CN207541292U - A kind of filtering apparatus for 3D projections - Google Patents

Abstract

In order to solve the problems, such as that polarization spectro projection screen is expensive in existing 3D shadow casting techniques, the manufacture of spectrum eyeglass is difficult, the utility model proposes a kind of filtering apparatus for 3D projections.Including optical filter（3）, optical filter（4）, the optical filter（3）And optical filter（4）All it is Rugate filter, the two penetrates spectrum complementation in visible-range；The optical filter（3）, optical filter（4）Two or more layers lens structure is all used, one or two sub- membrane stack is plated on every layer of eyeglass, every sub- membrane stack all ends the light in a narrowband wavelength ranges；Together, all sub- membrane stacks form a comb filter to two or more layers lens combination.The 3D presentation modes based on spectrum can be realized using the eyeglass, without using metal shadowing's curtain of high-gain, without emitting synchronizing signal, picture flicker free；It solves the problems, such as to cannot be used for traditional 3D projections since laser has polarizability, improves the image quality of 3D projections.

Description

A kind of filtering apparatus for 3D projections

Technical field

The utility model belongs to projection, projection technologies, in particular belongs to a kind of filtering apparatus for 3D projections.

Background technology

3D films have been to be concerned by more and more people so that it is three-dimensional, true to nature, makes one the characteristics of on the spot in person；In addition 3D is projected Technology also obtains increasingly extensive application in fields such as teaching, meetings.Current most common 3D shadow casting techniques are based on the inclined of light Shaking property allows the right and left eyes of people to see the mutually perpendicular two beams polarised light in polarization direction, so as to which spectators be made to generate three-dimensional feeling.But It is that polarization 3D is very high to projection screen surface quality requirement, needs metal shadowing's curtain using high-gain.And for laser light source Projector, due to light source in itself have polarizability, left eye picture and right eye picture cannot be detached, influence to stand well The effect that body is shown.

Also someone is want through comb filtering piece so that the right and left eyes of people see spectrally complementary two-beam, so as to real Existing 3D projections.This 3D display method is without using metal shadowing's curtain of high-gain, and without emitting synchronizing signal, picture is without sudden strain of a muscle It is bright.Especially for laser light source projection, due to this method utilize to be frequency and the wavelength characteristic of light realize that 3D is divided It has been shown that, successfully solves the problems, such as laser polarization.But comb filtering piece needs to carry out multicoating operation on eyeglass, no Only Film Design difficulty is big, and higher to process equipment and technological requirement.Level is prepared with current optical thin film, even It is difficult to realize.

Invention content

In order to solve, polarization spectro projection screen in existing 3D shadow casting techniques is expensive, the manufacture of spectrum eyeglass is difficult asks Topic, the utility model proposes a kind of filtering apparatus for 3D projections.

All it is Rugate filter including the optical filter 3 described in optical filter 3, optical filter 4 and optical filter 4, the two penetrates light Spectrum is complementary in visible-range；The optical filter 3, optical filter 4 are all using two or more layers lens structure, on every layer of eyeglass One or two sub- membrane stack is plated, every sub- membrane stack all ends the light in a narrowband wavelength ranges；Two or more layers lens combination Together, all sub- membrane stacks form a comb filter.

As also respectively including an infrared anti-reflection film layer on the preferably described optical filter 3, optical filter 4.

The utility model advantageous effect：

1st, the 3D presentation modes based on spectrum can be realized using the eyeglass, without using the metal shadowing of high-gain Curtain, without emitting synchronizing signal, picture flicker free；

2nd, it solves the problems, such as to cannot be used for traditional 3D projections since laser has polarizability, improves the picture of 3D projections Face quality；

3rd, Rugate filter is manufactured by the way of multilayer eyeglass and the sub- membrane stack of multilayer, the technique for greatly reducing optical filter Difficulty and manufacture cost；

4th, infrared anti-reflection film is added on projector's optical filter, is effectively reduced the electromagnetism for the long wavelength for returning to projecting apparatus Wave slows down the heating problem of projector.

Description of the drawings

Fig. 1 is the individual layer lens structure figure in optical filter.

Fig. 2 is the filter sheet structure schematic diagram in embodiment two.

Fig. 3 is the projection system schematic diagram using the utility model filtering apparatus.

Fig. 4 is that left and right projector optical filter penetrates spectrogram in embodiment one.

Fig. 5 is that spectacle lens optical filter in left and right penetrates spectrogram in embodiment one.

Fig. 6 is that left and right projector optical filter penetrates spectrogram in embodiment two.

Fig. 7 is that spectacle lens optical filter in left and right penetrates spectrogram in embodiment two.

Specific embodiment

In order to solve, polarization spectro projection screen in existing 3D shadow casting techniques is expensive, the manufacture of spectrum eyeglass is difficult asks Topic, the utility model proposes a kind of filtering apparatus for 3D projections.

Embodiment one：

Using the projection system of the utility model projecting apparatus, including left projector 1, right projector 2, screen 5,3D glasses 6；

The left projector 1 and right projector 2 is set up in parallel, and the camera lens of projector is opposite with screen 5；

There is optical filter 3 in the left projector 1；There is optical filter 4 in right projector 2；The optical filter 3 and optical filter 4 be all Rugate filter, and the two penetrates spectrum complementation in visible-range；

Include left eyeglass lens 7, right eye eyeglass 8 on the 3D glasses 6；The transmission spectrum phase of left eyeglass lens 7 and optical filter 3 Together；Right eye eyeglass 8 and optical filter 4 are identical through spectrum.

The optical filter 3, optical filter 4, left eyeglass lens 7, right eye eyeglass 8 are all using two or more layers lens structure, often One or two sub- membrane stack is plated on layer eyeglass, every sub- membrane stack all ends the light in a narrowband wavelength ranges；Optical filter 3 is by more A individual layer optical filter 31 is formed, and individual layer optical filter 31 includes optical glass base 311, sub- membrane stack 312, sub- membrane stack 313.When So, can also there was only a straton membrane stack in every optical glass base 311.

Together, all sub- membrane stacks form a comb filter to two or more layers lens combination.For example, by using three layers Glass lens, two surfaces of every layer of glass all plate a straton membrane stack, that is, share six sub- membrane stacks.Again by triplex glass lens set Use is combined to get to a comb filter.It should be pointed out that the quantity of glass lens and sub- membrane stack is more, Spectrophotometric result is better, i.e. the three-dimensional sense of spectators is truer；But the quantity of glass lens and sub- membrane stack is more, the entirety of optical filter Light transmittance is with regard to smaller.Regardless of the quantity of glass lens and sub- membrane stack, principle is the same, all in the utility model Protection domain within.Optical filter 3, the transmission spectrum of optical filter 4 are as shown in Figure 4；The transmission light of left eyeglass lens 7, right eye eyeglass 8 Spectrum is as shown in Figure 5.

The left projector 1 includes housing 11, separates glass 12, light source 13, image processing system 14, camera lens 15, filter Mating plate 3, circuit radiator fan 16, circuit heat emission hole 17, light source heat radiation fan 18, light source heat radiation hole 19；The housing 11 is One cavity；Housing 11 is divided into front and rear two parts by the separation glass 12, and first half is used for placement of images processing system 14th, camera lens 15, latter half are used to arrange light source 13；The 13 face image processing system 14 of light source, camera lens 15, optical filter 3；The first half of the housing 11 also has circuit radiator fan 16, circuit heat emission hole 17；Circuit radiator fan 16 is located at housing 11 sides open up circuit heat emission hole 17 on the housing 11 of the opposite side of circuit radiator fan 16；The housing 11 it is latter half of Divide and also have light source heat radiation fan 18, light source heat radiation hole 19；The light source heat radiation fan 18 is located at 11 rear portion of housing, the light Source heat-dissipating hole 19 is located at 11 latter half side periphery of housing.

The light source 13 is UHP, UHE, xenon lamp, halogen light lamp, LED light source, mixes light source or laser light source.

The screen 5 is common cloth curtain, blank or white metope.

The right projector 2 is identical with 1 structure in addition to optical filter of left projection.

Light source of projector and circuit part set cooling system respectively, are convenient for targetedly controlling, and improve heat dissipation effect Fruit, for example, when power unit fever it is more serious when, can raising power unit heat radiation power.

Embodiment two：

On the basis of embodiment one, an infrared anti-reflection film layer 39 is also respectively included on the optical filter 3, optical filter 4. Such as Fig. 2, optical filter 3 is made of individual layer optical filter 31,32,33, and the wherein sub- membrane stack of individual layer optical filter 33 is infrared anti-reflection Film layer 39.

In electromagnetic wave, wavelength is longer, and fuel factor is more apparent.After adding infrared anti-reflection film 39, it can make longer wavelengths of red Outside line penetrates eyeglass without being reflected back projector, so as to slow down the fever phenomenon of projector.

The not necessarily proper infrared ray anti-reflection film of above-mentioned infrared anti-reflection film layer 39.Range that its is anti-reflection can be with Beyond infrared part, such as anti-reflection a part of visible red；Or anti-reflection range is more than infra-red range, and it is longer to extend to wavelength Electromagnetic wave.

The preferable specific embodiment of the above, only the utility model, but the scope of protection of the utility model is not This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, according to this practicality Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (2)

1. a kind of filtering apparatus for 3D projections, it is characterised in that：Including the first optical filter (3), the second optical filter (4), institute The first optical filter (3) and the second optical filter (4) stated all are Rugate filters, and the transmission spectrum of the two is mutual in visible-range It mends；First optical filter (3), the second optical filter (4) plate one all using two or more layers lens structure on every layer of eyeglass Or two sub- membrane stacks, every sub- membrane stack all end the light in a narrowband wavelength ranges；Two or more layers lens combination together, All sub- membrane stacks form a comb filter.

2. the filtering apparatus according to claim 1 for 3D projections, it is characterised in that：First optical filter (3), Also respectively include an infrared anti-reflection film layer on second optical filter (4).