CN104788017A - Optical glass and optical element - Google Patents

Optical glass and optical element Download PDF

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Publication number
CN104788017A
CN104788017A CN201410024911.8A CN201410024911A CN104788017A CN 104788017 A CN104788017 A CN 104788017A CN 201410024911 A CN201410024911 A CN 201410024911A CN 104788017 A CN104788017 A CN 104788017A
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Prior art keywords
glass
opticglass
content
optical
optical glass
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CN201410024911.8A
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CN104788017B (en
Inventor
毛露路
匡波
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CDGM Glass Co Ltd
Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics Co Ltd
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Priority to CN201410024911.8A priority Critical patent/CN104788017B/en
Priority to CN201710438267.2A priority patent/CN107129140B/en
Publication of CN104788017A publication Critical patent/CN104788017A/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

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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)
  • Glass Compositions (AREA)

Abstract

The invention provides an optical glass with the refractive index of 1.66-1.73 and the Abbe number of 48-53 and suitable for precision compression molding, and an optical element. The optical glass comprises 6-16wt% of SiO2, 22-40wt% of B2O3, 10-24wt% of La2O3, 20-30wt% of ZnO, 1-5wt% of Nb2O5, 1-4wt% of ZrO2 and 6-16wt% of CaO, and does not comprises Ta2O5, LiO2 or Ga2O3. The proportions of all components are reasonably arranged to make the Tg temperature of the optical glass in a range of 560-610DEG C, the density lower than 3.85g/cm<3> and the lambda 80 smaller than 375nm and the optical glass contain no Ta2O5, Ga2O3 or other precious raw materials. The optical glass is suitable for aspheric precision compression molding.

Description

Opticglass and optical element
Technical field
The present invention relates to a kind of opticglass, particularly relate to a kind of specific refractory power is 1.66-1.73, Abbe number is 48-53 opticglass and optical element.
Background technology
In recent years, along with the fast development of optical glass non-spherical surface technology, make the miniaturization of optical imaging system, lightweight becomes possibility.Aspherical lens can eliminate spherical aberration and the aberration of optical system simultaneously, obtains comparatively outstanding image quality.
The main method of current making aspherical lens is softened by opticglass in common die, is compressed to prefabricated component, and then prefabricated component is put into the mould with high-precision surface and again heat, and is compressed to aspherical lens.The surface accuracy of aspherical module is very high, and the finished surface quality suppressed is also very good, use of directly can installing.The advantage of this production method resides in reduced the operations such as follow-up processing, grinding, not only can be cost-saving, can reduce the discharge of the objectionable impurities such as lapping liquid, lapping powder, tackiness agent used in subsequent handling simultaneously.
Aspheric surface precise compression molding mould is owing at high temperature using, and its precision surface is easily oxidized in atmosphere and loses precision, and temperature is higher, and oxidation rate is faster.Costly, too short die life will increase substantially the manufacturing cost of aspherical lens to precise compression molding die manufacturing cost.So just require that the opticglass for the manufacture of aspherical lens has lower transition temperature (hereinafter referred to as Tg temperature), actual from production, if the Tg temperature of glass is lower than 610 DEG C, so will significantly extend die life.So Tg temperature is very important lower than the opticglass of 610 DEG C for aspheric surface die mould technology.
The camera lens (as slr camera camera lens) of current main flow is become by tens pieces of optical glass lens group usually.If the transmitance of each block optical glass lens is not high, so light will significantly be reduced by the optical throughput projecting photo-sensitive cell after tens pieces of eyeglasses, thus affects image quality.So contemporary optics technical requirement on design opticglass possesses the characteristic compared with high permeability.The important indicator weighing opticglass transmitance is degree of staining.Degree of staining adopts λ 80/ λ 5 to represent.Namely thickness of sample to be 10mm ± 0.1mm, λ 80 be glass transmittance reaches 80% time corresponding wavelength, λ 5 is the wavelength corresponding when reaching 5% of glass transmittance.For general imaging device, the numerical value of λ 80 is more low better.
CN99812067.7 discloses a kind of opticglass, containing Ta in its component 2o 5although this kind of oxide compound can improve the devitrification resistance energy of glass, and its price is expensive especially, meanwhile, the Li also containing 2.5-8% in its component 2o, Li 2o adds glass can reduce Tg temperature, but also makes glass devitrification resistance to decline simultaneously.
CN102674686A discloses a kind of opticglass, the SiO containing 21-25% in its component 2, 8-14% B 2o 3, 2-5% TiO 2.SiO 2content is higher, B 2o 3content is lower can raise smelting temperature, especially contains TiO in component 2when, the degree of staining of opticglass can raise.
CN99105396.6 discloses a kind of opticglass, the B containing 29-43.5% in its component 2o 3, 27-40% La 2o 3, 3.5-10% the TiO of ZnO, 0.1-3.5% 2, and the ZrO of 5-9% 2.B 2o 3content higher, its to the specific refractory power of glass and dispersion contribution will reduce, glass will reach higher specific refractory power certainly will be needed to add more La 2o 3contour refraction oxide compound, will increase cost like this.In addition, the content of ZnO is lower is unfavorable for the Tg temperature reducing glass.Especially the ZrO that more difficulty is melted is contained in component 2, the solvent temperature of glass can be improved, simultaneously at TiO 2when adding, the deterioration of glass coloring degree can be caused.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of specific refractory power is 1.66-1.73, Abbe number is 48-53 and be applicable to opticglass and the optical element of precise compression molding.
The technical scheme that technical solution problem of the present invention adopts is: opticglass, and its weight percent composition comprises: SiO 26-16%, B 2o 322-40%, La 2o 310-24%, ZnO20-30%, Nb 2o 51-5%, ZrO 21-4%, CaO6-16%, not containing Ta 2o 5, Li 2o and Ga 2o 3.
Further, also containing BaO0-10%, SrO0-6%, Sb 2o 30-0.1%.
Further, its weight percent consists of: SiO 26-16%, B 2o 322-40%, La 2o 310-24%, ZnO20-30%, Nb 2o 51-5%, ZrO 21-4%, CaO6-16%, BaO0-10%, SrO0-6%, Sb 2o 30-0.1%.
Further, wherein, SiO 27-11% and/or B 2o 326-38% and/or La 2o 312-22% and/or ZnO22-28% and/or Nb 2o 52-4% and/or ZrO 21.5-3.5% and/or CaO8-12%.
Further, described glass transformation temperature is 560 DEG C-610 DEG C.
Further, described glass λ 80 is less than 375nm.
Further, described glass refraction is 1.66-1.73, and Abbe number is 48-53.
Further, the density of described glass is less than 3.85g/cm3.
Adopt the gas preform that above-mentioned opticglass is made.
Adopt the optical element that above-mentioned opticglass is made.
The invention has the beneficial effects as follows: by the content of each component of reasonable arrangement, make the Tg temperature of opticglass of the present invention at 560 DEG C-610 DEG C, density is lower than 3.85g/cm3; λ 80 is less than 375nm, simultaneously not containing Ta 2o 5, Ga 2o 3etc. valuable raw material.Opticglass of the present invention is applicable to aspheric surface accurate die pressing die mould.
Embodiment
To describe each component of opticglass of the present invention below, except as otherwise noted, the content of each component represents with % by weight.
B 2o 3be a kind of Network former, play skeleton function in glass, if B in the present invention 2o 3content lower than 22%, so the chemical stability of glass and degree of staining can reduce; If its content is higher than 40%, so glass will not reach specific refractory power of the presently claimed invention and dispersion.So, the B in the present invention 2o 3content is defined as 22-40%, is preferably 26-38%.
SiO 2also be a kind of Network former, work as SiO 2when adding in borate glass, the high temperature viscosity of glass can be promoted, be conducive to glass ware forming, easily obtain estriate glass.In addition, SiO 2the chemical stability of glass can also be improved.In the present invention, if its content is lower than 6%, so it promotes the DeGrain of high temperature viscosity and chemical stability; If its content is higher than 16%, so will significantly promote the solvent temperature of glass, the Tg temperature of glass can be promoted simultaneously.Therefore, SiO 2content is defined as 6-16%, is preferably 7-11%.
ZnO can regulate specific refractory power and the Abbe number of glass, and can reduce the Tg temperature of glass.In addition, ZnO adds the specific refractory power and dispersion that can significantly improve glass in glass in a large number, can Substitute For Partial rare earth oxide.In the present invention, when ZnO content lower than 20% time, to the DeGrain reducing Tg temperature; But when its content is more than 30%, will chemical stability and the devitrification resistance energy of glass be reduced.Therefore, ZnO content is defined as 20-30%, is preferably 22-28%.
La 2o 3be a kind of rare-earth oxide, it has higher specific refractory power and lower dispersion, adds the specific refractory power and Abbe number that can significantly improve glass in glass to.Its content is defined as 10-24% in the present invention.Too high levels or the too low glass that all can not make reach design requirements, and its content is preferably 12-22%.
Nb 2o 5be a kind of metal oxide of high-refraction high-dispersion, be mainly used in the specific refractory power and the Abbe number that regulate glass.Its content is defined as 1-5% in the present invention.Too high levels or the too low glass that all can not make reach design requirements, and its content is preferably 2-4%.
ZrO 2the chemical stability of glass can be improved, simultaneously the also specific refractory power of adjustable glass and dispersion.In the present invention, if its content is lower than 1%, improve the DeGrain of chemical stability; If its content is higher than 4%, the solvent temperature of glass will be significantly improved.Therefore, its content is defined as 1-4%, is preferably 1.5-3.5%.
CaO, BaO and SrO in the present invention belong to alkaline earth metal oxide, add in glass to rise to regulate Glass optical constant and equilibrium composition to use.
CaO is the oxide compound that the present invention must add, if its content is lower than 6% in the present invention, does not reach the described effect of invention; If higher than 16%, the deterioration of glass devitrification resistance property can be caused.Therefore, its content is defined as 6-16%, is preferably 8-12%.
SrO content is in the present invention defined as 0-4%, does not preferably add.
BaO content is in the present invention defined as 0-10%, if addition is more than 10%, so glass density can significantly increase.Preferably do not add.
Sb 2o 3be a kind of finings, add in glass bubble is eliminated become and be more prone to.Its content is defined as 0-0.1% in the present invention, does not preferably add.
The performance of opticglass of the present invention will be described below:
Specific refractory power and Abbe number are tested according to " GB/T7962.1-2010 colouless optical glass testing method specific refractory power and abbe number ".Record high-refractive and high-dispersive optical glass specific refractory power (n of the present invention d) be 1.66-1.73, Abbe number (ν d) be 48-53.
Density is tested according to by " GB/T7962.20-2010 colouless optical glass testing method density measurement method ".Recording density of the present invention (ρ) is 3.85g/cm 3below.
Transition temperature (Tg) is by " GB/T7962.16-2010 colouless optical glass testing method " test.Record Tg temperature of the present invention to be between 560-610 DEG C.
Degree of staining adopts λ 80/ λ 5 to represent.Namely thickness of sample is 10mm ± 0.1mm, uses spectrophotometer measurement, wavelength corresponding when λ 80 refers to that glass transmittance reaches 80%, wavelength corresponding when λ 5 refers to that glass transmittance reaches 5%.
Through test, opticglass of the present invention has following performance: specific refractory power (nd) is 1.66-1.73, and Abbe number (vd) is 48-53, and density (ρ) is 3.85g/cm 3below, λ 80 is between 560-610 DEG C lower than 375nm, Tg temperature.
The present invention also provides a kind of opticglass prefabricated component and optical element, is formed according to method well known to those skilled in the art by above-mentioned opticglass.Because described opticglass has high refractive index and high dispersion, therefore described optical element also has high refractive index and high dispersion, can be applied to the equipment such as digital camera, digital camera, camera cell phone.
Embodiment
In order to understand technical scheme of the present invention further, the embodiment of opticglass of the present invention will be described now.It should be noted that, these embodiments do not limit the scope of the invention.
In table 1-table 2, the opticglass (embodiment 1 ~ 20) of display is by weighing and hybrid optical glass common raw material (as oxide compound, oxyhydroxide, carbonate, nitrate etc.) according to the ratio of each embodiment shown in table 1-table 2, mixing raw material is placed in platinum crucible, 2.5-4 hour is melted in 1320-1380 DEG C, and after clarification, stirring and homogenizing, obtain the homogeneous melt glass not having bubble and do not contain non-dissolved substance, also being annealed by this melten glass casting mold in mould forms.
The composition of embodiment of the present invention 1-20 is being shown to represent in 1-table 2 together with the result of specific refractory power (nd), Abbe number (vd), density (ρ), λ 80.In these tables, the composition of each component represents with % by weight.
Table 1
Table 2

Claims (10)

1. opticglass, is characterized in that, its weight percent composition comprises: SiO 26-16%, B 2o 322-40%, La 2o 310-24%, ZnO20-30%, Nb 2o 51-5%, ZrO 21-4%, CaO6-16%, not containing Ta 2o 5, Li 2o and Ga 2o 3.
2. opticglass as claimed in claim 1, is characterized in that, also containing BaO0-10%, SrO0-6%, Sb 2o 30-0.1%.
3. opticglass as claimed in claim 1, it is characterized in that, its weight percent consists of: SiO 26-16%, B 2o 322-40%, La 2o 310-24%, ZnO20-30%, Nb 2o 51-5%, ZrO 21-4%, CaO6-16%, BaO0-10%, SrO0-6%, Sb 2o 30-0.1%.
4. the opticglass as described in the arbitrary claim of claim 1,2,3, is characterized in that, wherein, and SiO 27-11% and/or B 2o 326-38% and/or La 2o 312-22% and/or ZnO22-28% and/or Nb 2o 52-4% and/or ZrO 21.5-3.5% and/or CaO8-12%.
5. the opticglass as described in the arbitrary claim of claim 1,2,3, it is characterized in that, described glass transformation temperature is 560 DEG C-610 DEG C.
6. the opticglass as described in the arbitrary claim of claim 1,2,3, it is characterized in that, described glass λ 80 is less than 375nm.
7. the opticglass as described in the arbitrary claim of claim 1,2,3, it is characterized in that, described glass refraction is 1.66-1.73, and Abbe number is 48-53.
8. the opticglass as described in the arbitrary claim of claim 1,2,3, it is characterized in that, the density of described glass is less than 3.85g/cm 3.
9. adopt the gas preform that the opticglass described in the arbitrary claim of claim 1-8 is made.
10. adopt the optical element that the opticglass described in the arbitrary claim of claim 1-8 is made.
CN201410024911.8A 2014-01-20 2014-01-20 Optical glass and optical element Active CN104788017B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11319243B2 (en) * 2018-01-17 2022-05-03 Corning Incorporated High refractive index optical borate glass
CN112028472B (en) * 2020-09-07 2022-04-15 成都光明光电股份有限公司 Optical glass, optical element and optical instrument

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0492834A (en) * 1990-08-02 1992-03-25 Sumita Kogaku Glass:Kk Optical glass for precise press
JPH10226533A (en) * 1997-02-10 1998-08-25 Nikon Corp Radiation shielding glass
CN1967287A (en) * 2005-11-16 2007-05-23 日本电气硝子株式会社 Optical glass for pressure forming
CN101058475A (en) * 2006-03-22 2007-10-24 Hoya株式会社 Optical glass, optical element and method of manufacturing thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0492834A (en) * 1990-08-02 1992-03-25 Sumita Kogaku Glass:Kk Optical glass for precise press
JPH10226533A (en) * 1997-02-10 1998-08-25 Nikon Corp Radiation shielding glass
CN1967287A (en) * 2005-11-16 2007-05-23 日本电气硝子株式会社 Optical glass for pressure forming
CN101058475A (en) * 2006-03-22 2007-10-24 Hoya株式会社 Optical glass, optical element and method of manufacturing thereof

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CN107129140B (en) 2020-09-29
CN104788017B (en) 2017-08-04

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