Optical glass and optical apparatus using the same
View Patent ↗An optical glass contains a substance A generating light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B generating light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 when a relation between the wavelength λ 1 and the wavelength λ 2 and the wavelength λ 3 is assumed to be λ 1<λ2<λ3 with respect to 100% of basic glass composition containing 2-10% of SiO 2 , 5-45% of B 2 O 3 , and 30-60% of La 2 O 3 or further containing 0-15% of RO(R=Zn, Sr, Ba), 0-40% of Ln 2 O 3 (Ln=Y, Gd), and 0-30% of ZrO 2 +Nb 2 O 5 +Ta 2 O 5 , and the substance B generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
1. An optical glass comprising a basic glass composition that contains, at least:
SiO 2
2-10%
B 2 O 3
5-45%, and
La 2 O 3
30-60%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
2. An optical glass comprising a basic glass composition that contains:
SiO 2
2-10%,
B 2 O 3
5-45%,
La 2 O 3
30-60%,
RO(R = Zn, Sr, Ba)
0-15%,
Ln 2 O 3 (Ln = Y, Gd)
0-40%, and
ZrO 2 + Nb 2 O 5 + TiO 2 + Ta 2 O 5
0-30%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
3. An optical glass comprising a basic glass composition that contains, at least:
SiO 2
2-20%,
B 2 O 3
5-45%, and
La 2 O 3
10-29%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
4. An optical glass comprising a basic glass composition that contains:
SiO 2
2-20%,
B 2 O 3
5-45%,
La 2 O 3
10-29%,
RO(R = Zn, Sr, Ba)
0-45%,
Ln 2 O 3 (Ln = Y, Gd)
0-10%, and
ZrO 2 + Nb 2 O 5 + TiO 2 + Ta 2 O 5
1-20%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
5. An optical glass comprising a basic glass composition that contains, at least:
SiO 2
3-20%,
B 2 O 3
15-40%, and
La 2 O 3
15-45%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
6. An optical glass comprising a basic glass composition that contains, at least:
SiO 2
3-20%,
B 2 O 3
15-40%,
La 2 O 3
15-45%,
Al 2 O 3
0.1-5%,
RO(R = Zn, Sr, Ba)
1-60%,
Ln 2 O 3 (Ln = Y, Gd)
0-10%,
and
ZrO 2 + Nb 2 O 5 + TiO 2 + Ta 2 O 5
0-10%
by weight,
wherein the optical glass further comprises a substance A that generates light of a wavelength λ 2 when irradiated with light of a wavelength λ 1 and a substance B that generates light of a wavelength λ 3 when irradiated with light of the wavelength λ 1 , where λ 1 <λ 2 <λ 3 , and
wherein the substance B is Cr and generates fluorescent light with the wavelength λ 3 of 650 nm or more when excited at the wavelength λ 1 of 550 nm or less.
7. The optical glass according to claim 1 , wherein a Cr content is 5-60 ppm.
8. An optical glass comprising:
Cr
5-60 ppm
with respect to a 100% of basic glass composition that contains, at least:
SiO 2
2-10%
B 2 O 3
5-45%, and
La 2 O 3
30-60%
by weight.
9. An optical glass comprising:
Cr 5-60 ppm
with respect to a 100% of basic glass composition that contains:
SiO 2
2-10%
B 2 O 3
5-45%
La 2 O 3
30-60%
RO (R = Zn, Sr, Ba)
0-15%
Ln 2 O 3 (Ln = Y, Gd)
0-40%, and
ZrO 2 + Nb 2 O 5 + Ta 2 O 5
0-30%
by weight.
10. An optical glass comprising:
Cr
5-60 ppm
with respect to a 100% of basic glass composition that contains, at least:
SiO 2
2-10%,
B 2 O 3
5-45%, and
La 2 O 3
10-29%
by weight.
11. An optical glass comprising:
Cr
5-60 ppm
with respect to a 100% of basic glass composition that contains:
SiO 2
2-20%,
B 2 O 3
5-45%,
La 2 O 3
10-29%,
RO(R = Zn, Sr, Ba)
0-45%,
Ln 2 O 3 (Ln = Y, Gd)
0-10%, and
ZrO 2 + Nb 2 O 5 + TiO 2 + Ta 2 O 5
1-20%
by weight.
12. An optical glass comprising:
Cr
5-60 ppm
with respect to a 100% of basic glass composition that contains, at least:
SiO 2
3-20%,
B 2 O 3
15-40%, and
La 2 O 3
15-45%
by weight.
13. An optical glass comprising:
Cr
5-60 ppm
with respect to a 100% of basic glass composition that contains, at least:
SiO 2
3-20%,
B 2 O 3
15-40%,
La 2 O 3
15-45%,
Al 2 O 3
0.1-5%,
RO(R = Zn, Sr, Ba)
1-60%,
Ln 2 O 3 (Ln = Y, Gd)
0-10%, and
ZrO 2 + Nb 2 O 5 + TiO 2 + Ta 2 O 5
0-10%
by weight.
14. The optical glass according to claim 1 , further comprising 0.01-1% of at least one of Sb 2 O 3 , chloride, sulfide, and fluoride, by weight, as an antifoaming agent, with respect to the 100% of basic glass composition.
15. The optical glass according to claim 1 , further comprising 0-10% of at least one of Li 2 O, Na 2 O, K 2 O, Rb 2 O, and Cs 2 O, by weight.
16. The optical apparatus provided with an optical system having the optical glass according to any one of claims 1 to 13 .