JPS6036253Y2 - Dental medical laser handpiece - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser band piece for dental care that allows the distance from the tip of the head to the laser beam focal point to be adjusted.

Conventionally, in general medical laser band pieces, the distance from the irradiation end face of the laser beam irradiation head to the laser beam focal point is constant, and therefore, in order to direct the laser beam spot to the irradiation area (affected area), the distance is fixed. The method used was to manually adjust the distance to the head.

Such manual operations are particularly difficult in oral cavity treatment in dentistry.

In order to solve the above-mentioned drawbacks of the conventional example, the present invention provides a mechanism for adjusting the distance from the irradiation end surface of the head to the focal point of the laser beam, which can be arbitrarily adjusted according to the position of the affected area, making treatment easier. The present invention provides a laser band piece for dental treatment.

Hereinafter, embodiments will be described in detail with reference to the drawings.

Fig. 1 shows the first embodiment of the present invention, and 1 is the main body case of the band piece, which has a built-in glass fiber 2 that guides laser light from a laser oscillator (not shown) and a concave lens 3 that spreads the laser light. There is.

Reference numeral 4 denotes a head case, which has a mirror 5 and an objective lens 6.

Further, 7 is a ring connecting the main body case and the head part case 4, and is provided with a convex lens 8.

Since this ring 7 is rotatably screwed into the main body case 1, the distance between the concave lens 3 and the convex lens 8 can be expanded or contracted by rotating the ring 7.

Now, as shown in FIG. 1, a concave lens 3 and a convex lens 8
If the distance 11 from the convex lens 8 is made equal to the focal length f□ of the convex lens 8, the laser light emitted from the focal point will be incident on the convex lens 8, so the light passing through the convex lens 8 will become parallel rays.

When this parallel ray passes through the reflective objective lens 6 by the mirror 5, it is converged at a point at a distance of 1°, but if the focal length of the objective lens 6 is f2, then Y=1□=f2.

Next, as shown in FIG. 2, the ring 7 is rotated together with the head section to increase the distance between the concave lens 3 and the convex lens 8 by 1.
') When set to f, the laser beam that passed through the convex lens 8 is biased inward, and therefore the light that passed through the convex lens 6 is 1゜'〈
Focus at f2.

Conversely, when 11''<fz, 1□''>f2.

As described above, in this embodiment, the concave lens 3 and the convex lens 8
By changing the distance from This has the advantage that the distance from the end face of the head section to the focal point of the laser beam can be adjusted arbitrarily.

FIG. 3 shows another embodiment of the present invention, and depending on the type of glass fiber, the laser light emitted from the end may spread.

By using this type of glass fiber 2a, the first
The concave lens 3 in the figure can be omitted.

In this embodiment, the convex lens 8 is fixed to the head case 4a, and the distance L1 between the convex lens 8 and the end of the glass fiber 2a on the main body case 1a side is changed by the ring 7a, so that the laser beam is emitted from the irradiation end surface of the head part. The distance to the focal point of the light can be adjusted.

FIG. 4 shows still another embodiment of the present invention.
Since the laser light emitted from the glass fiber 2a spreads, it is also possible to omit the convex lens 8 in FIG. 3.

That is, the distance L2 is adjusted by changing the distance D1 from the end of the glass fiber 2a to the objective lens 6 after being reflected by the mirror 5.

The distance HD+ can be easily changed by rotating the ring 7a relative to the main body case 1a.

As explained above, according to the present invention, the focusing distance of the laser beam can be arbitrarily adjusted according to the position of the affected area, which makes dental treatment easier and more accurate, and also allows the laser beam to be focused on normal areas other than the affected area. There is an advantage that the danger of being irradiated with laser light can be prevented as much as possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, and FIG. 3 is a block diagram of another embodiment of the present invention.
FIG. 4 is a block diagram of still another embodiment of the present invention. 1.1a...Main case, 2,2a...
・Glass fiber, 3...Concave lens, 4*
4at 4b...Head part case, 5...
... Mirror 6 ... Objective lens, 7, 7a.
...Ring, 8...Convex lens.

Claims (1)

[Scope of utility model registration request] A laser band piece for dental care that focuses laser light and irradiates it to an affected area, etc., which includes at least a band piece body case into which a glass fiber that guides the laser light is inserted, and a head that includes a mirror and an objective lens that change the optical path of the laser light. a connecting ring that connects the main body case and the head case by having one end screwed onto the head case and the other end rotatably screwed onto the main body case; By rotating with respect to the main body case and adjusting the distance between the two cases, the beam opening angle of the laser beam incident on the objective lens can be changed, and the distance from the objective lens to the focal point of the laser beam can be adjusted. A dental medical laser band piece featuring: