CN104230166A

CN104230166A - Optical glass and optical element

Info

Publication number: CN104230166A
Application number: CN201310236794.7A
Authority: CN
Inventors: 匡波
Original assignee: Chengdu Guangming Optoelectronics Co Ltd
Current assignee: CDGM Glass Co Ltd; Chengdu Guangming Optoelectronics Co Ltd
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2014-12-24
Also published as: CN107555783A; CN107555783B

Abstract

The invention provides an optical glass with characteristics of low transition temperature, devitrification resistance, good chemical stability and low cost, the refractive index is 1.58-1.64, and the Abbe number is 60-67. The optical glass comprises the following composition by weight percentage: 30-50% of P2O5, 0.1-2% of La2O3, 0-5% of Gd2O3, 0.1-5% of Li2O, 2-10% of MgO, 3-10% of CaO, 30-50% of BaO, 0-5% of Al2O3, and no content of B2O3. In the optical glass, content of the composition can be adjusted in a reasonable mode, B2O3 and G2O2 components can not be added, and optical glass has good chemical stability and low transition temperature. The optical glass has stable anti-humid atmosphere effect with RC as grade 1, anti-acid effect stability RA is grade 1, the density of the optical glass is below 3.8g/cm<3>, the transition temperature is below than 520 DEG C, and the optical glass is adapted to fine molding and has low cost.

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 (n _d) be 1.58 ~ 1.64, Abbe number (v _d) be 60 ~ 67 opticglass, and the gas preform, optical element and the opticinstrument that are made up of this opticglass.

Background technology

In recent years, along with digital camera and the extensive of camera mobile phone are popularized, common spherical lens is also developing to non-spherical lens, and this just needs the opticglass of more medium refractive index, low dispersion.For reducing difficulty of processing and production cost, accurate die pressing technology becomes the primary selection that opticglass manufactures optical lens, but the opticglass wanting gained is suitable for accurate die pressing, then must have lower transition temperature, this also proposes higher requirement to opticglass research staff.

CN102476916A discloses a kind of opticglass, and it contains a large amount of B ₂o ₃, this can make glass volatility when melting increase, and the devitrification resistance of glass is deteriorated simultaneously, and its transition temperature is about 600 DEG C, and accurate die pressing temperature is obviously higher.CN101823839A discloses a kind of opticglass, wherein contains the ZnO of 20 ~ 34%, and so high Zn content will certainly make the devitrification resistance of glass and chemical stability reduce, and wherein also contains the GeO of 0.1 ~ 11% ₂, the cost of glass can be made to increase substantially.

Summary of the invention

Technical problem to be solved by this invention is to provide one and has lower transition temperature, devitrification resistance and chemical stability opticglass good and with low cost, its specific refractory power (n _d) be 1.58 ~ 1.64, Abbe number (v _d) be 60 ~ 67.

The technical scheme that technical solution problem of the present invention adopts is: opticglass, and its composition contains by weight percentage: P ₂o ₅: 30 ~ 50%, La ₂o ₃: 0.1 ~ 2%, Gd ₂o ₃: 0 ~ 5%, Li ₂o:0.1 ~ 5%, MgO:2 ~ 10%, CaO:3 ~ 10%, BaO:30 ~ 50%, Al ₂o ₃: 0 ~ 5%, but not containing B ₂o ₃.

Further, also contain: ZnO:0 ~ 1%, Sb ₂o ₃: 0 ~ 0.5%.

Further, its composition is by weight percentage: P ₂o ₅: 30 ~ 50%, ZnO:0 ~ 1%, La ₂o ₃: 0.1 ~ 2%, Gd ₂o ₃: 0 ~ 5%, Li ₂o:0.1 ~ 5%, MgO:2 ~ 10%, CaO:3 ~ 10%, BaO:30 ~ 50%, Al ₂o ₃: 0 ~ 5%, Sb ₂o ₃: 0 ~ 0.5%.

Further, wherein: P ₂o ₅: 35 ~ 47%.

Further, wherein: La ₂o ₃: 0.1 ~ 1.5%.

Further, wherein: Gd ₂o ₃: 0.5 ~ 3%.

Further, wherein: Li ₂o:0.5 ~ 3%.

Further, wherein: MgO:3 ~ 7%.

Further, wherein: CaO:4 ~ 8%.

Further, wherein: BaO:35 ~ 46%.

Further, wherein: Al ₂o ₃: 0.1 ~ 3%.

Further, the moisture resistant atmospheric action stability RC of described opticglass is 1 grade, and antiacid effect stability RA is 1 grade.

Further, described opticglass density is 3.8g/cm ³below, transition temperature is less than 520 DEG C.

Further, described optical glass refractive index is 1.58 ~ 1.64, and Abbe number is 60 ~ 67.

Adopt the gas preform that above-mentioned opticglass is made.

Adopt the optical element that above-mentioned opticglass is made.

Adopt the opticinstrument that above-mentioned opticglass is made.

The invention has the beneficial effects as follows: do not add B by the content of a Reasonable adjustment component ₂o ₃and GeO ₂component, makes glass have good chemical stability, and has lower transition temperature.The specific refractory power of opticglass of the present invention is 1.58 ~ 1.64, and Abbe number is 60 ~ 67, and moisture resistant atmospheric action stability RC is 1 grade, and antiacid effect stability RA is 1 grade, and opticglass density is 3.8g/cm ³below, transition temperature is less than 520 DEG C, is suitable for accurate die pressing and cost is lower.

Embodiment

To describe each component of opticglass of the present invention below, except as otherwise noted, the ratio of each component concentration represents with % by weight.

P ₂o ₅be that network generates body, be the principal element forming glass skeleton, its content easily causes glass devitrification resistance to worsen less, and content is crossed and chemical stability can be made at most to decline and the difficult optical property obtaining expection, therefore P ₂o ₅content be defined as 30 ~ 50%, preferred content is 35 ~ 47%.

ZnO can reduce the tendency towards devitrification of glass, but its content can not be too high, otherwise the devitrification resistance of glass and chemical stability can be made to reduce, and increases glass dispersion, so the content of ZnO is defined as 0 ~ 1%.

La ₂o ₃can be used for the specific refractory power, the reduction dispersion that improve glass, be necessary component of the present invention, if its too high levels can cause glass transition temperature to rise, devitrification resistance is deteriorated.Therefore La ₂o ₃content be defined as 0.1 ~ 2%, preferred content is 0.1 ~ 1.5%.

Gd ₂o ₃there is the effect improving glass refraction and chemical stability, especially in the present invention, Gd ₂o ₃with La ₂o ₃common existence, can significantly improve devitrification resistance performance and the chemical stability of glass, if its content is too much, then can improves the transition temperature of glass, be unfavorable for accurate die pressing, so Gd ₂o ₃be defined as 0 ~ 5%, preferred content is 0.5 ~ 3%.

Li ₂o is necessary component of the present invention, not only has and significantly reduces the transition temperature of glass and the effect of density, and also has stronger fluxing action.When its content lower than 0.1% time, to reducing, the effect of transition temperature is not obvious, if its content is higher than 5%, then glass devitrification resistance sharply declines.Therefore Li ₂the content range of O is 0.1 ~ 5%, is preferably 0.5 ~ 3%.

Na ₂o and K ₂the metal oxides such as O effectively can reduce transition temperature and the density of glass, improve the melting properties of glass, can be improved the chemical stability of glass simultaneously, therefore, can add a certain amount of Na in the present invention by mixed alkali effect ₂o and K ₂the metal oxides such as O.

MgO is conducive to improving the chemical stability of glass, and a certain amount of MgO adds, and is all effective to transition temperature and the yield point temperature reducing glass.If its too high levels, the devitrification resistance of glass can be made on the contrary significantly to worsen, and liquidus temperature also can raise, and therefore the content of MgO is defined as 2 ~ 10%, is preferably 3 ~ 7%.

CaO can improve the chemical stability of glass, has certain fluxing action, but its content can make the tendency towards devitrification of glass increase higher than 10%, so the content of CaO is defined as 3 ~ 10%, is preferably 4 ~ 8%.

SrO and MgO effect similar, be conducive to improving the chemical stability of glass, SrO can be added in right amount in the present invention.

BaO can reduce the dispersion of glass, improves the transmitance of glass simultaneously, is difficult at most obtain desired transition temperature and proportion if its content is crossed.Therefore the content range of BaO is 30 ~ 50%, is preferably 35 ~ 46%.

Al ₂o ₃the chemical stability of glass can be improved, increase the high temperature viscosity of glass, but when its content is higher than 5%, the devitrification resistance of glass can be made to reduce, increase melting difficulty, so Al ₂o ₃content be defined as 0 ~ 5%, be preferably 0.1 ~ 3%.

Sb ₂o ₃use as finings in the present invention, its content range is 0 ~ 0.5%.

The performance of opticglass of the present invention will be described below.

Wherein specific refractory power and Abbe number are tested according to " GB/T7962.1-1987 colouless optical glass testing method specific refractory power and abbe number ".

Transition temperature (Tg) is tested according to " GB/T7962.16-1987 colouless optical glass testing method linear expansivity, transition temperature and sag temperature ", that is: sample is in certain temperature range, temperature often raises 1 DEG C, on the expansion curve of sample, low-temperature region and high-temperature area straight line portion are extended and intersects, the temperature corresponding to its intersection point.

Density is tested according to " GB/T7962.20-1987 colouless optical glass testing method density measurement method ".

Moisture resistant atmospheric action stability RC (S) (surperficial method): according to being three grades to the analysis of stability of moist atmosphere effect, wherein:

1 grade: at temperature 50 C, under the condition of relative humidity 85%, glass polishing surface forms the time of hydrolysis spot more than 20h;

2 grades: at temperature 50 C, under the condition of relative humidity 85%, glass polishing surface forms the time of hydrolysis spot at 5 ~ 20h;

3 grades: at temperature 50 C, under the condition of relative humidity 85%, glass polishing surface forms the time of hydrolysis spot less than 5h.

Antiacid effect stability RA (S) (surperficial method): according to being three grades to the analysis of stability of acid solution effect, wherein:

1 grade: under the acetum effect of 0.1N (equivalent concentration), temperature 50 C, the collapse dept on glass polishing surface reaches the time of 135nm more than 5h;

2 grades: under the acetum effect of 0.1N, temperature 50 C, the collapse dept on glass polishing surface reaches the time of 135nm at 1 ~ 5h;

3 grades: under the acetum effect of 0.1N, temperature 50 C, the collapse dept on glass polishing surface reaches the time of 135nm less than 1h.

Through test, opticglass of the present invention has following performance: the moisture resistant atmospheric action stability RC (S) of opticglass is 1 grade; Antiacid effect stability RA (S) is 1 grade; Density (ρ) is 3.8g/cm ³below; Transition temperature (Tg) is less than 520 DEG C; Specific refractory power (n _d) be 1.58 ~ 1.64, Abbe number (v _d) be 60 ~ 67.

The present invention also provides a kind of opticglass prefabricated component and optical element, formed according to method well known to those skilled in the art by above-mentioned opticglass, and described optical precast product and optical element 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, will describe the embodiment of opticglass of the present invention below, it should be noted that, these embodiments do not limit the scope of the invention.

In table 1 ~ table 3, the embodiment 1 ~ 30 of display is by weighing according to the ratio of each embodiment table 1 ~ table 3 Suo Shi and hybrid optical glass common raw material (as oxide compound, oxyhydroxide, phosphoric acid salt, metaphosphate, carbonate and nitrate), mixing raw material is placed in crucible, melting in certain temperature, and after fusing, 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 the embodiment of the present invention 1 ~ 30 represents together with the result of specific refractory power (nd), Abbe number (vd), density (ρ), moisture resistant atmospheric action stability RC (S), antiacid effect stability RA (S), transition temperature (Tg) in table 1 ~ table 3.In these tables, the composition of each component represents with weight percent.

Table 1

Table 2

Table 3

Can be found out by the embodiment in above-mentioned table 1 ~ table 3, the present inventor is by the proportioning of each component of Reasonable adjustment, and opticglass moisture resistant atmospheric action stability RC (S) obtained is 1 grade; Antiacid effect stability RA (S) is 1 grade; Density (ρ) is 3.8g/cm ³below; Transition temperature (Tg) is less than 520 DEG C; Specific refractory power (n _d) be 1.58 ~ 1.64, Abbe number (v _d) be 60 ~ 67.

Claims

1. opticglass, is characterized in that, its composition contains by weight percentage: P ₂o ₅: 30 ~ 50%, La ₂o ₃: 0.1 ~ 2%, Gd ₂o ₃: 0 ~ 5%, Li ₂o:0.1 ~ 5%, MgO:2 ~ 10%, CaO:3 ~ 10%, BaO:30 ~ 50%, Al ₂o ₃: 0 ~ 5%, but not containing B ₂o ₃.

2. opticglass as claimed in claim 1, is characterized in that, also contain: ZnO:0 ~ 1%, Sb ₂o ₃: 0 ~ 0.5%.

3. opticglass as claimed in claim 1, it is characterized in that, its composition is by weight percentage: P ₂o ₅: 30 ~ 50%, ZnO:0 ~ 1%, La ₂o ₃: 0.1 ~ 2%, Gd ₂o ₃: 0 ~ 5%, Li ₂o:0.1 ~ 5%, MgO:2 ~ 10%, CaO:3 ~ 10%, BaO:30 ~ 50%, Al ₂o ₃: 0 ~ 5%, Sb ₂o ₃: 0 ~ 0.5%.

4. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: P ₂o ₅: 35 ~ 47%.

5. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: La ₂o ₃: 0.1 ~ 1.5%.

6. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: Gd ₂o ₃: 0.5 ~ 3%.

7. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: Li ₂o:0.5 ~ 3%.

8. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: MgO:3 ~ 7%.

9. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: CaO:4 ~ 8%.

10. the opticglass as described in claim as arbitrary in claims 1 to 3, is characterized in that, wherein: BaO:35 ~ 46%.

Opticglass as described in 11. claims as arbitrary in claims 1 to 3, is characterized in that, wherein: Al ₂o ₃: 0.1 ~ 3%.

Opticglass as described in 12. claims as arbitrary in claim 1 ~ 11, is characterized in that, the moisture resistant atmospheric action stability RC of described opticglass is 1 grade, and antiacid effect stability RA is 1 grade.

Opticglass as described in 13. claims as arbitrary in claim 1 ~ 11, is characterized in that, described opticglass density is 3.8g/cm ³below, transition temperature is less than 520 DEG C.

Opticglass as described in 14. claims as arbitrary in claim 1 ~ 11, it is characterized in that, described optical glass refractive index is 1.58 ~ 1.64, Abbe number is 60 ~ 67.

15. gas preforms adopting the opticglass in claim 1 ~ 14 described in arbitrary claim to make.

16. optical elements adopting the opticglass in claim 1 ~ 14 described in arbitrary claim to make.

17. opticinstruments adopting the opticglass in claim 1 ~ 14 described in arbitrary claim to make.