CN104129918A - Optical glass, preform, and optical element - Google Patents
Optical glass, preform, and optical element Download PDFInfo
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- CN104129918A CN104129918A CN201410183617.1A CN201410183617A CN104129918A CN 104129918 A CN104129918 A CN 104129918A CN 201410183617 A CN201410183617 A CN 201410183617A CN 104129918 A CN104129918 A CN 104129918A
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Abstract
The invention provides an optical glass, a preform and an optical element, from which the optical glass having a refraction index (nd) is within a desired range, a small Abbe number ([nu]d), small partial dispersion ratio ([theta]g, F) and high visible light transmittance can be obtained inexpensively. The optical glass comprises, by mass, 10.0%-40.0% of a SiO2 component and 5.0%-50.0% of an Nb2O5 component. The optical glass has an Abbe number ([nu]d) higher than 25 but lower than 35. Partial dispersion ratio ([theta]g,F) and the Abbe number ([nu]d) satisfy a relationship of (-0.00162*[nu]d+0.63622)<=([theta]g,F)<=(-0.00275*[nu]d+0.68125), in the range of [nu]d<=31, and satisfy a relationship of (-0.00162*[nu]d+0.63622)<=([theta]g,F)<=(-0.00162*[nu]d+0.64622), in the range of [nu]d>31.
Description
Technical field
The present invention relates to opticglass, preform and optical element.
Background technology
Although it varies in size the optical system of digital camera, pick up camera etc. but all comprises the bleeding that is called as aberration.This aberration is categorized as monochromatic aberration and chromatic aberation, and especially chromatic aberation depends on the material behavior of the lens that use in optical system strongly.
General chromatic aberation is by combining the convex lens of low dispersion and the concavees lens of high dispersion are revised, but this combination only can be revised the aberration of red area and green area, and the aberration of blue region can be residual.The aberration of this blue region that can not remove is completely called secondary spectrum.In order to revise secondary spectrum, need to consider that the trend of the g ray (435.835nm) of blue region is carried out optical design.Now, use partial dispersion than (θ g, F) index as the optical characteristics of paying close attention in optical design.Above-mentioned combination has in the optical system of the lens of low dispersion and the lens of high dispersion, in the lens of low dispersion side, use partial dispersion than (θ g, F) large optical material, in the lens of high dispersion side, use partial dispersion than (θ g, F) little optical material, thus secondary spectrum can be revised well.
Partial dispersion is represented by following formula (1) than (θ g, F).
θg,F＝(n
g-n
F)/(n
F-n
C)······(1)
In opticglass, (ν is roughly linear between d) than (θ g, F) and Abbe number to represent the partial dispersion of partial dispersion in short wavelength region.The straight line that represents this relation is adopting partial dispersion than (θ g, F) for the longitudinal axis, adopt Abbe number (ν d) on the rectangular coordinates of transverse axis with connect the partial dispersion of retouching out NSL7 and PBM2 than and the straight line of 2 of Abbe number represent, be called reference line (with reference to Fig. 1).As the normal glass of the benchmark of reference line, according to each opticglass manufacturers and difference, but each company all defines with essentially identical slope and intercept.(NSL7 and PBM2 are the opticglass that Obara Corporation manufactures, (ν is d) 36.3 to the Abbe number of PBM2, partial dispersion is than (θ g, F) be 0.5828, (ν d) is 60.5 to the Abbe number of NSL7, partial dispersion is 0.5436 than (θ g, F).)
At this, as the Abbe number (ν glass d), the opticglass shown in known for example patent documentation 1～3 that have more than 25 and below 35.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2011-213554 communique
Patent documentation 2: TOHKEMY 2012-006788 communique
Patent documentation 3: TOHKEMY 2009-179522 communique
Summary of the invention
the problem that invention will solve
But the partial dispersion of disclosed glass, than not little, is not enough to be used as the lens of revising aforementioned secondary spectrum in patent documentation 1～3.
In addition,, in order to reduce the material cost of opticglass, expect that the cost of material of the each composition that forms opticglass is cheap as far as possible.But the glass of recording in patent documentation 1～3 is difficult to tackle fully such requirement.
The present invention has put in view of the above problems, its object is, obtain more at an easy rate in the scope of specific refractory power (nd) in expecting and Abbe number (ν d) and partial dispersion less and for the high opticglass of the transmitance of visible ray than (θ g, F).
for the scheme of dealing with problems
The inventor etc. go deep into experimental study repeatedly in order to address the above problem, found that by being used in combination SiO
2composition and other composition, and in the scope of the content that makes them in regulation, thereby even if make the Nb that material cost is high
2o
5the content of composition reduces, and also can obtain high refractive index, low Abbe number (high dispersion), lower part dispersion ratio, improves the visible light transmissivity of glass and the devitrification of glass is reduced, thereby complete the present invention.
Particularly, the discovery such as inventor is by being used in combination SiO
2composition and BaO composition, and in the scope of the content that makes them in regulation, can obtain these effects.
In addition, the discovery such as inventor is by making SiO
2in the scope of the content of composition and CaO composition in regulation and adjust the content of other composition, also can obtain these effects.
Particularly, the invention provides following scheme.
(1) opticglass, wherein, in quality %, contains the SiO more than 10.0% and below 40.0%
2composition, Nb more than 5.0% and below 50.0%
2o
5composition, (ν d) to have Abbe number more than 25 and below 35, partial dispersion is than (θ g, F) and Abbe number (ν d) between in the scope of ν d≤31 meet (0.00162 × ν d+0.63622)≤(θ g, F) relation of≤(0.00275 × ν d+0.68125), in the scope of ν d>31, meet the relation of (0.00162 × ν d+0.63622)≤(θ g, F)≤(0.00162 × ν d+0.64622).
(2) according to the opticglass (1) described, wherein, in quality %, the content of BaO composition is below 50.0%.
(3) according to the opticglass (1) or (2) described, wherein, in quality %, contain the BaO composition more than 1.0% and below 50.0%.
(4) according to the opticglass described in any one in (1)～(3), wherein, in quality %, Li
2the content of O composition is below 10.0%.
(5) according to the opticglass described in any one in (1)～(4), wherein, in quality %, the content of CaO composition is below 30.0%.
(6) according to the opticglass described in any one in (1)～(5), wherein, in quality %,
MgO composition is 0～20.0%,
SrO composition is 0～25.0%.
(7) according to the opticglass described in any one in (1)～(6), wherein, quality and (MgO+CaO+SrO) be below 30.0%.
(8) according to the opticglass described in any one in (1)～(7), wherein, in quality %,
Na
2o composition is 0～20.0%,
K
2o composition is 0～15.0%.
(9) according to the opticglass described in any one in (1)～(8), wherein, Rn
2the quality of O composition and be below 20.0%, formula Rn
2in O, Rn be select in the group of free Li, Na, K, Cs composition more than a kind.
(10) according to the opticglass described in any one in (1)～(9), wherein, in quality %, contain the ZrO more than 1.0% and below 15.0%
2composition, contain the TiO exceeding below 0% and 20.0%
2composition.
(11) according to the opticglass described in any one in (1)～(10), wherein, mass ratio ZrO
2/ Nb
2o
5be more than 0.10 and below 3.00.
(12) according to the opticglass described in any one in (1)～(11), wherein, in quality %, WO
3the content of composition is below 20.0%.
(13) according to the opticglass described in any one in (1)～(12), wherein, quality and (TiO
2+ Nb
2o
5+ WO
3) be more than 10.0% and below 50.0%.
(14) according to the opticglass described in any one in (1)～(13), wherein, in quality %, B
2o
3the content of composition is below 15.0%.
(15) according to the opticglass described in any one in (1)～(14), wherein, in quality %,
La
2o
3composition is 0～15.0%,
Gd
2o
3composition is 0～10.0%,
Y
2o
3composition is 0～10.0%,
Yb
2o
3composition is 0～10.0%,
Lu
2o
3composition is 0～10.0%.
(16) according to the opticglass described in any one in (1)～(15), wherein, quality and (B
2o
3+ La
2o
3) be below 20.0%.
(17) according to the opticglass described in any one in (1)～(16), wherein, in quality %,
Al
2o
3composition is 0～15.0%,
ZnO composition is 0～10.0%,
GeO
2composition is 0～10.0%,
Ga
2o
3composition is 0～10.0%,
P
2o
5composition is 0～10.0%,
Ta
2o
5composition is 0～10.0%,
Bi
2o
3composition is 0～10.0%,
TeO
2composition is 0～10.0%,
Sb
2o
3composition is 0～1.0%.
(18) according to the opticglass described in any one in (1)～(17), it has the specific refractory power (nd) more than 1.70 and below 1.95.
(19) according to the opticglass described in any one in (1)～(18), wherein, spectrophotometric transmittance is shown as 70% wavelength (λ
70) be below 450nm.
(20) preform that attrition process is used and/or precision press molding is used, it is formed by the opticglass described in any one in (1)～(19).
(21) optical element, it is that the opticglass described in any one in (1)～(19) is carried out to grinding and/or grinding forms.
(22) optical element, it is the opticglass described in any one in (1)～(19) to be carried out to precision press molding form.
the effect of invention
According to the present invention, can obtain more at an easy rate in the scope of specific refractory power (nd) in expecting and Abbe number (ν d) and partial dispersion less and for the high opticglass of the transmitance of visible ray than (θ g, F).
Brief description of the drawings
Fig. 1 represents taking partial dispersion than (θ g, F) as the longitudinal axis, taking the Abbe number (figure of the reference line that ν d) represents in the rectangular coordinates of transverse axis.
Fig. 2 represents that the application's the partial dispersion of embodiment is than (θ g, F) and the Abbe number (figure of ν relation d).
Embodiment
Opticglass of the present invention, in quality %, contains the SiO more than 10.0% and below 40.0%
2composition, Nb more than 5.0% and below 50.0%
2o
5composition, (ν d) to have Abbe number more than 25 and below 35, partial dispersion is than (θ g, F) and Abbe number (ν d) between in the scope of ν d≤31 meet (0.00162 × ν d+0.63622)≤(θ g, F) relation of≤(0.00275 × ν d+0.68125), in the scope of ν d>31, meet the relation of (0.00162 × ν d+0.63622)≤(θ g, F)≤(0.00162 × ν d+0.64622).By by Nb
2o
5the content of composition is reduced in the scope of regulation, thereby reduces expensive Nb
2o
5the usage quantity of composition, therefore the material cost of opticglass reduces.By and use SiO
2composition and BaO composition, and their content is established within the limits prescribed, thereby even if make the Nb that material cost is high
2o
5the content of composition reduces, and also can obtain high refractive index, low Abbe number (high dispersion), lower part dispersion ratio, improves the visible light transmissivity of glass and the devitrification of glass is reduced.
Particularly, the 1st opticglass, in quality %, contains the SiO more than 10.0% and below 40.0%
2composition, Nb more than 5.0% and below 50.0%
2o
5composition, BaO composition more than 1.0% and below 50.0%, (ν d), in partial dispersion, than (θ g, F) and Abbe number, (ν meets above-mentioned relation between d) to have Abbe number more than 25 and below 35.By and use SiO
2composition and BaO composition, establish their content within the limits prescribed, thereby even if make the Nb that material cost is high
2o
5the content of composition reduces, and also can obtain high refractive index, low Abbe number (high dispersion), lower part dispersion ratio, improves the visible light transmissivity of glass and the devitrification of glass is reduced.
In addition, the 2nd opticglass, in quality %, contains the SiO more than 10.0% and below 40.0%
2composition, Nb more than 5.0% and below 50.0%
2o
5composition, the content of CaO composition is below 30.0%, (ν d), in partial dispersion, than (θ g, F) and Abbe number, (ν meets above-mentioned relation between d) to have Abbe number more than 25 and below 35.By by SiO
2the content of other composition is set within the limits prescribed and adjusted to the content of composition and CaO composition, thereby even if make the Nb that material cost is high
2o
5the content of composition reduces, and also can obtain high refractive index, low Abbe number (high dispersion), lower part dispersion ratio, improves the visible light transmissivity of glass and the devitrification of glass is reduced.
Thus, according to opticglass of the present invention, can obtain more at an easy rate in the scope of specific refractory power (nd) in expecting and Abbe number (ν d) little, partial dispersion is less than (θ g, F), for the high opticglass of the transmitance of visible ray and use its preform and optical element.
Below, be described in detail for the embodiment of opticglass of the present invention, but the present invention is not limited to following embodiment, in the scope of object of the present invention, can be suitably changed and implement.It should be noted that,, there is the situation that suitably description thereof is omitted in the place of repeating for explanation, but and the purport of non-limiting invention.
[glass ingredient]
Below narration forms the compositing range of each composition of opticglass of the present invention.In this specification sheets, in case of no particular description, the content of each composition is all used with respect to the quality % of the glass total mass of oxide compound conversion composition and is represented.Here, " oxide compound convert composition " refers to: suppose as all decomposition and become oxide compound in the situation that in the time of melting such as the oxide compound of the raw material of glass constituent of the present invention, composite salt, metal fluoride, taking the total mass of this generation oxide compound as 100 quality %, represent the composition of each composition contained in glass.
< is about essential composition, any composition >
SiO
2composition is that promotion forms stable glass, also reduces as the not essential composition of preferred devitrification (generation of crystallisate) of opticglass.
Particularly, by making SiO
2the content of composition is more than 10.0%, thereby can obtain the glass of devitrification resistance excellence and can significantly not improve the partial dispersion ratio of glass.In addition, can reduce thus devitrification while reheating, painted.Therefore, SiO
2the content of composition is preferably using 10.0% as lower limit, more preferably using 12.0% as lower limit, further preferably using 14.0% as lower limit.
On the other hand, by by SiO
2the content of composition is made as below 40.0%, thereby the specific refractory power of glass is difficult for the rising that therefore reduction can easily obtain the high refractive index of expecting and can suppress the partial dispersion ratio of glass.In addition can keep well thus, the meltbility of glass.Therefore, SiO
2the content of composition preferably using 40.0% as the upper limit, more preferably using 30.0% as the upper limit, further preferably using 26.0% as the upper limit.
SiO
2composition can use SiO as raw material
2, K
2siF
6, Na
2siF
6deng.
Nb
2o
5composition is following essential composition, this must composition by containing more than 5.0%, thereby can improve glass devitrification resistance, improve the specific refractory power of glass and reduce Abbe number and partial dispersion ratio.In addition can improve thus, the compression moulding of glass.Therefore, Nb
2o
5the content of composition is preferably using 5.0% as lower limit, more preferably using 6.0% as lower limit, further preferably using 7.0% as lower limit, further preferably using 10.0% as lower limit, further preferably using 13.0% as lower limit.
On the other hand, by by Nb
2o
5the content of composition is made as below 50.0%, thereby can reduce the material cost of glass.The rising of the melting temperature (Tm) in addition, can suppress glass manufacture time and reduction are by Nb
2o
5excessive the containing of composition and the devitrification that causes.Therefore, Nb
2o
5the content of composition is preferably made as below 50.0%, be more preferably made as lower than 43.0%, be further preferably made as lower than 40.0%, be further preferably made as lower than 36.0%.
Nb
2o
5composition can use Nb as raw material
2o
5deng.
BaO composition is following any composition, this any composition exceedes 0% by containing, thereby can improve the specific refractory power of glass, reduce the partial dispersion ratio of glass and improve the devitrification resistance, meltability of glass and can reduce the material cost of glass compared with other the alkaline earth composition such as CaO composition.In addition, can reduce thus devitrification while reheating, painted.Especially in the 1st opticglass, thereby BaO composition is the essential composition that more than 1.0% can obtain these effects by containing.Therefore, the content of BaO composition preferably can exceed 0%, more preferably can using 1.0% as lower limit, further preferably can using 2.5% as lower limit, further preferably can using 4.5% as lower limit, further preferably can using 6.0% as lower limit, further preferably can be using 10.0% as lower limit, further preferably can exceed 12.0%, further preferably can exceed 15.0%.
On the other hand, by the content of BaO composition is made as below 50.0%, can suppress the devitrification resistance causing, the deterioration of chemical durability by excessive the containing of BaO composition.Therefore, the content of BaO composition preferably using 50.0% as the upper limit, more preferably using 48.0% as the upper limit, further preferably using 45.0% as the upper limit.
BaO composition can use BaCO as raw material
3, Ba (NO
3)
2deng.
Li
2o composition is following any composition, and this any composition exceedes 0% by containing, and can reduce the partial dispersion ratio of glass, can improve the meltbility of glass and reduce second-order transition temperature.Therefore, Li
2the content of O composition preferably can exceed 0%, more preferably can exceed 0.5%, further preferably can exceed 1.0%, further can be preferably more than 1.2%.
On the other hand, by by Li
2the content of O composition is made as below 10.0%, can suppress the reduction of specific refractory power and reduce due to Li
2excessive the containing of O composition and while causing the formation of glass, opacification, the crystallization in the time of reheating and improve the chemical durability of glass.
Therefore, Li
2the content of O composition is preferably below 10.0%, more preferably below 8.0%, further preferably will be lower than 5.0% as the upper limit.
Li
2o composition can use Li as raw material
2cO
3, LiNO
3, LiF etc.
CaO composition is following any composition, and this any composition exceedes 0% by containing, and can obtain the opticglass that Abbe number is low, devitrification resistance is high, and improves the meltability of glass.Therefore, the content of CaO composition preferably can exceed 0%, more preferably can using 1.0% as lower limit, further preferably can using 3.5% as lower limit, further preferably can be using 6.7% as lower limit.
On the other hand, by the content of CaO composition is made as below 30.0%, can suppress the reduction of the specific refractory power of glass, the rising of Abbe number, the rising of partial dispersion ratio, and suppress the deterioration due to the excessive devitrification resistance that contains the glass causing of CaO composition.In addition, can reduce thus glass material cost, can reduce devitrification while reheating, painted.Therefore, the content of CaO composition preferably using 30.0% as the upper limit, more preferably using 25.0% as the upper limit, further preferably using 22.0% as the upper limit, further preferably using 21.0% as the upper limit, further preferably using 20.0% as the upper limit.
CaO composition can use CaCO as raw material
3, CaF
2deng.
Thereby MgO composition is to exceed 0% any composition that can reduce the melt temperature of glass by containing.
On the other hand, by the content of MgO composition is made as below 20.0%, thereby can suppress glass specific refractory power reduction and reduce the devitrification of glass.In addition, can reduce thus devitrification while reheating, painted.Therefore, the content of MgO composition is preferably made as below 20.0%, is more preferably made as lower than 10.0%, is further preferably made as lower than 8.0%, is further preferably made as lower than 5.0%.
MgO composition can use MgO, MgCO as raw material
3, MgF
2deng.
Thereby SrO composition is by containing the specific refractory power that exceedes 0% raising glass and any composition that improves devitrification resistance.
Especially, by the content of SrO composition is made as below 25.0%, thereby can suppress the deterioration of the chemical durability of glass.Therefore, the content of SrO composition is preferably made as below 25.0%, is more preferably made as below 15.0%, is further preferably made as lower than 10.0%, is further preferably made as lower than 8.0%, is further preferably made as lower than 5.0%.
SrO composition can use Sr (NO as raw material
3)
2, SrF
2deng.
The total of the content of MgO composition, CaO composition and SrO composition (quality and) is preferably below 30.0%.Thus, can reduce the devitrification of the glass being caused by excessive the containing of these compositions and also can improve the chemical durability of glass.Therefore, quality and (MgO+CaO+SrO) be preferably made as below 30.0%, be more preferably made as below 25.0%, be further preferably made as lower than 20.0%, be further preferably made as lower than 16.0%.
RO composition (in formula, R select in the group of free Mg, Ca, Sr, Ba composition more than a kind) content and (quality and) be preferably below 60.0%.Thus, can reduce the excessive devitrification that contains the glass causing due to these compositions.Therefore, the quality of RO composition and be preferably made as below 60.0%, be more preferably made as below 55.0%, be further preferably made as lower than 50.0%, be further preferably made as lower than 48.0%.
On the other hand, the quality of RO composition and preferably can be made as and exceed 0%, more preferably can be made as more than 1.0%, further preferably can be made as more than 5.0%, further preferably can be made as more than 10.0%.
Na
2o composition and K
2o composition is following any composition, and this any composition is by least any one contains and exceedes 0%, can reduce glass partial dispersion ratio, can improve the meltbility of glass and reduce second-order transition temperature.
On the other hand, by by Na
2the content of O composition is made as below 20.0%, can make specific refractory power be difficult for reducing and make chemical durability be difficult for worsening.In addition, the devitrification resistance can improve glass and form time, reduces devitrification while reheating, painted.
Therefore, Na
2the content of O composition is preferably made as below 20.0%, be more preferably made as lower than 10.0%, be further preferably made as lower than 6.0%, be further preferably made as below 3.4%, be further preferably made as below 2.8%.
In addition, by by K
2the content of O composition is made as below 15.0%, thereby can make chemical durability be difficult for worsening.In addition, the devitrification resistance can improve glass and form time, reduces devitrification while reheating, painted.
Therefore, K
2the content of O composition is preferably made as below 15.0%, be more preferably made as lower than 10.0%, be further preferably made as lower than 6.0%, be further preferably made as below 3.4%, be further preferably made as below 2.0%.
Na
2o composition and K
2o composition can use Na as raw material
2cO
3, NaNO
3, NaF, Na
2siF
6, K
2cO
3, KNO
3, KF, KHF
2, K
2siF
6deng.
Cs
2thereby O composition is to exceed 0% any composition that can reduce second-order transition temperature by containing.
On the other hand, by by Cs
2the content of O composition is made as below 10.0%, can reduce by Cs
2excessive the containing of O composition and the devitrification of the glass that causes.Therefore, Cs
2the content of O composition preferably using 10.0% as the upper limit, more preferably using 5.0% as the upper limit, further preferably using 3.0% as the upper limit.
Cs
2o composition can use Cs as raw material
2cO
3, CsNO
3deng.
Rn
2o composition (in formula, Rn be select in the group of free Li, Na, K, Cs composition more than a kind) content quality and be preferably below 20.0%.Thus, can make glass specific refractory power be difficult for reduce, reduce glass form time devitrification.Therefore, Rn
2the total content of O composition preferably using 20.0% as the upper limit, more preferably using 15.0% as the upper limit, further preferably using 11.0% as the upper limit, further preferably using 9.0% as the upper limit, further preferably using 7.5% as the upper limit, further preferably using 5.5% as the upper limit.
ZrO
2composition is following any composition, and this any composition exceedes 0% by containing, and can improve specific refractory power and Abbe number, the reduction partial dispersion ratio of glass and improve devitrification resistance.In addition, can reduce thus devitrification while reheating, painted.Therefore, ZrO
2the content of composition preferably can be made as and exceed 0%, more preferably can be made as more than 1.0%, more preferably can be made as more than 3.0%, further preferably can be made as and exceed 4.5%.
On the other hand, by by ZrO
2the content of composition is made as below 15.0%, thereby can reduce the devitrification of glass and can easily obtain the more glass of homogeneous.Therefore, ZrO
2the content of composition preferably using 15.0% as the upper limit, more preferably using 12.0% as the upper limit, further preferably using 9.0% as the upper limit.
ZrO
2composition can use ZrO as raw material
2, ZrF
4deng.
TiO
2composition is following any composition, and this any composition exceedes 0% by containing, and can improve the specific refractory power of glass and reduce Abbe number, improves devitrification resistance.Therefore, TiO
2the content of composition is preferably made as and exceedes 0%, is more preferably made as and exceedes 0.5%, further preferably can using 1.0% as lower limit, further preferably can be using 1.5% as lower limit.
On the other hand, by by TiO
2the content of composition is made as below 20.0%, can reduce glass painted, improve the inside transmitance of glass.In addition, thus, partial dispersion rises than being difficult for, and therefore can easily obtain the lower part dispersion ratio close to the expectation of reference line.Therefore, TiO
2the content of composition preferably using 20.0% as the upper limit, more preferably using 17.0% as the upper limit, further preferably using 14.0% as the upper limit.
TiO
2composition can use TiO as raw material
2deng.
ZrO
2the content of composition is with respect to Nb
2o
5the ratio of the content of composition is preferably more than 0.10 and below 3.00.
Especially,, by this ratio is made as more than 0.10, can improves the specific refractory power of glass and improve devitrification resistance and reduce the material cost that partial dispersion compares and can reduce glass.Therefore, mass ratio ZrO
2/ Nb
2o
5preferably using 0.10 as lower limit, more preferably using 0.12 as lower limit, further preferably using 0.17 as lower limit, further preferably using 0.23 as lower limit, further preferably using 0.25 as lower limit.
On the other hand, by this ratio is made as below 3.00, can reduce the devitrification of glass.Therefore, mass ratio ZrO
2/ Nb
2o
5preferably using 3.00 as the upper limit, more preferably using 2.00 as the upper limit, further preferably using 1.00 as the upper limit, further preferably using 0.60 as the upper limit.
WO
3composition is following any composition, and this any composition exceedes 0% by containing, and improves the specific refractory power of glass and reduces Abbe number, improves the devitrification resistance of glass and the meltability of raising glass.
On the other hand, by by WO
3the content of composition is made as below 20.0%, thus the partial dispersion that can make glass than be difficult for rising and reduce glass painted, improve inner transmitance.Therefore, WO
3the content of composition preferably using 20.0% as the upper limit, more preferably using 10.0% as the upper limit, further preferably using 8.0% as the upper limit, further preferably using 5.0% as the upper limit, further preferably using 2.5% as the upper limit.
WO
3composition can use WO as raw material
3deng.
TiO
2composition, Nb
2o
5composition and WO
3the content of composition and (quality and) be preferably more than 10.0% and below 50.0%.
By being somebody's turn to do and being made as more than 10.0%, thereby improve the specific refractory power of glass and improve devitrification resistance.Therefore, quality and (TiO
2+ Nb
2o
5+ WO
3) preferably using 10.0% as lower limit, more preferably using 10.0% as lower limit, further preferably using 15.0% as lower limit, further preferably using 21.0% as lower limit, further preferably using 25.0% as lower limit.
On the other hand, by being somebody's turn to do and being made as below 50.0%, can suppress the rising of the partial dispersion ratio of glass.Therefore, quality and (TiO
2+ Nb
2o
5+ WO
3) preferably using 50.0% as the upper limit, more preferably using 48.0% as the upper limit, further preferably using 44.0% as the upper limit, further preferably using 40.0% as the upper limit.
B
2o
3composition is following any composition, and this any composition exceedes 0% by containing, and promotes stable glass to form, thereby improves the meltability of devitrification resistance and raising glass.Therefore, B
2o
3the content of composition preferably can exceed 0%, more preferably can using 1.0% as lower limit, further preferably can using 1.5% as lower limit, further preferably can be using 1.8% as lower limit.
On the other hand, by by B
2o
3the content of composition is made as below 15.0%, thereby suppresses the rising of the reduction of specific refractory power and the partial dispersion ratio of inhibition glass.In addition the devitrification, can reduce thus the reheating of glass time.Therefore, B
2o
3the content of composition is preferably made as below 15.0%, be more preferably made as lower than 10.0%, be further preferably made as lower than 5.0%, be further preferably made as below 3.1%, be further preferably made as below 2.6%.
B
2o
3composition can use H as raw material
3bO
3, Na
2b
4o
7, Na
2b
4o
710H
2o, BPO
4deng.
La
2o
3composition, Gd
2o
3composition, Y
2o
3composition, Yb
2o
3composition and Lu
2o
3composition is following any composition, and this any composition is by least any one contains and exceedes 0%, can improve the specific refractory power of glass and Abbe number and reduce partial dispersion ratio.Wherein, La
2o
3the content of composition preferably can exceed 0%, more preferably can using 0.5% as lower limit, further preferably can be using 1.0% as lower limit.
On the other hand, by by La
2o
3the content of composition is made as below 15.0%, thus can reduce glass devitrification, can suppress Abbe number rising, reduce the proportion of glass and can reduce the material cost of glass.Therefore, La
2o
3the content of composition is preferably made as below 15.0%, is more preferably made as below 12.0%, be further preferably made as lower than 10.0%, be further preferably made as lower than 8.0%.
In addition, by by Gd
2o
3composition, Y
2o
3composition, Yb
2o
3composition and Lu
2o
3composition content is separately made as below 10.0%, thereby can reduce the material cost of the devitrification of glass, the rising that can suppress Abbe number and reduction glass.Especially, by by Gd
2o
3composition, Yb
2o
3composition and Lu
2o
3composition content is separately made as below 10.0%, thereby can reduce the proportion of glass.Therefore, Gd
2o
3composition, Y
2o
3composition, Yb
2o
3composition and Lu
2o
3composition content separately is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
La
2o
3composition, Gd
2o
3composition, Y
2o
3composition, Yb
2o
3composition and Lu
2o
3composition can use La as raw material
2o
3, La (NO
3)
3xH
2o (X is arbitrary integer), Y
2o
3, YF
3, Gd
2o
3, GdF
3, Yb
2o
3, Lu
2o
3deng.
Ln
2o
3composition (in formula, Ln select in the group of free La, Gd, Y, Yb, Lu composition more than a kind) content and (quality and) be preferably below 15.0%.Thus, can reduce the material cost of the devitrification of glass, the rising that can suppress Abbe number and reduction glass.Therefore, Ln
2o
3the quality of composition and be preferably made as below 15.0%, be more preferably made as below 12.0%, be further preferably made as lower than 10.0%, be further preferably made as lower than 8.0%.
B
2o
3composition and La
2o
3total metering of composition (quality and) is preferably below 20.0%.Thus, can obtain the high refractive index of expecting and obtain high permeability.Therefore, quality and (B
2o
3+ La
2o
3) preferably using 20.0% as the upper limit, more preferably using 15.0% as the upper limit, further preferably using 10.0% as the upper limit, further preferably using 8.5% as the upper limit.
It should be noted that quality and (B
2o
3+ La
2o
3) to improve the viewpoint of devitrification resistance of glass, preferably can exceed 0%, more preferably can exceed 0.1%, further preferably can exceed 0.5%.
Al
2o
3composition and Ga
2o
3composition is following any composition, and this any composition is by least any one contains and exceedes 0%, can improve glass chemical durability, improve the devitrification resistance of glass.
On the other hand, by by Al
2o
3the content of composition is made as below 15.0% or by Ga
2o
3the content of composition is made as below 10.0%, can reduce by Al
2o
3composition, Ga
2o
3excessive the containing of composition and the devitrification that causes.In addition, can reduce thus devitrification while reheating, painted.
Therefore, Al
2o
3the content of composition is preferably made as below 15.0%, be more preferably made as lower than 10.0%, be further preferably made as lower than 7.0%, be further preferably made as lower than 5.0%.
In addition Ga,
2o
3the content of composition is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
Al
2o
3composition and Ga
2o
3composition can use Al as raw material
2o
3, Al (OH)
3, AlF
3, Ga
2o
3, Ga (OH)
3deng.
ZnO composition is following any composition, and this any composition exceedes 0% by containing, and can reduce partial dispersion ratio, raising devitrification resistance, the reduction second-order transition temperature of glass.Therefore, the content of ZnO composition preferably can exceed 0%, more preferably can using 0.5% as lower limit, further preferably can using 1.0% as lower limit, further preferably can be using 2.0% as lower limit.
On the other hand, by the content of ZnO composition is made as below 10.0%, devitrification can reduce the reheating of glass time, painted, and improve the chemical durability of glass.Therefore, the content of ZnO composition is preferably made as below 10.0%, is more preferably made as lower than 8.0%, is further preferably made as lower than 5.0%.
ZnO composition can use ZnO, ZnF as raw material
2deng.
GeO
2composition is following any composition, and this any composition exceedes 0% by containing, and can improve the specific refractory power of glass, devitrification when making stabilization and reducing moulding.
On the other hand, by by GeO
2the content of composition is made as below 10.0%, reduces expensive GeO
2the usage quantity of composition, therefore can reduce the material cost of glass.Therefore, GeO
2the content of composition is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
GeO
2composition can use GeO as raw material
2deng.
P
2o
5thereby composition is any composition by containing the stability that exceedes 0% raising glass.
On the other hand, by by P
2o
5the content of composition is made as below 10.0%, can reduce by P
2o
5excessive the containing of composition and the devitrification that causes.Therefore, P
2o
5the content of composition is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
P
2o
5composition can use Al (PO as raw material
3)
3, Ca (PO
3)
2, Ba (PO
3)
2, BPO
4, H
3pO
4deng.
Ta
2o
5composition is following any composition, and this any composition exceedes 0% by containing, and can improve the devitrification resistance of the specific refractory power of glass, the Abbe number that reduces glass and partial dispersion ratio and raising glass.
On the other hand, by by Ta
2o
5the content of composition is made as below 10.0%, thereby reduces rare mineral resource Ta
2o
5the usage quantity of composition and glass are easily more melting under low temperature, therefore can reduce the production cost of glass.In addition can reduce by Ta thus,
2o
5excessive the containing of composition and the devitrification of the glass that causes.Therefore, Ta
2o
5the content of composition is preferably made as below 10.0%, is more preferably made as below 8.0%, is further preferably made as below 5.0%.Especially, so that the viewpoint that the material cost of glass reduces also can not contain Ta
2o
5composition.
Ta
2o
5composition can use Ta as raw material
2o
5deng.
Bi
2o
3composition is following any composition, and this any composition exceedes 0% by containing, and can improve specific refractory power, the reduction Abbe number of glass and can reduce second-order transition temperature.
On the other hand, by by Bi
2o
3the content of composition is made as below 10.0%, and the partial dispersion that can make glass rises than being difficult for, and can reduce glass painted, improve inner transmitance.Therefore, Bi
2o
3the content of composition is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
Bi
2o
3composition can use Bi as raw material
2o
3deng.
TeO
2composition is following any composition, and this any composition exceedes 0% by containing, can improve glass specific refractory power, reduce glass partial dispersion ratio and can reduce second-order transition temperature.
On the other hand, by by TeO
2the content of composition is made as below 10.0%, can reduce glass painted, improve inner transmitance.In addition, by reducing expensive TeO
2the usage quantity of composition, can obtain the more cheap glass of material cost.Therefore, TeO
2the content of composition is preferably made as below 10.0%, be more preferably made as lower than 8.0%, be further preferably made as lower than 5.0%.
TeO
2composition can use TeO as raw material
2deng.
Sb
2o
3composition is following any composition, and this any composition exceedes 0% by containing, can promote glass deaeration, make glass clarifying.
On the other hand, by by Sb
2o
3the content of composition is made as below 1.0%, thereby the excessive foaming can make glass melting time is difficult for producing, and can make Sb
2o
3composition is difficult for and melting equipment precious metals such as (especially) Pt alloying.Therefore, Sb
2o
3the content of composition preferably using 1.0% as the upper limit, more preferably using 0.5% as the upper limit, further preferably using 0.1% as the upper limit.Wherein, in the situation of the impact on the environment of attention opticglass, also can not contain Sb
2o
3composition.
Sb
2o
3composition can use Sb as raw material
2o
3, Sb
2o
5, Na
2h
2sb
2o
75H
2o etc.
It should be noted that, make the composition of glass clarifying, deaeration be not limited to above-mentioned Sb
2o
3composition, can use known finings, deaerating agent or their combination in the field of glass manufacture.
< is for the composition > that should not contain
Then, describe for the composition that should not contain in opticglass of the present invention and the composition that preferably do not contain.
Other composition can add as required in the scope of characteristic of glass of not damaging the present application.Wherein, remove beyond Ti, Zr, Nb, W, La, Gd, Y, Yb, Lu, each transiting metal components such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, independent or compound contain on a small quantity in the situation that respectively, also there is the glass coloring of making, produce at the specific wavelength place of visible region the character absorbing, therefore particularly using in the opticglass of wavelength of visible region, preferably do not contain in fact.
In addition lead compound and the As such as PbO,
2o
3be the composition that environmental pressure is high Deng arsenic compound, therefore it is desirable to, do not contain in fact, remove sneaking in addition of can not keeping away and never contain.
And then, there is in recent years the tendency of controlling use as harmful chemical goods and materials in each composition of Th, Cd, Tl, Os, Be and Se, not only in the manufacturing process of glass, in the processing after manufacturing procedure and commercialization, all need handling aspect environmental cure.Therefore, in the case of paying attention to the impact on environment, preferably in fact not containing these elements.
For glass composition of the present invention, its composition is to represent with the quality % of the glass total mass of the composition that converts with respect to oxide compound, because of instead of directly with % by mole record represent, meet in the present invention each composition of existing in the glass composition of desired each characteristic in % by mole composition representing by the oxide compound composition that converts, be roughly following value.
SiO
2composition be 15.0～60.0 % by mole and
Nb
2o
5composition is 3.0～30.0 % by mole
And
C
ao composition is 0～45.0 % by mole
B
ao composition is 0～20.0 % by mole
Li
2o composition is 0～30.0 % by mole
MgO composition is 0～40.0 % by mole
SrO composition is 0～20.0 % by mole
Na
2o composition is 0～35.0 % by mole
K
2o composition is 0～20.0 % by mole
Cs
2o composition is 0～10.0 % by mole
ZrO
2composition is 0～15.0 % by mole
TiO
2composition is 0～20.0 % by mole
WO
3composition is 0～20.0 % by mole
B
2o
3composition is 0～20.0 % by mole
La
2o
3composition is 0～10.0 % by mole
Gd
2o
3composition is 0～8.0 % by mole
Y
2o
3composition is 0～10.0 % by mole
Yb
2o
3composition is 0～8.0 % by mole
Lu
2o
3composition is 0～8.0 % by mole
Al
2o
3composition is 0～15.0 % by mole
ZnO composition is 0～15.0 % by mole
GeO
2composition is 0～10.0 % by mole
Ga
2o
3composition is 0～8.0 % by mole
P
2o
5composition is 0～20.0 % by mole
Ta
2o
5composition is 0～8.0 % by mole
Bi
2o
3composition is 0～5.0 % by mole
TeO
2composition is 0～10.0 % by mole
Sb
2o
3composition is 0～1.0 % by mole
Especially,, in the 1st opticglass, be roughly the value of 1.0～20.0 % by mole with % by mole content of the BaO composition representing.
[manufacture method]
Opticglass example of the present invention is made as described below.Mixing equably above-mentioned raw materials makes each composition in the content range of regulation, the mixture of making is put in platinum crucible, quartz crucible or alumina crucible and carried out thick melting, then put in golden crucible, platinum crucible, platinum alloy crucible or iridium crucible, the temperature range meltings of 1100～1400 DEG C 3～5 hours, stirring homogenizes and carries out froth breaking etc., then be down to and carry out final stirring after the temperature of 1000～1400 DEG C and remove striped/texture, be poured in mould, make thereby carry out Slow cooling.
< physical property >
Opticglass of the present invention preferably has the Abbe number of the scope of high refractive index and regulation.
The specific refractory power (nd) of opticglass of the present invention is preferably using 1.70 as lower limit, more preferably using 1.75 as lower limit, further preferably using 1.80 as lower limit, further preferably using 1.82 as lower limit.The upper limit of this specific refractory power can be preferably below 1.95, can be more preferably below 1.90, further preferably can be lower than 1.88, further preferably can be lower than 1.86.
The Abbe number of opticglass of the present invention (ν d) preferably using 35 as the upper limit, more preferably using 33 as the upper limit, further preferably using 32 as the upper limit.On the other hand, (ν d) is preferably made as more than 25 the Abbe number of opticglass of the present invention, be more preferably made as and exceed 27, be further preferably made as and exceed 29.
The opticglass of the present invention with such specific refractory power and Abbe number is useful in optical design, especially can realize high imaging characteristic etc. and realize the miniaturization of optical system, therefore can widen the degree of freedom of optical design.
Opticglass of the present invention has lower part dispersion than (θ g, F).
More specifically, the partial dispersion of opticglass of the present invention is than (θ g, F) and Abbe number (ν meets (0.00162 × ν d+0.63622)≤(θ g in the scope of ν d≤31 between d), F) relation of≤(0.00275 × ν d+0.68125) and meet the relation of (0.00162 × ν d+0.63622)≤(θ g, F)≤(0.00162 × ν d+0.64622) in the scope of ν d>31.Thus, can obtain having the partial dispersion that has approached reference line than the opticglass of (θ g, F), therefore can reduce the chromatic aberation of the optical element being formed by this opticglass.
The partial dispersion of ν d≤31 is preferably (0.00162 × ν d+0.63622), more preferably (0.00162 × ν d+0.63822), more preferably (0.00162 × ν d+0.63922), more preferably (0.00162 × ν d+0.64022) than the lower limit of (θ g, F).
The partial dispersion of ν d≤31 is preferably (0.00275 × ν d+0.68125), more preferably (0.00275 × ν d+0.68025), more preferably (0.00275 × ν d+0.67925), more preferably (0.00275 × ν d+0.67900), more preferably (0.00275 × ν d+0.67895) than the upper limit of (θ g, F).
The partial dispersion of ν d>31 is preferably (0.00162 × ν d+0.63622), more preferably (0.00162 × ν d+0.63822), more preferably (0.00162 × ν d+0.63922), more preferably (0.00162 × ν d+0.64022) than the lower limit of (θ g, F).
The partial dispersion of ν d>31 is preferably (0.00162 × ν d+0.64622), more preferably (0.00162 × ν d+0.64522), more preferably (0.00162 × ν d+0.64422), more preferably (0.00162 × ν d+0.64397), more preferably (0.00162 × ν d+0.64392) than the upper limit of (θ g, F).
It should be noted that, especially in Abbe number (d) little region of ν, the partial dispersion of general glass is than (θ g, F) be the value higher than reference line, (ν relation d) is by curve representation with Abbe number than (θ g, F) for the partial dispersion of general glass.But, be difficult to realize the approximate of this curve, therefore in the present invention, use taking the straight line of ν d=31 different slope as boundary has represent with general glass Comparatively speaking partial dispersion than (θ g, F) low this situation.
Opticglass of the present invention is preferably painted few.Especially,, when opticglass of the present invention is represented by the transmitance of glass, the sample of thickness 10mm shows the wavelength (λ of spectrophotometric transmittance 70%
70) be preferably 450nm following, more preferably 430nm following, more preferably below 420nm.In addition, the sample of the thickness 10mm of opticglass of the present invention shows the wavelength (λ of spectrophotometric transmittance 5%
5) be preferably 400nm following, more preferably 380nm following, more preferably below 360nm.Thus, the absorption limit of glass is positioned near of ultraviolet region, can improve the transparency of the glass of visible region, therefore can preferably this opticglass be used as to the material of the optical elements such as lens.
It is little that opticglass of the present invention is preferably proportion.More specifically, the proportion of opticglass of the present invention is preferably 5.50[g/cm
3] below.Thus, optical element, use the quality of its opticinstrument to be minimized, therefore can contribute to the lightweight of opticinstrument.Therefore, the proportion of opticglass of the present invention preferably using 5.50 as the upper limit, more preferably using 5.40 as the upper limit, preferably using 5.30 as the upper limit.It should be noted that, the proportion of opticglass of the present invention mostly roughly is more than 3.00, is more specifically more than 3.50, further specifically more than 4.00.
The proportion of opticglass of the present invention can be measured by standard JOGIS05-1975 " measuring method of the proportion of opticglass " based on Japanese optics nitre industry.
Devitrification resistance (in specification sheets, having the situation that is only called " devitrification resistance ") height when opticglass preferred glass of the present invention is made.Thus, the reduction of the transmitance that the crystallization of the glass can suppress to be made by glass time etc. causes, therefore this opticglass can be preferably used for lens etc. and will make in optical element that visible ray sees through.It should be noted that, the high scale of devitrification resistance while making as expression glass, for example, can list the situation that liquidus temperature is low.
The preferred compression moulding of opticglass of the present invention is good.Even if, preferred opticglass of the present invention does not produce devitrification and milky white in the front and back that reheat test (1) yet.Thus, even if be also difficult for causing devitrification and painted by the test that reheats of having envisioned the processing of hot repressing system, thereby make the light penetration of glass be difficult for losing, therefore can easily carry out being processed as with hot repressing system the processing that reheats of representative to glass.That is, can make the optical element of complicated shape by compression moulding, therefore can realize the manufacture of the good optical element of low cost of manufacture and productivity.
At this, reheating test (1) can carry out by the following method, described method is put in electric furnace on matrix refractory body for the test film of 15mm × 15mm × 30mm is loaded, reheat, through 150 minutes from normal temperature be warming up to transition temperature (Tg) than each sample high 80 DEG C～temperature (falling into the temperature of refractory body) of 150 DEG C, at this temperature, be incubated 30 minutes, then, be cooled to normal temperature, be fetched into outside stove, thereby 2 relative faces are ground to thickness 10mm can be observed from inside, then, glass specimen after visual observation is ground.
It should be noted that, the value that the transmitance that reheats the light (d ray) that has or not before and after test (1) devitrification and the milky white Visual Confirmation of for example can using, " not producing devitrification and milky white " to refer to the wavelength 587.56nm that for example reheats the test film after test (1) obtains divided by the transmitance of d ray that reheats the test film before test is roughly more than 0.80.
[preform and optical element]
The method that can use such as hot repressing to make the compression molding such as type, precision press molding is made glass forming body by the opticglass of made.; can make the preform that compression molding is used by opticglass; for this preform, carry out after hot repressing makes type, carrying out attrition process and making glass forming body or can carry out precision press molding for the preform that for example attrition process is made and make glass forming body.It should be noted that, the method for making glass forming body is not limited to these methods.
The glass forming body operating like this and make is useful in various optical elements, wherein, is especially preferred for the purposes of the optical element such as lens, prism.Thus, can reduce be provided with optical element optical system see through the bleeding causing because of chromatic aberation in light.Therefore, in the situation that being used for to photographic camera, this optical element can show more accurately reference object thing, the image that high definition ground projection goes out to expect more in the situation that this optical element is used for to projector.
Embodiment
At the composition of embodiments of the invention shown in table 1～table 14 (No.1～No.101) and comparative example (No.A) and specific refractory power (nd), Abbe number, (ν d), partial dispersion shows 5% and 70% wavelength (λ than (θ g, F), spectrophotometric transmittance
5, λ
70), proportion and reheat the result of test (groove heavy test).It should be noted that, following embodiment is illustrative object after all, is not limited to these embodiment.
The glass of embodiments of the invention and comparative example is following making all: as the raw material of each composition and selected suitable oxide compound separately, oxyhydroxide, carbonate, nitrate, fluorochemical, oxyhydroxide, the highly purified raw material that metaphosphoric acid compound etc. use conventionally in opticglass, according to reach each embodiment of representing in table and comparative example composition ratio mode weighing and mix equably, then put in platinum crucible, carry out melting for 3～5 hours with the temperature range of 1100～1400 DEG C with electric furnace according to the melting difficulty of glass composition, stirring homogenizes and after carrying out froth breaking etc., cooling the temperature to 1000～1400 DEG C of stirrings is poured in mould after homogenizing, thereby carry out Slow cooling and make glass.
At this, the specific refractory power of the glass of embodiment and comparative example (nd), Abbe number (ν d) and partial dispersion can standard JOGIS01-2003 based on Japanese optics nitre industry than (θ g, F) and measure.Then, for the Abbe number of obtaining (ν d) and partial dispersion than the value of (θ g, F), obtain in relational expression (θ g, F)=-a × ν d+b, slope a is 0.00162 and the intercept b of 0.00275 o'clock.It should be noted that, in this mensuration, glass used uses with the annealing cooling rate of-25 DEG C/hr and in annealing furnace, has carried out the glass of processing.
In addition, the transmitance of the glass of embodiment and comparative example is measured based on Japanese optics nitre industry meeting standard JOGIS02.It should be noted that, in the present invention, by measuring the transmitance of glass, thereby obtained paneless painted and coloring degree.Particularly, according to JISZ8722, to the parallel grinding object in the opposite of thickness 10 ± 0.1mm measure 200～800nm spectrophotometric transmittance, obtain λ
5(wavelength when transmitance 5%) and λ
70(wavelength when transmitance 70%).
In addition, the proportion of the glass of embodiment and comparative example is measured based on Japanese optics nitre industry meeting standard JOGIS05-1975 " measuring method of the proportion of opticglass ".
In addition,, for the glass of embodiment and comparative example, the front and back that reheat test with Visual Confirmation have or not devitrification and milky white.At this, reheating the devitrification of test front and back and milky white confirmation carries out as follows: the test film of 15mm × 15mm × 30mm is loaded on matrix refractory body and put in electric furnace, reheat to reheating temperature, at this temperature, be incubated 30 minutes, then, be cooled to normal temperature and be fetched into outside stove, can observe from inside thereby 2 relative faces are ground to thickness 10mm, then, have or not devitrification and milky white with the glass specimen that visual observation is ground.Now, for reheating that temperature is made as (Tg+80 DEG C～150 DEG C) even if time do not produce devitrification and milky white and yet do not produce devitrification and milky white glass when temperature is made as the temperature higher than (Tg+80 DEG C～150 DEG C) by reheating, " the heavy test of groove (type fall Try test) " is denoted as to "○".In addition, for reheating that temperature is made as at (Tg+80 DEG C～150 DEG C) although scope in specified temp time do not produce devitrification and milky whitely produce devitrification or milky white glass by reheating when temperature is made as the temperature higher than the scope of (Tg+80 DEG C～150 DEG C), " the heavy test of groove " is denoted as to " △ ".In addition,, for producing devitrification or milky white glass by reheating when temperature is made as the specified temp in the scope of (Tg+80 DEG C～150 DEG C), " the heavy test of groove " is denoted as to "×".
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
For the opticglass of embodiments of the invention, the partial dispersion of the glass of ν d≤31 is below (0.00275 × ν d+0.68125) than (θ g, F).In addition,, for the glass of ν d>31, partial dispersion is below (0.00162 × ν d+0.64622) than (θ g, F).On the other hand, the partial dispersion of the opticglass of embodiments of the invention is more than (0.00162 × ν d+0.63622) than (θ g, F)., (ν relation d) as shown in Figure 2 with Abbe number than (θ g, F) for the partial dispersion of the glass of the application's embodiment.Therefore known, their partial dispersion than (θ g, F) in expect scope in.
On the other hand, the glass of comparative example of the present invention (No.A) is ν d≤31 and partial dispersion exceedes (0.00275 × ν d+0.68125) than (θ g, F).Therefore clear and definite, the opticglass of embodiments of the invention and the glassy phase of comparative example ratio, (in ν relational expression d), having little partial dispersion than (θ g, F) with Abbe number.
In addition, the specific refractory power of the opticglass of embodiments of the invention (nd) is more than 1.70, more specifically, is more than 1.83 and this specific refractory power (nd) is below 1.95, is more specifically below 1.87, in the scope of expecting.
In addition, the Abbe number of the opticglass of embodiments of the invention (ν d) is more than 25, be more specifically more than 28 and this Abbe number (ν is d) below 35, is more specifically below 32, in the scope of expecting.
In addition the λ of the opticglass of embodiments of the invention,
70(wavelength when transmitance 70%) is below 450nm, more specifically for below 430nm.In addition the λ of the opticglass of embodiments of the invention,
5(wavelength when transmitance 5%) is below 400nm, more specifically for below 360nm.Therefore clear and definite, the opticglass of embodiments of the invention is high for the transmitance of visible ray, it is painted to be difficult to.
Therefore from the opticglass of embodiment, there is the specific refractory power (nd) of expectation and Abbe number (ν d), high for the transmitance of visible ray and chromatic aberation is little.
In addition, the proportion of the opticglass of embodiment is below 5.00, is more specifically below 4.50, in the scope of expecting.
In addition, the opticglass of embodiment is all difficult for causing devitrification and milky white before and after reheating test (1).Therefore infer, for the opticglass of embodiments of the invention, be difficult for causing owing to reheating the devitrification that causes, milky white, thereby there is high compression moulding.
And then the opticglass of use embodiment, forms lens preform, carries out compression molding for this lens preform, result can stably be processed as various lens shapes.
Known above, with illustrative object, the present invention is described in detail, the present embodiment is only for illustrating after all, those skilled in the art can carry out more changes in thought of the present invention and scope and complete not departing from.
Claims (22)
1. an opticglass, wherein, in quality %, contains the SiO more than 10.0% and below 40.0%
2composition, Nb more than 5.0% and below 50.0%
2o
5composition, (ν d) to have Abbe number more than 25 and below 35, partial dispersion is than (θ g, F) and Abbe number (ν d) between in the scope of ν d≤31 meet (0.00162 × ν d+0.63622)≤(θ g, F) relation of≤(0.00275 × ν d+0.68125), in the scope of ν d>31, meet the relation of (0.00162 × ν d+0.63622)≤(θ g, F)≤(0.00162 × ν d+0.64622).
2. opticglass according to claim 1, wherein, in quality %, the content of BaO composition is below 50.0%.
3. opticglass according to claim 1, wherein, in quality %, contains the BaO composition more than 1.0% and below 50.0%.
4. opticglass according to claim 1, wherein, in quality %, Li
2the content of O composition is below 10.0%.
5. opticglass according to claim 1, wherein, in quality %, the content of CaO composition is below 30.0%.
6. opticglass according to claim 1, wherein, in quality %,
MgO composition is 0～20.0%,
SrO composition is 0～25.0%.
7. opticglass according to claim 1, wherein, the quality of MgO+CaO+SrO and be below 30.0%.
8. opticglass according to claim 1, wherein, in quality %,
Na
2o composition is 0～20.0%,
K
2o composition is 0～15.0%.
9. opticglass according to claim 1, wherein, Rn
2the quality of O composition and be below 20.0%, formula Rn
2in O, Rn be select in the group of free Li, Na, K, Cs composition more than a kind.
10. opticglass according to claim 1, wherein, in quality %, contains the ZrO more than 1.0% and below 15.0%
2composition, exceed the TiO below 0% and 20.0%
2composition.
11. opticglass according to claim 1, wherein, mass ratio ZrO
2/ Nb
2o
5be more than 0.10 and below 3.00.
12. opticglass according to claim 1, wherein, in quality %, WO
3the content of composition is below 20.0%.
13. opticglass according to claim 1, wherein, TiO
2+ Nb
2o
5+ WO
3quality and be more than 10.0% and below 50.0%.
14. opticglass according to claim 1, wherein, in quality %, B
2o
3the content of composition is below 15.0%.
15. opticglass according to claim 1, wherein, in quality %,
La
2o
3composition is 0～15.0%,
Gd
2o
3composition is 0～10.0%,
Y
2o
3composition is 0～10.0%,
Yb
2o
3composition is 0～10.0%,
Lu
2o
3composition is 0～10.0%.
16. opticglass according to claim 1, wherein, B
2o
3+ La
2o
3quality and be below 20.0%.
17. opticglass according to claim 1, wherein, in quality %,
Al
2o
3composition is 0～15.0%,
ZnO composition is 0～10.0%,
GeO
2composition is 0～10.0%,
Ga
2o
3composition is 0～10.0%,
P
2o
5composition is 0～10.0%,
Ta
2o
5composition is 0～10.0%,
Bi
2o
3composition is 0～10.0%,
TeO
2composition is 0～10.0%,
Sb
2o
3composition is 0～1.0%.
18. opticglass according to claim 1, it has the specific refractory power (nd) more than 1.70 and below 1.95.
19. opticglass according to claim 1, wherein, spectrophotometric transmittance is shown as 70% wavelength (λ
70) be below 450nm.
20. 1 kinds of attrition process with and/or the preform used of precision press molding, it is formed by the opticglass described in any one in claim 1～19.
21. 1 kinds of optical elements, it is that the opticglass described in any one in claim 1～19 is carried out to grinding and/or grinding forms.
22. 1 kinds of optical elements, it is the opticglass described in any one in claim 1～19 to be carried out to precision press molding form.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013095764 | 2013-04-30 | ||
| JP2013095763 | 2013-04-30 | ||
| JP2013-095764 | 2013-04-30 | ||
| JP2013-095763 | 2013-04-30 | ||
| JP2014-056906 | 2014-03-19 | ||
| JP2014056906 | 2014-03-19 | ||
| JP2014-056905 | 2014-03-19 | ||
| JP2014056905 | 2014-03-19 |
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| CN104129918B CN104129918B (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410183617.1A Active CN104129918B (en) | 2013-04-30 | 2014-04-30 | Optical glass, preform, and optical element |
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| Country | Link |
|---|---|
| CN (1) | CN104129918B (en) |
| TW (1) | TWI616414B (en) |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524815A (en) * | 2002-12-27 | 2004-09-01 | Hoya株式会社 | Optical glass, press-molding glass gob and optical element |
| JP2009263141A (en) * | 2008-03-31 | 2009-11-12 | Ohara Inc | Optical glass, optical element and optical device |
| CN101932532A (en) * | 2008-01-31 | 2010-12-29 | Hoya株式会社 | Optical glass |
| JP2011037660A (en) * | 2009-08-07 | 2011-02-24 | Ohara Inc | Optical glass, lens preform and optical element |
| CN102164866A (en) * | 2008-09-30 | 2011-08-24 | 株式会社小原 | Optical glass and method for suppressing the deterioration of spectral transmittance |
| CN102367197A (en) * | 2010-06-24 | 2012-03-07 | 株式会社小原 | Optical glass, preform product and optical element |
-
2014
- 2014-04-30 CN CN201410183617.1A patent/CN104129918B/en active Active
- 2014-04-30 TW TW103115655A patent/TWI616414B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524815A (en) * | 2002-12-27 | 2004-09-01 | Hoya株式会社 | Optical glass, press-molding glass gob and optical element |
| CN101932532A (en) * | 2008-01-31 | 2010-12-29 | Hoya株式会社 | Optical glass |
| JP2009263141A (en) * | 2008-03-31 | 2009-11-12 | Ohara Inc | Optical glass, optical element and optical device |
| CN102164866A (en) * | 2008-09-30 | 2011-08-24 | 株式会社小原 | Optical glass and method for suppressing the deterioration of spectral transmittance |
| JP2011037660A (en) * | 2009-08-07 | 2011-02-24 | Ohara Inc | Optical glass, lens preform and optical element |
| CN102367197A (en) * | 2010-06-24 | 2012-03-07 | 株式会社小原 | Optical glass, preform product and optical element |
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| US10689289B2 (en) | 2015-11-11 | 2020-06-23 | Ohara Inc. | Optical glass, preform, and optical element |
| CN106915901A (en) * | 2015-12-25 | 2017-07-04 | 株式会社小原 | A kind of optical glass, prefabricated component and optical element |
| CN107445475A (en) * | 2016-06-24 | 2017-12-08 | 成都光明光电股份有限公司 | Optical glass, optical precast product and optical element |
| CN107445475B (en) * | 2016-06-24 | 2020-02-07 | 成都光明光电股份有限公司 | Optical glass, optical preform and optical element |
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| CN109592898B (en) * | 2017-10-02 | 2023-09-19 | 株式会社小原 | Optical glass, preform and optical element |
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| CN113165944A (en) * | 2018-11-26 | 2021-07-23 | 康宁股份有限公司 | Glass material with high refractive index |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104129918B (en) | 2021-10-22 |
| TWI616414B (en) | 2018-03-01 |
| TW201500312A (en) | 2015-01-01 |
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