CN205193309U - Binary channels dichroic mirror and projection arrangement - Google Patents
Binary channels dichroic mirror and projection arrangement Download PDFInfo
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- CN205193309U CN205193309U CN201520970634.XU CN201520970634U CN205193309U CN 205193309 U CN205193309 U CN 205193309U CN 201520970634 U CN201520970634 U CN 201520970634U CN 205193309 U CN205193309 U CN 205193309U
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Abstract
The utility model discloses a binary channels dichroic mirror and projection arrangement, binary channels dichroic mirror includes: a relative rectangular prism and the 2nd rectangular prism who sets up in inclined plane, the binary channels no. 2 of setting between a rectangular prism and the 2nd rectangular prism two inclined planes is to coating film and cementing layer. Projection arrangement adopts binary channels laser lamp -house, includes: binary channels dichroic mirror, a first blue laser module for $facing binary channels dichroic mirror sends the blue laser of s polarization, a blue laser module of second for $facing binary channels dichroic mirror sends the blue laser of p polarization, the 1 14 wave plate and the first fluorescence dish of following the light path orientation setting of first blue laser module, the 2 14 wave plate and the second fluorescence dish of following the light path orientation setting of the blue laser module of second. The utility model discloses a projection arrangement adopts binary channels laser lamp -house, and its output luminance can improve the one time, and when the laser illumination of one of them passageway was become invalid, projection arrangement still can continue work.
Description
Technical field
The utility model relates to the LASER Light Source field for projection arrangement, is specifically related to a kind of binary channels dichroic mirror and projection arrangement.
Background technology
Existing projector Bian high-pressure sodium lamp (UHP) is as light source, and not only volume is large, Heavy Weight, explosive, and serviceable life is short, brightness is low, energy consumption is large, color difference, and more troublesome is the mercury material using non-environmental protection.Therefore, LASER Light Source one of focus becoming field of projection display in recent years.But, due to the LASER Light Source of the full laser of Bian red, green, blue, not only light source cost is high, and the output power of green laser dislikes low, there is laser speckle and expand the difficult problems such as even bundle especially, thus mode practical be at present with wavelength 460nm near blue LASER Excited Fluorescence powder obtain white light.As shown in Figure 1, LASER Light Source is structure conventional at present, fluorescence dish 11 is reflected to after the blue laser beam 9 of s polarization incides dichroic mirror 10, again through dichroic mirror 10 after being returned by blue laser excitation red green fluorescence out, the blue laser light fluorescence dish 11 of remainder simultaneously, by being reflected by dichroic mirror 10 after an extra optical system, thus obtain the white light of red-green-blue composition.The dichroic mirror design comparison of this system is simple, as long as the blue laser of s polarization can be reflected, and the red green fluorescence of transmission s and p polarization.But this system has two problems: one is the blue laser due to dichroic mirror 10 not transmission s polarization, an extra optical system is therefore needed to collect blue laser; Two is that the laser power that exports is lower, and the fluorescence be excited is more weak, and display brightness is not enough.
Application publication number is that the Chinese invention patent application of CN104698729A (application number is 201410723068.2) discloses a kind of projection arrangement, the optical module of DPL projector and the method for the manufacture of dichroic mirror, a kind of light film block for projection arrangement, comprise: the first excitation beam source, described first excitation beam source is designed for the first excitation beam launched and have the first value of at least one optical properties; Second excitation beam source, described second excitation beam source is designed for the second excitation beam launched and have the second value of at least one optical properties, and described second value and first is worth different; At least one fluorescent material, described fluorescent material is designed for and makes described first excitation beam convert the first conversion light beam to and make described second excitation beam convert the second conversion light beam to; First dichroic mirror, described first dichroic mirror is arranged in the light path between described first excitation beam source and field of illumination that can be predetermined; Second dichroic mirror, described second dichroic mirror is arranged in the light path between described second excitation beam source and field of illumination that can be predetermined; First focalizer, described first focalizer is arranged in the light path between described first dichroic mirror and described field of illumination that can be predetermined; Second focalizer, described second focalizer is arranged in the light path between described second dichroic mirror and described field of illumination that can be predetermined; Optical element, reflects at least in part when maintaining at least one optical properties analog value of described first excitation beam and the second excitation beam.Above-mentioned technical scheme, by the improvement of optical texture, makes its compact conformation, and efficiency improves, but, still larger improvement is not carried out to dichroic mirror, still there are the problems referred to above.
Application number is that the Chinese invention patent application of 201510586053.0 (publication number is CN105044806A) discloses a kind of dichroic mirror and the projection arrangement with laser conjunction beam function, LASER Light Source as shown in Figure 2, the extra optical system that the collection shown in Fig. 1 remains blue laser is eliminated dexterously with a quarter-wave plate 14, that is: the blue laser beam 12 of s polarization is reflected by dichroic mirror 13, circularly polarized light is become through after quarter-wave plate 14, after fluorescence excitation, remaining blue laser is reflected by fluorescence dish 15, the blue laser of p polarization after quarter-wave plate 14 transmission can through dichroic mirror 13, so just can with simultaneously through dichroic mirror 13 without the red green fluorescence synthesize white light of polarization.But Output of laser power is lower, display brightness is not enough problem that this LASER Light Source still also exists, the purpose of this utility model will address this problem just.If the system shown in Fig. 2 is called single channel LASER Light Source, then system of the present utility model can be described as twin-channel laser light source, and the display brightness of the latter is expected to double than the former.
Utility model content
The purpose of this utility model is to provide a kind of binary channels dichroic mirror and projection arrangement, and projection arrangement adopts twin-channel laser light source, and its output brightness can double.
Design of the present utility model is:
In order to improve LASER Light Source brightness, the quantity of laser beam must be increased, how used single channel laser beam being increased to twin-channel laser bundle, the problem of the utility model needs solution that Here it is.The utility model proposes conception: if can design a binary channels dichroic film, it can make the blue laser beam reflection of the s polarization of one of them passage incidence, the blue laser of the residue after fluorescence excitation and red green fluorescence transmission for this reason; And make the blue laser beam transmission of the p polarization of another passage incidence, the blue laser of the residue after fluorescence excitation and the reflection of red green fluorescence, then just can reach the object of two-beam synthesis.Regrettably, the difficulty designing this binary channels dichroic film is very large, because can find out, the optical characteristics of these two passages is actually diametrically opposite: a passage is long wave flow-through film, and another passage is shortwave flow-through film.These two diametrically opposite characteristics will realize on same film, are almost impossibilities.But; if we regulate the incident angle of incoming laser beam; 55 ° and 35 ° are changed respectively into from the incident angle 45 ° of current use system; namely 10 ° are increased and decreased respectively, can miracle no generation? design shows, if dichroic mirror adopts block prism structure; increase polarization effect as much as possible; increase the polarization separation of two polarized components on the blue laser wavelength of shortwave, suppress the polarization separation on long-wavelength fluorescence wave band, then above-mentioned design is in the cards simultaneously.Although the film of this block prism structure and the threshold for resisting laser damage of glue-line can be lower than slab construction, but the position be incident on dichroic film due to the blue laser beam of binary channels is different, therefore output intensity is than being now expected realization by the target that single channel laser projection doubles, this light-source system in, still do not lose its using value in the laser projection of low-light level.
According to above-mentioned conception, used dichroic mirror must do following change: 1. replace dull and stereotyped formation dichroic mirror with block prism; 2. the polarization state of the blue laser beam of pair incidence, changes into twin-channel s polarized light and p polarized light by existing with single pass s polarized light; 3. the incident angle of the blue laser beam of pair incidence, changes into twin-channel 55 ° and 35 ° by existing with single pass 45 °; 4. the polarization effect of pair dichroic mirror, not require to change into twin-channel polarization effect large as much as possible with single pass by existing; 5. pair dichroic film, now uses single pass requirement: when incident angle is 45 °, to blue laser s reflection of polarization, p polarization transmission, to the whole transmission of red green fluorescence.To the twin-channel requirement of the utility model: when incident angle is 55 °, the same with single channel during incident angle 45 °, namely to blue laser s reflection of polarization, p polarization transmission, to the whole transmission of red green fluorescence; And when incident angle is 35 °, be also s reflection of polarization, p polarization transmission to blue laser, red green fluorescence is but all reflected.
For achieving the above object, the concrete technical scheme that the utility model is taked is:
A kind of binary channels dichroic mirror, comprising:
The first right-angle prism that inclined-plane is oppositely arranged and the second right-angle prism;
Be arranged on the binary channels dichroic film between described first right-angle prism and the second right-angle prism two inclined-planes and cementing layer.
Following as optimal technical scheme of the present utility model:
Described binary channels dichroic film is arranged on the inclined-plane of described first right-angle prism, and the one side of described cementing layer is connected with described binary channels dichroic film, and another side is connected with the inclined-plane of described second right-angle prism.
The first described right-angle prism and the second right-angle prism equal and opposite in direction, the first described right-angle prism and the second right-angle prism are isosceles right-angle prism, and namely its angle is 45 degree, 45 degree, 90 degree.
Described binary channels dichroic film comprises: on the inclined-plane of the first right-angle prism, be provided with the first coupling film system, main film system and the second coupling film system successively;
The first described coupling film system and the second coupling film system form by high refractive index film, secondary high refractive index film and secondary low refractive index film; Described main film system is made up of high refractive index film, secondary high refractive index film, secondary low refractive index film and low refractive index film; Described high refractive index film is TiO
2film, secondary high refractive index film is Ta
2o
5film, secondary low refractive index film is SiO
2film, low refractive index film is MgF
2film.High refractive index film in the utility model, secondary high refractive index film, secondary low refractive index film and low refractive index film, high, secondary high, secondary low, low be relative concept, for showing the relative height of refractive index.
The first described coupling film system number of plies is 8 layers, and from the inclined-plane of the first right-angle prism, the thickness of outside each rete is followed successively by: 283.2,11.7,60.7,143.2,70.6,40.1,91.1,49.3, and unit is nm; In the first coupling film system, the 4th layer is high refractive index film, and the 2nd, 6,8 layer is time high refractive index film, and all the other are time low refractive index film.
Described main film is 47 layers, be followed successively by from the thickness of the first outside each rete of coupling film system: 90.7, 39.2, 65.8, 55.7, 91.3, 32.3, 117.3, 15.9, 31.7, 77.4, 43.7, 89.9, 55.3, 48.5, 53.4, 98.4, 27.3, 92.5, 20.8, 157.6, 9.4, 161.9, 88.2, 350.5, 96.6, 437.7, 87.3, 462.1, 64.2, 71.5, 101.4, 11.0, 215.7, 71.5, 138.6, 337.4, 42.4, 67.5, 149.7, 14.0, 178.8, 57.4, 5.6, 164.7, 18.5, 181.5, 60.4, unit is nm, in main film system, 2nd, 4,9,11,13,15,17,19,21,25,27,29,37,42,47 layers is high refractive index film, 6th, 23,32,34,40,43,45 layers is time high refractive index film, 3rd, 8,22,24,30,35,38 layers is time low refractive index film, and all the other are low refractive index film.
The second described coupling film system number of plies is 13 layers, and be followed successively by from the thickness of the outside each rete of main film system: 157.6,8.9,168.9,63.9,170.1,9.1,154.6,57.5,383.3,57.5,27.3,32.7,36.0, unit is nm; In the second coupling film system, the 2nd, 4,6,8,10 layer is high refractive index film, and the 11st, 13 layer is time high refractive index film, and all the other are time low refractive index film.
A kind of twin-channel laser light source, comprising:
Binary channels dichroic mirror;
For sending the first blue laser module of the blue laser of s polarization to described binary channels dichroic mirror;
For sending the second blue laser module of the blue laser of p polarization to described binary channels dichroic mirror;
The first quarter wave plate (also claiming the first quarter-wave plate) arranged along the optical path direction of described first blue laser module and the first fluorescence dish;
The second quarter wave plate (also claiming the second quarter-wave plate) arranged along the optical path direction of described second blue laser module and the second fluorescence dish.
Further, in the utility model, the incident angle of blue laser on the binary channels dichroic film of described binary channels dichroic mirror that the described first blue laser module sends s polarization is 55 °; The incident angle of blue laser on the binary channels dichroic film of described binary channels dichroic mirror that described second blue laser module sends p polarization is 35 °.Binary channels dichroic film of the present utility model, no matter incident angle is 55 ° or 35 °, and at shortwave, blue laser wavelength district is all polarizing coating characteristic: s reflection of polarization, p polarization transmission; And in the red green fluorescence district of long wave, during incident angle 55 °, the equal transmission of s and p polarization, and during incident angle 35 °, s and p polarization all reflects.
The blue laser of the s polarization sent by the first blue laser module will all be reflected when inciding with 55 ° of angles on the binary channels dichroic film of binary channels dichroic mirror, and after through the first quarter-wave plate, change the blue laser of s polarization into circularly polarized blue laser, this circularly polarized blue laser incides the first fluorescence dish and inspires red green fluorescence, the red green fluorescence being excited out is the natural light without polarization, can pass through the binary channels dichroic film outgoing of the first quarter-wave plate and binary channels dichroic mirror, and after fluorescence excitation the blue laser of remaining circular polarization by the first glimmering CD reflection, p polarized light is changed into through after the first quarter-wave plate, thus can through the binary channels dichroic film of binary channels dichroic mirror, and the white light of a passage is synthesized together with the red green fluorescence excited by the first fluorescence dish.Meanwhile, the blue laser of the p polarization that the second blue laser module sends will be transmitted when inciding with 35 ° of angles on the binary channels dichroic film of binary channels dichroic mirror, and after through the second quarter-wave plate, change the blue laser of p polarization into circularly polarized blue laser, this circularly polarized blue laser incides the second fluorescence dish, the red green fluorescence being excited out is also the natural light without polarization, can pass through the second quarter-wave plate, and reflected by the binary channels dichroic film 5 of binary channels dichroic mirror, and the blue laser of remaining circular polarization is reflected by fluorescence dish 4 ' after fluorescence excitation, through changing s polarized light after quarter-wave plate 3 ' into, thus also can be reflected by the binary channels dichroic film of binary channels dichroic mirror 2, and the white light of another passage is synthesized together with the red green fluorescence excited by the second fluorescence dish.The white light of these two passages intersects at the first right-angle prism and the second right-angle prism, and collimates with a collimation lens.
The blue laser beam that the blue laser beam of the first blue laser module incides incident luminous point on binary channels dichroic film and the second blue laser module incides distance between the incident luminous point on binary channels dichroic film by following conditional decision: make the outgoing intersection point of two-beam be positioned at the outside of the first right-angle prism and the second right-angle prism.
A kind of projection arrangement, adopts twin-channel laser light source of the present utility model, and adopt twin-channel laser light source, its output brightness can double.
Compared with prior art, the beneficial effects of the utility model are:
The first, prior art Bian uses single channel technology, and owing to only having a laser module, output brightness is lower.And the utility model Bian twin-channel laser light source incides on binary channels dichroic film with different incidence angles and directly closes bundle, output brightness is expected to double.But this is former is not realized, mainly because the design of twin-channel dichroic film is considered to impossible.But the utility model, by block prism (the first right-angle prism and the second right-angle prism), 4 kinds of membraneous materials and two coupling film systems, achieves the high-transmission rate of different polarization states transmission bands and the high reflectance of the zone of reflections in the diametrically opposite binary channels of optical characteristics.Second, twin-channel laser light source of the present utility model has an obvious superiority relative to used single channel LASER Light Source, Here it is, when the laser lighting of one of them passage was lost efficacy, laser projection still can work on, just brightness decreases, and just can not work completely unlike single channel laser light source projection.
Accompanying drawing explanation
Fig. 1 is a kind of principle of work schematic diagram now using the LASER Light Source of single channel dichroic mirror;
Fig. 2 is the another kind of principle of work schematic diagram now using the LASER Light Source of single channel dichroic mirror;
Fig. 3 is the principle of work schematic diagram of the utility model twin-channel laser light source;
Fig. 4 is the structural representation of the utility model binary channels dichroic mirror;
Fig. 5 is the thickness of the every tunic of the utility model binary channels dichroic film and the corresponding relation figure of refractive index;
Fig. 6 is incident angle when being 55 °, and the polarization transmission of binary channels dichroic film divides light curve;
Fig. 7 is incident angle when being 35 °, and the polarization transmission of binary channels dichroic film divides light curve.
Embodiment
Fig. 1 is a kind of principle of work schematic diagram now using the LASER Light Source of single channel dichroic mirror.As shown in Figure 1, wavelength is that the blue laser beam 9 of about 460nm is with the outgoing of s polarized light, and with 45 ° of incident angles on dichroic mirror 10, after being reflected by dichroic mirror 10, incide fluorescence dish 11, through dichroic mirror 10 after being reflected by fluorescence dish 11 by the red green fluorescence of blue laser excitation; And remaining blue laser light fluorescence dish 11 after fluorescence excitation, through the extra optical systematic collection that three catoptrons and collimation lens form, finally reflected by dichroic mirror 10, synthesize white light together with the red green fluorescence through dichroic mirror 10.Used projector LASER Light Source that Here it is.Obviously, this LASER Light Source has two problems: one is the blue laser due to dichroic mirror 10 not transmission s polarization, therefore needs an extra optical system to collect blue laser; Two is that the laser power that exports is lower, and the fluorescence be excited is more weak, and display brightness is not enough.
Fig. 2 is that the another kind after improving now uses the LASER Light Source principle of work schematic diagram of single channel dichroic mirror.As shown in Figure 2, this single channel dichroic mirror LASER Light Source through improving mainly contains two changes: one is introduced a quarter-wave plate 14; Two is that dichroic mirror 13 can reflect the blue laser 12 of s polarization and the blue laser beam of transmission p polarization.These change make the blue laser beam 12 of 45 ° of incident s polarizations by dichroic mirror 13 reflect with quarter-wave plate 14 through after become circularly polarized light, after fluorescence excitation the blue laser of remaining circular polarization by fluorescence dish 15 reflect with quarter-wave plate 14 again transmission after become the blue laser of p polarization, so can through dichroic mirror 13, so just can with simultaneously through dichroic mirror 13 without the red green fluorescence synthesize white light of polarization.
The LASER Light Source of the single channel dichroic mirror through improving shown in above-mentioned Fig. 2, although eliminate the extra blue laser collection system of shown in Fig. 1, both provided cost savings, light source volume can be reduced again, reduce the complicacy debug, but Output of laser power is lower, display brightness is not enough problem that this LASER Light Source still also exists, for this reason, the utility model proposes new departure of binary channels dichroic mirror and LASER Light Source thereof.
Fig. 3 is the principle of work schematic diagram of the utility model twin-channel laser light source; Fig. 4 is the structural representation of the utility model binary channels dichroic mirror.As shown in Figure 3 and Figure 4, twin-channel laser light source, comprising: binary channels dichroic mirror 2; For sending the first blue laser module 1 of the blue laser of s polarization to binary channels dichroic mirror 2; For sending the second blue laser module 1 ' of the blue laser of p polarization to binary channels dichroic mirror 2; Along the first quarter wave plate 3 and the first fluorescence dish 4 that the reflected light path direction of the first blue laser module 1 is arranged; The second quarter wave plate 3 ' arranged along the optical path direction of the second blue laser module 1 ' and the second fluorescence dish 4 '.Binary channels dichroic mirror, comprising: the first right-angle prism 7 and the second right-angle prism 8 that inclined-plane is oppositely arranged; Be arranged on the binary channels dichroic film 5 between the first right-angle prism 7 and the second right-angle prism 8 two inclined-planes and cementing layer 6.Binary channels dichroic film 5 is arranged on the inclined-plane of the first right-angle prism 7, and the one side of cementing layer 6 is connected with binary channels dichroic film 5, and another side is connected with the inclined-plane of the second right-angle prism 8.First right-angle prism 7 and the second right-angle prism 8 equal and opposite in direction, be isosceles right-angle prism, its angle is 45 degree, 45 degree, 90 degree.First right-angle prism 7 and the second right-angle prism 8 are made up of K9 optical glass.Binary channels dichroic film 5 comprises along the first coupling film system that the first right-angle prism 7 inclined-plane outwards sets gradually, main film system and the second coupling film system, then glues together mutually with optical cement and the second right-angle prism 8 inclined-plane.First coupling film system and the second coupling film system form by high refractive index film, secondary high refractive index film and secondary low refractive index film; Main film system is made up of high refractive index film, secondary high refractive index film, secondary low refractive index film and low refractive index film.High refractive index film is TiO
2film, it is 2.385 in the refractive index of wavelength 550nm; Secondary high refractive index film is Ta
2o
5film, it is 2.11 in the refractive index of wavelength 550nm; Secondary low refractive index film is SiO
2film, it is 1.46 in the refractive index of wavelength 550nm; Low refractive index film is MgF
2film is 1.38 in the refractive index of wavelength 550nm.
The incident angle of blue laser on the binary channels dichroic film 5 of binary channels dichroic mirror 2 of the s polarization that the first blue laser module 1 sends is 55 °; The incident angle of blue laser on the binary channels dichroic film 5 of binary channels dichroic mirror 2 of the p polarization that the second blue laser module 1 ' sends is 35 °, and its polarization state is p polarized light.Binary channels dichroic film 5 of the present utility model has following peculiar optical characteristics, namely when incident angle is 55 °, to the blue laser reflection of the s polarization of wavelength about 460nm and the blue laser-transmitting of p polarization, and to red green fluorescence transmission; And when incident angle is 35 °, reflection being similarly to the blue laser of the s polarization of wavelength about 460nm, the blue laser of p polarization is similarly transmission, identical when being 55 ° with incident angle, and is reflection to red green fluorescence, contrary when being 55 ° with incident angle.
Based on said structure feature, the blue laser of the s polarization sent by blue laser module 1 will all be reflected when inciding the A point of the binary channels dichroic film 5 of binary channels dichroic mirror 2 with 55 ° of angles, and after through quarter-wave plate 3, change the blue laser of s polarization into circularly polarized blue laser, this circularly polarized blue laser incides fluorescence dish 4 and inspires red green fluorescence, the red green fluorescence being excited out is the natural light without polarization, can pass through binary channels dichroic film 5 outgoing of quarter-wave plate 3 and binary channels dichroic mirror 2, and the blue laser of remaining circular polarization is reflected by fluorescence dish 4 after fluorescence excitation, p polarized light is changed into through after quarter-wave plate 3, thus can through the binary channels dichroic film 5 of binary channels dichroic mirror 2, and the white light of a passage is synthesized together with the red green fluorescence excited by fluorescence dish 4.Meanwhile, the blue laser of the p polarization that another blue laser module 1 ' sends will be transmitted when inciding the B point of the binary channels dichroic film 5 of binary channels dichroic mirror 2 with 35 ° of angles, and after through quarter-wave plate 3 ', change the blue laser of p polarization into circularly polarized blue laser, this circularly polarized blue laser incides fluorescence dish 4 ', the red green fluorescence being excited out is also the natural light without polarization, can pass through quarter-wave plate 3 ', and reflected by the binary channels dichroic film 5 of binary channels dichroic mirror 2, and the blue laser of remaining circular polarization is reflected by fluorescence dish 4 ' after fluorescence excitation, through changing s polarized light after quarter-wave plate 3 ' into, thus also can be reflected by the binary channels dichroic film 5 of binary channels dichroic mirror 2, and the white light of another passage is synthesized together with the red green fluorescence excited by fluorescence dish 4 '.The white light of these two passages meets at F point, and collimates with a collimation lens.Distance between the incident luminous point A of blue laser module 1 on the binary channels dichroic film 5 of binary channels the dichroic mirror 2 and incident luminous point B of blue laser module 1 ' on the binary channels dichroic film 5 of binary channels dichroic mirror 2 is by following conditional decision: make the outgoing intersection point F of two passages be positioned at block prism body (first right-angle prism 7 and the second right-angle prism 8) outside.
Fig. 5 is the every thickness of tunic of the utility model binary channels dichroic film 5 and the corresponding relation figure of refractive index.Binary channels dichroic film 5 is made up of the first coupling film system set gradually, main film system and the second coupling film system, and the first coupling film system and the second coupling film system are by high refractive index film, secondary high refractive index film and secondary low refractive index film three kinds of material compositions; Main film system is made up of high refractive index film, secondary high refractive index film, secondary low refractive index film and low refractive index film four kinds of materials.High refractive index film is TiO
2film, it is 2.385 in the refractive index of wavelength 550nm; Secondary high refractive index film is Ta
2o
5film, it is 2.11 in the refractive index of wavelength 550nm; Secondary low refractive index film is SiO
2film, it is 1.46 in the refractive index of wavelength 550nm; Low refractive index film is MgF
2film is 1.38 in the refractive index of wavelength 550nm.Total number of plies of whole binary channels dichroic film is 68 layers, and gross thickness is 6834nm.The first coupling film system number of plies is 8 layers, and be followed successively by from the thickness of the first outside each rete in right-angle prism 7 inclined-plane: 283.2,11.7,60.7,143.2,70.6,40.1,91.1,49.3, unit is nm; In the first coupling film system, the 4th layer is high refractive index film, and the 2nd, 6,8 layer is time high refractive index film, and all the other are time low refractive index film.Main film is 47 layers, be followed successively by from the thickness of the first outside each rete of coupling film system: 90.7, 39.2, 65.8, 55.7, 91.3, 32.3, 117.3, 15.9, 31.7, 77.4, 43.7, 89.9, 55.3, 48.5, 53.4, 98.4, 27.3, 92.5, 20.8, 157.6, 9.4, 161.9, 88.2, 350.5, 96.6, 437.7, 87.3, 462.1, 64.2, 71.5, 101.4, 11.0, 215.7, 71.5, 138.6, 337.4, 42.4, 67.5, 149.7, 14.0, 178.8, 57.4, 5.6, 164.7, 18.5, 181.5, 60.4, unit is nm, in main film system, 2nd, 4,9,11,13,15,17,19,21,25,27,29,37,42,47 layers is high refractive index film, 6th, 23,32,34,40,43,45 layers is time high refractive index film, 3rd, 8,22,24,30,35,38 layers is time low refractive index film, and all the other are low refractive index film.The second coupling film system number of plies is 13 layers, and be followed successively by from the thickness of the outside each rete of main film system: 157.6,8.9,168.9,63.9,170.1,9.1,154.6,57.5,383.3,57.5,27.3,32.7,36.0, unit is nm; In the second coupling film system, the 2nd, 4,6,8,10 layer is high refractive index film, and the 11st, 13 layer is time high refractive index film, and all the other are time low refractive index film.
Fig. 6 and Fig. 7 be respectively incident angle 55 ° and 35 ° time binary channels dichroic film 5 polarization transmission divide light curve.As can be seen from Figures 6 and 7, no matter incident angle is 55 ° or 35 °, and at shortwave, blue laser wavelength district is all polarizing coating characteristic: s reflection of polarization, p polarization transmission; And in the red green fluorescence district of long wave, during incident angle 55 °, the equal transmission of s and p polarization, on the contrary, during incident angle 35 °, s and p polarization all reflects.This characteristic is very unusual: on the one hand, is a long wave flow-through film, and is a shortwave flow-through film to incident angle 35 ° to incident angle 55 °; On the other hand, at shortwave, blue laser wavelength district requires maximum polarization effect, and requires minimum polarization effect in long wave red green fluorescence district.Same film will possess these antipodal characteristics simultaneously, and the subversiveness of this binary channels dichroic film design that Here it is breaks through.Although the design result of p polarization red green fluorescence reflection characteristic during incident angle 35 ° is not still ideal, this can meet the requirement of actual use.Actual characteristic is: if the wavelength coverage in the blue laser wavelength district of shortwave is 440-480nm, the wavelength coverage in the red green fluorescence district of long wave is 500-660nm, then at short wavelength region and long wavelength region, average transmittance (T) or the reflectivity (R) of p and s polarization are respectively: to incident angle 55 °, short wavelength region Tp=98.2%, Rs=100%, long wavelength region Tp=98.1%, Ts=98.9%; Then to incident angle 35 °, short wavelength region Tp=97.7%, Rs=99.5%, long wavelength region Rp=93.1%, Rs=99.9%.This binary channels dichroic film 5 not only can be used for the twin-channel laser light source of laser projection device, and can be used as multichannel optical switch when suitably modulating fluorescence dish.
Claims (10)
1. a binary channels dichroic mirror, is characterized in that, comprising:
The first right-angle prism that inclined-plane is oppositely arranged and the second right-angle prism;
Be arranged on the binary channels dichroic film between described first right-angle prism and the second right-angle prism two inclined-planes and cementing layer.
2. binary channels dichroic mirror according to claim 1, it is characterized in that, described binary channels dichroic film is arranged on the inclined-plane of described first right-angle prism, and the one side of described cementing layer is connected with described binary channels dichroic film, and another side is connected with the inclined-plane of described second right-angle prism.
3. binary channels dichroic mirror according to claim 1, is characterized in that, the first described right-angle prism and the second right-angle prism equal and opposite in direction, be isosceles right-angle prism.
4. binary channels dichroic mirror according to claim 1, is characterized in that, described binary channels dichroic film comprises: on the inclined-plane of the first right-angle prism, be provided with the first coupling film system, main film system and the second coupling film system successively;
The first described coupling film system and the second coupling film system form by high refractive index film, secondary high refractive index film and secondary low refractive index film; Described main film system is made up of high refractive index film, secondary high refractive index film, secondary low refractive index film and low refractive index film; Described high refractive index film is TiO
2film, secondary high refractive index film is Ta
2o
5film, secondary low refractive index film is SiO
2film, low refractive index film is MgF
2film.
5. binary channels dichroic mirror according to claim 4, it is characterized in that, described binary channels dichroic film comprises: the first described coupling film system number of plies is 8 layers, and from the inclined-plane of the first right-angle prism, the thickness of outside each rete is followed successively by: 283.2,11.7,60.7,143.2,70.6,40.1,91.1,49.3, unit is nm; In the first coupling film system, the 4th layer is high refractive index film, and the 2nd, 6,8 layer is time high refractive index film, and all the other are time low refractive index film.
6. binary channels dichroic mirror according to claim 4, it is characterized in that, described main film is 47 layers, be followed successively by from the thickness of the first outside each rete of coupling film system: 90.7, 39.2, 65.8, 55.7, 91.3, 32.3, 117.3, 15.9, 31.7, 77.4, 43.7, 89.9, 55.3, 48.5, 53.4, 98.4, 27.3, 92.5, 20.8, 157.6, 9.4, 161.9, 88.2, 350.5, 96.6, 437.7, 87.3, 462.1, 64.2, 71.5, 101.4, 11.0, 215.7, 71.5, 138.6, 337.4, 42.4, 67.5, 149.7, 14.0, 178.8, 57.4, 5.6, 164.7, 18.5, 181.5, 60.4, unit is nm, in main film system, 2nd, 4,9,11,13,15,17,19,21,25,27,29,37,42,47 layers is high refractive index film, 6th, 23,32,34,40,43,45 layers is time high refractive index film, 3rd, 8,22,24,30,35,38 layers is time low refractive index film, and all the other are low refractive index film.
7. binary channels dichroic mirror according to claim 4, is characterized in that, the second described coupling film system number of plies is 13 layers, be followed successively by from the thickness of the outside each rete of main film system: 157.6,8.9,168.9,63.9,170.1,9.1,154.6,57.5,383.3,57.5,27.3,32.7,36.0, unit is nm; In the second coupling film system, the 2nd, 4,6,8,10 layer is high refractive index film, and the 11st, 13 layer is time high refractive index film, and all the other are time low refractive index film.
8. a projection arrangement, is characterized in that, adopt twin-channel laser light source, described twin-channel laser light source, comprising:
Binary channels dichroic mirror described in any one of claim 1 ~ 7;
For sending the first blue laser module of the blue laser of s polarization to described binary channels dichroic mirror;
For sending the second blue laser module of the blue laser of p polarization to described binary channels dichroic mirror;
The first quarter wave plate arranged along the optical path direction of described first blue laser module and the first fluorescence dish;
The second quarter wave plate arranged along the optical path direction of described second blue laser module and the second fluorescence dish.
9. projection arrangement according to claim 8, is characterized in that, the incident angle of blue laser on the binary channels dichroic film of described binary channels dichroic mirror that the described first blue laser module sends s polarization is 55 °.
10. projection arrangement according to claim 8, is characterized in that, the incident angle of blue laser on the binary channels dichroic film of described binary channels dichroic mirror that the described second blue laser module sends p polarization is 35 °.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361799A (en) * | 2019-06-28 | 2019-10-22 | 西安应用光学研究所 | A kind of dichroism medium cube Amici prism of resisting laser damage |
| CN111580212A (en) * | 2020-06-12 | 2020-08-25 | 京东方科技集团股份有限公司 | Side-in type backlight module |
| CN112630985A (en) * | 2020-12-28 | 2021-04-09 | 福建福特科光电股份有限公司 | Color separation device and color separation method of black light lens |
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- 2015-11-30 CN CN201520970634.XU patent/CN205193309U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361799A (en) * | 2019-06-28 | 2019-10-22 | 西安应用光学研究所 | A kind of dichroism medium cube Amici prism of resisting laser damage |
| CN110361799B (en) * | 2019-06-28 | 2022-08-02 | 西安应用光学研究所 | Dichroic medium cubic beam splitter prism capable of resisting laser damage |
| CN111580212A (en) * | 2020-06-12 | 2020-08-25 | 京东方科技集团股份有限公司 | Side-in type backlight module |
| CN111580212B (en) * | 2020-06-12 | 2022-03-04 | 京东方科技集团股份有限公司 | Side-in type backlight module |
| CN112630985A (en) * | 2020-12-28 | 2021-04-09 | 福建福特科光电股份有限公司 | Color separation device and color separation method of black light lens |
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