KR20070036954A - Afocal lens and ear endoscope using the same - Google Patents

Abstract

The present invention implements an infinite focus optical lens having a refractive index and dispersion set in an appropriate range, and discloses an ear endoscope capable of monitoring a body such as an ear requiring illumination using the infinite focus optical lens.

In the ear endoscope operated by a conventional power supply, the present invention includes a lens module including four groups of lenses to ensure a linear optical axis; A light source module providing irradiation light by using an optical fiber to the lens module by supplying the power; An imaging device disposed at a linear optical axis extension position of the lens module and configured to photograph an image projected through the lens module by supplying the power; And a switch for controlling the supply of the power, wherein the light source module, the image pickup device, and the switch are embedded in a case, and one end of the lens module is inserted.

Description

Infinite focus optical lens and ear endoscope using the same {Afocal lens and ear endoscope using the same}

1 shows an embodiment of an endless optical lens according to the present invention.

2 is a cross-sectional view showing an ear endoscope according to the present invention.

3 is a partial cutaway plan view illustrating a state in which a lens module is assembled to a case;

4 is a cross-sectional view illustrating an assembled state of the lens module.

5 is a cross-sectional view illustrating an exploded state of the lens module.

6 is a cross-sectional view illustrating a light source module.

The present invention relates to an infinite focus optical lens and an ear endoscope using the same, and particularly, to implement an infinite focus optical lens having a refractive index and a dispersion degree set in an appropriate range, and to the body such as an ear that requires illumination using the infinite focus optical lens. It is about ear endoscopy that can be monitored.

Imaging devices using imaging devices (hereinafter referred to as "CCD") are used in various fields, and in the medical device field, imaging devices using CCDs for endoscopes are applied.

In the medical field, the endoscope is used to photograph the necessary images by approaching the affected part of the patient, which is difficult for the doctor to directly see, and is applied to various fields such as internal medicine.

As described above, in order to obtain the necessary image by accessing the affected part of the patient which is difficult to see directly by the doctor, the lens module should be designed to observe with an appropriate focus. In particular, in order for a doctor to treat a part such as the ear, the lens module should be designed with an appropriate focus and the lighting should be designed to obtain a good image.

Accordingly, there is a desire for the development of an infinite focal optical lens and an ear endoscope using the same designed to satisfy the above requirements.

It is an object of the present invention to provide an infinite focal optical lens having a focal point where a doctor can monitor the inside of a patient's ear.

Another object of the present invention is to provide an ear endoscope provided with illumination while mounting a lens module having a focal point for the doctor to monitor the inside of the patient's ear.

Still another object of the present invention is to provide an ear endoscope having a shape and a function that are convenient for use by a doctor.

Infinite focus optical lens according to the present invention, the first lens and the second lens is a combination of the first group of lenses; A second group of lenses in which the third lens and the fourth lens are combined; A third group of lenses having a fifth lens; And a fourth group of lenses in which the sixth and seventh lenses are combined, and the refractive indices of the respective lenses are 1.80420, 1.80420, 1.84666, 1.48749, 1.51680, 1.51680 in the order of the seventh lens from the first lens. , The dispersion degree of each lens is defined as 46.50, 46.50, 23.83, 70.44, 64.20, 64.20, 25.46 in the order of the seventh lens from the first lens, the refractive index and the dispersion degree are respectively 5 It is constructed by applying a variable range within percentage.

In addition, the ear endoscope according to the present invention, in the ear endoscope operated by a normal power supply, comprising a lens module to ensure a linear optical axis while including four groups of lenses; A light source module providing irradiation light by using an optical fiber to the lens module by supplying the power; An imaging device disposed at a linear optical axis extension position of the lens module and configured to photograph an image projected through the lens module by supplying the power; And a switch for controlling the supply of the power, wherein the light source module, the image pickup device, and the switch are embedded in a case, and one end of the lens module is inserted.

Here, the switch may be configured as a magnetic switch.

The lens module includes a first tube having the first hollow and accommodating the first lens group in the first hollow; A second tube body having a second hollow and accommodating the second lens group in the second hollow; One end of which is fitted with one end of the first tube body, the other end of the second tube is fitted with one end of the coupling body for coupling both; A third tube accommodating the third lens group in the third hollow while having a third hollow, and one end of which is screwed with the other end of the second tubular body; An auxiliary tube to which the fourth lens group is coupled; And while having a fourth hollow, one end may be screwed with the other end of the third tube, and the other end may have a fourth tube that is screwed and accommodated.

The second to fourth pipe bodies, the connecting body, and the auxiliary pipe body are preferably embedded in the case, and the case has a structure having a handle and a beak in a general gun shape, and the lens module in the beak. This can be configured correspondingly.

The light source module may include: a holder for receiving an optical fiber bundle, one end of which is cut to be aligned and the other end of which extends toward the lens module; A fixing case having a hollow, and inserting the holder at one end and having a screw installed at a position at which the holder is inserted to fix the holder by tightening the screw; And a light source provided at another end of the fixed case to irradiate light toward the holder.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the infinite focus optical lens and the ear endoscope using the same will be described with reference to the accompanying drawings.

Referring to Figure 1, the infinite focus optical lens according to the present invention is composed of four groups of lenses.

 Lenses of the fourth group are divided into lenses of the first to fourth groups aligned on the same optical axis, and the first group of lenses is a combination of the first lens G1 and the second lens G2, and the second group of lenses. The lens of the third lens G3 and the fourth lens (G4) is combined, the lens of the third group includes a fifth lens (G5), the lens of the fourth group of the sixth lens (G6) and the third lens Seven lenses G7 are combined.

Here, the refractive index of each lens is designed to 1.80420, 1.80420, 1.84666, 1.48749, 1.51680, 1.51680, 1.80518 in order of the seventh lens from the first lens to implement infinite focus, wherein the dispersion of each lens is It is preferably designed as 46.50, 46.50, 23.83, 70.44, 64.20, 64.20, 25.46 from the first lens in the order of the seventh lens, the refractive index and the dispersion degree are each designed in a variable range within 5 percent according to the manufacturer's intention can be changed.

The material, radius, and distance between the lenses may be arbitrarily adjusted according to the manufacturer's intention to implement infinite focus in consideration of the refractive index and the degree of dispersion.

In the lens of the group 4, the lens of the first group serves as the objective lens, the lens of the fourth group serves as the alternative lens, and the lens of the second group and the lens of the third group are complementary combinations. In accordance with the present invention serves to deliver the image projected through the lens of the first group to the lens of the fourth group or to deliver the light provided from the lens of the second group to the lens of the first group.

And, according to the needs of the manufacturer, the prism P may be additionally installed on the front surface of the lens of the first group, and the prism P serves to compensate for the resolution of the subject.

The lens of group 4 of FIG. 1 may be accommodated in a lens module and used for an ear endoscope.

Specifically, referring to FIGS. 2 and 3, the ear endoscope 30 has a configuration in which the lens module 5 is assembled to a case 32 having a beak and a handle, and extended to an optical axis of the lens module 5. The imaging device 40 is mounted in the case 32 at the position, and the light source module 50 is mounted in the case 32 adjacent to the imaging device 40.

First, the configuration of the lens module 5 with reference to Figures 2 to 5, the lens module 5 is composed of the first to the fourth tube, the connecting body, and the auxiliary tube.

The first tubular body 10 is configured such that the first to third sub tubular bodies 10a, 10b, and 10c having different inner diameters are assembled to form a first hollow. Specifically, the third sub-tubular body 10c forms an outer wall of the first tubular body 10, and the second sub-tubular body 10b is longer than the third sub-tubular body 10c and has a length longer than that of the third sub-tubular body 10c. It has the same outer diameter as the inner diameter and is fitted inside the third sub-tubular body 10c, and the first sub-tubular body 10a is shorter than the second sub-tubular body and has the same outer diameter as the inner diameter of the second sub-tubular body 10b. It is fitted in the second sub-tubular body 10b. Here, the first group of lenses (G1, G2) is coupled to one end of the second sub-tubular body (10b), the other end of the second sub-tubular body (10b) is the first sub-tubular body (10a) and the third sub-tubular body It is inserted into the connector 12 in alignment with the corresponding end of 10c. The first sub-tubular body 10a and the third sub-tubular body 10c have a function of complementarily complementing the state coupled with the connecting body 12 while supporting the second sub-tubular body 10b interposed therebetween.

The connecting body 12 functions to fix and connect the first tube 10 and the second tube 14 at both ends, and for this purpose, the depth of insertion of the two tube bodies 10 and 14 coupled at both ends is adjusted. A jaw is formed for the purpose, and the jaw is formed to correspond to the thickness of the first tube body 10 and the second tube body 14 inserted at both ends. In addition, the connector 12 is formed with an outer wall having a size and shape corresponding to that of the connector 32 so as to be inserted into an end portion of the beak portion as described below, and a hook for locking the inside of the case 32. The jaw 12a is preferably formed on the outer wall.

And the 2nd tube 14 accommodates the said 2nd lens group G3 and G4 in a said 2nd hollow, having a 2nd hollow. Specifically, one end has a shape corresponding to the inner wall of the connecting body 12, and the other end is preferably formed with a jaw 14a and a threaded portion 14b for coupling with the third tube 16.

In addition, the third tube 16 has a third hollow and accommodates the third lens group G5 in the third hollow, and at one end a threaded portion 16a for screwing with the second tube 14 is formed. And a threaded portion 16b for screwing together with the fourth tube 18, which will be described later, at the other end.

In addition, the fourth pipe body 18 has a fourth hollow and at one end a threaded portion 18a for screwing with the third pipe body 16 is formed, and the other end thereof has a case 32 and an auxiliary pipe body 20. An engagement portion 18b for engagement is configured. Here, the coupling portion 18b includes a screw portion 18c of the outer wall for coupling with a predetermined screw portion configurable to the case 32 and a screw portion 18d formed on the inner wall to accommodate the auxiliary pipe 20 coaxially with the hollow. Is formed.

Here, the auxiliary pipe body 20 has a screw part for insertion into the threaded portion 18d of the fourth pipe body 18 on the outer wall, and has a structure in which the fourth lens groups G6 and G7 are accommodated therein.

The lens module 5 is assembled as shown in FIG. 4, and as a result, the remaining part of the first tube 10 except for a part is mounted in the case 32.

In addition, the imaging device 40 is installed in the case 32 on an extension line of the optical axis extending from the first hollow to the fourth hollow of the lens module 5, and the imaging device 40 is an eyepiece of the lens module 5. Preferably, the fourth lens groups G6 and G7 are installed adjacent to the position.

On the other hand, the light source module 50 that provides illumination for shooting is configured as shown in Figure 6, the optical fiber extending to the light source module 50 may be configured to extend toward the lens module 5, first, the light source module 50 ) Has a holder 54 that houses the optical fiber bundle 56 therein, the holder 54 is configured such that the optical fiber bundle 56 extends toward the lens module 5 at one end and the optical fiber bundle 56 at the other end. It is configured to be cut to be aligned. The holder 54 is inserted into the fixed case 52 having a hollow, and the holder 54 is provided with a screw 59 at a predetermined position where the holder 54 is inserted. Is configured to press the side wall of the. At the other end of the fixed case 52, a light source 58 such as a light emitting diode is provided to irradiate light.

Accordingly, light irradiated from the light source 58 is transmitted along the optical fiber bundle 56 toward the lens module 5, and light is provided in the above manner so that an image of the subject can be sensed by the imaging device 40. .

On the other hand, the ear endoscope 30 according to the present invention is preferably configured such that the wire 70 for receiving power is connected to the handle side, the magnetic switch 60 is configured for switching the power. That is, the power supplied to the imaging device 40, the light source module 50, and the like may be switched by the magnetic switch 60.

Since the magnetic switch 60 is a component that performs the on-off operation by magnetic force, it is preferable that a permanent magnet or an electromagnet for operating the magnetic switch 60 is configured in the handle mounting portion. By the configuration of the magnetic switch 60, the power supply can be turned off when the ear endoscope 30 is placed unused, and the power supply can be turned on when the ear endoscope 30 is used.

According to the present invention, the doctor can monitor the affected area such as the inside of the ear of the patient with the optimal focus, and can monitor the high-quality image by being provided with illumination in the optimal focus state.

In addition, the magnetic switch is configured to automatically turn on and off can provide convenience for use by the doctor.

Claims (8)

A first group of lenses in which the first lens and the second lens are combined; A second group of lenses in which the third lens and the fourth lens are combined; A third group of lenses having a fifth lens; And And a fourth group of lenses in which the sixth and seventh lenses are combined. The refractive indices of the lenses are defined as 1.80420, 1.80420, 1.84666, 1.48749, 1.51680, 1.51680, 1.80518 in the order of the seventh lens from the first lens, and the dispersion degree of each of the lenses is determined from the first lens to the seventh lens. Infinite focus optical lens, characterized in that is defined in the order of 46.50, 46.50, 23.83, 70.44, 64.20, 64.20, 25.46, wherein the refractive index and the dispersion degree are each applied in a variable range within 5 percent. In the ear endoscope operated by the normal power supply, A lens module including four groups of lenses and ensuring a linear optical axis; A light source module providing irradiation light by using an optical fiber to the lens module by supplying the power; An imaging device disposed at a linear optical axis extension position of the lens module and configured to photograph an image projected through the lens module by supplying the power; And A switch for controlling the supply of the power; The light source module, the image pickup device, and the switch are embedded in a case, and the lens module is configured to insert one end of the ear endoscope; The method of claim 2, The switch is ear end, characterized in that consisting of a magnetic switch. The method of claim 2, wherein the lens module, A first group of lenses in which the first lens and the second lens are combined; A second group of lenses in which the third lens and the fourth lens are combined; A third group of lenses having a fifth lens; And And a fourth group of lenses in which the sixth and seventh lenses are combined. The refractive indices of the lenses are defined as 1.80420, 1.80420, 1.84666, 1.48749, 1.51680, 1.51680, 1.80518 in the order of the seventh lens from the first lens, and the dispersion degree of each of the lenses is determined from the first lens to the seventh lens. Ear endoscopes defined as 46.50, 46.50, 23.83, 70.44, 64.20, 64.20, 25.46 in the order of, wherein the refractive index and the dispersion degree are each applied in a variable range within 5 percent. The method of claim 4, wherein the lens module, A first tube body having a first hollow and accommodating the first lens group in the first hollow; A second tube body having a second hollow and accommodating the second lens group in the second hollow; One end of which is fitted with one end of the first tube body, the other end of the second tube is fitted with one end of the coupling body for coupling both; A third tube having the third hollow and accommodating the third lens group in the third hollow, one end of which is screwed with the other end of the second tube; An auxiliary tube to which the fourth lens group is coupled; And An endoscope having a fourth hollow, wherein one end is screwed with the other end of the third tube, and the other end has a fourth tube with which the auxiliary tube is screwed and received. The method of claim 5, The second to fourth tube, the connecting body, and the auxiliary tube is an ear endoscope, characterized in that embedded in the case. The method of claim 6, The case has a structure having a handle and a beak in a general gun shape, the endoscope, characterized in that the lens module is configured to correspond to the beak. The method of claim 5, wherein the light source module, A holder for receiving an optical fiber bundle, one end of which is cut in alignment and the other end of which extends toward the lens module; A fixing case having a hollow, and inserting the holder at one end and having a screw installed at a position at which the holder is inserted to fix the holder by tightening the screw; And And an light source provided at the other end of the fixed case to irradiate light toward the holder.

Images