KR101545163B1

KR101545163B1 - Optical system of medical microscope

Info

Publication number: KR101545163B1
Application number: KR1020150050724A
Authority: KR
Inventors: 김병장; 안명천; 김은경
Original assignee: (주)메가메디칼
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2015-08-19

Abstract

The present invention relates to an optical system of a medical microscope. The optical system of a microscope provides a magnified image of an object to be measured. The optical system of a microscope related to an embodiment of the present invention includes a common main objective (CMO) lens having one side facing the object to be measured; a pair of turret-type lenses which have one side facing the other side of the CMO lens and of which magnification is changed by a turret; and eyepieces having one side facing the other side of the turret-type lenses. Each beam penetrating through the eyepieces penetrates through each turret-type lens. The beams penetrated through the turret-type lenses are focused by the CMO lens. Optical axes of the turret-type lenses are parallel to each other. The magnification of the turret-type lenses can be the same. The present invention is capable of providing the microscope with the eyepieces of which the optical axes are identical.

Description

[0001] Optical system of medical microscope [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical system of a medical microscope, and more particularly, to an optical system of a medical microscope designed so that optical axes of both eyes are parallel for 3D diagnosis.

The microscope is a type of magnifying glass that is used to control microstructures that can not be visually distinguished, consisting of front and rear lens groups, that is, objective lens and eyepiece lens group.

Such a microscope has been developed and widely used as a stereo type having two eyepiece portions to observe an object in three dimensions using two eyes of an observer.

Stereo microscopes have also been developed for use in surgical operations. Such a stereoscopic microscope for surgery is being developed to observe objects not only directly through an eyepiece but also to realize and observe virtual reality.

A stereo-type microscope has a type of Greenough in which the optical axis of the objective lens system forms an engineering angle to observe an object.

FIG. 1 is a diagram showing an optical system of a microscope type. In FIG. 1, there is a problem that the optical axes of the two microscopes are not parallel to each other, resulting in image distortion that varies in size between the left and right sides. That is, the images formed on the left and right sides of the eyepiece are slightly different from each other, so that they do not completely coincide when the two images are matched.

In addition, in the case of such a conventional microscope, zooming is continuously changed. However, since the magnifications of the left and right sides do not coincide with each other, the sizes of the respective images are different from each other, causing dizziness. In order to solve this problem, there is a problem that a complicated calculation process is required.

Therefore, it is very difficult to use the microscope for a long period of time.

In order to solve such a problem, development of an optical system of a microscope is required to prevent vertical parallax in both eyes.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a microscope having parallel optical axes to a user.

Specifically, the object is to eliminate the vertical parallax in both eyes by using a turret type objective lens.

It is also an object of the present invention to provide a microscope optical system that does not cause dizziness during use to a user.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

In order to achieve the above object, there is provided a microscope optical system for forming an enlarged image of an object to be observed, comprising: a CMO lens having one side facing the object to be observed; A pair of turret type lenses whose one side faces the other side of the CMO lens and whose magnification is changed by a turret; And an eyepiece lens having one side facing the other side of the pair of turret type lenses, each of the rays passing through the pair of eyepiece lenses passes through each of the pair of turret type lenses, The light rays passing through the turret type lens are focused by the CMO lens, the optical axes of the pair of turret type lenses are parallel to each other, and the magnifications of the pair of turret type lenses may be equal to each other.

Each of the pair of turret type lenses includes a plurality of sub-lenses, and the curvatures of at least one sub-lens of the plurality of sub-lenses are different from each other. The magnification of the pair of turret type lenses can be changed by rotating the axis perpendicular to the optical axis to invert the lower lenses having different curvatures on both sides.

A pair of turret lens elements disposed between the pair of turret type lenses and the pair of eyepiece lenses so that light rays passing through the pair of eyepiece lenses pass through the pair of turret type lenses, And a sub prism.

A pair of CCTV lenses receiving the light beams passing through the pair of turret type lenses; And a pair of turret type lenses and a pair of eyepiece lenses, wherein the pair of turret type lenses reflects a part of the light rays passing through the pair of turret type lenses and sends them to the pair of CCTV lenses, And a beam splitter for transmitting a part of the light beams passing through the objective lens to the pair of eyepiece lenses.

The illumination unit may further include a light source for generating light, an optical fiber for transmitting the generated light, and a prism for reflecting the light transmitted from the optical fiber and supplying the light to the other side of the CMO lens, May be located between any one of the CMO lens and the pair of turret type lenses.

The illumination unit may further include a color filter disposed between the optical fiber and the prism and passing light having a wavelength within a predetermined range.

The color filter may include a green color filter, an orange color filter, a blue color filter, a yellow color filter, and an infrared color filter.

The present invention can provide the user with a microscope whose binocular optical axis is parallel.

Specifically, by using a turret type objective lens, vertical parallax in both eyes can be eliminated.

In addition, it is possible to provide a user with an optical system of a microscope which does not cause dizziness during use.

Further, by using a color filter, it is possible to provide a user with an optical system of a microscope capable of easily grasping a lesion.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
Fig. 1 is a drawing showing an optical system of a microscope of the Ginou type.
2 is a cross-sectional view showing a microscope optical system according to one embodiment of the present invention.
3 is an external view of a microscope using an optical system according to an embodiment of the present invention.
4 is an external view of a turret portion of a microscope using an optical system according to an embodiment of the present invention.
5 is a diagram illustrating light rays of CMO lenses of different focuses according to one embodiment of the present invention.
6A-6C are photographs of veins observed using a different type of color filter according to one embodiment of the present invention.
7A and 7B are photographs showing tumor cells using a white color filter and a blue color filter according to an embodiment of the present invention.

As described above, the conventional Grimm's type microscope has a problem in that a vertical parallax of both eyes is generated by using a continuous zoom type objective lens, thereby generating keystone distortion and causing dizziness of the user.

In this specification, an optical system of a microscope capable of solving the above problems is proposed.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

2 is a cross-sectional view showing a microscope optical system according to one embodiment of the present invention.

However, the components shown in Fig. 2 are not essential, and a microscopic optical system having components having more or fewer components may be implemented.

2, the microscope optical system of the present invention includes objective parts 100 and 200, an eyepiece 300, a head part prism 400, a CCTV lens 500, a beam splitter 600, an illumination part 700, A color filter 800, and the like.

First, the object parts 100 and 200 include an objective lens that forms an enlarged image of an object. In the present invention, the objectives 100 and 200 may include a pair of turret type lenses 100 and a common main objective (CMO) lens 200.

The turret type lens 100 is a lens that realizes a plurality of magnifications determined by mounting a plurality of lenses on a turntable, that is, a turret. In other words, unlike the continuous zoom type lens in which the magnification can be finely adjusted, the turret type lens 100 can be regarded as a discontinuous zoom type since it creates an enlarged image of an object at a predetermined multiple magnification.

A rotating plate used for replacing an objective lens in a general microscope rotates about the optical axis of the optical system. However, the turret type lens 100 of the present invention rotates about a line orthogonal to the optical axis unlike the above. That is, it rotates about the line 130 shown in FIG.

The magnification of the turret-type lens 100 of the present invention is not changed by the lens itself as in a general microscope, and when the turret is rotated about the line 130, it is included in the turret-type lens 100 of FIG. 2 The positions of the left lower lens 110 and the right lower lens 120 change each other and the magnification changes as the surfaces of the respective lenses facing the object are reversed.

This is accomplished by different curvatures of the left and right lower lenses 110 and 120 constituting the turret type lens 100 and the number of inner lenses constituting the turret type lens 100 is different from that shown in FIG. The number of magnifications that can be realized by the turret type lens 100 can be increased.

A method of changing the magnification of the turret type lens 100 is as follows.

FIG. 3 is an external view of a microscope using an optical system according to one embodiment of the present invention, and FIG. 4 is an external view of a turret of a microscope using an optical system according to an embodiment of the present invention.

The appearance of the microscope using the optical system of the present invention may be the same as that of Fig. 3, and an example of the appearance of the turret portion of this microscope is shown in Fig. It is possible to change the magnification of the turret type lens 100 by rotating the both rotating knobs of the turret portion shown in Fig.

As shown in Figs. 3 and 4, the rotation axis of both the rotary knobs is orthogonal to the optical axis as described above.

As described above, the turret-type lens 100 can magnify an image of the object at a plurality of magnifications determined by the rotation of the turret, and the pair of lenses have the same magnification (any magnification of a predetermined multiple magnification) The vertical parallax does not occur in the optical axis of both eyes. Therefore, the keystone distortion does not occur and the user does not cause dizziness.

Next, a common main objective (CMO) lens 200 focuses a light beam passing through a pair of turret type lenses at the tip of the optical system of the present invention to focus on an observation object, The lens compensates for discontinuity. That is, unlike the continuous zoom type lens, the turret type lens 100 according to the present invention can not finely adjust the magnification, so that the interval between the discontinuous magnification periods is compensated by adjusting the focus of the CMO lens 200.

5 is a diagram illustrating light rays of CMO lenses of different focuses according to one embodiment of the present invention.

Referring to FIG. 5, the focus is changed by changing the positions of the two lenses constituting the CMO lens 200 and the distance between the two lenses. In the present invention, the focus adjustment of the CMO lens 200 can be finely adjusted manually, so that the discontinuity of the magnification of the turret type lens 100 can be compensated.

Next, the eyepiece 300 is a lens that is disposed in front of a position where the eye of the optical system is placed. In addition, if the microscope is connected to the video output device, it is disposed in front of the camera lens of the video output device.

Since the optical system of the present invention belongs to an optical system of a stereoscopic microscope capable of realizing a 3D image, the pair of eyepieces 300 are provided as shown in FIG. 2 and FIG.

Since the eyepiece 300 is a lens for enlarging an image of an object made by the objective lens, the eyepiece 300 can be composed of a plurality of lenses to enlarge the image.

Next, the head portion prism 400 is positioned between the objective portions 100 and 200 and the eyepiece 300. The head portion prism 400 includes a turret type lens So that the light beams emitted from the light source 200 are directed to the right and left lenses.

That is, referring to FIG. 2, light rays from each of the turret type lenses 100 of the objective part are reflected through the head part prism 400, and each ray is directed to each eyepiece 300.

A pair of head prisms 400 are provided in the same manner as a pair of the turret type lens 100 and the eyepiece 300 are provided.

Next, the CCTV lens 500 is a lens, that is, a camera lens, for receiving a light beam emitted from an object and outputting an image.

The CCTV lens 500 requires a device such as a beam splitter 600 to receive light rays from the object before passing through the eyepiece 300. [

The beam splitter 600 is disposed between the objective portion and the head portion prism 400 and includes a split portion formed at an angle with respect to the optical axis of the objective portion as shown in Fig.

This beam splitter 600 reflects a portion of the light rays coming from the object and changes the path so that the reflected light rays are directed to the CCTV lens 500 and the remaining part of the light rays coming from the object passes through the beam splitter 600 To face the head portion prism 400.

Although one CCTV lens and beam splitter 600 are shown in FIG. 2, a pair of CCTV lens 500 and beam splitter 600 are also provided to receive both light beams from the pair of turret type lenses 100 .

Next, the illumination unit 700 supplies light for better observation of an object, thereby facilitating efficient diagnosis and operation by a medical microscope.

The illumination unit 700 may include a light source 710, an optical fiber 720, and a prism 730 to supply light. That is, the light outputted from the light source 710 is transmitted to the prism 730 by the optical fiber 720, and the prism 730 reflects the transmitted light so that the light is irradiated to the object.

Although not shown in FIG. 2, the prism 730 of the illumination unit 700 may be positioned between the turret-type lens 100 and the CMO lens 200 so that light may be irradiated onto an object.

Next, the color filter 800 is combined with the illumination unit 700 to help observe the object. That is, when the organs are observed under a microscope for medical diagnosis, a variety of color filters 800 are used to make prolonged veins, arteries or capillaries prominent.

The color filter 800 is positioned between the optical fiber of the illumination unit 700 and the prism to determine the color (wavelength) of light supplied to the object.

The color of the color filter 800 (the wavelength of the light passing through the filter) depends on the object of observation. Hereinafter, an example of observing the object using the color filter 800 will be described with reference to a photograph.

6A through 6C are photographs of veins observed using different types of color filters according to an embodiment of the present invention.

As shown in FIGS. 6A to 6C, when an object is observed with a microscope using a different type of color filter, the same object can be observed from different viewpoints.

7A and 7B are photographs showing tumor cells using a white color filter and a blue color filter according to an embodiment of the present invention.

7A and 7B are photographs of the same subject. When a white light is irradiated to a target using a white color filter as shown in FIG. 7A, it is difficult to know in which area the tumor occurred, When the blue light is irradiated using a filter, the tumor area appears to be dull.

As described above, the use of the color filter in the optical system of the present invention can cope with various diagnostic and surgical conditions. That is, various color filters (such as a green color filter, an orange color filter, a blue color filter, a yellow color filter, and an infrared color filter) can be used to diagnose lesions easily.

The microscope optical system described above is not limited in the configuration and the method of the embodiments described above, but the embodiments may be configured such that all or some of the embodiments are selectively combined so that various modifications can be made It is possible.

The present invention adopting the above-described configuration can provide the user with a microscope whose both optical axes are parallel.

delete

100: Turret lens
200: CMO lens
300: eyepiece
400: head portion prism
500: CCTV Lens
600: Beam splitter
700:
800: Color filter

Claims

An optical system of a microscope for forming an enlarged image of an object to be observed,
A CMO lens having one side facing the object to be observed;
A pair of turret type lenses whose one side faces the other side of the CMO lens and whose magnification is changed by a turret; And
And an eyepiece lens having one side facing the other side of the pair of turret type lenses,
Each of the light beams passing through the pair of eyepiece lenses passes through each of the pair of turret type lenses, the light rays passing through the pair of turret type lenses are focused by the CMO lens,
Wherein the optical axes of the pair of turret type lenses are parallel to each other,
Wherein magnifications of the pair of turret type lenses are the same,
Wherein each of the pair of turret type lenses includes:
Wherein a curvature of at least one of the sub-lenses of the plurality of sub-lenses is different from that of the sub-lens,
The turret comprises:
Wherein a magnification of the pair of turret type lenses is changed by rotating a line perpendicular to an optical axis of the pair of turret type lenses on an axis to invert the lower lenses having different curvatures on both sides, .

delete

The method according to claim 1,
A pair of turret type lenses and a pair of eyepiece lenses,
And a head portion prism for reflecting the light beam so that each of the light beams passing through the pair of eyepiece lenses passes through each of the pair of turret type lenses.

The method according to claim 1,
A pair of CCTV lenses receiving light beams passing through the pair of turret type lenses; And
A pair of turret type lenses and a pair of eyepiece lenses to reflect a part of the light rays passing through the pair of turret type lenses and to send the pair of CCTV lenses to the pair of turret type lenses, And a beam splitter for transmitting a part of the light beams passing through the lens to the pair of eyepiece lenses.

The method according to claim 1,
A light source for generating light, an optical fiber for transmitting the generated light, and a prism for reflecting the light transmitted from the optical fiber and supplying the light to the other side of the CMO lens,
Wherein the prism is located between the CMO lens and the pair of turret type lenses.

6. The method of claim 5,
Wherein the illumination unit further comprises a color filter disposed between the optical fiber and the prism and passing light having a wavelength within a predetermined range.

The method according to claim 6,
Wherein the color filter includes a green color filter, an orange color filter, a blue color filter, a yellow color filter, and an infrared color filter.