GB2274724A - Improvements in laser hand piece - Google Patents

Improvements in laser hand piece Download PDF

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Publication number
GB2274724A
GB2274724A GB9302033A GB9302033A GB2274724A GB 2274724 A GB2274724 A GB 2274724A GB 9302033 A GB9302033 A GB 9302033A GB 9302033 A GB9302033 A GB 9302033A GB 2274724 A GB2274724 A GB 2274724A
Authority
GB
United Kingdom
Prior art keywords
hand piece
mirror
laser
lens
laser beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9302033A
Other versions
GB2274724B (en
GB9302033D0 (en
Inventor
Isaac Kaplan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optomedic Technologies Ltd
Original Assignee
Optomedic Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optomedic Technologies Ltd filed Critical Optomedic Technologies Ltd
Priority to GB9302033A priority Critical patent/GB2274724B/en
Priority to FR9301297A priority patent/FR2701204B3/en
Publication of GB9302033D0 publication Critical patent/GB9302033D0/en
Priority to DE4311819A priority patent/DE4311819A1/en
Publication of GB2274724A publication Critical patent/GB2274724A/en
Application granted granted Critical
Publication of GB2274724B publication Critical patent/GB2274724B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/201—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser with beam delivery through a hollow tube, e.g. forming an articulated arm ; Hand-pieces therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B2018/2015—Miscellaneous features
    • A61B2018/2025—Miscellaneous features with a pilot laser

Description

2274724 IMPROVEMENTS IN LASER HAND PIECE
FIELD AND BACKGROUND OF INVENTION
The present invention relates to a laser apparatus, and more particularly to an improved hand piece thereof.
It is known that in order to focus the laser beam through the hand piece of a CO surgical laser a lens is used.
Usually a zinc selenide lens Is employed since this permits transmission of the CO beam (10.6 microns) as well as the HeNe guide light (red) which Indicates the focal point.
In most of these laser apparatuses a lens with 125 mm focal length is used. since this can be placed before the hand piece leaving enough length to enable the hand piece to be handled with comfort.
However, If a lens with a shorter focal length could be employed the spot size of the beam at the focal point would be smaller thus Increasing the energy density (watts per sq. cm) and rendering the laser more efficient.
It is thus desirable to have a laser apparatus with a short focal length.
However, due to the fact that the hand piece must be sterilisable by autoclaving (dry heat) after each operation, and this cannot be applied to the lens since the coating is destroyed by heat. the result Is that a short focal length lens cannot be incorporated into the hand piece if sterilisation by heat is required.
OBJECTS OF THE INVENTION It is thus an object of the present Invention to have a laser apparatus with a short focal length.
It is a further object of the present invention to provide a laser apparatus with a lens which will not be affected by the autoclaving sterilisation.
SUMMARY OF THE INVENTION
According to the invention, the lens Is replaced by metal mirrors, preferably paraboloid mirrors which can be incorporated into the hand piece making the device for laser surgery simple and more functional.
The focal length required can be determined by changing the radius of the curvature so that a short focal length can be installed as required.
3 BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference.to the annexed drawings in which: Fig. 1 is a schematical illustration of a conventional hand piece. Fig. 2 is a schematical sectional illustration of the hand piece according to the invention. Fig. 3 is an embodiment of the hand piece.
DESCRIPTION OF THE PREFERED EMBODIMENT
Turning first to Fig. 1 the hand piece 1 is provided with lens 2 the focal length of which is 125 mm thus the focal point (FP) 3 has a diameter of about.4mm.
As can be seen in Fig. 2 the laser beam engages a paraboloid mirror 5 which reflects the beam to a second mirror 6 mounted rearwards of mirror 5 which - in turn reflects the beam substantially in the longitudinal axis of the hand piece. to exit 7 and through it Into the open. The beam is directed at will to the point where it is desired to become active. The focal length of the mirror 5 is 5Omm or less thus the focal point (FP) has a diameter of about lmm or less.
1 b.:
- 4 The embodiment of hand piece shown in Fig. 3 illustrates a hand piece 1 where the opening 7 is off-center of mirror 5. Mirror 6 is mounted on the wall of the hand piece.

Claims (7)

CLAIMS:
1. Hand piece for a laser beam apparatus comprising a tubular casing at one end of which a first paraboloid metal mirror with a aperture is provided, and a second mirror rearwards of the first one and In line with the aperture of the first mirror.
2. The hand piece claimed in claim 1, characterised thereby that the said first mirror is a paraboloid mirror.
3. The hand piece claimed in claim 1 characterised thereby that said aperture Is located In the center of said mirror.
4. The hand piece claimed in claim 1 characterised thereby that said aperture Is off center of said mirror.
5. A hand piece for a laser beam apparatus substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.
6. A hand piece for a laser beam apparatus substantially as hereinbefore described with reference to Figure 3 of the accompanying drawings.
7. Laser beam apparatus incorporating a hand piece as claimed in any preceding claim.
GB9302033A 1993-02-02 1993-02-02 Improvements in laser hand pieces Expired - Fee Related GB2274724B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9302033A GB2274724B (en) 1993-02-02 1993-02-02 Improvements in laser hand pieces
FR9301297A FR2701204B3 (en) 1993-02-02 1993-02-05 Manual instrument of laser beam surgical device.
DE4311819A DE4311819A1 (en) 1993-02-02 1993-04-13 Handpiece for a laser device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9302033A GB2274724B (en) 1993-02-02 1993-02-02 Improvements in laser hand pieces
FR9301297A FR2701204B3 (en) 1993-02-02 1993-02-05 Manual instrument of laser beam surgical device.
DE4311819A DE4311819A1 (en) 1993-02-02 1993-04-13 Handpiece for a laser device

Publications (3)

Publication Number Publication Date
GB9302033D0 GB9302033D0 (en) 1993-03-17
GB2274724A true GB2274724A (en) 1994-08-03
GB2274724B GB2274724B (en) 1996-05-22

Family

ID=27204948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9302033A Expired - Fee Related GB2274724B (en) 1993-02-02 1993-02-02 Improvements in laser hand pieces

Country Status (3)

Country Link
DE (1) DE4311819A1 (en)
FR (1) FR2701204B3 (en)
GB (1) GB2274724B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030816A (en) * 1976-04-22 1977-06-21 Caterpillar Tractor Co. Variable focus right angle mirror for laser beam manipulation
GB1477710A (en) * 1973-08-20 1977-06-22 Caterpillar Tractor Co Apparatus for focusing laser beams
GB1547172A (en) * 1976-06-24 1979-06-06 Nat Res Dev Methods and apparatus for cutting welding drilling and surface treating
WO1987005794A1 (en) * 1986-04-03 1987-10-08 Laserex Limited Laser surgery system
EP0339865A2 (en) * 1988-04-28 1989-11-02 Alumor Lasers Ltd. Apparatus for configuring optical radiation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1477710A (en) * 1973-08-20 1977-06-22 Caterpillar Tractor Co Apparatus for focusing laser beams
US4030816A (en) * 1976-04-22 1977-06-21 Caterpillar Tractor Co. Variable focus right angle mirror for laser beam manipulation
GB1547172A (en) * 1976-06-24 1979-06-06 Nat Res Dev Methods and apparatus for cutting welding drilling and surface treating
WO1987005794A1 (en) * 1986-04-03 1987-10-08 Laserex Limited Laser surgery system
EP0339865A2 (en) * 1988-04-28 1989-11-02 Alumor Lasers Ltd. Apparatus for configuring optical radiation

Also Published As

Publication number Publication date
FR2701204A1 (en) 1994-08-12
GB2274724B (en) 1996-05-22
FR2701204B3 (en) 1995-04-07
GB9302033D0 (en) 1993-03-17
DE4311819A1 (en) 1994-10-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970202