The present invention is related to a laser device to induce a photomechanical effect. More particularly, the present invention relates to a laser system for outputting a pulsed laser beam and inducing a photo-mechanical effect by controlling the energy of the laser beam.

1. Technical Field

The invention is about a laser apparatus that can manage a photomechanical effect and a method for using it. Particularly the laser apparatus is capable of creating a photomechanical effect using a laser beam pulsed, and controlling the energy of the pulse to create the effect.

2. Description of the Related Art

A laser device is an apparatus for emitting the light with the help of light amplifying stimulated emission of radiation.

This laser equipment can produce artificial light with the same phase, direction, wavelength, and phase that is different from the natural light. It is used extensively in many industries that are built around this feature. The laser apparatus is used in numerous industries, including 1) optical communications fields using optical characteristics; 2) medical fields, such as diseases monitoring, low-level laser therapy and photodynamic therapy; 3) a field for the separation of chemical bonds, and 4) high-precision machining fields, like diamond processing.

But, the standard laser is employed to create optical effects, or in the context of photo-chemical or photothermal effects that are produced in a temperature range of 80.degree. C. or more.

There is no research currently underway that can generate a photo-mechanical effect using the laser.

The present invention seeks to create a photomechanical effect by using a laser apparatus.

The present invention also proposes mechanical stimulation to the human body with a laser apparatus.

Another goal of the present invention is to control a photo-mechanical effects induced by a laser.

A preferred embodiment of the present invention is a laser apparatus that emits a pulsed beam laser light and produces a photomechanical effect by the manipulation of energy.

Furthermore the laser apparatus accordance with an embodiment of the invention regulates the energy per pulse of the laser beam that is pulsed for inducing the photo-mechanical effect.

According to the embodiment of the current invention, a laser device is capable of controlling the intensity of each pulse up to a maximum of 0.005mJ.

In addition when using the laser apparatus, in conformity with an embodiment of the present invention, the power per pulse is controlled to a value ranging from 0.005 mJ to 9.5 MJ.

The laser device according to the embodiment of this invention could also be used to apply mechanical stimulation to the human body.

The laser apparatus in an embodiment of this invention manages the energy per pulse by controlling both the power and the width of pulses of laser output lights.

In addition, in the laser apparatus in accordance with an embodiment of the present invention the pulse width is controlled within a range of millisecond (ms) or lower.

Furthermore the laser apparatus accordance with an embodiment of the invention manages the photomechanical effect by controlling the intensity of the laser beam within the state that a radius of the laser beam isconstantly maintained.

Additionally, the laser apparatus in conformity with the embodiment of the present invention can be operated in a manner that photo-mechanical force is increased as well as in a state in which the force generated by photomechanical forces is reduced. The laser apparatus increases energy per pulse of the pulsed laser beam when it is in the mode that photo-mechanical force increased and decreases energy per pulse of the pulsed laser beam when it is in the mode in which photo-mechanical force is reduced.

In addition, the laser apparatus in conformity with the embodiment of the present invention can perform a first operation to maintain a constant output diameter for the laser beam and an additional operation to change an outputdiameter of the pulsed laser beam.

In addition, the laser device as per the embodiment of the present invention continuously maintains a diameter of the pulsed laser beam when the pulsed laser beam reaches a target.

The laser apparatus described in the embodiment of the invention keeps a fixed diameter of the beam once it has reached the intended target. If the distance to the target changes, the output diameter of the beam is adjusted.

Furthermore, the laser apparatus as per an embodiment of the present invention further features a lens unit that allows for changing an output diameter of the pulsed laser beam.

Furthermore, the laser apparatus in accordance with an embodiment of the present invention further includes a distance recognition unit for recognizing a distance from the target, wherein the lens unit is controlled based on distance informationrecognized by the distance recognition unit.

In accordance with another embodiment of the invention the laser apparatus is able to measure distance using ultrasonic waves or infrared radiations.

Meanwhile, a haptic apparatus that is in conformity with an embodiment of the invention is able to output a pulsed laser beam, produce a photo-mechanical effect through controlling energy of the pulsed laser beam, and propose a mechanical sense using thephoto-mechanical effect. The haptic device of an embodiment of the invention controls the photomechanical effect by controlling the energy of the beam’s pulse at a point that the pulsedlaser beam’s size remains constant. The haptic apparatus then regulates the mechanical sense by the control of the photomechanical effects.

Furthermore, a method of inducing a photo-mechanical effect in accordance with an embodiment of the invention includes (a) control, through a laser apparatus, the energy of a pulsed laser beam, (b) radiating the laser beam produced by the laser apparatus towards a target and (c) inducing, by the laser beam that is pulsed at the target, the photo-mechanical effect.

The method of inducing photo-mechanical effects in accordance with an embodiment of this invention controls the energy of the beam pulsed in the condition that the diameter of the pulsed beam is continuously maintained.

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