KR101764123B1

KR101764123B1 - Electronic magnifying glass

Info

Publication number: KR101764123B1
Application number: KR1020150128379A
Authority: KR
Inventors: 양승희
Original assignee: 주식회사 맥스덴탈
Priority date: 2015-09-10
Filing date: 2015-09-10
Publication date: 2017-08-02
Also published as: KR20170030891A

Abstract

The present invention relates to an electronic magnifying glass, and more particularly, to an electronic magnifying glass comprising: a casing having both ends opened and an input button formed on the outside; A prism rotatably installed at one end of the casing and configured to introduce an image of the subject into the casing; A liquid lens disposed at a rear end of the prism and having a refractive index changed and a focal distance with respect to the subject; A plurality of objective lenses for adjusting an image of the subject passed through the prism and the liquid lens to a size and magnifying the size of the subject; A beam splitter through which an image of a subject passing through the objective lens is transmitted, and a longitudinal wave is reflected; A color sensor for reading an RGB value of an image transmitted through the beam splitter; A reflecting mirror for focusing the image reflected by the beam splitter on the surface; A display lens provided at the other end of the casing for displaying an image formed on the reflection mirror; And a controller for comparing the RGB values read from the color sensor to adjust the refractive index of the liquid lens to match the focal length of the subject.

Description

[0001] ELECTRONIC MAGNIFYING GLASS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electronic magnifying glass, and more particularly, to an electronic magnifying glass capable of automatically enlarging a subject with a high resolution by automatically adjusting a focal distance.

Magnifying glass is widely used in various fields. For example, eyewear glasses may be used for people with poor eyesight in public offices of public institutions such as administrative agencies or banks, or magnifiers may be used to check the condition of a patient's teeth in a dentist.

An example of a magnifying glass is disclosed in " Portable magnifying glass ", Japanese Laid-Open Patent Publication No. 2004-0098922, and Korean Patent No. 10-0427082 entitled " Variable Focus, Variable Magnification Magnification and Automatic Parallax Correction Magnifying Glass ".

The disclosed portable magnifier is convenient to carry but has a limited focal length so that it is inconvenient to use it when observing a very small size object or a visual acuity. In addition, since the conventional portable magnifying glass is merely enlarged, there is a limit that the user can not see clearly when viewed with the naked eye.

In addition, although the variable focus, variable magnification, and automatic parallax-compensating magnifier can be varied in focus and can control the enlargement magnification, there is a disadvantage that it is difficult to know how to use the magnifier because of its complicated structure. Further, there is a restriction that it is inconvenient to carry.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic magnifying glass capable of clearly viewing a subject by adjusting a focal distance with a simple structure.

Another object of the present invention is to provide an electronic magnifying glass capable of confirming an image of a subject at various positions because the eyepiece distance for confirming the image of the subject is not fixed.

Another object of the present invention is to provide an electronic magnifier capable of analyzing color information of a tooth and displaying matching color information when used in a dentistry.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by an electronic magnifier. An electronic magnifier according to the present invention includes: a casing having both ends open and an input button formed on the outside; A prism rotatably installed at one end of the casing and configured to introduce an image of the subject into the casing; A liquid lens disposed at a rear end of the prism and having a refractive index changed and a focal distance with respect to the subject; A plurality of objective lenses for adjusting an image of the subject passed through the prism and the liquid lens to a size and magnifying the size of the subject; A beam splitter through which an image of a subject passing through the objective lens is transmitted, and a longitudinal wave is reflected; A color sensor for reading an RGB value of an image transmitted through the beam splitter; A reflecting mirror for focusing the image reflected by the beam splitter on the surface; A display lens provided at the other end of the casing for displaying an image formed on the reflection mirror; And a controller for comparing the RGB values read from the color sensor to adjust the refractive index of the liquid lens to match the focal length of the subject.

According to an embodiment of the present invention, the color sensor reads RGB values of various phases of an object obtained while the refractive index of the liquid lens is changed, and transmits the read RGB values to the controller, and the controller compares various RGB values transmitted from the color sensor The refractive index corresponding to the highest RGB value is selected and fixed to the voltage corresponding to the selected refractive index and applied to the liquid lens.

According to an embodiment, the control unit may further include a storage unit for storing various color information of the teeth, and the control unit may compare the color of the teeth introduced via the color sensor with the plurality of color information through the liquid lens So that color information to be matched can be selected.

According to an embodiment of the present invention, the apparatus may further include a display unit provided outside the casing for displaying color information of a tooth selected through the controller.

According to an embodiment of the present invention, there is further provided a mirror driving unit for continuously driving the reflection mirror when power is supplied from the control unit, wherein the reflection mirror is subjected to a corrosion treatment to form fine protrusions on the surface.

The electronic magnifying glass according to the present invention can obtain a clear resolution image by automatically adjusting a focal distance of a subject using a liquid lens. In addition, the size of the subject can be greatly increased by a combination of a plurality of objective lenses.

Further, by eroding the surface of the reflecting mirror and rotating the reflecting mirror, the viewing angle can be increased and the image of the subject can be confirmed clearly even if the eyepiece distance is short.

Further, since the color information of the teeth is retrieved and displayed, the task in the dentistry can be shortened.

1 is a cross-sectional view showing a sectional configuration of an electronic magnifying glass according to the present invention,
2 is an enlarged side view of a reflection mirror of an electronic magnifying glass according to the present invention,
3 is an exemplary view showing a state in which a patient's teeth are observed using an electronic magnifying glass according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 1 is a cross-sectional view showing a sectional configuration of an electronic magnifying glass 100 according to the present invention, and FIG. 3 is an exemplary view showing a state in which teeth are observed with an electronic magnifying glass 100.

The electronic magnifier 100 according to the present invention is used by supplying power. The electronic magnifying glass 100 of the present invention can be used in various fields such as observation of a tooth, reading of an official document, and observation of a foreign part during an internal and external surgery.

1, an electronic magnifying glass 100 according to the present invention includes a casing 110 having both ends opened and a body 110 coupled to one end of the casing 110 to allow viewing of a subject A not positioned at the front A liquid lens 130 disposed adjacent to the prism 120 to realize various focal lengths and a liquid lens 130 disposed on the front and rear sides of the liquid lens 130 and configured to form an image of a subject which has passed through the prism 120, A beam splitter 150 for dividing the image transmitted through the objective lens unit 140 into a transverse wave and a longitudinal wave and a beam splitter 150 for splitting the image transmitted through the objective lens unit 140 A reflection mirror 170 for imaging an image reflected by the beam splitter 150 and an image formed on the reflection mirror 170 by a user A display lens 180 for displaying the image to be visually confirmed, , And based on the comparison result and a controller 190 to control the focal length of the liquid lens 130.

The casing 110 is formed in a cylindrical shape having a predetermined length. Both ends of the casing 110 are opened. A prism coupling hole 111 to which the prism 120 is coupled is provided at one opened end of the casing 110 and a display lens coupling hole 113 to which the display lens 180 is coupled is provided at the open end of the casing 110 .

On the outer circumferential surface of the casing 110, various input buttons 115 for receiving an input signal from a user and a display window 117 for displaying display information are provided. The input button 115 may include a power on / off button, a tooth color information search button when the electronic magnifying glass 100 is used on a tooth, a button for using the LED 121, and an auto focus drive button. On the display window 117, power supply information and color information of teeth can be displayed. The display window 117 may be provided with an OLED.

The prism 120 is provided in the prism coupling hole 111 of the casing 110 to guide the image of the object A not positioned on the front surface to the objective lens unit 140. The prism 120 reflects an image of the subject A which is not located on the front surface and guides it to the objective lens unit 140. [ The prism 120 differs in the range in which the image of the subject A is introduced depending on the angle.

The prism 120 is freely rotatably coupled to the prism coupling hole 111 at an angle of 270 ° so that the electronic magnifying glass 100 can be used without any direction. The user rotates the prism 120 by hand while viewing through the display lens 180 to adjust the shape of the desired subject A to be displayed.

On the back surface of the prism 120, an LED 121 is provided. The LED 121 is used when it is necessary to view the object A at night or in a dark condition.

The refractive index of the liquid lens 130 varies according to the applied voltage and various focal lengths can be realized. When the power is applied, the liquid lens 130 changes its refractive index to various refractive indices when various voltages from a low voltage to a high voltage are applied within a range allowed by the liquid lens 130. [ Then, the image of the object A obtained for each of various refractive indexes and corresponding focal lengths is output to the color sensor 160. [

The liquid lens 130 is fixed at the refractive index and the focal distance and the subject A is fixed with a voltage that realizes the sharpest resolution with respect to the subject A under the control of the color sensor 160 and the controller 190. [ You get an award for.

Here, the liquid lens 130 may be replaced with a VCM LENS as the case may be.

The objective lens unit 140 is disposed on the front and rear of the liquid lens 130 so as to adjust the image of the subject applied from the prism 120 to a size and control the magnification. In addition, the objective lens unit 140 corrects aberrations such as chromatic aberration, spherical aberration, and coma aberration. In the objective lens unit 140, a plurality of convex lenses made of crown glass and a concave lens made of flint glass are arranged.

1, the objective lens unit 140 according to an embodiment of the present invention includes a first objective lens group 141, a second objective lens group 143, and a third objective lens group 143 on the rear surface of the liquid lens 130, And the third objective lens group 145 are sequentially arranged. However, this is an embodiment, and the first objective lens group 141 may be disposed between the prism 120 and the liquid lens 130 as occasion demands.

The arrangement and number of the convex lens and the concave lens forming each objective lens group 141, 143, and 145 can be adjusted differently according to the purpose of use and magnification.

The first objective lens group 141 has a basic lens configuration, and relieves chromatic aberration and curvature of the image. The second objective lens group 143 magnifies the size of the image obtained by the display lens 180. The enlargement magnification may be different according to the shape and the number of the lenses constituting the second objective lens group 143. [ The third objective lens group 145 corrects the inverted image A 'by the first objective lens group 141 and the second objective lens group 143 and adjusts the image A'. In addition, the third objective lens group 145 alleviates the chromatic aberration and the curvature phenomenon like the first objective lens group 141.

The beam splitter 150 divides an image obtained via a plurality of objective lenses 141, 143, and 145 into a transverse wave and a longitudinal wave, and outputs the image to a color sensor and a reflection mirror 170. The longitudinal waves forming the image of the subject are transmitted through the beam splitter 150 and output to the color sensor 160. Then, the transverse waves forming the image of the subject are reflected by the surface of the beam splitter 150 and output to the reflection mirror 170.

The color sensor 160 reads the RGB values of the liquid lens 130 while varying the refractive index of the liquid lens 130, and transmits the read RGB values to the controller 190. The liquid lens 130 varies refractive indexes at various voltage values and outputs an image of the subject to the color sensor 160 for each refractive index.

The color sensor 160 reads the RGB numerical values of the image of the subject A obtained at each refractive index and transmits the RGB numerical values to the controller 190. An image forming lens 161 is provided in front of the color sensor 160 to form a longitudinal wave transmitted through the beam splitter 150 onto the color sensor 160.

The reflection mirror 170 forms an image reflected on the beam splitter 150 on the display lens 180 so that the user can visually confirm the image through the display lens 180. The reflection mirror 170 is formed concave like a satellite antenna. 2 is an enlarged view of the surface of the reflection mirror 170. As shown in FIG. As shown in FIG. 2, the reflective mirror 170 is subjected to a surface treatment to form fine protrusions 170a on the surface thereof.

The image A is reflected on the fine protrusion 170a formed on the surface of the reflective mirror 170 and the image is irregularly bent as compared with the smooth mirror having no fine protrusions and the scattering rate is increased and scattering of the image on the reflection mirror 170 The user increases the viewing angle when observing the image through the display lens 180, thereby eliminating the eyepiece distance (L in FIG. 3) in which the user observes the image through the display lens 180.

At this time, a mirror driving motor 171 for rotating the reflection mirror 170 is provided behind the reflection mirror 170. The mirror driving motor 171 is rotated by receiving power when the auto focus driving button is applied. As the mirror driving motor 171 is driven, the reflecting mirror 170 continuously rotates and images the image applied from the beam splitter 150 clearly.

That is, as shown in FIG. 3, it is possible to confirm a clear resolution image even when the user is spaced apart by a certain distance without touching the eye E with the display lens 180.

The rotation of the reflection mirror 170 may be changed depending on a power supply mode. When the battery is supplied with power, the rotation stops after a certain period of time after pressing the auto focus driving button to prevent the battery from being consumed quickly.

The reflective mirror 170 may be replaced by a mirror coating on the micro lens film, depending on the situation. The microlens film is a regularly arranged very small micrometer lens on the surface of a thin film or sheet.

The display lens 180 is coupled to the display lens coupling hole 113 of the casing 110 so that the user can confirm the image formed on the reflection mirror 170. [ At this time, the display lens 180 can magnify the image so that the user can check the image more easily.

The control unit 190 applies a wide range of voltages to the liquid lens 130 when the auto focus driving button is operated and adjusts the focal distance of the subject A based on the RGB numerical values read from the color sensor 160 The refractive index of the liquid lens 130 is fixed.

The control unit 190 compares the various RGB values transmitted from the color sensor 160 and selects the RGB value indicating the highest value among the RGB numerical values. The image of the RGB value selected in this way is the one that most clearly shows the subject A, that is, the image having the highest resolution.

The control unit 190 fixes and applies the voltage corresponding to the refractive index of the selected RGB value to the liquid lens 130. [

The controller 190 selects the RGB value indicating the highest value and applies a voltage value corresponding to the refractive index indicating the RGB value to the liquid lens 130. [ Thereby, the refractive power of the liquid lens 130 is fixed, and the subject A can be seen with the clearest resolution.

Here, the voltage value or the refractive index fixed to the liquid lens 130 is invalidated by the automatic focus drive button re-operation. That is, when observation of a specific subject is completed and the user attempts to observe another subject, the user operates the auto-focus driving button again to newly adjust the refractive index of the liquid lens 130 with respect to the new subject.

Meanwhile, when the electronic magnifying glass 100 of the present invention is used for observing teeth in a dentistry, the color sensor 160 and the controller 190 can search and display the color information of a tooth. The color of a person's teeth varies from person to person. If an artificial tooth is applied to a tooth for tooth decay, the same artificial tooth as the existing tooth should be applied. In this case, the artificial tooth having the same color information can be selected by knowing the color information about the color of the existing tooth.

In the electronic magnifying glass 100 of the present invention, color information of various teeth is stored in the storage unit 165. When the image of the teeth is input to the color sensor 160, the controller 190 compares the various color information stored in the storage unit 165 with the color information read from the color sensor 160 to search for a match. Then, the controller 190 selects the color information of the teeth to be matched.

The control unit 190 displays the color information of the selected tooth on the display window 117 so that the operator can recognize the color information of the patient's teeth. By this process, the operator can omit the process of searching for the color information of the tooth by the visual inspection of the job, and the dental procedure time can be shortened.

Here, the electronic magnifying glass 100 according to the present invention may be connected by a wire to receive power, or a battery (not shown) may be installed inside the casing 110 to supply power.

The use of the electronic magnifier 100 according to the present invention having such a configuration will be described with reference to Figs. 1 to 3. Fig.

Here, for convenience of explanation, the electronic magnifying glass 100 of the present invention is described as observing the teeth T as shown in Fig. However, this is merely an example, and the electronic magnifier 100 of the present invention can be used for observation of various objects.

As shown in FIG. 3, the user can use the electronic magnifying glass 100 to observe the state of the patient's teeth T and color information. The prism coupling hole 111 of the casing 110 is disposed so as to face the mouth of the patient, and an autofocus drive button is applied.

The prism 120 acquires an image of the subject A. At this time, the user rotates the prism 120 to the prism coupling hole 111 to adjust the shape of the desired subject A to be visible on the display lens 180. The liquid lens 130 is varied in a variety of voltages in a set range by default, is changed to a refractive index corresponding to each voltage, and an image for the tooth T is obtained from the prism 120. The image obtained from the liquid lens 130 enters the beam splitter 150 through the first objective lens group 141, the second objective lens group 143 and the third objective lens group 145.

At this time, the inverted image A 'passing through the first objective lens group 141 and the second objective lens group 143 is converted into the regular image A via the third objective lens group 145 .

The longitudinal wave is transmitted through the beam splitter 150 and is introduced into the color sensor 160 via the imaging lens 161. The color sensor 160 reads the RGB values of various images of the subject obtained at various refractive indexes and transmits the read RGB values to the controller 190. The controller 190 selects the highest RGB value among the RGB values transmitted from the color sensor 160 and selects the refractive index and the voltage value corresponding thereto.

The controller 190 controls the voltage value corresponding to the highest RGB value to be applied to the liquid lens 130 at a fixed value. As a result, the refractive index of the liquid lens 130 is fixed, and the image having the highest resolution with respect to the object is obtained.

On the other hand, the image having the highest resolution is reflected by the beam splitter 150 and is received by the reflection mirror 170. The reflecting mirror 170 rotates by driving the mirror driving motor 171 to form an image on the display lens 180. At this time, the protrusion 170a on the surface of the reflection mirror 170 reflects the image irregularly, raises the scattering rate, eliminates the eyepiece distance, and increases the resolution and viewing angle.

The user views the image of the subject A imaged on the reflection mirror 170 through the display lens 180. [ At this time, the size of the image A to be confirmed through the display lens 180 is clearly displayed by 2 to 2.5 times larger than the actual object.

Accordingly, the user can clearly and largely confirm the subject in a narrow place which is not located at the front.

On the other hand, the controller 190 causes the display window 115 to display the color information of the selected tooth (T).

As described above, the electronic magnifying glass according to the present invention can automatically adjust the focal distance of a subject using a liquid lens, and can obtain a larger and clearer image than the actual size of the subject by combining a plurality of objective lenses.

By forming fine protrusions on the surface of the reflection mirror and rotating the reflection mirror, it is possible to increase the viewing angle and to visually confirm the image of the object even if the focal distance is short.

The embodiments of the electronic magnifying glass of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. There will be. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: electronic magnifier 110: casing
111: prism coupling hole 113: display lens coupling hole
115: input button 117: display window
120: prism 121: LED
130: liquid lens 140: objective lens part
141: first objective lens group 143: second objective lens group
145: third objective lens group 150: beam splitter
160: color sensor 161: image-forming lens
165: storage unit 170: reflection mirror
170a: Projection 171: Mirror drive motor
173: drive shaft 180: display lens
190:

Claims

A casing having both ends opened and an input button formed on the outside;
A prism rotatably installed at one end of the casing and configured to introduce an image of the subject into the casing;
A liquid lens disposed at a rear end of the prism and having a refractive index changed and a focal distance with respect to the subject;
A plurality of objective lenses for adjusting an image of the subject passed through the prism and the liquid lens to a size and magnifying the size of the subject;
A beam splitter through which an image of a subject passing through the objective lens is transmitted, and a longitudinal wave is reflected;
A color sensor for reading an RGB value of an image transmitted through the beam splitter;
A reflection mirror for forming an image reflected on the beam splitter on the surface thereof and having a microprojection formed on the surface thereof by corrosion;
A display lens provided at the other end of the casing for displaying an image formed on the reflection mirror;
A controller for comparing the RGB values read from the color sensor to adjust the refractive index of the liquid lens to match the focal length of the subject;
A mirror driver for continuously rotating the reflection mirror when power is applied from the controller;
And a display unit for displaying color information of the teeth.

The method according to claim 1,
Wherein the color sensor reads the RGB values of various images of the subject obtained while the refractive index of the liquid lens is changed and transmits the RGB values to the control unit,
Wherein the control unit compares various RGB values transmitted from the color sensor, selects a refractive index corresponding to the highest RGB value among the plurality of RGB values, and fixes the voltage to a voltage corresponding to the selected refractive index, Electronic magnifier.

3. The method of claim 2,
The control unit may further include a storage unit for storing various color information of teeth,
Wherein the control unit compares the color of the tooth introduced via the color sensor with the plurality of color information through the liquid lens to select the matching color information.

The method of claim 3,
Wherein the display unit is provided outside the casing and displays color information of the tooth selected through the control unit.

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