CN205787187U - A kind of laser diffusion sheet - Google Patents

Abstract

This utility model relates to a kind of laser diffusion sheet, it includes matrix, the material of this matrix is glass, described matrix includes first and second be oppositely arranged, first face of this matrix is formed with an optical texture, described optical texture includes the cellular micro structure of multiple tight arrangement, and this cellular micro structure is by the first of matrix the concave architecture formed towards sunken inside.

Description

A kind of laser diffusion sheet

Technical field

This utility model relates to diffusion sheet technical field, particularly relates to a kind of laser diffusion sheet.

Background technology

Diffusion sheet (Diffuser) is for dissipating light, it is provided that a uniform area source, thus at LED illumination and flat board Display is used widely.The material of existing diffusion sheet has resin material (such as PET, PC, PMMA) and glass material.Existing The absorbance of resin diffusion sheet low, outgoing light field is uncontrollable, and there is defects such as " focuses ", it is impossible to be applied to laser system. Glass diffusion sheet is divided into clouded glass type, holographic and microlens array type.Clouded glass type glass diffusion sheet, due in the course of processing Middle existence inevitably sub-surface tear, it can cause the breakage of eyeglass even to burst under the effect of light laser, and can not As laser system.The preparation cost of holographic glass diffusion sheet is expensive, is suitable only for small breadth sample.Microlens array type glass Although diffusion sheet absorbance is high, but preparation cost is expensive.

Utility model content

In view of this, a kind of absorbance of necessary offer is high and can bear the diffusion sheet of strong laser irradiation.

This utility model provides a kind of laser diffusion sheet, and it includes matrix, and the material of this matrix is glass, described matrix bag Including first and second being oppositely arranged, the first face of this matrix is formed with an optical texture, and described optical texture includes many The cellular micro structure of individual tight arrangement, this cellular micro structure is by the first of matrix the concavity knot formed towards sunken inside Structure.

Preferably, the cup depth of described cellular micro structure is 100 microns～150 microns.

Preferably, a diameter of 1 micron～10 microns of described cellular micro structure.

Preferably, a diameter of 2 microns～8 microns of described cellular micro structure.

Preferably, the second face of this matrix is formed with described optical texture.

Preferably, the second face of this matrix is provided with anti-reflection film.

Preferably, the angle of flare of described laser diffusion sheet is 1 °～13 °.

Compared with prior art, the laser diffusion sheet that this utility model provides has the advantage that

Being provided with optical texture in the first face of matrix, this optical texture is the cellular micro structure of multiple tight arrangement, This cellular micro structure is by the first of matrix the concave architecture formed towards sunken inside.Expand relative to conventional microlens type For discrete piece is similar to plus lens, this laser diffusion sheet with optical texture is similar to negative lens structures, by this umbilicate type Cellular micro structure the folding diffraction of laser light wave can be realized diffusion preferable to laser light wave, thus can bear and strong swash Light irradiates and penetrates, and absorbance is high, and can adjust diffusion angle, light field and spatial distribution according to specifically used requirement.Described sharp Light diffusing sheet has a good application prospect.

Accompanying drawing explanation

Fig. 1 is the cross section structure schematic diagram (10 represent matrix, and 20 represent cellular micro structure) of described laser diffusion sheet.

Fig. 2 is the test schematic diagram of the angle of flare of described laser diffusion sheet.

The laser effect figure that Fig. 3 obtains when being and do not put diffusion sheet in Fig. 2.

The laser effect figure that Fig. 4 obtains when being and place common optical glass in Fig. 2.

The laser effect figure that Fig. 5 obtains when being and place laser diffusion sheet described in the utility model in Fig. 2.

Fig. 6 is that (wherein, curve a is not corresponding to setting for described laser diffusion sheet and the light transmittance test figure adding anti-reflection film Putting the laser diffusion sheet of anti-reflection film, curve b is provided with the laser diffusion sheet of anti-reflection film corresponding to one side, and curve c is equal corresponding to two sides It is provided with the laser diffusion sheet of anti-reflection film).

Specific examples below will further illustrate this utility model in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Hereinafter the laser diffusion sheet providing this utility model is described further.

Referring to Fig. 1 and Fig. 2, this utility model provides a kind of laser diffusion sheet, and it includes matrix 10, the material of this matrix 10 Material is glass.Described matrix 10 includes first and second be oppositely arranged.First face of this matrix is formed with an optics knot Structure.Described optical texture includes the cellular micro structure 20 of multiple tight arrangement, and this cellular micro structure 20 is by the of matrix Simultaneously cave inward the concave architecture formed.Concrete, the cup depth in the centre position of this concave architecture is than its peripheral position Cup depth deep, this concave architecture is similar to the concave architecture formed after a spheroid is pressed on soft mud ground.Described tight row Cloth refers to these two adjacent cellular microstructure portion contacts, and forms a ridge, now can be analogous to multiple diameter phase Multiple concave architecture that same or different spheroid is formed after being pressed on soft mud ground simultaneously.Two adjacent cellular micro structures 20 Diameter and the degree of depth can be different, it is possible to for identical.In actual fabrication process, most two adjacent cellular micro structures Diameter and the degree of depth for differing.This cellular micro structure is that the reason of concave architecture depends on concrete technology, is not repeated herein.

Utilize interferometric method can verify that micro structure that this cellular micro structure 20 is a depression.Described cellular micro structure 20 Cup depth is 100 microns～150 microns.Preferably, the cup depth of described cellular micro structure 20 is 125 microns ± 5 micro- Rice.In the present embodiment, the cup depth of described cellular micro structure 20 is about 125 microns.Described cellular micro structure 20 straight Footpath is 1 micron～10 microns.Preferably, a diameter of 2 microns～8 microns of described cellular micro structure 20.This is cellular micro- The purpose of the parameter designing of structure 20 is that the laser diffusion sheet with this parameter can have good absorbance, and can bear strong Laser irradiates and penetrates.

Refer to Fig. 2, described laser diffusion sheet is diffused angle test (test process).In Fig. 2, θ represents angle of flare, L represents the distance between diffusion sheet and test panel, and D represents the diameter of the laser facula received on test panel, and d represents incident The diameter of laser beam, it meets below equation:

$tan\mathrm{\θ}=\frac{D-d/2}{L}$

Then the computing formula of angle of flare θ is:

Described laser diffusion sheet is tested by this utility model embodiment, and obtaining its angle of flare is 1 °～13 °.

The laser facula obtained on test panel after test is as shown in Figure 5.It should be noted that Fig. 3 to Fig. 4 is in diffusion The design sketch of the side shooting of sheet.Relative to not putting diffusion sheet (Fig. 3), and it is obtained to place common optical glass (Fig. 4) Hot spot for, the diameter of the laser facula that this method obtains is greatly increased, this illustrate described laser diffusion sheet have excellence Optics diffusion.

It is appreciated that the second face of this matrix also can be formed with two faces of described optical texture, i.e. this matrix and be equipped with Described cellular micro structure.Now, comparing for only simultaneously arranging described optical texture, two sides is all provided with the laser of optical texture and expands Discrete piece is more similar to a negative lens structures, and it has more preferable light transmission.

When the first face of described laser diffusion sheet is provided with optical texture, the light transmittance of described laser diffusion sheet can be 90% Above, concrete, to the light transmittance of infrared-ultraviolet light more than 90%, to the light transmittance of light laser more than 92%.This matrix First and the second face be also provided with anti-reflection film.When two surfaces at described laser diffusion sheet are all provided with anti-reflection film further Time, the light transmittance of described laser diffusion sheet is up to 98%.Described anti-reflection film is existing anti-reflection film, does not repeats them here.

Refer in Fig. 6, described laser diffusion sheet (light transmittance of curve a) is up to 92%, and be provided with anti-reflection film it Afterwards (curve b and c), light transmittance increases.When its two sides is equipped with anti-reflection film, (absorbance corresponding to curve c) is up to 98% Above.

Compared with prior art, the laser diffusion sheet that this utility model provides has the advantage that

Being provided with optical texture in the first face of matrix 10, this optical texture is the cellular micro structure of multiple tight arrangement 20, this cellular micro structure 20 is the by matrix 10 first concave architecture formed towards sunken inside.Relative to conventional microlens For array type diffusion sheet is similar to plus lens, this laser diffusion sheet with optical texture is similar to negative lens structures, passes through The cellular micro structure 20 of this umbilicate type can realize diffusion preferable to laser light wave to the folding diffraction of laser light wave, thus Can bear strong laser irradiation and penetrate, absorbance is high, and can require that adjusting diffusion angle, light field and space divides according to specifically used Cloth.Described laser diffusion sheet has a good application prospect.

The explanation of above example is only intended to help to understand method of the present utility model and core concept thereof.Should refer to Go out, for those skilled in the art, on the premise of without departing from this utility model principle, it is also possible to this Utility model carries out some improvement and modification, and these improve and modification also falls into this utility model scope of the claims In.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this practicality new Type.Multiple amendment to these embodiments will be apparent from for those skilled in the art, is determined herein The General Principle of justice can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (7)

1. a laser diffusion sheet, it includes matrix, and the material of this matrix is glass, it is characterised in that described matrix includes phase To arrange first and second, the first face of this matrix is formed with an optical texture, described optical texture include multiple tightly The cellular micro structure of solid matter cloth, this cellular micro structure is by the first of matrix the concave architecture formed towards sunken inside.

2. laser diffusion sheet as claimed in claim 1, it is characterised in that the cup depth of described cellular micro structure is 100 Micron～150 microns.

3. laser diffusion sheet as claimed in claim 1, it is characterised in that described cellular micro structure a diameter of 1 micron～ 10 microns.

4. laser diffusion sheet as claimed in claim 3, it is characterised in that a diameter of 2 microns～8 of described cellular micro structure Micron.

5. laser diffusion sheet as claimed in claim 1, it is characterised in that the second face of this matrix is formed with described optics knot Structure.

6. laser diffusion sheet as claimed in claim 1, it is characterised in that the second face of this matrix is provided with anti-reflection film.

7. laser diffusion sheet as claimed in claim 1, it is characterised in that the angle of flare of described laser diffusion sheet is 1 °～13 °.