JPH06250101A - Optical observation device - Google Patents

Abstract

PURPOSE:To provide an optical observation device which eliminates the concern of near-sightness and is used without adversely affecting one's eyesight. CONSTITUTION:The device is provided with an illuminating means 4 which illuminates an observation object 3 and an optical system 1 which enlarges or reduces the image of the object for observation. The system has an object position adjustment means which makes position adjustment for farsighted to near-sighted side region. The device is also provided with a power supply switch 6 which performs on-off operations of the means 4. The on-off operation of the switch is linked with the object position adjustment means and the off operation of the switch is accomplished at the far-sighted side position of the observation optical system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical observation apparatus capable of reducing the risk of myopic vision of an observer (user) even when used for a long time.

[0002]

2. Description of the Related Art Many things such as a microscope and a telescope have been put into practical use for magnifying observation using a magnifying glass or the like. These devices have a focusing device (focus adjusting device) for focusing on an object, and an observer operates this focusing device while looking through the eyepiece lens side, Focusing, that is, focusing, is performed so that the image can be clearly observed. In particular, since each observer usually has different visual acuity, it is necessary to perform the focusing operation before the observation.

When performing this focusing operation, it is up to each observer which side of the far-sighted side and the near-sighted side to focus. In addition, looking at the general tendency, when focusing, in most cases, there are many cases where the person is observing slightly closer to the myopic side (image distance is 1 m or less) than the correct in-focus position of the person. There are few cases of observing with focusing at a position slightly deviated to the infinity side from the correct focusing position.

When the observation time is relatively short, such as a microscope or a telescope, even if the observation is continued with the focus state of the optical system being shifted to the myopia side, there is little adverse effect on the eyes. If observation is continued for a long time, it will promote myopia, which is not good for health.

It is expected that there will be many concerns in the future that the optical system will be looked into for a long period of time in a state of being closer to the near vision side from the correct focus position. For example, in recent years, the screen and the optical system for observation are mounted in a goggle-like housing, and the lens of the optical system is used to adjust the focus. The development of a spectacle-type television device that allows the user to observe the screen on the screen, and the "virtual reality" that has been attracting attention in recent years, that is, the so-called "virtual reality", which is a simulated experience technology in a virtual space by a computer.
This is because the spread of heads, mountings, display devices, etc. used for

[0006] Such an apparatus for observing a screen at an extremely short distance through an optical system is often worn continuously for a long period of time in consideration of its application and usage form. Therefore, if the optical system is used without being focused precisely, it may have a great impact on the eye health such as myopia.

As described above, the focusing operation is often performed in a state of being shifted to the near vision side. For an observer whose focus adjustment function has not deteriorated, the eyes focus on the subject in response to the situation, so the image can be clearly seen even if the focus is shifted to the myopia side quite deeply. Therefore, if this state is maintained for a long time, the probability of becoming myopic becomes extremely large.

On the other hand, even in the youth, when the focusing operation shifts to the farsighted side, the image itself becomes blurred. To keep observing can hardly occur in reality. Even if it is observed for a long time in such a state, it hardly happens that it becomes hyperopic.

Therefore, the above head mounting
An image display device such as a display device or an eyeglass-type television receiving device that uses the eyes at a close range does not shift too much to the myopia side when used for a long time and must be used while focusing on myopia. It can be said that there is a concern that it will become a cause.

[0010]

As described above, the head-mounting display device for virtual reality, the television receiver of the eyeglass type, etc. are often worn continuously for a long period of time for viewing. Therefore, if the loupe device for forming an image of the object to be observed by enlarging or reducing it on the observer's eye is used without being strictly adjusted according to one's own visual acuity, the eye health may be seriously affected. is there.

In particular, in the case of a focus position deviated to the near vision side, an observer such as a younger person who has an active focus adjustment ability of the eyes often focuses on the eyes, and this state If is maintained for a long time, the probability of becoming a myopic eye becomes very large.

Since it is necessary to wait for the observer's sense to determine whether or not the subject is properly focused, it is not known whether or not it is correct even after the focus adjustment, and there is a great risk of shifting to the near vision side. Therefore, there is a possibility that it may cause an increase in myopia in the younger generation, and when this kind of device is commercialized, it causes a socially problematic factor.

[0013] This kind of product, without disturbing the surroundings,
Individuals have the advantage of being freely available and enjoyable at any time, but once the above concerns are dispelled, their status as a product cannot be established.

Therefore, the object of the present invention is to
An object of the present invention is to provide an optical observation device having a structure that makes it difficult for the focusing device to focus on the myopia side, eliminates the worry of myopia eyes, and can be used without impairing the health of the eyes.

[0015]

In order to achieve the above object, the present invention is configured as follows. That is, it has an illuminating means for illuminating the observation object, and has an optical system for enlarging or reducing the observation object to allow an observer to observe the observation object, and the optical system has a position adjusting means for the observation. In the observation device configured to adjust the observation position in the range from the farsighted side to the nearsighted side with respect to the object, a power switch for performing an on / off operation of the illumination means is provided, and the on / off operation of the power switch is performed by the position adjustment means. The structure is interlocked, and the power switch can be turned off at a position on the far vision side of the observation optical system.

[0016]

In such a structure, the optical system has the observation position adjusting means, and the observation position is adjusted in the range from the farsighted side to the nearsighted side with respect to the observation object observed by the user via the optical system. It is adjustable. When observing the observation object, it is necessary to turn on the illumination means to make the observation object brighter. However, the on / off of the power switch for performing the on / off operation of the illumination means is interlocked with the observation position adjusting means. Has become. The power switch can be turned off at a position on the far vision side of the optical system. Therefore, when the switch is off, the optical system is located on the far vision side. Therefore, in order to observe, it is necessary to turn on the power switch, but this is done by moving the optical system from the farsighted side to the nearsighted side.

With the operation, the switch is turned on,
The illumination means is turned on to illuminate the observation object, and the image of the illuminated observation object is formed on the eyes of the observer via the optical system. However, at the initial stage of adjustment, the optical system has the in-focus position on the farsighted side with respect to the observer's eye, and the image looks blurred to the observer. Therefore, the observer operates the observation position adjusting means to move and adjust the optical system to the myopia side, but in the course of the adjustment, the image becomes clear and is in focus. Therefore, if the observer finishes the adjustment when the subject is in focus and shifts to the observation, the observer can observe the in-focus position without moving to the myopia side more than necessary.

Further, when the use is stopped at the stage when the observation is finished, the illumination means is switched off, but the observation position adjusting means must be operated to the farsighted side to move the optical system away from the observation object. When the observing position adjusting means is operated to the farsighted side to move the optical system away from the object to be observed, the switch interlocking with the observing position adjusting means is turned off and the illuminating means disappears.

As described above, the power switch of the light source for illuminating the observation object is turned off in conjunction with the backward operation of the optical system (lens) toward the farsighted side. Since the power switch of the light source is switched on in conjunction with the lens advancing operation to the nearsighted side, it is necessary to move it from the farsighted side to the nearsighted side for focusing. In a state in which the side is out of focus, the eyes gradually come into focus, and then the eyes of the observer are brought into focus.

In this way, it becomes possible to avoid the state of focusing too much on the myopia side, and there is a great concern that the viewer may unintentionally watch while moving to the myopia side excessively and bring about myopia. Can be reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The present embodiment will be described in detail by taking an optical system of a display device of virtual reality as an example. (First Embodiment) FIG. 1 is a schematic view showing the principle of an embodiment of the present invention, FIG. 2 is a view for explaining an adjusting operation of an optical system, and FIG. 3 is a holding and adjusting mechanism of the optical system. FIG.

In the figure, reference numeral 1 denotes a loupe lens which constitutes a loupe system and is held in a lens barrel 2. Also, 3
Is a display device such as an LCD (liquid crystal) for displaying images and the like, 4 is a light source which is a backlight for illumination of the display device 3, 5 is a power source of the light source, and 6 is a light source 4 of the power source 5. It is a switch for opening and closing the energizing circuit.

Reference numeral 7 denotes an operation mechanism for moving the lens barrel 2 forward and backward with respect to the screen of the display device 3, which constitutes a focusing device. The operation mechanism 7 that constitutes the focusing device includes, for example, an operation knob 7a, a screw 7b, and a moving body 7c,
The screw 7b is rotated by rotating the operation knob 7a, and the moving body 7c screwed to the screw 7b is moved forward and backward. This is an example, and the lens barrel 2 is displayed. Any structure may be used as long as the screen of the device 3 can be moved back and forth.

The lens 1 in the loupe system plays a role of an eyepiece lens for allowing the image of the screen of the display device 3 to be observed, for example, in a magnified manner with respect to the observer's eye. When viewed, the direction A in which the loupe lens 1 moves away from the screen of the display device 3 is the farsighted side, and the direction B in which it approaches is the nearsighted side.

The lens barrel 2 and the moving body 7c are connected by an appropriate connecting structure, and the lens barrel 2 is moved as the moving body 7c moves.
Can move forward and backward with respect to the screen of the display device 3.
Further, the moving body 7c is connected to the switch 6 via the compression spring 8.
Is also connected to the operation piece 6a of the switch 6, and the operation piece 6a of the switch 6 is compressed so as to be separated from the contact of the switch while the magnifying lens 1 is sufficiently moved to the farsighted side with respect to the screen of the display device 3. The length of the spring 8, the position of the operation piece 6a of the switch 6, the moving body 7c with respect to the screw 7b
The position etc. are set.

As shown in FIG. 3, the present apparatus has a pair of left and right loupe lenses 1 according to the eyes of an observer, and the pair of left and right loupe lenses 1 are respectively housed in a lens barrel 2. The lens barrels 2 are housed in the lens barrels 10, respectively, and can be moved back and forth to the screen of the display device 3 by being guided in the lens barrels 10. An interpupillary adjustment mechanism 11 is provided so that the distance between the pair of lens barrels 10 can be adjusted according to the interpupillary distance of the observer.

The interpupillary adjustment mechanism 11 is, for example, a knob 11a.
A screw 11b rotated by the knob 11a, a support piece 11c provided on one of the left and right lens barrels 10 and a moving piece 11d provided on the other of the left and right lens barrels 10. The support piece 11c rotatably holds the end of the screw 11b, and the moving piece 11d is screwed in the middle of the screw 11b and moves in accordance with the rotation of the screw 11b to move the position of the lens barrel 10 in the contacting / separating direction. It can be moved in parallel.

In FIG. 3, 7a is the above-mentioned operation knob, 7b is the above-mentioned screw, and 7c is the above-mentioned moving body.
By the movement of the moving body 7c, the lens barrel moving operation pieces 2b and 2c move the lens barrels 2 in the pair of lens barrels 10 by the respective movement amounts.

In such a configuration, when the image of the screen of the display device 3 is formed on the observer by the loupe lens 1 when the observer has a normal eye, the focus position of the loupe lens 1 is the display device 3. When it is adjusted in the direction away from (leftward in FIGS. 1 and 2), it becomes the farsighted side, and when adjusted in the direction toward the display device 3 (rightward in FIGS. 1 and 2), it becomes the nearsighted side.

In the present apparatus, when the power is off, the focus position of the loupe lens 1 is in the direction of the farsighted eye with respect to the healthy eye, and in order to turn on the power, the operation knob 7a is operated in the direction of the nearsighted eye. Must. That is, when the magnifying lens 1 is sufficiently on the far vision side A, the operation piece 6 of the switch 6
a is separated from the contact of the switch 6. In order to turn on the switch 6, the operation piece 6a must be brought into contact with the contact of the switch 6, and for that purpose the moving body 7c connected via the spring 8 must be moved in the contact direction of the contact. I won't.

To do this, operate the operating knob 7a to move the screw 7
Rotate b. In order to move the moving body 7c in the contact direction with respect to the contact, the screw 7b may be rotated in the forward direction, for example, and the operation knob 7a is rotated in order to operate the screw 7b in the forward direction. . As a result, the moving body 7c is moved in the contacting direction of the contacts of the switch 6, and the loupe lens 1 is moved in the screen direction of the display 3.

As the moving body 7c moves, the operation piece 6a of the switch 6 is pushed via the spring 8, so that the contact of the switch 6 is turned on soon, the power source 5 is connected to the light source 4, and the light source 4 is turned on. As a result, the light source 4 becomes the display 3
Illuminate from the back to brighten the screen.

An image of the brightly illuminated display 3 is formed on the observer's eye through the magnifying lens 1. Since the image is blurred for the observer when the magnifying lens 1 is on the far vision side, the operator further operates the operation knob 7a,
The movable body 7c is moved by rotating the screw 7b, and the loupe lens 1 is moved to the near vision side. With the further movement of the moving body 7c, the operating piece 6a of the switch 6 is also pressed. However, since the operating piece 6a is connected to the moving body 7c via the spring 8, after the operating piece 6a comes into contact with the contacts. Is spring 8
Absorbs the moving amount of the moving body 7c so that an excessive operating force is not applied to the operating piece 6a.

By operating the operation knob 7a, the loupe lens 1 is brought closer to the display 3, but the focus state of the observer is changed accordingly, and the image becomes visible clearly in due course. Then, if the adjustment is finished in this state and the process of viewing the image on the display device 3 is started, it is possible to view the image in the optimum state without being overfocused on the myopia side.

When the viewing is finished, it is necessary to turn off the lighting. For that purpose, the switch 6 needs to be turned off, but at this time, the operation knob 7a is reversely rotated. The moving body 7c retracts by the reverse rotation operation of the operation knob 7a, and the magnifying lens 1 also retracts to the farsighted side. When the loupe lens 1 is sufficiently retracted to the farsighted side, the spring 8 between the moving body 7c and the operating piece 6a is released from compression and fully extended, and when the moving body 7c continues to retreat, the operating piece 6a is eventually released. Moves away from the contact of switch 6. As a result, the circuit between the power source 5 and the light source 4 is cut off and the power is turned off.

As described above, in the present apparatus, the power switch of the light source for illuminating the display is turned off in conjunction with the backward operation of the loupe lens to the far vision side. Since the power switch on operation is configured to be performed in conjunction with the lens advancing operation to the nearsighted side, when using it, it always moves from the farsighted side to the nearsighted side for focusing, so on the farsighted side In the defocused state, the observer's eyes are brought into focus through a situation in which the image gradually comes into focus.

In this way, if the operation of the focusing device is stopped while the subject is in focus, it is possible to avoid the situation where the subject is overfocused due to too much myopia. This greatly reduces the concern that the viewer will see myopia and bring about myopia. (Other embodiments)

The opening / closing operation mechanism of the switch 6 may be constructed as shown in FIG. That is, the engagement piece 6b is attached to the operation piece 6a of the switch. This engaging piece 6b has a hook-shaped engaging portion 6c which engages with the moving body 7c at the tip, and this engaging piece 6b uses a tension spring 8a to move the operating piece 6a of the switch to the contact point of the switch 6. It is always biased in the closing direction.

Therefore, when the moving body 7c moves to the far vision side A, the engaging portion 6c collides with the moving body 7c, and as the moving body 7c further moves in the far vision side A direction, the engaging piece 6b.
Is moved to the hyperopic side A against the tension spring 8a, and the contact of the switch 6 is opened.

On the other hand, when the moving body 7c is moved in the B direction on the near vision side, the engaging portion 6c is in contact with the moving body 7c, and the engaging piece 6b which obtains the biasing force to the switch 6 side by the tension spring 8a. The moving piece 7c moves to the switch 6 side with the movement of the moving body 7c in the direction B of the near vision side, and eventually moves the operation piece 6a of the switch to the position of the contact closed state of the switch 6.
As a result, the contact of the switch 6 can be closed.

As a result, when observing and using the built-in display device, the illumination is turned on when the focusing device is adjusted to adjust the position of the magnifying lens from the farsighted side to the nearsighted side, and the illumination is turned on. Observe and use in the completed state, and after finishing the observation and use, move the magnifying lens to the farsighted side with the focusing device to turn off the switch by opening the operation piece of the switch against the spring and turning on the power supply. Can be cut.

Next time the device is used, if the focusing device is operated to move the loupe system from the farsighted side to the nearsighted side, the operation piece 6a of the switch 6 is pulled by the biasing force of the spring 8a. It is turned on, turned on and ready for observation.

At this time, since the loupe lens 1 is in the farsighted state, the observer operates the focusing device to move the loupe lens 1 in the myopic direction in order to focus the observation eye on the display device 3.

In this way, focusing is always performed from the far vision direction. Therefore, even if the focus position is moved back and forth near the focusing position, focusing is not performed in an excessive myopia state. Therefore, even if observation is performed at that position for a long time, it is possible to avoid myopia.

In this embodiment, the power switch is operated when the loupe system is moved, but the same effect can be obtained by fixing the loupe system and moving the display side to operate the power switch. It goes without saying that you can obtain

FIG. 5 shows a schematic view of the head mounted display. In the figure, 1 is a loupe lens,
An eyepiece lens, 20 is a goggle type casing, 11a is a knob of an interpupillary adjustment mechanism, 21 is a face pad,
Reference numeral 22 denotes a band of the housing 20, and an observer fixes the goggle-shaped housing 20 to the face with the band 22 and observes it with the magnifying lens 1.

The distance between the left and right loupe lenses 1 is adjusted by rotating the knob 11a of the interpupillary distance adjusting mechanism so as to match the distance between the eyes of the observer for easy viewing. The display device is housed in the housing 20, and the screen is observed by looking through the loupe lens 1.

In the apparatus of this figure, diopter adjustment is performed by operating the lever 30 provided on the loupe lens frame. The same effect can be obtained even if the power switch is operated at the far-sighted position of the lever 30.

Further, it may be easily considered that the loupe lens 1 is moved electrically, but in this case, after the observation is completed and the switch is turned off, the loupe lens is moved to the farsighted side. , It must be configured to turn off the power. This can also be easily realized by a known technique.

With this configuration, when the power is turned on, the focusing operation is always started from the farsighted side, so that it is possible to avoid excessive adjustment to the nearsighted side, so that it is possible to prevent myopia. .

Further, when the power switch is turned off while the loupe is on the nearsighted side, an alarm sound or blinking of light may be emitted to prompt movement of the loupe to the farsighted side.

Although various examples of the present invention have been described above, the present invention adjusts the observation optical system from the farsighted side to the nearsighted side when the observation is focused in order to prevent myopia from occurring. The optical system is configured to do so. Further, the present invention is characterized in that when the power switch of the display device is operated, it cannot be turned off unless the focusing device of the optical system is always adjusted to the farsighted side. By setting the farsighted position sufficiently beyond the position that covers many farsighted eyes, even a farsighted person can obtain the focus position when the power is turned on. Therefore, people with hyperopia will be able to observe enough.

With the above configuration, when the power is turned on during observation and use, the focusing operation always shifts from the farsighted side to the nearsighted side because the loupe system is located at the farsighted side. The image becomes clearer as it shifts from the blurred state to the near vision side. And
If the focusing operation is finished with the image clearly visible, there is no danger of further shifting the in-focus position in the myopia direction, and there is no risk of causing myopia.

The present invention is not limited to the above-described embodiment, but can be carried out by appropriately modifying it within the scope not changing the gist thereof. For example, a focusing device for a loupe is a helicoid-type feeding device or the like. However, it may be realized by using a known configuration such as Further, the present invention may be configured not only to turn on / off the lighting device but also to turn on / off the power of the display device itself, and the display device is not limited to the LCD display, and other flat panel packages, cathode ray tubes or the like may be used. Absent.

[0055]

As described above in detail, according to the present invention, by moving the observation optical system to the farsighted side, the power switch of the observation object illumination system can be operated. It becomes possible to always force the focus on the observation object from the farsighted side to the nearsighted side. Therefore, it is possible to prevent focusing at an excessive myopic position, and it is possible to effectively prevent the myopia from being caused by long-term observation on the myopic side.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention,
The structural diagram which shows the schematic structure of the principal part.

FIG. 2 is a diagram for explaining the positional relationship between an observer's eyes and a lens in the apparatus of the present invention in FIG.

FIG. 3 is a perspective view for explaining an example of a mechanism configuration in the device of the present invention in FIG.

FIG. 4 is a schematic diagram showing another configuration example of a switch operating mechanism.

5 is a perspective view showing the external appearance of the device of the present invention in FIG. 1. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Loupe lens 2 ... Lens barrel 3 ... LCD (liquid crystal) display device 4 ... LCD (liquid crystal) display light source 5 ... Power source 6 ... Switch 6a ... Operation piece 7 ... Operation mechanism (focusing device) 7a ... Operation knob 7b, 11b ... screw 7c ... moving body 8 ... compression spring 10 ... lens barrel 11 ... interpupillary adjustment mechanism 11a ... knob 11c ... supporting piece 11d ... moving piece.

Claims (1)

[Claims] 1. An illumination means for illuminating an observation object,
In addition to having an optical system for enlarging or reducing this observation object to allow an observer to observe it, this optical system has a position adjusting means, with respect to the observation object, in the range from the farsighted side to the nearsighted side. In the observation device configured to adjust the observation position, a power switch for performing on / off operation of the illumination means is provided, and on / off of the power switch is configured to interlock with the position adjustment means. An optical observation device characterized in that it is made possible at a position on the far vision side of an optical system.