Laser optical system for liquid crystal display device
View Patent ↗A laser beam optical system for an LCD device includes a laser light source, a variable attenuator for controlling an intensity of a laser light from the laser light source, a telescope lens for gathering the laser light having the controlled intensity from the variable attenuator in the length and width directions, a beam homogenizer including a filter for controlling a sectional profile of the laser light from the telescope lens vertical to the length direction, a condenser for focusing the laser light from the beam homogenizer, and a target to which the laser light is irradiated.
1. A laser optical system for a liquid crystal display device, comprising:
a laser light source;
a variable attenuator for controlling an intensity of a laser light from the laser light source;
a telescope lens for gathering the laser light having the controlled intensity from the variable attenuator in the length and width directions;
a beam homogenizer, including a filter arranged inside the beam homogenizer, for controlling a sectional profile of the laser light from the telescope lens vertical to the length direction;
a condenser for focusing the laser light from the beam homogenizer; and
a target to which the laser light is irradiated.
2. The laser optical system of claim 1 , wherein the telescope lens comprises a first telescope lens, and a second telescope lens facing the first telescope lens.
3. The laser optical system of claim 1 , wherein the beam homogenizer comprises a short axis optical homogenizer and a long axis optical homogenizer.
4. The laser optical system of claim 3 , wherein the short axis optical homogenizer comprises a first short axis optical homogenizer, a second short axis optical homogenizer and a short axis optical condenser lens.
5. The laser optical system of claim 3 , wherein the long axis optical homogenizer comprises a first long axis optical homogenizer, a second long axis optical homogenizer and a long axis optical condenser lens.
6. The laser optical system of claim 3 , wherein the filter is arranged between the short axis optical homogenizer and the long axis optical homogenizer.
7. The laser optical system of claim 1 , wherein the filter comprises:
a frame having a laser transmission region;
at least one beam interception string across the laser transmission region;
at least a pair of first micrometers for controlling the positions of the beam interception strings;
a support member on which at least one first micrometer is formed; and
a second micrometer for controlling the position of the support member.
8. The laser optical system of claim 7 , wherein the beam interception strings are different in thickness.
9. The laser optical system of claim 8 , wherein the thickness of the beam interception strings ranges from 0.05 (mm) to 3 (mm).
10. The laser optical system of claim 7 , wherein the first micrometers are movable on the support member.
11. The laser optical system of claim 7 , wherein the beam interception strings are formed by a metal material.
12. The laser optical system of claim 11 , wherein the beam interception strings are formed by stainless steel.
13. The laser optical system of claim 1 , wherein the target is a substrate of the liquid crystal display device.
14. A laser optical system for a liquid crystal display device, comprising:
a laser light source;
a variable attenuator for controlling an intensity of a laser light from the laser light source;
a telescope lens, including a filter arranged inside the telescope lens, for gathering the laser light having the controlled intensity from the variable attenuator in the length and width directions;
a beam homogenizer for controlling a sectional profile of the laser light from the telescope lens vertical to the length direction;
a condenser for focusing the laser light from the beam homogenizer; and
a target to which the laser light is irradiated.
15. The laser optical system of claim 14 , wherein the telescope lens comprises a first telescope lens, and a second telescope lens facing the first telescope lens.
16. The laser optical system of claim 15 , wherein the filter is arranged between the first telescope lens and the second telescope lens.
17. The laser optical system of claim 14 , wherein the beam homogenizer comprises a short axis optical homogenizer and a long axis optical homogenizer.
18. The laser optical system of claim 17 , wherein the short axis optical homogenizer comprises a first short axis optical homogenizer, a second short axis optical homogenizer and a short axis optical condenser lens.
19. The laser optical system of claim 17 , wherein the long axis optical homogenizer comprises a first long axis optical homogenizer, a second long axis optical homogenizer and a long axis optical condenser lens.
20. The laser optical system of claim 14 , wherein the filter comprises:
a frame having a laser transmission region;
at least one beam interception string across the laser transmission region;
at least a pair of first micrometers for controlling the positions of the beam interception strings;
a support member on which at least one first micrometer is formed; and
a second micrometer for controlling the position of the support member.
21. The laser optical system of claim 20 , wherein the beam interception strings are different in thickness.
22. The laser optical system of claim 21 , wherein the thickness of the beam interception strings ranges from 0.05 (mm) to 3 (mm).
23. The laser optical system of claim 20 , wherein the first micrometers are movable on the support member.
24. The laser optical system of claim 20 , wherein the beam interception strings are formed by a metal material.
25. The laser optical system of claim 24 , wherein the beam interception strings are formed by stainless steel.
26. The laser optical system of claim 20 , wherein the filter is formed between the pair of first telescope lenses and the second telescope lens.
27. The laser optical system of claim 14 , wherein the target is a substrate of the liquid crystal display device.