Light beam generation, and focusing and redirecting device

• US 6,951,411 B1
• Filed: 06/15/2000
• Issued: 10/04/2005
• Est. Priority Date: 06/18/1999
• Status: Expired due to Term

• Current Assignee: MidCap Funding III, LLC, ​Passport Technologies, Inc.
• Original Assignee: Altia Technology (Altia Group), Spectro Incorporated (Spectro Scientific, Inc.)
• Inventors: Eppstein, Jonathan A., Hatch, Michael R., Lincoln, Danny F., Kumar, Krishna S.
• Primary Examiner(s): Sember, Thomas M.
• Assistant Examiner(s): Negron, Ismael
• Application Number:
  US10/018,913
• Time in Patent Office: 1,937 Days
• Field of Search: 362/109, 362/116, 362/119, 362/120, 362/157, 362/184, 362/185, 362/187, 362/197, 362/227, 362/232, 362/235, 362/236, 362/237, 362/244, 362/257, 362/259, 362/277, 362/202, 362/284, 362/294, 362/296, 362/282, 362/268, 362/269, 362/271, 362/272, 606/1, 606/2, 606/10, 606/13, 606/17, 606/27, 606 32- 34, 606/167, 606/3, 606/11, 606/37, 606/39, 606/40, 359/196, 359/197, 359/198, 359/209, 359/211, 359/212, 359/216, 359/223, 359/226, 359/831, 372/9, 372/24
• US Class Current: 362/284
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2017/00765 Decreasing the barrier function of skin tissue by radiated energy, e.g. using ultrasound, using laser for skin perforation
• CPC Class Codes: A61B 2018/2025 with a pilot laser
• CPC Class Codes: A61B 2018/20351 Scanning mechanisms
• CPC Class Codes: A61B 2018/20355 Special scanning path or conditions, e.g. spiral, raster or providing spot overlap

Abstract

An improved light beam generation and focusing device (15, 50) has a light source (16, 51) constructed and arranged to emit at least one beam of light (20), and a lens assembly (17, 19, 56) constructed and arranged to focus the at least one beam of light on a surface plane. The device is constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations (21, 21′) on the surface plane. The lens assembly comprises a collimating lens (17), and a spaced focusing lens (19).

Claims

1. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target;

said light source comprising at least two laser diodes mounted on a mounting block and wherein said mounting block includes at least two generally planar walls generally orthogonal to the target locations, and that the spacing between said walls generally fixed the relative spacing between the targets of the diodes.

2. The device of claim 1, comprising a microcontroller coupled to each said laser diode and adapted to sequentially operate each said laser diode with respect to one another for emitting said at least one beam of light and for sequentially directing said at least one beam of light to said at least two spaced locations on the surface plane.

3. The device of claim 1, said mounting block comprising a heat sink mounting block having a first planar surface, a spaced parallel second planar surface, and a plurality of sides adjoining one another and each said planar surface along their respective common edges.

4. The device of claim 3, each of said at least two laser diodes being mounted to a separate one of the sides of said mounting block.

5. The device of claim 3, comprising a separate insulated wire bonding pad on said mounting block for each respective one of said at least two laser diodes.

6. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target;

said light source comprising at least two laser diodes mounted on a mounting block and wherein said mounting block includes at least two generally planar walls generally orthogonal to the target locations, and that the spacing between said walls generally fixed the relative spacing between the targets of the diodes and wherein each of said at least two laser diodes comprising a single active element laser diode chip; and

wherein said light source comprising four spaced laser diodes mounted on a common mounting block and wherein said mounting block includes 4 generally planar walls for defining the relative spacing between said the targets of the diodes.

7. The device of claim 6, each said laser diode chip being spaced approximately eight hundred microns from each adjacent one of said laser diode chips.

8. The device of claim 6, said laser diode chips being spaced apart from one another to form a predetermined pattern of beams of light directed to the surface plane.

9. A light beam generation and focusing device capable of directing at least two separate unsplit focused beams of light at a surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light, said light source comprising at least two laser diodes mounted on a mounting block, said mounting block including a heat sink for cooling said diodes and for creating a fixed spacing therebetween comprising first and second spaced apart planar surfaces upon which said diodes are immovably attached,

a lens assembly constructed and arranged to focus said at the beam of light from each diode on the surface plane; and

said device being constructed and arranged to direct beams of light to at least two apart spaced locations on the surface plane.

10. A light beam generation and focusing device according to claim 9 wherein said mounting block has planar opposing walls and recesses for receiving at least a portion of each diode to actually align their position.

11. A light beam generator and focusing device according to claim 10 further including an insulating portion on said planar surfaces between said heat sink and said diodes.

12. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target, said device being constructed and arranged to sequentially direct the beam of light to at least four spaced locations on the surface plane in a predetermined pattern and wherein, each of the at least four spaced locations on the surface plane being spaced approximately eight hundred microns from each adjacent one of said at least four spaced locations thereon.

13. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target;

said light source and said lens assembly being fitted within a housing sized and shaped to fit in the hand of a device user and wherein, said light source comprising at least two laser diodes mounted to a mounting block positioned within said housing and wherein said mounting block includes at least two generally planar walls generally orthogonal to the target locations, and that the spacing between said walls generally fixed the relative spacing between targets of the diodes.

14. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target;

said light source and said lens assembly being fitted within a housing sized and shaped to fit in the hand of a device user and said light source comprising at least two laser diodes mounted to a mounting block positioned within said housing and wherein said mounting block includes at least two generally planar walls generally orthogonal to the target locations, and that the spacing between said walls generally fixed the relative spacing between targets of the diodes and further comprising a controller coupled to each of said at least two laser diodes and adapted to sequentially operate each said laser diode with respect to the other for directing the beam of light to said at least two spaced locations on the surface plane.

15. A light beam generation and focusing device for directing at least one focused beam of light at a target surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane including at least one rotating wedge interposed in the path of said light beam capable of redirecting the beam to multiple locations and actuate said light beam when said wedge is in position to direct the beam to said target;

said light source comprising at least two laser diodes mounted on a mounting block and wherein said mounting block includes at least two generally planar walls generally orthogonal to the target locations, and that the spacing between said walls generally fixed the relative spacing between the targets of the diodes;

said light source comprising four spaced laser diodes mounted on a common mounting block and wherein said mounting block includes 4 generally planar walls for defining the relative spacing between said the targets of the diodes.

16. A method of reliably generating focused light beams directed to a surface plane at a predetermined distance from each other, comprising:

a) fixing the location on multiple light beam sources on a rigid heat sinking material;

b) emitting at multiple light beams;

c) passing the beams of light through a lens assembly and focusing said at least one beam of light on the surface plane in response thereto; and

d) sequentially directing each beam of light to a plurality of spaced locations on the surface plane,

e) sequentially directing the at least one beam of light to at least four spaced locations on the surface plane in a predetermined pattern

f) directing a beam of light to each of said at least two spaced locations on the surface plane so that each said location is spaced approximately eight hundred microns from each adjacent one of said spaced locations.

17. A light beam generation and focusing device for directing at least one focused beam of light at a surface plane, said device comprising:

a light source constructed and arranged to emit at least one beam of light, said light source comprising at least two laser diodes mounted on a mounting block, said mounting block comprising a copper mounting block having a first planar surface, a spaced parallel second planar surface, and a plurality of sides adjoining one another and each said planar surface along their respective common edges,

said mounting block including a separate insulated wire bonding pad on said mounting block for each respective one of said at least two laser diodes; and

a lens assembly constructed and arranged to focus said at least one beam of light on the surface plane;

said device being constructed and arranged to sequentially direct the at least one beam of light to at least two spaced locations on the surface plane.