Method for producing an optical component, optical component produced according to the method and devices comprising such components
An optical component having a diffractive element and/or refractive element is provided. The optical component includes a photosensitive glass and/or a photosensitive glass ceramic and a plurality of structures influencing propagation of light in at least a part of the photosensitive glass and/or a photosensitive glass ceramic.
1. An optical component comprising:
a first optical element including a first photosensitive glass having a first transformation temperature and a plurality of structures, the plurality of structures influencing light propagation; and
a second optical element having a second glass having a second transformation temperature, the first transformation temperature having a higher value than the second transformation temperature,
the first photosensitive glass and the second glass being formed as a single composite element by heating the second optical element to a temperature above the second transformation temperature but below the first transformation temperature and to a temperature at which the second glass has a viscosity of less than 10 10 dPa·s and then pressing the first and second optical elements together with a pressure above atmospheric pressure while the second element has the viscosity of less than 10 10 dPa·s.
2. The optical component as claimed in claim 1 , wherein the plurality of structures are formed by blank pressing followed by photostructuring.
3. The optical component according to claim 1 , wherein the first photosensitive glass has a blank pressed surface.
4. The optical component as claimed in claim 1 , wherein the first photosensitive glass has refractive index changes.
5. The optical component as claimed in claim 1 , wherein the first photosensitive glass has a surface produced by pressing under the action of heat, and wherein the plurality of structures are produced by exposure.
6. The optical component as claimed in claim 1 , wherein the first photosensitive glass comprises an oxidic glass that has a transmission band in at least a portion of a visible spectral range.
7. The optical component as claimed in claim 1 , wherein the first photosensitive glass comprises a chalcogenide glass that has a transmission band in at least a portion of an infrared spectral range.
8. The optical component as claimed in claim 1 , wherein the first photosensitive glass comprises photosensitive alkali aluminosilicate glass.
9. The optical component as claimed in claim 8 , wherein the first photosensitive glass is doped with Ag 2 O and CeO 2 .
10. The optical component as claimed in claim 8 , wherein the first photosensitive glass comprises the following composition in weight percent:
SiO 2
20 to 80;
Ag 2 O
0.01 to 0.4;
CeO 2
0.01 to 0.4;
Sb 2 O 3
0 to 1;
B 2 O 3
0 to 5;
Al 2 O 3
3 to 25;
Li 2 O
0 to 15;
Na 2 O
1 to 25;
K 2 O
0 to 5;
ZnO
1 to 10;
MgO
0 to 5;
CaO
0 to 5;
BaO
0 to 10;
Br 2
0 to 5;
F 2
0 to 5;
P 2 O 5
0 to 7;
ZrO 2
0 to 10;
As 2 O 3
0 to 2;
TiO 2
0 to 5;
Gd 2 O 3
0 to 20;
La 2 O 3
0 to 12; and
Ta 2 O 5
0 to 15.
11. The optical component as claimed in claim 8 , wherein the first photosensitive glass comprises the following composition in weight percent:
SiO 2
53 to 72;
Ag 2 O
0.02 to 0.2;
CeO 2
0.02 to 0.06;
Sb 2 O 3
0 to 0.6;
B 2 O 3
0 to 3;
Al 2 O 3
4 to 20;
Li 2 O
0 to 10;
Na 2 O
1 to 20;
K 2 O
0 to 5;
ZnO
1 to 10;
MgO
0 to 5;
CaO
0 to 4;
BaO
0 to 8;
Br 2
0 to 5;
F 2
0 to 4;
P 2 O 5
0 to 5;
ZrO 2
0 to 6;
As 2 O 3
0 to 2;
TiO 2
0 to 4;
Gd 2 O 3
0 to 18;
La 2 O 3
0 to 10; and
Ta 2 O 5
0 to 13.
12. The optical component as claimed in claim 8 , wherein the first photosensitive glass comprises the following composition in weight percent:
SiO 2
55 to 70;
Ag 2 O
0.03 to 0.1;
CeO 2
0.02 to 0.04;
Sb 2 O 3
0 to 0.6;
B 2 O 3
0 to 3;
Al 2 O 3
4 to 12;
Li 2 O
0 to 6;
Na 2 O
1 to 17;
K 2 O
0 to 4;
ZnO
1 to 10;
MgO
0 to 4;
CaO
0 to 4;
BaO
0 to 6;
Br 2
0 to 4;
F 2
0 to 3;
P 2 O 5
0 to 4;
ZrO 2
0 to 5;
As 2 O 3
0 to 2;
TiO 2
0 to 3;
Gd 2 O 3
0 to 15;
La 2 O 3
0 to 8; and
Ta 2 O 5
0 to 10.
13. The optical component as claimed in claim 8 , further comprises sensitizers and/or activators for photostructuring.
14. The optical component as claimed in claim 8 , wherein the first photosensitive glass further comprises photosensitive elements selected from the group consisting of Cu, Ag, Au, and Ce 3+ .
15. The optical component as claimed in claim 8 , wherein the first photosensitive glass further comprises halides for photostructuring selected from group consisting of F, Br, Cl, and I.
16. The optical component as claimed in claim 1 , wherein the first photosensitive glass has a refractive index modulation of at least 10 −4 .
17. The optical component as claimed in claim 16 , wherein the refractive index modulation is generated by a process selected from the group consisting of laser structuring, UV laser structuring, and fs IR laser structuring.
18. The optical component as claimed in claim 1 , further comprising a fast axis collimating lens and a first diffractive optical element, wherein said first diffractive optical element is defined at least in part by a refractive index modulation of the first photosensitive glass.
19. The optical component as claimed in claim 18 , wherein the fast axis collimating lens comprises a cylinder lens having a refractive optical element.
20. The optical component as claimed in claim 19 , further comprising a second diffractive optical element arranged on the refractive optical element.
21. The optical component as claimed in claim 20 , wherein the second diffractive optical element is arranged in a plane lying opposite a refractive surface of the refractive optical element.
22. The optical component as claimed in claim 21 , wherein the first and/or second diffractive elements together with the refractive surface defines an aspherical cylinder lens.
23. The optical component as claimed in claim 19 , further comprising a diffractive element for the production of a multi-lens imaging system.
24. The optical component as claimed in claim 18 , wherein the fast axis collimating lens comprises a cylinder lens having an aspherical surface.
25. The optical component as claimed in claim 24 , wherein the cylinder lens is a fast axis collimating lens assigned to at least one semiconductor laser in a semiconductor array.