KR20020086521A - Optical beam-splitter unit and binocular display device containing such a unit - Google Patents

Abstract

The present invention relates to an optical beam splitter comprising transparent planar plates (6, 7) starting at a common intersection (4) of a light reflecting surface branched towards a light beam to be distributed. Another type of binocular image display device of the present invention includes an optical beam splitter and includes a first focusing element 24 and an alternative mirror 25. The apparatus uses its beam splitter as the optical beam splitter described above, wherein two opposing sides of the optical beam splitter are seen in the direction of the beam reaching the translucent reflecting surface of the optical beam splitter, ie in the receiving direction 5. Two first focusing elements are positioned at the first optical focusing element, and a common optical axis of the first focusing element 24 is perpendicular to the receiving direction 5, and is disposed on both outer sides of the first focusing element 24. An alternative mirror 25 is located, the reflecting surface of which forms an angle δ of 45 ° ± 15 ° with the optical axis, and the intersection of the plane of the reflecting surface of the alternative mirror 25 is the It is characterized in that it is parallel or perpendicular to the mirror-crossing intersection 4 of the translucent reflecting surface.

Description

Optical beam splitter and binocular display device having the same {OPTICAL BEAM-SPLITTER UNIT AND BINOCULAR DISPLAY DEVICE CONTAINING SUCH A UNIT}

The use of mirrors, prisms and translucent mirrors to distribute or combine light beams has long been known. For example, the invention of US Pat. No. 4,924,853 (Jones et al.) Is a device that combines two optical paths sequentially installed with two prisms having reflective surfaces that direct beams from different directions to the same optical path. . In addition, Hungarian patent 186 558 discloses a device for combining two optical paths, which in turn are provided with a mirror and a translucent reflecting mirror which direct two beams from different directions to the same optical path.

Published PCT patent WO 85/04961 proposes a solution using X cubic to distribute a beam from one direction into two different optical paths by crossing the reflecting plane. Since the weight of this device is relatively large, it is not suitable in certain cases such as, for example, a display device worn on the head.

It is well known that in everybody's life, it is required for the viewer to enlarge the viewing angle to the object source, from simple loupes to microscopes, laparoscopes and telescopes. There are many forms of technical means to do this. In monocular devices, the magnification of the viewing angle with respect to the object source can only be seen with one eye. However, seeing with only one eye is not natural. Seeing it for a long time at a glance can even be dizzy. In conclusion, there is a need for an apparatus that makes it possible to view an object source with both eyes. Therefore, there is a need for various types of binocular devices that are already known and used.

A common feature of known binocular devices is that they include a beam splitter that distributes the beam originating from an object source, such as a computer display device worn on the head, to two left and right eyes. The beam splitter is a reflective surface of a mirror or prism, which may be total reflection or translucent.

Basically, the beam can be distributed in two ways. In the first scheme, two opaque halves of the light path from the object source to the left eye region and from the object source to the right eye region are arranged in each subsequent order, for example in the form of a V, reflecting the beam in different directions. Proceeding toward the slope, the first sections of the two light paths form a predetermined angle. In a second scheme, the first section of the light path coincides so that the translucent plane distributor passes a portion of the beam and reflects the remaining beam in the other direction.

As a representative apparatus of the first system, Japanese Patent No. 06110013 (Tosaki et al.), Japanese Patent No. 07287185 (Akishi et al.), And U.S. Patent No. 5,682,173 (Horakov suzuki et al.) There is an invention. In this apparatus, the optical path is distributed using a mirror arranged in a V shape. A common drawback of this solution is that trapezoid distortion occurs because none or any of the mirrors are placed opposite the screen, one of which is slightly to the left and the other slightly to the right. Is that. If the screen is placed too close to the corner where the V mirror meets, from a certain point on the screen, the beam does not reach even to both mirrors. For this reason, a fairly large gap must be maintained between the screen and the V mirror. In practice, the spacing should be twice the diagonal of the screen. This results in an increase in the structural size of the device on the one hand and a large gap between the screen and the lens behind the V-shaped mirror. In addition, in order to conveniently view a distant virtual picture, the screen is spaced from the lens at the same interval as the focal length, thereby reducing the possible magnification of the picture, and the larger the focal length the lens is. Magnify to a small extent.

In the case of binocular devices, because they are symmetrical, the micro-display should be placed between the two eyes, and if the distance between the microdisplay and the V-mirror is large, the device will protrude like a beak and wear on the head In the case of, the pressure applied to the site covered by the nose or from the aesthetic point of view increases, which is not preferable. U. S. Patent No. 5,682, 173 solves this problem by placing two or more mirrors in the optical path between the screen and the V-shaped mirror. As a result, the optical path is twice as reflected at a 90 ° angle. In the case of Patent No. 07287185, for this same purpose, one single mirror is disposed in the light path between the screen and the V-shaped mirror.

A second method of distributing optical beams, wherein when a first section of the optical path coincides, a distributor having a translucent surface passes a portion of the beam and reflects the remaining beam in a different direction, the above-mentioned International Patent Application WO 85 It is handled in / 04961 (moss). This International Patent Application WO 85/04961 uses a well known optical element, X cubic prism, with an inner surface which is a semitransparent reflecting surface to separate the beam from the object source. In this device, in principle, the distance between the screen and the X cubic prism is reduced to zero. However, X cubic prisms are solid and therefore heavy. In addition, it is costly, complex and labor intensive to bond and manufacture the four right angle prisms, which form the X cubic prism.

The object of the present invention is to overcome the disadvantages of other currently known solutions devised to solve the same purpose, to have the smallest possible weight, and to be placed as close to the object source as practically desired, and to It is possible to reflect any point, and to provide an optical beam splitter whose light intensity distribution of the image projected through the apparatus is the same as that of the object source.

Furthermore, another object of the present invention is a binocular image display, manufactured using the optical beam splitter which eliminates the deficiencies of other currently known devices, as described above, which is compact and lightweight enough to be easily worn on the head. To provide a device.

The present invention relates to an optical beam splitter and a display device having the beam splitter.

Figure 1 shows the left reflected beam path of three translucent mirrors intersecting in the X shape.

Fig. 2 shows the right reflected beam path of three translucent mirrors intersecting with X-shape.

3 is a cross-sectional view of one example of a possible embodiment of the light beam splitter according to the present invention.

4 is a detailed view of another embodiment of the light beam splitter in cross section showing the left reflection beam path.

Figure 5 shows the angle and distance conditions necessary to define the band of light beams that emerge.

FIG. 6 is a perspective view showing another configuration example of the beam splitter according to the present invention, similar to the form shown in FIG.

7-8 are exploded perspective views of another example of a possible embodiment of an optical beam splitter.

9A is a perspective view of an optical beam splitter consisting of four planar parallel thin plates formed of translucent mirrors of thickness greater than 0.4 mm, in accordance with the present invention.

Fig. 9B is a perspective view of the same optical beam splitter as in Fig. 9A except that it consists of three s.

FIG. 9C is a cross-sectional view perpendicular to the plane of the plate, in which the central portion of the beam distributor according to FIG. 9B is enlarged. FIG.

Figure 10 illustrates an arrangement of one embodiment of a binocular display device.

11 is a perspective view of the apparatus of FIG.

12 is a plan view showing an embodiment of the binocular device according to the present invention without an outer frame.

Figure 13 is a perspective view of the device in the small outer frame according to Figure 12 with the alternative mirror seen from the receiving direction fixed;

14 is a perspective view of another example of a binocular display device with a suitable alternative mirror fixed thereto.

FIG. 15 is a plan view showing the operating mechanism of the slider of the apparatus of FIG.

Figure 16 is a perspective view of the assembled form of the apparatus of Figure 15;

17 is a perspective view showing the structure of another embodiment of the binocular display.

FIG. 18 is a perspective view of a clip adapter used in the apparatus shown in FIG. 17. FIG.

Fig. 19 shows an embodiment of a binocular display apparatus in which a suitable eye mirror is inserted toward a focusing element in a form suitable for a camcorder.

Fig. 20 shows the alternative mirror unfolded in the same apparatus as Fig. 19 suitable for the camcorder.

Fig. 21 is a perspective view of another embodiment of a binocular display device according to the present invention, in which an alternative mirror is unfolded during use, in a form suitable for a mobile telephone.

Figure 22 is a plan view showing one embodiment of the device of the present invention, including a reflective microdisplay device and an LCD shutter.

Figure 23 shows one embodiment of the device of the present invention connected to a holder such as a spectacle frame.

Figure 24 is an embodiment of an optical beam splitter according to the present invention having a micro display driving circuit, a radio frequency receiving and transmitting circuit, a power source, and a microprocessor.

Fig. 25 is a perspective view showing one embodiment of the device of the present invention with an eye movement detection system.

Figure 26 illustrates a vision aid and night vision imaging device implemented in accordance with the present invention.

Figure 27 is a plan view of one embodiment of a binocular device in accordance with the present invention, including a reflective micro display and an element displaying it in front.

Figure 28 is a side view of the apparatus as in Figure 27.

29 is a perspective view of a binocular display device, which may be worn on the wearer's head and neck with a necklace.

The beam splitter according to the invention is characterized in that the two beams of ininfinitely thin translucent mirrors partially conduct and partially reflect the light beams so that the light beams reach perpendicular to their intersections parallel to the bisector of the mirrors. Since it is completely distributed and directed in two directions, it is theoretically based on the recognition that it is suitable for solving the four listed problems simultaneously. In reality, however, there is no infinitely thin plate, and the ultra-thin glass plate is broken or the ultra-thin plastic plate is bent. The thicker the plate, the larger the shadow band at the intersection of the mirrors. This intersection area acts as a specific-optical-meaning like an opaque body, causes strip shadows in the image, and increases reflection fading. This shadow band makes it extremely uncomfortable for a person to see the picture, and in most cases-especially for video pictures or computer screens-it is unacceptable. Nevertheless, it has been recognized by the present inventors that the light beams consist of planoparallel plates perpendicular to one another, and that the cross sections which meet each other along one edge and start at that edge are optical planes and are to be distributed starting from that edge. If an optical beam splitter is produced with a translucent reflecting side on the side, the planar parallel plate is furthermore a contiguous plane of one or two transparents, the plane being one of the translucent or total reflecting surfaces constituting the transparent body. In contact with the one or two transparent bodies to coincide with, the shadow area can be completely eliminated, and the optical splitter can be manufactured to meet all the requirements for the four tasks.

In addition, the beam splitter according to the present invention projects the optical splitter onto a planar plate of minimum thickness to project the X-shape for a specific application-using a suitable holder to ensure sufficient safety against breakage. It can be assembled into a single device to make the shadow bands insignificant or virtually or almost invisible, so that the shadow bands do not adversely affect the proper operation of the beam splitter, while at the same time breaking and bending It is based on the perception that it is prevented properly.

The binocular image display apparatus according to the present invention is based on the recognition that it can be configured with a minimum size and weight under the following conditions.

Since the beam is directed from side to side in the same volume, the light beam starting at the screen of the microdisplay is divided by two reflecting surfaces, having a size corresponding to that screen and intersecting with each other by X.

Since the optical planar plate has two consecutive reflecting surfaces, the optical beam distributor having the minimum weight is an optical beam distributor according to the present patent application.

Focusing elements arranged in optical paths close to the two opposing sides of the optical beam splitter allow for the most compact arrangement while maximizing microdisplay magnification.

The shape of the focusing element is a parallelepiped coinciding with the cross section of the prism or a pyramidal light path exiting from the parallelepiped screen, and the alternative mirror shape is a trapezoidal cross section corresponding to the light path of the pyramid. The size of the focusing element is minimal.

-Alternative mirrors with minimum size must be placed exactly in front of the pupil. Otherwise, you will not be able to see the complete picture in that mirror. The direction of life setting should be the optical axis of the focusing element.

-

When only the microdisplay, the X-mirror optical beam splitter and the focusing element are included in the case where the alternative mirror is attached to the bracket, the external size of the apparatus is minimal.

When not in use, the size of the device can be further reduced by folding the combined mirrors.

The device which can be minimized by the measurement is so small that it can be arranged crosswise in the housing of the mobile phone and its weight is also very light so that it can be transported when worn on the head (eg helmet, headband or eyeglass frame or noise clip). Is not required and can be fixed to the noise bridge with a clip.

-When a device that can be clipped to a noise bridge is not used, it is most desirable to wear it like a medal on a retaining loop similar to a necklace. In this case, the device will always be "at hand" similar to a wrist watch and ready to use if needed.

By forming a support loop with an electric cable and mounting two earphones for the opposing parts, in this case the mechanical support means of the earphone becomes the electrical connection cable itself, thus providing a device for providing image and sound in a very simple manner. It can be formed as.

In terms of weight, volume distribution and aesthetics, the control unit acts on the nape of the neck, while the other electronics necessary for the operation of the display device are preferably located as far as possible from the display device.

Microdisplay drive electronics for the purpose of wireless connection with external refracting, data and video signals (e.g. mobile telephones, portable computers, game consoles, DVD players, digital television transmitters); It is preferable to install any one of a high frequency transmitting and receiving unit circuit, a digital television receiving circuit, a microprocessor and a power source.

In addition, since the apparatus can be used as an information equipment terminal or an independent information equipment, it is practical to install a microphone in the display housing.

Based on this inventor's perception, the present inventor has developed a personal communication device which can be worn continuously in the following manner and can be achieved in the sensory organs of the head.

a. One of the earphones is placed in one ear, and the user speaks into the microphone on the neck (mobile phone function).

b. The two earphones are placed in each ear separately (the sound being heard has better acoustic, i.e., stereo sound), and the user speaks into a microphone placed in the neck or supported in front of the mouth.

c. The display device is clipped with a noise bridge (virtual monitor function).

d. The display device is clipped with a noise bridge and one or two earphones are placed in the ear (video glasses function with mono or more sounds, ie stereo sound characteristics).

In addition, the inventors note that the display unit can be complemented with a small video camera that further extends its functionality, as described in detail below.

Based on the recognition described in detail above, the inventors have solved the problem posed by the new optical beam splitter. The optical beam splitter includes a transparent planar plate starting at a common intersection of light reflecting surfaces branched towards the light beam to be distributed,

The cross-section of the plane parallel plate, starting at the common intersection and adjacent to the side of the plane parallel plate with the light reflecting surface and perpendicular to each other, is perpendicular to the side, the side being the plane and the optical plane. Equipped,

At least one transparent body, made of a transparent material, is in contact with the plane parallel plate having a translucent reflecting surface or a surface consisting of a semi-transparent reflecting portion and a total reflecting portion, the surface being in the plane of the cross section, starting from the cross section and continuous It is characterized by.

According to the present invention, a preferred embodiment of the optical beam splitter is

Further comprising third and fourth planar plates which are continuous in the first and second planar plates with light reflecting surfaces branched towards the light beam to be distributed and abut the first and second planar plates as a transparent body. ,

All of the planar parallel plates are made of the same material, having the same thickness and the same refractive index, are oblate parallelepiped shapes, bonded to each other with parallel edges to each other, and cross-shaped at right angles to the joined edges; Forming a unit.

Practically, in the present beam splitter device,

a) a width measured from an edge of the side of the first plane parallel plate facing the adjacent second plane parallel plate and the side opposite thereto, preferably from an edge coupled with the fourth plane parallel plate,

The phosphorus portion (where v is the thickness of the planar plate and n is the refractive index of the material),

The width s according to the formula measured from the side of the second planar parallel plate facing the first planar parallel plate and of the side opposite thereto, preferably from the corners associated with the third planar parallel plate Having part,

A side surface of the third planar parallel plate facing the second planar parallel plate adjacent to it, except for a portion measured from an edge associated with the second planar parallel plate and having a width s according to the equation,

A side of the fourth planar parallel plate facing the first planar parallel plate adjacent to it, except for the portion measured from an edge associated with the first planar parallel plate and having a width s according to the equation,

Is a translucent reflective surface,

b)-a portion of the side of the third planar plate which faces the adjacent second planar plate, preferably having a width s measured according to the formula, measured from an edge associated with the second planar plate ,

A part of the side of the fourth planar plate facing the adjacent first planar plate, preferably having a width s according to the formula measured from an edge associated with the first planar plate,

Is total reflection,

c)-a cross section of the first planar plate, opposite the cross section of the third planar plate,

A cross section of the second planar plate, opposite the cross section of the fourth planar plate,

Is an optical plane.

Here, the inventors note that all of the side surfaces of all planar parallel plates are natural and optical planes separately. The optical plane is known as a plane having a surface roughness smaller than δ = 10 Pa · A, and the translucent plane is known to be partially transmitted and partially reflecting natural light or polarized light.

The defined structure of the light beam splitter comprises first, second, third and fourth planar parallel plates of thickness v and index of refraction n, the planar parallel plates of the first and third planar parallel plates. The two sides are in contact with each other with the same side, and similarly, the two sides of the second and fourth planar parallel plates are arranged in an X shape with each other in contact with the same side.

The first cross section of the first planar parallel plate facing the third parallel planar plate is on the same side as the side surfaces of the second and fourth planar parallel plates facing the first planar parallel plate and is an optical plane. The second end face of the second planar plate facing the fourth parallel plane plate is on the same side as the side of the third planar plate facing the second plane parallel plate and is an optical plane.

A side surface of the first plane parallel plate facing the second parallel plane plate, a side surface of the second plane parallel plate facing the first plane parallel plate, and a third plane parallel plate facing the second plane parallel plate. And a side surface of the fourth flat parallel plate facing the first flat parallel plate are translucent reflective surfaces. Since the first cross section is an optical plane that spectrally reflects a beam reaching the plane under a limit angle of total internal reflection, the translucent of the second planar planar plate and the fourth planar planar plate The reflective surface is formed into a continuous reflective surface. Similarly, the translucent reflective surfaces of the first and third planar parallel plates are formed as continuous reflective surfaces.

A direction coinciding with the bisector of the translucent reflective surface of the first planar parallel plate and the second planar parallel plane and perpendicular to the intersection of the translucent reflection surface is called a reception direction. This is because the X-mirror optical beam splitter described above completely splits the incoming beam in this direction. The rectangular region between the outer parallel edge of the translucent reflection surface of the first planar parallel plate and the second planar parallel plate, which is a plane perpendicular to the reception direction, is called a receiving side. The reason is that the object source can be arranged in this area or further away from this area.

The beam propagating outside the region where the mirrors intersect each other meets the translucent reflecting surface twice (when reflecting from and passing through the reflecting surface). That is, the light sensitivity of the beam is doubled. The same intensity needs to be ensured in the case where the maze crosses the area crossing each other. Otherwise, the part of the projected image formed by the beam once filtered will be brighter. In practice, this is represented by disturbing bright lines across the center region of the image. According to the inventor's recognition, this problem can be completely solved by the solution according to the present invention described above.

In addition, an aspect of the invention provides an optical beam splitter comprising a transparent planar parallel plate starting at a common intersection of light reflecting surfaces branching towards a light beam to be distributed, each having a thickness of 0.4 mm or less and a cross section perpendicular to the intersection. Four planar parallel plates forming a shaped unit, wherein adjacent planar parallel plates form an angle of 90 ° ± 20 ° to each other, the planar parallel plates completely transmitting the optical element polarized in one direction And a translucent mirror or polarizer which partially transmits and partially reflects the optical element polarized in the other direction.

Other optical beam splitters, in optical beam splitters comprising a transparent planar parallel plate starting at a common intersection of light reflecting surfaces branching towards the light beam to be distributed, each of which has an X-shaped unit in a cross section perpendicular to the intersection Forming three planar parallel plates, wherein the two planar parallel plates, which are shorter than the third planar parallel plates, abut on the center at the face of the third planar parallel plates, and each other on each side of the thin third plate Successively formed, wherein the angle between the long planar parallel plate and the short planar parallel plate in the unit 22 is 90 ° ± 20 ° with respect to each other, the planar parallel plate completely transmitting the optical element polarized in one direction And a translucent mirror or polarizer, in which the optical element polarized in the other direction partially transmits and partially reflects.

Another aspect of the present invention is a binocular image display apparatus having an optical beam splitter, and further comprising a first focusing element and an alternative mirror. The binocular image display apparatus is characterized in that the optical beam splitter is an optical beam splitter according to the present invention, wherein the two of the optical beam splitters are viewed in the direction of the beam reaching the translucent reflective surface of the optical beam splitter, that is, the receiving direction. Two first focusing elements are located on opposite sides, a common optical axis of the first focusing elements is perpendicular to the receiving direction, and the alternative mirrors are located on both outer sides of the first focusing element, The reflecting surface forms a 45 ° ± 15 ° angle (δ) with the optical axis, and the intersection of the plane of the alternative mirror reflecting surface with the mirror-crossing intersection of the translucent reflecting surface of the light beam splitter. Characterized in that it is parallel or vertical.

Preferably, the optical beam splitter, the first focusing element and the alternative mirror are encased in a cover including a light accepting opening in front of the alternative mirror and on the receiving side of the optical beam splitter.

Furthermore, more advantageously, the optical beam splitter and the first focusing element are fitted in a housing covered with a cover plate and having a light tolerance opening in the first focusing element, wherein the alternative mirror is a toothed rack. And attached to a first slider and a second slider having a stem protruding into the housing, the first slider and the second slider being parallel to each other and connected to the first and second sliders in between and moving in opposite directions. There is a cog wheel.

According to a further configuration, the device comprises an object source such as a screen of a microdisplay. In this case, it is preferable that the plane of the microdisplay screen is parallel to the plane defined by the mirror-crossing intersection and its optical axis and arranged on the receiving side of the optical beam splitter. In addition, the device preferably includes at least one light source disposed between the intersection of the planar parallel plate of the optical beam splitter and the device case, such as an LED, to illuminate the screen of the microdisplay.

In addition, it is practical to include a light source disposed between the micro display unit and the device case to illuminate through the micro display unit from the rear. According to yet another configuration, in the optical paths on two sides of the optical beam splitter there is a liquid crystal shutter perpendicular to the axis of the focusing element.

The device preferably comprises two clip plates manufactured integrally with the device case.

Another embodiment of the image display device is characterized in that there are two hook rails on the side of the device case, adjacent to the head of the user of the device, which are integrated with the device case and whose generation portions are parallel to each other. Preferably, the device comprises a clip adapter mounted between the hookrails. The clip adapter is practically composed of a bending plate leading to the bent portion of the dent in the device case, two clip plates, and an elastic wing plate having an overall width equal to the distance between the hook rails.

According to another configuration, the device includes a pair of spectacle side arms, a bridge connected to and attached to the connecting structure, a co-support arm attached to the bridge, and a bearing frame composed of the device fixing part. do. The bridge is a narrow plate having a top surface coinciding with or parallel to the plane deployed on the spectacle side arm, the maximum thickness s of which is preferably 1.7 mm. In addition, the nose support portion is composed of two nose support arms facing downwards and parallel to each other and equidistant from the center of the bridge, and two nose support pads respectively attached to ends of the nose support arms, the apparatus The fixing portion is preferably composed of two U-shaped fixing rails facing downward and parallel to each other and installed at the same distance from the center of the bridge.

Embodiments of the image display apparatus are characterized by including at least one micro display driving circuit and / or a high frequency transmission / reception circuit and / or a power source and / or a microprocessor.

According to a more preferred embodiment, on one end of the case there is a CCD image recording chip that senses an infrared region, on the other end of which the front lens has a third optical axis of the front lens. It is arranged to be perpendicular to the detection surface of the. Above the alternative mirror of the right eye, a reflecting element reflecting in the infrared region and allowing light in the visible wavelength region is arranged in the optical path between the right eye and the detection plane. Preferably, above the front lens, there is an infrared LED, and the light is guided toward the reflective element.

Further, a CCD image recording having a detection surface on a plane parallel to the plane defined by the optical axis of the first focusing element and the mirror-crossing intersection on the dent of the device case formed to fit the nose. It is practical to have a chip, and before that there is a second front lens with the optical axis perpendicular to the detection surface, on the microdisplay unit.

In the configuration below, the inventor uses a reflective microdisplay that is required to be projected at right angles to the screen surface. In this example, it is preferable to form an X-mirror optical beam splitter with an ultra-thin (0.1-0.2 mm thick) planar parallel plate and to illuminate the screen through it. For the purpose of illumination, the inventors have shown that the reflecting or focusing elements are spaced between two planar parallel plates spaced from the screen (or in the case of a beam distributor formed of planar parallel plates, the farther flat parallel plates and their Spaces between parallel plane plates half a distance away. This is the light of the light source, preferably an RGB LED tricolor light on the screen. For light from a light source illuminating the screen or light reflected from the light source to the X-mirror between the light source and the beam splitter, the inventors have arranged a polarizing plate to polarize in one direction, and in another direction (right angle in the previous direction) in the optical path. And polarizing plates on both sides of the beam splitter to be polarized. Thus, the light beam reflected from the screen and whose polarity is changed passes through the two polarizing plates described below.

If the light reflecting surface of the X-mirror beamsplitter is an optical layer that partially reflects and partially transmits the polarized light, in this case, the number of optical planes or optical elements, which causes a large optical loss, is reduced and thus Thus, compared with the intensity of the example described above, the light intensity reaching the eye can be increased several times, or the same light intensity can be obtained with a smaller capacity light source consuming less power.

In another configuration, both ends of the flexible support loop face each other of the console including the micromirror, the engineered beam splitter, the focusing element, the alternative mirror, the alternative mirror of the display device having an alternative mirror, the display housing and the noise clip bridge. It is fixed at both ends. Here, the loop is an electric cable, and there are earphones fixed to the branch mechanically and electrically. The length of the support loop is longer than the circumference of the wearer's head at nose height. In the support loop portion farthest from the display device, there is a control unit including an electronic device for driving the display, a power supply fan, a microprocessor, a high frequency transmission / reception circuit, and a digital television receiver circuit. One branch may be permanently fixed and the other branch may be detachably fixed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings include a preferred embodiment of an optical beam splitter and will aid in understanding not only its function but also an example of an advantageous embodiment of a dual recognition image display device.

As shown in Figs. 1 and 2, the X-mirror optical beam splitter is shown in a cross-sectional view perpendicular to its mirror-crossing intersection (4) and has a flat parallel plate (1, 2) having a transparent surface and a half-glazed surface. And 3). The figure shows only the intersection of the reflecting surfaces. The planar parallel plates 2 and 3 produced by the general cutting process have non-planar, rough and thin surfaces 2a and 3a, and are in contact with the side surfaces perpendicular to the wide sides of the planar parallel plate 1. Implemented in this manner, as shown in Figs. 1 and 2, the width t region does not participate in the reflection of the light beam indicated by the sign 5 and the arrow. For clarity, Fig. 1 shows only the light beams a-k traveling to the left, and Fig. 2 shows the light beams traveling to the right.

As shown in Fig. 1, when the beam a reaches the translucent reflecting surface of the plate 1, half of the intensity is reflected back at right angles and proceeds to the inside of the plate 1 at the other half of the intensity. The beam reflected back to the right angle reaches the translucent reflective surface of the plate 2 and is partially reflected back toward the object source (not shown) at a quarter of the intensity, and then refracted, then one quarter of the intensity The furnace proceeds to the interior of the furnace plate 2 and, after being refracted again, to the left—in the direction taking into account the state shown in the drawing—to the right angle in the receiving direction 5 indicated by the arrow. The other beams b, c and d have the same beam path.

The beam e first reaches the translucent refracting surface of the plate 2 and is partially reflected back at right angles towards the plate 1, from which it is directed towards the object source. It is then partially refracted and then propagated into the interior of the plate 2 to be dispersed at the plane 2a of the plate 2, which is not flat and rough, ie not an optical plane. Beams f and g have the same beam path. When the beam h, i, j, k reaches the translucent refracting surface of the plate 2, it is reflected back to the plate 1 at half of its intensity and directed toward the object source, and partially, half of the intensity. After being refracted, it proceeds into the interior of the plate 2, which is then released after being refracted to reach the translucent reflective surface of the plate 1. Here, one quarter of the beam (f, g) intensity is reflected back and emitted, and the other quarter is refracted and then proceeds into the interior of the plate (1). As best shown in Fig. 1, the beams g, f and e in the range between the beam d and the beam h do not participate in the image display on the left side, and have a predetermined width t in the image. For providing a screen (i.e. a shadow area) with

2 are used similarly to their meanings in FIG. 1. Beams a-e and i-l join the image display on the right side, as described in connection with FIG. However, the beams f, g, h in the range between the beam e and the beam i are scattered on the face 3a of the plate 3, not on an uneven and rough, ie optical plane. Therefore, in this case as well, the region having the predetermined width t does not participate in the reflection.

3 shows an example of the configuration of an optical beam splitter according to the present invention. The distributor has a first planar parallel plate 6 and a second planar parallel plate 7 and has a transparent body 10 made of a transparent material. According to this configuration example, the thicknesses of the plates 6 and 7 are different from each other. The plates 6, 7 are mutually joined at their corners 9a, 9b, and the sides 6a, 7a, which are opposed to each other and start at their corners 9a, 9b and are made of translucent reflecting surfaces, are α = 90 ° from each other. At an angle (in Figure 3, in cross-section perpendicular to the combined edges 9a, 9b, the cross-sectional portion making up the light beam splitter is shown). Cross sections 6b, 7b starting at the sides 6a, 7a and perpendicular to the sides (i.e., β of FIG. 3 is 90 °) are optical planes, meaning areas polished until perfectly smooth and transparent. (optically flat). As a result of the geometric conditions described and shown above, not only faces 7a and 6b which exist on the same plane, but also faces 10a and 10b of the transparent body 10 which are contiguous to the same plane and the planes 7a and 7b Is also a translucent reflective surface. As will be described later, the surface of the transparent body 10 in contact with the end face 6b, 7b does not play any role if the body 10 is transparent, so it is necessary to fill the space of the transparent body 10 between the end faces 6b, 7b. It should be noted that there is no.

According to Fig. 3, when the light beam starting from the receiving direction 5 indicated by the arrow reaches the translucent reflecting surface of the planar parallel plate 6, it proceeds partially into the interior of the plate 6 and at its cross section 8 Reflected and then emitted on opposite sides. It is also partially reflected back to the reflective surface of the other planar plate 7, where the light beam is partially reflected back (which is not shown) and then partially enters the plate 7 and is reflected On its opposite side. The light beam a is distributed in the beam a 'and the beam a "perpendicular to the receiving direction 5 and emitted in opposite directions toward the left and right eyes.

The configuration example of the optical beam splitter according to the present invention, shown in FIG. 4, comprises four transparent planar parallel substrates, i.e., first, second, third and fourth planar parallel substrates 11, having the same width v. 12, 13, 14). In order to emphasize the translucent reflective surfaces of the side surfaces 11a and 12a of the plates 11 and 12 bonded to each other at the edges 9a 'and 9b', they are indicated by dotted lines. By definition of the elements, plate 11 is the first plate, plate 12 is the second plate, plate 13 is the third plate, and plate 14 is the fourth plate. The angle α and the angle β are also right angles in this case, and the thin sections 11b and 12b are optical planes. In the optical beam splitter shown in Fig. 4, the planar parallel plates 13 and 14, instead of the transparent body 10, have edges 15d and 15e of the first plate and edges of the third plate. 15f) is different from the optical beam splitter shown in FIG. The second and third plates 13 and 14 abut each other at their edges 15g and 15h, and their cross sections 13b and 14b are not ground and need not be optically flat, but are also side surfaces 12a. The side surfaces 13a and 13b, which correspond to the same plane as the cross section 12b, have a translucent reflective surface, indicated by dashed lines in the figure. The space 8 is empty, for example filled with air. Fig. 4 shows a cross section of the intersection area of the planar parallel plates 11, 12, 13 and 14, perpendicular to the edges 15a and 15b and the other part.

The light beam reaches the device shown in FIG. 4 from the direction of the arrow 5 (object source direction). Surfaces 11a and 12a face the object source. Hereinafter, the path of the light beam a-1 will be described. The beams a-d are reflected at 90 ° from the translucent reflecting surface of the side 12a of the plate 12 and travel at half the intensity along the path to the face 11a of the plate 11. After refraction, the beams a-d enter the plate 11 at a quarter of the intensity, and after being refracted are emitted at right angles to the receiving direction 5.

The beam e is refracted on the translucent reflective surface 11a, which is the side of the plate 11, and then enters the plate 11 at half the intensity, and optically in the end face 11b of the plate 11 without loss. It is reflected from the inner surface that is planar and emitted at the opposite side 11a 'after being refracted again. This emission direction (the direction of the optical path is clearly indicated by an arrow shown by a line) indicates that the angle γ between the side surfaces 11a and 11a 'of the planar plate 11 and the end face 11b is Light beam ad at any value of the refractive index n, because it is 90 ° and the light beam e reaches an angle from the side 11a ', which is the same as the angle entering the plate 11 from the side 11a. It exactly coincides with the emission direction of. Due to this fact, the light beams d, e, f, g, h also participate in the image display, and as a result, as shown in Figs. 1 and 2, shadow lines scattered in the center region of the image are removed. can do.

In addition, for the light intensity, the beam (e.g., beams e, f, g) in the range between the beam d and the beam h shown in FIG. 4 also meets the translucent plane twice, and thus Due to this, one quarter of the strength should be ensured to be emitted from the opposite side 11a of the first planar plate. This can be realized by providing the side face 11a 'with side portions having a width s in which beams d, e, f, g are emitted from the translucent reflecting film. This area 11a "on the side 11a 'is indicated by a dotted line. As well as the beams i and j reaching the range between the beam h and the beam k, the beam k itself Passed through the semi-transparent reflective surface 11a of the first planar parallel plate 11 and refracted, half of the beam intensity enters the first planar parallel plate 11, and the translucent reflective region 11a "of the side surface 11a '. After refraction at), it is released at 1/4 of intensity.

In order not to further reduce the intensity of the beam by the additional translucent reflecting surface, a total reflection film is provided on the portion 11a '-highlighted by dark black lines-having a width s of the side 14a of the fourth planar plate. Thus, the beams i, j, k are reflected at the mirror surface 14a without actual loss and are emitted at one quarter of the intensity to participate in the image display. Finally, when all the light beams, including the beam a to the beam l, up to the beam l after the beam k, reach the translucent reflecting surface of the side 11a of the first planar plate 11 The beam is refracted and enters the first planar plate 11 at half its intensity, and is then refracted at the opposite side 11a 'of the first planar plate 11 and then emitted at the same intensity of light. And reflected from the translucent reflecting surface of the side face 14a of the fourth flat parallel plate 14, it is emitted at a quarter intensity and participates in the image display.

Since the optical beam splitter shown in Fig. 4 is a symmetrical structure, the path of the beam reaching in the receiving direction indicated by the arrow 5 and toward the right side of Fig. 4 with an image display (not shown) is a mirror image and a mirror image. It is similar to the image display on the same left side. Thus, regions 12a "and 13a 'on the sides 12a and 13a are marked (section 12a" has a translucent reflective surface, while section 13a' is a total reflection surface).

Fig. 5 shows the conditions of angle and distance based on the width v which can represent the thickness v of the plate 11 and the refractive index n of the material. In FIG. 5, the beam h reaches the translucent reflection surface of the side face 11a of the first plate 11 at the incident angle [epsilon], and proceeds along the path at the refractive angle [epsilon] '. Even if this angle changes, it reaches the point where the opposite side surface 11a of the 1st planar parallel plate 11, and the 1st end surface 15 meet at the same angle.

In the right triangle formed by the edges (s, v, c),

In fact, the light beam originating from the object source is incident not only from the receiving direction 5, but also from many other directions within a predetermined angle range. Optical plane cross sections 11b and 12b can be demonstrated to play a full role in image generation. However, the face should be mercury plated. Without such plating, there would be an incident beam at an angle less than the critical angle for total reflection.

For light beams that are not parallel to the receiving direction,

The above formula is not valid. Different angles of incidence include slightly different widths. Nevertheless, since the average is s, in practice, the width can be used in any case.

Figure 6 is a perspective view of a complete optical beam splitter according to the present invention, constructed as shown in Figure 4 but shown in smaller size. Reference numerals are used similarly as before. The planar parallel plates 11, 12, 13 and 14 are cuboids arranged on the sides of the ABCDA'B'C'D 'quadratic prism. The first of the two successive reflecting surfaces, intersected with each other in an X-shape (here, for the sake of clarity, the drawing is not clearly drawn and has not been given a reference number, but is clearly shown in FIG. 4 and is well explained. Is,

Is formed by the translucent reflective side of the first planar parallel plate 11, defined by the corner point JAA'K,

Is formed by a spectrally reflecting cross section of the second planar parallel plate 12, defined by the corner point ABB'A ',

A semi-transparent reflective surface portion of the side of the third planar parallel plate 13, defined by the corner point HNOH ',

Is formed by the surface portion of the totally reflecting BHB'H 'of the fourth planar plate 14, defined by the corner point BHH'B'.

On the other hand, the second reflective surface is

Is formed by the translucent reflective side of the second planar parallel plate 12, defined by the corner point ALMA ',

Is formed by a spectroscopically reflecting cross section of the first planar plate 11, defined by a corner point ADD'A ',

Is formed by the surface portion of the totally reflecting DFF'D 'of the fourth planar plate 14, defined by the corner point DFF'D',

It is formed by the semi-transparent reflective surface part of the fourth planar parallel plate 13, defined by the corner point FPOF '.

Also, for light intensity, the plate 12 side, defined as the corner portion BGG'B 'and the surface portion of the trailing side of the first planar parallel plate, defined as the corner point EDD'E'. Semitransparent reflective film is provided on the surface part.

FIG. 7 shows a practical method of attaching the planar parallel plates 11-14 of the X-type optical beam splitter 22, made of a transparent material such as glass, according to the configuration of FIGS.

According to this method, the X-shaped device is fitted into an X-shaped slot 18 carved into the surface of the bearing plates 17 and 19 having a thickness of v 'greater than v (but the slots on the surface of the bearing plate 17) 18 only)). The bearing plates 17 and 19 are parallel to each other and the slots are carved on the surface to face each other. In fact, the width of the slot is the same thickness as the width v of the plates 11-14, and the depth is adapted to the size of the plate to be inserted into the slot. The faces of the bearing plates 17 and 19 are perpendicular to the faces of the planar parallel plates.

In the above structure, the lower plate of the two square bearing plates 17 and 19 is provided as the base plate, and the upper substrate is provided as the cover plate. The plates 11-14 are fixed in the slots 18 which are geometrically aligned diagonally of the bearing plate with the surface of the vertical cross section of the reflecting surface. In this structure, the plates 11-14 join along the edges 9 in such a way that the four planar parallel plates are each in contact with one corner at one edge and surround the through prism whose cross section is an empty secondary prismatic region 8. .

Figure 8 shows an embodiment of another practical structure of the light beam splitter. According to this structure, the flat parallel plates 11 and 13 as well as the flat parallel plates 12 and 14 have a width v, a length v and a depth v, It is made of a single plate in such a way that one of the cross sections is partially connected. This structure has a downward open gap 20a having a cross-sectional size of v · v · v between the plate 12 and the plate 14 and the same size between the plate 11 and the plate 13. This can be achieved by forming an upward open gap 20b having both sides (of course, both gaps 20a and 20b have their sides open). That is, the side surfaces of two pairs of plates formed of a single plate become one surface in pairs, and are connected to each other at a distance v by a portion 20 having a size of v · v · v. The plates 11, 13 and the plates 12, 14 having the gaps 20a and 20b, respectively, are fixed by guiding and fitting well to each other, or fixed to each other on their contact surfaces by known methods. The optical beam splitter portion formed in this way and shown at the bottom of FIG. 8 has a width v measured from an edge surface perpendicular to its mirror-crossing intersection. This part does not participate in the video display. The reason is that, after the two plates are guided to each other, the spectroscopically reflecting portion of the second end face 16 of the second planar parallel plate 12 and the first specular parallel plate 11 are spectrally reflected. This is because the cross section 15 has only an mv length.

According to another structural form not shown in the drawing, a square flat parallel plate made of a transparent material is an injection-molded plastic plate, and a fixing pin is formed on an edge surface perpendicular to the intersection of the reflective surface and in an axis parallel to the intersection. It can be fitted with holes on the receiving optical device.

There are several other ways of attaching a planar parallel plate of an optical beam splitter according to the invention. If the thickness of the planar plate is much smaller than the diameter of the pupil, rather than the bright line described above, a slightly lighter line will appear on the image, so the widths edges of the planar plate become reflective or It is not necessary to provide a translucent reflecting film, and in certain applications, the scattering resulting therefrom is not so great as to question the applicability of the device. If the thickness of the planar parallel plate approaches the "infinitely thin" theoretical thickness, the translucent reflecting surface of the X-mirror light beam splitter can form a continuous surface even without the optical plane cross section described above. The shadow of the intersecting area may disappear from the image. In the case of very thin flat parallel plates having a thickness of 1/10 or 2/10 of a maximum of 1 mm, they can be easily broken, for example between the rigid bearing plate and the cover plate with the slot shown in FIG. It can be fixed to. This configuration is shown in Fig. 9A. Here, the bearing plates 17 and 19 are formed together by the rib or the back plate 21 at one side, and the 0.1-mm flat parallel plate is arrange | positioned at a U-shaped yoke. The planar parallel plate fixed to the yoke forms an X-shaped device as shown. Fig. 9A shows the plates 11 ', 12' and 13 'which are arranged and fixed in X-shaped slots on the sides of the plates 17 and 19 facing each other. In FIG. 9B, the intersections of the planar parallel plates 11 ', 12', 13 'according to FIG. 9A are shown enlarged in a cross section perpendicular to the mirror-crossing intersection. As shown, the beam splitter according to the invention consists of three plates. In this case, the planar parallel plates 11 ', 13' are joined in accordance with the center portion of the thin planar parallel plate 12 'which is twice the length of the other plates so that they are connected to each other on opposite sides.

10 and 11 are plan views of the X-shaped optical beam splitter. The beam splitter is composed of four transparent planar plates (indicated here by a single sign), as shown in FIGS. 4 and 6. Two first focal elements 24 are arranged on both sides of the optical beam splitter. The translucent reflective surface of the device is indicated by the dotted line. The common optical axis 23 of the first focusing element 24 traverses the mirror-crossing intersection 4 in the planar parallel plate and coincides with the bisector of the translucent reflecting surface. It is an achromatic lens system composed of several elements, which in this particular example has four elements. In addition, the boundary is formed by a plane that is rectangular in shape in the direction of the optical axis 23 and coincides with the entire surface of the X-mirror optical beam splitter 22 parallel to the optical axis of the first focusing element 24. do. Two mirrors in front of the eye 25 are located on two sides of the first focusing element 24, the reflecting surface of the mirror having an angle of 45 ° ± 15 ° in the optical axis 23. The intersection of the reflecting surface of this mirror (not shown, outside the plane in this figure) is parallel to the mirror-crossing intersection 4. In FIG. 10, an incident beam (which is partially transmitted and partially reflected by the semi-transparent surface of the X mirror optical beam splitter 22 (also shown in FIG. 4) is guided to the left eye 26 and right eye 27 of the user ( The path of a) is indicated. The lenses of the focusing elements forming the four element achromatic lens system can be fixed together and attached to each other. As already mentioned, the first focusing element 24 is rectangular in the direction of its optical axis and is aligned with the mirror-crossing intersection 4 while coinciding with the two edges of the optical beam splitter 22 closest to the receiving side. The boundary is formed by a face having a vertical upper and lower boundary plane. The mirror in front of the eye 25 is a flat glass mirror in which the surface on the side of the first focusing element 24 is mercury treated. The shape is trapezoidal to match the shape of the light path, the two corners of which are parallel to the mirror-crossing intersections 4 and the other corners converge in the direction of the corner adjacent to the eye.

The binocular image display apparatus according to FIGS. 10 and 11 is a binocular display apparatus for magnification optics and instruments, such as endoscopes, laparoscopes, microscopes, and telescopes, due to its small spatial requirements and light weight and compact construction. Can be used comfortably. The elements of the device are practically attached to each other in each frame or case, ie in the frame or case of the instrument and optical device described above.

The image display apparatus according to FIGS. 12 and 13 also has an X mirror having two first focusing elements 24 and mirrors positioned in front of the eyes 25 on both sides thereof, similar to the configuration shown in FIGS. 10 and 11. An optical beam splitter 22. The device is located on the mirror front in front of the eye 25 and on the side of the X-mirror optical beam splitter 22 facing the receiving direction 5 and having a light admitting opening that matches the size of the light path. And 28b). In the light accepting opening 28a, there is a focusing element 29. As shown in Fig. 13, the case 28 encases the optical elements of the device in a compact manner. 13, the positions of the openings 28a and 28b can be seen well. The apparatus shown in Figs. 12 and 13 is a pair-recognition loupe according to its characteristics, and when the user sees through the light accepting openings 28a and 28b, the enlarged object source is at the focal length or adjacent to the light receiving direction in the light trace The image can be seen with both eyes. The object source at exactly the focal length appears to be at infinite distance. As the distance decreases, the virtual distance of the virtual image is also reduced, and can be set to a desired virtual image distance, for example, a typical half meter for viewing an object in a hand. In order to avoid scattering and to see the whole image, the center of the alternative mirrors should be approximately equal to the distance between the pupils of the person using the device, and for this purpose, depending on the pupillary spacing, which usually varies between 55 and 70 mm, What is needed is an apparatus with an eye mirror spacing. Indeed, it is sufficient to provide a twin recognition loupe with an increment of 3 mm (i.e. six intervals: 55,58,61,64,67,70 mm alternative mirror median spacing), and the user of the device The most suitable can be used. The advantage of this form is that it does not include any moving parts and does not need to be adjusted. On the other hand, the disadvantage is that they must be manufactured in six different sizes, and the same device cannot be used by different cosmic people.

The apparatus according to FIGS. 14-16 has an X mirror having a pair of first focusing elements on both sides mounted in a case having a light accepting opening in the center and one of two cross sections, illustrated in FIGS. 4 and 6. It is a binocular loupe with an optical beam splitter 22. On the inner sidewall formed by wall-thinning there is a ledge 31 and at the end of the sidewall there is a threaded fixing hole 32. The X-mirror optical beam splitter 22 and the first focusing element 24 are adjacent thereon with an insertion plate 33 supported on the ledge by a projection. There is a hole 34 in the center of the insertion plate 33, and on the two opposing side surfaces there are two pegs 35. On the projection there is a flange 36 which forms a constraint path from the outer side for the stem of the first slider 37 and the second slider 38 moving on the insertion plate 33. have. On the inner surfaces of the first slider 37 and the second slider 38 facing each other, a restricting path is formed by the cog wheel 39 and the pegs 35 of the insertion plate 33. When the cogwheel 39 rotates, the cogwheel 39 meshes with the cogwheel 40 made on the stems of the first and second sliders 37 and 38 to move the first slider in one direction. , Moves the second slider in the opposite direction. The gear 39 has a shaft and is manufactured integrally with a grooved wheel 41. The shaft of the grooved wheel fits downward into the hole of the insertion plate 33 and above the blind hole (not shown here) located in the center of the cover plate 43. The cover plate 43 is of the same size as the housing 30, and four open-end holes 44 at the corners of the cover plate have the same axis as the four holes 32 of the housing 30. Have In addition, together with the screw 45, the cover plate 43 may be fixed to the housing (30).

According to Fig. 15, when the grooved wheel 41 rotates in the first direction 46, the cogwheel 39 integrally formed with the wheel moves the first slider 37 in the second direction 47. The second slider 38 in the third direction 48. This movement is stopped by the projection at the end of the tooth rack 40 in one direction and by the stub at the inclined ends of the first slider 37 and the second slider 38 in the other direction. do.

According to Fig. 16, the cover plate 43 of the assembled device leaves the edge of the grooved wheel 41 free in a specific area. Rotating the grooved wheel 41 with the tip of a finger, at the same time, the alternative mirror 25 fitted to the first slider 37 and the second slider 38 in the direction of the housing 30 or vice versa. Move.

In the previously described embodiment, the alternative mirror is mounted on the slider inside the case to adjust the spacing between the alternative mirrors to fit the co-spacing along a direction parallel to the optical axis of the focusing element. This can be used. The sliders are cog wheels with axes parallel to each other, which are linearly moved by the restricting path, are connected to each other by cog wheels having axes fixed to the case, and are disposed between the toothed sides of the cog wheels. This allows the positioning of both alternative mirrors by moving the two sliders and the two alternative mirrors in parallel but opposite directions by rotating the grooved wheel adjusting on the same axis as the cog wheels. Since the translucent reflecting surface of the light beam splitter reduces the light intensity to one quarter of its original intensity, in practice it illuminates the object source to compensate for the reduced intensity, thus ensuring better illumination. It is therefore desirable if the device comprises a light source directed to an object source, for example a white light emitting LED and a small power source. The use of binocular loupes is far more beneficial than monocular loupes because they are more suitable for the way a person uses two eyes and do not need to close one eye or shed it. Therefore, when performing a long-term or frequently repeated medical and cosmetic research and precision mechanical work, using this pair recognition device can be conveniently worked. The binocular loupe, which is used specifically for the purpose of work, is worn on the user's head using a headband, a frame or a noise bridge clip. It is very beneficial if the binocular loupe is coupled to a spectacle frame with a headband or artuculated instrument. You can even push your forehead when you're not using it.

Hereinafter, the structure including the object source will be described. The object source is located in front of the receiving side of the X mirror optical beam splitter according to the present invention in a plane perpendicular to the receiving direction. The object source may be opaque, translucent or transparent, may be illuminated or passed by externally illuminated light, or may be illuminated or passed by a light source or self-luminous. According to a particular effective form, the object source may be a microfilm frame, a transparent film, a paper image, a drawing or printed text, an electronic screen or other object source.

According to the embodiment of Figs. 17 and 18, in front of the receiving side of the X mirror optical beam splitter 22, which is an image display device serving as a virtual display, on the side facing the arrow 5 indicating the receiving direction. There is a microdisplay unit 49 as an object source having a light emitting screen. The device 22 is surrounded by two sides by two focusing elements on each side, and outside of the focusing element is illustrated in FIGS. 10, 11, 12 and 13 as well as in FIGS. Likewise, there is one mirror before each eye. The plane of the screen 49a is parallel to the mirror-crossing intersection 4. The screen 49a is provided with the necessary voltage and electrical signals (not shown) via the cable 50. The X-mirror optical beam splitter 22, the first focusing element 24 and the microdisplay device 49 have a light accepting opening 51a, 51b between the mirror 25 and the first focusing element 24. It is mounted in the formed device case 51. On the side opposite to the micro display unit 49 between the microdisplay unit 49 and the planar parallel plates of the opposing 22, a dent suitable for a noise bridge formed by using a space not corresponding to the optical path. 52). On both sides of the dent 52 there is a hook rail 53 parallel to the mirror-crossing intersection 4 of the X-mirror optical beam splitter 22, due to which the hook rail 53 The device can be mounted on a bearing plate (not shown) using a width appropriate for the spacing between the bays of 53. For example, if the bearing plate is in the center of the frame, the device can be pulled up there. If it fits correctly, the device can move the bearing plate up and down and stop at any position, for example exactly in front of the pupil.

Mirrors in front of the eye 25 are each attached to a mirror support 54, which is supported by the slider 56 by a connection with an axis parallel to the mirror-crossing intersection 4 of the device 22. When the grooved wheel 57 is rotated with a fingertip, the connection can be studied in detail in Figs. 14 and 15 and can be moved by the gear-tooth gear method already described in detail (here Not shown). The mirror support 54, which has a bracket that extends in front of the eye and is connected to the connecting portion 55, can fold the mirror 25 together thereon towards the first focusing element 24. As such, the volume of the device can be significantly reduced. The actual size of the device that can fold the mirror (e.g. 1.5 x 2.5 x 3.5 cm) is so small that it can be stored in a hollow formed in a case (not shown) of a given video signal source after use. It can be connected to the connector formed on the case 51.

The clip adapter shown in Fig. 18 (denoted as one device by reference numeral 58) is a bent plate having the bend of the dents 52 in the case of the device according to Fig. 17, and the bend and It consists of a clip board 60 that follows, and an elastic wing plate 61 projecting on both sides toward the hook rail 53. The clip adapter 58 is attached to the device case 51 so that the end of the wing plate 61 is guided between the hook rails 53. In this figure, the position of the clip board 60 associated with the user's noise bridge is indicated by a dotted line. The clip adapter may be secured by applying a force to open the elastic plate. The clip plate 60 is fitted to the noise bridge from both sides at the position shown by the dotted line by the elasticity such as the nose glasses. In addition, the clip plate 60 may be integrally formed with the device case 51. In this case, the clip adapter 58 and the stud 53 are not necessary.

In the device according to Fig. 17, which is a virtual display device, an active-matrix electorluminescent (AMEL), organic light-emitting diode (OLED), field-emission display (AMED), and AMOLEP (active-) in front of the receiving side of the X mirror optical beam splitter. Light emitting object sources such as matrix organic light-emitting polymers, organic electroluminescent (OEL) or vacuum-fluorescent-on-silicon (VFOS) can be installed. As described above, the light emitting object is connected through a cable 50 from a video signal source (mobile phone, communication device, palmtop computer, DVD player, video game, video camera recorder, digital camera, etc.) executed by a user. The circle is provided with the voltage and electrical signals necessary for its operation. In addition, the apparatus according to the present invention may be installed in the video signal source. In this case, the user of the device should lift the video signal source up to his or her eye and see it as an alternative mirror of the binocular display. Using this combined solution can be advantageous when the binocular display device is fixedly viewed on a video signal source, and in particular, in the case of mobile phones, video cameras and digital cameras, the head can be taken out of the video signal source. Can be worn on. This embodiment is illustrated in FIGS. 19 and 20. Here, the apparatus according to the invention, shown in FIGS. 10 and 11, is applied as a view finder or as a monitor, on the opposite side of the objective 63, the palm coder 62, i.e. video. Embedded in the end of the camera, the optical axis 23 (not shown here) of the first focusing element 24 (shown in FIG. 20) is perpendicular to the second optical axis 64 of the objective portion 63. do. When not in operation, the binocular image display device closes the cover 65 by placing the alternative mirror 25 in a cavity provided inside the camera case. Pulling on the sliding button 66, the device mechanically connected thereto slides out of the cavity according to the restriction path formed in the camera case, while the cover 65 in front of it opens down and the alternative mirror 25 It is fully opened via the spring connection 55 (shown in Figure 17). In place of the mechanical drive mechanism, in another way, it is possible to configure the manner in which the device is pushed and pulled by the electric motor when the button is pressed.

In conclusion, the image display apparatus according to the present invention can be used as a view finder / monitor in another apparatus (camcorder) including a video camera and an image recording apparatus.

Typically, two types of viewfinders are used. One of them is a general monocular monitor that allows you to see the microdisplay embedded in the video camera through the front lens. This can cause you to feel unnatural and tired, and close your eyes. In another form, there is a foldable flat panel monitor on the case of a video camcorder. However, it is compact to suit the size of a portable video camera and can be up to half the size of a palm. Therefore, a very good image cannot be seen using this, and it is difficult to see a delicate image.

In the embodiment of Figs. 19 and 20, the image of the device can be seen locally by opening the alternative mirror out, or the device can be taken out of the video camera and worn on the head. Recent palm-sized video cameras (palm coders) are smaller than the gap between the pupils, so even if such a video camcorder is lifted up between two eyes, it cannot be seen with both eyes at the same time, and in order to do so, it must be like strabismus. The alternative mirror is screened to both eyes with the bearing piece extended. This is because there is a clear field of view for at least one eye in all directions around the opaque, bright and contrasting virtual image shown in the alternative mirror. In other words, the video camera actually disappears from view. For recording, it is advantageous to see the entire area around the image simultaneously, especially while looking at the image in the viewfinder with both eyes, and nothing is screened from that field of view.

According to Fig. 21, the apparatus according to the present invention is embedded at the end of the mobile telephone 67 as a viewfinder. In other words, the device becomes a viewfinder of the mobile telephone. The virtual image is displayed when the alternative mirror 25 is completely opened mechanically or by a motor.

Small screens provided in mobile phones are only suitable for displaying small screens or text information, and therefore cannot read Internet web sites or entire e-mail pages at this size, for example. For this reason, it is advisable to mount the device according to the invention in the case of a mobile telephone or to connect it to the battery charger connection terminal with an external adapter. According to Fig. 21, in the present embodiment, the apparatus may be installed at the end of the mobile telephone with the alternative mirror folded and lifted up to the front of the eyes, or may be taken out of the case of the mobile telephone and worn on the head.

An embodiment of an image display apparatus according to the present invention, shown in FIG. 22, includes a radial micro display, for example, an OLED 49. As shown in FIG. This embodiment is similar to the form shown in FIG. 17, and the reference numerals used therein are also used in FIG. In the optical path between the X-mirror light beam splitter 22 and the first focusing element 24, a liquid crystal shutter 69 having an image frequency of the microdisplay unit 49 in a changing phase and darkened or transparent under the influence of voltage. There is).

According to the embodiment shown in Fig. 23, the image display device, preferably the device according to Fig. 17, is attached to the head of the user using the bearing frame 70. Figs. The bearing frame 70 includes two metal eyeglass side arms 71, a metal bridge 73 connected to the connecting structure 72, two co-support arms 74 soldered to the bridge 73, and And a co-support pad 75 attached to the end of the co-support arm 74, and two U-shaped clapping rails 76 adjacent to the bottom and soldered to the bridge 73. Here, two overhanging ends on the side facing the microdisplay unit 49 in the device case 51 may be guided and slide up and down. The bridge 73 is a plate of similar material and similar size to the spectacle side arm 71, the upper surface of which is coincident with or parallel to the plane developed on the spectacle side arm 71. This makes the corners look outward when the user wears them. The maximum thickness of the plate is 1.7 mm, which is smaller than the pupil diameter, resulting in only translucent shadow lines. This does not interfere with vision. In another way, the nose support arm 74 is a tubular tube having an adjustable length (not shown here). By using this, the distance between the co-support pad 75 and the bridge 73 can be set, whereby the device attached to the bridge 73 and the alternative mirror 25 can be set vertically in front of the eyes.

According to Fig. 24, between the X-mirror optical beam splitter 22 (Figs. 4 and 6) or the first focusing element 24 pair and the device case 51 according to the present invention, the micro display driving circuit 77 ), A high frequency transceiver circuit 78, a power source 79 and a microprocessor 80. Using this arrangement, the device can be as compact as possible, and no wires are required for connection to control signals, video signals and power sources. The necessary calculations, image processing and other tasks can be solved locally.

According to the embodiment of Fig. 25, the apparatus includes a system for detecting eye movement. The apparatus is basically the same as the apparatus of Fig. 17, but unlike the apparatus, on the end of the case 51, there is a CCD image recording chip 81 which reacts with an infrared region, and on the other end of the front lens 82 Is a right angle to the detection surface 84 of the CCD image recording chip 81, and is reflected on the alternative mirror 25 of the right eye 27 in the infrared region and allows light in the visible wavelength region. ) And the beam starting from the pupil 86, the iris 87 and the copper membrane 88 of the right eye 27 by manufacturing a single device having an alternative mirror 25 at a predetermined size and a predetermined angle. Reflected to the detection surface 84 through the front lens 82. To illuminate the right eye 27, above the front lens 82 there is an infrared LED arranged at an angle at which infrared light from it is projected onto the reflecting element 85, where it is reflected and then projected to the right eye 27. do. The CCD image recording chip 81, the front lens 82, and the infrared LED 89 are provided in a case (not shown) coupled to the device case 51 with a light-receiving opening at the front lens 82 position. .

The image detected by the CCD chip 81 is analyzed by an image processing program by a microprocessor installed in the apparatus or connected through a cable. The microprocessor calculates, from the position and movement of the pupil and / or the iris contour, a point on the screen of the microdisplay unit that is viewed by the eye, and displays a cursor at that point, and also by the eyelid and / or the eyelid. Alternatively, the moment the iris outline winds up (blinks) is detected and clicked to interpret it as a command. In order to increase the contrast of the dark pupil and bright iris or its iris and the white part of the eye (in sclera) independently of external light conditions and the glare of the scattering eye, it is desirable to allow the iris and its surroundings to shine in the infrared. Do. This is because the user does not see the infrared rays and is not disturbed by the infrared rays.

The embodiment of Fig. 26 is a vision aiding device and a night vision device, and is basically the device of Fig. 17. However, unlike the device, a CCD image recording chip 90 is provided on the dent 51 formed to fit the nose. On the display unit 49 is a front lens 91 having an optical axis 92 perpendicular to the detection surface 93 of the chip 90. The CCD image recording chip 90 and the front lens 91 are encased in a cover (not shown), which is combined with an apparatus case having a light-receiving opening at the front lens 91 position. The detection surface of the CCD image recording chip 90 is such that the first focusing element 24 is parallel to the plane defined by the optical axis and the mirror-crossing intersection of the optical splitter 22 (intersection 4 in FIG. 17). Have a flat surface. The image recorded by the CCD chip 90 appears on the screen 49a of the microdisplay 49 (not shown in Fig. 26) at light intensity, which is several times the original intensity, depending on the actual setting. In this case, the use of the device is beneficial for people with low vision who are unable to properly orient in weak lighting conditions, for example in the evening or in incomplete lighting. If the CCD has a sensitivity near the infrared region, it can display an infrared image on the microdisplay screen to make it directional even in complete darkness, providing the user with an area emitted by the infrared light source.

As shown in Figs. 27 and 28, the microdisplay 49 disposed on the receiving side of the element 22 made of ultra-thin translucent mirror (shown in Figs. 9A-9C) is a reflection type, and the screen 49a is the above-mentioned. Illuminated from the front by a Fresnel lens 94 located on the other side of the element 22 (as seen from the display), most or all of which is located in the space between the planar parallel plates 13, 14, The Fresnel lens 94 projects the light beam of the LED 95 in parallel and projects it onto the screen 49a through the reflecting surface of the first polarizer 96 and the element 22. The light beam reaches the eye at the screen 49a through the X mirror element 22, the second polarizer 97a or the third polarizer 97b, the second focusing element 24 and the alternative mirror 25. do.

According to the embodiment of the bi-directional display device shown in FIG. 29, the binocular display device includes an alternative mirror 25a, a microdisplay 49b positioned between the alternative mirror 25a, a beam distribution element 22a, and a focus. Forming element 24a, display housing 56a, microphone 108, noise clip 60a, and a flexible retaining loop 105, longer than the wearer's head at nose level. The support loop 105 is formed entirely of an electric cable, and includes two earphones 106 and a control unit 107, one of the control unit 107 and the display housing 56a, which drives the microdisplay. Any of electronics, high frequency transceiver circuits, digital television receiver circuits, microprocessors, and power sources.

An advantage of the light beam splitter according to the invention is that only a minimum space is required, has a minimum weight, can be placed as close to the object source as desired, and the image of the device has excellent quality. Similarly, the binocular image display device requires a small space, has a small weight, is simple to manufacture, and can be applied in various applications.

The present invention is not limited to the embodiments of the dispenser or the apparatus mentioned herein, and other embodiments in which this can be realized are also within the scope of the protected solution defined by the claims. For example, to enlarge the image, additional focusing elements and semitransparent or fully transparent mirrors may be placed.

Claims (33)

In an optical beam splitter comprising transparent planar plates 6,7: 11,12 starting at a common intersection 4 of light reflecting surfaces branching towards the light beam to be distributed, The planar parallel plates 6,7: 11,12 starting at the common intersection 4 and adjacent to and perpendicular to the sides of the planar parallel plates 6,7: 11,12 having the light reflecting surface; The cross sections 6b and 7b of ADD'A 'and ABB'A' are at right angles with their associated sides 6a and 7a and AJKA 'and ALMA', and have a plane and an optical plane, At least one transparent body (10; 13,14), made of a transparent material, has a translucent reflecting surface or a planar parallel plate having a surface (10a, 10b; DPQD ', BNOB') composed of a semi-transparent reflecting portion and a total reflecting portion ( 6,7: 11,12 and its faces 10a, 10b; DPQD ', BNOB' are in the plane of the cross-sections 6b, 7b; ADD'A ', ABB'A'. 6b, 7b; ADD'A ', ABB'A'). The method of claim 1, The optical beam splitter is continuous in the first and second planar parallel plates 11, 12 with a light reflecting surface AJKA '; ALMA' branched towards the light beam to be distributed, the first and second as transparent bodies And third and fourth planar parallel plates 13 and 14 in contact with the two planar parallel plates. The planar parallel plates 11, 12, 13 and 14 are all made of the same material, having the same thickness v and the same refractive index n, and are of the oblate parallelepiped shape and parallel edges to each other. (15a-15b; AA''BB ', CC', DD '), and an optical beam splitter characterized in that it forms an X-shaped unit in a cross section perpendicular to the joined edge. The method of claim 2, a) a side 11a (AA'KJ) of the first planar parallel plate 11 facing the adjacent second planar parallel plate 12 and a side 11a 'opposite thereto, preferably, The width measured from the edges 15c and 15d associated with the four flat parallel plates 14, A phosphorus portion 11a "(DEE'D ') (where v is the thickness of the planar plate and n is the refractive index of the material), A side plane 12a (ALMA ') of the second plane parallel plate 12 facing the first plane parallel plate 11 and a side plane 12a' opposite thereto, preferably a third plane parallel plate A portion 12a "; BGG'B 'having a width s according to the above formula measured from the corners 15e, 15f; BB' combined with (13), Adjacent said, except for the portion 13a "; BHH'B 'measured from the corners 15e, 15f; BB' coupled with said second planar plate 12 and having a width s according to said equation; Side surfaces 13a (BNOB ') of the third planar parallel plate 13 facing the second planar parallel plate, Adjacent said, except for the portion 14a "; DFF'D ', measured from the edges 15c, 15d; DD' coupled with said first planar plate 11 and having a width s according to said equation; The side surface 14a (DPQD ') of the fourth planar parallel plate 14 facing the first planar parallel plate is a translucent reflective surface, b)-the edges of the side surfaces 13a (BNOB ') of the third planar parallel plate 13 facing the adjacent second planar parallel plate 12, preferably the corners joined with the second planar parallel plate 12. A portion 13a '(BHH'B') having a width s according to the above formula measured from (15a, 15b), An edge coupled to the first planar plate 11, preferably of the side surfaces 14a (DFF′D ′) of the fourth planar plate 14 facing the first planar plate 11 adjacent thereto. The portion 14a '; DFF'D', measured from (15c, 15d; DD ') and having a width s according to the above formula, is total reflection, c)-the end face 11b (ADD'A ') of the first planar parallel plate 11, opposite the end face 13b (CBB'C') of the third planar parallel plate 13, A cross section 12b (ABB'A ') of the second planar parallel plate 12 opposite the cross section 14b (CDD'C') of the fourth planar parallel plate 14 is an optical plane Optical beam splitter. The method according to any one of claims 1 to 3, The cross sections (6b, 7b; ADD'A ', ABB'A') whose outer surfaces are mercury plated. In an optical beam splitter comprising a transparent planar parallel plate starting at a common intersection 4 of light reflecting surfaces branching towards the light beam to be distributed, Four planar parallel plates 11, 12, 13 and 14, each having an thickness of 0.4 mm or less and forming an X-shaped unit in a cross section perpendicular to the intersection 4, wherein the adjacent planar parallel plates 11 , 12, 13, 14 are at an angle of 90 ° ± 20 ° to each other, wherein the reflecting surface is an optical layer that partially reflects and partially transmits natural or polarized light. In an optical beam splitter comprising a transparent planar parallel plate starting at a common intersection 4 of light reflecting surfaces branching towards the light beam to be distributed, Three planar parallel plates 11 ', 12', 13 'each having a thickness of 0.4 mm or less and forming an X-shaped unit 22 in a cross section perpendicular to the intersection 4, Here, the two planar parallel plates 11 'and 13' shorter than the third planar parallel plates 12 'abut on the center portion in the plane of the third planar parallel plate, and are continuous with each other on each side of the thin third plate. And the angles between the long flat parallel plates 12 'and the short flat parallel plates 11' and 13 'in the unit 22 are 90 ° ± 20 ° with respect to each other, respectively. The plates 11 ′, 12 ′, 13 ′ are either translucent mirrors or polarizers, which completely transmit optical elements polarized in one direction and partially polarize and partially reflect the optical elements polarized in the other direction. Optical beam splitter. In a binocular image display apparatus having an optical beam splitter and further a first focusing element 24 and an alternative mirror 25, The optical beam splitter is an optical beam splitter according to any one of claims 1 to 6, wherein the optical beam splitter is viewed in the direction of the beam reaching the translucent reflective surface of the optical beam splitter, i.e. in the receiving direction (5). Two first focusing elements are located on two opposing sides of the first focusing element 24, the common optical axis of the first focusing element 24 is perpendicular to the receiving direction 5, and the first focusing element 24 The alternative mirror 25 is located on both sides of the outer side, and the reflecting surface forms a 45 ° ± 15 ° angle δ with the optical axis, and the intersection of the plane of the reflecting surface of the alternative mirror 25 is the light. A binocular image display device characterized in that it is parallel or perpendicular to a mirror-crossing intersection (4) of a semi-transparent reflective surface of a beam splitter (22). The method of claim 7, wherein The optical beam splitter 22, the first focusing element 24 and the alternative mirror 25 are in front of the alternative mirror 25 and on the receiving side of the optical beam splitter 22 a light receiving opening 28a. A binocular image display apparatus characterized by being encased in a cover (28) including a; The method of claim 7, wherein The optical beam splitter 22 and the first focusing element 24 are fitted in a housing 30 covered with a cover plate 43 and having a light receiving opening in the first focusing element, The alternative mirror 25 is attached to a first slider 37 and a second slider 38 having a stem protruding into the housing 30, which is a toothed rack 40, wherein the first slider 37 and The second slider 38 is parallel to each other, between which the cogwheel 39 is connected, which is connected to the first and second sliders 37 and 38 to move in opposite directions to each other. Image display device. The method according to any one of claims 7 to 9, A binocular image display apparatus comprising an object source. The method of claim 10, And said object source is a screen (49a) of a microdisplay (49). The method of claim 11, The plane of the screen 49a of the microdisplay 49 is parallel to the plane defined by the mirror-crossing intersection 4 and its optical axis 23 and is disposed on the receiving side of the optical beam splitter 22. A binocular image display device. The method of claim 12, And at least one light source that illuminates the screen (49a) of the microdisplay (49), such as an LED (95). The method according to claim 12 or 13, In front of the screen 49a of the microdisplay 49, reflection or focusing is arranged on the other side of the distributor 22 and projecting a light beam of a light source, preferably LED 95, onto the screen 49a. A binocular visual display device characterized by the presence of an element (94). The method of claim 12, And a light source illuminating through the microdisplay unit (49) from the rear, and disposed between the microdisplay unit (49) and the device case (51). The method according to any one of claims 12 to 15, Binocular image display device according to claim 2, characterized in that on both sides of the optical beam splitter (22) there is a liquid crystal shutter (69) perpendicular to the axis of the first focusing element (24). The method according to any one of claims 12 to 16, And two clip plates (60) manufactured integrally with the device case (51). The method according to any one of claims 12 to 16, On the side of the device case 51, adjacent to the user's head of the device, there are two hook rails 53, which are manufactured integrally with the device case 51 and whose generation portions are parallel to each other. Binocular image display device. The method according to any one of claims 12 to 16, The device comprises a clip adapter (58) mounted between the hook rails (53). The method of claim 19, The clip adapter 58 is equal to the spacing between the bending plate 59, the two clip plates 60, and the hook rails 53, which extend from the device case 51 to the bent portion of the dent 52. A binocular image display apparatus, comprising: an elastic wing plate (61) having a full width. The method according to any one of claims 18 to 20, Two spectacle side arms 71, a bridge 73 connected to the connecting structure 72 and attached to the connecting structure 72, a co-support arm 74 attached to the bridge 73, and A binocular image display apparatus comprising a co-support pad (75) attached to an end of the co-support arm (74) and a bearing frame (70) composed of device fixing parts. The method of claim 21, The bridge (73) is a narrow plate having an upper surface coinciding with or parallel to a plane developed on the spectacle side arm (71), the maximum thickness (s) of which is 1.7 mm. The method of claim 21 or 22, The nose support portions are two nose support arms 74 which face downward and are parallel to each other and are provided at equal intervals from the center of the bridge 73 and two nose supports which are respectively attached to ends of the nose support arms 74. Consisting of a pad 75, And said device fixing part is comprised of two U-shaped fixed rails (76), which face downward and are parallel to each other and are installed at equal intervals from the center of said bridge (73). The method according to any one of claims 7 to 23, And at least one micro display driving circuit (77) and / or a high frequency transmission / reception circuit (78) and / or a power source (79) and / or a microprocessor (80). The method according to any one of claims 7 to 24, On one end of the case 51, there is a CCD image recording chip 81 that reacts with the infrared region, On the other end, the front lens 82 is disposed so that the third optical axis of the front lens 82 is perpendicular to the detection surface 84 of the CCD image recording chip 81, On the alternative mirror 25 of the right eye 27, a reflecting element 85 reflecting in the infrared region and allowing light in the visible wavelength region is an optical path between the right eye 27 and the detection surface 84. A binocular image display device, characterized in that disposed in. The method of claim 25, Above the front lens (82) there is an infrared LED (78), the light of which is guided toward the reflective element (74). The method according to any one of claims 7 to 24, The optical axis 23 of the first focusing element 24 and the mirror-crossing intersection 4 on the dent 52 formed in the device case 51 so as to fit the nose at the top of the device case 51. There is a CCD image recording chip 90 having a detection surface 93 on a plane parallel to the plane defined in Fig. And a second front lens (91) having a fourth optical axis (92) perpendicular to the detection surface (93) above the microdisplay unit (49). A binocular image display device comprising an alternative mirror 25a, a microdisplay 49b disposed between the alternative mirror 25a, a beam splitter 22a, a focus forming element 24a, a display housing and a bridge of a noise clip. To A binocular image display device, comprising: a flexible support loop 105, longer at the nose height than a circumference of the wearer's head. The method of claim 28, The support loop 105 is a binocular image display device, characterized in that formed as an electric cable in the entire portion. The method of claim 29, And said support loop (105) comprises two earphones (106). The method of claim 30, And said display housing (56a) comprises a microphone (108). The method of any one of claims 29 to 31, And said support loop (105) comprises a control unit (107). 33. The method of claim 32, The control unit 107 or the display housing 56a, A binocular image display apparatus comprising any one of a microdisplay driving electronics, a high frequency transmitting and receiving circuit, a digital television receiving circuit, a microprocessor and a power source.