CN100498878C - False proof trademark by sub-wavelength grating guided mode resonance and method for making same - Google Patents

Abstract

A sub-wavelength grating guide-modular anti-false registered trademark is composed of trademark base plate, ordinary patterns, registered unit names, anti-false regions and a light-absorption self-adhesive layer coated characterizing that under the base plate patterns, words or letters with anti-false function visible in special directions are formed by several pressed, one way sub-wave-length gratings in different lengths. Monochrome bright anti-false patterns, words or letters can be seen from the due front of the trademark since sub-wave length grating generates modular resonance related to multiple factors of its material index of refraction, its grating period and its height.

Description

Sub-wave length grating guide mode resonance anti-false trademark and preparation method thereof

Technical field

The present invention relates to a kind of sub-wave length grating guide mode resonance anti-false trademark and preparation method thereof, belong to the trade mark anti-fake technique field.

Background technology

Change market economy in China over to from planned economy, and incorporate the global economy high-speed developing period, the commodity production development is exceedingly fast, and product is a feast for the eyes, and new product also constantly occurs, although the registered trademark system is set up, but imitative branded goods remains incessant after repeated prohibition, and hinders and influenced market economy standardization development, presses for that strong measures should be taken against fraudulent goods, also press for simultaneously the development anti-false trademark, with standard commodity economy and commodity market development.At present existing antiforge laser holographic registered trademark, code anti-fake registered trademark and diffraction grating anti-false trademark or the like, these false proof registered trademark physical principles are simple, easy to make, cost is lower, is beneficial to wide popularization and application, and this is its advantage, these advantages just, brought easy quilt to copy, the shortcoming of ineffective security makes anti-false trademark not play real anti-fake effect.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome above-mentioned the deficiencies in the prior art, false proof registered trademark of a kind of sub-wave length grating guide mode resonance and preparation method thereof is provided, this method and technology principle complexity, but production technology is simple relatively, difficult quilt is copied, and antifalse effect is fabulous.

Technical solution of the present invention is: the false proof registered trademark of a kind of sub-wave length grating guide mode resonance, by the registered trademark substrate, common registered trademark figure, trade mark registration organization and false proof zone, and be coated in extinction non-drying glue layer below the trade mark substrate, its characteristics are: in false proof zone, have in the specific direction scope visual see have anti-fraud functional monochrome graphics or a word, letter, these figures or word, letter all is to some sub-wave length gratings different in size by the folk prescription of suppressing, described grating and substrate are the same material layer, under the TE polarizing light irradiation, grating region has produced guide mode resonance, sends high brightness monochromatic light.

The described grating of on the registered trademark substrate, suppressing, its cycle is t, the t value is 0.25-0.55 μ m, and the material refractive index n of substrate _g, grating layer equivalent refractive index n _e, incident angle θ, optical wavelength λ, grating height h ₁Underlayer thickness h with substrate ₂Following relation is arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate _gValue is 1.100-1.800, the equivalent refractive index n of grating layer _eValue is 1.200-1.600, and incident angle θ value is ± 15 °, and optical wavelength λ value is 0.405-0.700 μ m, grating height h ₁Value is 0.15-0.30 μ m, the underlayer thickness h of substrate ₂Value is 0.01-0.20 μ m.Under the white light that the TE polarization is arranged, sub-wave length grating has produced guide mode resonance, can observe the very bright red or fabulous false proof letter of green monochromatic antifalse effect in ° scope of dead ahead ± 15 of registered trademark.

The described grating of on the registered trademark substrate, suppressing, its cycle is t ', t ' is worth the m for 0.20-0.75 μ, at the transparent plastic sheeting of grating upper surface lid layer of compacting, and the material refractive index n of substrate _s, grating layer equivalent refractive index n _e, the plastic sheeting refractive index n _g, incident angle θ, optical wavelength λ ', plastic sheeting height h ₁', grating thickness h ₂' and the bottom height h of substrate ₃' following relation arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\&prime;=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00123.png"\; state="\{\{state\}\}">h</figure-callout>}}_3\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_s^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate _sValue is 1.200-2.000, the equivalent refractive index n of grating layer _eValue is 1.200-1.800, plastic sheeting refractive index n _gValue is 1.200-2.000, and incident angle θ value is ± 15 °, and optical wavelength λ ' is worth the m for 0.25-0.70 μ, grating height h ₁' be worth the m for 0.01-0.200 μ, the underlayer thickness h of substrate ₂' be worth the m for 0.05-0.30 μ, plastic sheeting height h ₃' be worth m for 0.10-0.40 μ.Under the white light that the TE polarization is arranged, sub-wave length grating has produced guide mode resonance, can see through overlayer and observe the very bright red or fabulous false proof letter of green monochromatic antifalse effect in ° scope of dead ahead ± 15 of registered trademark.

Make the method for above-mentioned sub-wave length grating guide mode resonance anti-false trademark, its feature also is: the alphabetical method for making and the step of grating belt is in the false proof zone, the first step is with conventional ultra tiny photoetching and lithographic method and technology, produces the mould identical with design size on steel or copper, quartz material; Second step was produced the letter of being made up of grating in the false proof zone on substrate more again with roll extrusion or drawing method and technology; The 3rd step covered the plastic sheeting of layer of transparent on the grating surface of compacting.

The present invention compared with prior art has the following advantages:

When using this sub-wave length grating guide mode resonance anti-false trademark, although its production technology is simple relatively, easy to make, cost is also lower, but because its designing technique principle complexity, and relevant with a plurality of factors, be determined in case make parameter, just being difficult for being copied, is a kind of fabulous false proof registered trademark of widespread use antifalse effect that is beneficial to therefore.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 has antiforge function regional area structure enlarged drawing among Fig. 1;

Fig. 3 is a kind of structure enlarged drawing of a local detail I word AA section in Fig. 2 antiforge function zone;

Fig. 4 is the false proof regional structure enlarged drawing of a kind of embodiment of Fig. 3 cross-section structure principle;

Fig. 5 is the another kind of structure enlarged drawing of a local detail I word AA section in Fig. 2 antiforge function zone;

Fig. 6 is the false proof regional structure enlarged drawing of the another kind of embodiment of Fig. 5 cross-section structure principle.

Embodiment

As shown in Figure 1, sub-wave length grating guide mode resonance anti-false trademark of the present invention is by the translucent visual registered trademark substrate of seeing 1, common registered trademark figure 2, trade mark registration organization 3 and have antiforge function zone 4 and form, registered trademark substrate 1 is a translucent plastic sheeting, thickness is 0.02-0.5mm, size 5 * 5-30 * 30mm, it is shaped as rectangle or square, circular, oval, rhombus or polygon; Common registered trademark figure 2 is by the designed brand logo of registered trademark unit, with the method for printing with graphic printing to film, any direction and situation all are visually to see; Trade mark registration organization 3 is the full name or the abbreviation of trade mark registration unit, and is the same with brand logo 2, with the method for printing title is printed onto on the film, and any direction and situation all are visually to see; Except that the visual registered trademark figure of seeing 2 and trade mark registration organization 3, also to do to have and have only that the particular range direction is visual sees the false proof regional 4 of monochrome graphics or word, letter, figure in this zone or word and letter 5 have antiforge function.

As shown in Figure 2, for having antiforge function regional area 4 structure enlarged drawings among Fig. 1, be that alphabetical I5 has been carried out the structure amplification among the figure, the I word is to be made of to some sub-wave length gratings 6 different in size the folk prescription of suppressing as seen from Figure 2, gratings strips number and length is by the decision of letter or dimension of picture, and the gratings strips number equals letter or dimension of picture divided by grating cycle t.

As shown in Figure 3,, scribble one deck extinction adhesive sticker 7 for 1 time, can be used for pasting with product or product external packaging at visual registered trademark substrate for a kind of structure enlarged drawing of a local detail I word AA section in Fig. 2 antiforge function zone; The grating of compacting on the antiforge function zone 4 of registered trademark substrate 1, its cycle is t, and the material refractive index n of substrate 1 _g, grating layer equivalent refractive index n _e, incident angle θ, optical wavelength λ, grating height h ₁Underlayer thickness h with substrate 1 ₂Following relation is arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

Substrate 1 is under the TE rayed, can in ° scope of dead ahead ± 15 of registered trademark, observe very bright red or green or other monochromatic false proof letter, this is owing to inject the white light of TE polarization, produced guide mode resonance through sub-wave length grating, the luminous energy that one narrow wave band wherein arranged sees through the bottom of substrate 1 or is absorbed, luminous energy is lossless all to be reflected, thereby can see very bright red or green or other monochromatic false proof letter.

As shown in Figure 4, be the false proof regional structure enlarged drawing of a kind of embodiment of application drawing 3 cross-section structure principles of the present invention, scribble one deck extinction adhesive sticker 7 for 1 time at visual registered trademark substrate, can be used for pasting with product or product external packaging; On the pseudo-functional area 4 of registered trademark substrate 1, suppressed grating, the letter C ASIOE 5 that forms by grating be Chinese Academy of Sciences's photoelectricity English first letter, its grating cycle is t, the t value is 0.25-0.55 μ m, the alphabetical method for making and the step of this antiforge function zone grating belt are: the first step is with conventional ultra tiny photoetching and lithographic method and technology, produces the mould identical with design size on steel or copper, quartz material; Second step was being produced the letter of being made up of grating on the antiforge function zone 4 again with roll extrusion or drawing method and technology on the substrate 1.And the material refractive index n of substrate 1 _g, grating layer equivalent refractive index n _e, incident angle θ, optical wavelength λ, grating height h ₁Underlayer thickness h with substrate 1 ₂Following relation is arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate 1 _gValue is 1.100-1.800, the equivalent refractive index n of grating layer _eValue is 1.200-1.600, and incident angle θ value is ± 15 °, and optical wavelength λ value is 0.405-0.700 μ m, grating height h ₁Value is 0.15-0.30 μ m, the underlayer thickness h of substrate 1 ₂Value is 0.01-0.20 μ m.

Under the TE rayed, can in ° scope of dead ahead ± 15 of registered trademark, observe the very bright monochromatic false proof letter of wherein a kind of redness, this is owing to inject the white light of TE polarization, produced guide mode resonance through sub-wave length grating, the ruddiness that one narrow wave band wherein arranged sees through the bottom of substrate 1 or is absorbed, ruddiness is lossless all to be reflected, thereby can see very bright red monochromatic false proof letter.

As shown in Figure 5, be the another kind of structure enlarged drawing of a local detail I word AA section in Fig. 2 antiforge function zone, at the transparent plastic sheeting 8 of the upper surface lid layer in antiforge function zone 4, scribble one deck extinction adhesive sticker 7 for 1 time at visual registered trademark substrate, can be used for pasting with product or product external packaging.The grating of compacting on the antiforge function zone 4 of registered trademark substrate 1, its cycle is t ', and the material refractive index n of substrate 1 _s, grating layer equivalent refractive index n _e, plastic sheeting 8 refractive index ns _g, incident angle θ, grating height h ₁', the underlayer thickness h of optical wavelength λ ', substrate 1 ₂' and plastic sheeting height h ₃' following relation arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\&prime;=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_s^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00123.png"\; state="\{\{state\}\}">h</figure-callout>}}_3\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_g^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

Substrate 1 is under the TE rayed, can in ° scope of dead ahead ± 15 of registered trademark, observe very bright red or green or other monochromatic false proof letter, this is owing to inject the white light of TE polarization, produced guide mode resonance through sub-wave length grating, the luminous energy that one narrow wave band wherein arranged sees through the bottom of substrate 1 or is absorbed, luminous energy is lossless all to be reflected by plastic sheeting 8, thereby can see very bright red or green or other monochromatic false proof letter.

As shown in Figure 6, be the false proof regional structure enlarged drawing of another kind of embodiment of application drawing 5 cross-section structure principles of the present invention, scribble one deck extinction adhesive sticker 7 for 1 time at visual registered trademark substrate, can be used for pasting with product or product external packaging; On the antiforge function zone 4 of registered trademark substrate 1, suppressed grating, the letter C ASIOE 5 that forms by grating be Chinese Academy of Sciences's photoelectricity English first letter, its grating cycle is t ', t ' is worth the m for 0.20-0.75 μ, the upper surface plastic sheeting 8 that also lid layer is transparent in antiforge function zone 4.The alphabetical method for making and the step of this antiforge function zone grating belt are: the first step is with conventional ultra tiny photoetching and lithographic method and technology, produces the mould identical with design size on steel or copper, quartz material; Second step was being produced the letter of being made up of grating on the antiforge function zone 4 again with roll extrusion or drawing method and technology on the substrate 1; The 3rd goes on foot on the grating surface of compacting at the plastic sheeting 8 that covers layer of transparent.And the material refractive index n of substrate 1 _s, grating layer equivalent refractive index n _e, plastic sheeting 8 refractive index ns _g, incident angle θ, grating height h ₁', the underlayer thickness h of optical wavelength λ ', substrate 1 ₂' and plastic sheeting height h ₃' following relation arranged:

${\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00122.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\&prime;=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_s^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

${\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="C200310121489E00111.png,C200310121489E00123.png"\; state="\{\{state\}\}">h</figure-callout>}}_3\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_g^2-{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200310121489E00111.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate 1 _sValue is 1.200-2.000, the equivalent refractive index n of grating layer _eValue is 1.200-1.800, plastic sheeting refractive index n _gValue is 1.200-2.000, and incident angle θ value is ± 15 °, and optical wavelength λ ' is worth the m for 0.25-0.70 μ, grating height h ₁' be worth the m for 0.01-0.200 μ, the underlayer thickness h of substrate 1 ₂' be worth the m for 0.05-0.30 μ, plastic sheeting height h ₃' be worth m for 0.10-0.40 μ.Under the TE rayed, can in ° scope of dead ahead ± 15 of registered trademark, observe the very bright monochromatic false proof letter of wherein a kind of redness, this is owing to inject the white light of TE polarization, produced guide mode resonance through sub-wave length grating, the ruddiness that one narrow wave band wherein arranged sees through the bottom of substrate 1 or is absorbed, ruddiness is lossless all to be reflected by plastic sheeting 8, thereby can see very bright red monochromatic false proof letter.

Claims (7)

1, a kind of sub-wave length grating guide mode resonance anti-false trademark, by registered trademark substrate (1), common registered trademark figure (2), trade mark registration organization (3) and false proof zone (4), and the extinction non-drying glue layer (7) that is coated in below the trade mark substrate (1) is formed, it is characterized in that: have in false proof zone (4) in the specific direction scope visual see have anti-fraud functional monochrome graphics or word, a letter, these figures or word, letter all are that folk prescription by compacting is to some sub-wave length gratings (6) formation different in size; Described grating (6) is the same material layer with substrate (1), and under the TE polarizing light irradiation, grating region has produced guide mode resonance, sends high brightness monochromatic light.

2, sub-wave length grating guide mode resonance anti-false trademark according to claim 1, its feature also is: described grating (6) cycle of upward suppressing at registered trademark substrate (1) is 0.25-0.55 μ m, and the material refractive index n of substrate (1) _g, grating layer equivalent refractive index n _e, incident angle θ, optical wavelength λ, grating height h ₁And the underlayer thickness h of substrate (1) ₂Following relation is arranged:

$h_1=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_2=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate (1) wherein _gValue is 1.100-1.800, the equivalent refractive index n of grating layer _eValue is 1.200-1.600, and incident angle θ value is ± 15 °, and optical wavelength λ value is 0.405-0.700 μ m, grating height h ₁Value is 0.15-0.30 μ m, the underlayer thickness h of substrate (1) ₂Value is 0.01-0.20 μ m.

3, sub-wave length grating guide mode resonance anti-false trademark according to claim 1, its feature also is: described grating (6) periodic quantity of upward suppressing at registered trademark substrate (1) is 0.20-0.75 μ m, grating (6) upper surface in compacting also covers the plastic sheeting (8) of layer of transparent and the material refractive index n of substrate (1) _s, grating layer equivalent refractive index n _e, plastic sheeting (8) refractive index n _g, incident angle θ, optical wavelength λ ', grating height h ₁', the underlayer thickness h of substrate (1) ₂' and plastic sheeting (8) height h ₃' following relation arranged:

$h_1\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_e^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_2\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_s^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_3\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate (1) _sValue is 1.200-2.000, the equivalent refractive index n of grating layer _eValue is 1.200-1.800, plastic sheeting refractive index n _gValue is 1.200-2.000, and incident angle θ value is ± 15 °, and optical wavelength λ ' is worth the m for 0.25-0.70 μ, grating height h ₁' be worth the m for 0.01-0.200 μ, the underlayer thickness h of substrate (1) ₂' be worth the m for 0.05-0.30 μ, plastic sheeting height h ₃' be worth m for 0.10-0.40 μ.

4, a kind of method of making the described making sub-wave length grating of claim 1 guide mode resonance anti-false trademark is characterized in that comprising the following steps:

(1), on steel or copper, quartz material, produces the mould identical with design size with conventional ultra tiny photoetching and lithographic method and technology;

(2) again with roll extrusion or drawing method and technology, produce the letter of forming by grating (6) in the false proof zone (4) on substrate (1).

5, the method for making sub-wave length grating guide mode resonance anti-false trademark according to claim 4, its feature also are to comprise the following steps: to cover on the grating surface of compacting in step (2) back the plastic sheeting (8) of layer of transparent.

6, the method for making sub-wave length grating guide mode resonance anti-false trademark according to claim 4 is characterized in that: described grating periodic quantity is 0.25-0.55 μ m, and the material refractive index n of substrate (1) _g, grating layer equivalent refractive index n _e, incident angle θ, optical wavelength λ, grating height h ₁And the underlayer thickness h of substrate (1) ₂Following relation is arranged:

$h_1=\mathrm{\&lambda;}/\left(2\sqrt{n_e^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_2=\mathrm{\&lambda;}/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate (1) wherein _gValue is 1.100-1.800, the equivalent refractive index n of grating layer _eValue is 1.200-1.600, and incident angle θ value is ± 15 °, and optical wavelength λ value is 0.405-0.700 μ m, grating height h ₁Value is 0.15-0.30 μ m, the underlayer thickness h of substrate (1) ₂Value is 0.01-0.20 μ m.

7, the method for making sub-wave length grating guide mode resonance anti-false trademark according to claim 5, it is characterized in that: its periodic quantity of described grating is 0.20-0.75 μ m, grating (6) upper surface in compacting also covers the plastic sheeting (8) of layer of transparent and the material refractive index n of substrate (1) _s, grating layer equivalent refractive index n _e, plastic sheeting (8) refractive index n _g, incident angle θ, optical wavelength λ ', grating height h ₁', the underlayer thickness h of substrate (1) ₂' and plastic sheeting (8) height h ₃' following relation arranged:

$h_1\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_e^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_2\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_s^2-{\sin }^2\mathrm{\&theta;}}\right)$

$h_3\&prime;=\mathrm{\&lambda;}\&prime;/\left(2\sqrt{n_g^2-{\sin }^2\mathrm{\&theta;}}\right)$

The material refractive index n of substrate (1) _sValue is 1.200-2.000, the equivalent refractive index n of grating layer _eValue is 1.200-1.800, plastic sheeting refractive index n _gValue is 1.200-2.000, and incident angle θ value is ± 15 °, and optical wavelength λ ' is worth the m for 0.25-0.70 μ, grating height h ₁' be worth the m for 0.01-0.200 μ, the underlayer thickness h of substrate (1) ₂' be worth the m for 0.05-0.30 μ, plastic sheeting height h ₃' be worth m for 0.10-0.40 μ.

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