Connection unit and laser oscillating apparatus having the same

1. A laser oscillation device, comprising:

an oscillation unit oscillating a laser;

a shutter unit covering the laser; and

a connection unit covering the laser, connecting the oscillation unit and the shutter unit, and comprising a first connection part supported by the oscillation unit and a second connection part supported by the shutter unit,

the first and second connection parts being separated from each other with a space between the first and second parts, and one of the first and second connection parts covering at least a portion of the other one of the first and second connection parts,

wherein the first and second connection parts do not come in contact with each other with no intervening structure or material between the first and second connection parts,

wherein the first connection part comprises a first extension portion extending in a first cylindrical shape from the oscillation unit toward the shutter unit, and the second connection part comprises a second extension portion extending from the shutter unit to an interior of the first extension portion, and having a second cylindrical shape with a smaller diameter than that of the first extension portion in the first cylindrical shape, and

wherein the first connection part further comprises a first bent portion bent to extend from an end portion of the first extension portion toward the second extension portion, and the second connection part further comprises a second bent portion bent to extend from an end portion of the second extension portion toward the first extension portion, wherein the first and second bent portions face each other.

2. The device of claim 1 , further comprising an optical unit connected with the shutter unit and changing a light path of the laser.

3. The device of claim 2 , further comprising:

a first support supporting the oscillation unit; and

a second support supporting at least one of the shutter unit and the optical unit,

the first and second supports being separated from each other.

4. The device of claim 3 , wherein the first and second connection parts have shapes that structurally correspond to each other.

5. The device of claim 4 , wherein,

the first connection part comprises a third extension portion extending in a third cylindrical shape from the oscillation unit toward the shutter unit, and

the second connection part comprises a fourth extension portion extending from the shutter unit toward the third extension portion to cover the third extension portion and having a fourth cylindrical shape with a larger diameter than that of the third extension portion in the third cylindrical shape.

6. A laser oscillation device, comprising:

an oscillation unit oscillating a laser;

a shutter unit covering the laser;

a connection unit covering the laser, connecting the oscillation unit and the shutter unit, and comprising a first connection part supported by the oscillation unit and a second connection part supported by the shutter unit, the first and second connection parts being separated from each other with a space between the first and second parts, and one of the first and second connection parts covering at least a portion of the other one of the first and second connection parts, the first and second connection parts do not come in contact with each other with no intervening structure or material between the first and second connection parts;

an optical unit connected with the shutter unit and changing a light path of the laser

a first support supporting the oscillation unit; and

a second support supporting at least one of the shutter unit and the optical unit, the first and second supports being separated from each other,

wherein the first and second connection parts have shapes that structurally correspond to each other,

wherein the first connection part comprises a third extension portion extending in a third cylindrical shape from the oscillation unit toward the shutter unit, and the second connection part comprises a fourth extension portion extending from the shutter unit toward the third extension portion to cover the third extension portion and having a fourth cylindrical shape with a larger diameter than that of the third extension portion in the third cylindrical shape, and

wherein the first connection part further comprises a third bent portion bent to extend from an end portion of the third extension portion toward the fourth extension portion, and the second connection part further comprises a fourth bent portion bent to extend from an end portion of the fourth extension portion toward the third extension portion, wherein the third and fourth bent portions face each other.

7. A laser oscillation device, comprising:

an oscillation unit oscillating a laser;

a shutter unit covering the laser;

a connection unit covering the laser, connecting the oscillation unit and the shutter unit, and comprising a first connection part supported by the oscillation unit and a second connection part supported by the shutter unit, the first and second connection parts being separated from each other with a space between the first and second parts, and one of the first and second connection parts covering at least a portion of the other one of the first and second connection parts, the first and second connection parts do not come in contact with each other with no intervening structure or material between the first and second connection parts;

an optical unit connected with the shutter unit and changing a light path of the laser

a first support supporting the oscillation unit; and

a second support supporting at least one of the shutter unit and the optical unit, the first and second supports being separated from each other,

wherein the first and second connection parts have shapes that structurally correspond to each other, and

wherein the first and second connection parts extend in a stepwise fashion.

8. The device of claim 1 , wherein the laser is an excimer layer.

9. The device of claim 8 , wherein the laser is used to crystallize silicon.