阅读说明：本技术 一种单向透光的光学结构 (A kind of optical texture of Unidirectional transparent ) 是由 鲍鹏飞 于 2019-09-29 设计创作，主要内容包括：本发明公开一种单向透光的光学结构,该光学结构包括依次放置的第一吸收型偏振片、具有旋光特性的光学元件、第二吸收型偏振片,第二吸收型偏振片与第一吸收型偏振片的透光方向摆放角度相差45°,所述的具有旋光特性的光学元件将线性偏振光顺时针或逆时针旋转45°。本发明通过光学偏振态的改变,实现反向光路的截止,从而达到单向透光的功能。该结构体积小巧,适用于许多对体积有要求的场合,变相减小了激光器或要求单向透光的结构的体积和重量。(The present invention discloses a kind of optical texture of Unidirectional transparent, the optical texture includes the first absorption-type polarizing film, the optical element with optically-active characteristic, the second absorption-type polarizing film being sequentially placed, second absorption-type polarizing film differs 45 ° with the light transmission direction placement angle of the first absorption-type polarizing film, and the optical element with optically-active characteristic is by 45 ° clockwise or counterclockwise of linearly polarized photon.The present invention realizes the cut-off of reverse optical path by the change of optical polarization, to reach the function of Unidirectional transparent.The structural volume is small and exquisite, suitable for many occasions required to volume, in a disguised form reduces laser or requires the volume and weight of the structure of Unidirectional transparent.)

1. a kind of optical texture of Unidirectional transparent, which is characterized in that the optical texture includes being arranged successively the first of arrangement to absorb Type polarizing film (1), the optical element (2) with optically-active characteristic, the second absorption-type polarizing film (3), when the light with optically-active characteristic When learning 45 ° of dextrorotation of element (2) selection, the light transmission direction of the second absorption-type polarizing film (3) and the first absorption-type polarizing film (1) is in inverse 45 ° of hour hands are put；When the optical element (2) with optically-active characteristic selects left-handed 45 °, the second absorption-type polarizing film (3) and the It is put in 45 ° clockwise in the light transmission direction of one absorption-type polarizing film (1).

2. the optical texture of Unidirectional transparent according to claim 1, which is characterized in that the light with optically-active characteristic Element (2) are learned as LCD made of optically-active film, chiral polymer material, quartzy optical rotation plate etc..

3. the optical texture of Unidirectional transparent according to claim 1, which is characterized in that the first absorption-type polarizing film (1), optical element (2), the second absorption-type polarizing film (3) three with optically-active characteristic are composite film, and pass through gluing Form the optical texture of Unidirectional transparent.

4. the optical texture of Unidirectional transparent according to claim 1, which is characterized in that the first absorption-type polarizing film (1) and the second absorption-type polarizing film (3) is P light polarization plate or S light polarization plate.

5. a kind of laser of the optical texture of the Unidirectional transparent including above-mentioned any one claim.

Technical field

The present invention relates to optical fields, and in particular to a kind of optical texture of Unidirectional transparent.

Background technique

With the rapid development in epoch, each components of optical device all develop towards miniaturization and lightweight, people Requirement to Unidirectional transparent structure is also such.Nowadays Faraday polarization apparatus is mainly used using more optoisolator on the market And faraday isolator, disadvantage are that volume and weight is larger and effective aperture is smaller, are unable to satisfy the demand of people.

Summary of the invention

For existing Unidirectional transparent structure volume and weight is big, technical problem that effective aperture is small, the present invention provides A kind of optical texture of Unidirectional transparent realizes the cut-off of reverse optical path by the change of optical polarization, to reach unidirectional saturating The function of light, the structural volume are small, light-weight.

The purpose of the present invention is realized by the following technical solutions:

A kind of optical texture of Unidirectional transparent, which is characterized in that the optical texture includes being arranged successively the first of arrangement to inhale Receipts type polarizing film, the optical element with optically-active characteristic, the second absorption-type polarizing film, when the optical element choosing with optically-active characteristic When selecting 45 ° of dextrorotation, the light transmission direction of the second absorption-type polarizing film and the first absorption-type polarizing film is put in 45 ° counterclockwise；Work as tool When thering is the optical element of optically-active characteristic to select left-handed 45 °, the light transmission side of the second absorption-type polarizing film and the first absorption-type polarizing film It is put in 45 ° clockwise.

Further, the optical element with optically-active characteristic is optically-active film, made of chiral polymer material LCD, quartzy optical rotation plate etc..

Further, the first absorption-type polarizing film, the optical element with optically-active characteristic, the second absorption-type polarization Piece three is composite film, and passes through the glued optical texture for forming Unidirectional transparent.

Further, the first absorption-type polarizing film and the second absorption-type polarizing film are P light polarization plate or S light polarization Piece.

A kind of laser of the optical texture of the Unidirectional transparent including above-mentioned any one.

Beneficial effects of the present invention are as follows:

The present invention realizes the cut-off of reverse optical path by the change of optical polarization, thus reach the function of Unidirectional transparent, The structural volume is small and exquisite, suitable for many occasions required to volume, in a disguised form reduces laser or requires Unidirectional transparent The volume and weight of structure.

Detailed description of the invention

Fig. 1 is one light path schematic diagram of embodiment of the optical texture of Unidirectional transparent of the invention；

Fig. 2 is two light path schematic diagram of embodiment of the optical texture of Unidirectional transparent of the invention；

Fig. 3 is three light path schematic diagram of embodiment of the optical texture of Unidirectional transparent of the invention.

In figure, the first absorption-type polarizing film 1, the optical element 2 with optically-active characteristic, the second absorption-type polarizing film 3, first Light source 4, second light source 5.

Specific embodiment

Below according to attached drawing and preferred embodiment the present invention is described in detail, the objects and effects of the present invention will become brighter It is white.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.

The optical texture of Unidirectional transparent of the invention include be arranged successively from left side to right side arrangement the first absorption-type it is inclined Shake piece 1, the optical element 2 with optically-active characteristic and the second absorption-type polarizing film 3, the light transmission direction of the second absorption-type polarizing film 3 45 ° are differed with the placement angle in the light transmission direction of the first absorption-type polarizing film 1, the optical element 2 with optically-active characteristic By 45 ° clockwise or counterclockwise of linearly polarized photon.

The optical element 2 with optically-active characteristic is optically-active film, LCD made of chiral polymer material, quartz revolve Mating plate etc..First absorption-type polarizing film 1 and the second absorption-type polarizing film 3 are P light polarization plate or S light polarization plate.

The queueing discipline of three optical elements is: when the optical element 2 with optically-active characteristic selects 45 ° of dextrorotation, the It is put in 45 ° counterclockwise in the light transmission direction of two absorption-type polarizing films 3 and the first absorption-type polarizing film 1；When with optically-active characteristic When optical element 2 selects left-handed 45 °, the light transmission direction of the second absorption-type polarizing film 3 and the first absorption-type polarizing film 1 is in clockwise 45 ° are put.It should be noted that any structure for meeting above-mentioned placement regulation all should be within the scope of the present invention.

It is as shown in Figure 1 an embodiment light path schematic diagram of the optical texture of Unidirectional transparent of the invention.First inhales in Fig. 1 Receipts type polarizing film 1 and the second absorption-type polarizing film 3 are the absorption-type P light polarization plate of 45 ° of light transmission angular separation, have optically-active characteristic Optical element 2 be 45 ° of dextrorotation of optical rotation plate.It is natural light when first light source 4 enters to the right system from left side, is inhaled by first Receipts type polarizing film 1 becomes the polarised light (i.e. P light) of the first linear polarization direction, rotates clockwise 45 ° by optical rotation plate 2 afterwards and becomes The polarised light (with the first linear polarization direction in 45 ° of deflections) of second linear polarization direction, and reach the second absorption-type polarizing film 3 (light transmission direction is the second linear polarization direction).Because polarization direction is identical as polarizing film light transmission direction, light is gone out with low-loss It penetrates, i.e. direction light-permeable.

Other direction is natural light when second light source 5 enters system from right side to the left, by the second absorption-type polarizing film 3 Become the polarised light of the second linear polarization direction, rotating clockwise 45 ° by optical rotation plate 2 afterwards becomes third linear polarization direction Polarised light (vertical with the first linear polarization direction), and reach the first absorption-type polarizing film 1.Because polarization direction is absorbed with first The light transmission direction of type polarizing film 1 is mutually perpendicular to, and light is largely absorbed by the polarizing film, i.e., the direction can not light transmission.

It is above to realize transmissive from left to right and from right to left lighttight Unidirectional transparent function, play reverse isolation Effect.

Alternatively embodiment, two index path of specific embodiment are as shown in Figure 2.First absorption-type polarizing film 1 in Fig. 2 It is the absorption-type P light polarization plate of 45 ° of light transmission angular separation, the optical element 2 with optically-active characteristic with the second absorption-type polarizing film 3 For left-handed 45 ° of optical rotation plate.It is natural light when first light source 4 enters to the right system from left side, by the first absorption-type polarizing film 1 Become the polarised light (i.e. P light) of the first linear polarization direction, 45 ° of rotation becomes second linearly partially counterclockwise by optical rotation plate 2 afterwards The polarised light (with the first linear polarization direction in 45 ° of deflections) in vibration direction, and reach 3 (light transmission direction of the second absorption-type polarizing film For the second linear polarization direction).Because polarization direction is identical as polarizing film light transmission direction, light is emitted with low-loss, i.e. the party To light-permeable.

Other direction is natural light when second light source 5 enters system from right side to the left, by the second absorption-type polarizing film 3 Become the polarised light of the second linear polarization direction, 45 ° of rotation becomes third linear polarization direction counterclockwise by optical rotation plate 2 afterwards Polarised light (vertical with the first linear polarization direction), and reach the first absorption-type polarizing film 1.Because polarization direction is absorbed with first The light transmission direction of type polarizing film 1 is mutually perpendicular to, and light is largely absorbed by the polarizing film, i.e., the direction can not light transmission.

Three light path schematic diagram of embodiment of the optical texture of Unidirectional transparent of the invention is as shown in figure 3, the first absorption in Fig. 3 Type polarizing film 1 and the second absorption-type polarizing film 3 are the absorption-type S light polarization plate of 45 ° of light transmission angular separation, with optically-active characteristic The optical rotation plate that optical element 2 is 45 ° of dextrorotation.It is natural light when first light source 4 enters to the right system from left side, is absorbed by first Type polarizing film 1 becomes the polarised light (i.e. S light) of the first linear polarization direction, rotates clockwise 45 ° by optical rotation plate 2 afterwards and becomes the The polarised light (with the first linear polarization direction in 45 ° of deflections) of bilinear polarization direction, and reach the second absorption-type polarizing film 3 (light transmission direction is the second linear polarization direction).Because polarization direction is identical as polarizing film light transmission direction, light is gone out with low-loss It penetrates, i.e. direction light-permeable.

Other direction is natural light when second light source 5 enters system from right side to the left, by the second absorption-type polarizing film 3 Become the polarised light of the second linear polarization direction, rotating clockwise 45 ° by optical rotation plate 2 afterwards becomes third linear polarization direction Polarised light (vertical with the first linear polarization direction), and reach the first absorption-type polarizing film 1.Because polarization direction is absorbed with first The light transmission direction of type polarizing film 1 is mutually perpendicular to, and light is largely absorbed by the polarizing film, i.e., the direction can not light transmission.

It should be noted that the present invention includes but are not limited to above-described embodiment, wherein the first absorption-type polarizing film 1 and Two absorption-type polarizing films 2 are P light polarization plate or S light polarization plate when not seeking common ground, and can be P light polarization plate and S light polarization plate Combination.

Present invention could apply to the reverse isolations of laser, but include not only the reverse isolation of laser, further include The structure and occasion of various requirement Unidirectional transparent.Because of the particularity of laser works mode, many lasers need to add anti- To isolator, after preventing the laser reflection after plane, backtracking laser, and generation is repeatedly turned back and energy stacking, The structures such as crystal inside are damaged.

In practical application, 1,2,3 three structure in Fig. 1 exists in the form of gluing etc., constitutes an integral member.It can be with It is directly applied to the transmitting terminal of laser, prevents reversed laser from entering laser, damages.First light source 4 in Fig. 1 It is considered as the transmitting terminal of laser, and second light source 5 can be considered the stray light because of backtrackings such as reflection or diffusing reflections.With the structure It can be very good to allow laser emitting with the principle and reduce energy loss.Meanwhile the light of return is absorbed by the structure, preferably Protect the emission source of laser.

It will appreciated by the skilled person that being not used to limit the foregoing is merely the preferred embodiment of invention System invention, although invention is described in detail referring to previous examples, for those skilled in the art, still It can modify to the technical solution of aforementioned each case history or equivalent replacement of some of the technical features.It is all Within the spirit and principle of invention, modification, equivalent replacement for being made etc. be should be included within the protection scope of invention.