Optical glass, glass preform, optical element and optical instrument

Abstract

The invention provides optical glass, which comprises the following components in percentage by weight: 8 to 22 percent of P2O5; 30 to 60 percent of Bi2O3; 15 to 35 percent of Nb2O5; the ratio of the (Nb2O5 + P2O5) to the WO3 is 1.0 to 15.0 percent. Through reasonable component design, the optical glass obtained by the invention has excellent weather resistance and relatively high refractive index, and can be applied to the fields of vehicle-mounted and monitoring security and protection and the like.

Description

[0001] This application is a divisional application for the invention patent application with application number 202110291078.3, application date March 18, 2021, and name “Optical glass, glass preforms, optical elements and optical instruments”. Technical Field

[0002] The invention relates to optical glass, in particular to high-refractive-index optical glass, and glass preforms, optical elements and optical instruments made of the same. Background Art

[0003] In recent years, various optical instruments such as digital cameras, camcorders, projectors and projection TVs have been developing towards digitalization and high definition. In order to make optical instruments smaller and lighter, it is necessary to reduce the number of lenses and prisms used in the optical system. High refractive index optical glass is in great demand because it can achieve a larger viewing angle with a smaller volume, thereby reducing the number of optical glasses used in optical instruments. With the rapid development of technologies such as vehicle-mounted imaging and monitoring security, optical glass is widely used in the above fields. Since the optical glass used in vehicle-mounted equipment and monitoring security is exposed to the outdoors for a long time, it is required to have good weather resistance to cope with various environments and climates.

[0004] Based on the above reasons, the development of an optical glass with a high refractive index and excellent weather resistance is of great significance to the development of optoelectronic information technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an optical glass with a higher refractive index and excellent weather resistance.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] (1) Optical glass, the components of which, expressed in percentage by weight, contain: P 2 O 5 :8~25%;Bi 2 O 3 :30~60%; Nb 2 O 5 :15~35%;WO 3 : 3~25%, among which (Nb 2 O 5 +P 2 O 5 ) / WO 3 It is 1.0~15.0.

[0008] (2) The optical glass according to (1), wherein the composition, expressed in weight percentage, further comprises: TiO 2:0~10%;and / or B 2 O 3 :0~10%; and / or BaO:0~10%; and / or MgO:0~10%; and / or CaO:0~10%; and / or SrO:0~10%; and / or ZnO:0~10%; and / or Li 2 O: 0~10%; and / or Na 2 O: 0-10%; and / or K 2 O: 0-10%; and / or SiO 2 +Al 2 O 3 +ZrO 2 :0~10%;and / or Ln 2 O 3 :0~10%; and / or TeO 2 :0~5%;and / or GeO 2 :0~5%;and / or Ga 2 O 3 :0~5%;and / or Ta 2 O 5 :0~5%;and / or F:0~5%;and / or clarifier:0~2%,the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

[0009] (3) Optical glass, containing P 2 O 5 , Nb 2 O 5 , WO 3 and Bi 2 O 3 As an essential component, its composition is expressed in weight percentage, among which (Nb 2 O 5 +P 2 O 5 ) / WO 3 The refractive index n of the optical glass is 1.0 to 15.0. d is 1.92 or more, the Abbe number νd The CR value is 26 or less, and the weather resistance CR value is 2 or more.

[0010] (4) The optical glass according to (3), wherein the composition, expressed in weight percentage, comprises: 2 O 5 :8~25%; and / or Bi 2 O 3 :30~60%; and / or Nb 2 O 5 :15~35%;and / or WO 3 :3~25%; and / or TiO 2 :0~10%;and / or B 2 O 3 :0~10%; and / or BaO:0~10%; and / or MgO:0~10%; and / or CaO:0~10%; and / or SrO:0~10%; and / or ZnO:0~10%; and / or Li 2 O: 0~10%; and / or Na 2 O: 0-10%; and / or K 2 O: 0-10%; and / or SiO 2 +Al 2 O 3 +ZrO 2 :0~10%;and / or Ln 2 O 3 :0~10%; and / or TeO 2 :0~5%;and / or GeO 2 :0~5%;and / or Ga 2 O 3 :0~5%;and / or Ta 2 O 5 :0~5%;and / or F:0~5%;and / or clarifier:0~2%,the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

[0011] (5) Optical glass, the components of which are expressed in weight percentage, consisting of P 2 O 5 :8~25%;Bi 2 O 3 :30~60%; Nb 2 O 5 :15~35%;WO 3 :3~25%;TiO 2 :0~10%; B 2 O 3 : 0~10%; BaO: 0~10%; MgO: 0~10%; CaO: 0~10%; SrO: 0~10%; ZnO: 0~10%; Li 2 O: 0-10%; Na 2 O: 0-10%; K 2 O: 0-10%; SiO 2 +Al 2 O 3 +ZrO 2 :0~10%; Ln 2 O 3 :0~10%;TeO 2 :0~5%;GeO 2 :0~5%;Ga 2 O 3 :0~5%;Ta 2 O 5 :0~5%;F:0~5%;Clarifying agent:0~2% composition, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

[0012] (6) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.6 to 2.3, preferably Bi2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.7 to 2.0, more preferably Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.8 to 1.5, and Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.9~1.3.

[0013] (7) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.3 to 1.3, preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.4 to 1.0, more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.5 to 0.8, and more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 It is 0.55~0.75.

[0014] (8) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.0 to 15.0, preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.5 to 12.0, more preferably (Nb 2 O 5 +P2 O 5 ) / WO 3 is 2.5 to 10.0, and more preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 It is 3.0~7.0.

[0015] (9) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.4 to 2.0, preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.5 to 1.5, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.6 to 1.2, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.65~1.0.

[0016] (10) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.1 or more, preferably TiO 2 / (SiO 2 +Al 2 O 3 +ZrO2 ) is 0.3 or more, and TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.5 to 20.0, and TiO is more preferred 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.8~10.0.

[0017] (11) The optical glass according to any one of (1) to (5), wherein the composition is expressed in weight percentage, wherein: Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.3 to 1.0, preferably Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.4 to 0.9, preferably Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.5 to 0.8, and Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.5~0.75.

[0018] (12) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: WO 3 / (Li 2 O+Na 2 O+K 2 O) is 0.2 or more, preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 0.5 or more, more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 1.0 to 15.0, and more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 1.5~8.0.

[0019] (13) The optical glass according to any one of (1) to (5), wherein the composition is expressed in weight percentage, wherein: ZnO / (TiO 2 +BaO) is 5.0 or less, preferably ZnO / (TiO 2 +BaO) is 3.0 or less, and more preferably ZnO / (TiO 2 +BaO) is 1.5 or less, and ZnO / (TiO 2 +BaO) is less than 0.8.

[0020] (14) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.5 to 2.5, preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.7 to 2.0, more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.8 to 1.8, and more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 It is 1.0~1.5.

[0021] (15) The optical glass according to any one of (1) to (5), wherein the components are expressed in weight percentage, wherein: 2 O 5 : 12~22%, preferably P 2 O 5 :13~19%; and / or Bi 2 O 3 : 35-55%, preferably Bi 2 O 3:38~50%; and / or Nb 2 O 5 : 18-30%, preferably Nb 2 O 5 :20~28%;and / or WO 3 : 4-20%, preferably WO 3 :6~15%; and / or TiO 2 : 0.5-8%, preferably TiO 2 :1~5%; and / or B 2 O 3 : 0~8%, preferably B 2 O 3 : 0-5%; and / or BaO: 0-6%, preferably BaO: 0-5%; and / or MgO: 0-5%, preferably MgO: 0-3%; and / or CaO: 0-5%, preferably CaO: 0-3%; and / or SrO: 0-5%, preferably SrO: 0-3%; and / or ZnO: 0-6%, preferably ZnO: 0-5%; and / or Li 2 O: 0-5%, preferably Li 2 O: 0~3%; and / or Na 2 O: 0.5-8%, preferably Na 2 O: 1-6%; and / or K 2 O: 0-6%, preferably K 2 O: 0-5%; and / or SiO 2 +Al 2 O 3 +ZrO 2 : greater than 0 but less than or equal to 8%, preferably SiO 2 +Al 2 O 3 +ZrO 2 :0.1~5%; and / or Ln 2 O 3 : 0~5%, preferably Ln 2 O 3 :0~3%; and / or TeO 2 : 0-3%, preferably TeO 2 :0~1%; and / or GeO 2 : 0~3%, preferably GeO 2 :0~1%; and / or Ga 2 O 3 :0~3%, preferably Ga 2 O 3 :0~1%; and / or Ta 2 O 5 : 0~3%, preferably Ta 2 O 5: 0-1%; and / or F: 0-3%, preferably F: 0-1%; and / or clarifier: 0-1%, preferably clarifier: 0-0.5%, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

[0022] (16) The optical glass according to any one of (1) to (5), wherein the composition does not contain Ta. 2 O 5 ; and / or does not contain GeO 2 ; and / or does not contain F; and / or does not contain Ln 2 O 3 ; and / or does not contain TeO 2 ; and / or does not contain Ga 2 O 3 .

[0023] (17) The optical glass according to any one of (1) to (5), wherein the refractive index n of the optical glass is d is 1.92 or more, preferably 1.94 or more, more preferably 1.96 to 2.10, and further preferably 1.98 to 2.05; Abbe number ν d It is 26 or less, preferably 24 or less, more preferably 16-22, and further preferably 18-21.

[0024] (18) The optical glass according to any one of (1) to (5), wherein the acid resistance stability of the optical glass is A 2 or more, preferably 1; and / or water resistance stability D W is 2 or more, preferably 1; and / or the weather resistance CR is 2 or more, preferably 1; and / or the thermal expansion coefficient α -30 / 70℃ 110×10 -7 / K or less, preferably 100×10 -7 / K or less, more preferably 90×10 -7 / K or below; and / or transition temperature T g520°C or less, preferably 510°C or less, more preferably 500°C or less, and further preferably 495°C or less; and / or abrasion degree F A 390 or less, preferably 380 or less, more preferably 360 or less; and / or Knoop hardness H K 350×10 7 Pa or more, preferably 360×10 7 Pa or more, more preferably 370×10 7 Pa or more, more preferably 380×10 7 Pa or above; and / or λ 70 485 nm or less, preferably 480 nm or less, more preferably 470 nm or less; and / or λ 5 It is 425 nm or less, preferably 420 nm or less, and more preferably 410 nm or less.

[0025] (19) A glass preform made of the optical glass described in any one of (1) to (18).

[0026] (20) An optical element made of the optical glass described in any one of (1) to (18) or the glass preform described in (19).

[0027] (21) An optical instrument comprising the optical glass described in any one of (1) to (18) and / or the optical element described in (20).

[0028] The beneficial effects of the present invention are as follows: through reasonable component design, the optical glass obtained by the present invention has excellent weather resistance and high refractive index, and meets the application requirements in the fields of vehicle-mounted, monitoring and security, etc. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the optical glass of the present invention, but the present invention is not limited to the following embodiments and can be implemented with appropriate changes within the scope of the purpose of the present invention. In addition, although there are appropriate omissions of the description of the repeated description, the main purpose of the invention will not be limited thereby. In the following content, the optical glass of the present invention is sometimes referred to as glass.

[0030] [Optical glass]

[0031] The following is an explanation of the range of each component (ingredient) of the optical glass of the present invention. In the present invention, unless otherwise specified, the content and total content of each component are all expressed in weight percentage (wt%), that is, the content and total content of each component are expressed in weight percentage relative to the total amount of glass material converted into oxide composition. Here, the "composition converted into oxide" means that when the oxides, complex salts and hydroxides used as raw materials for the optical glass components of the present invention decompose and transform into oxides during melting, the total amount of the oxide material is taken as 100%.

[0032] Unless otherwise specified in specific circumstances, the numerical ranges listed in the present invention include upper and lower limits, "above" and "below" include endpoint values, and all integers and fractions included in the range, without being limited to the specific values ​​listed when the range is defined. "And / or" referred to herein is inclusive, for example, "A and / or B" means only A, or only B, or both A and B.

[0033] <Essential Components and Optional Components>

[0034] P 2 O 5 It is the product of the glass of the present invention, which has the effect of lowering the melting temperature of the glass raw materials and improving the stability and visible light transmittance of the glass. 2 O 5 To obtain the above effect, P 2 O 5 The content of P is 12% or more, preferably P 2 O 5 On the other hand, if P 2 O 5 If the content of P exceeds 25%, it is difficult for the glass to obtain the desired high refractive index, and the devitrification tendency of the glass increases. 2 O 5 The content of is 25% or less, preferably 22% or less, and more preferably 19% or less.

[0035] Bi 2 O 3 The refractive index of the glass can be increased and the transition temperature can be lowered. In the present invention, more than 30% Bi 2 O 3 To obtain the above effect, Bi 2 O 3 The content of Bi is 35% or more, more preferably 2 O 3 The content of Bi is above 38%. 2 O 3When the content of Bi exceeds 60%, the light transmittance of the glass decreases, the abrasiveness and chemical stability deteriorate, and the density increases significantly. 2 O 3 The upper limit of the content is 60%, preferably 55%, and more preferably 50%.

[0036] Nb 2 O 5 It is a high refractive and high dispersion component, which can improve the refractive index, light transmittance and devitrification resistance of glass and reduce the thermal expansion coefficient of glass. 2 O 5 In order to obtain the above effects, Nb is preferably 2 O 5 The lower limit of the content of Nb is 18%, and Nb is more preferably 2 O 5 The lower limit of Nb content is 20%. 2 O 5 The content of Nb exceeds 35%, the thermal stability and chemical stability of the glass decrease, and the light transmittance decreases. Therefore, in the present invention, 2 O 5 The upper limit of the content is 35%, preferably 30%, and more preferably 28%.

[0037] In some embodiments, Bi 2 O 3 The content of Nb 2 O 5 and P 2 O 5 Total content (Nb 2 O 5 +P 2 O 5 ) 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is controlled within the range of 0.6 to 2.3, the optical glass can effectively reduce the transition temperature of the glass while obtaining the desired high refraction and high dispersion, and obtain a suitable abrasiveness. Therefore, Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.6 to 2.3, more preferably Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5) is 0.7 to 2.0, and Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.8 to 1.5, and Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.9~1.3.

[0038] WO 3 It can improve the refractive index, central dispersion and mechanical strength of glass and reduce the transition temperature of glass. In the present invention, more than 3% WO 3 To obtain the above effects, WO is preferred 3 The lower limit of the content is 4%, and more preferably WO 3 The lower limit of WO content is 6%. 3 If the content of WO exceeds 25%, the thermal stability of the glass decreases and the resistance to devitrification decreases. 3 The upper limit of the content is 25%, preferably 20%, and more preferably 15%.

[0039] The inventors have found through a large number of experimental studies that in some embodiments, Nb 2 O 5 and P 2 O 5 Total content (Nb 2 O 5 +P 2 O 5 ) and WO 3 The ratio between the contents of Nb 2 O 5 +P 2 O 5 ) / WO 3 Controlling within the range of 1.0 to 15.0 can improve the weather resistance of the glass. Therefore, it is preferred that (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.0 to 15.0, more preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.5 to 12.0. Further, by making (Nb 2 O 5 +P 2 O5 ) / WO 3 In the range of 2.5 to 10.0, the abrasiveness of the glass can be further optimized. Therefore, it is further preferred that (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 2.5 to 10.0, and more preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 It is 3.0~7.0.

[0040] TiO 2 It has the effect of significantly increasing the refractive index and dispersion of glass, and can participate in the formation of glass network, improve the chemical stability of glass, and a proper amount of it can make the glass more stable and reduce the viscosity of the glass. 2 When the content exceeds 10%, the crystallization tendency of the glass increases, the transition temperature of the glass rises, and the coloring degree of the glass increases. 2 The content is 10% or less, preferably 0.5 to 8%, more preferably 1 to 5%.

[0041] In some embodiments, Nb 2 O 5 , WO 3 、TiO 2 and P 2 O 5 Total content (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) and Bi 2 O 3 The ratio between the contents of Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 Controlling within the range of 0.5 to 2.5 can improve the weather resistance and hardness of the glass. 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3is 0.5 to 2.5, more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.7 to 2.0, and more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.8 to 1.8, and more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 It is 1.0~1.5.

[0042] In some embodiments of the present invention, Nb 2 O 5 and TiO 2 Total content (Nb 2 O 5 +TiO 2 ) and Bi 2 O 3 The ratio between the contents of Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 Controlling within the range of 0.3 to 1.3 can help improve stability and reduce density while obtaining the desired optical constants. 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.3 to 1.3, more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.4 to 1.0. Further, (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3Controlling within the range of 0.5 to 0.8 can further optimize the chemical stability and abrasion resistance of the glass. Therefore, it is further preferred that (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.5 to 0.8, and more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 It is 0.55~0.75.

[0043] B 2 O 3 As a network former, its role is similar to that of P 2 O 5 Similar. 2 O 5 Add appropriate amount of B to the glass 2 O 3 , which can make the layered or interwoven chain structure tend to the skeleton structure, and improve the glass's resistance to devitrification and chemical stability. 2 O 3 If the content is higher than 10%, the refractive index of the glass decreases, the temperature coefficient of refractive index increases, and the resistance to devitrification deteriorates. 2 O 3 The content is limited to 0-10%, preferably 0-8%, and more preferably 0-5%.

[0044] BaO is an optional component for adjusting the refractive index of glass, improving the light transmittance and strength of glass in the present invention. If its content exceeds 10%, the anti-crystallization performance and chemical stability of glass will deteriorate. Therefore, the content of BaO is 0-10%, preferably 0-6%, and more preferably 0-5%.

[0045] In some embodiments of the present invention, by making Nb 2 O 5 , P 2 O 5 、TiO 2 The total content of Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) and Bi 2 O 3 and WO 3 Total content (Bi 2 O 3 +WO 3 ) between the 2O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) in the range of 0.4 to 2.0 can improve the glass forming stability and resistance to devitrification. 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.4 to 2.0, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.5 to 1.5. Further, by making (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is within the range of 0.6 to 1.2, the hardness and chemical stability of the glass can be further improved. 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.6 to 1.2, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.65~1.0.

[0046] SrO can adjust the refractive index and Abbe number of glass, but if the content is too high, the chemical stability and refractive index of the glass will decrease. Therefore, the content of SrO is limited to 0-10%, preferably 0-5%, and more preferably 0-3%. In some embodiments, it is further preferred that SrO is not contained.

[0047] CaO helps to adjust the optical constants of glass and improve the processing properties of glass, but when the CaO content is too high, the anti-devitrification performance of glass deteriorates. Therefore, the content of CaO is limited to 0-10%, preferably 0-5%, and more preferably 0-3%. In some embodiments, it is further preferred that CaO is not contained.

[0048] MgO can reduce the melting temperature of glass, but when the MgO content is too high, the refractive index of the glass cannot meet the design requirements, the anti-crystallization performance and stability of the glass decrease, and the cost of the glass increases. Therefore, the content of MgO is limited to 0-10%, preferably 0-5%, and more preferably 0-3%. In some embodiments, it is further preferred that MgO is not contained.

[0049] ZnO can adjust the refractive index and dispersion of glass and improve the stability of glass. ZnO can also reduce the high temperature viscosity and transition temperature of glass, so that glass can be melted at a lower temperature, thereby improving the light transmittance of glass. On the other hand, if the ZnO content is too high, the refractive index of glass decreases and the anti-crystallization performance deteriorates. Therefore, the ZnO content is 0-10%, preferably 0-6%, and more preferably 0-5%.

[0050] In some embodiments of the present invention, the content of ZnO is 2 The total content of TiO 2 The ratio between ZnO / (TiO +BaO) 2 +BaO) is controlled below 5.0 to prevent the glass thermal expansion coefficient from increasing and the anti-crystallization performance from deteriorating. Therefore, ZnO / (TiO 2 +BaO) is 5.0 or less, and more preferably ZnO / (TiO 2 +BaO) is less than 3.0. Furthermore, ZnO / (TiO 2 +BaO) is controlled below 1.5, which is also beneficial to optimize the high temperature viscosity of the glass and improve the stripe and bubble degree of the glass. Therefore, ZnO / (TiO 2 +BaO) is 1.5 or less, and ZnO / (TiO 2 +BaO) is less than 0.8.

[0051] Li 2O can reduce the transition temperature of glass, but its high content is not good for the acid resistance and thermal expansion coefficient of glass. 2 The content of O is 0 to 10%, preferably 0 to 5%, and more preferably 0 to 3%.

[0052] Na 2 O can improve the melting property of glass and reduce the transition temperature of glass. 2 When the O content exceeds 10%, the chemical stability and weather resistance of the glass decrease. 2 The content of O is 0 to 10%, preferably 0.5 to 8%, and more preferably 1 to 6%.

[0053] K 2 O has the effect of improving the thermal stability and melting property of glass, but if its content exceeds 10%, the devitrification resistance of glass decreases and the chemical stability deteriorates. 2 The content of O is 0 to 10%, preferably 0 to 6%, and more preferably 0 to 5%.

[0054] Li 2 O、Na 2 O.K 2 O are all alkali metal oxides. In some embodiments, by making Na 2 O / (Li 2 O+Na 2 O+K 2 O) in the range of 0.3 to 1.0 is beneficial to improving the anti-crystallization performance and light transmittance of the glass. Therefore, Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.3 to 1.0, preferably Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.4 to 0.9. Further, by making Na 2 O / (Li 2 O+Na 2 O+K 2 O) in the range of 0.5 to 0.8 is also beneficial to improving the weather resistance of the glass. 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.5 to 0.8, and Na 2 O / (Li 2 O+Na 2 O+K 2O) is 0.5~0.75.

[0055] In some embodiments of the present invention, by making WO 3 The content of alkali metal oxides (Li 2 O+Na 2 O+K 2 O) ratio WO 3 / (Li 2 O+Na 2 O+K 2 O) is above 0.2, which can optimize the abrasiveness of the glass and reduce the thermal expansion coefficient of the glass. Therefore, WO is preferred. 3 / (Li 2 O+Na 2 O+K 2 O) is 0.2 or more, more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 0.5 or more. Furthermore, by making WO 3 / (Li 2 O+Na 2 O+K 2 O) in the range of 1.0 to 15.0 can also prevent the decrease of glass light transmittance and optimize the anti-crystallization performance. Therefore, WO is further preferred. 3 / (Li 2 O+Na 2 O+K 2 O) is 1.0 to 15.0, and more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 1.5~8.0.

[0056] SiO 2 、Al 2 O 3 and ZrO 2 It has the effect of improving the mechanical properties of glass and improving the stability of glass, but when the content is high, the transition temperature of glass increases. 2 、Al 2 O 3 and ZrO 2 Total content of SiO 2 +Al 2 O 3 +ZrO 2 0-10%, preferably SiO 2 +Al 2 O 3 +ZrO2 is greater than 0 but less than or equal to 8%, more preferably SiO 2 +Al 2 O 3 +ZrO 2 It is 0.1~5%.

[0057] In some embodiments of the present invention, by making TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is above 0.1, which is beneficial to adjust the molding viscosity of the glass and optimize the stripe degree of the glass. Therefore, TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.1 or more, and TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.3 or more. Further, by making TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is within the range of 0.5 to 20.0, which can also prevent the glass from having a low hardness while obtaining a low thermal expansion coefficient. Therefore, TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.5 to 20.0, and TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.8~10.0.

[0058] Ln 2 O 3 (Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3One or more of Ln can improve the refractive index and chemical stability of the glass and is an optional component in the optical glass of the present invention. 2 O 3 The content of Ln is controlled to be less than 10%, which can prevent the devitrification resistance of the glass from decreasing. 2 O 3 The upper limit of the content range is 5%, and the more preferred upper limit is 3%. In some embodiments, it is further preferred that Ln is not contained. 2 O 3 .

[0059] TeO 2 It is an optional component that increases the refractive index of glass and lowers the transition temperature of glass. When its content is too high, it is easy to react with the platinum crucible, seriously damaging the service life of the production equipment. 2 The content is limited to 5% or less, preferably 3% or less, and more preferably 1% or less. In some embodiments, it is further preferred that TeO is not contained. 2 .

[0060] GeO 2 GeO has the effect of increasing the refractive index of the glass and increasing the resistance to devitrification. It is an optional component of the optical glass of the present invention. However, it is expensive. Excessive inclusion is not conducive to cost reduction and reduces the light transmittance of the glass. Therefore, its content is limited to 5% or less, preferably 3% or less, and more preferably 1% or less. In some embodiments, it is further preferred not to contain GeO 2 .

[0061] As an optional component of the present invention, by controlling Ga 2 O 3 The content of Ga is below 5%, which can improve the resistance of glass to devitrification and optimize the abrasiveness of glass. 2 O 3 The content of Ga is 5% or less, preferably 3% or less, and more preferably 1% or less. In some embodiments, it is further preferred that Ga is not contained. 2 O 3 .

[0062] Ta 2 O 5 It has the effect of increasing the refractive index and improving the devitrification resistance of glass. However, if its content is too high, the chemical stability of the glass will decrease. Moreover, compared with other components, Ta 2 O 5 The price of Ta is very expensive, and from the perspective of practicality and cost, its usage should be reduced as much as possible. 2 O 5 The content of Ta is limited to 0-5%, preferably 0-3%, and more preferably 0-1%. In some embodiments, it is further preferred that Ta is not contained.2 O 5 .

[0063] F (fluorine) is an effective component for reducing the refractive index and dispersion and lowering the glass transition temperature. However, when it is contained in excessive amounts, the chemical stability and hardness of the glass are reduced, the refractive index is significantly reduced, the volatility of the glass melt increases, textures are generated during glass molding, or there is a tendency for the refractive index to change more due to volatilization. Therefore, the preferred F content of the present invention is 0 to 5%, more preferably 0 to 3%, and even more preferably 0 to 1%. In some embodiments, it is further preferred that F is not contained.

[0064] In the present invention, 0 to 2% Sb is contained 2 O 3 、SnO、SnO 2 、CeO 2 One or more components in the glass can be used as a clarifier to improve the clarification effect of the glass. Preferably, the content of the clarifier is 0 to 1%, more preferably 0 to 0.5%. In some embodiments, Sb is preferably used. 2 O 3 As a clarifier, it has the effect of improving the coloring of the glass, and more preferably does not contain SnO and / or SnO 2 , and / or CeO 2 .

[0065] <Components that should not be contained>

[0066] In the glass of the present invention, even if oxides of transition metals such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo are contained alone or in combination in small amounts, the glass will be colored and absorption will occur at specific wavelengths in the visible light region, thereby weakening the property of the present invention of improving the visible light transmittance. Therefore, it is preferably substantially free of oxides of transition metals such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag and Mo, especially for optical glasses that require transmittance at wavelengths in the visible light region.

[0067] The oxides of Th, Cd, Tl, Os, Be and Se have a tendency to be controlled in recent years as harmful chemical substances, and environmental protection measures are necessary not only in the manufacturing process of glass, but also in the processing process and the disposal after productization. Therefore, in the case of paying attention to the impact on the environment, it is preferred that they are not actually contained except for being inevitably mixed in. Thus, the optical glass does not actually contain substances that pollute the environment. Therefore, even if special environmental countermeasures are not taken, the optical glass of the present invention can be manufactured, processed and discarded.

[0068] In order to achieve environmental friendliness, the optical glass of the present invention preferably does not contain As 2 O 3 and PbO.

[0069] The "does not contain" and "0%" recorded in this article mean that the compound, molecule or element is not intentionally added as a raw material to the optical glass of the present invention; however, as raw materials and / or equipment for producing optical glass, there will be certain impurities or components that are not intentionally added, which will be contained in a small amount or trace amount in the final optical glass, and this situation is also within the scope of protection of the patent of this invention.

[0070] Next, the properties of the optical glass of the present invention will be described.

[0071] <Refractive Index and Abbe Number>

[0072] The refractive index of optical glass (n d ) and the Abbe number (ν d ) Tested according to the method specified in GB / T 7962.1-2010.

[0073] In some embodiments, the refractive index (n d ) has a lower limit of 1.92, a preferred lower limit of 1.94, a more preferred lower limit of 1.96, and a further preferred lower limit of 1.98.

[0074] In some embodiments, the refractive index (n d ) has an upper limit of 2.15, a preferred upper limit of 2.10, and a more preferred upper limit of 2.05.

[0075] In some embodiments, the Abbe number (ν d ) has an upper limit of 26, a preferred upper limit of 24, a more preferred upper limit of 22, and a further preferred upper limit of 21.

[0076] In some embodiments, the Abbe number (ν d ) has a lower limit of 12, a preferred lower limit of 14, a more preferred lower limit of 16, and a further preferred lower limit of 18.

[0077] <Transition Temperature>

[0078] Transition temperature of optical glass (T g ) The test shall be carried out in accordance with the method specified in GB / T7962.16-2010.

[0079] In some embodiments, the transition temperature (T g ) is 520°C or lower, preferably 510°C or lower, more preferably 500°C or lower, and further preferably 495°C or lower.

[0080] <Color>

[0081] The short-wave transmission spectrum characteristics of the glass of the present invention are expressed by the coloration degree (λ70 and λ 5 ) indicates. 70 It refers to the wavelength when the glass transmittance reaches 70%. 70 The measurement is to use a glass with a thickness of 10±0.1mm and two opposite planes parallel to each other and optically polished, and measure the spectral transmittance in the wavelength range from 280nm to 700nm and the wavelength at which the transmittance is 70%. The so-called spectral transmittance or transmittance is the wavelength at which the incident intensity I is perpendicular to the above surface of the glass. in Light of intensity I passes through the glass and emerges from a plane out The light of the case through I out / I in The amount expressed by λ also includes the transmittance of the surface reflection loss on the above surfaces of the glass. The higher the refractive index of the glass, the greater the surface reflection loss. Therefore, in high refractive index glass, λ 70 A small value of means that the glass itself is less colored and has a high light transmittance.

[0082] In some embodiments, the λ of the optical glass of the present invention is 70 485nm or less, preferably λ 70 480nm or less, preferably λ 70 Below 470nm.

[0083] In some embodiments, the λ of the optical glass of the present invention is 5 425nm or less, preferably λ 5 420nm or less, preferably λ 5 Below 410nm.

[0084] <Water resistance stability>

[0085] Water resistance stability of optical glass (D W )(Powder method) Tested according to the method specified in GB / T 17129.

[0086] In some embodiments, the water resistance stability (D W ) is 2 or more, preferably 1.

[0087] <Acid resistance stability>

[0088] Acid resistance stability of optical glass (D A )(Powder method) Tested according to the method specified in GB / T 17129.

[0089] In some embodiments, the acid resistance stability (D A ) is 2 or more, preferably 1.

[0090] <Weather resistance>

[0091] The weather resistance (CR) of optical glass is tested according to the following method.

[0092] The samples were placed in a test chamber with a saturated water vapor environment of 90% relative humidity, and cycled alternately every 1 hour at 40-50°C for 15 cycles. The weather resistance category was divided according to the change in turbidity before and after the samples were placed. Table 1 shows the weather resistance classification.

[0093] Table 1. Weather resistance classification

[0094]

[0095] In some embodiments, the weather resistance (CR) of the optical glass of the present invention is Class 2 or higher, preferably Class 1.

[0096] <Coefficient of Thermal Expansion>

[0097] The thermal expansion coefficient (α -30 / 70℃ )The data of -30~70℃ were tested according to the method specified in GB / T7962.16-2010.

[0098] The thermal expansion coefficient (α -30 / 70℃ ) is 110×10 -7 / K or less, preferably 100×10 -7 / K or less, more preferably 90×10 -7 / K or less.

[0099] <Abrasion>

[0100] Abrasiveness of optical glass (F A ) refers to the value obtained by multiplying the ratio of the wear volume of the sample to the wear volume (volume) of the standard sample (H-K9 glass) under exactly the same conditions by 100, and is expressed by the following formula:

[0101]

[0102] Where: V—volume wear of the sample being tested;

[0103] V 0 —Volume loss of standard sample;

[0104] W—mass wear loss of the sample being tested;

[0105] W 0 —Abrasion loss of standard sample mass;

[0106] ρ—density of the sample being tested;

[0107] ρ 0 —Standard sample density.

[0108] The abrasiveness of the optical glass of the present invention (F A ) is 390 or less, preferably 380 or less, and more preferably 360 or less.

[0109] <Knoop hardness>

[0110] Knoop hardness of optical glass (H K ) Test according to the test method specified in GB / T7962.18-2010.

[0111] In some embodiments, the Knoop hardness (H) of the optical glass of the present invention is K ) is 350×10 7 Pa or more, preferably 360×10 7 Pa or more, more preferably 370×10 7 Pa or more, more preferably 380×10 7 Pa or above.

[0112] [Method for producing optical glass]

[0113] The manufacturing method of the optical glass of the present invention is as follows: the glass of the present invention can be produced by conventional raw materials and processes, including but not limited to using carbonates, nitrates, phosphates, metaphosphates, pyrophosphates, hydroxides, oxides, fluorides, etc. as raw materials. After the materials are prepared according to the conventional method, the prepared furnace materials are put into a melting furnace (such as a platinum or platinum alloy crucible, gold or an alloy crucible containing gold) at 800-1100°C for melting, and after clarification and homogenization, a homogeneous molten glass without bubbles and undissolved substances is obtained, and the molten glass is cast in a mold and annealed.

[0114] The glass of the present invention can also be produced by a secondary smelting method, that is, the mixture of the above raw materials is first put into a quartz, alumina or zirconium crucible for smelting, and after the melting is completed, a clinker is prepared, and then the clinker is put into a platinum or platinum alloy crucible (or a gold or gold-containing alloy crucible) for melting, thereby obtaining the desired high-quality glass.

[0115] Those skilled in the art can appropriately select raw materials, process methods and process parameters according to actual needs.

[0116] [Glass preforms and optical components]

[0117] The prepared optical glass can be used to make a glass preform by means of direct drop molding, grinding, or compression molding such as hot press molding. That is, the molten optical glass can be directly precision drop molded into a glass precision preform, or the glass preform can be made by mechanical processing such as grinding and grinding, or the preform for compression molding made of the optical glass can be made by hot press molding and then grinding. It should be noted that the means for preparing the glass preform are not limited to the above means.

[0118] As described above, the optical glass of the present invention is useful for various optical elements and optical designs, and it is particularly preferred to form a preform from the optical glass of the present invention and use the preform to perform re-hot pressing, precision stamping, etc. to produce optical elements such as lenses and prisms.

[0119] The glass preform and optical element of the present invention are both formed of the optical glass of the present invention. The glass preform of the present invention has the excellent properties of optical glass; the optical element of the present invention has the excellent properties of optical glass, and can provide various optical elements such as lenses and prisms with high optical value.

[0120] Examples of the lens include various lenses having spherical or aspherical lens surfaces, such as a concave meniscus lens, a convex meniscus lens, a biconvex lens, a biconcave lens, a plano-convex lens, and a plano-concave lens.

[0121] [Optical instruments]

[0122] The optical element formed by the optical glass of the present invention can be used to manufacture optical instruments such as photographic equipment, video equipment, projection equipment, display equipment, vehicle-mounted equipment and monitoring equipment.

[0123] Example

[0124] <Optical Glass Example>

[0125] In order to further clearly illustrate and describe the technical solution of the present invention, the following non-limiting examples are provided.

[0126] This embodiment adopts the above optical glass manufacturing method to obtain optical glasses having the compositions shown in Tables 2 to 5. In addition, the properties of each glass are measured by the testing method described in the present invention, and the measurement results are shown in Tables 2 to 5.

[0127] Table 2.

[0128]

[0129]

[0130] Table 3.

[0131]

[0132]

[0133] Table 4.

[0134]

[0135]

[0136] Table 5.

[0137]

[0138]

[0139] <Glass Preform Example>

[0140] The glasses obtained from the optical glass embodiments in Tables 2 to 5 above are used, for example, by grinding processing, or by molding methods such as hot pressing, precision stamping, etc., to make preforms of various lenses, prisms, etc., such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses.

[0141] <Optical Element Embodiment>

[0142] The preforms obtained in the above-mentioned glass preform embodiments are annealed to reduce the internal stress of the glass and fine-tune the refractive index so that the optical properties such as the refractive index reach the desired values.

[0143] Next, each preform is ground and polished to produce various lenses and prisms such as concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, and plano-concave lenses. The surface of the obtained optical element may be coated with an anti-reflection film.

[0144] <Optical Instrument Embodiment>

[0145] The optical element obtained by the above-mentioned optical element embodiment is optically designed to form an optical component or optical assembly by using one or more optical elements, and can be used in, for example, imaging equipment, sensors, microscopes, medical technology, digital projection, communications, optical communication technology / information transmission, optics / lighting in the automotive field, lithography technology, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips.

[0146] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0147] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims, and the description may be used to interpret the content of the claims.

Claims

1. Optical glass, It is characterized in that Its components are expressed in weight percentage and contain: P 2 O 5 :8~22%;Bi 2 O 3 :30~60%; Nb 2 O 5 :15~35%;WO 3 : 3~25%, among which (Nb 2 O 5 +P 2 O 5 ) / WO 3 It is 1.0~15.

0.

2. The optical glass according to claim 1, It is characterized in that Its components, expressed in weight percentage, also contain: TiO 2 :0~10%;and / or B 2 O 3 :0~10%; and / or BaO:0~10%; and / or MgO:0~10%; and / or CaO:0~10%; and / or SrO:0~10%; and / or ZnO:0~10%; and / or Li 2 O: 0~10%; and / or Na 2 O: 0-10%; and / or K 2 O: 0-10%; and / or SiO 2 +Al 2 O 3 +ZrO 2 :0~10%;and / or Ln 2 O 3 :0~10%; and / or TeO 2 :0~5%;and / or GeO 2 :0~5%;and / or Ga 2 O 3 :0~5%;and / or Ta 2 O 5 :0~5%;and / or F:0~5%;and / or clarifier:0~2%,the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

3. Optical glass, It is characterized in that Contains P 2 O 5 , Nb 2 O 5 , WO 3 and Bi 2 O 3 As an essential component, its composition is expressed in weight percentage, among which (Nb 2 O 5 +P 2 O 5 ) / WO 3 The refractive index n of the optical glass is 1.0 to 15.

0. d is 1.92 or more, the Abbe number ν d The CR value is 26 or less, and the weather resistance CR value is 2 or more.

4. The optical glass according to claim 3, It is characterized in that Its components are expressed in weight percentage and contain: P 2 O 5 :8~22%; and / or Bi 2 O 3 :30~60%; and / or Nb 2 O 5 :15~35%;and / or WO 3 :3~25%; and / or TiO 2 :0~10%;and / or B 2 O 3 :0~10%; and / or BaO:0~10%; and / or MgO:0~10%; and / or CaO:0~10%; and / or SrO:0~10%; and / or ZnO:0~10%; and / or Li 2 O: 0~10%; and / or Na 2 O: 0-10%; and / or K 2 O: 0-10%; and / or SiO 2 +Al 2 O 3 +ZrO 2 :0~10%;and / or Ln 2 O 3 :0~10%; and / or TeO 2 :0~5%;and / or GeO 2 :0~5%;and / or Ga 2 O 3 :0~5%;and / or Ta 2 O 5 :0~5%;and / or F:0~5%;and / or clarifier:0~2%,the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

5. Optical glass, It is characterized in that Its components are expressed in weight percentage, consisting of P 2 O 5 :8~22%;Bi 2 O 3 :30~60%; Nb 2 O 5 :15~35%;WO 3 :3~25%;TiO 2 :0~10%; B 2 O 3 : 0~10%; BaO: 0~10%; MgO: 0~10%; CaO: 0~10%; SrO: 0~10%; ZnO: 0~10%; Li 2 O: 0-10%; Na 2 O: 0-10%; K 2 O: 0-10%; SiO 2 +Al 2 O 3 +ZrO 2 :0~10%; Ln 2 O 3 :0~10%;TeO 2 :0~5%;GeO 2 :0~5%;Ga 2 O 3 :0~5%;Ta 2 O 5 :0~5%; F：0～5%； Clarifying agent: 0-2% composition, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

6. The optical glass according to any one of claims 1 to 5, It is characterized in that Its components are expressed in weight percentage, among which: Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.6 to 2.3, preferably Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.7 to 2.0, more preferably Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.8 to 1.5, and Bi 2 O 3 / (Nb 2 O 5 +P 2 O 5 ) is 0.9 to 1.3; and / or (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.0 to 15.0, preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 1.5 to 12.0, more preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 is 2.5 to 10.0, and more preferably (Nb 2 O 5 +P 2 O 5 ) / WO 3 3.0~7.0; and / or (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.3 to 1.3, preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.4 to 1.0, more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 is 0.5 to 0.8, and more preferably (Nb 2 O 5 +TiO 2 ) / Bi 2 O 3 0.55~0.75; and / or (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.5 to 2.5, preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.7 to 2.0, more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 is 0.8 to 1.8, and more preferably (Nb 2 O 5 +WO 3 +TiO 2 +P 2 O 5 ) / Bi 2 O 3 It is 1.0~1.

5.

7. The optical glass according to any one of claims 1 to 5, It is characterized in that Its components are expressed in weight percentage, where: (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.4 to 2.0, preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.5 to 1.5, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.6 to 1.2, and more preferably (Nb 2 O 5 +P 2 O 5 +TiO 2 +BaO) / (Bi 2 O 3 +WO 3 ) is 0.65~1.0; and / or Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.3 to 1.0, preferably Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.4 to 0.9, preferably Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.5 to 0.8, and Na 2 O / (Li 2 O+Na 2 O+K 2 O) is 0.5 to 0.75; and / or: ZnO / (TiO 2 +BaO) is 5.0 or less, preferably ZnO / (TiO 2 +BaO) is 3.0 or less, and more preferably ZnO / (TiO 2 +BaO) is 1.5 or less, and ZnO / (TiO 2 +BaO) is less than 0.8; and / or TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.1 or more, preferably TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.3 or more, and TiO 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.5 to 20.0, and TiO is more preferred 2 / (SiO 2 +Al 2 O 3 +ZrO 2 ) is 0.8 to 10.0; and / or WO 3 / (Li 2 O+Na 2 O+K 2 O) is 0.2 or more, preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 0.5 or more, more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 1.0 to 15.0, and more preferably WO 3 / (Li 2 O+Na 2 O+K 2 O) is 1.5~8.

0.

8. The optical glass according to any one of claims 1 to 5, It is characterized in that Its components are expressed in weight percentage, where: P 2 O 5 : 12~22%, preferably P 2 O 5 :13~19%; and / or Bi 2 O 3 : 35-55%, preferably Bi 2 O 3 :38~50%; and / or Nb 2 O 5 : 18-30%, preferably Nb 2 O 5 :20~28%;and / or WO 3 : 4-20%, preferably WO 3 :6~15%; and / or TiO 2 : 0.5-8%, preferably TiO 2 :1~5%; and / or B 2 O 3 : 0~8%, preferably B 2 O 3 : 0-5%; and / or BaO: 0-6%, preferably BaO: 0-5%; and / or MgO: 0-5%, preferably MgO: 0-3%; and / or CaO: 0-5%, preferably CaO: 0-3%; and / or SrO: 0-5%, preferably SrO: 0-3%; and / or ZnO: 0-6%, preferably ZnO: 0-5%; and / or Li 2 O: 0-5%, preferably Li 2 O: 0~3%; and / or Na 2 O: 0.5-8%, preferably Na 2 O: 1-6%; and / or K 2 O: 0-6%, preferably K 2 O: 0-5%; and / or SiO 2 +Al 2 O 3 +ZrO 2 : greater than 0 but less than or equal to 8%, preferably SiO 2 +Al 2 O 3 +ZrO 2 :0.1~5%; and / or Ln 2 O 3 : 0~5%, preferably Ln 2 O 3 : 0 to 3%, preferably no Ln 2 O 3 ; and / or TeO 2 : 0-3%, preferably TeO 2 : 0-1%, preferably no TeO 2 ; and / or GeO 2 : 0~3%, preferably GeO 2 : 0-1%, preferably no GeO 2 ; and / or Ga 2 O 3 :0~3%, preferably Ga 2 O 3 : 0 to 1%, preferably no Ga 2 O 3 ; and / or Ta 2 O 5 : 0~3%, preferably Ta 2 O 5 : 0 to 1%, preferably no Ta 2 O 5 ; and / or F: 0-3%, preferably F: 0-1%, more preferably no F; and / or clarifier: 0-1%, preferably clarifier: 0-0.5%, the Ln 2 O 3 For La 2 O 3 , Gd 2 O 3 , Y 2 O 3 , Yb 2 O 3 、Lu 2 O 3 One or more of the following, the clarifier is Sb 2 O 3 、SnO、SnO 2 、CeO 2 One or more of .

9. The optical glass according to any one of claims 1 to 5, It is characterized in that The refractive index n of the optical glass d is 1.92 or more, preferably 1.94 or more, more preferably 1.96 to 2.10, and further preferably 1.98 to 2.05; Abbe number ν d It is 26 or less, preferably 24 or less, more preferably 16-22, and further preferably 18-21.

10. The optical glass according to any one of claims 1 to 5, It is characterized in that The acid resistance stability of the optical glass is D A 2 or more, preferably 1; and / or water resistance stability D W is 2 or more, preferably 1; and / or the weather resistance CR is 2 or more, preferably 1; and / or the thermal expansion coefficient α -30 / 70℃ 110×10 -7 / K or less, preferably 100×10 -7 / K or less, more preferably 90×10 -7 / K or below; and / or transition temperature T g 520°C or less, preferably 510°C or less, more preferably 500°C or less, and further preferably 495°C or less; and / or abrasion degree F A 390 or less, preferably 380 or less, more preferably 360 or less; and / or Knoop hardness H K 350×10 7 Pa or more, preferably 360×10 7 Pa or more, more preferably 370×10 7 Pa or more, more preferably 380×10 7 Pa or above; and / or λ 70 485 nm or less, preferably 480 nm or less, more preferably 470 nm or less; and / or λ 5 It is 425 nm or less, preferably 420 nm or less, and more preferably 410 nm or less.

11. Glass preforms, It is characterized in that Made of the optical glass described in any one of claims 1 to 10.

12. Optical components, It is characterized in that The optical glass is made of the optical glass described in any one of claims 1 to 10 or the glass preform described in claim 11.

13. Optical instruments, It is characterized in that Contains the optical glass according to any one of claims 1 to 10, and / or contains the optical element according to claim 12.

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