CN112690946A

CN112690946A - Protective mask for ophthalmologic treatment

Info

Publication number: CN112690946A
Application number: CN202011382931.4A
Authority: CN
Inventors: 廖子芳
Original assignee: Shenzhen Eye Hospital (shenzhen Institute Of Eye Disease Prevention And Control)
Current assignee: Shenzhen Eye Hospital (shenzhen Institute Of Eye Disease Prevention And Control)
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-04-23

Abstract

The invention discloses a protective mask for ophthalmologic treatment, which comprises a head-wearing component, a transparent plastic mask and a glass lens component, wherein the head-wearing component is suitable for being worn on the head of a user; the transparent plastic mask is detachably arranged on the head-wearing assembly and is provided with a hollow window; the glass lens assembly is positioned behind the hollow window and connected to the head-mounted assembly; when the head wearing assembly is worn on the head of a user, the transparent plastic mask at least shields the face of the user, and the glass lens assembly is positioned in front of the eyes of the user and is used for light transmission. According to the protective mask for ophthalmic treatment, the transparent plastic mask can protect the face, the cost is low, the transparent plastic mask can be detached and replaced when the protective mask is used for one time, the glass lens component can protect the eyes, and the glass has higher light transmittance compared with the plastic, so that the visual effect of a doctor is basically not influenced, and the treatment operation of the doctor is facilitated.

Description

Protective mask for ophthalmologic treatment

Technical Field

The invention relates to an ophthalmologic medical device, in particular to a protective mask for ophthalmologic treatment.

Background

Ophthalmic diseases belong to one of common diseases, lacrimal passage irrigation and lacrimal passage probing are common treatment means for ophthalmic diseases, and pollutants in lacrimal passage reflux, pollutants sprayed from oral cavity and nasal cavity and the like are easy to splash to the face of a doctor in the treatment process of the lacrimal passage irrigation and lacrimal passage probing.

In the correlation technique, adopt the protective mask to shelter from the protection to doctor's face, however, be in the factor consideration such as cost and rate of utilization, these face guards all adopt the plastic material preparation, and the luminousness of plastic material is relatively poor, wears this kind of face guard, and these operations that become more meticulous to eye treatment produce the influence in the vision easily, lead to doctor's inconvenient operation, influence treatment.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a protective mask for ophthalmologic treatment.

To achieve the above object, a protective mask for ophthalmic treatment according to an embodiment of the present invention includes:

a headgear assembly adapted to be worn on a head of a user;

the transparent plastic mask is detachably arranged on the head-mounted assembly, and a hollow window is formed in the transparent plastic mask;

the glass lens assembly is positioned behind the hollowed-out window and is connected to the head-mounted assembly;

when the head-mounted assembly is worn on the head of a user, the transparent plastic mask at least shields the face of the user, and the glass lens assembly is positioned in front of the eyes of the user and is used for light transmission.

According to the protective mask for ophthalmic treatment provided by the embodiment of the invention, the structure that the transparent plastic mask is combined with the glass lens assembly is adopted, the hollowed window is arranged on the transparent plastic mask, the glass lens assembly is positioned behind the hollowed window, and the glass lens is connected to the head-wearing assembly, so that the transparent plastic mask can play a role in protecting the face, the cost is low, the transparent plastic mask can be detached and replaced when the protective mask is used for one time, the glass lens assembly can play a role in protecting the eye, and the glass has higher light transmittance compared with the plastic, so that the visual effect of a doctor is not influenced basically, and the therapeutic operation of the doctor is facilitated. In addition, when in use, the head-wearing component can be worn on the head of a user, and the use is convenient and simple.

In addition, the protective mask for ophthalmic therapy according to the above embodiment of the present invention may have the following additional technical features:

according to one embodiment of the invention, the headgear assembly comprises:

the bracket is formed into an arc shape extending around the forehead of the user, and the bottom of the bracket is provided with a slot extending along the extending direction of the bracket;

the binding piece is connected to the bracket and used for fixing the bracket on the forehead of a user;

the upper end of the transparent plastic mask is inserted into the slot.

According to one embodiment of the invention, the upper end of the transparent plastic mask is vertically slidable within the slot;

the head-wearing assembly further comprises an elastic abutting piece, the elastic abutting piece penetrates through the support, one end of the elastic abutting piece extends into the slot to abut against the transparent plastic mask, and the elastic abutting piece is used for selectively fixing the transparent plastic mask at a required height position.

According to one embodiment of the invention, the glass lens assembly is configured to be vertically movable to adjust the position of the glass lens in the vertical direction.

According to an embodiment of the present invention, the elastic supporting member is a wave ball screw, the wave ball screw includes a cylindrical shell, a wave ball and a spring, the cylindrical shell is screwed on the bracket and extends to the wall of the slot, the wave ball is disposed at one end of the cylindrical shell and protrudes from the wall of the slot, and the spring is disposed in the cylindrical shell and supports on the wave ball, so that the wave ball supports the transparent plastic mask.

According to one embodiment of the invention, the glass lens component comprises:

a glass lens;

the driving assembly is installed on the support and connected with the glass lens and used for driving the glass lens to move vertically.

According to one embodiment of the invention, the drive assembly comprises:

one end of the suspension seat is fixed on the bracket, and the other end of the suspension seat extends downwards;

the screw rod is pivotally arranged on the suspension seat and extends vertically, and is provided with a spiral groove;

the operation knob is arranged at the top of the bracket and is connected with the screw rod so as to be operated by a user to drive the screw rod to rotate;

the sliding block is arranged on the suspension seat in a sliding mode along the vertical direction and sleeved outside the screw rod, and the glass lens is connected to the sliding block;

the bayonet lock penetrates through the sliding block, and one end of the bayonet lock extends into the spiral groove of the screw rod;

when the screw rod rotates, the clamping pin slides in the spiral groove to push the sliding block and the glass lens to move vertically.

According to one embodiment of the invention, the glass lens is provided with a fastener, and the sliding block is provided with a fastening hole suitable for being fastened with the fastener.

According to one embodiment of the invention, a pivoting seat is arranged on the front side of the support, a spotlighting lamp is pivotally connected to the pivoting seat, and the lighting lamp can pivot around a horizontal axis so as to adjust the irradiation angle of the lighting lamp.

According to one embodiment of the invention, an energy storage battery for supplying power to the lighting fixture is arranged on the bracket.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of a protective mask for ophthalmic treatment according to an embodiment of the present invention;

FIG. 2 is a schematic view of another perspective of an ophthalmic therapeutic face shield in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of an eye-protection mask according to an embodiment of the present invention;

FIG. 4 is an exploded view of another perspective of an ophthalmic therapeutic face shield in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of a glass lens assembly for use in an ophthalmic protective mask in accordance with an embodiment of the present invention;

FIG. 6 is an exploded view of a glass lens assembly for an ophthalmic therapeutic face shield according to an embodiment of the present invention;

FIG. 7 is a schematic view of a head set of an ophthalmic therapeutic face shield according to an embodiment of the present invention;

fig. 8 is a cross-sectional view of a head set in an elastic support member of a protective mask for ophthalmic treatment according to an embodiment of the present invention.

Reference numerals:

10. a headgear assembly;

101. a support;

1011. a pivoting seat;

h101, a slot;

102. a tie down;

103. an elastic abutting member;

1031. a column shell;

1032. beads;

1033. a spring;

20. a transparent plastic mask;

h20, a hollow window;

30. a glass lens assembly;

301. a glass lens;

3011. a fastener;

302. a drive assembly;

3021. a suspension base;

3022. a screw rod;

3022a, spiral groove;

3023. an operation knob;

3024. a slider;

3025. a bayonet lock;

40. a lighting fixture.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A protective mask for ophthalmic treatment according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 8, a protective mask for ophthalmic therapy according to an embodiment of the present invention includes a head set 10, a transparent plastic mask 20, and a glass lens set 30.

In particular, the headgear assembly 10 is adapted to be worn on the head of a user, i.e., the ophthalmic therapeutic protective mask can be worn and secured on the head of a user, which can be a doctor or other assistant, by the headgear assembly 10 in use.

The transparent plastic face mask 20 is detachably mounted on the head-wearing assembly 10, the transparent plastic face mask 20 is provided with a hollow window H20, and the area of the transparent plastic face mask 20 can at least cover the face of a user.

The glass lens assembly 30 is located behind the hollowed window H20, and the glass lens assembly 30 is connected to the head-mounted assembly 10; when the headgear assembly 10 is worn on the head of a user, the transparent plastic mask 20 at least shields the face of the user, and the glass lens assembly 30 is located in front of the eyes of the user for light transmission, i.e., the eyes of the user can see through the glass lens assembly 30 and the hollow window H20 to observe the patient, thereby facilitating the treatment operation on the patient.

According to the protective mask for ophthalmic treatment provided by the embodiment of the invention, the structure that the transparent plastic mask 20 is combined with the glass lens assembly 30 is adopted, the hollow window H20 is arranged on the transparent plastic mask 20, the glass lens assembly 30 is positioned behind the hollow window H20, and the glass lens is connected to the head-mounted assembly 10, so that the transparent plastic mask 20 can protect the face and has low cost, the transparent plastic mask can be detached and replaced when being used for one time, the glass lens assembly 30 can protect the eyes, and the glass has higher light transmittance compared with the plastic, so that the visual effect of a doctor is basically not influenced, and the therapeutic operation of the doctor is facilitated. In addition, when in use, the head wearing assembly 10 can be worn on the head of a user, and the use is convenient and simple.

In some embodiments of the present invention, the headgear assembly 10 includes a support 101 and a binding member 102, wherein the support 101 is formed in an arc shape extending around the forehead of the user, and a bottom of the support 101 is provided with a slot H101, and the slot H101 extends along an extending direction of the support 101. A binding piece 102 is connected to the bracket 101 for fixing the bracket 101 on the forehead of a user; the upper end of the transparent plastic mask 20 is inserted into the slot H101.

That is to say, the shape of the support 101 is adapted to the forehead portion of the head of the human body, for example, the support 101 is configured into a semi-annular hoop structure, the bottom of the support 101 is provided with an insertion groove H101, the width of the insertion groove H101 is adapted to the thickness of the transparent plastic mask 20, and the insertion groove H101 can be inserted into the insertion groove H101 from bottom to top, so as to realize the detachable connection between the transparent plastic mask 20 and the support 101. In addition, the binding member 102 is connected to the frame 101, so as to facilitate the wearing of the ophthalmic therapeutic mask on the head of the user during use, and the binding member 102 may be an elastic band or other ring-shaped or belt-shaped member.

In this embodiment, the head-mounted assembly 10 with the above structure is adopted, on one hand, the detachable connection is realized by inserting the slot H101 on the bracket 101 into the transparent plastic mask 20, the structure is simple, the connection is convenient, and the replacement of the transparent plastic mask 20 is convenient. On the other hand, the use of the binding 102 is convenient for wearing.

In an embodiment of the present invention, the upper end of the transparent plastic mask 20 is vertically slidable in the slot H101, that is, the slot H101 has a predetermined depth in the vertical direction, and when the upper end of the transparent plastic mask 20 is inserted into the slot H101, the upper end can vertically move in the slot H101, so as to adjust the depth of the upper end inserted into the slot H101, and correspondingly, the position of the hollow window H20 on the transparent plastic mask 20 in the vertical direction can be adjusted.

The head-wearing assembly 10 further includes an elastic abutting member 103, the elastic abutting member 103 is disposed on the support 101 in a penetrating manner, and one end of the elastic abutting member 103 extends into the slot H101 to abut against the transparent plastic mask 20, so as to selectively fix the transparent plastic mask 20 at a desired height position, for example, the elastic abutting member 103 is perpendicular to a sidewall of the slot H101. When the upper end of the transparent plastic face shield 20 is inserted into the slot H101 at the bottom of the bracket 101, the end of the elastic abutting member 103 extending into the slot H101 can abut against the upper end of the transparent plastic face shield 20, so that the transparent plastic face shield 20 and the bracket 101 are relatively fixed.

Because to different users and wear the difference at the head position, when the user wears this protective mask for ophthalmic therapy at the head, there may be fretwork window H20 and not accurately aim at user's eye, and the user adjusts the height position that protective mask for ophthalmic therapy wore at the head again and again comparatively loaded down with trivial details, consequently, can insert the degree of depth in slot H101 through adjusting transparent plastic face guard 20, and then adjust the position of fretwork window H20, be convenient for fretwork window H20 to aim at with user's eye, in order to facilitate the use and adapt to different users.

When the protective mask for ophthalmic therapy is used specifically, a user wears the protective mask for ophthalmic therapy on the head, if the hollowed-out window H20 is not aligned with the eyes of the user, the transparent plastic mask 20 can be pulled upwards or pushed upwards with little force, the depth of the upper end of the transparent plastic mask 20 inserted into the slot H101 is changed until the hollowed-out window H20 is aligned with the eyes of the user, due to the elastic acting force provided by the elastic abutting piece 103, the user can keep the transparent plastic mask 20 at the current position by utilizing the abutting action of the elastic abutting piece 103 after loosening the transparent plastic mask 20, and then the alignment adjustment of the hollowed-out window H20 and the eyes of the user is completed, the adjustment is convenient, and the transparent plastic mask 20 can be ensured to be fixed reliably by utilizing the elastic abutting piece 103.

In one embodiment of the present invention, the glass lens assembly 30 is configured to be vertically movable to adjust the position of the glass lens assembly 30 in the vertical direction.

As described above, the hollow window H20 can be adjusted vertically to align with the eye of the user, in this embodiment, the glass lens assembly 30 is configured to be vertically movable, so that the position of the glass lens assembly 30 in the vertical direction can be adjusted, and then the glass lens assembly 30 is located between the hollow window H20 and the eye of the user, and is aligned with the eye of the user, thereby facilitating use and adapting to different users.

In an embodiment of the present invention, the elastic holding member 103 is a bead 1032 screw, the bead 1032 screw includes a column housing 1031, a bead 1032 and a spring 1033, the column housing 1031 is screwed on the bracket 101 and extends to the wall of the slot H101, the bead 1032 is disposed at one end of the column housing 1031 and protrudes from the wall of the slot H101, and the spring 1033 is disposed in the column housing 1031 and holds on the bead 1032 to hold the bead 1032 against the transparent plastic mask 20.

In this embodiment, the elastic supporting member 103 is a wave bead 1032 screw, and during assembly, only a threaded hole needs to be formed in the side surface of the bracket 101, and then the wave bead 1032 screw is screwed into the threaded hole, so that the wave bead 1032 of the wave bead 1032 screw protrudes from the wall of the slot H101, and the structure is simple and the assembly is convenient. Moreover, the beads 1032 can be reliably kept against the transparent plastic face mask 20 under the elastic force provided by the spring 1033, and the transparent plastic face mask 20 is reliably fixed. In addition, when the transparent plastic face mask 20 is inserted into the slot H101, the transparent plastic face mask 20 only needs to be pushed upwards with a small force, and the beads 1032 are squeezed by the transparent plastic face mask 20 and enter between the walls of the beads 1032 and the slot H101, so that the assembly and the adjustment are convenient.

In some embodiments of the present invention, the glass lens assembly 30 comprises a glass lens 301 and a driving assembly 302, wherein the driving assembly 302 is mounted on the bracket 101 and connected to the glass lens 301 for driving the glass lens 301 to move vertically.

That is to say, on drive assembly 302 installing support 101, can drive glass lens 301 along vertical motion, and then adjust the position of glass lens 301 in the vertical, so, the user can drive glass lens 301 along vertical removal through drive assembly 302 when using, and then adjust glass lens 301 and user's eyes relatively, its easy operation is convenient.

In one embodiment of the present invention, the driving assembly 302 includes a suspension base 3021, a screw rod 3022, an operation knob 3023, a sliding block 3024, and a latch 3025, wherein one end of the suspension base 3021 is fixed on the bracket 101, the other end of the suspension base 3021 extends downward, and an upper end of the suspension base 3021 is fixed on the bottom of the bracket 101 by a fastener such as a screw, and is located on the bracket 101 corresponding to a middle position of the forehead of the user.

The screw rod 3022 is pivotally arranged on the suspension base 3021 and extends vertically, and the screw rod 3022 is provided with a spiral groove 3022 a; an operating knob 3023 is arranged at the top of the bracket 101, and is connected with the screw rod 3022, so that a user can operate the operating knob to drive the screw rod 3022 to rotate; that is, the user can rotate the operation knob 3023, and then drive the screw rod 3022 to rotate around its axis by the operation knob 3023.

A sliding block 3024 is vertically slidably arranged on the suspension base 3021 and sleeved outside the screw rod 3022, and the glass lens 301 is connected to the sliding block 3024; a bayonet 3025 is arranged on the sliding block in a penetrating manner, and one end of the bayonet is extended into the spiral groove 3022a of the screw rod 3022. When the screw rod 3022 rotates, the bayonet 3025 slides in the spiral groove 3022a to push the slide block 3024 and the glass lens 301 to move vertically.

Since one end of the bayonet 3025 protrudes into the spiral groove 3022a of the screw rod 3022, when the screw rod 3022 rotates, the rotation of the screw rod 3022 can be converted into the sliding of the sliding block 3024 along the vertical direction by the matching of the bayonet 3025 and the spiral groove 3022a, and in the embodiment, by the structure that the bayonet 3025 is matched with the spiral groove 3022a on the screw rod 3022, the adjustment precision is higher, the adjustment is smoother, and the stability and the reliability of the structure are higher.

It is understood that in other embodiments of the present invention, the sliding block 3024 and the screw rod 3022 may be in threaded engagement, and the glass lens 301 may be driven instead of the bayonet 3025 engaging the spiral groove 3022 a.

In an embodiment of the present invention, a fastening component 3011 is disposed on the glass lens 301, and a fastening hole adapted to fasten with the fastening component 3011 is disposed on the sliding block 3024.

In this embodiment, the glass lens 301 and the sliding block 3024 can be quickly disassembled and assembled by using the fastener 3011 on the glass lens 301 and the fastener hole on the sliding block 3024, so that the glass lens 301 can be quickly disassembled and assembled without using the glass lens 301 or replacing the glass lens 301.

In addition, especially when the user is equipped with glasses, the protective mask for ophthalmic therapy can be used after the glass lens 301 in the protective mask for ophthalmic therapy is detached, so that the protective mask for ophthalmic therapy is more flexible and convenient to use and can be suitable for different users.

In an embodiment of the present invention, a pivoting base 1011 is disposed on the front side of the support 101, the lighting fixture 40 capable of condensing light is pivotally connected to the pivoting base 1011, and the lighting fixture 40 is pivotable around a horizontal axis to adjust an illumination angle of the lighting fixture 40.

In this embodiment, the rotatably adjustable illumination lamp 40 is disposed on the support 101, and when a doctor performs eye treatment, if light is poor, the illumination lamp 40 can be turned on to perform auxiliary illumination, and the eye and other parts of the patient are irradiated by the illumination lamp 40, so that the doctor can perform treatment conveniently, and the use is very convenient.

Optionally, an energy storage battery for supplying power to the lighting fixture 40 is disposed on the bracket 101, so as to conveniently supply power to the lighting fixture 40.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A protective mask for ophthalmic treatment, comprising:

a headgear assembly adapted to be worn on a head of a user;

2. The ophthalmic-treatment protective mask of claim 1, wherein the headgear assembly comprises:

the upper end of the transparent plastic mask is inserted into the slot.

3. The ophthalmic-treatment protective mask of claim 2, wherein the upper end of the transparent plastic mask is vertically slidable within the slot;

4. The ophthalmic therapeutic face shield of claim 3 wherein the glass lens assembly is configured to be vertically movable to adjust the position of the glass lens in a vertical direction.

5. The protective mask for ophthalmic treatment according to claim 3, wherein the elastic holding member is a wave ball screw, the wave ball screw includes a cylindrical shell, a wave ball and a spring, the cylindrical shell is screwed on the bracket and extends to the wall of the slot, the wave ball is disposed at one end of the cylindrical shell and protrudes from the wall of the slot, and the spring is disposed in the cylindrical shell and is held against the wave ball, so that the wave ball is held against the transparent plastic mask.

6. The ophthalmic therapeutic face shield of claim 4, wherein the glass lens assembly comprises:

a glass lens;

7. The ophthalmic-treatment protective mask of claim 6, wherein the drive assembly comprises:

8. The protective mask for ophthalmic treatment according to claim 7, wherein a fastener is provided on the glass lens, and a fastening hole adapted to be fastened with the fastener is provided on the sliding block.

9. The ophthalmic-treatment protective mask according to claim 2, wherein the front side of the frame is provided with a pivoting base, a spotlighting lamp is pivotally connected to the pivoting base, and the lighting lamp is pivotable about a horizontal axis to adjust an irradiation angle of the lighting lamp.

10. The ophthalmic therapeutic face shield of claim 9, wherein the frame is provided with an energy storage battery for powering the illumination light.