Method and device for separating optical crystal by using two laser beams

An optical crystal, laser beam technology, applied in laser welding equipment, metal processing equipment, welding equipment and other directions, to achieve the effect of eliminating pollution damage
CN102152003AActive Publication Date: 2011-08-17武汉飞能达激光技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
武汉飞能达激光技术有限公司
Publication Date
2011-08-17

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Abstract

The invention discloses a method and a device for separating an optical crystal by using two laser beams. The method comprises the following steps of: forming a damage section formed by light damage lines in the optical crystal by using a first laser beam with high peak power and low pulse energy; and acting on the damage section formed by the light damage lines by using a second laser beam with low peak power and high pulse energy so as to separate the optical crystal. The device comprises a two-dimensional working table and two sets of laser processing systems; each laser processing system comprises a Z-axis moving mechanism, and a laser, a beam expansion collimating lens, a first reflection lens and a focusing lens which are positioned on the same light path; and the focusing lenses are fixed on the Z-axis moving mechanisms. In the invention, the optical crystal is separated by using the characteristics that a mechanical action force is absent in the mutual action between the laser and the material, and the material is transparent to laser; therefore, aims of no fragmentation, high separating precision, arbitrary direction separation and no pollution during separation of the optical crystal can be fulfilled. The invention is particularly applicable to separation of potassium dihydrogen phosphate (KDP) optical crystals.
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Description

technical field

[0001] The invention belongs to the technical field of laser processing applications, and in particular relates to a method and a device for separating optical crystals with double laser beams. The method is especially suitable for potassium dihydrogen phosphate (KDP) optical crystals. Background technique

[0002] KDP optical crystal is a kind of artificial optical crystal cultivated in aqueous solution, which belongs to tetragonal optical crystal. Optical crystals belonging to this type include ADP (ammonia dihydrogen phosphate), KD * P (dideuterium potassium phosphate) and so on. Potassium dihydrogen phosphate (KDP) is easy to grow into large uniform optical crystals, has high transparency in the wavelength range of 0.2-2.5 μm, and has a high anti-laser damage threshold, so it is widely used in optoelectronic technology and is a high-power The frequency multiplier in the driver and the important material of electro-optic devices have been widely used in ...

Claims

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