CN209231703U - A kind of anti-light curtain of change spacing - Google Patents

Abstract

The utility model discloses anti-light curtains of a kind of change spacing and preparation method thereof.The change anti-light curtain of spacing includes substrate layer and the prismatic structure layer on the substrate layer outer surface, which is characterized in that the prismatic structure layer is placed with the prism that the section that several are parallel to each other in the horizontal direction is triangle；Spacing between the prism is gradually increased from the bottom to top；The upper side of the prism is extinction face；The downside of the prism is reflective surface, is coated with reflecting coating.The utility model adjusts prismatic structure layer in the enterprising line space in the longitudinal direction of curtain, and spacing is gradually increased from the bottom to top, and the prism that can effectively avoid lower section blocks upper square glass prism close to it, makes the reflective surface of each prism that can play a role completely.The structure designs the raw material for not only saving prismatic structure layer, reduces manufacturing cost, and under the premise of maintaining identical reflective surface area, increases the region of extinction, and the additional absorptivity for increasing environment light, the interference for mitigating environment light increases contrast.

Description

A kind of anti-light curtain of change spacing

Technical field

The utility model belongs to anti-light curtain technical field, and in particular to a kind of anti-light curtain of change spacing.

Background technique

Patent US7262911B2 discloses a kind of reflective viewing screen (also known as anti-light curtain), and being used for will be from projector with phase The imaging of projection angled for viewer is reflected into the direction for being substantially perpendicular to the reflective viewing screen, i.e. viewer Positive front.The reflective viewing screen includes having the substrate of saw-tooth appearance and on an edge of each sawtooth of the substrate Light absorbing layer.The basic structure of existing reflective viewing screen is also on the whole in this way, be equipped with saw-tooth appearance, and sawtooth in substrate surface Form linear type, equidistant prism structure.

Conventional anti-light curtain, the prismatic on surface equally, when cooperation laser-projector in use, such as Fig. 1 and 2 Shown, very close with a distance from curtain due to laser-projector short distance, projector enters the top of curtain and bottom region Penetrating projection angle has huge difference, and the prismatic of lower section can block the top prismatic generation close to it, makes its reflective surface can not It plays a role completely and is equal to inactive area, cause unnecessary manufacturing cost.

Utility model content

Therefore, reflective surface can not be complete when the prism for the prism structure of reflective viewing screen in the prior art is equally spaced The technical issues of playing a role entirely, the purpose of this utility model is to provide a kind of anti-light curtain of change spacing, the change spacing is anti-light In curtain, the reflective surface of the prism in each region can play a role completely.

The anti-light curtain of change spacing of the utility model includes substrate layer and the prismatic on the substrate layer outer surface Structure sheaf, which is characterized in that it is triangle that the prismatic structure layer, which is placed with the section that several are parallel to each other in the horizontal direction, Prism；Spacing (the distance between at the top of adjacent prisms) between the prism is gradually increased from the bottom to top；The prism Upper side is extinction face；The downside of the prism is reflective surface, is coated with reflecting coating.

Preferably, the width of prism is denoted as L, the spacing between the adjacent prisms of bottom section is L-1.2L, intermediate region Adjacent prisms between spacing be 1.2L-1.5L, the spacing between the adjacent prisms in top region is 1.5L-1.9L.

Preferably, prism, which is one group with every 10-50 prismatic, is divided into N group, it is that spacing changes unit, rib in every group with group Spacing between mirror is consistent；Spacing between upper one group of prism than increase by 0.8 close to the spacing between next group of prism~ 1.2L/ (N-1), preferably 0.9L/ (N-1).

Preferably, the substrate layer material is glass or plastics.It is preferred that bent glass or plastics.

Wherein plastics can use polyester resin (polyester resin), polyacrylate resin (polyacrylate Resin), polyolefin resin (polyolefin resin), polycarbonate resin (polycarbonate resin), poly- amino Formate resin (polyurethane resin), Triafol T (TAC), thermoplastic polyurethane elastomer rubber (TPU), Polyurethane (PU) or polyvinyl chloride (PVC) etc..

Preferably, the prismatic structure layer material is UV resin (ultraviolet curable resin) or thermoplastic plastic.

The UV resin be selected from acrylate, Epocryl, aliphatic urethane acrylate resin, Aromatic urethane acrylate resin and polyester acrylate resin etc. can be through UV radiation curing resins.

Preferably, the reflecting coating be titanium oxide, zinc oxide, zirconium oxide, aluminium oxide, barium sulfate, mica, silica or Other applicable reflectorized materials.

Preferably, the angle α of the downside of the prism and the substrate layer is 20 °~50 ° preferably 35 °~45 ° more excellent 35 ° are selected, the smaller inverted image for reflexing to ceiling of α angle can be more obvious；The angle β of the upper side of the prism and the substrate layer It is 45 °~90 ° preferably 50 °~75 ° more preferable 75 °, β angle is smaller, and the extinction area on curtain is bigger, but also results in reflective Face area ratio, which reduces, reduces brightness.

Preferably, the substrate layer is with a thickness of 20-1000 μm；The prismatic structure layer with a thickness of 20-500 μm；It is reflective Coating with a thickness of 0.1-20 μm preferably 10~20 μm.

About the upper side of the prism, in some preferred embodiments of the utility model,

The upper side of the prism is coated with light-absorbing coating.

Preferably, the black light-absorbings materials such as carbon black, iron oxide black or black spinel can be selected in the light-absorbing coating material.

Preferably, the light-absorbing coating with a thickness of 1-20 μm.

About the upper side of the prism, in other preferred embodiments of the utility model,

There is the upper side of the prism roughening micro-structure of extinction can effectively absorb as first of extinction mechanism Light from environment also can be reduced the reflection light from environment and avoid influence downside anti-even if being not coated by light absorbent The imaging penetrated, therefore in production, prism structure surface need to only be eliminated in downside primary coating reflecting coating The coating process of side light-absorbing coating, is greatly improved production efficiency, production cost is effectively reduced.

Further, black particles are evenly distributed in the prismatic structure layer.

Preferably, the black particles are carbon black, iron oxide black or black spinel, the black particles account for the prismatic structure layer The 0.1%~2% of gross weight.

The black particles being added can be absorbed into prism surface as second extinction mechanism and be roughened micro-structure Environment light, further strengthen extinction effect.

Further, the substrate layer backside coating has black light-absorption layer.The black light-absorption layer at the back side is as The environment light through the prismatic structure layer can be absorbed in three extinction mechanism, further reinforcing extinction effect.

Preferably, surface roughness Rz value (roughness profile maximum peak height and the maximum valley depth of the upper side of the prism The sum of) it is 1 μm~7 μm.

The anti-light curtain of change spacing of the utility model step can be prepared by the following method:

A) prismatic structure layer is made by hard mold and mantle technique: UV resin is coated on substrate front, is had using surface There is the mold roller of striped micro-structure to carry out roll-in, UV curing molding technology of arranging in pairs or groups in nipping process, by the UV resin on substrate layer Coining is formed by curing shaggy prismatic structure layer；Or thermoplastic plastic is coated on substrate front, had using surface The mold roller of striped micro-structure carries out roll-in, Hot-press cooling curing molding technology of arranging in pairs or groups in nipping process, by the heat on substrate layer Plastotype is plastic embossed to be formed by curing shaggy prismatic structure layer；Wherein the spacing between the striped on the mold roller is gradually Variation；

B) reflectorized material optical treatment: is coated to the downside of prismatic structure layer.

In the step a, there is the mold roller of striped micro-structure the production of fine turning lathe processing technology can be used on surface, usually Use roller coining (Rollerimprint) and nanometer transfer printing (Nanoimprinting lithography) technology, principle Be using Ultraprecision Machining, such as with shape monocrystalline diamond knife process a plurality of knife mark on the coat of metal of drum die with Form the mold roller with striped micro-structure.

In the step a, the solidified forming of prismatic structure layer forms structure using photocuring or Hot-press cooling.

It, can solidified forming by ultraviolet light irradiation when UV resin roll-in when using photocuring.

It when using Hot-press cooling, is coated with after thermoplastic plastic is heated, is formed after gradually being cooled down in nipping process.It can be used Chill roll is cooled down.

In the step a, there is the mold roller of striped micro-structure can also carry out surface roughening treatment in advance on surface, specifically Its surface can be made to generate irregular wedgelike micro-structure by electroplating technology in its electroplating surface mist nickel layer；Or to its carry out Sandblasting operation hits its surface by glass sand and forms irregular pothole.It is carried out using the mold roller through surface roughening treatment The prismatic structure layer of imprinting moulding can form the roughening micro-structure of extinction.

Preferably, when coating reflectorized material, the modes such as coating, spraying, sputter can be used in step b.

It should be noted that the thickness for coating reflectorized material is answered when prismatic structure layer surface has roughening micro-structure At 10 μm or more, to ensure that roughened textures are covered and keep planarization by reflectorized material.

When prismatic structure layer surface does not have roughening micro-structure, light absorbent can be coated in the upper side of prism to expire The step of needs of sufficient extinction function, coating light absorbent, can come behind step b.It certainly, can also be before step a, in UV Black particles are mixed into resin and thermoplastic plastic, prismatic structure layer of imprinting moulding itself will also have the function of extinction.

The utility model has the following beneficial effects:

1, the anti-light curtain of change spacing of the utility model is according to the feature of laser-projector short-throw projection, to prismatic structure layer In the longitudinal direction of curtain, enterprising line space is adjusted, and spacing is gradually increased from the bottom to top, can effectively avoid lower section prism block close to Its upper square glass prism makes the reflective surface of each prism that can play a role completely.The structure design that the utility model becomes spacing not only saves The raw material of prismatic structure layer have been saved, manufacturing cost is reduced, and under the premise of maintaining identical reflective surface area, on the other hand may be used Increase the region of extinction, so can additionally increase the absorptivity of environment light, the interference for mitigating environment light increases contrast, Jin Erti Rise contrast.

2, in some preferred embodiments of the utility model, the upper side of the prism has the micro- knot of roughening of extinction Structure can effectively absorb the light from environment as first of extinction mechanism, even if being not coated by light absorbent, also can be reduced and From the reflection light of environment avoid under the influence of offside reflection imaging, therefore production when, prism structure surface only need to be under Side primary coating reflecting coating eliminates the coating process of upper side light-absorbing coating, is greatly improved production efficiency, has Effect reduces production cost.

3, in some preferred embodiments of the utility model, black particles are evenly distributed in the prismatic structure layer, institute Stating substrate layer backside coating has black light-absorption layer.The black particles being wherein added can be inhaled as second extinction mechanism The environment light into prism surface roughening micro-structure is taken in, extinction effect is further strengthened.And the black light-absorption layer at the back side As third road extinction mechanism, the environment light through the prismatic structure layer can be absorbed, further reinforcing extinction effect. The anti-light curtain of the preferred embodiment includes the roughening micro-structure, internal black particles and the black light-absorbing at the back side on surface Layer has three extinction mechanism altogether, has excellent assimilation effect to environment light, and then can effectively avoid environment light to imaging Interference phenomenon, effectively promote the visual perception that watches of client.

4, in the method for the utility model preparation anti-light curtain, prismatic structure layer is by hard mold and mantle technique Come what is carried out, acrylate to be solidified is coated on substrate, rolling forming technology of arranging in pairs or groups, by the knife mark on mold roller (or micro structured pattern) transcription is formed by curing the prismatic structure layer with optical effect, technique on bottom surface layer Process simple and effective, can effectively reduce production cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of existing common anti-light curtain；

Fig. 2 is that schematic diagram is reflected in the projection of existing common anti-light curtain；

Fig. 3 is the vertical change spacing schematic diagram that the utility model becomes the anti-light curtain of spacing；

Fig. 4 is the partial structural diagram that the utility model embodiment 1~6 becomes the anti-light curtain of spacing；

Fig. 5 is the preparation process schematic diagram that the utility model embodiment 1~6 becomes the anti-light curtain of spacing；

Fig. 6 is the partial structural diagram that the utility model embodiment 7~8 becomes the anti-light curtain of spacing；

Fig. 7 is the extinction schematic diagram that micro-structure is roughened in the utility model embodiment 7~8；

Fig. 8 is the preparation process schematic diagram that the utility model embodiment 7~8 becomes the anti-light curtain of spacing.

Appended drawing reference

Substrate layer 1, prismatic structure layer 2, reflecting coating 21, light-absorbing coating 22, roughening micro-structure 23, black particles 24, Black light-absorption layer 3.

Specific embodiment

Below in conjunction with specific embodiment, the utility model is described in further detail.It should be understood that following embodiment is only used for Bright the utility model is not for restriction the scope of the utility model.

Fig. 3 show the side structure schematic view of the anti-light curtain of change spacing of some preferred embodiments of the utility model, Prismatic structure layer 2 including substrate layer 1 and on 1 outer surface of substrate layer.Prismatic structure layer 2 is placed with several along level The section that direction is parallel to each other is the prism of triangle, and the spacing between prism is gradually increased from the bottom to top.The downside of each prism Face is reflective surface, is coated with reflecting coating 21.Perpendicular between the upper side of each prism and each prism is extinction face, is inhaled Smooth surface can coat light-absorbing coating or the roughening micro-structure that extinction is made.

Size about each layer structure:

Preferably, be denoted as L with the width of prism the distance between (i.e. upper along and lower edge), the adjacent prisms of bottom section it Between spacing L1 be L-1.2L, the spacing L2 between the adjacent prisms of intermediate region is 1.2L-1.5L, top region it is adjacent Spacing L3 between prism is 1.5L-1.9L.Further, due to the width of the prism on prismatic structure layer 2 generally 1mm with Under, if the spacing between every prism all goes to manufacture by the way of becoming spacing, it will increase the manufacture difficulty of production mould；For The feasibility of production is improved, can be one group with every 10-50 prism and be divided into N group, is that spacing changes unit with group, by spacing It is gradually increased；Spacing in every group between prism is consistent；Spacing ratio between upper one group of prism close to next group of prism it Between spacing increase by 0.8~1.2L/ (N-1) preferably 0.9L/ (N-1).

Preferably, the angle α of the downside of prism and substrate layer 1 is 20 °~50 ° preferably 35 °~45 ° more preferable 35 °, α The smaller inverted image for reflexing to ceiling of angle can be more obvious；The upper side of prism and the angle β of substrate layer 1 are 45 °~90 ° preferred 50 °~75 ° more preferable 75 °, β angle is smaller, and the extinction area on curtain is bigger, but also results in the diminution of reflective surface area ratio Reduce brightness.

Preferably, 1 thickness d 1 of substrate layer is 20-1000 μm；The thickness d 2 of prismatic structure layer 2 is 20-500 μm；Reflective painting Layer with a thickness of 0.1-20 μm preferably 10~20 μm.

α, β, d1, d2 label are shown in Fig. 4.

Material about each layer structure:

Preferably, 1 material of substrate layer is glass or plastics.It is preferred that bent glass or plastics.Wherein plastics can be adopted With polyester resin (polyester resin), polyacrylate resin (polyacrylate resin), polyolefin resin (polyolefin resin), polycarbonate resin (polycarbonate resin), polyurethane resin (polyurethane resin), Triafol T (TAC), thermoplastic polyurethane elastomer rubber (TPU), polyurethane (PU) Or polyvinyl chloride (PVC) etc..

Preferably, 2 material of prismatic structure layer is UV resin (ultraviolet curable resin) or thermoplastic plastic.UV resin is selected from Acrylate, Epocryl, aliphatic urethane acrylate resin, aromatic urethane acrylate tree Rouge and polyester acrylate resin etc. can be through UV radiation curing resins.

Preferably, reflecting coating 21 be titanium oxide, zinc oxide, zirconium oxide, aluminium oxide, barium sulfate, mica, silica or its The reflectorized material that he is applicable in.

Examples 1 to 6

Fig. 4 shows the partial structurtes side view signal of the anti-light curtain of change spacing of the utility model preferred embodiment 1~6 The extinction face of figure, prismatic structure layer 2 is coated with light-absorbing coating 22.Table 1 shows the anti-light curtain of change spacing of Examples 1 to 6 Relevant parameter.

The relevant parameter of the anti-light curtain of 1 Examples 1 to 6 of table

The preparation process of the anti-light curtain of change spacing of the utility model embodiment 1~6 is as shown in figure 5, steps are as follows:

A) prismatic structure layer is made by hard mold and mantle technique: UV resin is coated on substrate front, is had using surface There is the mold roller of striped micro-structure to carry out roll-in, UV curing molding technology of arranging in pairs or groups in nipping process, by the UV resin on substrate layer Coining is formed by curing prismatic structure layer；Or thermoplastic plastic is coated on substrate front, there is striped micro-structure using surface Mold roller carry out roll-in, Hot-press cooling curing molding technology of arranging in pairs or groups in nipping process, by the thermoplastic plastic pressure on substrate layer Print is formed by curing prismatic structure layer；Wherein the spacing between the striped on the mold roller gradually changes；

B) optical treatment: reflectorized material is coated to the downside of prismatic structure layer, upper side coats light absorbent.

In step a, there is the mold roller of striped micro-structure the production of fine turning lathe processing technology can be used on surface, usually used Roller imprints (Rollerimprint) and nanometer transfer printing (Nanoimprinting lithography) technology, and principle is benefit A plurality of knife mark is processed on the coat of metal of drum die with Ultraprecision Machining, such as to shape monocrystalline diamond knife to be formed Mold roller with striped micro-structure.Since the spacing between prism is gradually increased from the bottom to top, in requisition for mold roller table Spacing between the micro-structure striped in face is also to be gradually increased, therefore CNC Cutting parameters need to be set before making mold roller.

In step a, the solidified forming of prismatic structure layer forms structure using photocuring or Hot-press cooling.Using photocuring When, it can solidified forming by ultraviolet light irradiation when UV resin roll-in.When using Hot-press cooling, applied after thermoplastic plastic is heated Cloth forms after gradually cooling down in nipping process.Chill roll can be used to be cooled down.

In step b, when coating reflectorized material and light absorbent, the modes such as coating, spraying, sputter can be used.

The performance test results

Using the anti-light curtain of change spacing of the embodiments of the present invention 1~6 as preceding throwing screen, visual performance survey is carried out Examination, while as a comparison with commercially available anti-light curtain SupernovaTM STS (DNP) and CBSP (and annotating science and technology).Test index Including brightness uniformity, yield value, contrast and half angle of view etc., the results are shown in Table 2.

Wherein the survey calculation method of every test index is as follows:

Brightness uniformity [%]=(brightness min/ brightness max) × 100

Wherein, brightness min is the brightness minimum value in the brightness measured in the region for being divided into nine parts.Brightness max It is the brightness maxima in the brightness measured in the region for being divided into nine parts.

Contrast=white the image brightness in the bright room/black image brightness in bright room

Yield value=π × (the white image brightness in darkroom (nit)/projector illumination (lux))

Wherein, the white image brightness in bright room refers to that projector projects 100% complete white pattern to reflection in the case where there is environment light lamp source The center luminance that type screen measures.The bright black image brightness in room refers to that projector's projection 100% is complete in the case where there is environment light lamp source The center luminance that black pattern is measured to reflection type screen.The white image brightness in darkroom refers to the projector under no environment light lamp source The center luminance that 100% complete white pattern of projection is measured to reflection type screen.Projector illumination refers under no environment light lamp source The brightness value that light source of projector measures.Half angle of view refers to angle corresponding when yield value is a half value, is related to ornamental Angular field of view width.

The performance test results of the anti-light curtain of change spacing of 2 the utility model embodiment 1~6 of table

	Brightness uniformity	Yield value	Contrast	Half angle of view
					SupernovaTM STS	89%	0.95	39	30°
CBSP	80%	0.37	22	80°
					Embodiment 1	84%	0.56	24	70°
Embodiment 2	85%	0.49	21	70°
					Embodiment 3	85%	0.53	22	70°
Embodiment 4	83%	0.61	26	70°
					Embodiment 5	82%	0.33	15	75°
Embodiment 6	85%	0.35	19	70°

As shown in Table 2, the utility model embodiment 1~6 is compared to Supernova^TMSTS has half view more widened Angle；And compared to CBSP, Examples 1 to 4 has more excellent yield value, and contrast also has good performance, it is seen that this reality There is more preferably comprehensive performance compared to existing commercially available product with new embodiment 1~4, before more wide application Scape.

Embodiment 7~8

Fig. 6 shows the partial structural diagram of the anti-light curtain of change spacing of the utility model preferred embodiment 7~8, The extinction wheat flour of prismatic structure layer 2 is also evenly distributed with black particles in prismatic structure layer 2 at the roughening micro-structure 23 of extinction 24,1 backside coating of substrate layer has black light-absorption layer 3.

The surface roughness Rz value (the sum of roughness profile maximum peak height and maximum valley depth) in 2 extinction face of prismatic structure layer is 1 μm~7 μm.The roughening micro-structure in extinction face, as first of extinction mechanism, as shown in fig. 7, can effectively absorb from environment Light also can be reduced the imaging of offside reflection under the influence of the reflection light from environment avoids even if being not coated by light absorbent Light, therefore in production, prism structure surface only need to eliminate upper side extinction in downside primary coating reflecting coating The coating process of coating, is greatly improved production efficiency, production cost is effectively reduced.Black particles 24 in prismatic structure layer 2 For carbon black, iron oxide black or black spinel (embodiment 7~8 and comparative example 1~2 select carbon black), black particles account for prismatic structure layer The 0.1%~2% of gross weight.Black particles 24 are used as second extinction mechanism, can be absorbed into prism surface and are roughened micro- knot The environment light of structure further strengthens extinction effect.The black light-absorption layer 3 at 1 back side of substrate layer is used as third road extinction mechanism, can be with The environment light for penetrating prismatic structure layer is absorbed, further reinforcing extinction effect.

Table 3 shows the anti-light curtain of change spacing and comparative example 1~2 of the utility model preferred embodiment 7~8 etc. The relevant parameter of the anti-light curtain of spacing.

The relevant parameter of the anti-light curtain of 3 comparative example 1~2 of table and embodiment 7~8

The anti-light curtain of change spacing of the utility model preferred embodiment 7~8 and preparation process such as Fig. 8 of comparative example 1~2 Shown, steps are as follows:

A) surface roughening of mold roller: there is the mold roller of striped micro-structure to turning rear surface, pass through electroplating technology In its electroplating surface mist nickel layer, its surface is made to generate irregular wedgelike micro-structure；

B) optical prism array is made by hard mold and mantle technique: the UV resin for being uniformly mixed with black particles in advance is applied Cloth carries out roll-in in substrate front, using the mold roller through step a surface roughening, UV curing molding skill of arranging in pairs or groups in nipping process UV resin coining on substrate layer is formed by curing shaggy optical prism array by art；

C) optical treatment: reflectorized material is coated to the downside of optical prism array, it is ensured that reflectorized material ties roughening Structure covers and keeps planarization；

D) back side blacking: after step c optical treatment, by the back side blacking (being had been omitted from the block diagram) of substrate.

Wherein, in the step a of embodiment 7~8 and comparative example 1~2, prismatic structure layer is all made of surface and is roughened through nickel plating The mold roller imprinting moulding of processing, simultaneously added with the black particles of different weight percentage composition in prismatic structure layer.Difference exists In the micro- striped in the surface of mold roller used by embodiment 7~8 is to become spacing；The table for the mold roller that comparative example 1~2 uses The micro- striped in face is equidistant.Since the spacing between prism is gradually increased from the bottom to top, in requisition for die roll surface Spacing between micro-structure striped is also to be gradually increased, therefore CNC Cutting parameters need to be set before making mold roller.

In addition, there is the mold roller of striped micro-structure about surface, fine turning lathe processing technology system can be used in step a Make, imprint (Rollerimprint) and nanometer transfer printing (Nanoimprinting lithography) technology usually using roller, Its principle is to utilize Ultraprecision Machining, such as process a plurality of knife mark in the metal-plated of drum die to shape monocrystalline diamond knife To form the mold roller with striped micro-structure on layer.

In step a, sandblasting operation realization is also can be used in the surface roughening of the mold roller with striped micro-structure, passes through glass Glass sand hits die roll surface and forms irregular pothole.

Step b can also be completed by thermoplastic shaping technique, specifically: it will uniformly be mixed with the thermoplastic shape of black particles in advance Material is coated on substrate front, carries out roll-in using the mold roller through step a surface roughening, Hot-press cooling of arranging in pairs or groups in nipping process Thermoplastic plastic coining on substrate layer is formed by curing shaggy optical prism array by curing molding technology.

The performance test results

Using the anti-light curtain of comparative example 1~2 and the embodiments of the present invention 7~8 as preceding throwing screen, sense of vision is carried out It can test, the results are shown in Table 4.

The performance test results of 4 comparative example 1~2 of table and the anti-light curtain of embodiment 7~8

As shown in Table 4, compared to the anti-light curtain of comparative example 1, the change spacing of the utility model embodiment 7 and embodiment 8 The contrast of anti-light curtain is significantly improved.And compared to comparative example 2, in the case where adding same amount of carbon black, this While the contrast of the anti-light curtain of change spacing of utility model embodiment 7 gets a promotion, yield value can't be because of change spacing Structure and reduce.

To sum up, the anti-light curtain of change spacing of the utility model is according to the feature of laser-projector short-throw projection, to prismatic knot Structure layer is adjusted in the enterprising line space in the longitudinal direction of curtain, and spacing is gradually increased from the bottom to top, and the prism that can effectively avoid lower section blocks Close to its upper square glass prism, make the reflective surface of each prism that can play a role completely.The utility model becomes the structure design of spacing not The raw material of prismatic structure layer are only saved, reduce manufacturing cost, and under the premise of maintaining identical reflective surface area, another party Face can increase the region of extinction, so can additionally increase the absorptivity of environment light, the interference for mitigating environment light increases contrast, into And promote contrast.

The preferred embodiment created to the utility model above is illustrated, but the utility model is created not It is limited to embodiment, those skilled in the art are various etc. without prejudice to can also make under the utility model precondition for innovation Same variation or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.

Claims (9)

1. a kind of anti-light curtain of change spacing comprising substrate layer and the prismatic structure layer on the substrate layer outer surface, It is characterized in that, the prismatic structure layer is placed with the prism that the section that several are parallel to each other in the horizontal direction is triangle； Spacing between the prism is gradually increased from the bottom to top；The upper side of the prism is extinction face；The downside of the prism For reflective surface, it is coated with reflecting coating.

2. becoming the anti-light curtain of spacing as described in claim 1, which is characterized in that the width of prism is denoted as L, the phase of bottom section Spacing between adjacent edge mirror is L-1.2L, and the spacing between the adjacent prisms of intermediate region is 1.2L-1.5L, top region Spacing between adjacent prisms is 1.5L-1.9L.

3. becoming the anti-light curtain of spacing as described in claim 1, which is characterized in that prism is one group total with every 10-50 prismatic It is divided into N group, is that spacing changes unit with group, the spacing in every group between prism is consistent；Spacing between upper one group of prism Than increasing by 0.8~1.2L/ (N-1) close to the spacing between next group of prism.

4. becoming the anti-light curtain of spacing as described in claim 1, which is characterized in that the substrate layer material is glass or plastics.

5. as described in claim 1 become the anti-light curtain of spacing, which is characterized in that the prismatic structure layer material be UV resin or Thermoplastic plastic.

6. as described in claim 1 become the anti-light curtain of spacing, which is characterized in that the reflecting coating be titanium oxide, zinc oxide, Zirconium oxide, aluminium oxide, barium sulfate, mica or silica.

7. the anti-light curtain of change spacing as described in any one of claims 1 to 6, which is characterized in that the upper side of the prism applies It is covered with light-absorbing coating.

8. the anti-light curtain of change spacing as described in any one of claims 1 to 6, which is characterized in that the upside mask of the prism There is the roughening micro-structure of extinction.

9. becoming the anti-light curtain of spacing as claimed in claim 8, which is characterized in that be evenly distributed in the prismatic structure layer black Colored particle.