CN107140825A - Optical glass - Google Patents

Optical glass Download PDF

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Publication number
CN107140825A
CN107140825A CN201710556615.6A CN201710556615A CN107140825A CN 107140825 A CN107140825 A CN 107140825A CN 201710556615 A CN201710556615 A CN 201710556615A CN 107140825 A CN107140825 A CN 107140825A
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Prior art keywords
glass
optical
sio
sro
optical glass
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赖德光
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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 CN201710556615.6A priority Critical patent/CN107140825A/en
Publication of CN107140825A publication Critical patent/CN107140825A/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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • 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)
  • Physics & Mathematics (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)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)

Abstract

The present invention provides a kind of cost of material relatively low environmental protection optical glass.Optical glass, its refractive index is 1.63 1.70, and Abbe number is 45 50, and composition is represented by weight percentage, is contained：SiO2+B2O3：30 50%, and SrO/La2O3：0.5 6, SrO ＞ Al2O3.The present invention is using based on borosilicate system, the chemical stability of glass is improved, expensive raw material components are not contained, it is 1.63 1.70 to obtain refractive index, Abbe number is 45 50 optical glass, and optical precast product, optical element and the optical instrument being made up of the optical glass.

Description

Optical glass
Technical field
The present invention relates to a kind of optical glass, especially a kind of refractive index (nd) is 1.63-1.70, and Abbe number (vd) is 45-50 optical glass and the optical precast product being made up of the optical glass, optical element and optical instrument.
Background technology
In recent years, refractive index (nd) is that the optical glass that 1.63-1.70, Abbe number (vd) are 45-50 is widely used in In imaging, projection, telecommunication, optical communication engineering and laser technology application field, and optical element increasingly tends to be small-sized Change, lightweight.As environmental protection is paid attention to by global, PbO, As during production, processing and the use of glass2O3、 CdO etc. is poisonous, harmful components glass is used by limitation, but such optical glass that in the market occurs still suffers from a variety of ask Topic.
CN103717542A discloses a kind of and the close optical glass containing rare earth of above-mentioned optical constant scope, the glass Contain Nb in glass2O5、Ta2O5、Bi2O3、GeO2Deng expensive composition, cause glass price higher.In former document, such glass Glass is mostly used based on borate system, then adds a certain amount of rare earth oxide, alkali metal oxide and alkaline earth gold Belong to oxide.As B in such glass system2O3When content is larger, chemical stability is deteriorated.Optics disclosed in CN101389574A B containing 30-40% in glass2O3, its chemical stability is poor, and especially water resistance is poor；Simultaneously because it contains 15- 25% Gd2O3, cause the cost increase of glass.JP8048538A discloses a kind of optical glass, and it contains 6-35%'s Nb2O5, while the also fluoride containing 0.1-10%, this not only adds cost of material, while in actual production process, meeting Discharge fluoride gas and dust, increase carrying capacity of environment and processing cost.
The content of the invention
The technical problems to be solved by the invention are to provide that a kind of cost of material is relatively low, the refractive index with 1.63-1.70, The environmental protection optical glass of 45-50 Abbe number.
The present invention also provides a kind of optical precast product formed by above-mentioned optical glass and optical element and optical instrument.
The technical proposal for solving the technical problem of the invention is：Optical glass, its refractive index be 1.63-1.70, Ah Shellfish number is 45-50, and composition is represented by weight percentage, is contained：SiO2+B2O3：30-50%, and SrO/La2O3：0.5-6, SrO ＞ Al2O3。
Further, its composition is represented by weight percentage, is contained：SiO2：26-45%；B2O3：1-9%；La2O3：1- 9%；ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%；BaO：23-40%；Al2O3：0-8%.
Optical glass, its composition is represented by weight percentage, is contained：SiO2：26-45%；B2O3：1-9%；La2O3：0- 9%；ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%；BaO：23-40%；Al2O3：0-8%；Wherein SrO ＞ Al2O3。
Further, ZrO is also contained2：0-10%；Na2O：0-10%；K2O：0-10%；Sb2O3：0-1%.
Optical glass, its composition is expressed as by weight percentage：SiO2：26-45%；B2O3：1-9%；La2O3：0-9%； ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%；BaO：23-40%；Al2O3：0-8%；ZrO2：0- 10%；Na2O：0-10%；K2O：0-10%；Sb2O3：0-1%.
Further, wherein：SiO2：28-40%；And/or B2O3：1-7%；And/or La2O3：1-7%；And/or ZnO：8- 18%；And/or TiO2：1-8%；And/or CaO：5-13%；And/or SrO：2-9%；And/or BaO：25-38%；And/or Al2O3：More than 0-6%；And/or ZrO2：0-8%；And/or Na2O：0-8%；And/or K2O：0-8%；And/or Sb2O3：0- 0.5%.
Further, wherein：SiO2：30-38%；And/or B2O3：1-6%；And/or La2O3：1-6%；And/or ZnO：9- 15%；And/or TiO2：2-6%；And/or CaO：6-12%；And/or SrO：3-8%；And/or BaO：25-35%；And/or Al2O3：1-5%；And/or ZrO2：0-5%；And/or Na2O：0-5%；And/or K2O：0-5%.
Further, Li is not contained2O, PbO and/or P2O5And/or F.
Further, the content of each component meets one or more of following 6 kinds of situations：
1)SiO2+B2O3：30-50%；
2)SrO/La2O3：0.5-6；
3)La2O3/(TiO2+ZrO2)：0.1-5；
4)ZnO/(CaO+SrO+BaO)：0.1-0.6；
5)SiO2/(B2O3+Al2O3)：3-15；
6)(SiO2+TiO2)/(ZnO+B2O3)：1-6.
Further, the content of each component meets one or more of following 6 kinds of situations：
1)SiO2+B2O3：33-48%；
2)SrO/La2O3：0.8-5；
3)La2O3/(TiO2+ZrO2)：0.2-3；
4)ZnO/(CaO+SrO+BaO)：0.1-0.5；
5)SiO2/(B2O3+Al2O3)：4-10；
6)(SiO2+TiO2)/(ZnO+B2O3)：1.5-5.
Further, the content of each component meets one or more of following 6 kinds of situations：
1)SiO2+B2O3：35-45%；
2)SrO/La2O3：1-3；
3)La2O3/(TiO2+ZrO2)：0.3-2；
4)ZnO/(CaO+SrO+BaO)：0.15-0.4；
5)SiO2/(B2O3+Al2O3)：4-8；
6)(SiO2+TiO2)/(ZnO+B2O3)：2-4.
Further, the refractive index of glass is 1.63-1.70, and Abbe number is 45-50.
Further, the crystallization ceiling temperature of glass is less than 1040 DEG C, powder method water-resistant stability (DW) for 2 classes with On.
Optical precast product, is made of above-mentioned optical glass.
Optical element, is made of above-mentioned optical glass.
Optical instrument, is made of above-mentioned optical element.
The beneficial effects of the invention are as follows：Based on borosilicate system, the chemical stability of glass is improved, no Containing expensive raw material components, refractive index is obtained for 1.63-1.70, and Abbe number is 45-50 optical glass, Yi Jiyou Optical precast product, optical element and optical instrument that the optical glass is made.
Embodiment
Ith, optical glass
Optical glass of the present invention is based on considering that reduction does not contain even containing expensive component to reduction production cost Amount, obtains refractive index (nd) for 1.63-1.70, and Abbe number (vd) is the excellent optical glass of 45-50 chemical stability.
The composition of the optical glass of the present invention is described in detail below, the content of each glass ingredient, total content do not have such as There is special instruction, be then all indicated using percentage by weight.In addition, in the following description, mentioning below setting or advising When more than definite value, also including the setting.
[necessary component and optional Component]
SiO2It is glass former oxide, the viscosity of glass can be increased and devitrification resistance and weatherability is improved, when it contains When amount is less than 26%, the chemical durability of glass deteriorates；If its content is more than 45%, the optics being difficult to needed for maintaining target is normal Count, and strain optical coefficient can increase, and 40% is preferably limited to thereon, 38% is more preferably limited to thereon.It is special in order to obtain chemical durability Not excellent glass, preferably makes SiO2Content reach more than 28%, more preferably more than 30%.
A small amount of B is added in the present invention2O3, the meltbility of glass can be increased, preferably its content is more than 1%.Work as B2O3Contain When amount is more than 9%, the chemical stability of glass is deteriorated, and devitrification resistance deteriorates, therefore, B in optical glass of the present invention2O3Contain Measure as 1-9%, more preferably preferably 1-7%, 1-6%.
Glass of the present invention is by by SiO2And B2O3Total content SiO2+B2O3Control can be such that glass is not breaking in 30-50% In the case of bad meltbility, the structural compactness of glass is improved, and then improve the hardness and weatherability of glass, preferably SiO2+B2O3 Content be 33-48%, more preferably 35-45%.
The present invention is preferably introduced into a certain amount of La2O3, the devitrification resistance property of glass can be effectively improved, and improve glass Chemical stability, while being conducive to the refractive index for adjusting glass to desired scope.Work as La2O3When content is more than 9%, glass Crystallization property be deteriorated, therefore, the present invention in La2O3Content be defined to 0-9%, more preferably preferably 1-9%, 1- 7%, it is still more preferably 1-6%.
ZnO is added in system glass of the present invention, can adjust refractive index and the dispersion of glass, improves the devitrification resistance of glass Can, lift the stability of glass.ZnO can also reduce the high temperature viscosity of glass so that glass can melting at a lower temperature, So as to improve the transmitance of glass.But if ZnO additions are excessive, the devitrification resistance of glass be able to can decline, while high temperature Viscosity is smaller, and difficulty is brought to shaping.In glass system of the present invention, if ZnO content is less than 5%, reduction high temperature viscosity Performance is not obvious；If its content is higher than 20%, the devitrification resistance of glass be able to can decline, and high temperature viscosity does not reach design requirement.Cause This, ZnO content lower limit is 5%, and preferred lower limit is 8%, and further preferred lower limit is 9%；ZnO upper content limit is limited For 20%, preferred upper limit is 18%, more preferably 15%.
TiO2It is a kind of high-refraction high-dispersion oxide, refractive index and the dispersion of glass can be improved by adding in glass.Together When, proper amount of TiO2It is added in glass, can enter glass network turns into a part for glass network, increases stabilization Property, especially devitrification resistance energy.If excessive TiO2Add in glass, be that the refractive index of glass and dispersion can be higher than designs first It is expected that, its subvitreous transmitance can drastically deteriorate, the third is the stability of glass does not reach expected design.If TiO2It is very few, The devitrification resistance of glass be able to can decline.Therefore, TiO2Content be set to 1-10%, more preferably preferably 1-8%, 2- 6%.
The present inventor has found by lot of experiments, by making (SiO2+TiO2)/(ZnO+B2O3) value 1-6 it Between, the optical transmittance and devitrification resistance energy of glass, preferably (SiO can be improved2+TiO2)/(ZnO+B2O3) it is 1.5-5, more preferably For 2-4.
CaO is the necessary component of the present invention, by introducing more than 3% CaO, can improve the chemical stability of glass, carry The water-resistant stability of high glass, and reduce the density of glass；But when its content is more than 15%, the chemical stability of glass is on the contrary Deteriorate, and optical transmittance declines, therefore CaO content is 3-15%, more preferably preferably 5-13%, 6-12%.
SrO is also the necessary component of optical glass of the present invention, by introducing more than 1% SrO in the present invention, can improve glass The meltbility of glass, reduces the liquidus temperature of glass, when its content is more than 10%, the devitrification resistance of glass can deteriorate, therefore SrO Content be defined to 1-10%, more preferably preferably 2-9%, 3-8%.
In optical glass of the present invention, by preferably making SrO/La2O3Value in the range of 0.5-6, radiation source can be suppressed When glass optical transmittance recovery capability reduction, more preferably its ratio be 0.8-5, more preferably 1-3.
BaO can effectively reduce the strain optical coefficient of glass, and adjust the refractive index and Abbe number of glass, by add 23% with On BaO, light transmittance and stability of the glass in melting process, if its content is more than 40%, the resistance to mistake of glass can be improved Permeability deteriorates, while erosion of the aggravation to refractory material and crucible.Therefore BaO content is 23-40% in the present invention, is preferably contained Measure as 25-38%, further preferred content is 25-35%.
By making the value of ZnO/ (CaO+SrO+BaO) in glass of the present invention control in the range of 0.1-0.6, glass can be improved High temperature viscosity and devitrification resistance energy, can be further especially when ZnO/ (CaO+SrO+BaO) value is in the range of 0.1-0.5 Be conducive to the increase for improving simultaneously repression of swelling coefficient of chemical stability, more preferably 0.15-0.4.
It is a small amount of to introduce Al2O3The stability and chemical stability for forming glass can be improved, when especially its content is more than 1%, The hardness of glass can be improved；But when its content is more than 8%, display glass melting is deteriorated, devitrification resistance reduction, therefore the present invention Al2O3Content be 0-8%, more preferably preferably greater than 0-6%, 1-5%.In the present invention, by the content for preferably making SrO More than Al2O3Content, i.e. SrO ＞ Al2O3, the meltbility of glass can be effectively improved, the optical transmittance of glass is improved.
In optical glass of the present invention, preferably make SiO2/(B2O3+Al2O3) value be 3-15, the stable into glass of glass can be improved Property and chemical stability, corrosion of the reduction glass to refractory material, improve transmitance, further preferred SiO2/(B2O3+Al2O3) Value be 4-10, be still more preferably 4-8.
ZrO2It is a kind of high refractive low dispersive oxide, the refractive index of glass can be lifted in glass and adjust color by adding Dissipate.Meanwhile, proper amount of ZrO2Add in glass, the devitrification resistance energy of glass can be lifted and into glass stability.In the present invention If in its content be higher than 10%, glass can become to be difficult to melt, and smelting temperature can rise, and be easily caused inside glass and be mingled with Thing and its transmitance decline.Therefore, ZrO2Content is set to 0-10%, more preferably preferably 0-8%, 0-5%.
In optical glass of the present invention, preferably make La2O3/(TiO2+ZrO2) value be 0.1-5, beneficial to optical constant adjust To desired scope, and obtain excellent optical transmittance, more preferably La2O3/(TiO2+ZrO2) it is 0.2-3, further preferably For 0.3-2.
Na2O and K2O can reduce glass transition temperature, improve the meltbility of glass, be any group of optical glass of the present invention Point, when its content is respectively greater than 10%, the durability of glass can be damaged and increase the expansion of glass, therefore Na in the present invention2O And K2O content is defined to less than 10%, preferably less than 8%, more preferably less than 5% respectively.Due in the present invention Contain substantial amounts of SiO2, K2O introducing can increase the linear expansion coefficient of glass, therefore be preferably introduced into alkali metal Na2O。Li2O Even if a small amount of introducing, the crystallization property of glass of the present invention can also deteriorated, glass devitrification, and Li is caused2O introducing is also unfavorable Preferably Li is not contained in the control of cost of material, therefore glass of the present invention2O compositions.
By adding Sb on a small quantity2O3Component can improve the clarifying effect of glass, but work as Sb2O3When content is more than 1%, glass Glass has the tendency of Clarification Performance reduction, simultaneously because its strong oxidation promotes the deterioration of mould, therefore the present invention Sb2O3Addition be 0-1%, it is excellent to select 0-0.5%.
[component that should not contain]
Do not damage the present invention glass performance in the range of, can add as needed it is above-mentioned do not referred to other into Point.But the transiting metal component such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, even if individually or compoundly contain on a small quantity In the case of, glass is also subject to coloration, and the specific wavelength in visible region produces absorption, so that the raising for weakening the present invention can The property of light transmission rate effect is seen, therefore it is desirable, especially for the optical glass that the transmitance of visible region wavelength is required, excellent Choosing does not include actually.P2O5Introducing can reduce the chemical stability of glass, therefore preferably do not contain P in the present invention2O5.Fluorine Being introduced into actual production process for compound, can discharge fluoride gas and dust, increase carrying capacity of environment and processing cost, this hair Preferably F is not contained in bright glass.
Pb, Th, Cd, Tl, Os, Be and Se cation, have control to use as harmful chemical substance in recent years Tendency, not only in the manufacturing process of glass, until the measure in disposal after manufacturing procedure and commercialization to environmental protection It is required.Therefore, in the case where paying attention to the influence to environment, in addition to being inevitably mixed into, preferably actually not Contain them.Thus, optical glass becomes not including the material of pollution environment actually.Therefore, even if not taking special ring Measure in the countermeasure of border, optical glass of the invention also can be manufactured, processed and discarded.
Below, the performance to the optical glass of the present invention is illustrated.
[optical constant of optical glass]
The optical glass of the present invention is medium refractive index low dispersion, the lens that medium refractive index low dispersion is made The lens being made more with high index of refraction high-dispersion glass are combined, for chromatic aberration correction.The optical glass of the present invention is suitable from assigning From the point of view of the optical characteristics of its purposes, the scope of glass refraction (nd) is 1.63-1.70, and scope preferably is 1.65-1.69；Abbe number (the ν of glass of the present inventiond) scope be 45-50, preferred scope is 46-49.
[crystallization property of optical glass]
The crystallization property of glass is determined using temperature gradient furnace method, glass is made to 180*10*10mm sample, side is polished, It is put into the stove inside holding with thermograde to take out after 4 hours, under the microscope sight glass crystallization situation, crystal occurs in glass Corresponding maximum temperature is the crystallization ceiling temperature of glass.The crystallization ceiling temperature of optical glass of the present invention be 1040 DEG C with Under, preferably less than 1035 DEG C, more preferably less than 1030 DEG C.
[water-resistant stability of optical glass]
Powder method is water-fast to act on stability (DW) testing standard is as follows：
According to GB/T17129-1997 method of testing, calculated according to following formula and leach percentage
DW=(B-C)/(B-A) × 100%
Wherein：
DW- glass leaches percentage (%)；
The quality (g) of B- filters and sample；
The quality (g) of sample after C- filters and erosion；
A- filter qualities (g).
It is six classes by the water-fast effect analysis of stability of optical glass according to the leaching percentage drawn,
The water-fast effect stability (D of powder method of the low-melting glass of the present inventionW) it is more than 2 classes preferably 1 classes.
[the Knoop hardness of optical glass]
The Knoop hardness H of glass of the present inventionKRepresent, method is measured as defined in GB/T7962.18-2010.
By 20 × 20 × 20mm of present invention sample surfaces polishing, symmetrical corner angle are used for 172 ° 30 ' and 13 ° of corner Cone diamond penetrator applies certain load to it and is vertically pressed on sample surfaces, keeps after certain time, removes load, with micro- Sem observation and the length for measuring impression long-diagonal on sample, Knoop hardness is calculated by following equation.
HK=1.4229F/d2
F-load, N in formula；
The length of d-impression long-diagonal, mm；
HK- Knoop hardness, 107Pa。
The H of optical glass of the present inventionKFor 500 × 107More than Pa, preferably 510 × 107More than Pa, more preferably 515 × 107More than Pa.
IIth, optical precast product and optical element
Below, the optical precast product and optical element of the present invention is described.
The optical precast product of the present invention is formed with optical element by the optical glass of the invention described above.The optics of the present invention There is prefabricated component refractive index (nd) to be 1.63-1.70, and Abbe number (vd) is 45-50 optical characteristics；The optical element of the present invention It is 1.63-1.70 with refractive index (nd), Abbe number (vd) is 45-50 optical characteristics, can provide optics valency with low cost The optical elements such as value high various lens, prism, optical fiber rod, array, optical fiber optical window and compact component.
As the example of lens, can enumerate lens face for sphere or aspherical recessed meniscus shaped lens, male bend moon-shaped lens, The various lens such as biconvex lens, biconcave lens, planoconvex spotlight, plano-concave lens.
In addition, for prism, because refractive index is high, therefore by combining in camera optical system, passing through bending Light path, towards required direction, you can realize compact, wide-angle optics system.
IIIth, optical instrument
The optical element that optical glass of the present invention is formed can be used for all kinds of optical instruments, by using one or more light Element formation optical component or optical module are learned, is thrown available for such as imaging device, sensor, microscope, medical science, numeral Optics/illumination, photoetching technique, stepper, quasi-molecule in shadow, communication, optical communication technique/information transfer, automotive field swash Light device, chip, computer chip and integrated circuit and electronic device including such circuit and chip.
The present invention relates to the application of the optical component or optical module produced using above-mentioned optical element, the optical section Part or optical module can be used for such as sensor, microscope, medical science, digital projection, communication, optical communication technique/information Optics/illumination, photoetching technique, stepper, excimer laser, chip, computer chip and bag in transmission, automotive field Include the integrated circuit and electronic device of such circuit and chip.
[embodiment]
The present invention is explained using following examples, but the present invention should not be limited to these embodiments.
The melting and forming method for producing optical glass can be using well known to a person skilled in the art technology.Glass is former Material (carbonate, nitrate, sulfate, hydroxide, oxide, boric acid etc.) is weighed with merging according to the proportioning of glass oxide After well mixed, in input smelting apparatus (such as platinum crucible), then taken at 1150~1400 DEG C appropriate stirring, clarification, After homogenizing, less than 1250 DEG C are cooled to, cast or leakage note are in mould, the post-processing such as last annealed, processing, or It is molded by precise compression molding technology direct pressing.
[optical glass embodiment]
In addition, determining the characteristic of each glass of the present invention by method as shown below, and measurement result is represented in table 1 In~table 4, wherein, represent SiO with K12+B2O3, K2 represents La2O3/(TiO2+ZrO2), K3 represents (SiO2+TiO2)/(ZnO+ B2O3), K4 represents SrO/La2O3, K5 represents ZnO/ (CaO+SrO+BaO), and K6 represents SiO2/(B2O3+Al2O3)。
(1) refractive index (nd) and Abbe number (ν d)
Refractive index is tested with abbe number according to method as defined in GB/T7962.1-2010.
(2) the water-fast effect stability (D of powder methodW)
Measured according to GB/T17129-1997 method of testing.
(3) hardness (H of glassK)
Method is measured as defined in GB/T7962.18-2010.
(4) crystallization ceiling temperature
The crystallization property of glass is determined using temperature gradient furnace method, glass is made to 180*10*10mm sample, side is polished, It is put into the stove inside holding with thermograde to take out after 4 hours, under the microscope sight glass crystallization situation, crystal occurs in glass Corresponding maximum temperature is the crystallization ceiling temperature of glass.
Table 1
Table 2
Table 3
Table 4
[optical precast product embodiment]
Optical glass obtained by embodiment 1-10 in table 1 is cut into predefined size, then is equably coated with the surface Releasing agent, is then heated, softens, be press-formed, make recessed meniscus shaped lens, male bend moon-shaped lens, biconvex lens, The various lens such as biconcave lens, planoconvex spotlight, plano-concave lens, the prefabricated component of prism.
[optical element embodiment]
By these prefabricated components annealing obtained by above-mentioned optical precast product embodiment, the same of the deformation of inside glass is being reduced When be finely adjusted so that the optical characteristics such as refractive index reaches desirable value.
Then, each prefabricated component is ground, ground, make recessed meniscus shaped lens, male bend moon-shaped lens, biconvex lens, The various lens such as biconcave lens, planoconvex spotlight, plano-concave lens, prism.Antireflection can be also coated with the surface of gained optical element Film.

Claims (16)

1. optical glass, it is characterised in that its refractive index is 1.63-1.70, and Abbe number is 45-50, composition is by weight percentage Represent, contain：SiO2+B2O3：30-50%, and SrO/La2O3：0.5-6, SrO ＞ Al2O3。
2. optical glass as claimed in claim 1, it is characterised in that its composition is represented by weight percentage, is contained：SiO2： 26-45%；B2O3：1-9%；La2O3：1-9%；ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%； BaO：23-40%；Al2O3：0-8%.
3. optical glass, it is characterised in that its composition is represented by weight percentage, is contained：SiO2：26-45%；B2O3：1-9%； La2O3：0-9%；ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%；BaO：23-40%；Al2O3：0- 8%；Wherein SrO ＞ Al2O3。
4. the optical glass as described in claim 1-3 any claims, it is characterised in that also contain ZrO2：0-10%； Na2O：0-10%；K2O：0-10%；Sb2O3：0-1%.
5. optical glass, it is characterised in that its composition is expressed as by weight percentage：SiO2：26-45%；B2O3：1-9%； La2O3：0-9%；ZnO：5-20%；TiO2：1-10%；CaO：3-15%；SrO：1-10%；BaO：23-40%；Al2O3：0- 8%；ZrO2：0-10%；Na2O：0-10%；K2O：0-10%；Sb2O3：0-1%.
6. the optical glass as described in any rights of claim 1-5, it is characterised in that wherein：SiO2：28-40%；And/or B2O3：1-7%；And/or La2O3：1-7%；And/or ZnO：8-18%；And/or TiO2：1-8%；And/or CaO：5-13%；With/ Or SrO：2-9%；And/or BaO：25-38%；And/or Al2O3：More than 0-6%；And/or ZrO2：0-8%；And/or Na2O：0- 8%；And/or K2O：0-8%；And/or Sb2O3：0-0.5%.
7. the optical glass as described in claim 1-5 any claims, it is characterised in that wherein：SiO2：30-38%；With/ Or B2O3：1-6%；And/or La2O3：1-6%；And/or ZnO：9-15%；And/or TiO2：2-6%；And/or CaO：6-12%； And/or SrO：3-8%；And/or BaO：25-35%；And/or Al2O3：1-5%；And/or ZrO2：0-5%；And/or Na2O：0- 5%；And/or K2O：0-5%.
8. the optical glass as described in claim 1-5 any claims, it is characterised in that do not contain Li2O, PbO and/or P2O5And/or F.
9. the optical glass as described in claim 1-5 any claims, it is characterised in that the content of each component meets following One or more of 6 kinds of situations：
1)SiO2+B2O3：30-50%；
2)SrO/La2O3：0.5-6；
3)La2O3/(TiO2+ZrO2)：0.1-5；
4)ZnO/(CaO+SrO+BaO)：0.1-0.6；
5)SiO2/(B2O3+Al2O3)：3-15；
6)(SiO2+TiO2)/(ZnO+B2O3)：1-6.
10. the optical glass as described in claim 1-5 any claims, it is characterised in that the content of each component meet with One or more of lower 6 kinds of situations：
1)SiO2+B2O3：33-48%；
2)SrO/La2O3：0.8-5；
3)La2O3/(TiO2+ZrO2)：0.2-3；
4)ZnO/(CaO+SrO+BaO)：0.1-0.5；
5)SiO2/(B2O3+Al2O3)：4-10；
6)(SiO2+TiO2)/(ZnO+B2O3)：1.5-5.
11. the optical glass as described in claim 1-5 any claims, it is characterised in that the content of each component meet with One or more of lower 6 kinds of situations：
1)SiO2+B2O3：35-45%；
2)SrO/La2O3：1-3；
3)La2O3/(TiO2+ZrO2)：0.3-2；
4)ZnO/(CaO+SrO+BaO)：0.15-0.4；
5)SiO2/(B2O3+Al2O3)：4-8；
6)(SiO2+TiO2)/(ZnO+B2O3)：2-4.
12. the optical glass as described in claim 2-5 any claims, it is characterised in that the refractive index of glass is 1.63- 1.70, Abbe number is 45-50.
13. the optical glass as described in claim 1-5 any claims, it is characterised in that the crystallization ceiling temperature of glass For less than 1040 DEG C, powder method water-resistant stability (DW) to be more than 2 classes.
14. optical precast product, is made of the optical glass described in claim 1-13 any claims.
15. optical element, is made of the optical glass described in claim 1-13 any claims.
16. optical instrument, is made of the optical element described in claim 15.
CN201710556615.6A 2017-07-10 2017-07-10 Optical glass Pending CN107140825A (en)

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CN107663011A (en) * 2017-10-25 2018-02-06 成都光明光电股份有限公司 Optical glass
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CN107663011A (en) * 2017-10-25 2018-02-06 成都光明光电股份有限公司 Optical glass
CN107663011B (en) * 2017-10-25 2021-03-23 成都光明光电股份有限公司 Optical glass
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CN109626814A (en) * 2019-01-07 2019-04-16 成都光明光电股份有限公司 Environmental protection optical glass, optical precast product, optical element and optical instrument
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CN110128005B (en) * 2019-05-23 2021-12-07 成都光明光电股份有限公司 Optical glass
CN110550860A (en) * 2019-09-30 2019-12-10 成都光明光电股份有限公司 Optical glass
CN110845139A (en) * 2019-09-30 2020-02-28 成都光明光电股份有限公司 Optical glass
CN110526575A (en) * 2019-09-30 2019-12-03 成都光明光电股份有限公司 A kind of optical glass, optical precast product, optical element and optical instrument
CN110845139B (en) * 2019-09-30 2022-05-20 成都光明光电股份有限公司 Optical glass
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