CN1968904A - Optical glass and lens - Google Patents
Optical glass and lens Download PDFInfo
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- CN1968904A CN1968904A CN 200580020196 CN200580020196A CN1968904A CN 1968904 A CN1968904 A CN 1968904A CN 200580020196 CN200580020196 CN 200580020196 CN 200580020196 A CN200580020196 A CN 200580020196A CN 1968904 A CN1968904 A CN 1968904A
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Abstract
An optical glass exhibits a high transmittance and a high refractive index and it is reduced in the decrease of the strength of a transmitted light when the glass is continuously irradiated with a blue-violet laser diode light, and further, it is less prone to have a higher melting temperature and exhibits the chemical durability being not low. An optical glass which comprises, in mole %, 35 to 54 % of TeO<SUB>2</SUB>, 0 to 10 % of GeO<SUB>2</SUB>, 5 to 30 % of B<SUB>2</SUB>O<SUB>3</SUB>, 0 to 15 % of Ga<SUB>2</SUB>O<SUB>3</SUB>, 0 to 8 % of Bi<SUB>2</SUB>O<SUB>3</SUB>, 3 to 20 % of ZnO, 0 to 10 % of MgO + CaO + SrO + BaO, 1 to 10 % of Y<SUB>2</SUB>O<SUB>3 </SUB>+ La<SUB>2</SUB>O<SUB>3 </SUB>+ Gd<SUB>2</SUB>O<SUB>3</SUB>, 0 to 5 % of Ta<SUB>2</SUB>O<SUB>5 </SUB>+ Nb<SUB>2</SUB>O<SUB>5</SUB>, 0 to 1.8 % of TiO<SUB>2</SUB>, and 0 to 6 % of Li<SUB>2</SUB>O + Na<SUB>2</SUB>O + K<SUB>2</SUB>O + Rb<SUB>2</SUB>O + Cs<SUB>2</SUB>O; and a lens comprising the above optical glass.
Description
Technical field
The present invention relates to be suitable for the record of optical recording medias such as CD, CD-R, CD-RW, DVD, MO or read employed object lens, laser apparatus lens and opticglass with collimating lens etc.
Background technology
To the record of aforementioned optical recording media or from the reading of this medium, laser is become directional light through collimating lens, it is carried out optically focused with object lens carry out.Such collimation lens and object lens will carry out precision manufacturing after usually will being heated to softening point by the preformed articles that glass or resin form.
In recent years, in order to improve the recording density of optical recording media, propose to use the technical scheme of the bluish violet color laser (typical wavelength is 405nm) of wavelength 400～415nm, and disclosed lens and the opticglass (referring to patent documentation 1) that is suitable for this technical scheme.
Patent documentation 1: the Japanese Patent spy opens the 2004-43294 communique
The announcement of invention
Disclosed the also little optical glass of decline that sees through luminous intensity behind the light of wavelength 405nm of transmissivity and refractive index height and Continuous irradiation bluish-violet laser diode in the patent documentation 1.
But, in this optical glass, on these characteristics, all reach the glass of present desired level, exist melting temperature Gao Erhui to be difficult to realize using the extensive melting of gold crucible processed or the problem of the chemical durabilities possibility deteriorations such as resistance to water and weatherability.
The object of the present invention is to provide the opticglass and the lens that can address these problems.
The present invention is the invention that realizes above-mentioned purpose, has following main contents.
(1) optical glass is characterized in that, represents with the mole % of following oxide-base standard, in fact by 35～54% TeO
2, 0～10% GeO
2, 5～30% B
2O
3, 0～15% Ga
2O
3, 0～8% Bi
2O
3, 3～20% ZnO, 0～10% MgO+CaO+SrO+BaO, 1～10% Y
2O
3+ La
2O
3+ Gd
2O
3, 0～5% Ta
2O
5+ Nb
2O
5, 0～1.8% TiO
2, 0～6% Li
2O+Na
2O+K
2O+Rb
2O+Cs
2O forms.
(2) as above-mentioned (1) described opticglass, wherein, TeO
2+ GeO
2Be 40～60%.
(3) such as above-mentioned (1) or (2) described optical glass, wherein, contain TiO
2
(4) such as each described optical glass in above-mentioned (1)～(3), wherein, contain Bi
2O
3
(5) such as each described optical glass in above-mentioned (1)～(4), wherein, B
2O
3+ Ga
2O
3+ Bi
2O
3Be 15～35%.
(6) as each described opticglass in above-mentioned (1)～(5), wherein, ZnO+MgO+CaO+SrO+BaO is 5～30%.
(7) as each described opticglass in above-mentioned (1)～(6), wherein, the internal transmission factor at thickness 1mm place of light that for wavelength is 405nm is more than 90%, and for the specific refractory power of this light more than 1.92.
(8), wherein, be 6kW/m in energy density as each described opticglass in above-mentioned (1)～(7)
2Condition under illumination wavelength be that the minimizing ratio L of irradiation after 24 hours that sees through light intensity at thickness 1mm place of light time of 405nm is below 16%.
(9), wherein, can fuse below 980 ℃ as each described opticglass in above-mentioned (1)～(8).
(10) lens is characterized in that, are formed by each described opticglass in above-mentioned (1)～(9).
The ZnO content of optical glass of the present invention (being designated hereinafter simply as glass of the present invention) is little, so can reduce melting temperature, can realize stable extensive melting.In addition, even containing under the situation of alkalimetal oxide, because its content summation is below 6%, so also can alleviate misgivings to aforementioned chemical durability.
In addition, if lens of the present invention are used for aforementioned collimation lens and object lens, then bluish violet color laser is with employed near-infrared laser can Alternate all the time.
In addition, in its preferred form, when keeping high-transmission rate and refractive index, can suppress more significantly the aforementioned decline that sees through luminous intensity than the optical glass that discloses in the patent documentation 1.
The best mode that carries out an invention
Lens of the present invention are made by glass of the present invention being carried out for example press forming.That is, glass processing of the present invention is become preformed articles, heat then this preformed articles and make it softening, use mould to carry out press forming (so-called accurate compacting), thereby make lens.Aforementioned preformed articles can be with the glass direct forming of the present invention of molten state and is made.
Glass of the present invention better is can melt to make under the temperature below 980 ℃.If not, use the glass melting of gold crucible processed (fusing point: 1063 ℃) to be difficult to realize, and have to use platinum system or platinum alloy crucible processed to melt, the result can cause platinum to melt in the glass, and the transmissivity of glass is low.
Glass of the present invention better is more than 90% for the 1mm thickness conversion value (T) of the internal transmission factor of the light of wavelength 405nm.Less than 90% o'clock, can be difficult to as foregoing lens.Be more preferably more than 92%, particularly preferably more than 94%.
Aforementioned T for example measures as follows.
Is the 2 piece plate tensile samples of 1mm and 5mm through mirror ultrafinish, size for 2cm * 2cm, thickness to the two sides, uses the optical transmission rate of the corporate system spectrophotometer U-3500 of Hitachi (trade(brand)name) mensuration for wavelength 405nm.With the thickness of measuring gained is that the transmissivity of the plate tensile sample of 1mm, 5mm is remembered respectively and made T
1, T
5, calculate T (unit: %) by following formula.
T＝100×exp[(2/3)×log
e(T
5/T
1)]
Glass of the present invention better is more than 1.92 for the specific refractory power (n) of the light of wavelength 405nm.Less than 1.92 o'clock, (typical thickness was 1.5～3.5mm) and has object lens of required numerical aperture (being typically 0.65～0.85) to be difficult to obtain to be thinned to the record that can be used for optical recording media.Be more preferably more than 1.94, particularly preferably more than 1.97, preferably more than 1.99.N is generally below 2.1.
For glass of the present invention, be 6kW/m in energy density
2Condition under the irradiation bluish-violet laser diode light (wavelength: the thickness 1mm place in the time of 405nm) better be below 16% through the minimizing ratio L of irradiation after 24 hours of light intensity.Surpass at 16% o'clock, even T is 97% before the irradiation beginning, but after shining 24 hours, T also drops to less than 80%, for example is difficult to the object lens of lens of the present invention as the DVD that adopts bluish-violet laser diode light.
Even T is 95% before the irradiation beginning, also to make the T of irradiation after 24 hours in the situation more than 90%, L better is below 5%.In addition, even T is 93% before the irradiation beginning, also will make the T of irradiation after 24 hours in the situation more than 90%, L better is below 3%.
L for example measures as follows.That is be the plate tensile sample of 1mm through mirror ultrafinish, size for 1cm * 1cm, thickness to the two sides,, at 6kW/m
2Condition under the royal purple light (wavelength: 405nm) after 24 hours, see through light intensity I when using Ophir corporate system photorectifier PD-300UV (trade(brand)name) to measure irradiation just to have begun of the irradiation system bluish-violet laser diode NDHV310APC of Ri Ya chemical company (trade(brand)name)
0See through light intensity I with irradiation after 1 hour
1, calculate L (unit: %) by following formula.
L＝(I
0-I
1)×100/I
0
Below, mole % simply is denoted as %, the composition of glass of the present invention is described.
TeO
2For forming the glass skeleton and improving the composition of n, be essential.Less than 35% o'clock, vitrifying difficulty, perhaps n step-down.Better be more than 40%, be more preferably more than 44%.Surpass at 54% o'clock, it is big that L becomes.Better be below 52%, be typically below 48%.
GeO
2Optional, however be to form the glass skeleton, increase T, make stabilizationization and the composition of the devitrification when suppressing to be shaped, can contain 10% at most.When surpassing 10%, vitrification point (T
G) raise, the press forming temperature also uprises, and can shorten die life, perhaps can be difficult to below 980 ℃ glass is being melted.In the situation that melting temperature will be even lower, GeO
2Better be below 8%, be typically below 6%.Contain GeO
2Situation under, its content better is more than 2%.
TeO
2And GeO
2The summation TeO of content
2+ GeO
2Be preferably 40～60%.Less than 40% o'clock, can be difficult to vitrifying.Be more preferably more than 45%, particularly preferably more than 47%.When surpassing 60%, it is big that L can become.Be more preferably below 55%, particularly preferably below 53%.
B
2O
3For forming the composition of glass skeleton, be essential.Less than 5% o'clock, it is unstable that glass becomes.Better be more than 10%, be more preferably more than 15%.Surpass at 30% o'clock, the n step-down, perhaps chemical durability such as water tolerance is low.Be typically below 20%.
Ga
2O
3Optional, but in order to improve n or to increase hardness, can contain at most 15%.Surpass at 15% o'clock, it is unstable that glass can become.Better be below 10%, be typically below 8%.Contain Ga
2O
3Situation under, its content better is more than 4%.
Bi
2O
3Optional, but in order to improve n, can contain at most 8%.Surpass at 8% o'clock, the T step-down.
For example will make n in the situation more than 1.98, better be the Bi that contains more than 1%
2O
3Be more preferably more than 2%.
B
2O
3+ Ga
2O
3+ Bi
2O
3Be preferably 15～35%.Less than 15% o'clock, can be difficult to vitrifying.Be more preferably more than 20%, below 30%.Surpass at 35% o'clock, it is unstable that glass can become.
ZnO is the composition that makes stabilizationization, is essential.Less than 3% o'clock, it is unstable that glass becomes.Better be more than 10%.Surpass at 20% o'clock, can't reduce melting temperature (Tm).Better be below 19%.
MgO, CaO, SrO and BaO are optional, but make under the situation of stabilizationization, and total can contain 10% at most.When surpassing 10%, be difficult to vitrifying, melting temperature raises, perhaps T
GRaise.Better be below 5%.
ZnO+MgO+CaO+SrO+BaO is preferably 5～30%, and more preferably 10～25%.
Y
2O
3, La
2O
3And Gd
2O
3The composition of the devitrification when being shaped for inhibition must contain any more than a kind.Devitrification took place less than 1% o'clock in the content summation of these 3 kinds of compositions easily during shaping.Better be more than 2%.When surpassing 10%, be difficult to vitrifying, perhaps melting temperature raises.Better be below 8%.
Contain Y
2O
3Or La
2O
3Situation under, content better is respectively below 3%.When surpassing 3%, n can reduce.Be typically respectively below 1%.
Will further improve in the situation of n, better be to contain 1～5% Gd
2O
3
Ta
2O
5And Nb
2O
5All optional, in order to improve n, total can contain at most 5%.When surpassing 5%, devitrification takes place during shaping easily.Better be below 4%.
Improving in the situation of n and T, better is the Ta that contains more than 1%
2O
5
TiO
2Optional, but, can contain 1.8% at most in order to improve n or to reduce L.When surpassing 1.8%, T reduces.Better be below 1.5%.Reduce under the situation of L TiO
2Be preferably more than 0.3%.
Li
2O, Na
2O, K
2O, Rb
2O and Cs
2O is optional, but in order to make T
GOr melting temperature (Tm) decline, total can contain 6% at most.Surpass at 6% o'clock, chemical durability is low.Better be below 5%.Will further improve in the situation of chemical durability, aforementioned summation better is less than 1%, does not particularly preferably contain alkali metal oxide.
Making L in the situation below 9%, better is to make GeO
2More than 3.5% and Bi
2O
3Be 0～2.5%, perhaps make TiO
2Be 0.3～1.8%.
Glass of the present invention is formed by mentioned component in fact, but in the scope of not damaging purpose of the present invention, can contain other composition.Contain under the situation of such composition, the summation of these compositions better is below 10%, is more preferably below 5%.
Glass of the present invention better is not contain PbO, As
2O
3, Sb
2O
3And CdO, and frit also better is to use highly purified raw material, makes Fe
2O
3Content is illustrated in below 0.0001% with quality percentage.
Embodiment
In the example 1～14, according to the table from TeO
2To Na
2The composition that represents with mole % in the hurdle of O, the blending raw material, the blending raw material of preparation 450g added it in gold crucible processed of capacity 300cc, 950 ℃ of lower meltings 2.5 hours.At this moment, stirred 1 hour by gold agitator processed, melten glass is homogenized.The glass that has homogenized flows out in the carbon die, be configured as tabular after, progressively cool off.
In the example 15, with example 1～14 similarly be configured as tabular, but since devitrification remarkable, melt as follows.That is, prepare 100g blending raw material, join in the gold crucible processed of capacity 100cc, 995 ℃ of lower meltings 1 hour.At this moment, because melting temperature approaches the fusing point of gold, possibly can't keep its shape, therefore not adopt the stirring of gold agitator processed.The inadequate melten glass of homogenizing of obtaining is like this flowed out, be configured as tabular after, progressively cool off.
Example 1～13 is embodiment, and example 14,15 is comparative example.
As raw material, use the tellurium dioxide of purity more than 99.999% of emerging chemical industrial company system, boron oxide, the titanium oxide of the superfine of Northeast chemical company system, lanthanum trioxide, yttrium oxide, the gadolinium sesquioxide of the purity 99.9% of chemical industrial company of SHIN-ETSU HANTOTAI system, zinc oxide more than 99.999% of the gallium oxide of the superfine of レ ア メ Le corporate system, the purity of high-purity chemical institute corporate system, with germanium oxide more than 99.995% of the purity of corporate system, with purity tantalum oxide more than 99.9% of corporate system etc.
For the glass that obtains, measure T
G(unit: ℃), T (unit: %), n, L (unit: %), the refractive index n of d line
dWith Abbe number ν
dT
G, n, n
d, ν
dAssay method as described below.
T
G: 150mg is processed into pulverous sample is filled in the platinum ware, measure by its イ コ one イ Application ス Star Le メ Application Star corporate system apparatus for thermal analysis TG/DTA6300 (trade name).
N, n
d, ν
d: Yi Bian it is the Tp of 30mm, thick 10mm that glass processing is become, and measures by the カ Le ニ ユ one accurate spectrometer GMR-1 of Optical Co., Ltd's system (trade(brand)name).For example 15, n, n
dAnd ν
dAll do not measure, but n disclosed by to the specific refractory power (=1.92) of the light of wavelength 633nm based on forming the value of inferring.
In addition, for example 1,10,13,15,, water tolerance RW and acid resistance RA are estimated as follows according to the evaluation method that Japanese optics nitre industry can be formulated.Grade is shown in the corresponding hurdle of table.
RW:, be determined at the quality of flooding after 1 hour in the pure water of 100 ℃ of 80ml and reduce ratio (%) to the glass grain of diameter 420～600 μ m.Quality is judged to grade 1 when reducing ratio less than 0.05 (%), 0.05 it is above, be judged to grade 2 during less than 0.10 (%), 0.10 it is above, be judged to grade 3 during less than 0.25 (%), 0.25 it is above, be judged to class 4 during less than 0.60 (%), 0.60 above, be judged to class 5 during less than 1.10 (%), 1.10 (%) are judged to class 6 when above.
RA:, be determined at the quality of flooding after 1 hour in the 0.01 normal aqueous nitric acid of 100 ℃ of 80ml and reduce ratio (%) to the glass grain of diameter 420～600 μ m.Quality is judged to grade 1 when reducing ratio less than 0.20 (%), 0.20 it is above, be judged to grade 2 during less than 0.35 (%), 0.35 it is above, be judged to grade 3 during less than 0.65 (%), 0.65 it is above, be judged to class 4 during less than 1.20 (%), 1.20 above, be judged to class 5 during less than 2.20 (%), 2.20 (%) are judged to class 6 when above.
[table 1]
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| TeO 2 | 51.0 | 51.0 | 47.0 | 46.8 | 46.0 | 45.0 | 46.0 |
| GeO 2 | 0 | 4.0 | 3.0 | 3.0 | 3.0 | 5.0 | 5.0 |
| B 2O 3 | 29.0 | 19.0 | 19.0 | 19.0 | 19.0 | 19.0 | 19.0 |
| Ga 2O 3 | 0 | 5.0 | 5.0 | 5.0 | 5.0 | 6.0 | 6.0 |
| Bi 2O 3 | 0 | 0 | 5.0 | 5.0 | 5.0 | 4.0 | 3.0 |
| ZnO | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 |
| Y 2O 3 | 2.0 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| La 2O 3 | 2.0 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Gd 2O 3 | 1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 |
| Ta 2O 5 | 0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| TiO 2 | 0 | 0 | 0 | 0.2 | 1.0 | 0 | 0 |
| Na 2O | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| T G | 420 | 430 | 430 | 430 | 435 | 440 | 440 |
| T | 99 | 99 | 96.7 | 95.9 | 91.3 | 98.4 | 99.0 |
| L | 9.4 | 6.0 | 12.1 | 12.2 | 4.1 | 12.0 | 10.0 |
| n | 1.948 | 1.972 | 2.034 | 2.034 | 2.038 | 2.008 | 1.997 |
| n d | 1.886 | 1.909 | 1.958 | 1.958 | 1.961 | 1.937 | 1.928 |
| ν d | 26.9 | 26.4 | 23.8 | 23.9 | 23.7 | 24.8 | 25.3 |
| RW | 1 | ||||||
| RA | 2 |
[table 2]
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| TeO 2 | 47.0 | 45.2 | 45.0 | 44.8 | 44.6 | 45.0 | 45.0 | 54.0 |
| GeO 2 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 3.0 | 5.0 |
| B 2O 3 | 19.0 | 19.0 | 19.0 | 19.0 | 19.0 | 18.0 | 19.0 | 0 |
| Ga 2O 3 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.0 | 0 |
| Bi 2O 3 | 2.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 5.0 | 0 |
| ZnO | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 15.0 | 30.0 |
| Y 2O 3 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 3.0 |
| La 2O 3 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0 |
| Gd 2O 3 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 0 |
| Ta 2O 5 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 3.0 | 2.0 | 0 |
| TiO 2 | 0 | 0.8 | 1.0 | 1.2 | 1.4 | 1.0 | 2.0 | 0 |
| Na 2O | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.0 |
| T G | 440 | 440 | 440 | 440 | 450 | 445 | 445 | 335 |
| T | 98.7 | 94.2 | 94.9 | 93.6 | 93.0 | 95.2 | 86.6 | 98.0 |
| L | 9.5 | 2.5 | 1.9 | 1.6 | 1.6 | 1.9 | 2.4 | 10.8 |
| n | 1.986 | 2.001 | 2.001 | 2.001 | 2.002 | 2.011 | 2.041 | 2.01 |
| n d | 1.920 | 1.931 | 1.932 | 1.930 | 1.931 | 1.940 | 1.963 | |
| ν d | 25.7 | 25.1 | 25.1 | 25.3 | 25.3 | 24.8 | 23.5 | |
| RW | 1 | 1 | 3 | |||||
| RA | 1 | 1 | 3 |
The possibility of utilizing on the industry
The lens that formed by optical glass of the present invention are suitable for the record of the optical recording medias such as CD, CD-R, CD-RW, DVD, MO or read employed object lens, laser instrument with collimation lens etc.
Particularly, even lens of the present invention shine the light of bluish-violet laser diode for a long time, the minimizing ratio that sees through luminous intensity is also little, is suitable as the object lens of the DVD that adopts bluish-violet laser diode light.
Lens of the present invention can be used for collimation lens and object lens, also can be used for requiring bluish violet color laser and the field of the Alternate of employed near-infrared laser all the time.
Quote the full content of Japanese patent application 2004-186226 number of filing an application on June 24th, 2004 and Japanese patent application 2004-233408 number the specification sheets of filing an application on August 10th, 2004, claims, drawing and description summary here, adopt as the announcement of specification sheets of the present invention.
Claims (10)
1. optical glass is characterized in that, represents with the mole % of following oxide-base standard, in fact by 35～54% TeO
2, 0～10% GeO
2, 5～30% B
2O
3, 0～15% Ga
2O
3, 0～8% Bi
2O
3, 3～20% ZnO, 0～10% MgO+CaO+SrO+BaO, 1～10% Y
2O
3+ La
2O
3+ Gd
2O
3, 0～5% Ta
2O
5+ Nb
2O
5, 0～1.8% TiO
2, 0～6% Li
2O+Na
2O+K
2O+Rb
2O+Cs
2O forms.
2. opticglass as claimed in claim 1, wherein, TeO
2+ GeO
2Be 40～60%.
3. optical glass as claimed in claim 1 or 2 wherein, contains TiO
2
4. such as each described optical glass in the claim 1～3, wherein, contain Bi
2O
3
5. such as each described optical glass in the claim 1～4, wherein, B
2O
3+ Ga
2O
3+ Bi
2O
3Be 15～35%.
6. as each described opticglass in the claim 1～5, wherein, ZnO+MgO+CaO+SrO+BaO is 5～30%.
7. as each described opticglass in the claim 1～6, wherein, the internal transmission factor at thickness 1mm place of light that for wavelength is 405nm is more than 90%, and for the specific refractory power of this light more than 1.92.
8. as each described opticglass in the claim 1～7, wherein, be 6kW/m in energy density
2Condition under illumination wavelength be that the minimizing ratio L of irradiation after 24 hours that sees through light intensity at thickness 1mm place of light time of 405nm is below 16%.
9. such as each described optical glass in the claim 1～8, wherein, can melt below 980 ℃.
10. lens is characterized in that, are formed by each described opticglass in the claim 1～9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP186226/2004 | 2004-06-24 | ||
| JP2004186226 | 2004-06-24 | ||
| JP233408/2004 | 2004-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1968904A true CN1968904A (en) | 2007-05-23 |
Family
ID=38077101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580020196 Pending CN1968904A (en) | 2004-06-24 | 2005-06-23 | Optical glass and lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1968904A (en) |
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2005
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| CN101823839A (en) * | 2009-03-06 | 2010-09-08 | 肖特公开股份有限公司 | Opticglass |
| CN101823839B (en) * | 2009-03-06 | 2013-05-29 | 肖特公开股份有限公司 | Optical glass |
| CN102414137A (en) * | 2009-04-28 | 2012-04-11 | 株式会社小原 | Optical glass, optical element, and preform for precision press molding |
| CN102414138A (en) * | 2009-04-30 | 2012-04-11 | 株式会社小原 | Optical glass |
| CN102414138B (en) * | 2009-04-30 | 2015-07-22 | 株式会社小原 | Optical glass |
| CN106573824A (en) * | 2014-08-11 | 2017-04-19 | 日本电气硝子株式会社 | Infrared-transmitting glass |
| US10466098B2 (en) | 2014-08-11 | 2019-11-05 | Nippon Electric Glass Co., Ltd. | Infrared-transmitting glass |
| US11319243B2 (en) | 2018-01-17 | 2022-05-03 | Corning Incorporated | High refractive index optical borate glass |
| CN111683908A (en) * | 2018-01-31 | 2020-09-18 | Ａｇｃ株式会社 | Optical glass and optical member |
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