CN111217522A - Optical glass suitable for secondary compression and aspheric surface precision compression - Google Patents
Optical glass suitable for secondary compression and aspheric surface precision compression Download PDFInfo
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- CN111217522A CN111217522A CN201811422150.6A CN201811422150A CN111217522A CN 111217522 A CN111217522 A CN 111217522A CN 201811422150 A CN201811422150 A CN 201811422150A CN 111217522 A CN111217522 A CN 111217522A
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/253—Silica-free oxide glass compositions containing germanium
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Abstract
The invention relates to optical glass suitable for secondary compression and aspheric surface precision compression, belonging to the technical field of optical glass; the optical glass comprises the following components in parts by mole: ge + Ga: 10-40 parts of S + Se + Te: 30-65 parts of La2O35-18 parts of Y2O33-10 parts of ZrO20 to 12 portions of Nb2O510 to 15 portions of WO30.5-6 parts. The internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 78 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.5dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature. The viscosity is more than 1.75dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature; the glass transition temperature (Tg) of the optical glass is 260-750 ℃. The glass with the thickness of more than 25mm is not easy to generate crystallization and stripes, the yield is high, the glass is suitable for secondary compression, the quality of previous forming cannot be influenced, the factors such as the refractive index and the Abbe number of the optical glass cannot be influenced, the principle cost of the optical glass is low, and the optical glass does not contain any pairSubstances harmful to human body, and is suitable for popularization.
Description
Technical Field
The invention relates to optical glass suitable for secondary compression and aspheric surface precision compression, and belongs to the technical field of optical glass.
Background
At present, glass aspheric surface molding mainly comprises two types of isothermal molding and differential temperature molding, namely isothermal molding: putting a glass blank into a mould, softening the glass (not liquefying) by heating and pressurizing the multiple moulds, changing the glass blank into the shape of the mould, cooling the mould, and taking out a product; so-called differential temperature forming: the glass blank is heated before entering the mold to soften (rather than liquefy), then is sent into a molding environment, is pressurized by the mold to make the glass blank into the shape of the mold, and is taken out after cooling (note that the different-temperature molding mold always keeps a constant temperature). Simply, isothermal molding is to heat and cool the mold and the blank at the same time, and take out the mold and the blank at the same time; the different-temperature forming is to separately heat the blank, form, separately cool and take out the blank, and the temperature of the die is kept unchanged
After the aspheric lens is formed, the aspheric lens is cleaned and annealed, the reason of annealing is that glass is rapidly heated and quenched in the forming process, the shrinkage of the lens surface is not uniform, and the annealing principle is that the lens is slowly heated and cooled to enable the lens surface precision to reach the required value, in other words: the lens produced had poor surface accuracy without annealing. The annealing time is about 10 h-12 h (according to different lens materials), and each annealing furnace can anneal about 4000shot each time. Note that: the lens must be clean on its surface before entering the annealing furnace.
Optical glasses are glasses that change the direction of light propagation and change the relative spectral distribution of ultraviolet, visible, or infrared light. Optical glass in the narrow sense means colorless optical glass; the optical glass in a broad sense also includes colored optical glass, laser glass, quartz optical glass, radiation-resistant glass, ultraviolet infrared optical glass, fiber optical glass, acousto-optic glass, magneto-optic glass and photochromic glass. The optical glass can be used for manufacturing lenses, prisms, reflectors, windows and the like in optical instruments. Components made of optical glass are critical elements in optical instruments.
At present, the application field of optical glass is continuously expanded, the processing technology of the optical glass is also continuously improved, and a plurality of optical glasses need secondary compression; however, the existing optical glass is basically formed in one step, and the quality of the first forming of the optical glass is changed by subsequent re-pressing, and the problems of the optical glass such as the measured refractive index, transmittance, Abbe number and the like are also influenced.
Disclosure of Invention
The invention aims to provide optical glass which is reasonable in design, convenient to use and suitable for secondary compression and aspheric surface precision compression, and aims to overcome the defects and shortcomings of the prior art.
To achieve the above object, the present invention adoptsThe technical scheme is as follows: the optical glass comprises the following components in parts by mole: ge + Ga: 10-40 parts of S + Se + Te: 30-65 parts of La2O35-18 parts of Y2O33-10 parts of ZrO20 to 12 portions of Nb2O510 to 15 portions of WO30.5-6 parts.
The optical glass comprises the following components in parts by mole: ge + Ga: 20-25 parts of La2O330-50 parts of F + Cl + Br + I: 20-30 parts of Bi: 0-20 parts of Zn: 4-10 parts of Sn: 2-10 parts of Si: 0-10 parts of La: 0-5 parts of Li + Na + K + Cs: 3-10 parts.
Preferably, the optical glass comprises the following components in parts by mole: ge + Ga: 15-30 parts of S + Se + Te: 40-65 parts of La2O310-15 parts of, Y2O35-10 parts of ZrO24-6 parts of Nb2O512 to 15 portions of WO34-6 parts.
Preferably, the optical glass comprises the following components in parts by mole: ge + Ga: 22 to 25 parts of La2O330-40 parts, F + Cl + Br + I: 25-30 parts of Bi: 5-10 parts of Zn: 6-10 parts of Sn: 2-5 parts of Si: 0.5-2 parts of La: 1-2 parts of Li + Na + K + Cs: 4-5 parts.
Preferably, the optical glass comprises the following components in parts by mole: : ge + Ga30 parts, S + Se + Te: 50 parts of La2O38 parts of, Y2O37 parts of ZrO26 parts of Nb2O512 parts of WO34 parts.
Preferably, the optical glass comprises the following components in parts by mole: ge + Ga: 22 parts of La2O338 parts of F + Cl + Br + I: 26 parts, Bi: 5 parts, Zn: 8 parts of Sn: 3 parts of Si: 5 parts, Li + Na + K + Cs: 5 parts of the raw materials.
Preferably, the glass has a refractive index of 1.65 to 1.88 and an Abbe number of 33 to 38.
Preferably, the glass has a refractive index of 1.82 to 1.96 (excluding 1.96) and an Abbe number of 30 to 37.
Preferably, the glass has an internal transmittance τ 400nm at a wavelength of 400nm of greater than 78%; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.5dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature.
Preferably, the viscosity is greater than 1.75dPaS at 50 ℃ above the upper limit of the glass crystallization temperature.
Preferably, the glass transition temperature (Tg) of the optical glass is 260 to 750 ℃.
After adopting the structure, the invention has the beneficial effects that: the optical glass is suitable for secondary compression and aspheric surface precision compression; the method is suitable for aspheric surface precision profiling; the viscosity of the glass with the thickness of more than 25mm is more than 1.75dPaS at the temperature of more than 50 ℃, the glass is not easy to generate crystallization and stripes, the yield is high, the glass is suitable for secondary pressing, the quality of the previous forming cannot be influenced, the factors such as the refractive index, the Abbe number and the like of the optical glass cannot be influenced, the principle cost of the optical glass is low, substances harmful to human bodies are not contained, and the glass is suitable for popularization.
Detailed Description
The first embodiment is as follows:
the optical glass comprises the following components in parts by mole:
ge + Ga: 10 to 40 portions of
S + Se + Te: 30 to 65 portions of
La2O35-18 parts of
Y2O33-10 parts of
ZrO20 to 12 portions of
Nb2O510-15 parts of
WO30.5-6 parts.
The second embodiment is as follows:
the optical glass comprises the following components in parts by mole:
ge + Ga: 20 to 25 portions of
La2O330-50 parts of
F + Cl + Br + I: 20 to 30 portions of
Bi: 0 to 20 parts of
Zn: 4 to 10 portions of
Sn: 2 to 10 portions of
Si: 0 to 10 parts of
La: 0 to 5 parts of
Li + Na + K + Cs: 3-10 parts.
Examples
The first embodiment is as follows:
the optical glass comprises the following components in parts by mole: : ge + Ga30 parts, S + Se + Te: 50 parts of La2O38 parts of, Y2O37 parts of ZrO26 parts of Nb2O512 parts of WO34 parts.
The refractive index of the glass in the embodiment is 1.65-1.88, and the Abbe number is 33-38. The internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 75 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.5dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature. The viscosity is more than 1.75dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature. The glass transition temperature (Tg) of the optical glass is 280-700 ℃.
Example two:
the optical glass comprises the following components in parts by mole: ge + Ga: 22 parts of La2O338 parts of F + Cl + Br + I: 26 parts, Bi: 5 parts, Zn: 8 parts of Sn: 3 parts of Si: 5 parts, Li + Na + K + Cs: 5 parts of the raw materials.
The glass has a refractive index of 1.82-1.96 (excluding 1.96) and an Abbe number of 30-37. The internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 70 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.4dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature. The viscosity is more than 1.65dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature. The glass transition temperature (Tg) of the optical glass is 300-650 ℃.
Example three:
the optical glass comprises the following components in parts by mole: ge + Ga: 20 parts of S + Se + Te: 40 parts of La2O315 parts of, Y2O35 parts of ZrO26 parts of Nb2O515 portions of WO36 parts.
The refractive index of the glass in the embodiment is 1.65-1.88, and the Abbe number is 33-38. The internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 75 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.5dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature. The viscosity is more than 1.75dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature. The glass transition temperature (Tg) of the optical glass is 350-690 ℃.
Example four:
the optical glass comprises the following components in parts by mole: ge + Ga: 25 parts of La2O330 parts, F + Cl + Br + I: 27 parts, Bi: 7.5 parts, Zn: 8.5 parts of Sn: 3.5 parts of Si: 1.5 parts, La: 5 parts, Li + Na + K + Cs: 3.5 parts.
The glass has a refractive index of 1.82-1.96 (excluding 1.96) and an Abbe number of 30-37. The internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 70 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.4dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature. The viscosity is more than 1.65dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature. The glass transition temperature (Tg) of the optical glass is 320-700 ℃.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides an optical glass who is suitable for secondary die mould and accurate die mould of aspheric surface which characterized in that: the optical glass comprises the following components in parts by mole: ge + Ga: 10-40 parts of S + Se + Te: 30-65 parts of La2O35-18 parts of Y2O33-10 parts of ZrO20 to 12 portions of Nb2O510 to 15 portions of WO30.5-6 parts.
2. The optical system of claim 1, adapted for secondary compression and aspheric precision compressionGlass, its characterized in that: the optical glass comprises the following components in parts by mole: ge + Ga: 20-25 parts of La2O330-50 parts of F + Cl + Br + I: 20-30 parts of Bi: 0-20 parts of Zn: 4-10 parts of Sn: 2-10 parts of Si: 0-10 parts of La: 0-5 parts of Li + Na + K + Cs: 3-10 parts.
3. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the optical glass comprises the following components in parts by mole: ge + Ga: 15-30 parts of S + Se + Te: 40-65 parts of La2O310-15 parts of, Y2O35-10 parts of ZrO24-6 parts of Nb2O512 to 15 portions of WO34-6 parts.
4. The optical glass suitable for secondary pressing and aspheric surface precision pressing as claimed in claim 2, wherein: the optical glass comprises the following components in parts by mole: ge + Ga: 22 to 25 parts of La2O330-40 parts, F + Cl + Br + I: 25-30 parts of Bi: 5-10 parts of Zn: 6-10 parts of Sn: 2-5 parts of Si: 0.5-2 parts of La: 1-2 parts of Li + Na + K + Cs: 4-5 parts.
5. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the optical glass comprises the following components in parts by mole: : ge + Ga30 parts, S + Se + Te: 50 parts of La2O38 parts of, Y2O37 parts of ZrO26 parts of Nb2O512 parts of WO34 parts.
6. The optical glass suitable for secondary pressing and aspheric surface precision pressing as claimed in claim 2, wherein: the optical glass comprises the following components in parts by mole: ge + Ga: 22 parts of La2O338 parts of F + Cl + Br + I: 26 parts, Bi: 5 parts, Zn: 8 parts of Sn: 3 parts of Si: 5 parts, Li + Na + K + Cs: 5 parts of the raw materials.
7. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the refractive index of the glass is 1.65-1.88, and the Abbe number is 33-38.
8. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the refractive index of the glass is 1.82-1.96, and the Abbe number is 30-37.
9. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the internal transmittance tau 400nm of the glass at the wavelength of 400nm is more than 78 percent; tg temperature lower than 700 ℃; the upper limit temperature of crystallization is not higher than 1200 ℃; the viscosity is more than 1.5dPaS at the temperature of 50 ℃ above the upper limit of the crystallization temperature.
10. The optical glass suitable for secondary pressing and aspherical precision pressing as claimed in claim 1, wherein: the viscosity is more than 1.75dPaS at the temperature of 50 ℃ above the upper limit of the glass crystallization temperature; the glass transition temperature (Tg) of the optical glass is 260-750 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811422150.6A CN111217522A (en) | 2018-11-27 | 2018-11-27 | Optical glass suitable for secondary compression and aspheric surface precision compression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811422150.6A CN111217522A (en) | 2018-11-27 | 2018-11-27 | Optical glass suitable for secondary compression and aspheric surface precision compression |
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| Publication Number | Publication Date |
|---|---|
| CN111217522A true CN111217522A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811422150.6A Pending CN111217522A (en) | 2018-11-27 | 2018-11-27 | Optical glass suitable for secondary compression and aspheric surface precision compression |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935716A (en) * | 2005-09-21 | 2007-03-28 | Hoya株式会社 | Optical glass, glass cup for die pressing forming, glass forming body, optical element and manufacture method thereof |
| CN101209895A (en) * | 2007-12-25 | 2008-07-02 | 成都光明光电股份有限公司 | Precision optical glass for die pressing |
| CN101622207A (en) * | 2007-03-06 | 2010-01-06 | Hoya株式会社 | Opticglass, preform for press forming, optical element and their manufacture method |
| CN104341101A (en) * | 2013-07-31 | 2015-02-11 | 株式会社小原 | Optical glass, preform material and optical element |
| CN105967514A (en) * | 2016-05-10 | 2016-09-28 | 成都光明光电股份有限公司 | Lanthanum flint optical glass |
| CN106698926A (en) * | 2016-09-30 | 2017-05-24 | 成都光明光电股份有限公司 | Optical glass, glass prefabricated part, optical element and optical instrument |
| CN108290773A (en) * | 2015-11-20 | 2018-07-17 | 旭硝子株式会社 | Optical glass |
| CN108328921A (en) * | 2008-01-30 | 2018-07-27 | Hoya株式会社 | Optical glass |
-
2018
- 2018-11-27 CN CN201811422150.6A patent/CN111217522A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935716A (en) * | 2005-09-21 | 2007-03-28 | Hoya株式会社 | Optical glass, glass cup for die pressing forming, glass forming body, optical element and manufacture method thereof |
| CN101622207A (en) * | 2007-03-06 | 2010-01-06 | Hoya株式会社 | Opticglass, preform for press forming, optical element and their manufacture method |
| CN101209895A (en) * | 2007-12-25 | 2008-07-02 | 成都光明光电股份有限公司 | Precision optical glass for die pressing |
| CN108328921A (en) * | 2008-01-30 | 2018-07-27 | Hoya株式会社 | Optical glass |
| CN104341101A (en) * | 2013-07-31 | 2015-02-11 | 株式会社小原 | Optical glass, preform material and optical element |
| CN108290773A (en) * | 2015-11-20 | 2018-07-17 | 旭硝子株式会社 | Optical glass |
| CN105967514A (en) * | 2016-05-10 | 2016-09-28 | 成都光明光电股份有限公司 | Lanthanum flint optical glass |
| CN106698926A (en) * | 2016-09-30 | 2017-05-24 | 成都光明光电股份有限公司 | Optical glass, glass prefabricated part, optical element and optical instrument |
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