Laser perforation device and laser perforation method
View Patent ↗A laser perforation device that has a simple structure and with which pain to a person in skin perforation is reduced. In the device, a laser beam emitted from a laser emitting device is branched into laser beam paths by splitters and mirrors and pierces skin by applying the split beams to the same position on the skin. Since the skin is pierced by a laser beam with a low output, pain to the person can be reduced.
1. A laser perforation apparatus that perforates skin using a laser, the apparatus comprising:
a laser light source that emits a laser light; and
a laser output controller that controls division of a laser output from the laser light source such that a plurality of laser lights are emitted to a same perforated position in one perforation operation,
wherein the laser output controller comprises a laser light branch that branches the laser light emitted from the laser light source into a plurality of optical paths of different optical lengths and focuses the plurality of optical paths branched from the laser light on the same perforated position, the plurality of optical paths being separate until the plurality of optical paths reach the same perforated position,
the laser light branch comprises a total reflection mirror that totally reflects an incident light and a splitter that transmits part of the incident light and reflects the rest of the incident light,
at least one of the total reflection mirror and the splitter comprises a cubic optical device,
the total reflection mirror and the splitter are positioned at predetermined angles with respect to the incident light such that the plurality of optical paths branched from the laser light reach the same perforated position in an order determined based on an optical length of each of the plurality of optical paths.
2. The laser perforation apparatus according to claim 1 wherein all or part of the total reflection mirror and the splitter is configured as one cubic optical device.
3. The laser perforation apparatus according to claim 1 wherein the laser light branch comprises an optical fiber.
4. The laser perforation apparatus according to claim 1 wherein the plurality of optical paths branched from the laser light have a same intensity.
5. The laser perforation apparatus according to claim 1 , wherein the laser light source emits the laser light to the skin obliquely.
6. The laser perforation apparatus according to claim 1 , wherein the plurality of optical paths do not overlap each other after the plurality of optical paths are branched from the laser light until the plurality of optical paths reach the same perforated position.
7. The laser perforation apparatus according to claim 1 , wherein the total reflection mirror and the splitter are positioned to make the plurality of optical paths incident on the same perforated position from different directions.
8. The laser perforation apparatus according to claim 1 , wherein the total reflection mirror and the splitter provided in the plurality of optical paths, and positioned closest to the same perforated position, are separate elements.