CN107473582A - Optical glass, gas preform and optical element - Google Patents

Optical glass, gas preform and optical element Download PDF

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Publication number
CN107473582A
CN107473582A CN201710873705.8A CN201710873705A CN107473582A CN 107473582 A CN107473582 A CN 107473582A CN 201710873705 A CN201710873705 A CN 201710873705A CN 107473582 A CN107473582 A CN 107473582A
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China
Prior art keywords
glass
optical glass
optical
content
temperature
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CN201710873705.8A
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Chinese (zh)
Inventor
匡波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CDGM Glass Co Ltd
Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics Co Ltd
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Priority to CN201710873705.8A priority Critical patent/CN107473582A/en
Publication of CN107473582A publication Critical patent/CN107473582A/en
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)

Abstract

The present invention provides a kind of inexpensive optical glass for precision profiling, and the optical glass does not contain Y2O3Component, density 4.3g/cm3Hereinafter, refractive index is 1.70~1.80, and Abbe number is 45~55, and transition temperature is less than 560 DEG C.The present invention is added without expensive Y by the content of reasonable arrangement each component2O3, production cost is reduced, has saved resource, while reduces the proportion of glass.The optical glass of the present invention is used suitable for precise compression molding.

Description

Optical glass, gas preform and optical element
The application is to be directed to Application No. 201210480414.X, and the applying date is on November 23rd, 2012, entitled " optics The divisional application of the application for a patent for invention of glass, gas preform and optical element ".
Technical field
The present invention relates to the accurate die pressing optical glass that a kind of refractive index is 1.70~1.80, Abbe number is 45~55, And the optical element made of the optical glass.
Background technology
The popularization of mobile phone with digital camera and with camera, using optical system equipment it is highly integrated Change, high performance rapidly promotes.Requirement to the high precision int of optical system, lightweight, miniaturization is also increasingly stronger, This requires optical material to have less proportion.High-performance to be realized and miniaturization, then need miniaturization, it is highly integrated and The optical element (such as optical lens) that can be used for high-performance in optical device.In these optical elements, non-spherical lens exists Play an important roll in optical design, because can be realized so far by using multiple spherical lenses ability using single non-spherical lens The aberration that can be realized is eliminated, and optical system integrated level can be made high, to reach this purpose, to height refraction, low dispersion Optical glass demand it is increasing.
In optical element forming method, accurate die pressing method turns into main flow, and the accurate die pressing of glass is in pressure, high temperature Under, glass preform is moulded with the mould with predetermined shape, acquisition has final products shape or very close with its shape Glass moldings.Using accurate die pressing method, the mechanograph with required shape can be mass produced with high productivity.By institute The pinpoint accuracy of the geometry needed, this drawing method must use advanced precision instrument, and therefore need costliness Mold materials, the life-span of this mould greatly influence the income of produced product.The high-time key factor of mould It is that operating temperature is low as far as possible, but it can only be reduced to and be pressed the viscosity of material and be still enough to be used in the journey of drawing method Degree.It means that between the processed transition temperature Tg of glass and the rentability of drawing method, there are it is direct because Fruit relation：The transition temperature of glass is lower, then the life-span of mould is longer, and income is higher.This allows for having low transformation temperature The demand of the optical glass of degree is increasing.
Japanese patent application 2002-249337 discloses the optics that refractive index is 1.72~1.83, Abbe number is 45~55 Glass, its transition temperature is higher, and proportion is larger, it is difficult to realizes economy and lightweight.Chinese patent application 200710006744.4 a kind of optical glass is disclosed, wherein containing a large amount of expensive Y2O3, glass cost is high, is unsuitable for Industrialization production, and its proportion is relatively large, is unsuitable for the use of lightweight optical system.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of inexpensive optical glass for precision profiling, the optics glass The density (ρ) of glass is 4.3g/cm3Hereinafter, refractive index (nd) is 1.70~1.80, and Abbe number (vd) is 45~55, transition temperature (Tg) it is less than 560 DEG C.
The technical proposal for solving the technical problem of the invention is：Optical glass, Y is not contained2O3Component, density are 4.3g/cm3Hereinafter, refractive index is 1.70~1.80, and Abbe number is 45~55, and transition temperature is less than 560 DEG C.
Further, its percentage by weight composition is：SiO2：1~10%, B2O3：21~34%, La2O3：20~32%, ZrO2：1~8%, ZnO：15~28%, Ta2O5：0~8%, Gd2O3：5~17%, CaO：0~5%, SrO：0~3%, Li2O: 0.1~3%, Na2O：0~1%.
Further, wherein：SiO2：2~7%.
Further, wherein：B2O3：25~30%, La2O3：22~30%.
Further, wherein：ZrO2：1~5%.
Further, wherein：ZnO：18~26%.
Further, wherein：Ta2O5：1~5%.
Further, wherein：Gd2O3：9~15%.
Optical glass, its percentage by weight composition are：SiO2：1~10%, B2O3：21~34%, La2O3：20~32%, ZrO2：1~8%, ZnO：15~28%, Ta2O5：0~8%, Gd2O3：5~17%, CaO：0~5%, SrO：0~3%, Li2O: 0.1~3%, Na2O：0~1%.
Further, wherein：SiO2：2~7%.
Further, wherein：B2O3：25~30%, La2O3：22~30%.
Further, wherein：ZrO2：1~5%.
Further, wherein：ZnO：18~26%.
Further, wherein：Ta2O5：1~5%.
Further, wherein：Gd2O3：9~15%.
Using gas preform made of above-mentioned optical glass.
Using optical element made of above-mentioned optical glass.
Using optical instrument made of above-mentioned optical glass.
The beneficial effects of the invention are as follows：The present invention is added without expensive by the content of reasonable arrangement each component Y2O3, production cost is reduced, has saved resource, while reduces the proportion of glass.The present invention optical glass density (ρ) be 4.3g/cm3Hereinafter, refractive index (nd) is 1.70~1.80, and Abbe number is 45~55, and transition temperature is less than 560 DEG C, is applied to Precise compression molding is used.
Embodiment
Each component of optical glass of the present invention is described below, unless otherwise indicated, the ratio of each component content is Represented with weight %.
SiO2It is the network generation oxide body to form glass, adds a certain amount of SiO2The high temperature viscosity of glass can be increased, Improve the devitrification resistance property of glass.SiO2Content more than 10% when, the meltability of optical glass reduces, softening temperature rise. Therefore SiO2Content be defined to 1~10%, preferably 2~7%.
As a kind of effective oxide for forming glass network structure, B2O3It is to obtain high refraction, the group of the lanthanides optics of low dispersion The necessary component of glass.B in the present invention2O3The meltbility of glass can be efficiently modified, reduces smelting temperature and viscous flow temperature.When B2O3When content is less than 21%, it is difficult to obtain the stable glass of property, devitrification resistance property is undesirable；But work as B2O3Content is higher than When 34%, the refractive index of glass does not reach design object, while the chemical stability of glass can reduce.Therefore, B2O3Content limit It is set to 21~34%, more preferably content is 25~30%.
La2O3It is high refraction, the main component of low-dispersion optical glass for mold, the refractive index and unobvious that can increase glass carry The dispersion of high glass, in inventive formulation system, B2O3With La2O3Combination exist, the resistance to mistake of glass can be effectively improved Permeability energy, improve the chemical stability of glass.Work as La2O3Content be less than 20% when, it is impossible to obtain the effect of the above；When it contains When amount is more than 32%, the crystallization property of glass deteriorates, therefore its content is defined into 20~32%, and preferred content is 22~ 30%.
Gd2O3With improve glass refractive index and chemical stability effect, particularly and La2O3In the presence of common, carry The devitrification resistance of high glass can become apparent from the effect of chemical stability.But if its content is excessive, turning for glass can be improved The difficulty of temperature, increase shaping prefabricated component and precise compression molding, therefore Gd2O3Content be defined to 5~17%, preferably 9~ 15%.
ZrO2Viscosity, hardness, elasticity, refractive index and the chemical stability of optical glass can be improved, and glass can be reduced Thermal coefficient of expansion.Work as ZrO2Content more than 8% when, will appear from crystallization, and reduce the devitrification resistance of glass.ZrO2 Content be 1~8%, preferred content be 1~5%.
ZnO is the important component to form low-melting point optical glass, can reduce the thermal coefficient of expansion and transition temperature of glass, Improve chemical stability, heat endurance and the refractive index of glass.When ZnO content is more than 28%, the increased devitrification resistance of optical glass Increase, dispersion significantly increase；When ZnO content is less than 15%, the transition temperature rise of optical glass.Therefore, ZnO content Preferably 15~28%, more preferably 18~26%.
Ta2O5Be to confer to the component of the high refraction of optical glass and low dispersion characteristics, can effective reinforcing glass high-temperature stable Property, but Ta2O5Content is high, glass cost and density increase.Therefore Ta2O5Content be preferably 0~8%, more preferably 1~ 5%.
CaO has improvement stability, glass, and the effect of melting sources is helped during melting production, but its content is higher than The tendency towards devitrification increase of glass when 5%, therefore CaO content is defined to 0~5%.
The effects of SrO in glass are similar to BaO, replace part BaO to accelerate the fusing and clarification of glass with SrO, drop The tendency towards devitrification of low glass, when its content is higher than 3%, found difficulty, thus SrO contents be defined to 0~3%, preferably 0~ 1%, more preferably it is added without.
Na2O can improve the melting behaviour of glass, but introduce the split-phase trend that can aggravate glass too much, therefore its is preferred Content is 0~1%.
Li2O can effectively reduce glass transformation temperature, be effectively improved the thawing ability of glass, reduce fusion temperature, simultaneously It can also effectively reduce glass density；But deteriorate the processing performance of glass as its content Gao Shihui, the devitrification resistance of glass and Chemical stability declines, so Li2O preferred content is 0.1~3%.
The performance of optical glass of the present invention is described below.
Density according to by《GB/T 7962.20-1987 colouless optical glass method of testing density measurement methods》Test.
Refractive index and Abbe number according to《The colouless optical glass method of testing refractive indexes of GB/T 7962.1-1987 and dispersion Coefficient》Test.
Transition temperature (Tg) according to《GB/T7962.16-1987 colouless optical glass method of testings linear expansion coefficient, transformation Temperature and sag temperature》Test, i.e.,：Sample is within the scope of certain temperature, and temperature often raises 1 DEG C, in sample On expansion curve, low-temperature region and high-temperature area straight line portion are extended into intersecting, the temperature corresponding to its intersection point.
By test, optical glass provided by the invention has following performance：Density (ρ) is 4.3g/cm3Below；Refraction Rate (nd) is 1.70~1.80, and Abbe number is 45~55, and transition temperature is less than 560 DEG C.
The present invention also provides a kind of optical element, by above-mentioned optical glass according to method shape well known to those skilled in the art Into.Because described optical glass has high index of refraction and relatively low glass transformation temperature, therefore the optical element also has High index of refraction and relatively low glass transformation temperature, can apply to the equipment such as digital camera, digital camera, camera cell phone.
Embodiment
In order to further appreciate that technical scheme, the embodiment of optical glass of the present invention is described below.Should It is noted that these embodiments do not limit the scope of the present invention.
The optical glass (embodiment 1~30) shown in 1~table of table 3 is by according to each embodiment shown in table 1~3 Ratio is weighed and hybrid optical glass common raw material (such as oxide, hydroxide, carbonate, nitrate and fluoride), will Mixed material is placed in platinum crucible, is melted in 1100~1300 DEG C of temperature, and through melt, clarify, stir and After homogenizing, no bubble and the homogeneous melt glass without undissolved material are obtained, casting mold is simultaneously in mould by this melten glass Annealing forms.
The composition of the embodiment of the present invention 1~30 and refractive index (nd), Abbe number (vd), density (ρ), glass transformation temperature (Tg) result represents in table 1~3 together.In these tables, the composition of each component is represented with weight %.
Table 1
Table 2
Table 3
From above-described embodiment as can be seen that the optical glass density (ρ) of the present invention is 4.3g/cm3Hereinafter, refractive index (nd) For 1.70~1.80, Abbe number is 45~55, and transition temperature is less than 560 DEG C, suitable for precise compression molding use.

Claims (11)

1. optical glass, it is characterised in that do not contain Y2O3Component, density 4.3g/cm3Hereinafter, refractive index be 1.70~ 1.80, Abbe number is 45~55, and transition temperature is less than 560 DEG C.
2. optical glass as claimed in claim 1, it is characterised in that it, which is formed, represents to contain by weight percentage：SiO2：1~ 10%th, B2O3：21~34%, La2O3：20~32%, ZrO2：1~8%, ZnO：15~28%, Gd2O3：5~17%, Li2O： 0.1~3%.
3. optical glass as claimed in claim 1 or 2, it is characterised in that its composition represents also to contain by weight percentage： Ta2O5：0~8%, CaO：0~5%, SrO：0~3%, Na2O：0~1%.
4. optical glass, it is characterised in that it, which is formed, represents to contain by weight percentage：SiO2：1~10%, B2O3：21~ 34%th, La2O3：20~32%, ZrO2：1~8%, ZnO：15~28%, Ta2O5：0~8%, Gd2O3：5~17%, CaO：0~ 5%th, SrO：0~3%, Li2O：0.1~3%, Na2O：0~1%.
5. optical glass, it is characterised in that its composition is expressed as by weight percentage：SiO2：1~10%, B2O3：21~34%, La2O3：20~32%, ZrO2：1~8%, ZnO：15~28%, Ta2O5：0~8%, Gd2O3：5~17%, CaO：0~5%, SrO：0~3%, Li2O：0.1~3%, Na2O：0~1%.
6. the optical glass as described in Claims 1 to 5 any claim, it is characterised in that wherein：SiO2：2~7%；With/ Or B2O3：25~30%；And/or La2O3：22~30%；And/or ZrO2：1~5%；And/or ZnO：18~26%；And/or Ta2O5：1~5%；And/or Gd2O3：9~15%.
7. the optical glass as described in claim 4 or 5, it is characterised in that glass refraction is 1.70~1.80, and Abbe number is 45~55.
8. the optical glass as described in claim 4 or 5, it is characterised in that glass density 4.3g/cm3Hereinafter, transition temperature For less than 560 DEG C.
9. using gas preform made of the optical glass described in any claim in claim 1~8.
10. optical element made of the optical glass as described in claim 1~8 any claim.
11. optical instrument made of the optical glass as described in claim 1~8 any claim.
CN201710873705.8A 2012-11-23 2012-11-23 Optical glass, gas preform and optical element Pending CN107473582A (en)

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CN201210480414XA CN102923952A (en) 2012-11-23 2012-11-23 Optical glass, glass prefabricated part and optical element
CN201710873705.8A CN107473582A (en) 2012-11-23 2012-11-23 Optical glass, gas preform and optical element

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6672472B2 (en) * 2016-03-07 2020-03-25 成都光明光▲電▼股▲分▼有限公司 Optical glass and optical element
CN109650716B (en) * 2019-01-22 2021-12-07 成都光明光电股份有限公司 Colorless optical glass and glass prefabricated member, element and instrument thereof

Citations (8)

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Publication number Priority date Publication date Assignee Title
JP2001072432A (en) * 1999-07-06 2001-03-21 Minolta Co Ltd Optical glass
JP2002128539A (en) * 2000-10-13 2002-05-09 Ohara Inc Low fluorescent optical glass
JP2003020249A (en) * 2001-07-03 2003-01-24 Ohara Inc Optical glass
CN1418836A (en) * 2001-10-24 2003-05-21 保谷株式会社 Optics glass, press-die fabricated body and optics assembly
JP2003201142A (en) * 2001-10-22 2003-07-15 Sumita Optical Glass Inc Optical glass for precision press forming
CN101386469A (en) * 2008-10-16 2009-03-18 成都光明光电股份有限公司 High refraction and low dispersion optical glass
WO2009072586A1 (en) * 2007-12-06 2009-06-11 Asahi Glass Co., Ltd. Optical glass, and preform for fine press molding and optical element each comprising the same
CN101935164A (en) * 2009-06-30 2011-01-05 株式会社小原 Optical glass, preforming material and optical element

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
JP3458461B2 (en) * 1994-07-07 2003-10-20 株式会社ニコン Optical glass
JP4924978B2 (en) * 2005-11-16 2012-04-25 日本電気硝子株式会社 Optical glass for mold press molding

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001072432A (en) * 1999-07-06 2001-03-21 Minolta Co Ltd Optical glass
JP2002128539A (en) * 2000-10-13 2002-05-09 Ohara Inc Low fluorescent optical glass
JP2003020249A (en) * 2001-07-03 2003-01-24 Ohara Inc Optical glass
JP2003201142A (en) * 2001-10-22 2003-07-15 Sumita Optical Glass Inc Optical glass for precision press forming
CN1418836A (en) * 2001-10-24 2003-05-21 保谷株式会社 Optics glass, press-die fabricated body and optics assembly
WO2009072586A1 (en) * 2007-12-06 2009-06-11 Asahi Glass Co., Ltd. Optical glass, and preform for fine press molding and optical element each comprising the same
CN101386469A (en) * 2008-10-16 2009-03-18 成都光明光电股份有限公司 High refraction and low dispersion optical glass
CN101935164A (en) * 2009-06-30 2011-01-05 株式会社小原 Optical glass, preforming material and optical element

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