JPH0649083B2 - Laser therapy equipment - Google Patents

Laser therapy equipment

Info

Publication number
JPH0649083B2
JPH0649083B2 JP1294796A JP29479689A JPH0649083B2 JP H0649083 B2 JPH0649083 B2 JP H0649083B2 JP 1294796 A JP1294796 A JP 1294796A JP 29479689 A JP29479689 A JP 29479689A JP H0649083 B2 JPH0649083 B2 JP H0649083B2
Authority
JP
Japan
Prior art keywords
optical system
laser light
laser
optical fiber
incident
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.)
Expired - Lifetime
Application number
JP1294796A
Other languages
Japanese (ja)
Other versions
JPH03155874A (en
Inventor
浩 小泉
Original Assignee
株式会社トプコン
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 株式会社トプコン filed Critical 株式会社トプコン
Priority to JP1294796A priority Critical patent/JPH0649083B2/en
Publication of JPH03155874A publication Critical patent/JPH03155874A/en
Publication of JPH0649083B2 publication Critical patent/JPH0649083B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

Description: FIELD OF THE INVENTION This invention relates to laser treatment devices.

2. Description of the Related Art For example, eye treatment is performed using laser light emitted from a laser light source. The spot size of this type of laser light is one of the treatment conditions, and it is necessary to change it according to the type and content of the treatment.

However, conventionally, the spot size has been changed by moving the optical fiber closer to or further from the diseased part.

Further, there is also one in which the tip size of the optical fiber is formed as a separate piece, and the spot size is changed by changing several kinds of optical fibers having different diameters to the tip part.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described method of changing the spot size by changing the distance between the optical fiber tip and the diseased part, if the aperture angle of emission from the optical fiber is set to be small, the optical fiber tip and the diseased part The change amount of the spot size with respect to the change of the distance is small, and the spot size does not change unless it is moved considerably.

On the other hand, when the exit aperture angle is set to a large value, the change in spot size can be easily obtained, but when the small spot size is desired, the tip of the optical fiber must be brought very close to the diseased part. In particular, intraocular photocoagulation is dangerous because it may damage the retina.

It is an object of the present invention to change the aperture angle of laser light emitted from a light guide optical system to change the spot diameter of laser irradiation without changing the distance between a diseased part of a patient and the tip of an optical fiber. The purpose is to have done.

SUMMARY OF THE INVENTION This invention has a laser treatment device as claimed in the claims.

Means for Solving the Problems Reference is made to FIG.

The condensing optical system is the zoom optical system 3, and the numerical aperture of the laser light flux when the laser light is incident on the optical fiber 10 which is the light guiding optical system is made variable.

Action By changing the aperture angle A of the laser light flux incident on the optical fiber 10 of the laser light 8 as shown in FIGS. 2 and 3, the aperture angle of emission from the tip portion 12 which is the laser light emission end is changed.
Therefore, the spot size is changed while keeping the distance between the tip portion 12 and the diseased portion 15 constant.

Example 1 Referring to FIG.

The output of the laser light source 1 is controlled by the laser control device 2.

The zoom optical system 3 is located between the condenser lens 4 and the laser light source 1. The zoom optical system 3 has concave lenses 5 and 6 and a convex lens 7. Movable part 20 including concave lens 6 and convex lens 7
Can be moved in the optical axis direction by the laser control device 2.

The concave lens 6 and the convex lens 7 can be moved separately.

The laser light 8 of the laser light source 1 passes through the zoom optical system 3 and is condensed by the condenser lens 4. The condensed laser light enters the entrance end of the optical fiber 10 and is irradiated from the tip 12 of the handpiece 11 to the diseased part 15 on the retina 14 of the fundus of the affected eye 13.

The tip portion 12 passes through the sclera 16 of the affected eye 13 and is inserted into the vitreous body 17.

When the light is focused and incident at a numerical aperture (NA) or less of the optical fiber 10, the aperture angle of the beam of the laser light 22 emitted from the optical fiber 10 is substantially equal to the numerical aperture of the laser light flux at the time of incidence. This is because the incident light passes through the inside of the core of the optical fiber 10 while being repeatedly reflected, and when it is emitted from the emission end, the light is emitted with an aperture angle substantially equal to the numerical aperture of the laser light flux when it is incident. Therefore, if the incident light has a small numerical aperture, it will have a small aperture angle, and if the numerical aperture is large, it will have a large aperture angle.

The opening angle of the laser beam 22 emitted from the optical fiber 10 is
By making the zoom optical system 3 changeable, when a small spot size is desired, the aperture angle A1 of the incident laser light beam can be reduced as shown in FIG.
The distance between the tip portion 12 of 0 and the diseased portion 15 can be increased as indicated by L, and safe treatment can be performed.

Further, when the spot size is preferably large as shown in FIG. 3, the distance L between the distal end portion 12 of the optical fiber 10 and the diseased portion 15 can be extremely increased by increasing the aperture angle A2 of the incident laser beam. You can get it without doing it.

In this way, the spot size can be changed without changing the distance L between the tip 12 of the optical fiber and the diseased part 15.

Example 2 Reference is made to FIG. 4 and FIG.

In this embodiment, the diaphragm 33 is used. The aperture changes the numerical aperture of the laser light. In FIG. 4, the diaphragm 33 is opened, and the aperture angle A of the incident laser beam is
3 is big. In FIG. 5, the diaphragm 33 is slightly closed, and the opening angle A4 of the incident laser beam is small. This method is optimal because it can be easily performed when the laser light has a margin.

The laser light 8 from the laser light source 1 is a beam expander 4
After passing through the lenses 30 and 31 of 0, the light is converged by the diaphragm 33 and condensed by the condenser lens 32 to enter the incident end of the optical fiber 10.

The present invention is not limited to the above embodiment. A mechanical diaphragm or an electric diaphragm can be adopted as the diaphragm.

Advantageous Effects of the Invention Since the distance between the diseased part of the patient and the emitting end of the laser beam can be kept constant and sufficiently without being affected by the size of the spot diameter, accidental damage to the diseased part is prevented and the safety of laser treatment is improved. Can be improved. Also, the size of the spot diameter can be easily changed.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a laser treatment apparatus of the present invention, FIGS. 2 and 3 are operation diagrams of the first embodiment, and FIGS.
The figure shows the second embodiment. 1 ... Laser light source 2 ... Laser control device 3 ... Zoom optical system 4 ... Condensing lens 10 ... Optical fiber 15 ... Disease part

Claims (1)

[Claims]
1. A laser treatment apparatus for guiding a laser beam emitted from a laser light source to a light guide optical system through a focusing optical system to irradiate and treat a diseased part of a patient, wherein the focusing optical system is a zoom optical system. The laser treatment device is characterized in that the numerical aperture of the laser beam when entering the light guiding optical system is variable.
JP1294796A 1989-11-15 1989-11-15 Laser therapy equipment Expired - Lifetime JPH0649083B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1294796A JPH0649083B2 (en) 1989-11-15 1989-11-15 Laser therapy equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1294796A JPH0649083B2 (en) 1989-11-15 1989-11-15 Laser therapy equipment

Publications (2)

Publication Number Publication Date
JPH03155874A JPH03155874A (en) 1991-07-03
JPH0649083B2 true JPH0649083B2 (en) 1994-06-29

Family

ID=17812384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1294796A Expired - Lifetime JPH0649083B2 (en) 1989-11-15 1989-11-15 Laser therapy equipment

Country Status (1)

Country Link
JP (1) JPH0649083B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013521101A (en) * 2010-03-05 2013-06-10 トプコン・メディカル・レーザー・システムズ・インコーポレイテッドTopcon Medical Laser Systems, Inc. Interferometric fiber tube bundle system and method for intraocular treatment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8267925B2 (en) * 2009-07-29 2012-09-18 Alcon Lensx, Inc. Optical system for ophthalmic surgical laser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01236071A (en) * 1988-03-16 1989-09-20 Nidek Co Ltd Medical laser device 2

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01236071A (en) * 1988-03-16 1989-09-20 Nidek Co Ltd Medical laser device 2

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013521101A (en) * 2010-03-05 2013-06-10 トプコン・メディカル・レーザー・システムズ・インコーポレイテッドTopcon Medical Laser Systems, Inc. Interferometric fiber tube bundle system and method for intraocular treatment

Also Published As

Publication number Publication date
JPH03155874A (en) 1991-07-03

Similar Documents

Publication Publication Date Title
KR101862809B1 (en) White coherent laser light launched into nano fibers for surgical illumination
EP0191688B1 (en) Surgical apparatus for corneal curvature adjustment
US4633866A (en) Ophthalmic laser surgical method
EP0993814B1 (en) Corneal aplanation device
US4398790A (en) Optical fiber device for the transportation and focalization of laser radiation
AU678967B2 (en) Apparatus and method for performing eye surgery
US3800388A (en) Apparatus for aligning two optical components
US5437658A (en) Method and system for laser thermokeratoplasty of the cornea
US5395362A (en) Methods and apparatus for distributing laser radiation
DE4028605C2 (en) Illumination device for a surgical microscope
FI56624C (en) Laserdrivet ophthalmoscope
JP2582857B2 (en) Ophthalmic laser surgery device
US5147352A (en) Optical system for use in a surgical apparatus
AU647533B2 (en) Laser thermokeratoplasty methods and apparatus
DE4233274B4 (en) Optical eye treatment device
US3710798A (en) Laser system for microsurgery
US6096028A (en) Multi-slot laser surgery
USRE40420E1 (en) Method and device for treating opaqueness and/or hardening of a closed eye
DE10124358C1 (en) Laser system for eye surgery, e.g. cornea transplantation, has laser pulse focus controlled for providing rebated cut within cornea
US4736744A (en) Laser coagulation system
US5263952A (en) Two-piece tip for fiber optic catheter
US4391275A (en) Method for the surgical treatment of the eye
US5123902A (en) Method and apparatus for performing surgery on tissue wherein a laser beam is applied to the tissue
US4878725A (en) Apparatus for the circumferential irradiation of objects
US5098427A (en) Surgical laser instrument