CN101568963B - Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device - Google Patents
Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device Download PDFInfo
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- CN101568963B CN101568963B CN2008800012548A CN200880001254A CN101568963B CN 101568963 B CN101568963 B CN 101568963B CN 2008800012548 A CN2008800012548 A CN 2008800012548A CN 200880001254 A CN200880001254 A CN 200880001254A CN 101568963 B CN101568963 B CN 101568963B
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Abstract
The invention provides a synthetic resin lens manufacturing method, a reformed quality synthetic resin material manufacturing method and an optical pickup device. A synthetic resin material, which is small in decreasing degree of the transmissivity of red laser light due to accumulated irradiation of the red laser light but is large in decreasing degree of the transmissivity of blue-violet laser light due to accumulated irradiation of the blue-violet laser light, has been widely used as an objective lens material in compliance with the requirement for the red laser light. The synthetic resin material, however, has not been able to be put into practical use for an objective lens material in compliance with the requirement for the blue-violet laser light. It is an object to make the synthetic resin material usable as such an objective lens material for the blue-violet laser light. An electromagnetic wave with a shorter wavelength than that of a blue-violet laser light is irradiated to a lens member made of a synthetic resin material so that the degree of the transmissivity change of the blue-violet laser light is adjusted in the lens member due to accumulated irradiation of the blue-violet laser light.
Description
Technical field
The present invention relates to be recorded in reading action, CD being carried out the synthetic resin lens and the starting material thereof of employed object lens of optical take-up apparatus etc. of the operation of recording of signal of signal on the CD.
Background technology
The optical disc apparatus that the laser that can irradiate from optical take-up apparatus through the signal recording layer irradiation to CD carries out the operation of recording that reads action, signal of signal obtains promoting.
As optical take-up apparatus; Usually promote the use of the method for the CD that is known as CD, DVD; But, develop recently and a kind ofly use the CD that improved recording density, be the method for the CD of Blu-ray specification or HD DVD (High Density Digital VersatileDisk) specification.
As the laser that reads action that is recorded in the signal on the CD specification CD, use the infrared ray of wavelength as 780nm, as the laser that reads action that is recorded in the signal on the DVD specification CD, use the infrared ray of wavelength as 650nm.
And the thickness that is arranged on the protective seam on the upper surface of signal recording layer of above-mentioned CD specification CD is 1.2mm, and the numerical aperture of the object lens that use in order to carry out the reading action of signal from this signal recording layer is defined as 0.45.In addition, the thickness that is arranged on the protective seam on the upper surface of signal recording layer of above-mentioned DVD specification CD is 0.6mm, and the numerical aperture of the object lens that use in order to carry out the reading action of signal from this signal recording layer is defined as 0.6.
With respect to the CD of this CD specification and DVD specification, as the laser that reads action that is recorded in the signal on Blu-ray specification, the HD DVD specification CD, use the short laser of wavelength, for example wavelength is the blue-violet light of 405nm.
The thickness that is arranged on the protective seam on the upper surface of signal recording layer of Blu-ray specification CD is 0.1mm, and the numerical aperture of the object lens that use in order to carry out the reading action of signal from this signal recording layer is defined as 0.85.
For the reproducing movement that is recorded in the signal in the signal recording layer that is arranged on the Blu-ray specification CD or with signal record in this signal recording layer, need reduce through making the diameter of the laser point that laser convergence generates.The object lens that use for the laser point shape that obtains to expect not only numerical aperture (NA) increase, and focal length shortens, so the radius-of-curvature of object lens diminishes.
In optical take-up apparatus, be assembled with radiation and the laser of the corresponding wavelength of above-mentioned each specification laser diode, make the object lens of laser convergence on the signal recording layer that is arranged on each CD that radiate by this laser diode.As the material of these object lens, use glass usually, but, use synthetic resin (with reference to patent documentation 1) recently mostly in order to make at an easy rate.
Patent documentation 1: TOHKEMY 2005-338684 communique
Though through making the price that object lens can reduce optical take-up apparatus by synthetic resin, the characteristic that synthetic resin exists its characteristic to change according to the Wavelength of Laser of using.Use following synthetic resin material to make to be used to make with Blu-ray specification, the corresponding laser of HD DVD specification, be under the situation of the object lens assembled as the bluish violet color laser of 405nm of wavelength, have the such characteristic of transmissivity that reduces object lens because of bluish violet color laser.Above-mentioned synthetic resin be used to make with the corresponding laser of DVD specification, be that wavelength is the employed synthetic resin material of object lens, the synthetic resin that is known as APEL (ア ペ Le) 5014DP of for example Mitsui Chemicals corporate system (Mitsui Chemicals society) of convergence of the red laser of 650nm.
Fig. 4 be expression directly use by the object lens illumination wavelength of the synthetic resin made of the above-mentioned AP of being known as EL5014DP as under the situation of the bluish violet color laser of 405nm, transmissivity is with respect to the performance plot of the variation of service time; Can confirm through experiment; The ageing variation that the transmitance of object lens produces along with the passing of irradiation time has surpassed in the specialized range that sets when satisfying the spendable specification of object lens of the optical property of optical take-up apparatus, bluish violet color laser that promptly to have shone 1000 hours wavelength be 405nm; This specialized range is 2%; If break away from this specialized range of the specification that can use based on object lens, then transmitance reduces.
When the transmissivity of object lens reduced in this wise, the intensity that is focused at the laser on the card of CD diminished, and can't normally be recorded in the reproducing movement of the signal on the CD, the operation of recording of signal.In order to address this problem; Material as object lens; Use the synthetic resin material of the influence can not receive bluish violet color laser, the synthetic resin material that is known as Geonex (ゼ オ ネ Star Network ス) 340R of Japanese Geon (Japanese ゼ オ Application) corporate system for example; But this synthetic resin material is compared with the employed material of object lens that DVD uses and is cost an arm and a leg, and existence can't reduce the such problem of price of optical take-up apparatus.
Summary of the invention
The present invention provides a kind of manufacturing approach of the synthetic resin lens that is used to address this problem.
The manufacturing approach of synthetic resin lens of the present invention is characterised in that; Through the electromagnetic wave (for example purple light, ultraviolet ray, X ray, gamma-rays) shorter than the wavelength of bluish violet color laser to the lens component illumination wavelength that constitutes by synthetic resin; Adjust the intensity of variation that the transmissivity of the bluish violet color laser of said lens member changes along with the cumulative exposure of bluish violet color laser (for example, with the above-mentioned electromagnetic wave of irradiation before compare reduce above-mentioned intensity of variation).
In addition; The manufacturing approach of reformed quality synthetic resin material of the present invention is characterised in that; Through the electromagnetic wave (for example purple light, ultraviolet ray, X ray, gamma-rays) shorter than the wavelength of bluish violet color laser to synthetic resin material illumination wavelength; Adjust the intensity of variation that the transmissivity of the bluish violet color laser of above-mentioned synthetic resin material changes along with the cumulative exposure of bluish violet color laser (for example, with the above-mentioned electromagnetic wave of irradiation before compare reduce above-mentioned intensity of variation).
Adopt the present invention; Also can be with being widely used as tackling the objective material of red laser greatly owing to the reduction degree that the transmissivity of red laser is less along with the reduction degree that the cumulative exposure of red laser reduces, the transmissivity of bluish violet color laser reduces along with the cumulative exposure of bluish violet color laser but in practicality, can't be provided as the reply bluish violet color laser objective material the synthetic resin material (for example; The less expensive synthetic resin material that above-mentioned APEL5014DP is such) as the objective material of reply bluish violet color laser (for example, the equivalent material of the expensive synthetic resin material of the such comparison of above-mentioned Geonex340R).
In addition; Along with embodiment of the present invention; The transmissivity of just having shone above-mentioned electromagnetic wave bluish violet color laser afterwards also can reduce before penetrating above-mentioned electromagnetic wave; But itself does not have too big problem in reality aspect the object lens of reply bluish violet color laser, and the intensity of variation that the transmissivity of bluish violet color laser changes along with the cumulative exposure of bluish violet color laser diminishes, and aspect the object lens of reply bluish violet color laser, becomes very big advantage in reality.
Description of drawings
Fig. 1 is that expression is with the summary construction diagram of synthetic resin lens of the present invention as the optical take-up apparatus of object lens.
Fig. 2 is the transmissivity of expression synthetic resin lens of the present invention and the performance plot of time relation.
Fig. 3 is the performance plot that is used to explain the manufacturing approach of synthetic resin lens of the present invention.
Fig. 4 is a performance plot of representing the transmissivity and the time relation of synthetic resin lens in the past.
Description of reference numerals
1, laser diode; 2, diffraction grating; 3, polarization beam apparatus; 6, collimation lens; 8, sensor leads; 10, object lens.
Embodiment
Fig. 1 is that expression is with the summary construction diagram of synthetic resin lens of the present invention as the optical take-up apparatus of object lens; Fig. 2 is the performance plot of transmissison characteristic of expression synthetic resin lens of the present invention, and Fig. 3 is the performance plot that is used to explain the manufacturing approach of synthetic resin lens of the present invention.
In Fig. 1; Reference numeral 1 is to be used to radiate the for example laser diode of the laser of 405nm blue-violet light; Reference numeral 2 is diffraction grating of the laser institute incident of being radiated by above-mentioned laser diode 1; This diffraction grating 2 is made up of 2a of diffraction grating portion and 1/2 wavelength plate 2b, and the 2a of this diffraction grating portion becomes separation by laser as the main beam of 0 light with as the side beam of+1 diffraction light and-1 diffraction light, and this 1/2 wavelength plate 2b is the rectilinearly polarized light of S direction with the laser beam transformation of incident.
Reference numeral 3 is polarization beam apparatus that the laser institute incident of above-mentioned diffraction grating 2 is crossed in transmission, and this polarization beam apparatus 3 is provided with controlling diaphragm 3a, this controlling diaphragm 3a reflection by the S polarization laser, and the laser that has made towards P direction polarization sees through.Reference numeral 4 is that monitor is used photodetector; This monitor be arranged on photodetector 4 in the laser that radiates by above-mentioned laser diode 1, transmission crosses the position that laser shone of above-mentioned polarization beam apparatus 3, it detects the output that output is used to control the laser that is radiated by above-mentioned laser diode 1.
Reference numeral 5 is 1/4 wavelength plates, and this 1/4 wavelength plate 5 is arranged on by the position of the controlling diaphragm 3a laser light reflected incident of above-mentioned polarization beam apparatus 3, plays the effect that the laser of incident is transformed to circularly polarized light from rectilinearly polarized light.Reference numeral 6 is collimation lenses that the laser institute incident of above-mentioned 1/4 wavelength plate 5 is crossed in transmission, and it is the effect of the laser of incident being made directional light in order to play that this collimation lens 6 is set, and the spherical aberration that caused by the protective seam of the CD D of Blu-ray specification of revisal.
Reference numeral 7 is transformed to laser institute's incident of directional light and the catoptron that this laser-bounce is gone out by above-mentioned collimation lens 6; Of the back; Incide on this catoptron 7 from the back light of the signal recording layer L of CD D reflection; And catoptron 7 plays the effect of this back light towards the direction reflection of above-mentioned polarization beam apparatus 3.
Reference numeral 8 is sensor leads that the back light institute incident of controlling diaphragm 3a is crossed in transmission; This controlling diaphragm 3a is arranged on the above-mentioned polarization beam apparatus 3, is formed with cylindrical surface, plane, concave curved surface or convex surface etc. in the plane of incidence side and the exit facet side of this sensor leads 8.This sensor leads 8 is set is in order to generate focus control and to move employed focus error signal through in back light, producing astigmatism.Reference numeral 9 is photodetectors, and it is arranged on the back light that has passed through the sensor lens 8 and assembles the position shine, and this photodetector 94 is cut apart sensor formations such as (four-divided sensor) by what be arranged with photodiode.The structure of this photodetector 9 and generate the action etc. of focus error signal through method of astigmatism well-known omits its explanation.
Reference numeral 10 is by the institute's incident of above-mentioned catoptron 7 laser light reflected and make the object lens among the signal recording layer L of laser convergence on being arranged at above-mentioned CD D of incident; These object lens 10 are made through the shaping synthetic resin material; And its radius-of-curvature is designed to different with sphere, and radius-of-curvature is less.
Under the situation of the reproducing movement that is recorded in the signal on the CD D, laser diode 1 is supplied with drive current, this laser diode 1 radiation wavelength is the laser of 405nm certainly.The laser that radiates from above-mentioned laser diode 1 incides diffraction grating 2, the 2a of diffraction grating portion that is configured this diffraction grating 2 be separated into 0 light ,+1 diffraction light and-1 diffraction light, and be transformed to the rectilinearly polarized light of S direction by 1/2 wavelength plate 2b.The laser that above-mentioned diffraction grating 2 is crossed in transmission incides on the polarization beam apparatus 3, is set at the controlling diaphragm 3a reflection on this polarization beam apparatus 3, and a part of laser-transmitting and be radiated at monitor with on the photodetector 4.
Being incided on the collimation lens 6 through 1/4 wavelength plate 5 by above-mentioned controlling diaphragm 3a laser light reflected, is directional light at the effect down conversion of this collimation lens 6.The laser that is transformed to directional light by above-mentioned collimation lens 6 incides on the object lens 10 after mirror 7 reflections that are reflected.The laser that incides on the above-mentioned object lens 10 utilizes the convergence of these object lens 10 to move; As light spot on the signal recording layer L of CD D; Like this; On light spot the signal recording layer L at CD D of laser as expectation that laser diode 1 radiates, the numerical aperture of object lens 10 in this case is set at 0.85.
In addition; Owing to be in the in uneven thickness of protective seam between the signal plane of incidence of signal recording layer L and CD D; When above-mentioned object lens 10 carry out the convergence action of laser; Can produce spherical aberration, but through make the collimation lens 6 shown in the present embodiment towards optical axis direction, be arrow A or the displacement of B direction, just can this spherical aberration be adjusted to minimum.Usually all can carry out this adjustment action, omit its explanation.
Through above-mentioned action; Carry out to move through the convergence of object lens 10 from the laser that laser diode 1 radiates and be radiated at the action in the signal recording layer that is arranged on the CD D; But when carrying out this irradiation action, the back light that reflects of this signal recording layer L incides on the object lens 10 from CD D side certainly.The back light that incides on the above-mentioned object lens 10 incides on the polarization beam apparatus 3 through catoptron 7, collimation lens 6 and 1/4 wavelength plate 5.Incide the back light on the above-mentioned polarization beam apparatus 3, the controlling diaphragm 3a that is arranged on this polarization beam apparatus 3 is crossed in transmission owing to be transformed to the rectilinearly polarized light of P direction.
The back light that the laser of above-mentioned controlling diaphragm 3a is crossed in transmission incides on the sensor leads 8, makes it under the effect of this sensor leads 8, produce astigmatism.Utilize the sensor lens 8 to produce the back light of astigmatism, utilize the convergence action of this sensor leads 8 to shine to be arranged at 4 on the photodetector 9 to cut apart the sensor part of sensor etc.Like this, back light shines on the photodetector 9, and the result utilizes the variation of the light spot form shine the main beam that is assembled in the sensor part in this photodetector 9, as known carry out the generation action of focus error signal.Utilize this focus error signal to make the signal face direction displacement of object lens 10, thereby can carry out the focus control action along CD D.
In addition; Though it is undeclared in the present embodiment; But can carry out knownly having utilized the side beam that generates by diffraction grating 2, promptly+1 the tracking Control of time diffraction light and-1 diffraction light is moved, through carrying out the action of reading that this control action is recorded in signal on the CD D.
Be recorded in the action of reading of signal on the CD D as described above; But owing to read when action carrying out this; The part of laser shines monitor with on the photodetector 4; Therefore, can utilize from this monitor and control the driving current value that supplies to laser diode 1 with the monitor signal that photodetector 4 obtains.
Owing to can control the output of laser through the driving current value that control supplies to laser diode 1; Therefore; Not only can be recorded in the action of reading of signal on the CD D, also can carry out the adjustment action of desired laser output when this CD D goes up tracer signal.
As above explanation, carry out the signal reproduction action etc. of the optical take-up apparatus of structure shown in Figure 1, the manufacturing approach of the object lens 10 in the purport of the present invention then is described.
Object lens 10 of the present invention are through with the synthetic resin material, for example the such cycloolefin fluoropolymer resin of above-mentioned APEL5014DP is shaped and makes; This material is and is used to carry out the employed material identical materials of object lens of following convergence action, and above-mentioned convergence action is meant the convergence action with the laser of the 1st wavelength, red laser that the corresponding wavelength of for example DVD specification CD is 650nm.
Carry out the object lens WBR that uses this synthetic resin material forming from the ultraviolet action of the wavelength of ultraviolet radiation device, the radiation of for example mercury xenon lamp as 360nm.Ultraviolet ray for example is about 50 minutes to the irradiation time of these object lens, can confirm when carrying out this irradiation and move, object lens to bluish violet color laser, be that wavelength is that the initial transmission of the laser of 405nm is reduced to about 95.7%.
Fig. 2 representes that the wavelength that through said method, promptly shines from the radiation of mercury xenon lamp is the ultraviolet ray of 360nm; Set transmissivity to such an extent that be reduced to about 95.7%, again object lens are shone hepatic laser, are irradiation time and the relation of transmissivity of wavelength when being the laser of 405nm.Can know by this performance plot, through experimental verification through the moment after about 40 hours, transmissivity stabilizes to 95.3%, the variation range of the transmissivity in the time of can be with bluish violet color laser that to have shone 1000 hours wavelength be 405nm is suppressed at roughly in 1%.That is,, can dwindle the ratio of above-mentioned object lens significantly to the ageing variation of the transmitance of bluish violet color laser after the ultraviolet radiation device irradiation ultraviolet radiation.
As stated; Through from the object lens irradiation ultraviolet radiation of ultraviolet radiation device to forming with the cycloolefin fluoropolymer resin; Can the ageing variation of object lens transmissivity be set in the scope of the specification defined that satisfies optical property; Promptly when the bluish violet color laser that to have shone 1000 hours wavelength be 405nm, be set in 2%; Therefore; For by assembling the object lens irradiation ultraviolet radiation that the material identical materials that object lens adopted of action is shaped with being used to carry out the red laser corresponding with DVD specification CD, that wavelength is 650nm, can be without barrier as make the signal reproduction action, the signal record that are recorded on the Blu-ray specification CD D move employed bluish violet color laser, be that wavelength is the object lens of laser convergence on the signal recording layer L of CD D of 405nm.
Performance plot shown in Figure 3 representes that the object lens illumination wavelength to the ultraviolet irradiation asynchronism(-nization) of radiating from the mercury xenon lamp is irradiation time and the relation of transmissivity under the situation of bluish violet color laser of 405nm.In the figure; 100% transmissivity is meant that not the wavelength to by the object lens irradiation ultraviolet radiation of synthetic resin material forming the time is the transmissivity of the bluish violet color laser of 405nm, and this synthetic resin is and is used to carry out the employed material identical materials of object lens of convergence action that wavelength is the red laser of 650nm.
In Fig. 3, it is the variation of the transmissivity of the ultraviolet ray of the 360nm object lens after about 50 minutes that the characteristic shown in the solid line is represented to shine as described above from the wavelength that the mercury xenon lamp radiates.Can be known by this characteristic, the initial transmission of object lens reduced being set at the value about 95.7% through irradiation ultraviolet radiation, in the moment after the irradiation time of bluish violet color laser was through 40 hours, the transmissivity of object lens is reduced to 95.3% and keep stable.
In addition, in the figure, it is the variation of the transmissivity of the ultraviolet ray of the 360nm object lens after about 7 minutes that the characteristic shown in the dotted line is represented to shine from the wavelength that the mercury xenon lamp radiates.Can be known by this characteristic, the initial transmission of object lens reduced being set at the value about 95% through irradiation ultraviolet radiation, in the moment after the irradiation time of bluish violet color laser was through 15 hours, the transmissivity of object lens rises to 97%.That is,, therefore, can be described as in existing problems aspect the object lens use of optical take-up apparatus owing to the transmissivity of the object lens after irradiation ultraviolet radiation is about the 7 minutes irradiation time along with bluish violet color laser changes more than 2%.
As stated, object lens change according to the ultraviolet irradiation condition the transmissivity of bluish violet color laser, through the adjustment ultraviolet irradiation time, can the initial set value and the variation characteristic of transmissivity be set at various values.That is, in the above-described embodiments, be about 50 minutes with the ultraviolet irradiation time set, be that the initial transmission of the laser of 405nm is set at about 95.7% with object lens to wavelength.And; In the above-described embodiments; In the setting action of carrying out transmissivity through the ultraviolet ray that object lens irradiations is radiated from the mercury xenon lamp, but this mercury xenon lamp have in the ultraviolet region spectral intensity and width greatly, have a such characteristic of spectrum bright line crowd of broad.Therefore, in order to obtain the higher object lens of precision, need shine operation accurately.
As stated; Through shining by the ultraviolet ray that ultraviolet radiation device produces the stipulated time on the object lens that form by synthetic resin; Can the initial transmission of object lens be set at desired value, initial transmission can be set according to ultraviolet intensity and irradiation time.Promptly; Because irradiation time has bigger variation according to ultraviolet ray to the irradiation heat of object lens is different; Therefore, through suitably setting ultraviolet intensity and irradiation time, can be after the ultraviolet radiation device irradiation ultraviolet radiation; Dwindle the ratio of above-mentioned object lens significantly, can the transmissivity of object lens be set in the scope of object penetrating rate the ageing variation of the transmissivity of bluish violet color laser.
In addition; Though the ultraviolet ray that is produced by ultraviolet radiation device through irradiation makes the object lens that formed by synthetic resin change to the transmissison characteristic of bluish violet color laser; But because the object lens of optical take-up apparatus adopt the ultraviolet hardening bonding agent mode on the member that is known as lens retainer (not shown) that is adhesively fixed of utilizing mostly; Therefore; Shine on the object lens the such advantage of change operation of just can be adhesively fixed simultaneously operation and transmissivity as long as have the ultraviolet ray that when this is adhesively fixed action, to shine.
At this; The said lens retainer is can flexibly supporting above that with respect to the mode of the driver frame displacement on the casing that is fixed on optical take-up apparatus; Thereby, can shine the focus control action and the tracking Control action of the laser on CD through the displacement of object lens.
In addition; Will be as the synthetic resin material of the APEL5014DP of the material of the object lens 10 of present embodiment and suitable bluish violet color laser, be that the refractive index of Geonex340R is when comparing; The refractive index of APEL5014DP during with respect to 25 ℃ of d line (as the bright line of Na lamp source, be that wavelength is the laser of 587.6nm) is 1.5434; The refractive index of Geonex340R is 1.509, with respect to bluish violet, be that wavelength is that the refractive index of the laser of 405nm is respectively 1.5575,1.5215.
Can know like this, compare with the employed synthetic resin material of object lens that bluish violet color laser is used, as the DVD that uses red laser with the APEL5014DP of the synthetic resin material of object lens, promptly to be used as the refractive index of synthetic resin material of objective material of the present invention bigger.Thereby the object lens with the present invention makes because refractive index is bigger, therefore, can increase the radius-of-curvature of object lens, therefore, need to lack in manufacturings under the situation of object lens of optical take-up apparatus of object lens of focus, and the present invention plays very big effect.
In addition; To plastic object lens irradiation ultraviolet radiation transmissivity is changed in the present embodiment; But also can form collimation lens 6, the sensor leads 8 of the optical system that constitutes optical take-up apparatus shown in Figure 1 by synthetic resin, by the ultraviolet ray that ultraviolet radiation device produces transmissivity changed these collimation lenses 6, sensor leads 8 irradiations.In addition; In the present embodiment; In order to change synthetic resin lens to the transmissison characteristic of bluish violet color laser and adopt ultraviolet ray; But also can substitute ultraviolet ray, adopt the short electromagnetic wave of wavelength ratio bluish violet color laser wavelength of purple light, X ray, gamma-rays etc. according to the difficulty of adjustment irradiation time, exposure intensity.
Claims (16)
1. the manufacturing approach of a synthetic resin lens is characterized in that,
Through the lens component illumination wavelength electromagnetic wave shorter of reduction degree that the reduction degree that reduced along with the cumulative exposure of bluish violet color laser by synthetic resin material transmissivity that constitute, bluish violet color laser is reduced along with the cumulative exposure of red laser greater than the transmissivity of red laser, adjust the intensity of variation that the transmissivity of the bluish violet color laser of said lens member changes along with the cumulative exposure of bluish violet color laser than the wavelength of bluish violet color laser.
2. the manufacturing approach of a synthetic resin lens is characterized in that,
Through the lens component illumination wavelength electromagnetic wave shorter of reduction degree that the reduction degree that reduced along with the cumulative exposure of bluish violet color laser by synthetic resin material transmissivity that constitute, bluish violet color laser is reduced along with the cumulative exposure of red laser greater than the transmissivity of red laser than the wavelength of bluish violet color laser, the reduction degree that reduction degree that the transmissivity of the bluish violet color laser of said lens member reduces along with the cumulative exposure of bluish violet color laser is reduced along with the cumulative exposure of red laser near the transmissivity of red laser.
3. the manufacturing approach of a synthetic resin lens is characterized in that,
Through to by being the lens component illumination wavelength electromagnetic wave shorter that the synthetic resin more than 1.52 constitutes with respect to the refractive index of d line under 25 ℃ of environment, adjust the intensity of variation that the transmissivity of the bluish violet color laser of said lens member changes along with the cumulative exposure of bluish violet color laser than the wavelength of bluish violet color laser.
4. the manufacturing approach of a synthetic resin lens is characterized in that,
Through to by being the lens component illumination wavelength electromagnetic wave shorter that the synthetic resin more than 1.52 constitutes with respect to the refractive index of d line under 25 ℃ of environment, make reduction degree that the transmissivity of the bluish violet color laser of said lens member reduces along with the cumulative exposure of bluish violet color laser little according to penetrating before the above-mentioned electromagnetic wave than the wavelength of bluish violet color laser.
5. the manufacturing approach of synthetic resin lens according to claim 1 is characterized in that,
The said lens member utilizes the ultraviolet hardening bonding agent to be adhered on the lens retainer;
To above-mentioned ultraviolet hardening bonding agent irradiation ultraviolet radiation the time, also this ultraviolet ray is shone on the said lens member.
6. the manufacturing approach of synthetic resin lens according to claim 2 is characterized in that,
The said lens member utilizes the ultraviolet hardening bonding agent to be adhered on the lens retainer;
To above-mentioned ultraviolet hardening bonding agent irradiation ultraviolet radiation the time, also this ultraviolet ray is shone on the said lens member.
7. the manufacturing approach of synthetic resin lens according to claim 3 is characterized in that,
The said lens member utilizes the ultraviolet hardening bonding agent to be adhered on the lens retainer;
To above-mentioned ultraviolet hardening bonding agent irradiation ultraviolet radiation the time, also this ultraviolet ray is shone on the said lens member.
8. the manufacturing approach of synthetic resin lens according to claim 4 is characterized in that,
The said lens member utilizes the ultraviolet hardening bonding agent to be adhered on the lens retainer;
To above-mentioned ultraviolet hardening bonding agent irradiation ultraviolet radiation the time, also this ultraviolet ray is shone on the said lens member.
9. the manufacturing approach of a reformed quality synthetic resin material is characterized in that,
The lens component illumination wavelength electromagnetic wave shorter than the wavelength of bluish violet color laser of the reduction degree that reduces along with the cumulative exposure of red laser greater than the transmissivity of red laser through reduction degree that the transmissivity of bluish violet color laser is reduced along with the cumulative exposure of bluish violet color laser adjusted the intensity of variation that the transmissivity of the bluish violet color laser of above-mentioned synthetic resin material changes along with the cumulative exposure of bluish violet color laser.
10. the manufacturing approach of a reformed quality synthetic resin material is characterized in that,
The lens component illumination wavelength electromagnetic wave shorter of the reduction degree that reduces along with the cumulative exposure of red laser greater than the transmissivity of red laser through reduction degree that the transmissivity of bluish violet color laser is reduced along with the cumulative exposure of bluish violet color laser than the wavelength of bluish violet color laser, the reduction degree that intensity of variation that the transmissivity of the bluish violet color laser of above-mentioned synthetic resin material changes along with the cumulative exposure of bluish violet color laser is reduced along with the cumulative exposure of red laser near the transmissivity of red laser.
11. the manufacturing approach of a reformed quality synthetic resin material is characterized in that,
Through to being the synthetic resin material illumination wavelength electromagnetic wave shorter more than 1.52 with respect to the refractive index of d line under 25 ℃ of environment, adjust the intensity of variation that the transmissivity of the bluish violet color laser of above-mentioned synthetic resin material changes along with the cumulative exposure of bluish violet color laser than the wavelength of bluish violet color laser.
12. the manufacturing approach of a reformed quality synthetic resin material is characterized in that,
Through to being the synthetic resin material illumination wavelength electromagnetic wave shorter more than 1.52 with respect to the refractive index of d line under 25 ℃ of environment, make intensity of variation that the transmissivity of the bluish violet color laser of above-mentioned synthetic resin material changes along with the cumulative exposure of bluish violet color laser little according to penetrating before the above-mentioned electromagnetic wave than the wavelength of bluish violet color laser.
13. an optical take-up apparatus, wherein,
To use by the synthetic resin lens of the described manufacturing approach manufacturing of claim 1 and act on the object lens of assembling bluish violet color laser.
14. an optical take-up apparatus, wherein,
To use by the synthetic resin lens of the described manufacturing approach manufacturing of claim 2 and act on the object lens of assembling bluish violet color laser.
15. an optical take-up apparatus, wherein,
To use by the synthetic resin lens of the described manufacturing approach manufacturing of claim 3 and act on the object lens of assembling bluish violet color laser.
16. an optical take-up apparatus, wherein,
To use by the synthetic resin lens of the described manufacturing approach manufacturing of claim 4 and act on the object lens of assembling bluish violet color laser.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP189276/2007 | 2007-07-20 | ||
| JP2007189276 | 2007-07-20 | ||
| JP2008181569 | 2008-07-11 | ||
| JP181569/2008 | 2008-07-11 | ||
| PCT/JP2008/063033 WO2009014093A1 (en) | 2007-07-20 | 2008-07-18 | Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101568963A CN101568963A (en) | 2009-10-28 |
| CN101568963B true CN101568963B (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101307647A Expired - Fee Related CN101349801B (en) | 2007-07-20 | 2008-07-17 | Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device |
| CN2008800012548A Expired - Fee Related CN101568963B (en) | 2007-07-20 | 2008-07-18 | Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101307647A Expired - Fee Related CN101349801B (en) | 2007-07-20 | 2008-07-17 | Synthetic resin lens manufacturing method, reformed quality synthetic resin material manufacturing method and optical pickup device |
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| CN (2) | CN101349801B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104166219B (en) * | 2013-05-16 | 2017-05-31 | 惠州市大亚湾永昶电子工业有限公司 | Imaging lens device |
| CN104166224B (en) * | 2013-05-16 | 2017-07-25 | 惠州市大亚湾永昶电子工业有限公司 | Imaging lens device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115037A (en) * | 1993-11-17 | 1996-01-17 | 大宇电子株式会社 | Optical imaging lens system |
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- 2008-07-17 CN CN2008101307647A patent/CN101349801B/en not_active Expired - Fee Related
- 2008-07-18 CN CN2008800012548A patent/CN101568963B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115037A (en) * | 1993-11-17 | 1996-01-17 | 大宇电子株式会社 | Optical imaging lens system |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2006-233122A 2006.09.07 |
| JP特开2007-119567A 2007.05.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101349801A (en) | 2009-01-21 |
| CN101568963A (en) | 2009-10-28 |
| CN101349801B (en) | 2012-04-18 |
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