Optical glass, optical element and optical glass material
A technology of optical glass and raw materials, applied in optical components, optics, instruments, etc., can solve problems such as poor crystallization of molded products, and achieve the effect of excellent thermal stability
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no. 1 Embodiment approach
[0050] In this embodiment, the optical glass of this invention is demonstrated based on the content rate of each component represented by mass % as a 1st viewpoint of this invention. In the first embodiment, unless otherwise specified, each content is represented by mass %.
[0051] Optical glass
[0052] The optical glass of the first embodiment is P 2 o 5 , B 2 o 3 and Al 2 o 3 The total content of [P 2 o 5 +B 2 o 3 +Al 2 o 3 ] is 55% by mass or less of glass, characterized in that it contains: BaO, any one or more selected from MgO, CaO, ZnO and SrO, and selected from Gd 2 o 3 , Y 2 o 3 , La 2 o 3 and Yb 2 o 3 Any one or more of any one or more, the ZnO content is 15% by mass or less, and the mass ratio α1 [BaO / (MgO+CaO+ZnO+SrO)] of the BaO content to the total content of MgO, CaO, ZnO, and SrO is 2.1 or less , P 2 o 5 , B 2 o 3 and Al 2 o 3 The total content of Gd relative to 2 o 3 , Y 2 o 3 , La 2 o 3 and Yb 2 o 3 The mass ratio of the ...
no. 2 Embodiment approach
[0138] In this embodiment, as a 2nd viewpoint of this invention, the optical glass of this invention is demonstrated based on the content rate of each component represented by cation %. In the second embodiment, unless otherwise specified, each content is represented by cation %.
[0139] In the present invention, the cation % represents the ratio of individual cations to all the cations contained in the glass in mole percent. In addition, the optical glass of the present invention is an oxide glass, so the anions are mainly oxygen (O 2- ), but a part may also be substituted by anion other than oxygen (such as halogen).
[0140] Optical glass
[0141] The optical glass of the second embodiment is P 5+ , B 3+ and Al 3+ The total content of [P 5+ +B 3+ +Al 3+ ] is an oxide glass of 60% or less, characterized in that it contains Ba 2+ , selected from Mg 2+ , Ca 2+ , Zn 2+ and Sr 2+ Any one or more of and selected from Gd 3 + , Y 3+ , La 3+ and Yb 3+ Any one or...
Embodiment 1A and comparative example 1A
[0223] Tables 1-4 have shown the optical glass (samples 1A-37A) of the Example of 1st Embodiment of this invention, and Table 5 has shown the optical glass (sample 38A) of the comparative example of this invention. In addition, the samples 11A and 13A shown in Table 5 are the same as the samples shown in Table 2, and are described together for the comparison of an Example and a comparative example.
[0224] These optical glasses were produced according to the following procedures, and various evaluations were performed. The results are shown in Tables 1-5.
[0225] [Manufacture of optical glass]
[0226] First, prepare oxides, hydroxides, carbonates, and nitrates corresponding to the constituent components of glass as raw materials, and weigh the above raw materials so that the glass composition of the obtained optical glass becomes the glass composition shown in each table. , Modulation, fully mix the raw materials. The preparation raw material (batch raw material) obtaine...
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Abstract
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