Stand-alone scanning laser device
A stand-alone laser device that provides low level laser therapy using one or more laser sources. The laser sources are attached to one or more arms which can be positioned to cause the laser light to impinge on a desired area of a patient's body. A scanning apparatus is attached to the arms which comprise structures that cooperate to cause an optical element to be able to simultaneously rotate about a central axis and move in a linear motion along that axis to achieve any desired scan pattern. Laser light of different pulse widths, different beam shapes and different scan patterns can be applied externally to a patient's body. In the preferred embodiment, red light having a wavelength of about 635 nm is used to stimulate hair growth on a patient's scalp.
1. A laser device comprising:
a) at least one laser energy source for generating a laser beam;
b) a housing from which the laser beam emits;
c) a scanning head connected to the housing positioned to receive the laser beam and configured to direct the laser beam to any location forward of the scanning head, the scanning head comprising:
i. an optical element;
ii. a rotatable rocker carriage comprising a transverse axle on which the optical element is rotatably secured; and
iii. a reciprocating pushrod aligned with the rocker carriage along a central axis and positioned to cooperate with the optical element; and
d) a support structure attached to the housing such that a patient can be scanned by the laser beam without moving the housing.
2. The device according to claim 1 wherein the scanning head further comprises:
a) a main drive gear connected to the rocker carriage such that when the main drive gear rotates, the rocker carriage rotates about the central axis; and
b) a beveled cam abutting the pushrod such that when the beveled cam rotates, the pushrod reciprocates.
3. The device according to claim 1 wherein the pushrod has a tapered leading edge and wherein the scanning head further comprises a spring clip positioned to bias the optical element against the leading edge of the pushrod.
4. The device according to claim 2 wherein the scanning head further comprises a minor drive gear mated to the main drive gear, a first drive motor attached to the minor drive gear, and a second drive motor attached to the beveled cam.
5. The device according to claim 1 wherein the optical element is a prism.
6. The device according to claim 1 wherein the optical element is a mirror.
7. The device according to claim 1 further comprising a scanner control for controlling the optical element.
8. The device according to claim 7 wherein the scanner control controls a shape of a treatment zone.
9. The device according to claim 7 wherein the scanner control controls an energy distribution in a treatment zone.
10. The device according to claim 1 wherein the at least one laser energy source is a semiconductor diode.
11. The device according to claim 10 wherein the laser energy source generates a laser beam having a wavelength in the visible range.
12. The device according to claim 10 wherein the laser energy source generates a laser beam having a wavelength in the red range.
13. The device according to claim 7 further comprising a laser control for controlling a pulse repetition rate of the laser beam.
14. The device according to claim 13 wherein the pulse repetition rate is less than 100,000 Hz.
15. The device according to claim 1 wherein the support structure is an arm attachable to a wall.
16. The device according to claim 1 wherein the support structure is an arm attached to a base that rests on a floor.
17. The device according to claim 1 wherein the support structure is portable.
18. The device according to claim 1 further comprising a shield positioned such that the laser light emitted from the housing is blocked from being reflected or deflected to undesirable locations.