CN211123528U - Tunable one-way perspective device - Google Patents

Abstract

The utility model belongs to the technical field of the unidirectional perspective is used, a can harmonious unidirectional perspective device is related to. The anti-reflection film comprises an anti-reflection film, a first polaroid, a transparent magneto-optical material, a second polaroid and a metal wire grid polaroid which are sequentially combined, wherein a coil used for adjusting the change of the current magnitude is wound on the transparent magneto-optical material, and the polarization direction of P light transmitted by the metal wire grid polaroid is consistent with the transmission axis directions of the first polaroid and the second polaroid. The side of the antireflection film on the observer side is used as the observer side, the side of the metal wire grid polarizer is used as the observed side, and the function of the antireflection film on the observer side is weakened or the reflection of light on the observer side is avoided, so that the light transmitted from the observed side is dominant in the eyes of the observer, and the situation of the observed side is easier to see. The device is in the one-way perspective field, receives the ambient light restraint less, has more the universality, and the one-way perspective effect is better.

Description

Tunable one-way perspective device

Technical Field

The utility model belongs to the technical field of the unidirectional perspective is used, a can harmonious unidirectional perspective device is related to.

Background

The one-way perspective glass is generally realized by two modes, one mode is that the film coating treatment is directly carried out on the glass, and the film has the functions of reflection and transmission; the other is to prepare the one-way perspective film firstly and then attach the one-way perspective film to the glass to realize the one-way perspective of the glass, the film has high operability, the price of the produced one-way perspective film is relatively lower, and the glass is processed by attaching the film, so that the film can be basically suitable for the glass with most shapes.

The existing one-way perspective device has a relatively common one-way perspective effect, and requires that the side of an observed person is not observed to have strong light as much as possible and the side of the observed person has no light as much as possible, so that the one-way perspective effect is poor when the light at the two sides is close to each other.

In the prior art, a very thin reflection coating, namely a semi-silvered surface, is arranged on a single-sided perspective mirror. This is called "half-silvered" because the glass is very sparsely covered with reflective molecules, and only half the number of molecules required to make an opaque mirror are used to make this single-sided see-through mirror. On a molecular level, the reflective molecules are uniformly dispersed on the surface of the lens to form a uniform film, but only half of the area of the lens is covered by the film. The half-silvered surface can reflect about half of the light reaching its surface, while the other half of the light is transmitted directly.

The main problems are as follows: the prior device for realizing the one-way perspective function mainly utilizes a semi-permeable membrane technology to lead the illumination intensity of the environments at two sides to be different, if the bright side is an A side (observed side), and the other side is a dark side (observed side), a large amount of light at the A side is reflected back from the surface, if the light intensity is Ir, because the B side is darker, only a little light can be transmitted to the A side, if the light intensity is It, when the reflected light intensity reaches more than 1.5 times of the light intensity transmitted from the dark side, and Ir/It is more than 1.5, the B side can not be seen at A; on the B side, the intensity of light transmitted from the a side to the B side is large, and the B side is dark, so the a side can be seen on the B side. From the main working principle of the current one-way perspective technology, the one-way perspective effect becomes poor when the light rays on two sides approach, the side A can be seen clearly, and the side B can be seen clearly. To obtain a better one-way perspective function, one side of two sides of the one-way perspective device is required to be brighter, and the other side of the one-way perspective device is required to be darker, otherwise, the effect is poor.

Disclosure of Invention

The utility model discloses both sides to traditional one-way perspective device need one side brighter, and the opposite side is darker, can not carry out self-adaptation tuning control according to the light intensity size to the problem of the effect that realizes better one-way perspective provides a neotype one-way perspective device that can tune.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the magneto-optical effect is a phenomenon in which the electromagnetic properties (e.g., permeability) of a substance are changed by a magnetic field, and the transmission properties (e.g., polarization state and transmission direction) of light inside the substance are also changed.

The utility model discloses thereby design one-way perspective device that can tune with magneto-optical effect principle practical application, including the antireflective coating, first polaroid, transparent magneto-optical material, second polaroid and the metal wire grating polaroid that form that make up in proper order, the winding is used for adjusting the coil that the electric current size changed on the transparent magneto-optical material, the polarization direction that the metal wire grating polaroid sees through P light is unanimous with first polaroid and second polaroid printing opacity axle direction. The metal wire grid acts as a reflecting layer on the one hand in the action of the device, and the transmitted light is linearly polarized light, which is twice as high as the transmittance when the device adopts a transflective film.

Preferably, the metal wire grid polarizer is replaced by a brightness enhancement film in an APCF polarizer, and the polarization direction of P light transmitted by the brightness enhancement film polarizer is consistent with the transmission axis direction of the first polarizer and the second polarizer.

Preferably, the metal wire grid layer and the second polarizer are combined to form a composite film.

Preferably, a transparent substrate may be disposed between the metal wire grid polarizer layer and the second polarizer, and the metal wire grid polarizer layer is fixed on the transparent substrate.

Preferably, the current in the coil changes the polarization direction of the polarized light by the magneto-optical effect, controls the transmittance of the light, reduces the transmission of the light from the observer side to the observer side, and makes the ratio of the intensity of the reflected light from the observer side to the intensity of the light transmitted from the observer side greater than 1.5.

The utility model discloses well metal wire grating polaroid adopts nanometer impression technique and physics vapor deposition method to form metal wire grating polaroid, perhaps adopts the metal wire grating polaroid that traditional etching method made, and silvering, aluminium, data plate, TiO can be selected to the metal level₂The thickness of the magneto-optical material can be optimized according to the requirement of a rotation angle theta and a magnetic induction B, Verdet constant, the thickness of the magneto-optical material is generally several to several tens of millimeters, and the magneto-optical material generally has garnet, magnetic photonic crystals and the like doped with various rare earth elements, such as paramagnetic glass material MR 3-2.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the side of the antireflection film on the observer side is used as the observer side, the side of the metal wire grid polarizer is used as the observed side, and the function of the antireflection film on the observer side is weakened or the reflection of light on the observer side is avoided, so that the light transmitted from the observed side is dominant in the eyes of the observer, and the situation of the observed side is easier to see.

2. The device is in the one-way perspective field, receives the ambient light restraint less, has more the universality, and the one-way perspective effect is better.

Drawings

Fig. 1 is a schematic diagram of the working principle of a metal wire grid polarizer, fig. 2 is a schematic diagram of the magneto-optical effect principle, and fig. 3 is a schematic diagram of the tunable one-way perspective device structure.

The figures are numbered: 1. an antireflection film, 2, a first polarizer, 3, a transparent magneto-optical material, 4, a second polarizer, 5, a metal wire grid polarizer and 6 coils.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment 1 this embodiment provides a tunable see-through one-way device, as shown in fig. 3. The film comprises an anti-reflection film 1, a first polarizer 2, a transparent magneto-optical material 3, a coil 6, a second polarizer 4 and a metal wire grid polarizer 5 (which can also be replaced by a brightness enhancement film in an APCF (advanced photo-electric compact film) which are arranged in sequence, and the film layers are combined in sequence according to the traditional process.

The working principle of the metal wire grid polarizer 5 is as follows: a metal wire-grid polarizer can selectively transmit TM polarized light components (polarization direction perpendicular to the wire grid direction, i.e., p light) and reflect TE polarized light components (polarization direction parallel to the wire grid direction, i.e., s light), as shown in fig. 1.

When a linearly polarized light beam (injected light) passes through a magneto-optical material in a magnetic field in a direction parallel to magnetic lines of force, the polarization plane of the output light is deflected, and the rotation angle θ is as shown in fig. 2. Verdet (Verdet) deeply studies on the faraday effect, and verifies that the rotation angle θ is in direct proportion to the magnetic induction intensity B and the length L of the light passing through the magneto-optical material, that is, θ = VB L, V is a Verdet constant and a constant related to the property of the substance and the frequency of the light.

The requirements of the device in this example:

1. the metal wire grid polarizer 5 (which may be replaced by a brightness enhancement film in an APCF polarizer) mainly functions to reflect S-polarized light while transmitting P-polarized light. First, the manufacturing method can be combined with the second polarizer 4 to form a composite film, and the second polarizer can also be manufactured on a transparent substrate (such as glass, plastic, and the like), and the second polarizer 4 is arranged on the other side of the substrate.

2. The polarization direction of the P-ray transmitted by the metal wire grid polarizer 5 (which may be replaced by a brightness enhancement film in an APCF polarizer) is the same as the transmission axis direction of the second polarizer 4, and also the transmission axis direction of the first polarizer 2.

3. The antireflection film 1 side is an observer side, and the metal wire grid side is an observed person side, and the effect of the antireflection film 1 is weakened or the reflection of light on the observer side is avoided, so that the observer can more easily see the situation on the observed person side.

4. The polarization direction of polarized light can be changed by utilizing the magneto-optical effect through the change of the coil current, the transmittance of light can be controlled by utilizing the device, the light transmitted to the observed person side from the observer side is reduced, the ratio of the intensity of the reflected light from the observed person side to the intensity of the light transmitted from the observer side is larger than 1.5, and the requirement of one-way perspective is met.

5. The present one-way perspective device requires the light of the observed person to be stronger and the light of the observed person to be weaker, and the device requires the light of the observed person to be stronger, and the light of the observed person to be stronger or weaker.

The working principle is as follows:

the side of the antireflection film is used as the side of an observer, the side of the metal wire grid polarizer is used as the side of the observed person, and when the side is observed, the function of the antireflection film is weakened or the reflection of light on the side of the observed person is avoided, so that the light transmitted from the side of the observed person is dominant in the eyes of the observed person, and the condition of the side of the observed person is easier to see.

On the viewer side, the light is strong: when the light on the observer side is dark, the ratio of the intensity of the reflected light on the observer side to the intensity of the light transmitted from the observer side easily satisfies the condition; when the light on the observer side is strong, the polarization direction of the polarized light can be changed by utilizing the magneto-optical effect through controlling the change of the coil current, and the transmittance of the light on the observer side transmitted to the observer side can be controlled by utilizing the device, so that the ratio of the intensity of the reflected light on the observer side to the intensity of the light transmitted from the observer side can easily meet the condition.

The utility model discloses utilize metal wire grating polaroid 5 to realize half function of half reflection half transmitted light. The magneto-optical effect of the magneto-optical material 3 and the two polaroids are utilized to realize the adjustment of the light transmittance, so that the ratio of the intensity of the light reflected by the observed side to the intensity of the light transmitted from the observer side always meets the condition of one-way perspective. The second polarizer 4 is added to prevent the metal wire grid polarizer from reflecting light rays transmitted from one side of an observer to one side of the observed observer, so that the one-way perspective effect is improved.

The device is in the one-way perspective field, receives the ambient light restraint less, has more the universality, and the one-way perspective effect is better.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. The tunable one-way perspective device is characterized by comprising an anti-reflection antireflection film, a first polaroid, a transparent magneto-optical material, a second polaroid and a metal wire grid polaroid which are sequentially combined, wherein a coil used for adjusting the change of the current magnitude is wound on the transparent magneto-optical material, and the polarization direction of P light transmitted by the metal wire grid polaroid is consistent with the transmission axis directions of the first polaroid and the second polaroid.

2. The tunable one-way see-through device of claim 1, wherein the metal wire grid polarizer is replaced by a brightness enhancement film in an APCF polarizer, wherein the polarization direction of P-light transmitted by the brightness enhancement film polarizer is aligned with the transmission axis direction of the first polarizer and the second polarizer.

3. The tunable see-through device of claim 1 or 2, wherein the metal wire grid layer is combined with a second polarizer to form a composite film.

4. The tunable half mirror device according to claim 1 or 2, wherein a transparent substrate is disposed between the metal wire grid layer and the second polarizer, and the metal wire grid layer is fixed on the transparent substrate.

5. The tunable fluoroscopy apparatus of claim 1 or 2, wherein the current in the coil changes the polarization direction of the polarized light by using magneto-optical effect, controls the transmittance of the light, reduces the transmission of the light from the observer side to the observed side, and makes the ratio of the intensity of the reflected light from the observed side to the intensity of the light transmitted from the observer side greater than 1.5.

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