TWI512337B - Illumination unit and intracorporeal illumination system - Google Patents

Description

Lighting unit and internal lighting system

The present invention relates to an optical unit and an optical system, and more particularly to a lighting unit and an in-vivo lighting system.

When performing an open surgery, the flap is usually fixed with a safety loop opener (Alexis Wound Retractor) to facilitate the doctor to go inside the body for surgery. During the operation, an external light source such as an astral lamp is usually used to illuminate the operative area. However, the range of illumination of external sources is limited. For some dead angles in the body, it is usually necessary to use the internal light source as an auxiliary illumination. The main body light source currently used is the light source of the endoscope. However, the illumination source of the endoscope has a narrow range of illumination, which only illuminates the front of the endoscope so that its surroundings are still dark. Therefore, when the scope of surgery is large or deep, the doctor can only enlarge the knife opening to enhance the illumination of the knife area to avoid the impact of the operation due to insufficient light.

In view of the above, how to provide a lighting unit that does not harm the human body and is suitable for fixing on a common component in surgery to provide sufficient illumination during surgery is one of the problems that researchers are currently trying to solve.

The present invention provides a lighting unit that does not harm the human body and is adapted to be secured to common components in surgery to provide adequate illumination during surgery.

The present invention provides an in vivo illumination system that is capable of providing sufficient illumination during surgery.

A lighting unit of the present invention includes a secondary optical element and a light emitting element. The secondary optical element includes a Fresnel lens portion and a total reflection lens portion surrounding the Fresnel lens portion. The light-emitting element emits a light beam toward the secondary optical element, wherein the light beam is respectively refracted once upon entering and exiting the Fresnel lens portion. The light beams are respectively refracted once into and out of the total reflection lens portion and are totally reflected once in the total reflection lens portion.

In an embodiment of the invention, the Fresnel lens portion and the total reflection lens portion share a central axis, and the light-emitting element is disposed on the central axis and adjacent to a focus of the Fresnel lens portion.

In an embodiment of the invention, the angle between the light beam incident on the Fresnel lens portion and the optical axis of the light-emitting element falls within a range of 0 to 60 degrees, and the light beam and the light-emitting element incident on the total reflection lens portion The angle of the optical axis falls within the range of 61 to 90 degrees.

In an embodiment of the invention, the secondary optical element has a light exiting surface. The Fresnel lens portion has a plurality of first light incident surfaces. Each of the first light incident surfaces is located between the light emitting surface and the light emitting element and is inclined with respect to the light emitting surface. The angle between the first light incident surface and the reference plane parallel to the light exit surface increases in a direction away from the center of the Fresnel lens portion. plus.

In an embodiment of the invention, the first light incident surface farthest from the center of the Fresnel lens portion is connected to the total reflection lens portion.

In an embodiment of the invention, the Fresnel lens portion further has a plurality of connecting surfaces, and each connecting surface is connected between the adjacent two first light incident surfaces, and each connecting surface and the optical axis of the light emitting element The angle of the clip falls within the range of 0 to 3 degrees.

In an embodiment of the invention, the total reflection lens portion includes a plurality of second light incident surfaces and a plurality of total reflection surfaces. The second light incident surface and the total reflection surface are alternately arranged in a direction away from the center of the Fresnel lens portion. After entering the total reflection lens portion from the second light incident surface, the light beam is totally reflected inside the total reflection surface to the light exit surface, and is emitted from the light exit surface.

In an embodiment of the invention, the second light incident surface closest to the center of the Fresnel lens portion is connected to the first light incident surface farthest from the center of the Fresnel lens portion.

In an embodiment of the invention, the number of the first light incident surfaces is six, and the number of the second light incident surfaces is four.

In an embodiment of the invention, each of the total reflection surfaces is a curved surface.

In an embodiment of the invention, the angle between each of the second light incident surfaces and the optical axis of the light emitting element falls within a range of 0 to 3 degrees.

An in-vivo illumination system of the present invention includes a safety loop type opener spreader and a plurality of illumination units disposed on the safety loop type opener spreader. Each lighting unit includes a secondary optical element and a light emitting element. Secondary optical element including Fresnel lens section And a total reflection lens portion surrounding the Fresnel lens portion. The light-emitting element emits a light beam toward the secondary optical element, wherein the light beam is respectively refracted once upon entering and exiting the Fresnel lens portion. The light beams are respectively refracted once into and out of the total reflection lens portion and are totally reflected once in the total reflection lens portion.

Based on the above, the illumination unit of the above-described embodiment of the present invention utilizes the design of the secondary optical element to converge the light beam emitted by the light-emitting element to improve the luminous efficiency of the illumination unit. Since the secondary optical element can be thinned by the Fresnel lens portion and the total reflection lens portion, and the serrated surfaces of the Fresnel lens portion and the total reflection lens portion face the light-emitting elements, the illumination unit can be harmless to the human body and suitable for It is fixed on common components in surgery (such as safety ring opener) to provide sufficient illumination during surgery. Moreover, since the illumination unit has high luminous efficiency, the internal illumination system can reduce the number of illumination units used under the required illumination, thereby reducing the heat and temperature generated by the illumination elements in the illumination system of the body.

The above described features and advantages of the invention will be apparent from the following description.

10‧‧‧In-vivo lighting system

12‧‧‧Safety ring opener

12a‧‧‧First support

12b‧‧‧Connecting Department

12c‧‧‧second support

14, 100‧‧‧ lighting unit

14a, 120‧‧‧Lighting elements

14b, 110‧‧‧ secondary optical components

112‧‧‧Fresnel lens

114‧‧‧ Total reflection lens section

A, B‧‧‧ area

C‧‧‧ connection surface

E‧‧‧Glossy

F‧‧‧ focus

FPC‧‧‧Soft Board

I11, I12, I13, I14, I15, I16‧‧‧ first light surface

I21, I22, I23, I24‧‧‧ second light surface

L‧‧‧beam

LT‧‧‧Carmen

O‧‧‧ center axis

R‧‧‧ reference plane

T‧‧‧ total reflection surface

W‧‧‧Width

Θ1, θ2, θ3, θ4, θ5, θ6, θ112, θ114, θC, θI2‧‧‧ angle

A-A’, B-B’‧‧‧ cut line

1A is a bottom plan view of a lighting unit in accordance with an embodiment of the present invention.

Fig. 1B is a schematic cross-sectional view taken along line A-A' of Fig. 1A.

1C and 1D are enlarged schematic views of a region A and a region B in Fig. 1B, respectively.

2 is an illuminance distribution diagram of a conventional illumination unit for evaluating luminous efficiency.

Fig. 3 is a illuminance distribution diagram of an illumination unit for evaluating luminous efficiency according to an embodiment of the present invention.

4 is a schematic diagram of an in vivo illumination system in accordance with an embodiment of the present invention.

5A is a partial top plan view of the in vivo illumination system of FIG. 4.

Fig. 5B is a schematic cross-sectional view taken along line B-B' in Fig. 5A.

1A is a bottom plan view of a lighting unit in accordance with an embodiment of the present invention. Fig. 1B is a schematic cross-sectional view taken along line A-A' of Fig. 1A. 1C and 1D are enlarged schematic views of a region A and a region B in Fig. 1B, respectively. Referring to FIGS. 1A through 1D , the illumination unit 100 includes a secondary optical component 110 and a light emitting component 120 . The secondary optical element 110 includes a Fresnel lens portion 112 and a total reflection lens portion 114 surrounding the Fresnel lens portion 112. In the present embodiment, the Fresnel lens portion 112 and the total reflection lens portion 114 are connected to each other and are integrally formed, for example. Further, the Fresnel lens portion 112 and the total reflection lens portion 114 share a central axis O, wherein the light-emitting element 120 is located on the central axis O and adjacent to the focal point F of the Fresnel lens portion 112, and the light-emitting element 120 is adapted to face two The secondary optical element 110 emits a light beam L.

The secondary optical element 110 has a light-emitting surface E, and the light-emitting surface E is, for example, a plane, and the surface of the secondary optical element 110 opposite to the light-emitting surface E is, for example, a zigzag surface. In detail, the Fresnel lens portion 112 has a plurality of first light incident surfaces (ie, Fresnel The first light incident surface I11, I12, I13, I14, I15, I16) indicated by the thick line in the lens portion 112, wherein the first light incident surface I16 farthest from the center of the Fresnel lens portion 112 is connected to the whole The reflecting lens portion 114.

Each of the first light incident surfaces I11, I12, I13, I14, I15, and I16 is located between the light emitting surface E and the light emitting element 120 and is inclined with respect to the light emitting surface E, wherein the light beam L passes from the air medium through the first light incident surface I11, I12, When I13, I14, I15, and I16 enter the Fresnel lens portion 112, primary refraction occurs, and another refraction occurs when the light exiting surface E is emitted to the air medium. In other words, the light beam L is refracted once each time entering and exiting the Fresnel lens portion 112.

By controlling the angles θ1, θ2, θ3, θ4, θ5, θ6 of the first light incident surface I11, I12, I13, I14, I15, I16 and a reference plane R parallel to the light exit surface E, the modulation can be modulated. The light shape distribution output from the Fresnel lens portion 112. In this embodiment, the angles θ1, θ2, θ3, θ4, θ5, θ6 of the first light incident surface I11, I12, I13, I14, I15, and I16 and a reference plane R parallel to the light exit surface E are away from each other. The direction of the center of the Fresnel lens portion 112 increases. For example, the angles θ1, θ2, θ3, θ4, θ5, θ6 are, for example, 30 degrees, 34.3 degrees, 37.41 degrees, 39.8 degrees, 40.5 degrees, and 41.24 degrees, respectively, but the present invention is not limited thereto.

Further, the angle θ112 between the light beam L incident on the Fresnel lens portion 112 and the optical axis of the light-emitting element 120 (i.e., the central axis O) falls within a range of 0 to 60 degrees. For example, the angle θ 112 between the light beam L incident on the first light incident surface I11, I12, I13, I14, I15, and I16 and the optical axis of the light emitting element 120 falls within, for example, 0 to 18 degrees, respectively, 18.1 Range up to 32.6 degrees, range from 32.7 degrees to 42.5 degrees Within the range of 42.6 degrees to 49.2 degrees, in the range of 49.3 degrees to 55.4 degrees, and in the range of 55.5 degrees to 60 degrees. However, the invention is not limited to the above. Depending on the number of first light incident surfaces, the degree of tilt of the first light incident surface, the desired light shape distribution, etc., the first light incident surface (referred to as the first light incident surface I11, I12, I13, I14, The angle L of the light beam L of either of I15 and I16 and the optical axis of the light-emitting element 120 is also different.

In addition, the Fresnel lens portion 112 further has a plurality of connection faces C (shown by thin lines in the Fresnel lens portion 112), and each connection face C is connected to two adjacent first light incident faces (refer to the first light incident) Between the faces I11, I12, I13, I14, I15, I16). Considering the mechanical strength of the entire Fresnel lens portion 112, the angle θC between the respective connection faces C and the optical axis of the light-emitting element 120 falls within a range of, for example, 0 to 3 degrees (see FIG. 1C). Further, in order to reduce the influence of the angle θC on the luminous efficiency, the angle θC between the respective connection faces C and the optical axis of the light-emitting element 120 preferably falls within the range of 0 to 1 degree.

The total reflection lens portion 114 includes a plurality of second light incident surfaces (that is, second light incident surfaces I21, I22, I23, and I24 indicated by thick lines in the total reflection lens portion 114, which are closest to the Fresnel lens portion 112. The second second light incident surface I21 of the center is connected to the first light incident surface I16 farthest from the center of the Fresnel lens portion 112) and the plurality of total reflection surfaces T (shown by thin lines in the total reflection lens portion 114), wherein The number of the second light incident surfaces is the same as the number of total reflection surfaces T, and the second light incident surfaces I21, I22, I23, I24 and the total reflection surface T are alternately arranged in a direction away from the center of the Fresnel lens portion 112.

The light beam L is once refracted from the air medium entering the total reflection lens portion 114 through the second light incident surface I21, I22, I23, and I24, and enters the total reflection lens portion 114. The light beam L is totally totally reflected inside the total reflection surface T to the light exit surface E, and another refraction occurs when the light exit surface E is emitted to the air medium. In other words, the light beam L is refracted once and enters the total reflection lens portion 114 once and is totally reflected once in the total reflection lens portion 114.

In the present embodiment, the angle θ114 between the light beam L incident on the total reflection lens portion 114 and the optical axis of the light-emitting element 120 falls within the range of 61 to 90 degrees. In other words, the total reflection lens portion 114 is for collecting the light beam L at a large angle emitted from the light-emitting element 120. In order to have a good concentrating effect, each total reflection surface T is, for example, a curved surface, wherein the radius of curvature of the curved surface can be determined depending on different design requirements. Further, considering the mechanical strength of the entire total reflection lens portion 114, the angle θI2 between the respective second light incident surfaces I21, I22, I23, and I24 and the optical axis of the light emitting element 120 falls within, for example, 0 to 3 degrees. (Fig. 1D schematically only shows the angle θI2 between the second light incident surface I22 and the optical axis of the light emitting element 120).

In addition, in order to obtain a better luminous efficiency and reduce the size and thickness of the secondary optical element 110, the number of the first light incident surfaces of the embodiment is 6, and each of the first light incident surfaces maintains an equal interval, and the second input The number of smooth surfaces and total reflection surface T is 4, respectively. In the above configuration, the radius of the Fresnel lens portion 112 is, for example, 3.46 mm, and the radius and thickness of the secondary optical element 110 are, for example, 14.15 mm and 5.4 mm, respectively, but the present invention is not limited thereto. Those skilled in the art can optimize the number of first light incident surfaces, the spacing of each first light incident surface, and the number according to different design requirements (such as the size of secondary optical element 110, the required light shape distribution, etc.) Design parameters such as the number of diffractive surfaces and the number of total reflection surfaces T.

2 is an illuminance distribution diagram of a conventional illumination unit for evaluating luminous efficiency. Fig. 3 is a illuminance distribution diagram of an illumination unit for evaluating luminous efficiency according to an embodiment of the present invention. Further, FIG. 2 is an illuminance distribution map measured under the fact that the illuminating element is not provided with the secondary optical element, and FIG. 3 is an illuminance distribution diagram of the illuminating unit 100 in FIG. 1B. 2 and 3, in the case where the secondary optical element is not provided, the light shape of the conventional illumination unit (light-emitting element) is relatively divergent and the luminous efficiency is low, and the secondary optical element can be effectively provided under the provision of the secondary optical element. The concentrated beam of light emitted from a large angle makes the beam emitted from the illumination unit more concentrated, and the luminous efficiency of the illumination unit is effectively improved.

4 is a schematic diagram of an in vivo illumination system in accordance with an embodiment of the present invention. 5A is a partial top plan view of the in vivo illumination system of FIG. 4. Fig. 5B is a schematic cross-sectional view taken along line B-B' in Fig. 5A. Referring to FIG. 4, FIG. 5A and FIG. 5B, the internal illumination system 10 includes a safety ring type open extension device 12 and a plurality of illumination units 14 disposed on the safety ring type open extension holder 12, wherein the illumination unit 14 is, for example, The lighting unit 100 in Figures 1A-1D.

The safety ring type open mouth spreader 12 includes, for example, a first support portion 12a, a connecting portion 12b, and a second support portion 12c, wherein the connecting portion 12b is connected between the first support portion 12a and the second support portion 12c. When the surgery is performed, the first support portion 12a and the second support portion 12c are opposed to each other and separated from each other, and the first support portion 12a is closer to the knife edge than the second support portion 12c.

The lighting unit 14 is disposed on the first support portion 12a to illuminate the inside of the body. In detail, each lighting unit 14 can be dispersed, for example, first on a flexible circuit board FPC. The light-emitting element 14a of each of the illumination units 14 is soldered on the flexible circuit board FPC, for example, and the secondary optical element 14b of each illumination unit 14 is fixed to the soft state by, for example, at least one latch LT connected thereto. On the board FPC. Next, the flexible circuit board FPC is packaged on the first support portion 12a. As such, the fabrication of the in-vivo illumination system 10 is initially completed. In another embodiment, the secondary optical element 14b can also be fixed to the first support portion 12a through an adhesive layer (not shown). The type of the adhesive layer is not limited to a layer, and it may be a gel, a block, or the like.

In order to make the internal illumination system 10 suitable for being disposed inside the human body, the material for the flexible circuit board FPC and the material of the secondary optical component 14b are preferably made of a material usable by a doctor, and the material is preferably elastic. It is not easily deformed and can withstand the temperature generated by the light-emitting element 14a. For example, the material of the secondary optical element 14b is, for example, polymethylmethacrylate (PMMA) or silicone rubber. Further, in order to enable the illumination unit 14 to be disposed on the first support portion 12a. The size of the light-emitting element 14a and the width W of the flexible circuit board FPC must be matched with the first support portion 12a. For example, the size of the light-emitting element 14a is, for example, less than 4 mm, and the width W of the flexible circuit board FPC is, for example, equal to 4 mm.

Since the internal illumination system 10 needs to be placed in the body for illumination, it is necessary to consider whether the internal illumination system 10 is harmful to the human body. In the present embodiment, since the secondary optical element 14b can be thinned by the aforementioned Fresnel lens portion 112 (see FIG. 1B) and the total reflection lens portion 114 (see FIG. 1B), and the secondary optical element 14b is The serrated faces are all facing the illuminating element 14a, so the illuminating unit 14 is adapted to be fixed on the safety loop type open ventilator 12, and can avoid being oversized or sharp at the edges. Injury the human body. In addition, since the illumination unit 14 has high luminous efficiency, the in-vivo illumination system 10 can reduce the number of using the illumination unit 14 under the required illumination, thereby reducing the amount of heat generated by the illumination element 14a in the in-vivo illumination system 10. temperature.

In summary, the illumination unit of the present invention utilizes the design of the secondary optical element to concentrate the light beam emitted by the light-emitting element to improve the luminous efficiency of the illumination unit. Since the secondary optical element can be thinned by the Fresnel lens portion and the total reflection lens portion, and the serrated surfaces of the Fresnel lens portion and the total reflection lens portion face the light-emitting elements, the illumination unit can be harmless to the human body and suitable for It is fixed on common components in surgery (such as safety ring opener) to provide sufficient illumination during surgery. Moreover, since the illumination unit has high luminous efficiency, the internal illumination system can reduce the number of illumination units used under the required illumination, thereby reducing the heat and temperature generated by the illumination elements in the illumination system of the body.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Lighting unit

110‧‧‧Secondary optical components

112‧‧‧Fresnel lens

114‧‧‧ Total reflection lens section

120‧‧‧Lighting elements

A, B‧‧‧ area

C‧‧‧ connection surface

E‧‧‧Glossy

F‧‧‧ focus

I11, I12, I13, I14, I15, I16‧‧‧ first light surface

I21, I22, I23, I24‧‧‧ second light surface

L‧‧‧beam

O‧‧‧ center axis

R‧‧‧ reference plane

T‧‧‧ total reflection surface

Θ1, θ2, θ3, θ4, θ5, θ6, θ112, θ114‧‧‧ angle

Claims (11)

A lighting unit comprising: a secondary optical element comprising a Fresnel lens portion and a total reflection lens portion surrounding the Fresnel lens portion; and a light emitting element emitting a light beam toward the secondary optical element, wherein The light beam is respectively refracted once when entering and exiting the Fresnel lens portion, and the light beam is respectively refracted once when entering and exiting the total reflection lens portion, and is totally reflected once in the total reflection lens portion, wherein the phenanthrene is incident The angle between the light beam of the Ner lens portion and the optical axis of the light-emitting element falls within a range of 0 to 60 degrees, and the angle between the light beam incident on the total reflection lens portion and the optical axis of the light-emitting element It falls within the range of 61 to 90 degrees. The illumination unit of claim 1, wherein the Fresnel lens portion and the total reflection lens portion share a central axis, and the light-emitting element is located on the central axis and adjacent to a focus of the Fresnel lens portion. Settings. The illumination unit of claim 1, wherein the secondary optical element has a light-emitting surface, the Fresnel lens portion has a plurality of first light-incident surfaces, and each of the first light-incident surfaces is located on the light-emitting surface An angle between the first light incident surface and a reference plane parallel to the light exit surface increases toward a direction away from a center of the Fresnel lens portion. The illumination unit according to claim 3, wherein the first light incident surface farthest from the center of the Fresnel lens portion is connected to the total reflection lens portion. The lighting unit according to claim 3, wherein the Fresnel is transparent The mirror portion further has a plurality of connecting surfaces, each of the connecting surfaces is connected between the adjacent two first light incident surfaces, and an angle between each of the connecting surfaces and the optical axis of the light emitting element falls between 0 and 3 degrees. In the range. The illumination unit of claim 3, wherein the total reflection lens portion includes a plurality of second light incident surfaces and a plurality of total reflection surfaces, and the second light incident surfaces and the total reflection surfaces are alternately along Arranged away from the center of the Fresnel lens portion, the light beam enters the total reflection lens portion from the second light incident surface, and is totally reflected internally to the light exit surface on the total reflection surface, and is emitted from the light exit surface . The illumination unit of claim 6, wherein the second light incident surface closest to the center of the Fresnel lens portion is connected to the first light incident surface farthest from the center of the Fresnel lens portion. . The lighting unit of claim 6, wherein the number of the first light incident surfaces is 6, and the number of the second light incident surfaces is 4. The lighting unit of claim 6, wherein each of the total reflection surfaces is a curved surface. The illumination unit of claim 6, wherein an angle between each of the second light incident surfaces and an optical axis of the light emitting element falls within a range of 0 to 3 degrees. An internal illumination system comprising: a safety ring type open ventral opener; and a plurality of illumination units disposed on the safety ring type open ventilator, each of the illumination units comprising: a secondary optical element, including a Fresnel Lens part and a surrounding Philippine a total reflection lens portion of the Ner lens portion; and a light-emitting element that emits a light beam toward the secondary optical element, wherein the light beam is respectively refracted once entering and exiting the Fresnel lens portion, the light beam entering and exiting The total reflection lens portion is respectively refracted once and is totally reflected once in the total reflection lens portion, wherein an angle between the light beam incident on the Fresnel lens portion and the optical axis of the light-emitting element falls between 0 and 60 degrees Within the range of degrees, the angle between the light beam incident on the total reflection lens portion and the optical axis of the light-emitting element falls within a range of 61 to 90 degrees.