WO2009096278A1 - 走査光学系、光走査装置及び画像形成装置 - Google Patents
走査光学系、光走査装置及び画像形成装置 Download PDFInfo
- Publication number
- WO2009096278A1 WO2009096278A1 PCT/JP2009/050825 JP2009050825W WO2009096278A1 WO 2009096278 A1 WO2009096278 A1 WO 2009096278A1 JP 2009050825 W JP2009050825 W JP 2009050825W WO 2009096278 A1 WO2009096278 A1 WO 2009096278A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical system
- scanning
- lens
- group
- plastic lens
- Prior art date
Links
Images
Classifications
-
- 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
- G02B26/125—Details of the optical system between the polygonal mirror and the image plane
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/113—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
- H04N1/1135—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors for the main-scan only
Definitions
- the present invention relates to a high-resolution scanning optical system using a light beam having a wavelength of 500 nm or less, an optical scanning device, and an image forming apparatus such as a laser printer, a digital copying machine, a multifunction printer, and the like.
- the present invention relates to a scanning optical system, an optical scanning device, and an image forming apparatus that have excellent durability while being used.
- an optical scanning device used in an image forming apparatus such as a laser printer, a digital copying machine, or a multifunction printer deflects a light beam from a laser light source by a deflecting optical system such as a polygon mirror and scans a surface to be scanned by a scanning imaging optical system. An image is formed as a light spot on the top.
- a semiconductor laser or the like is generally used as a laser light source, and divergent light emitted from the laser light source is converted into a substantially parallel light beam by a collimator lens, and the outer shape is limited by an aperture.
- the light beam whose outer shape is limited is deflected by a deflecting optical system such as a polygon mirror that rotates at a constant angular velocity and is incident on a scanning imaging optical system.
- the scanning imaging optical system has an f ⁇ characteristic that scans a light beam deflected at a constant angular speed on a surface to be scanned arranged at a predetermined interval at an equal distance speed, and forms a minute light spot over the entire scanning area. Thus, it is necessary to correct the curvature of field well.
- the imaging lens system is an anamorphic lens system having different imaging characteristics in the main scanning direction and the sub-scanning direction.
- the above-described scanning imaging optical system has been manufactured from a glass material.
- a glass material since it is difficult and expensive to process a glass lens, in recent years, aberrations can be corrected with a low cost and a free shape. Production with plastic materials is desired.
- a semiconductor laser used as a light source is generally an infrared laser (wavelength of about 780 nm) or a red laser (wavelength of about 650 nm), but recently, a short wavelength of 500 nm or less is required due to the demand for higher resolution.
- Development of an optical scanning device that uses a light source to obtain a minute spot shape is in progress.
- the transmittance may decrease due to internal absorption in the material as the wavelength becomes shorter.
- a short wavelength light source 500 nm or less
- transmission due to internal absorption The decrease in rate is large.
- the transmittance is further reduced because the plastic lens becomes clouded when irradiated with light of a short wavelength for a long time.
- an optical scanning device in which at least one of the scanning imaging optical system is a plastic lens has been proposed as an optical scanning device using a light source of 500 nm or less (see Patent Document 1).
- an optical scanning device using a light source of 450 nm or less, an optical system between a light source and a deflection optical system as a glass optical element, and a scanning imaging optical system as a plastic optical element (patent) Reference 2).
- the optical element through which the light beam is always transmitted is a glass optical element
- the optical element of the scanning imaging optical system through which the light beam does not always pass is a plastic optical element.
- Patent Document 1 Although it is described that the thickness difference of the plastic lens is limited in order to reduce the unevenness of the light amount distribution due to the internal absorption of the plastic lens, the plastic lens becomes clouded by short wavelength light. However, there is a case in which there is no problem with respect to the decrease in the transmittance due to the problem.
- an object of the present invention is to provide a scanning optical system, an optical scanning apparatus, and an image forming apparatus that can downsize the apparatus and suppress a decrease in transmittance due to white turbidity.
- the invention of the scanning optical system according to claim 1 A light source that emits a light beam having a wavelength of 500 nm or less; A deflection optical system that deflects a light beam from the light source and scans it in the main scanning direction; In a scanning optical system having a scanning imaging optical system that images the light beam deflected by the deflection optical system on a scanned surface,
- the scanning imaging optical system includes: At least a first plastic lens provided adjacent to the deflection optical system; When the numerical aperture in the sub-scanning direction of the light beam incident on the deflection optical system is NA1, and the distance between the deflection optical system and the first plastic lens is t1 [mm], 0.05 ⁇ NA1 ⁇ t1 ⁇ 1.5 is satisfied,
- the first plastic lens is A plastic lens based on a resin comprising a copolymer of ⁇ -olefin and cyclic olefin, The cyclic olefin is represented by the following general formula (I) or (II
- n is 0 or 1
- m is 0 or a positive integer
- k is 0 or 1
- R 1 to R 18 and R a and R b are each independently Represents a hydrogen atom, a halogen atom or a hydrocarbon group.
- the invention according to claim 2 is the scanning optical system according to claim 1,
- the scanning coupling optical system has a second plastic lens closer to the surface to be scanned than the first plastic lens,
- the second plastic lens is A plastic lens based on the resin;
- the invention according to claim 3 is the scanning optical system according to claim 2, At least one of the first plastic lens and the second plastic lens is characterized in that a cross-sectional shape parallel to the main scanning direction is left-right asymmetric.
- the invention according to claim 4 is the scanning optical system according to any one of claims 1 to 3,
- the resin contains a light-resistant stabilizer.
- the invention according to claim 5 is the scanning optical system according to any one of claims 1 to 4, 0.1 ⁇ NA1 ⁇ t1 ⁇ 1 It is characterized by satisfying.
- the invention according to claim 6 is the scanning optical system according to claim 2, 0.1 ⁇ t2 / f1 ⁇ 0.25 It is characterized by satisfying.
- the invention according to claim 7 is the scanning optical system according to any one of claims 1 to 6,
- the main scanning focal length of the entire scanning imaging optical system is f [mm]
- the distance from the deflection optical system to the optical surface closest to the scanning surface of the scanning imaging optical system is ⁇ d [mm].
- the invention according to claim 8 is the scanning optical system according to any one of claims 1 to 7,
- the light source is a light source that emits two or more light beams.
- the invention according to claim 9 is the scanning optical system according to any one of claims 1 to 8, At least one of the first plastic lens and the second plastic lens is characterized in that a cross-sectional shape parallel to the main scanning direction is left-right asymmetric.
- the invention according to claim 10 is the scanning optical system according to any one of claims 1 to 9, It has an optical element provided with a diffractive structure on at least one optical surface.
- the invention according to claim 11 is the scanning optical system according to any one of claims 1 to 10,
- the deflection optical system includes a resonance mirror that deflects a light beam from the light source by swinging a reflecting surface in a sine manner.
- the invention according to claim 12 is the optical scanning device, A scanning optical system according to any one of claims 1 to 11 is provided.
- the invention according to claim 13 is the image forming apparatus,
- the optical scanning device according to claim 12 is provided.
- the deflection optical system is used to correct surface tilt. Since the beam once focused in the sub-scanning direction has a very strong power per unit area in the vicinity of the deflection optical system, it is understood that white turbidity is likely to occur when the first lens is irradiated with the light. It was.
- the above-mentioned resin is used as the base material to form the first plastic lens
- the numerical aperture in the sub-scanning direction of the light beam incident on the deflection optical system is set to NA1
- the gap between the deflection optical system and the first plastic lens is set to NA1
- the distance of t1 is t1
- the distance t1 between the deflection optical system and the first plastic lens is the principal ray that is perpendicular to the surface to be scanned among the reflected light from the deflection optical system, that is, on the optical axis, between the deflection optical system and the first plastic lens. It means the shortest distance from the optical surface on the deflection optical system side.
- the second lens is also preferably a plastic lens based on the resin.
- the first lens mainly has the power in the main scanning direction, if the distance between the first lens and the second lens is too wide, the intensity per unit area is increased as a result of light collection by the first lens. In order to effectively reduce white turbidity in the second lens, strong light will be irradiated to the second lens.
- the distance t2 between the first plastic lens and the second plastic lens is the shortest distance between the optical surface on the scanned surface side of the first plastic lens and the optical surface on the deflection optical system side of the second plastic lens on the optical axis. Means distance.
- FIG. 1 is a schematic configuration diagram of a laser printer which is an example of an image forming apparatus having an optical scanning device including a scanning optical system according to the present embodiment. It is a figure which shows the example of the scanning optical system arrange
- 6 is a schematic configuration diagram of a scanning optical system in Embodiment 4.
- FIG. 6 is a schematic configuration diagram of a scanning optical system in Embodiment 4.
- Light source device (light source) 5 Deflection optical system 6 First lens (first plastic lens) 7 Second lens (second plastic lens) 8 Scanning Imaging Optical System 50 Polygon Mirror 50A Resonant Mirror 100 Optical Scanning Device 101 Scanning Optical System (Optical Scanning Device) 200 Laser printer (image forming device) H Scanned surface
- FIG. 1 is a schematic configuration diagram of a laser printer 200 which is an example of an image forming apparatus having an optical scanning device including a scanning optical system according to the present embodiment.
- the laser printer 200 shown in FIG. 1 is capable of forming a color image, and has a writing unit, a developing unit, and the like for each of blue, green, red, and black.
- the scanning optical system according to the present embodiment is provided.
- the respective color toner images sequentially formed on the image carrier are superposed, and then transferred onto the recording paper at one time by the transfer unit to form a color image.
- a flexible endless belt-shaped photoconductor (hereinafter referred to as a belt photoconductor) 61 as an image carrier, scorotron chargers (hereinafter referred to as chargers) 62Y, 62M, 62C and 62K, optical scanning
- chargers scorotron chargers
- a plurality of image forming units (four sets in the figure) arranged in a column are constituted by the devices 100Y, 100M, 100C, 100K and the developing devices 64Y, 64M, 64C, 64K.
- a scanning optical system is provided in each of the optical scanning devices 100Y, 100M, 100C, and 100K.
- the belt photoreceptor 61 is stretched around the drive roller 71 and the rotation rollers 72 and 73, is in a tensioned state by the action of the tension roller 74, and is locally abutted by the backup member 75 provided on the inner peripheral surface. It rotates clockwise as shown.
- the backup member 75 is in contact with the back surface of the belt photosensitive member 61, develops the developer carrier (hereinafter referred to as a developing sleeve) 641 (Y, M, C, K) and the optical scanning device 100 (Y, M , C, K).
- the drive motor rotates to rotate the belt photoreceptor 61 in the clockwise direction through the drive roller 71, and the potential is applied to the belt photoreceptor 61 by the charging action of the charger 62Y. Is started.
- the optical scanning device 100Y starts exposure by an electrical signal corresponding to the first color signal, that is, the yellow (Y) image signal, and the belt photoreceptor 61 rotates (sub-scan). ) To form an electrostatic latent image corresponding to the yellow (Y) image of the developed image on the photosensitive layer on the surface.
- the latent image is reversely developed by the developing device 64Y in a non-contact state with the developer adhered and conveyed on the developing sleeve 641Y which is a developer carrying member, and yellow (Y) toner according to the rotation of the belt photoreceptor 1 An image is formed.
- a potential is applied to the belt photoreceptor 61 by the charging action of the charger 62M on the yellow (Y) toner image, and corresponds to the second color signal of the optical scanning device 100M, that is, the magenta (M) image signal. Exposure by an electrical signal is performed, and a magenta (M) toner image is formed on top of the yellow (Y) toner image by non-contact reversal development by the developing device 64M.
- a cyan (C) toner image corresponding to the third color signal is further formed by the charger 62C, the optical scanning device 100C, and the developing device 64C.
- a black (K) toner image corresponding to the fourth color signal is sequentially superimposed by the charger 62K, the optical scanning device 100K, and the developing device 64K, and is formed on the peripheral surface within one rotation of the belt photoreceptor 61. A color toner image is formed.
- the developing sleeves 641Y, 641M, 641C, and 641K are respectively developed with a DC bias having the same polarity as the charging of the belt photosensitive member 1 or an AC applied to the DC bias.
- Non-contact reversal development is performed with a two-component developer applied on the developing sleeve 641 (Y, M, C, K) to which a bias is applied, and toner is applied to the exposed portion on the belt photoreceptor 61 with the conductive layer grounded.
- the color toner image formed on the peripheral surface of the belt photoconductor 61 is discharged by the pre-transfer exposure device after the potential of the adhering toner is made uniform by the charger, and is a paper feeding device in the transfer portion.
- the paper is fed from the paper feed cassettes 80A, 80B or the manual paper feed unit 80C by the paper feed means 81A, 81B, 81C, conveyed to the registration roller pair 83, and the toner on the belt photoreceptor 61 is driven by the registration roller pair 83.
- the image is transferred onto a transfer sheet fed in synchronization with the image area by a transfer device (transfer roller) 67 disposed opposite to a lower portion of a driving roller 71 for driving the belt photoreceptor 61.
- a photo sensor 66 is installed at a predetermined position facing the belt photoreceptor 61 stretched between the driving roller 71 and the rotation roller 72 between the registration roller pair 83 and the transfer roller 67.
- the photo sensor 66 detects a joint of the belt photosensitive member 61 and a registration mark formed on the belt photosensitive member 61, and is a sensor composed of a pair of light emitting unit and light receiving unit.
- the transfer material (transfer paper) that has received the transfer of the toner image is separated from the peripheral surface of the belt photoreceptor 61 along the curvature of the drive roller 71, and then conveyed to the fixing device 84.
- the toner is welded and fixed on the transfer paper after being pressed and discharged from the fixing device 84, and is conveyed by a pair of discharge rollers 85 A, 85 B, and 85 C, and is transferred to a discharge tray 86 provided at the upper portion, and a toner image surface on the transfer paper. Is discharged with the bottom face down.
- the image carrier is one belt photoconductor 61, but four photoconductor drums corresponding to each color may be provided.
- FIG. 2 is a diagram showing an example of the scanning optical system 101 arranged in the optical scanning device 100. As shown in FIG.
- the optical scanning device 100 includes a scanning optical system 101 that scans laser light in the main scanning direction y.
- the scanning optical system 101 includes the light source device 1 and the line imaging optical system. 4.
- a deflection optical system 5 and a scanning imaging optical system 8 are provided.
- the light source device 1 emits a light beam having a wavelength of 500 nm or less.
- the line imaging optical system 4 includes a collimator lens 2 and a cylindrical lens 3, and forms a light beam from the light source device 1 on the deflection optical system 5 as a line image that is long in the main scanning corresponding direction y1.
- the main scanning corresponding direction y1 is a direction corresponding to the main scanning direction y, and in the present embodiment, the optical axis direction x and the sub scanning direction z (the rotation axis direction of the polygon mirror) of the light source device 1.
- the direction is orthogonal to.
- the deflection optical system 5 has a polygon mirror 50 that deflects the light beam from the light source device 1.
- This polygon mirror 50 has a deflecting reflection surface in the vicinity of the image formation position of the line image by the line image forming optical system 4, and by rotating the reflection surface about a rotation axis parallel to the sub-scanning direction z.
- the light beam from the line imaging optical system 4 is reflected and deflected at a constant angular velocity, and is scanned in the main scanning direction y.
- the reflecting surface of the polygon mirror 50 and the surface to be scanned H have a geometric optical conjugate relationship.
- the scanning imaging optical system 8 forms a light spot on the scanned surface H by condensing the deflected light beam from the polygon mirror 50 toward the scanned surface H. Aberration correction is performed so as to scan at a constant speed on H.
- the scanning imaging optical system 8 includes a first lens 6 and a second lens 7 in order from the polygon mirror 50 side.
- the first lens 6 is adjacent to the polygon mirror 50, and is a positive meniscus lens having a concave surface facing the polygon mirror 50 side.
- the first lens 6 may have a shape showing a different power, for example, an annular shape, as it moves away from the optical axis in the main scanning direction y.
- the second lens 7 is a lens having an anamorphic surface on at least one surface.
- 3A and 3B are explanatory diagrams in the case where the optical surface on the light source side of the second lens 7, that is, the third surface (see FIG. 2) in the scanning imaging optical system 8 is an anamorphic surface.
- the principal ray that is perpendicular to the surface to be scanned H out of the reflected light from the polygon mirror 50, that is, the optical axis of the scanning imaging optical system 8 is the “reference axis X”, and the reference axis X, the anamorphic surface
- the second lens is defined as an axis that is perpendicular to the reference axis X and passes through the intersection of the two and defined as the “Y axis” and the axis that is perpendicular to the reference axis X and the Y axis is defined as the “Z axis”.
- the anamorphic surface 7 is a surface that can be rotated about an axis K located at a radius of curvature with respect to the cross section of the reference axis X in the sub-scanning direction z.
- the deviation amount ⁇ X between the point P in the off-axis region and the Y axis is expressed by the following “formula (i)”.
- FIG. 4 is a schematic diagram showing a cross-sectional shape of the second lens 7 perpendicular to the Y-axis which is the sub-scanning direction.
- 4A shows a cross section taken along the line CC (on the X axis) shown in FIG. 3B
- FIG. 4B shows a cross section taken along the line DD shown in FIG. 3B. Is shown.
- R s R 0 ⁇ X (ii)
- R 0 is a radius of curvature in the ZX plane including the reference axis X
- R s in the ZX plane changes as the distance from the reference axis X increases.
- the above anamorphic surface has an arc or non-arc in the ZX plane.
- the optical surface may be shifted and / or tilted with respect to the reference axis X as shown in FIG.
- the shape of the anamorphic surface is not limited to the above formula (i), and the surface of another shape in which the radius of curvature in the sub-scanning direction z changes independently from the main scanning direction y as the distance from the reference axis X (for example, , Free-form surface).
- the first lens 6 may also be provided with an anamorphic surface.
- At least one of the first lens 6 and the second lens 7 described above is left and right on the side opposite to the light source device 1 and the opposite side (see FIG. 1) with respect to the center line in a cross section parallel to the main scanning direction y. It may have an asymmetric optical surface. In this case, even when the reflecting surface moves due to the rotation of the polygon mirror 50, the field curvature (particularly the field curvature in the sub-scanning direction z) due to the movement of the reflecting surface is relative to the z axis. Therefore, it is possible to suppress left-right asymmetry.
- the first lens 6 and the second lens 7 may have a diffractive structure on at least one optical surface.
- the resin lens has a larger variation in the refractive index due to the environmental temperature and the wavelength change of the light source than the glass lens, and the image plane position and the magnification change due to the variation in the refractive index, causing image degradation.
- the change in the refractive index of the lens due to the wavelength change is larger than in the case of the infrared wavelength or red wavelength, and its influence cannot be ignored.
- the first lens 6 and the second lens 7 have a diffractive structure on at least one optical surface, even if the first lens 6 and the second lens 7 are made of resin, the refractive index due to temperature change. The focus shift at the image plane position due to the change can be suppressed.
- the line imaging optical system 4 is provided in the polygon mirror 50 for correcting surface tilt. Therefore, when the distance between the polygon mirror 50 and the first lens 6 is short, the light flux immediately after reflection by the polygon mirror 50 (in the sub-scanning direction z). A light beam having a strong power immediately after being condensed enters the first lens 6, and the first lens 6 becomes clouded.
- the scanning coupling optical system 8 is as described above. 0.05 ⁇ NA1 ⁇ t1 ⁇ 1.5 Since the plastic material described later is used for the first lens 6, white turbidity of the first lens 6 can be prevented.
- NA1 ⁇ t1 ⁇ 0.05
- NA1 ⁇ t1 ⁇ 0.05
- the distance between the polygon mirror 50 and the first lens 6 of the scanning imaging optical system 8 is narrowed.
- light having a high intensity per unit area is transmitted through the first lens 6.
- the lens 6 is likely to become clouded.
- 1.5 ⁇ NA1 ⁇ t1 In this case, although the white turbidity hardly occurs in the first lens 6 and the like, the entire optical scanning device (optical scanning optical system) 101 becomes large.
- the power (refractive power) in the main scanning direction y is mainly used as a polygon mirror. Since the first lens 6 on the 50 side has the light beam focused by the first lens 6 enters the second lens 7 on the image plane side, the beam intensity (the amount of light per unit area) is high. If the irradiation is performed for a long time, the second lens 7 becomes clouded.
- the scanning imaging optical system 8 has 0.05 ⁇ t2 / f1 ⁇ 0.4 as described above. And f1 ⁇ 0 Therefore, white turbidity of the second lens 7 can be prevented.
- the scanning imaging optical system 8 sets the main scanning focal length of the entire scanning imaging optical system 8 to f [mm], and is the most scanned surface H side in the scanning imaging optical system 8 from the polygon mirror 50. If the distance to the optical surface (in this embodiment, the optical surface to be scanned H side of the second lens 7) is ⁇ d [mm] 0.25 ⁇ ⁇ d / f ⁇ 0.5 Meet. As a result, the entire scanning imaging optical system 8 can be made compact and the manufacturing cost can be reduced. In addition, since the thickness deviation ratio between the central portion and the peripheral portion of the first lens 6 and the second lens 7 can be suppressed, a light amount difference is generated at each imaging position, unlike the case where the thickness deviation ratio is large. Unevenness can be prevented from occurring.
- the entire lens of the scanning imaging optical system 8 becomes large. Further, the thickness deviation ratio of the first lens 6 and the second lens 7 is increased, and the light passing through the lens central portion and the light passing through the lens peripheral portion have different lens passing distances. Uneven light intensity will occur. In particular, such a problem becomes prominent when blue wavelength light is used as a light beam and a resin lens is used as the first lens 6 and the second lens 7 because the internal absorptance of the lens is high. . Also, ⁇ d / f ⁇ 0.25 If this is the case, it will be difficult to achieve basic optical performance such as compatibility between constant speed scanning and good field curvature.
- At least the material of the base material of the first lens 6 is a plastic material, and preferably the material of the base material of the second lens 7 is also a plastic material.
- the plastic material of the first lens 6 and the second lens 7 it is preferable that a resin composition having excellent light resistance and heat resistance against a short wavelength blue-violet laser is used as a base material.
- a resin composition having excellent light resistance and heat resistance against a short wavelength blue-violet laser is used as a base material.
- a copolymer resin composed of an ⁇ -olefin and a cyclic olefin is preferably used.
- the cyclic olefin in the copolymer constituting the resin composition is preferably a cyclic olefin represented by the following general formula (I) or (II).
- n is 0 or 1
- m is 0 or a positive integer
- k is 0 or 1.
- the ring represented by k is a 6-membered ring, and when k is 0, this ring is a 5-membered ring.
- R 1 to R 18 and R a and R b are each independently a hydrogen atom, a halogen atom or a hydrocarbon group.
- the halogen atom is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.
- the hydrocarbon group usually includes an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, or an aromatic hydrocarbon group.
- examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, an amyl group, a hexyl group, an octyl group, a decyl group, a dodecyl group, and an octadecyl group.
- These alkyl groups may be substituted with a halogen atom.
- Examples of the cycloalkyl group include a cyclohexyl group, and examples of the aromatic hydrocarbon group include a phenyl group and a naphthyl group.
- R 15 and R 16 are R 17 and R 18
- R 15 and R 17 are R 16 and R 18
- R 15 and R 18 are R 16 and R 17
- R 15 and R 18 may be bonded to each other (in cooperation with each other) to form a monocyclic or polycyclic group, and the monocyclic or polycyclic ring thus formed is a double bond You may have.
- Specific examples of the monocyclic or polycyclic ring formed here include the following.
- the carbon atom numbered 1 or 2 represents a carbon atom bonded to R 15 (R 16 ) or R 17 (R 18 ) in the general formula (I).
- R 15 and R 16 , or R 17 and R 18 may form an alkylidene group.
- alkylidene groups are usually alkylidene groups having 2 to 20 carbon atoms, and specific examples of such alkylidene groups include ethylidene, propylidene and isopropylidene groups.
- R 21 to R 39 are each independently a hydrogen atom, a halogen atom, a hydrocarbon group or an alkoxy group.
- the halogen atom is the same as the halogen atom in the general formula (I).
- the hydrocarbon group generally include an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 15 carbon atoms, and an aromatic hydrocarbon group. More specifically, examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, an amyl group, a hexyl group, an octyl group, a decyl group, a dodecyl group, and an octadecyl group. These alkyl groups may be substituted with a halogen atom.
- Examples of the cycloalkyl group include a cyclohexyl group.
- Examples of the aromatic hydrocarbon group include an aryl group and an aralkyl group. Specifically, the phenyl group, the tolyl group, the naphthyl group, the benzyl group, and the phenylethyl group. Etc.
- alkoxy group examples include a methoxy group, an ethoxy group, and a propoxy group.
- the carbon atom to which R 29 and R 30 are bonded and the carbon atom to which R 33 is bonded or the carbon atom to which R 31 is bonded are directly or an alkylene group having 1 to 3 carbon atoms. It may be connected via. That is, when the two carbon atoms are bonded via an alkylene group, R 29 and R 33 or R 30 and 31 are combined with each other to form a methylene group (—CH 2 — ), An ethylene group (—CH 2 CH 2 —), a propylene group (—CH 2 CHCH 3 —) or a trimethylene group (—CH 2 CH 2 CH 2 —).
- R 35 and R 32 or R 35 and R 39 may be bonded to each other to form a monocyclic or polycyclic aromatic ring.
- R 35 and R 32 or R 35 and R 39 may be bonded to each other to form a monocyclic or polycyclic aromatic ring.
- the following aromatic rings formed by R 35 and R 32 are exemplified.
- cyclic olefin represented by the above general formula (I) or (III) include bicyclo-2-heptene derivatives (bicyclohept-2-ene derivatives), tricyclo-3-decene derivatives, tricyclo- 3-undecene derivative, tetracyclo-3-dodecene derivative, pentacyclo-4-pentadecene derivative, pentacyclopentadecadiene derivative, pentacyclo-3-pentadecene derivative, pentacyclo-3-hexadecene derivative, pentacyclo-4-hexadecene derivative, hexacyclo-4 -Heptadecene derivatives, heptacyclo-5-eicosene derivatives, heptacyclo-4-eicosene derivatives, heptacyclo-5-heneicosene derivatives, o
- Examples of the ⁇ -olefin constituting the copolymer include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, -Linear ⁇ -olefins such as octadecene and 1-eicosene; branched ⁇ -olefins such as 4-methyl-1-pentene, 3-methyl-1-pentene and 3-methyl-1-butene.
- An ⁇ -olefin having 2 to 20 carbon atoms is preferable.
- Such a linear or branched ⁇ -olefin may be substituted with a substituent, and may be used singly or in combination of two or more.
- substituents include various substituents, but typical examples include alkyl, aryl, anilino, acylamino, sulfonamido, alkylthio, arylthio, alkenyl, cycloalkyl, cycloalkenyl, alkynyl, heterocycle, Alkoxy, aryloxy, heterocyclic oxy, siloxy, amino, alkylamino, imide, ureido, sulfamoylamino, alkoxycarbonylamino, aryloxycarbonylamino, alkoxycarbonyl, aryloxycarbonyl, heterocyclic thio, thioureido, hydroxyl and mercapto As well as spiro compound residues, bridged hydrocarbon compound residues, sulfonyl, sulfinyl, sulfonyloxy, sulfamoyl, phosphoryl, carbamoyl, acyl,
- the alkyl group preferably has 1 to 32 carbon atoms and may be linear or branched.
- the aryl group is preferably a phenyl group.
- acylamino group alkylcarbonylamino group, arylcarbonylamino group; as sulfonamide group, alkylsulfonylamino group, arylsulfonylamino group; alkylthio group, alkyl component in arylthio group, aryl component is the above alkyl group, aryl group Is mentioned.
- the alkenyl group preferably has 2 to 23 carbon atoms, and the cycloalkyl group preferably has 3 to 12 carbon atoms, particularly 5 to 7 carbon atoms.
- the alkenyl group may be linear or branched.
- the cycloalkenyl group preferably has 3 to 12 carbon atoms, particularly 5 to 7 carbon atoms.
- the ureido group is preferably an alkylureido group or arylureido group; the sulfamoylamino group is preferably an alkylsulfamoylamino group or an arylsulfamoylamino group; Is 2-furyl, 2-thienyl, 2-pyrimidinyl, 2-benzothiazolyl, etc .; the saturated heterocyclic ring is preferably a 5- to 7-membered member, specifically tetrahydropyranyl, tetrahydrothiopyranyl, etc .; heterocyclic oxy group Are preferably those having a 5- to 7-membered heterocyclic ring, such as 3,4,5,6-tetrahydropyranyl-2-oxy, 1-phenyltetrazol-5-oxy, etc .; 7-membered heterocyclic thio groups are preferred, such as 2-pyridylthio, 2-benzothiazolylthio, 2,4-
- sulfonyl group an alkylsulfonyl group, an arylsulfonyl group, a halogen-substituted alkylsulfonyl group, a halogen-substituted arylsulfonyl group, etc .
- a sulfinyl group an alkylsulfinyl group, an arylsulfinyl group, etc .
- sulfonyloxy group an alkylsulfonyloxy group , Arylsulfonyloxy groups, etc .
- sulfamoyl groups N, N-dialkylsulfamoyl groups, N, N-diarylsulfamoyl groups, N-alkyl-N-arylsulfamoyl groups, etc .
- phosphoryl groups alkoxy A phosphoryl group, an aryloxyphosphoryl group
- substituents such as trifluoromethyl, heptafluoro-i-propyl, nonylfluoro-t-butyl, tetrafluoroaryl groups, pentafluoroaryl groups and the like are also preferably used. Furthermore, these substituents may be substituted with other substituents.
- the acyclic monomer content in the copolymer of the present invention is preferably 20% by mass or more from the viewpoint of moldability, more preferably 25% or more and 90% or less, and 30% or more and 85% or less. More preferably it is.
- the glass transition temperature (Tg) of the polymer or copolymer of the present invention is preferably 80 to 250 ° C., more preferably 90 to 220 ° C., and most preferably 100 to 200 ° C.
- the number average molecular weight (Mn) is a polystyrene conversion value measured by gel permeation chromatography (GPC), preferably 10,000 to 1,000,000, more preferably 20,000 to 500,000, most preferably Is in the range of 50,000 to 300,000.
- the molecular weight distribution is preferably 2.0 or less when expressed as a ratio (Mw / Mn) between the above Mn and a polystyrene-equivalent weight average molecular weight (Mw) similarly measured by GPC.
- Mw / Mn is more preferably 1.8 or less, and particularly preferably 1.6 or less.
- the temperature at the time of polymerization is selected from the range of 0 to 200 ° C., preferably 50 to 150 ° C., and the pressure is selected from the range of atmospheric pressure to 100 atm. Moreover, the molecular weight of the produced
- the olefin resin of the present invention may be a polymer synthesized from a one-component cyclic monomer, but preferably a copolymer synthesized from two or more cyclic monomers or a cyclic monomer and an acyclic monomer. To be elected.
- This copolymer may be produced using monomers having 100 or more components, but the mixing of monomers is preferably 10 or less from the viewpoint of production efficiency polymerization stability. More preferred is 5 components or less.
- the obtained copolymer may be a crystalline polymer or an amorphous polymer, but preferably an amorphous polymer.
- a method for hydrogenating the carbon-carbon unsaturated bonds (including aromatic rings) of the polymer and copolymer of the present invention known methods can be used. Among them, the hydrogenation rate is increased, and the hydrogenation rate is increased.
- a catalyst containing at least one metal selected from nickel, cobalt, iron, titanium, rhodium, palladium, platinum, ruthenium and rhenium is used in an organic solvent. It is preferable to perform a hydrogenation reaction.
- the hydrogenation catalyst either a heterogeneous catalyst or a homogeneous catalyst can be used.
- the heterogeneous catalyst can be used in the form of a metal or a metal compound or supported on a suitable carrier.
- the support include activated carbon, silica, alumina, calcium carbide, titania, magnesia, zirconia, diatomaceous earth, silicon carbide and the like.
- the supported amount of the catalyst is a metal content with respect to the total mass of the catalyst, usually 0.01. The range is from 80 to 80% by mass, preferably from 0.05 to 60% by mass.
- the homogeneous catalyst is a catalyst in which a nickel, cobalt, titanium or iron compound and an organometallic compound (for example, an organoaluminum compound or an organolithium compound) are combined, or an organometallic complex catalyst such as rhodium, palladium, platinum, ruthenium or rhenium. Can be used.
- organometallic complex catalyst such as rhodium, palladium, platinum, ruthenium or rhenium.
- These hydrogenation catalysts can be used alone or in combination of two or more, and the amount used is usually 0.01 to 100 parts by mass, preferably 0, per 100 parts by mass of the polymer. .05 to 50 parts by mass, more preferably 0.1 to 30 parts by mass.
- the hydrogenation reaction temperature is usually from 0 to 300 ° C., preferably from room temperature to 250 ° C., particularly preferably from 50 to 200 ° C.
- the hydrogen pressure is usually 0.1 MPa to 30 MPa, preferably 1 MPa to 20 MPa, more preferably 2 MPa to 15 MPa.
- the hydrogenation rate of the obtained hydrogenated product is usually 90% or more, preferably 95% or more of the carbon-carbon unsaturated bond of the main chain as measured by 1H-NMR. Preferably it is 97% or more.
- the hydrogenation rate is low, optical properties such as transmittance, low birefringence, and thermal stability of the resulting polymer are lowered.
- the solvent used in the hydrogenation reaction of the polymer and copolymer of the present invention may be any solvent as long as it dissolves the polymer and copolymer of the present invention and the solvent itself is not hydrogenated.
- ethers such as tetrahydrofuran, diethyl ether, dibutyl ether and dimethoxyethane
- aromatic hydrocarbons such as benzene, toluene, xylene and ethylbenzene
- aliphatic hydrocarbons such as pentane, hexane and heptane, cyclopentane, cyclohexane and methylcyclohexane
- Aliphatic cyclic hydrocarbons such as dimethylcyclohexane and decalin
- halogenated hydrocarbons such as methylene dichloride, dichloroethane, dichloroethylene, tetrachloroethane, chlorobenzene, and trichlorobenzene.
- the polymer or copolymer hydrogenated product of the present invention can be produced by isolating the polymer or copolymer hydrogenated product from the polymer solution and then dissolving it again in the solvent. It is also possible to employ a method of performing a hydrogenation reaction by adding a hydrogenation catalyst composed of the above organometallic complex and an organoaluminum compound. After completion of the hydrogenation reaction, the hydrogenation catalyst remaining in the polymer can be removed by a known method. For example, an adsorption method using an adsorbent, a method in which an organic acid such as lactic acid, a poor solvent, and water are added to a solution using a good solvent, and the system is extracted and removed at room temperature or under heating.
- a basic compound such as trimethylenediamine, aniline, pyridine, ethanediamide, sodium hydroxide, etc.
- the method for recovering the polymer hydride from the polymer or copolymer hydrogenated solution of the present invention is not particularly limited, and a known method can be used.
- the reaction solution is discharged into a poor solvent under stirring to solidify the polymer hydride, and recovered by filtration, centrifugation, decantation, etc., and steam is blown into the reaction solution to remove the polymer hydride.
- steam is blown into the reaction solution to remove the polymer hydride.
- Examples thereof include a steam stripping method for precipitation and a method for directly removing the solvent from the reaction solution by heating.
- the hydrogenation rate can be easily achieved as 90% or more, and can be 95% or more, particularly 99% or more, and the resulting polymer or copolymer hydrogenation
- the product is not easily oxidized and becomes an excellent polymer or copolymer hydrogenated product.
- Method for preparing resin composition The preparation method of the resin composition in this embodiment is demonstrated.
- the resin composition in the present embodiment is preferably subjected to a specific processing before the molding step (molding process), and a plasticizer, an antioxidant, and other additives that are usually added to the resin at the stage of the processing.
- An agent may be added.
- Examples of the preparation method of the resin composition in the present embodiment include a kneading process or a process of dissolving the mixture in a solvent, removing the solvent, and drying to obtain a composition, and the like.
- a more preferable preparation method is kneading. Is a process.
- blending of normal resin can be used as a kneading
- a roll, a Banbury mixer, a twin-screw kneader, a kneader ruder or the like can be used, and a Banbury mixer, a twin-screw kneader, a kneader ruder or the like is preferable.
- an apparatus capable of kneading in a closed system is preferably used, and more preferably, the kneading process is performed by inert gasification such as nitrogen or argon.
- additives also referred to as compounding agents
- compounding agents can be added as necessary.
- stabilizers such as antioxidants, heat stabilizers, light stabilizers, weather stabilizers, UV absorbers and near infrared absorbers
- resin modifiers such as lubricants and plasticizers
- Colorants such as dyes and pigments
- antistatic agents flame retardants, fillers and the like.
- Antioxidant The antioxidant used in the present invention will be described.
- antioxidants examples include phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, etc.
- phenolic antioxidants particularly alkyl-substituted phenolic antioxidants are preferable.
- the amount is preferably 0.001 to 5 parts by mass, more preferably 0.01 to 1 part by mass with respect to parts by mass.
- the light-resistant stabilizer examples include benzophenone-based light-resistant stabilizer, benzotriazole-based light-resistant stabilizer, hindered amine-based light-resistant stabilizer, etc., but in the present invention, from the viewpoint of lens transparency, color resistance, etc., hindered amine-based It is preferable to use a light-resistant stabilizer.
- hindered amine light-resistant stabilizers those having a polystyrene-equivalent Mn measured by GPC using THF as a solvent are preferably 1000 to 10,000, more preferably 2000 to 5000, Those of 2800 to 3800 are particularly preferred.
- Mn is too small, when HALS is blended by heat-melting and kneading into a block copolymer, a predetermined amount cannot be blended due to volatilization, foaming or silver streak occurs during heat-melt molding such as injection molding, etc. Processing stability decreases. Further, when the lens is used for a long time with the lamp turned on, a volatile component is generated as a gas from the lens. Conversely, if Mn is too large, the dispersibility in the block copolymer is lowered, the transparency of the lens is lowered, and the effect of improving light resistance is reduced. Therefore, in the present invention, a lens excellent in processing stability, low gas generation and transparency can be obtained by setting the HALS Mn in the above range.
- HALS include polycondensates of dibutylamine, 1,3,5-triazine and N, N′-bis (2,2,6,6-tetramethyl-4-piperidyl) butylamine, poly [ ⁇ (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl ⁇ ⁇ (2,2,6,6-tetramethyl-4-piperidyl) imino ⁇ hexamethylene ⁇ (2,2,6,6-tetramethyl-4-piperidyl) imino ⁇ ], a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, etc. Those having Mn of 2,000 to 5,000 are preferred.
- UV absorber 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2H-benzotriazol-2-yl) -4-methyl-6- (3,4,5,6) -Tetrahydrophthalimidylmethyl) phenol, 2- (2H-benzotriazol-2-yl) -4,6-bis (1-methyl-1-phenylethyl) phenol, etc. from the viewpoint of heat resistance and low volatility preferable.
- the blending amount of the light-resistant stabilizer or the ultraviolet absorber with respect to the resin in the present invention is preferably 0.01 to 20 parts by mass, more preferably 0.02 to 15 parts by mass, particularly preferably 100 parts by mass of the polymer. Is 0.05 to 10 parts by mass. If the amount added is too small, the effect of improving light resistance cannot be obtained sufficiently, and coloring occurs when used outdoors for a long time. On the other hand, when the blending amount of HALS is too large, a part of the HALS is generated as a gas, or the dispersibility in the resin is lowered, and the transparency of the lens is lowered.
- the present invention comprises the resin composition of the present invention and at least one compounding agent selected from the group consisting of (1) a soft polymer, (2) an alcoholic compound, and (3) an organic or inorganic filler.
- a resin composition is provided. By blending these compounding agents, it is possible to prevent white turbidity in a high temperature and high humidity environment for a long time without degrading various properties such as transparency, low water absorption, and mechanical strength.
- (1) Soft polymer The soft polymer used in the present invention is usually a polymer having a Tg of 30 ° C. or lower. When a plurality of Tg are present, at least the lowest Tg is preferably 30 ° C. or lower. .
- the soft polymer may have a cross-linked structure or may have a functional group introduced by a modification reaction.
- the alcoholic compound is a compound having at least one non-phenolic hydroxyl group in the molecule, and preferably has at least one hydroxyl group and at least one ether bond or ester bond.
- Specific examples of such compounds include, for example, dihydric or higher polyhydric alcohols, more preferably trihydric or higher polyhydric alcohols, and even more preferably one of the hydroxyl groups of a polyhydric alcohol having 3 to 8 hydroxyl groups is an ether. Examples thereof include alcoholic ether compounds and alcoholic ester compounds that have been converted into or esterified.
- dihydric or higher polyhydric alcohol examples include polyethylene glycol, glycerol, trimethylolpropane, pentaerythritol, diglycerol, triglycerol, dipentaerythritol, 1,6,7-trihydroxy-2,2-di (hydroxy).
- Methyl) -4-oxoheptane, sorbitol, 2-methyl-1,6,7-trihydroxy-2-hydroxymethyl-4-oxoheptane, 1,5,6-trihydroxy-3-oxohexanepentaerythritol, tris (2-Hydroxyethyl) isocyanurate and the like can be mentioned, and in particular, a polyhydric alcohol having a valence of 3 or more, more preferably a polyhydric alcohol having 3 to 8 hydroxyl groups.
- glycerol, diglycerol, triglycerol or the like capable of synthesizing an alcoholic ester compound containing ⁇ , ⁇ -diol is preferable.
- Polyhydric alcohol compounds are used alone or in combination of two or more.
- the molecular weight of the polyhydric alcohol compound is not particularly limited, but is usually from 500 to 2000, preferably from 800 to 1500, and the decrease in transparency is small.
- Organic or inorganic filler As the organic filler, ordinary organic polymer particles or crosslinked organic polymer particles can be used.
- polyolefins such as polyethylene and polypropylene; halogen-containing materials such as polyvinyl chloride and polyvinylidene chloride Vinyl polymers; polymers derived from ⁇ , ⁇ -unsaturated acids such as polyarylate and polymethacrylate; polymers derived from unsaturated alcohols such as polyvinyl alcohol and polyvinyl acetate; polyethylene oxide or bisglycidyl ether Polymers derived from: aromatic condensation polymers such as polyphenylene oxide, polycarbonate and polysulfone; polyurethanes; polyamides; polyesters; aldehyde / phenolic resins; natural polymer compound particles or crosslinked particles It can gel.
- the inorganic filler examples include Group 1 element compounds such as lithium fluoride and borax (sodium borate hydrate); Group 2 element compounds such as magnesium carbonate, magnesium phosphate, calcium carbonate, strontium titanate, and barium carbonate; Titania), Group 4 element compounds such as titanium monoxide; Group 6 element compounds of molybdenum dioxide and molybdenum trioxide; Group 7 element compounds such as manganese chloride and manganese acetate; Group 8-10 elements compounds such as cobalt chloride and cobalt acetate Group 11 element compounds such as cuprous iodide; Group 12 element compounds such as zinc oxide and zinc acetate; Group 13 such as aluminum oxide (alumina), aluminum fluoride, aluminosilicate (alumina silicate, kaolin, kaolinite) Elemental compounds; silicon oxide (silica, silica gel), graphite Carbon, graphite, Group 14 element compound such as glass; kernal stones, kainite, mica (mica, Kin'unmo)
- the compounding amount of the compounds (1) to (3) is determined by the combination of the copolymer and the compound to be compounded. However, generally, if the compounding amount is too large, the glass transition temperature and transparency of the composition are greatly reduced. It is unsuitable for use as an optical material. Moreover, if there are too few compounding quantities, the cloudiness of a molding may be produced under high temperature and high humidity.
- the blending amount is usually 0.01 to 10 parts by weight, preferably 0.02 to 5 parts by weight, particularly preferably 0.05 to 2 parts by weight with respect to 100 parts by weight of the copolymer. When the blending amount is too small, the effect of preventing white turbidity in a high temperature and high humidity environment cannot be obtained, and when the blending amount is too large, the heat resistance and transparency of the molded product are lowered.
- the composition of the alicyclic structure-containing resin can be obtained by appropriately mixing the above components.
- the mixing method is not particularly limited as long as each component is sufficiently dispersed in the hydrocarbon polymer.
- the resin is melted with a mixer, a twin-screw kneader, a roll, a Brabender, an extruder, or the like. Examples thereof include a method of kneading in a state, a method of dissolving and dispersing in a suitable solvent and solidifying.
- biaxial kneader When a biaxial kneader is used, it is often used as a molding material that is usually extruded after being kneaded into a rod shape in a molten state, cut into an appropriate length with a strand cutter, and pelletized.
- the scanning imaging optical system 8 is 0.05 ⁇ t2 / f1 ⁇ 0.4, And f1 ⁇ 0
- the above-mentioned plastic material is used for the second lens 7, preferably, 0.1 ⁇ t2 / f1 ⁇ 0.25 Therefore, white turbidity of the second lens 7 can be prevented.
- the scanning imaging optical system 8 has 0.25 ⁇ ⁇ d / f ⁇ 0.5. Therefore, the entire scanning imaging optical system 8 can be made compact and the manufacturing cost can be reduced. In addition, since the thickness deviation ratio between the central portion and the peripheral portion of the first lens 6 and the second lens 7 can be suppressed, a light amount difference is generated at each imaging position, unlike the case where the thickness deviation ratio is large. Unevenness can be prevented from occurring.
- the light source device 1 that emits one light beam is used, but a light source device that emits a plurality of light beams may be used.
- a light source device that emits a plurality of light beams may be used.
- the first lens 6 and the second lens 7 are lenses to which a light-resistant agent is added. Therefore, even when simultaneous irradiation of the same position with a plurality of light beams is performed, the whitening of the lens is prevented. can do.
- a diffractive structure may be provided on at least one optical surface of the first lens 6 and the second lens 7, but the optical surface of the collimator lens 2 or the cylindrical lens 3 in the line imaging optical system 4 is provided. It is good also as providing, and it is good also as providing in the optical surface of the other optical element arrange
- a diffractive structure is preferably arranged on the scanning surface H side with respect to the deflection optical system 5.
- the deflecting optical system 5 has been described as deflecting the light beam by the polygon mirror 50. However, as shown in FIGS. Mirror) 50A may be used.
- a resonant mirror 50A is used in the deflecting optical system 5
- an arcsin ⁇ lens is generally used as the lens of the scanning imaging optical system 8, and therefore, the light beam passing through the central portion of this lens and As a result of the NA being different from the luminous flux passing through the outer peripheral portion, there is a problem that the beam becomes thick in the main scanning direction y at a high image height.
- ⁇ wavelength n1: first lens refractive index n2: second lens refractive index t1: distance from the polygon mirror to the first lens [mm] d1: First lens center thickness [mm] (see FIG. 1) t2: Distance between the first lens and the second lens [mm] d2: Second lens center thickness [mm] (see FIG. 1) d3: Distance from the final surface of the second lens to the image plane [mm] T2: Tilt amount [degree] around the z-axis of the second lens (see FIG. 3B) S2: Y-axis direction shift amount [mm] of the second lens (see FIG.
- TOPAS5013LS-01 manufactured by Polyplastics Co., Ltd.
- the specific shapes of the first lens 6 and the second lens 7 were aspherical shapes expressed by the following formula (iii) and Table 2.
- the unit of the values in the table is [mm].
- h is a distance [mm] in the Y-axis direction in FIG. 3B
- K is a conical coefficient
- a 4 , A 6 , A 8 , A 10 , and A 12 are aspherical coefficients.
- Example (2) As the scanning optical system of Example (2), those shown in Table 3 below were produced.
- TOPAS5013LS-01 manufactured by Polyplastics Co., Ltd.
- the specific shapes of the first lens 6 and the second lens 7 were aspherical shapes expressed by the above formula (iii) and Table 4 below.
- the unit of the values in the table is [mm].
- Example (3) As the scanning optical system of Example (3), those shown in Table 5 below were produced.
- the specific shape of the first lens 6 was a shape expressed by the above formula (iii) and Table 6 below. That is, the shape of the first lens 6 is an aspherical shape that can be expressed by a function up to the 10th order in the main scanning direction, and a spherical shape that continuously changes in the image height direction in the sub-scanning direction.
- the unit of the values in the table is [mm].
- the specific shape of the second lens 7 was a shape expressed by the above formula (iii) and Table 6 below. That is, the shape of the second lens 7 is an aspherical shape that can be expressed by a function up to 12th order in the main scanning direction, and a shape that continuously changes in the image height direction in the sub-scanning direction.
- R 0 is the radius of curvature of the cross section in the sub-scanning direction on the optical axis
- Y is the main scan.
- the value of r ′ is calculated on the opposite side (see FIG. 1) of the light source device 1 with respect to the reference axis X (optical axis) in a plane parallel to the main scanning direction y.
- a left-right asymmetric surface shape is represented.
- r ′ R 0 (1 + C 2 Y 2 + C 4 Y 4 + C 6 Y 6 + C 8 Y 8 + C 10 Y 10
- R ′′ R 0 (1 + D 2 Y 2 + D 4 Y 4 + D 6 Y 6 + D 8 Y 8 + D 10 Y 10 ) on the opposite light source side (see FIG. 5).
- the two lenses 7 have a plane shape that is asymmetric with respect to the reference axis X.
- Example (4) As the scanning optical system of Example (4), those shown in FIGS. 4 and 5 and the following Table 7 were produced.
- T2 ′ is the tilt amount of the second lens around the Y axis (see FIG. 5)
- S2 ′ is the shift amount of the second lens in the z-axis direction (see FIG. 5).
- the deflection optical system 5 has a pair of resonant mirrors 50A that sinely swing the reflecting surface.
- Aberration correction is performed by the scanning imaging optical system 8 so that the laser beam deflected at 50A is scanned at a constant speed on the scanning surface H.
- this scanning optical system makes a light beam incident on the deflecting optical system 5 from an oblique direction in a vertical plane in the sub-scanning direction z and from a substantially front surface in a vertical plane in the main scanning direction y, and the second lens. 7 is eccentric with respect to the reference axis X.
- the line imaging optical system 4 is not shown for simplification of illustration.
- the free-form surface lens (YZ polynomial surface) represented by the following formula
- C j is a coefficient of y m z n , and specifically has a value shown in Table 9 below.
- M and n are arbitrary natural numbers (where m + n ⁇ 10).
- Example (5) As the scanning optical system of Example (5), those shown in Table 10 below were produced.
- NA1 ⁇ t1 is 0.05 ⁇ NA1 ⁇ t1 ⁇ 1.5 It comes to satisfy.
- TOPAS5013LS-01 manufactured by Polyplastics Co., Ltd.
- the specific shapes of the first lens 6 and the second lens 7 were aspherical shapes expressed by the above formula (ii) and Table 11 below.
- the unit of the values in the table is [mm].
- NA1 ⁇ t1 is 0.05 ⁇ NA1 ⁇ t1 ⁇ 1.5 Is not satisfied.
- TOPAS5013LS-01 manufactured by Polyplastics Co., Ltd.
- the specific shapes of the first lens 6 and the second lens 7 are aspherical shapes expressed by the above formula (ii) and Table 13 below.
- the unit of the values in the table is [mm].
- a blue semiconductor CW laser having a wavelength of 405 nm was used in an environment at a temperature of 80 ° C., and irradiation was performed for 5000 hours at a laser output of 30 mW.
- Examples (1) to (5) the lens was not white turbid and transparent, and the transmittance in Examples (1) to (5) was almost the same as that before irradiation. .
- the lens has already become cloudy and appears cloudy, and the transmittance is about 30% lower than that before irradiation.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Lenses (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
波長500nm以下の光束を出射する光源と、
前記光源からの光束を偏向して主走査方向に走査する偏向光学系と、
前記偏向光学系により偏向された光束を被走査面上に結像させる走査結像光学系とを有する走査光学系において、
前記走査結像光学系は、
少なくとも、前記偏向光学系に隣接して設けられた、第1プラスチックレンズを有し、
前記偏向光学系に入射する光束の副走査方向での開口数をNA1とし、前記偏向光学系と前記第1プラスチックレンズとの間の距離をt1[mm]としたときに、
0.05≦NA1・t1≦1.5を満たし、
前記第1プラスチックレンズは、
α-オレフィンと環状オレフィンの共重合体からなる樹脂を基材とするプラスチックレンズであり、
前記環状オレフィンが下記一般式(I)または(II)で表されることを特徴とする。
請求の範囲第2項記載の発明は、請求の範囲第1項に記載の走査光学系において、
前記走査結合光学系は、前記第1プラスチックレンズよりも被走査面側に第2プラスチックレンズを有し、
前記第2プラスチックレンズは、
前記樹脂を基材とするプラスチックレンズであり、
前記第1プラスチックレンズの主走査方向の焦点距離をf1[mm]とし、前記第1プラスチックレンズと前記第2プラスチックレンズとの間隔をt2[mm]としたときに、
0.05≦t2/f1≦0.4、
かつ、
f1≧0
を満たすことを特徴とする。
前記第1プラスチックレンズ及び第2プラスチックレンズの少なくとも一方は、前記主走査方向と平行な断面形状が左右非対称であることを特徴とする。
前記樹脂は、耐光安定剤を含有することを特徴とする。
0.1≦NA1・t1≦1
を満たすことを特徴とする。
0.1≦t2/f1≦0.25
を満たすことを特徴とする。
前記走査結像光学系の全系の主走査焦点距離をf[mm]とし、前記偏向光学系から前記走査結像光学系の最も被走査面側の光学面までの距離をΣd[mm]としたとき、
0.25≦Σd/f≦0.5
を満たすことを特徴とする。
前記光源が、2本以上の光束を放出する光源であることを特徴とする。
前記第1プラスチックレンズ及び第2プラスチックレンズの少なくとも一方は、前記主走査方向と平行な断面形状が左右非対称であることを特徴とする。
少なくとも一方の光学面に回折構造が設けられた光学素子を有することを特徴とする。
前記偏向光学系は、反射面を正弦揺動させることによって前記光源からの光束を偏向する共振鏡で構成されていることを特徴とする。
請求の範囲第1項~第11項の何れか一項に記載の走査光学系を有することを特徴とする。
請求の範囲第12項に記載の光走査装置を有することを特徴とする。
0.05≦NA1・t1≦1.5
を満たす光学系とすることで、白濁による透過率低下が発生せず、優れた耐久性を示す走査光学系が得られることを見出した。なお、偏向光学系と第1プラスチックレンズとの間の距離t1は、偏向光学系による反射光のうち被走査面に垂直に当たる主光線、すなわち光軸上における、偏向光学系と第1プラスチックレンズの偏向光学系側の光学面との最短距離を意味する。
0.05≦t2/f1≦0.4、
かつ、
f1≧0
を満たすことが更に好ましい構成である。なお、第1プラスチックレンズと第2プラスチックレンズとの間隔t2は、光軸上における第1プラスチックレンズの被走査面側の光学面と、第2プラスチックレンズの偏向光学系側の光学面との最短距離を意味する。
5 偏向光学系
6 第1レンズ(第1プラスチックレンズ)
7 第2レンズ(第2プラスチックレンズ)
8 走査結像光学系
50 ポリゴンミラー
50A 共振鏡
100 光走査装置
101 走査光学系(光走査装置)
200 レーザープリンター(画像形成装置)
H 被走査面
K:円錐係数
Aj:非球面係数
αj:非球面次数
図4は、第2レンズ7の、副走査方向であるY軸に直交する断面の形状を示す模式図である。図4(a)は図3(b)に示すC-C線(X軸上)で切断した断面を示し、図4(b)は図3(b)に示すD-D線で切断した断面を示している。
ここで、R0は基準軸Xを含むZX平面での曲率半径であり、当該基準軸Xから離れるに従ってZX平面内での曲率半径Rsが変化する。
0.05≦NA1・t1≦1.5
を満たしていることが好ましく、
0.1≦NA1・t1≦1
を満たしていることが更に好ましい。
0.05≦NA1・t1≦1.5
を満たしており、かつ、第1レンズ6に後述のプラスチック材料を用いるため、第1レンズ6の白濁化を防止することができる。
NA1・t1<0.05
であると、ポリゴンミラー50と走査結像光学系8の第1レンズ6との間隔が狭くなる結果、単位面積当たりの強度の強い光が第1レンズ6を透過することになり、当該第1レンズ6に白濁化が起こりやすくなってしまう。一方、
1.5<NA1・t1
であると、第1レンズ6等に白濁化は起きにくいものの、光走査装置(光走査光学系)101の全体が大きくなってしまう。
0.05≦t2/f1≦0.4、
かつ
f1≧0
を満たしており、
0.1≦t2/f1≦0.25
であればより好ましい。
0.05≦t2/f1≦0.4、
かつ
f1≧0
を満たしているため、第2レンズ7の白濁化を防止することができる。
0.4<t2/f1
であると、第1レンズ6,第2レンズ7の間隔が大きくなり、第1レンズ6で絞られて単位面積当たりのビーム強度の強い光が第2レンズ7を透過することになり、白濁化が起こりやすくなる。一方、
t2/f1<0.05
であると、等速走査性と良好な像面湾曲特性との両立といったような、基本的な光学的性能を出すことが難しくなるとともに、結像光学系全体のレンズが大きくなる。
0.25≦Σd/f≦0.5
を満たしている。これにより、走査結像光学系8の全体をコンパクトにするとともに、製造コストを抑えることができる。また、第1レンズ6,第2レンズ7の中心部と周辺部との偏肉比を抑えることができるため、偏肉比が大きい場合と異なり、結像位置ごとに光量差が生じて画像にムラが生じるのを防止することができる。
0.5<Σd/f
であると、走査結像光学系8全体のレンズが大きくなってしまう。また、第1レンズ6,第2レンズ7の偏肉比が大きくなり、レンズ中心部を通る光とレンズ周辺部を通る光とでレンズ通過距離が異なる結果、被走査面Hへの到達光に光量ムラが生じてしまう。特に、このような問題は、光束としてブルー系の波長光を用い、第1レンズ6,第2レンズ7として樹脂製レンズを用いた場合には、レンズの内部吸収率が高いために顕著となる。また、
Σd/f<0.25
であると、等速走査性と良好な像面湾曲特性との両立といったような、基本的な光学的性能を出すことが難しくなる。
(樹脂組成物の調製方法)
本実施形態における樹脂組成物の調製方法について説明する。
本発明に用いられる酸化防止剤について説明する。
《耐光安定剤》
本発明に好ましく用いられる耐光安定剤について説明する。
紫外線吸収剤の中でも、2-(2′-ヒドロキシ-5′-メチルフェニル)ベンゾトリアゾール、2-(2H-ベンゾトリアゾール-2-イル)-4-メチル-6-(3,4,5,6-テトラヒドロフタルイミディルメチル)フェノール、2-(2H-ベンゾトリアゾール-2-イル)-4,6-ビス(1-メチル-1-フェニルエチル)フェノール等が耐熱性、低揮発性等の観点から好ましい。
(1)軟質重合体
本発明に用いる軟質重合体は、通常30℃以下のTgを有する重合体であり、Tgが複数存在する場合には、少なくとも最も低いTgが30℃以下であることが好ましい。軟質重合体は、架橋構造を有したものであってもよく、また、変性反応により官能基を導入したものでもよい。
(2)アルコール性化合物
また、アルコール性化合物は、分子内に少なくとも1つの非フェノール性水酸基を有する化合物で、好適には、少なくても1つの水酸基と少なくとも1つのエーテル結合またはエステル結合を有する。このような化合物の具体例としては、例えば2価以上の多価アルコール、より好ましくは3価以上の多価アルコール、さらに好ましくは3~8個の水酸基を有する多価アルコールの水酸基の1つがエーテル化またはエステル化されたアルコール性エーテル化合物やアルコール性エステル化合物が挙げられる。
(3)有機または無機フィラー
有機フィラーとしては、通常の有機重合体粒子または架橋有機重合体粒子を用いることができ、例えば、ポリエチレン、ポリプロピレンなどのポリオレフィン;ポリ塩化ビニル、ポリ塩化ビニリデンなどのハロゲン含有ビニル重合体;ポリアリレート、ポリメタクリレートなどのα,β‐不飽和酸から誘導された重合体;ポリビニルアルコール、ポリ酢酸ビニルなどの不飽和アルコールから誘導された重合体;ポリエチレンオキシド、またはビスグリシジルエーテルからから誘導された重合体;ポリフェニレンオキシド、ポリカーボネート、ポリスルフォンなどの芳香族縮合系重合体;ポリウレタン;ポリアミド;ポリエステル;アルデヒド・フェノール系樹脂;天然高分子化合物などの粒子または架橋粒子を挙げることができる。
0.05≦NA1・t1≦1.5、
好ましくは
0.1≦NA1・t1≦1
を満たしており、かつ、第1レンズ6に上述のプラスチック材料を用いるため、第1レンズ6の白濁化を防止することができる。
0.05≦t2/f1≦0.4、
かつ
f1≧0
を満たすとともに、第2レンズ7に上述のプラスチック材料を用いており、好ましくは、
0.1≦t2/f1≦0.25
を満たしているため、第2レンズ7の白濁化を防止することができる。
0.25≦Σd/f≦0.5
を満たしているので、走査結像光学系8の全体をコンパクトにするとともに、製造コストを抑えることができる。また、第1レンズ6、第2レンズ7の中心部と周辺部との偏肉比を抑えることができるため、偏肉比が大きい場合と異なり、結像位置ごとに光量差が生じて画像にムラが生じるのを防止することができる。
続いて、本実施の形態に好適な実施例について説明する。なお、説明に使用する記号の意味は以下の通りである。
n1:第1レンズ屈折率
n2:第2レンズ屈折率
t1:ポリゴンミラーから第1レンズまでの間隔[mm]
d1:第1レンズ中心厚[mm](図1参照)
t2:第1レンズと第2レンズの間隔[mm]
d2:第2レンズ中心厚[mm](図1参照)
d3:第2レンズ最終面から像面までの距離[mm]
T2:第2レンズのz軸回りのティルト量[度](図3(b)参照)
S2:第2レンズのy軸方向のシフト量[mm](図3(b)参照)
f:主走査方向の走査結像光学系の焦点距離[mm]
f1:主走査方向の第1レンズの焦点距離[mm]
NA1:副走査方向におけるポリゴン入射角の正弦値
Σd:偏向光学系からレンズ最終面までの間隔[mm](図2参照)
R:曲率半径
R0:主走査方向に対して垂直な面(副走査方向断面)におけるアナモフィックレンズ面の光軸部での曲率半径
また、以下の表において、10のべき乗数(例えば、2.5×10-02)は、E(例えば2.5E-02)を用いて表している。
[実施例(1)]
実施例(1)の走査光学系として、以下の表1に示すものを作製した。
実施例(2)の走査光学系として、以下の表3に示すものを作製した。
実施例(3)の走査光学系として、以下の表5に示すものを作製した。
r´=R0(1+C2Y2+C4Y4+C6Y6+C8Y8+C10Y10)
となっており、反光源側では
r”=R0(1+D2Y2+D4Y4+D6Y6+D8Y8+D10Y10)となっている(図5参照)。これにより、第2レンズ7は基準軸Xに対して左右非対称な面形状となっている。
実施例(4)の走査光学系として、図4,図5及び以下の表7に示すものを作製した。なお、表中「T2′」は第2レンズのY軸回りのティルト量(図5参照)であり、「S2′」は第2レンズのz軸方向のシフト量(図5参照)である。
実施例(5)の走査光学系として、以下の表10に示すものを作製した。
0.05≦NA1・t1≦1.5
を満たすようになっている。
比較例(1)の走査光学系として、以下の表12に示すものを作製した。
0.05≦NA1・t1≦1.5
を満たさないようになっている。
以上の実施例(1)~(5)及び比較例(1)の第1レンズ6,第2レンズ7について、白濁化の実験を行なった。
Claims (13)
- 波長500nm以下の光束を出射する光源と、
前記光源からの光束を偏向して主走査方向に走査する偏向光学系と、
前記偏向光学系により偏向された光束を被走査面上に結像させる走査結像光学系とを有する走査光学系において、
前記走査結像光学系は、
少なくとも、前記偏向光学系に隣接して設けられた第1プラスチックレンズを有し、
前記偏向光学系に入射する光束の副走査方向での開口数をNA1とし、前記偏向光学系と前記第1プラスチックレンズとの間の距離をt1[mm]としたときに、0.05≦NA1・t1≦1.5を満たし、
前記第1プラスチックレンズは、
α-オレフィンと環状オレフィンの共重合体からなる樹脂を基材とするプラスチックレンズであり、
前記環状オレフィンが下記一般式(I)または(II)で表されることを特徴とする走査光学系。
(式(I)中、nは0または1であり、mは0または正の整数であり、kは0または1であり、R1~R18ならびにRaおよびRb は、それぞれ独立に、水素原子、ハロゲン原子または炭化水素基を表す。)
(式(II)中、pおよびqはそれぞれ独立に、0または正の整数であり、rおよびsはそれぞれ独立に、0、1または2を表し、R21~R39はそれぞれ独立に、水素原子、ハロゲン原子、炭化水素基またはアルコキシ基を表す。) - 前記走査結像光学系は、前記第1プラスチックレンズよりも被走査面側に第2プラスチックレンズを有し、
前記第2プラスチックレンズは、
前記樹脂を基材とするプラスチックレンズであり、
前記第1プラスチックレンズの主走査方向の焦点距離をf1[mm]とし、前記第1プラスチックレンズと前記第2プラスチックレンズとの間隔をt2[mm]としたときに、
0.05≦t2/f1≦0.4、かつ、
f1≧0
を満たすことを特徴とする請求の範囲第1項に記載の走査光学系。 - 前記第1プラスチックレンズ及び第2プラスチックレンズの少なくとも一方は、前記主走査方向と平行な断面形状が左右非対称であることを特徴とする請求の範囲第2項に記載の走査光学系。
- 前記樹脂は、耐光安定剤を含有することを特徴とする請求の範囲第1項~第3項の何れか一項に記載の走査光学系。
- 0.1≦NA1・t1≦1を満たすことを特徴とする請求の範囲第1項~第4項の何れか一項に記載の走査光学系。
- 0.1≦t2/f1≦0.25を満たすことを特徴とする請求の範囲第2項に記載の走査光学系。
- 前記走査結像光学系の全系の主走査方向の焦点距離をf[mm]とし、前記偏向光学系から前記走査結像光学系の最も被走査面側の光学面までの距離をΣd[mm]としたとき、
0.25≦Σd/f≦0.5
を満たすことを特徴とする請求の範囲第1項~第6項の何れか一項に記載の走査光学系。 - 前記光源が、2本以上の光束を放出する光源であることを特徴とする請求の範囲第1項~第7項の何れか一項に記載の走査光学系。
- 前記第1プラスチックレンズは、前記主走査方向と平行な断面形状が左右非対称であることを特徴とする請求の範囲第1項~第8項の何れか一項に記載の走査光学系。
- 少なくとも一方の光学面に回折構造が設けられた光学素子を有することを特徴とする請求の範囲第1項~第9項の何れか一項に記載の走査光学系。
- 前記偏向光学系は、反射面を正弦揺動させることによって前記光源からの光束を偏向する共振鏡で構成されていることを特徴とする請求の範囲第1項~第10項の何れか一項に記載の走査光学系。
- 請求の範囲第1項~第11項の何れか一項に記載の走査光学系を有することを特徴とする光走査装置。
- 請求の範囲第12項に記載の光走査装置を有することを特徴とする画像形成装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/864,858 US8223419B2 (en) | 2008-01-31 | 2009-01-21 | Scanning optical system, optical scanning device, and image forming device |
JP2009551474A JP5246170B2 (ja) | 2008-01-31 | 2009-01-21 | 走査光学系、光走査装置及び画像形成装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-021313 | 2008-01-31 | ||
JP2008021313 | 2008-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009096278A1 true WO2009096278A1 (ja) | 2009-08-06 |
Family
ID=40912630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/050825 WO2009096278A1 (ja) | 2008-01-31 | 2009-01-21 | 走査光学系、光走査装置及び画像形成装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8223419B2 (ja) |
JP (1) | JP5246170B2 (ja) |
WO (1) | WO2009096278A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9864934B2 (en) * | 2014-12-10 | 2018-01-09 | Canon Kabushiki Kaisha | Optical scanning device, image forming apparatus, and correction method |
US11550038B2 (en) * | 2018-09-26 | 2023-01-10 | Apple Inc. | LIDAR system with anamorphic objective lens |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001249293A (ja) * | 2000-03-06 | 2001-09-14 | Ricoh Co Ltd | 光走査装置・走査光学系・光走査方法・画像形成装置 |
JP2002365575A (ja) * | 2001-06-12 | 2002-12-18 | Canon Inc | 光走査装置及びそれを用いた画像形成装置 |
JP2006070069A (ja) * | 2004-08-31 | 2006-03-16 | Konica Minolta Opto Inc | 熱可塑性樹脂材料及びそれを用いた光学素子 |
JP2006070068A (ja) * | 2004-08-31 | 2006-03-16 | Konica Minolta Opto Inc | 熱可塑性樹脂材料及びそれを用いた光学素子 |
JP2006171419A (ja) * | 2004-12-16 | 2006-06-29 | Canon Inc | 光走査装置及びそれを用いた画像形成装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005218649A (ja) | 2004-02-05 | 2005-08-18 | Terumo Corp | 医療用コネクター及び医療器 |
JP4677277B2 (ja) | 2005-05-09 | 2011-04-27 | キヤノン株式会社 | 光走査装置及びそれを用いた画像形成装置 |
JP2010020877A (ja) * | 2008-06-13 | 2010-01-28 | Konica Minolta Opto Inc | 光ピックアップ装置用の対物レンズ、光ピックアップ装置用の対物レンズの製造方法及び光ピックアップ装置 |
-
2009
- 2009-01-21 WO PCT/JP2009/050825 patent/WO2009096278A1/ja active Application Filing
- 2009-01-21 US US12/864,858 patent/US8223419B2/en not_active Expired - Fee Related
- 2009-01-21 JP JP2009551474A patent/JP5246170B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001249293A (ja) * | 2000-03-06 | 2001-09-14 | Ricoh Co Ltd | 光走査装置・走査光学系・光走査方法・画像形成装置 |
JP2002365575A (ja) * | 2001-06-12 | 2002-12-18 | Canon Inc | 光走査装置及びそれを用いた画像形成装置 |
JP2006070069A (ja) * | 2004-08-31 | 2006-03-16 | Konica Minolta Opto Inc | 熱可塑性樹脂材料及びそれを用いた光学素子 |
JP2006070068A (ja) * | 2004-08-31 | 2006-03-16 | Konica Minolta Opto Inc | 熱可塑性樹脂材料及びそれを用いた光学素子 |
JP2006171419A (ja) * | 2004-12-16 | 2006-06-29 | Canon Inc | 光走査装置及びそれを用いた画像形成装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2009096278A1 (ja) | 2011-05-26 |
US20100309537A1 (en) | 2010-12-09 |
US8223419B2 (en) | 2012-07-17 |
JP5246170B2 (ja) | 2013-07-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3966303B2 (ja) | 回折光学素子及びそれを用いた光ピックアップ装置 | |
KR101233429B1 (ko) | 수지 조성물 및 이 조성물로부터 얻어진 성형체 | |
US7554736B2 (en) | Objective lens and optical pickup apparatus | |
US20050225879A1 (en) | Objective lens and optical pickup apparatus | |
JP2009265614A (ja) | 光走査装置及び画像形成装置 | |
JP2005317186A (ja) | 対物レンズ及び光ピックアップ装置 | |
JP5246170B2 (ja) | 走査光学系、光走査装置及び画像形成装置 | |
CN1330296A (zh) | 模制品 | |
JP2007041292A (ja) | 光学素子 | |
KR100805960B1 (ko) | 회절 광학 소자 및 그것을 이용한 광픽업 장치 | |
JP5353243B2 (ja) | プラスチック光学素子、それを用いた光ピックアップ用レンズ及び光ピックアップ装置 | |
JP2007119567A (ja) | プラスチック製光学素子の製造方法 | |
JP5246166B2 (ja) | 走査光学系、光走査装置及び画像形成装置 | |
JP2008070599A (ja) | 光走査装置および画像形成装置 | |
US20090189127A1 (en) | Optical resin lens and production method for optical resin material | |
WO2010016377A1 (ja) | 光学素子及び光ピックアップ装置 | |
JP2005310266A (ja) | 対物レンズ及び光ピックアップ装置 | |
US20090312510A1 (en) | Optical element and optical pickup apparatus | |
JP2005234175A (ja) | 光学用樹脂レンズ及び光学用樹脂レンズの製造方法 | |
JP2000047132A (ja) | 走査光学系 | |
JP2007119668A (ja) | プラスチック製光学素子の収納容器、プラスチック製光学素子の運搬方法及びプラスチック製光学素子の保管方法 | |
JP2010027160A (ja) | 光ピックアップ装置 | |
JP2009031673A (ja) | 光走査装置 | |
JP2007122799A (ja) | 光ディスクドライブ装置、光ピックアップ装置の処理方法、光ディスクドライブ装置の製造方法及び光ディスクドライブ装置の処理方法 | |
JP2001142020A (ja) | タンデム方式の走査光学装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09704955 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2009551474 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12864858 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09704955 Country of ref document: EP Kind code of ref document: A1 |