Modular interchangeable laser system

• US 4,979,180 A
• Filed: 11/24/1989
• Issued: 12/18/1990
• Est. Priority Date: 11/24/1989
• Status: Expired due to Fees

• Current Assignee: Arthur M. Muncheryan
• Original Assignee: Arthur M. Muncheryan
• Inventors: Muncheryan, Arthur M.
• Primary Examiner(s): Scott, Jr., Leon
• Application Number:
  US07/440,725
• Time in Patent Office: 389 Days
• Field of Search: 372/66, 372/69, 372/71, 372/75, 372/107, 372/108, 372/109
• US Class Current: 372/92
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 18/22 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
• CPC Class Codes: A61B 2018/2065 Multiwave; Wavelength mixing, e.g. using four or more wavelengths pilot laser A61B2018/2025
• CPC Class Codes: A61C 1/0046 Dental lasers surgical lasers A61B18/20; working by laser beam in general B23K26/00; lasers per se H01S3/00
• CPC Class Codes: B23K 26/02 Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
• CPC Class Codes: G02B 6/421 the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
• CPC Class Codes: H01S 3/025 of solid state lasers, e.g. housings or mountings
• CPC Class Codes: H01S 3/061 with elliptical or circular cross-section and elongated shape, e.g. rod
• CPC Class Codes: H01S 3/093 focusing or directing the excitation energy into the active medium
• CPC Class Codes: H01S 3/09415 the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
• CPC Class Codes: H01S 3/109 Frequency multiplication, e.g. harmonic generation

Abstract

A modular interchangeable laser instrumentation system for applications in industrial processing, medical surgery and treatment, dental treatment, metrology, military applications, forensic investigation, micromachining, optical storage, spectroscopy, research and many other related applications. The system principally comprises a handheld stylus with interchangeable modules to produce various selected laser-radiation beams for any particular work as needed. Each module and the combined modular stylus is adapted to produce a particular type of laser beam for the intended project in hand, and as the modular section of one stylus is replaced by the modular section of another stylus, the generated laser beam assumes a different optical and spectral character, so as to be compatible with the work under process and characterized by the type of material and thickness thereof, texture, or human anatomical tissue of one kind or another, requiring different focus intensities and modal formats. In short, the laser system is a universal, operational device for use in numerous applications now requiring various specific laser systems to accomplish them.

Claims

1. A modular interchangeable laser system, comprising a modular housing means provided therein with an interchangeable radiation source energized by an electric current supply means having a current-control means and a radiation-generator control means independently operable by a double-throw switch means disposed in said housing said modular housing means having a radiation outlet means and a current outlet means being positioned side by side in one wall thereof and respectively connected to a radiation-conduit means and to a current-carrying conduit means, with said current outlet means being in electrical contact with said electric current supply means;

said current-carrying conduit means provided with coupling means adapted to be connected to one end of a handheld modular stylus having therein a laser beam-generating and amplifying means energized by the current from said current-carrying conduit means, and a laser-beam spectrum modifying means disposed therein in the path of the laser beam emitted by the laser beam-generating means to modify and project said laser beam to the exterior of said modular stylus;

said radiation conduit means being in optical connection at one end thereof with said interchangeable radiation source, through said radiation outlet means and at the other end being adapted with means to be connected to a modular section of a modular stylus to form a unitary laser system theretogether;

a peripheral spacing within each of said conduits and in said modular stylus adapted to receive a gaseous element from an external source connected to said conduits for transmittal of said gaseous element through either of said conduits into said modular stylus for conduction therethrough to the exterior thereof during laser-processing a workpiece.

2. A modular interchangeable laser system as defined in claim 1, wherein said interchangeable radiation source is a laser generator consisting of a solid-state laser-emitting element optically pumped by a radiant means disposed therein for optical excitation of said element.

3. A modular interchangeable laser system as described in claim 2, wherein said solid-state laser-emitting element is one of the laser-generating rods selected from the group consisting of neodymium-YAG, neodymium-glass, alexandrite, titanium-sapphire, ruby, and erbium-YAG.

4. A modular interchangeable laser system as described in claim 2, wherein said radiant means is an electric flashlamp selected from the group consisting of a nitrogen discharge tube, argon-ion laser, and a thermoinic light source.

5. A modular interchangeable laser system as described in claim 2, wherein said radiant means is a semiconductor laser diode selected from the group consisting of aluminum-gallium-arsenide, gallium-arsenide, gallium-aluminum-arsenide-phosphide, and their derivatives.

6. A modular interchangeable laser system as described in claim 1, wherein said modular housing is adapted with means to receive the coupling of a fiberoptic cable for attachment thereof to said means and to transmit into said fiberoptic cable a laser radiation produced by a laser-beam generator disposed in said modular housing for transmission of said laser-beam radiation from said cable to the site of a human anatomical organ through a small-diameter optical fiber continuous with said fiberoptic cable and projecting beyond the sheathing of the fiber-optic cable for several centimeters therefrom.

7. A modular interchangeable laser system as described in claim 6, wherein said modular housing contains a removable Q-switching means and a replaceable modular harmonic generator, both of which are optically connected to the laser-beam generator disposed therein and are adapted with means to be removable whereby only the laser beam from said laser-beam generator is available to the optical fiber in the fiberoptic cable attached to said modular housing for transmission of said laser beam to a workpiece located externally to said modular housing.

8. A modular interchangeable laser system as defined in claim 1, wherein said electric current supply means is a source of rectified direct current originated from a 110-volt alternating current furnished into the rectifier of the modular housing from a conventional power source.

9. A modular interchangeable laser system as defined in claim 1, wherein said current-control means is a double-throw switch means to channel the electric current to two different circuit channels therein, one of which channels being a power transmission means and the other channel being a radiation transmission means.

10. A modular interchangeable laser system as defined in claim 1, wherein said handheld modular stylus comprises a plurality of modules interlinked together to form a unitary laser system having therein a modular housing having means adapted at one end thereof for connection to an external source of current, the opposite end of said housing being coniform with an axial opening therethrough;

said stylus having therein a radiant source connected to said source of current for energization of said radiant source to emission of a laser beam, a wave length modifying means positioned in the path of said laser beam to modify the frequency of said laser beam and to project the wavelength modified laser beam upon an optical means to convergently project said wavelength modified laser beam to the exterior of said modular stylus through the coniform end of said stylus thereof.

11. A modular interchangeable laser system as described in claim 1, comprising a modular stylus adapted at one end with means to receive an electric current from an external source, a semiconductor diode array receiving a current from said source of electric current to emit a laser beam, and a beam-shaping optical means disposed adjacent thereto to shape said laser beam and to project it on a solid-state laser-generating element positioned in the path of said laser beam and receiving a laser-stimulating energy therefrom;

said laser-generating element having an array of semiconductor diodes disposed peripherally thereof to receive an amplifying laser energy from said diode array to form therein a cumulative laser radiation, a harmonic-wave generator positioned in adjacence to said solid-state laser element to collect said cumulative laser radiation therefrom to modify the frequency of the radiation thereof and to project the frequency-modified laser beam on a converging optical lens through a beam-resonating plate disposed therebetween to the exterior of said stylus through a hollow coniform section formed at the terminal end of said stylus.

12. A modular interchangeable laser system as described in claim 1, comprising a tubular stylus formed by a plurality of modules fitted together to form a unitary laser system;

one of said modules at one end of said stylus having a source of electric current and a laser-generating means disposed adjacent thereto receiving a current therefrom for energization of said laser-generating means, and a thermoelectric means disposed adjacently thereto to temperature-condition said laser-generating means emitting a laser beam and projecting it upon a harmonic generator through a beam-concentrating means positioned therebetween; and

optical plate in adjacent relation to said harmonic generator to cause resonance and thereby amplification of the laser-beam frequency modified by said harmonic generator and to direct it upon an optical lens to project it on a Q-switching means positioned in the path of the frequency-modified laser beam to amplify the optical power thereof and to direct the high-power laser beam to the exterior of said stylus through a converging lens disposed in the output coniform end of said stylus.

13. A modular interchangeable laser system as defined in claim 12, wherein said laser-generating means comprises a tubular solid-state lasing bar having a laser-emitting source disposed within the tubular section thereof for receiving from said laser-emitting source a laser-stimulating energy to become excited thereby to emission of a high-power laser radiation, and a thermoelectric means disposed peripherally to said tubular solid-state lasing bar to temperature modulate said laser-generating means.

14. A modular interchangeable laser system as defined in claim 12, wherein said stylus is made up of three modules, one of which contains a laser-generating means, the second module contains a laser-beam modifying means disposed in the path of the laser beam emanating from the laser-generating means to modify the laser beam thereof, and a third module contains an optical means to direct said laser beam on a workpiece;

any one of the three modules in said stylus can be removed and substituted by other modules from the modular section of the stylus in said modular interchangeable laser system.

15. A modular interchangeable laser system as defined in claim 14, wherein said laser-beam modifying means in said second module comprises a frequency-amplifying means, an optical plate partially coated with a reflecting means to produce resonance of the laser beam therein, a converging lens to receive the frequency-amplified laser beam from said laser-beam modifying means and to converge said laser beam upon a Q-switching means to increase the pulsar power of said laser beam in said module.

16. A modular interchangeable laser system as defined in claim 1, wherein said modular stylus consists of two modules assembled together to form a unitary device;

one of said modules contains a high-power laser-generating means and the other module a position-variable optical lens having a housing biased by means of a spring and provided with a thunb button attached to said housing and thereby to said lens in said stylus to change the focus intensity of the laser beam projected therefrom upon a workpiece located externally to said housing.

17. A modular interchangeable laser system as defined in claim 16, wherein said high-power laser-generating means comprises a multiple source of laser beam with a dichroic reflecting means disposed therebetween to resonate the laser beam therein by reflection of the combined laser beams between the mirrors disposed diagonally opposite to each other therein.

18. A modular and interchangeable laser system as defined in claim 1, comprising a modular stylus having therein a semiconductor diode array energized by means of an externally furnished current therein to produce a coherent laser radiation, a laser-beam collimating means adjacently disposed to said diode array to collimate the radiation therefrom and to project it on a solid-state laser circular block having a concave section at one surface thereof and an annular area with a reflective coating thereon formed peripherally to said concave section;

an optical lens positioned adjacent to said concave section to receive a laser beam from said solid-state laser circular block and transfer it to a harmonic generator to frequency-amplify said laser beam and then project in on a Q-switching means positioned in the path of said laser beam;

a converging lens disposed in the radiation output end of said stylus to receive said Q-switched laser beam and to focus it upon a workpiece located externally to said stylus.

19. A modular stylus as defined in claim 18, comprising two modules, one of which containing a laser generating and amplifying means and the other containing a Q-switching and focusing means connected to said first module by means of a threaded section to form a unitary laser-producing means;

said Q-switching and focusing means is adapted to be disconnected from its companion module and connected to any other stylus of the modular and interchangeable laser system to Q-switch the laser beam produced in said other stylus.

20. A modular interchangeable laser system as described in claim 1, wherein said modular stylus comprises two modules, one of which is a laser-beam generator means and the other is a laser-beam modifying means having a hollow coniform section for transmission of the laser beam emitted therein to the exterior thereof;

said laser-beam generator means comprises two laser rods of semicircular cross section in their axial aspects, each having a flat surface with a dichroic coating thereon and placed face to face for acting as laser-beam reflectors and amplifiers;

two semicircular laser emission sources are disposed peripherally to said laser generator means, respectively thereof, to optically pump the semicircular rods when said emission sources are energized by an external current led through one end of said modular stylus; and

, a frequency multiplying means with a lens adjacent thereto is disposed in said second module to amplify the frequency of the laser emission therein and direct it externally to said hollow coniform section.

21. A modular interchangeable laser system as described in claim 1, wherein said stylus comprises two modules connected together to form a single handheld unit;

one of said modules contains a semiconductor diode array at one end of said stylus and receives an electric current from an external source for energizing thereof to emission of a laser beam;

a solid-state laser rod with a conical reflector means fitted therearound disposed axially in adjacent relation to said diode array whereby the laser beam from said diode array optically pumps said laser rod and projects a laser beam on said conical reflector means which being positioned in an angular relation to reflect the laser beam impinging thereon unto said laser rod peripherally thereto for amplification of the laser emission from said laser rod;

the second module having therein a laser-beam modifying means and a hollow coniform section, with said laser-beam modifying means receiving the laser beam from said laser rod to multiply the frequency thereof and to convergently project it through said hollow coniform section to the exterior thereof upon a workpiece positioned adjacent thereto.

22. A modular interchangeable laser system as described in claim 19, wherein said laser-beam-modifying means located in the second module of the stylus has a focusing lens and means adapted to hold said focusing lens in an axial aspect to said stylus and adjacent to the hollow coniform section thereof, said focusing lens having a peripheral support means in said second module and a spring means thereunder to retain said focusing lens in an upwardly biased position, and a thumb button on the exterior of the wall of said module and attached to said peripheral support means to move said peripheral support means and thereby said focusing lens to and away from the reduced section of said hollow coniform section to vary the focus position and hence the intensity of the laser-beam focus projected upon a workpiece externally disposed to said coniform section.

23. A modular interchangeable laser system as defined in claim 1, wherein said radiation outlet means optically connected to said interchangeable radiation source is adapted with means to accept one end of a fiberoptic conduit having at its opposite end an optical lens means and an optical fiber optically connected between said lens means and said interchangeable radiation source to transmit a laser beam from said interchangeable radiation source to a workpiece located adjacent to said lens means externally thereof;

and a second optical fiber connected at one end thereof, in said fiberoptic conduit, to said lens means to collect visual information from said workpiece and to transmit said visual information to the other end thereof having an optical eyepiece which translates said visual information into a pictorial display whereby an observer at the eyepiece can visually sense the laser-processing events occurring at the workpiece.

24. A modular interchangeable laser system as defined in claim 1, wherein said handheld modular stylus comprises two modules connected together to form a unitary laser device;

one of said modules containing therein a laser-beam generating and amplifying means and the other containing therein an optical means positioned in the path of a laser beam emanating from said laser-beam generating and amplifying means to receive and focus said laser beam on a workpiece disposed externally to said handheld modular stylus;

said optical means having a support means in said other module and said support means biased by a spring means thereunder and being provided with a thumb button means located on the external periphery of said other module for displacing said optical means in said module to vary its focus position axially to said module.

25. A modular interchangeable laser system as described in claim 1, wherein said interchangeable radiation source is a titanium-sapphire laser rod optically pumped by means of a laser diode array disposed adjacent thereto.

26. A modular interchangeable laser system as defined in claim 1, wherein said interchangeable radiation source is a neodymium-YAG laser rod optically pumped by means of an array of semiconductor laser diodes disposed in adjacence thereof.

27. A modular interchangeable laser system as defined in claim 1, wherein said interchangeable radiation source is an alexandrite laser rod optically pumped by an array of semiconductor laser diodes disposed in adjacent relation to said alexandrite laser rod.

28. A modular interchangeable laser system as described in claim 1, wherein said interchangeable radiation source is a laser-emitting rod optically pumped by means of a radiant lamp means axially disposed to said laser-emitting rod therein.

29. A modular interchangeable laser system as described in claim 1, wherein said interchangeable radiation source is a laser-emitting rod optically pumped by means of a laser-radiation source disposed adjacent thereto and receiving an electric current from a direct-current source located in the modular housing means of said modular interchangeable laser system.

30. A high-intensity modular laser system comprising a stylus having a plurality of optical modules having tubular housings interlinked together for form a unitary laser system;

one end of said stylus being adapted to receive an electric current from an external source and its opposite end being coniform with opening therethrough;

a semiconductor diode array disposed in said stylus at its end opposite to the coniform section and receiving an energizing current from said source of electric current for emission therefrom of a laser radiation to optically pump a lasing means disposed adjacent thereto and in the path of said laser radiation to stimulate said lasing means to produce a coherent radiation therein, and a laser-beam modifying element positioned axially to said stylus in the path of said coherent radiation to modify said radiation and to project it on an optical element to convergently direct the modified beam of said coherent radiation through said coniform section to the exterior thereof.