Title:
光学ガラス
Document Type and Number:
Japanese Patent JP6719611
Kind Code:
B2
Abstract:
An optical glass with high refractive index and low dispersion, having refractive index nd of 1.78-1.95, Abbe number νd of 32-50, and contains no GeO2, so it is not easily devitrified. An optical glass, represented by cation %, including: 1-20% of Si4+; 25-60% of B3+; 10-40% of La3+; 0-15% of Y3+; 0-20% of Nb5+; 0-15% of Ti4+; 0-10% of Ta5+; 0-5% of W6+; 0-15% of Zr4+; 0-10% of Zn2+; 0-10% of Bi3+. An optical glass with excellent transmittance, an optical glass preform and an optical element formed by the above optical glass. The optical element made by the above optical glass and the above glass preform or optical element blank, such as lens, can be used for optical systems.
Inventors:
grandchild great
Application Number:
JP2019045569A
Publication Date:
July 08, 2020
Filing Date:
March 13, 2019
Export Citation:
Assignee:
CHENGDU GUANG MING GUANG DIAN GLASS CO.,LTD.
International Classes:
C03C3/068; G02B1/00; G02B3/00
Domestic Patent References:
| JP2002284542A | ||||
| JP2015030631A | ||||
| JP2015059060A | ||||
| JP2015059064A | ||||
| JP2009143738A | ||||
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| JP2014221704A | ||||
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Foreign References:
| DE3130066A1 | ||||
| WO2010053214A1 | ||||
| WO2013069528A1 |
Attorney, Agent or Firm:
Ken Ieiri