome O
2slightly be offset with the relative positioning of light source 12, also can not affect and enter incident lens face S
ilight quantity, thus, reduced the requirement for manufacturing process, thereby reduced production cost.And, significantly reduce parasitic light.In addition, for the light that incides specific region A is not penetrated to image surface from outgoing plane, and form the plane of inclination, making does not thus have parasitic light substantially.Cap 27 also can be with for example having peristome (aperture) O
2resin sheet substitute.
In the light writing unit 10 shown in Fig. 3, if lens arra is made up of resin, and do not apply light screening material etc., there will be a large amount of scattered lights.In the case, all parasitic light is 91.49%, and wherein optics parasitic light accounts for 6.39%, and other parasitic lights account for 85.10%.And in the light writing unit 20 shown in Fig. 4 (a), all parasitic light is 0.44%, wherein optics parasitic light accounts for 0.26%, and other parasitic lights account for 0.18%.Therefore, can say and substantially eliminate in the present embodiment parasitic light.
The amplification stereogram of the specific region A of lens arra is shown, i.e. the region A of the lens arra in Fig. 1 and Fig. 4 (a) in Fig. 4 (b)
1and A
2enlarged drawing.Region A in Fig. 4 (b)
1and A
2lay respectively at incident lens face S
iboth sides, are roughly splayed.
The part a-quadrant that Fig. 4 (c) shows lens arra becomes the front elevation without clinoplane.In Fig. 4 (c), in order to show the advantage that region A is formed as to clinoplane, show the state of the inclination of the A portion that only removes the rightmost side.By changing the angle of region A, can change the widest part and the ratio at narrow place, thereby can proofread and correct the inhomogeneous of light quantity.
Fig. 4 (d) shows the stereographic map of Fig. 4 (c).In such formation, can also on the A of region, form photomask.
Fig. 5 shows the light path that incides the light in the A of region.The profile of lens arra is confirmed as not making to incide light in the region A outside lens from exit lens face S
othe shape outwards penetrating.For example, in Fig. 5, incide block, the transition block B of the light of region A from the block of inclusion region A1, inclusion region A2
2penetrate.According to above-mentioned disclosure, those skilled in the art according to actual needs setting example if region A1 and region A2 are with respect to angle, the outer shape of lens arra etc. of Z direction, thereby realize the above-mentioned appearance that prevents parasitic light, reduce such as, form accuracy to aperture (cap 27 in Fig. 4 (a)), the requirement of positional precision, increase the technique effects such as light quantity.
Fig. 6 shows the schematic diagram of the light writing unit of the second embodiment.Light writing unit 30 can comprise lens arra 31, light source 32, substrate 33 and housing 34 etc.Photosensitive drums 2 is arranged on the light exit side of light writing unit 30, utilizes the light receiving to form sub-image.As shown in Figure 5, in the section vertical with main scanning direction, in the direction towards photosensitive drums 2, housing 34 dwindles steppedly gradually.In housing 34, be provided with substrate 33, substrate 33 can adopt such as glass epoxy substrate, metal substrate etc.On substrate 33, be provided with light source 32.For example, light source 32 can be the above-listed shape of main scanning direction configure the LED array of multiple LED chips.As shown in Figure 5, substrate 33 is arranged on the step in the space of the width maximum in housing 34.Between light source 32 and lens arra 31, separated by the dividing plate in housing 34, on dividing plate, there is peristome (aperture) O
3, the light that light source 32 sends is through peristome O
3be incident to lens arra 31, aperture parts form a part for housing.Housing 34 is different with the housing 24 of Fig. 4 (a) from the housing 14 of Fig. 3, being wide-open near photosensitive drums 2 side ends, is sealed by protective cover 35.The least significant end butt protective cover 35 of the light exit side of lens arra 31.And two blocks respectively with region A1 and A2 of lens arra 31 are connected to the surface of framework and dividing plate.
Now, housing can resin forming or is cut out aluminium alloy and form.For example, housing can form by for example sheet metal processing.In this example, be also provided with in incident one side of lens (mirror integral type) array the position contacting with the inside surface of the integrated flange surface of lens face and housing, therefore, even if lens arra bends, also can correct it.In addition, light writing unit 30 also has the constructed effect of light writing unit 20.
In the above-described embodiments, show the example that lens-catoptron and flange part are integrated, but the lens arra being only integrally formed with lens face, or only also can there is same effect with the one-piece type array that catoptron forms.If catoptron is the special circumstances that incident lens face, the lens shape that penetrates lens face are plane.
Although described part embodiment, these embodiment only present as an example, are not limited to scope of the present utility model.In fact, new embodiment described herein can show as other various forms; In addition can, in the situation that not departing from spirit of the present utility model, embodiment described herein be carried out various omissions, substitute and be changed.Appending claims and equivalency range thereof comprise the described various forms or the improvement that fall in scope and spirit of the present utility model.
Claims (10)
1. a light writing unit, is characterized in that, comprising:
Light source,
Aperture parts, pass through from the aperture of described aperture parts from the light of described light source, and
Lens arra, has incident lens face and the light receiving surface in the outside of described incident lens face, and described incident lens face and described light receiving surface receive by the light in the described aperture of described aperture parts,
Wherein, described light source, described aperture parts and described lens arra are arranged in the scope that the light that makes to send from described light source is incident on described incident lens face and described light receiving surface and make the light that is incident to described light receiving surface not be incident to image surface.
2. smooth writing unit according to claim 1, is characterized in that:
Described light receiving surface is positioned at the both sides of described incident lens face on the sub scanning direction of described smooth writing unit.
3. smooth writing unit according to claim 1, is characterized in that:
Described light receiving surface is two light receiving surfaces, has the flat shape with respect to the face tilt vertical with sub scanning direction, and described two light receiving surfaces are splayed to each other.
4. smooth writing unit according to claim 1, is characterized in that:
Described aperture parts take the shape of the letter U in the section vertical with main scanning direction, and described aperture is arranged on the bottom of described U-shaped, and
Described lens arra is installed in the described aperture parts of described U-shaped.
5. smooth writing unit according to claim 1, is characterized in that, described smooth writing unit further comprises:
Substrate, described light source is arranged on described substrate, and described substrate can move up in the side vertical with sub scanning direction with main scanning direction.
6. smooth writing unit according to claim 1, is characterized in that:
On described light receiving surface, be provided with photomask.
7. smooth writing unit according to claim 1, is characterized in that:
Described smooth writing unit further comprises housing, and described light source and described lens arra are arranged in described housing, and
Described aperture parts are arranged in described housing or form a part for described housing.
8. according to the light writing unit described in any one in claim 1 to 7, it is characterized in that:
Described light source comprises multiple light emitting diodes, and described multiple light emitting diode is arranged on main scanning direction shape in column.
9. according to the light writing unit described in any one in claim 1 to 7, it is characterized in that:
Described incident lens face is to be made up of the multiple little convex lens of arranging on main scanning direction,
Described lens arra further comprises ejaculation lens face, and the light penetrating from described ejaculation lens face is incident to described image surface, and
Described smooth writing unit also comprises protective cover, protective cover described in the end butt of the described ejaculation lens face side of described lens arra.
10. according to the light writing unit described in any one in claim 1 to 7, it is characterized in that:
Described lens arra further comprises mirror surface, and described lens arra is with the integrated lens arra of transparent resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104056.7U CN203825370U (en) | 2014-03-07 | 2014-03-07 | Optical writing-in unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104056.7U CN203825370U (en) | 2014-03-07 | 2014-03-07 | Optical writing-in unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825370U true CN203825370U (en) | 2014-09-10 |
Family
ID=51480849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420104056.7U Expired - Fee Related CN203825370U (en) | 2014-03-07 | 2014-03-07 | Optical writing-in unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825370U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110463172A (en) * | 2017-03-24 | 2019-11-15 | 日本板硝子株式会社 | Image sensor cell and image read-out |
| CN112558444A (en) * | 2019-09-10 | 2021-03-26 | 东芝泰格有限公司 | Optical array, optical device, and image forming apparatus |
-
2014
- 2014-03-07 CN CN201420104056.7U patent/CN203825370U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110463172A (en) * | 2017-03-24 | 2019-11-15 | 日本板硝子株式会社 | Image sensor cell and image read-out |
| US10917536B2 (en) | 2017-03-24 | 2021-02-09 | Nippon Sheet Glass Company, Limited | Image sensor unit and image reading device |
| CN110463172B (en) * | 2017-03-24 | 2022-03-25 | 日本板硝子株式会社 | Image sensor unit and image reading apparatus |
| CN112558444A (en) * | 2019-09-10 | 2021-03-26 | 东芝泰格有限公司 | Optical array, optical device, and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8698865B2 (en) | Lens array unit, erecting equal-magnification lens array, optical scanning unit, image reading device, and image writing device | |
| US9329333B2 (en) | Irradiation device and image-reading device | |
| US9778591B2 (en) | Lens mirror array, optical unit and image forming apparatus | |
| JP6324912B2 (en) | Lens mirror array, optical unit, and image forming apparatus | |
| JP2012235538A (en) | Image-scanning device | |
| JP5896215B2 (en) | Optical scanning apparatus and image forming apparatus | |
| CN101867676A (en) | Lighting device and image read-out | |
| US20220014641A1 (en) | Image reading device | |
| US20120229878A1 (en) | Erecting equal-magnification lens array plate, optical scanning unit, image reading device, and image writing device | |
| KR20120050179A (en) | Flash lens and flash module employing the same | |
| US20210339460A1 (en) | Optical shaping apparatus | |
| CN203825370U (en) | Optical writing-in unit | |
| KR20110050367A (en) | Scanning optical apparatus and image forming apparatus using the same | |
| US9146396B2 (en) | Optical scanning apparatus having light source and holder holding lens and image forming apparatus including optical scanning apparatus | |
| US8052290B2 (en) | Rear-projection-type display apparatus | |
| JP2003302504A (en) | Lens array unit and optical device equipped with the same | |
| CN110463172B (en) | Image sensor unit and image reading apparatus | |
| KR101979455B1 (en) | Image forming optical element, image forming optical array and image reading device | |
| JP5266660B2 (en) | Projection display | |
| US9176320B2 (en) | Optical scanning apparatus | |
| JP2013029650A (en) | Lens array and image sensor module | |
| CN203825371U (en) | Light writing unit and light scanning unit with light writing unit | |
| KR200435780Y1 (en) | Improved structure of lighting source for led | |
| JP2012238962A (en) | Integrated scanning optical unit, image reading device, and image forming apparatus | |
| CN110174763A (en) | A kind of laser scan unit and laser printer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20190307 |