# US 11,992,262 B2 · Anti-contamination laser surgery device with built-in optical element

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- Number: US 11,992,262 B2
- Document ID: US11992262B2
- Status: Granted
- Kind: B2
- Application number: 17/489,696
- Filed: 2021-09-29
- Published: 2022-01-20
- Granted: 2024-05-28
- Earliest claimed: 2019-04-08
- Assignees: Peking University School of Stomatology
- Applicants: Peking University School of Stomatology
- Inventors: Fusong Yuan; Peijun Lyu; Shanshan Liang
- Web page: https://patentgrep.com/patent/US11992262B2

## CPC

- A61B 18/20: using laser
- A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)}
- G02B 26/0833: {the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD (G02B26/0825 takes precedence; micromechanical devices in general B81B)}
- G02B 26/101: {with both horizontal and vertical deflecting means, e.g. raster or XY scanners (colour television using laser beams scanning a display screen H04N9/3129)}
- A61B 18/201: {with beam delivery through a hollow tube, e.g. forming an articulated arm (through a flexible conduit A61B18/22); Hand-pieces therefor}
- A61B 18/22: the beam being directed along or through a flexible conduit, e.g. an optical fibre; {Couplings or} hand-pieces therefor
- A61B 90/361: {Image-producing devices, e.g. surgical cameras}
- A61B 2017/00057: {Light}
- A61B 2017/00128: {related to intensity or progress of surgical action}
- A61B 2017/00389: {Button or wheel for performing multiple functions, e.g. rotation of shaft and end effector}
- A61B 2018/00017: {with gas}
- A61B 2018/00601: {Cutting}
- A61B 2018/00785: {Reflected power}
- A61B 2018/00827: {Current}
- A61B 2018/20353: {Scanning in three dimensions [3D]}
- A61B 2018/20359: {by movable mirrors, e.g. galvanometric}
- A61B 2018/20553: {with special lens or reflector arrangement}
- A61B 2018/2227: {Hollow fibres}
- A61B 2034/2057: {Details of tracking cameras}
- A61B 2090/3614: {using optical fibre}
- A61C 1/0046: {Dental lasers (surgical lasers A61B18/20; working by laser beam in general B23K26/00; lasers per se H01S3/00)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)

## Abstract

An anti-contamination laser surgery device with a built-in optical element, including an inner cylinder, an outer cylinder, a first unit configured to enable the inner cylinder and the outer cylinder to be telescopic, a lens moving unit, a two-dimensional laser scanning unit, a real-time monitoring unit, and a second unit configured to perform unidirectional laminar flow ventilation. A head end of the inner cylinder and a tail end of the outer cylinder are matched and connected by the first unit. The two-dimensional laser scanning unit and the real-time monitoring unit are arranged at the head end of the outer cylinder, and the lens moving unit is arranged in the inner cylinder and close to the head end of the inner cylinder. The second unit is arranged close to a tail end of the inner cylinder.

## Claims

### Claim 1

An anti-contamination laser surgery device with a built-in optical element, comprising:
an inner cylinder;
an outer cylinder;
a first unit configured to enable the inner cylinder and the outer cylinder to be telescopic;
a lens moving unit;
a two-dimensional laser scanning unit;
a real-time monitoring unit; and
a second unit configured to perform unidirectional laminar flow ventilation;
wherein a head end of the inner cylinder and a tail end of the outer cylinder are matched and connected by the first unit; the two-dimensional laser scanning unit and the real-time monitoring unit are arranged at the head end of the outer cylinder; the lens moving unit is driven by a driving motor, and is arranged in the inner cylinder and close to the head end of the inner cylinder; and
the second unit is arranged close to a tail end of the inner cylinder; a head end of the outer cylinder is sealed; and the tail end of the inner cylinder is provided with a 45° reflector and a light outlet through hole.

### Claim 2 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the two-dimensional laser scanning unit is selected from the group consisting of a two-dimensional micro-electro-mechanical system (MEMS) scanning mirror and an assembly thereof, a two-dimensional scanning galvanometer and an assembly thereof, a two-dimensional ultrasonic oscillator and an assembly thereof, and a piezoelectric ceramic scanning tube and an assembly thereof.

### Claim 3 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the tail end of the inner cylinder is provided with a detachable bracket; and the 45° reflector and the light outlet through hole are provided on the detachable bracket.

### Claim 4 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the first unit comprises:
a button;
a sliding groove; and
a locking knob;
wherein the button is arranged on an outer side of the inner cylinder; and the sliding groove is arranged on an inner side of the outer cylinder, and is matched with the button;
a plurality of variable-radius arc-shaped surfaces are evenly provided on an inner side of the locking knob; and the inner side of the locking knob is provided with an annular groove; and
the tail end of the outer cylinder is provided with a plurality of elastic sheets that are matched with the plurality of variable-radius arc-shaped surfaces one by one; an inner side of an end of each of the plurality of elastic sheets is fixedly connected to an elastic cushion; and an outer side of the outer cylinder is provided with a buckle matched with the annular groove on the inner side of the locking knob.

### Claim 5 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the lens moving unit comprises:
the drive motor fixedly connected to an inner side of the inner cylinder;
a screw rod;
a screw nut;
a holder;
a lens; and
a fixing ring;
wherein one end of the screw rod is fixedly connected to a rotating shaft of the driving motor, and the other end of the screw rod is fixedly connected to the holder through the screw nut to fixedly connected; and
the lens is fixedly provided in the holder through the fixing ring; the holder is in sliding fit with a sliding groove arranged on the inner side of the inner cylinder through a button arranged on an outer side of the holder.

### Claim 6 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the lens moving unit comprises:
a permanent magnet;
a holder; a lens; and
a hollow moving coil;
wherein the permanent magnet is a part of the inner cylinder; the hollow moving coil is sleevedly provided in the permanent magnet; an outer side of the hollow moving coil is wound with a coil; the holder is arranged on an end of the hollow moving coil; the lens is fixedly provided on the holder; and a sliding key arranged on an outer side of the holder is in sliding fit with a sliding groove arranged on an inner side of the inner cylinder.

### Claim 7 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the two-dimensional laser scanning unit is an assembly of the two-dimensional MEMS scanning mirror; and the assembly of the two-dimensional MEMS scanning mirror comprises a two-dimensional MEMS scanning mirror holder and a two-dimensional MEMS scanning mirror;
the two-dimensional MEMS scanning lens holder is fixedly connected to the head end of the outer cylinder; the two-dimensional MEMS scanning mirror is arranged in a 45° inclined hole on the two-dimensional MEMS scanning lens holder; and the outer cylinder is provided with a working laser through hole; and
the two-dimensional MEMS scanning mirror is driven by electrostatic drive, electromagnetic drive, piezoelectric drive, an electrothermal drive, or a combination thereof.

### Claim 8 (depends on 7)

The anti-contamination laser surgery device of claim 7, further comprising:
a beam splitter; and
a beam splitter holder;
wherein the beam splitter is arranged in a 45° inclined hole on the beam splitter holder; the beam splitter holder is fixedly connected to an inner side of the outer cylinder; one side of the beam splitter is coated with a working laser antireflection film, and the other side of the beam splitter is coated with an imaging light reflection film; and
the beam splitter holder further comprises a horizontal hole and a vertical hole; and the outer cylinder is provided with an imaging light through hole.

### Claim 9 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the real-time monitoring unit is a charge-coupled device (CCD) imaging system, an imaging optical fiber system, or other built-in camera systems.

### Claim 10 (depends on 1)

The anti-contamination laser surgery device of claim 1, wherein the second unit comprises at least one ventilation pipe; and the at least one ventilation pipe is arranged on an outer wall of the inner cylinder between the lens moving unit and the light outlet through hole.