CN112130410A - Multi-color laser light source light combination device and method for LCOS (liquid Crystal on silicon) and liquid crystal display equipment - Google Patents

Abstract

The invention belongs to the field of optics, and discloses a multi-color laser light source light combination device and method for LCOS (liquid crystal on silicon) and a liquid crystal display device, wherein the multi-color laser light source device comprises more than two lasers and more than two optical components, and the more than two lasers are used for generating more than two lasers with different colors; more than two optical components are positioned in the light-emitting direction of laser generated by the laser, and one half of the optical components are arranged as polarization plates, and the other half of the optical components are arranged as half-wave plates; the polarization directions of the laser emitted by the two or more lasers are different, the polarization plate of the one or more optical components is positioned on the emergent light path of the laser for fixing the polarization direction of the laser, and the half-wave plate of the one or more optical components is positioned on the emergent light path of the laser for changing the polarization direction of the laser. The polarization state of the laser is consistent through the polarization plate or the half-wave plate, and the optical loss of the polarization plate or the half-wave plate is only the loss of the half-wave plate, so that the optical efficiency of the system is higher.

Description

Multi-color laser light source light combination device and method for LCOS (liquid Crystal on silicon) and liquid crystal display equipment

Technical Field

The invention relates to the field of optics, in particular to a method for a multi-color laser light source light-combining device of LCOS and a liquid crystal display device.

Background

LCOS is a reflective liquid crystal display technology using active lattice. The display principle of LCOS is: the incident S polarized light is reflected by the PBS and then irradiates on the LCOS display chip, when the applied voltage of a certain pixel of the liquid crystal layer is 0, the input S polarized light passes through the liquid crystal layer, the polarization direction is not deflected, the S polarized light reaches the bottom and is reflected back to output the S polarized light, the S polarized light is reflected by the PBS prism, the S polarized light returns along the original path and cannot enter a transmission light path, the light output is zero, and the pixel is in a dark state. When voltage is applied to the pixel from the outside, the input S polarized light passes through the liquid crystal layer, the polarization direction is deflected, the S polarized light reaches the bottom and is reflected back to output P polarized light, the P polarized light directly passes through the PBS prism and enters the transmission light path, and the pixel presents a bright state and forms an image on a screen.

In order to ensure that the LCOS chip works normally, the polarization states of the light irradiated on the LCOS chip must be consistent, but when a plurality of laser light sources exist, since the polarization state of the laser light emitted by each laser light source may be different, the polarization states of the laser light sources need to be changed so that all the light irradiated on the LCOS chip is consistent.

The existing LCOS chip optical path architecture generally uses PS conversion plate to make the polarization state of light consistent. The PS converter generally consists of a plurality of pieces of coated glass and a half-wave plate, and the laser passes through the plurality of pieces of coated glass and the half-wave plate, both of which have losses, resulting in low efficiency.

Disclosure of Invention

The invention aims to provide a light combining device and a light combining method for a multicolor laser light source of LCOS (liquid crystal on silicon) and a liquid crystal display device, which can not only make the polarization states of the multicolor light source incident on the LCOS consistent, but also have higher optical efficiency.

The technical scheme provided by the invention is as follows:

in one aspect, a light combining device for a multicolor laser light source of an LCOS includes:

more than two lasers for generating more than two lasers with different colors;

the optical components are arranged in one-to-one correspondence with the lasers and positioned in the light emitting direction of laser light generated by the lasers, and one half of the optical components is set as a polarization plate, and the other half of the optical components is set as a half-wave plate;

the polarization direction of the laser that two more the laser instrument sent is different, more than one the polarization piece of optical component is located on the emergent light way that the laser instrument produced laser for the polarization direction of fixed laser, more than one the half wave plate of optical component is located on the emergent light way that the laser instrument produced laser, is used for changing the polarization direction of laser.

In the scheme, a polarization plate or a half-wave plate is used behind a multicolor laser light source, so that the output polarization states of multicolor lasers are consistent, optical damage is small, and optical efficiency is high; in addition, the adoption of the multicolor laser light source leads to larger color gamut.

Further preferably, the method further comprises the following steps:

the compound eye lens group is arranged in the light emergent direction of the optical component.

In the scheme, the compound eye lens group is arranged, so that light can be more uniform.

Further preferably, the compound eye lens group includes a plurality of compound eye lenses arranged in parallel along the transmission direction of the laser light.

Further preferably, the method further comprises the following steps:

and the PBS prism is arranged in the light emergent direction of the compound eye lens group and used for reflecting the laser emitted by the compound eye lens group onto the LCOS chip.

Further preferably, the number of the lasers is two, and the lasers are respectively a first laser and a second laser, the first laser generates S-wave polarized blue laser, and the second laser generates P-wave polarized red laser;

the number of the optical components is two, the optical components are respectively a first optical component and a second optical component, the polarization plate of the first optical component is positioned on the emergent light path of the first laser for generating laser, and the half-wave plate of the second optical component is positioned on the emergent light path of the second laser for generating laser.

Further preferably, the number of the lasers is three, and the lasers are respectively a first laser, a second laser and a third laser, the first laser generates S-wave polarized blue laser, the second laser generates P-wave polarized red laser, and the third laser generates S-wave polarized green laser;

the number of the optical components is three, and the optical components are respectively a first optical component, a second optical component and a third optical component; the polarization plate of the first optical component is positioned on the emergent light path of the first laser for generating laser, the half-wave plate of the second optical component is positioned on the emergent light path of the second laser for generating laser, and the polarization plate of the third optical component is positioned on the emergent light path of the third laser for generating laser.

Further preferably, the polarization plate and the half-wave plate are both formed by plating a film on glass or quartz.

On the other hand, a method for combining light of a multicolor laser light source of an LCOS is also provided, which is applied to the device for combining light of a multicolor laser light source of an LCOS, and comprises the following steps:

generating more than two lasers with different colors by more than two lasers;

according to the polarization state of the laser light generated by the laser, the polarization direction of the laser light is fixed by a polarization plate positioned in the light outgoing direction of the laser light in the optical component or is changed by a half-wave plate positioned in the light outgoing direction of the laser light in the optical component, so that the polarization direction of the laser light is consistent with the polarization direction of the laser light generated by another laser.

In another aspect, a liquid crystal display device is further provided, which includes an LCOS chip and the above-mentioned multi-color laser light source light combining device for an LCOS, where the multi-color laser light source light combining device for an LCOS provides a light source for the LCOS chip, so as to form an image on a screen.

The invention has the technical effects that: the polarization states of laser of multiple colors output by the multicolor laser light source are consistent through the optical component with half set as the polarization plate and half set as the half-wave plate, when the polarization direction of the laser is changed, the laser only passes through the half-wave plate, the optical loss of the laser is only the loss of the half-wave plate, and compared with the existing PS conversion plate, the optical loss of the laser passing through the multilayer glass is reduced, so that the optical efficiency of the system is higher, and the volume is smaller.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic diagram of an embodiment of a light combining device for a LCOS multi-color laser light source according to the present invention;

FIG. 2 is a schematic diagram of another embodiment of a light combining device for a LCOS multi-color laser light source according to the present invention;

fig. 3 is a schematic view of the structure of the optical member of the present invention.

The reference numbers illustrate:

1. a laser; 11. a first laser; 12. a second laser; 13. a third laser; 2. an optical member; 201. a polarizing plate; 202. a half-wave plate; 21. a first optical member; 22. a second optical member; 23. a third optical member; 3. a compound eye lens group; 4. a PBS prism; 5. LCOS chip.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

The present invention provides an embodiment of a light combining device for a multi-color laser light source of an LCOS, as shown in fig. 1 and 3, including two or more lasers 1 and two or more optical components 2. Two or more lasers 1 are used to generate laser light of two or more different colors, i.e. each laser 1 generates laser light of one color.

More than two optical components 2 and more than two lasers 1 are arranged in a one-to-one correspondence manner, and are located in the light emitting direction of the lasers 1 generating laser light, each laser 1 corresponds to one optical component 2, half of the optical components 2 are arranged to be polarization plates 201, and the other half of the optical components are arranged to be half-wave plates 202. Both the polarizer 201 and the half-wave plate 202 are formed by plating a film on glass or quartz, that is, half the polarizer 201 is formed on one piece of quartz or glass, half the birefringent multilayer film of the columnar structure is plated, and then a protective layer or an anti-reflection layer is provided on the birefringent multilayer film of the columnar structure to form the half-wave plate 202.

When the polarization directions of the laser beams emitted by the two or more lasers 1 are different, the polarization plate 201 of the one or more optical components 2 is positioned on the emitting light path of the laser beams generated by the lasers 1 and used for fixing the polarization direction of the laser beams, and the half-wave plate 202 of the one or more optical components 2 is positioned on the emitting light path of the laser beams generated by the lasers 1 and used for changing the polarization direction of the laser beams.

By providing lasers of a plurality of colors, the color gamut of the laser light reflected onto the LCOS chip 5 can be made larger. Since the laser light source device includes a plurality of lasers 1, the polarization direction of the laser light emitted from each laser 1 may be different, and therefore, the polarization direction of the laser light emitted from each laser 1 needs to be adjusted to be the same, and then the laser light is incident on the LCOS chip 5.

An optical component 2 is disposed in the light outgoing direction of each laser 1, as shown in fig. 3, half of the optical component 2 is set as a polarization plate 201, and half is set as a half-wave plate 202, and in actual use, it is determined according to the polarization direction of the laser light generated by the laser 1 and the finally required polarization direction of the laser light that the laser 1 emits is incident on the polarization plate 201 of the optical component 2 or the half-wave plate 202 of the optical component 2, the polarization direction of the laser light is fixed by the polarization plate 201, that is, if the polarization direction of the laser light generated by the laser 1 is the same as the finally required polarization direction of the laser light, the laser light is incident on the polarization plate 201, if the polarization direction of the laser light generated by the laser 1 is different from the finally required polarization direction of the laser light, the laser light is incident on the half-wave plate 202, the polarization direction of the laser light is changed by the half-wave plate, the laser light of the uniform polarization state is then incident on the LCOS chip 5.

In the scheme, the polarization states of laser lights of multiple colors output by the multicolor laser light source are consistent through the optical component 2 with half of the polarization plate 201 and half of the polarization plate 202, when the polarization direction of the laser 1 is changed, the laser light only passes through the half-wave plate 202, the loss of the laser light is only the loss of the half-wave plate 202, and compared with a PS conversion plate, the loss of multilayer glass is reduced, so that the optical efficiency of the system is higher, and the volume is smaller.

In one example, as shown in fig. 1, the number of the lasers 1 is two, and the lasers are respectively a first laser 11 and a second laser 12, a first optical component 21 is arranged on the light emitting direction of the first laser 11, and a second optical component 22 is arranged on the light emitting direction of the second laser 12. The first laser 11 generates S-wave polarized blue laser light, and the second laser 12 generates P-wave polarized red laser light; the polarization directions of the laser light generated by the first laser 11 and the second laser 12 are different, and it is necessary to convert P-wave polarized red laser light generated by the second laser 12 into S-wave polarized laser light or convert S-wave polarized blue laser light generated by the first laser 11 into P-wave polarized laser light.

If the polarization of the P wave generated by the second laser 12 is converted into the polarization of the S wave, and the polarization direction of the laser light of the first laser 11 is not changed, the polarization plate 201 of the first optical member 21 is disposed on the light path from the first laser 11 to the laser light, the laser light generated by the first laser 11 is incident on the polarization plate 201 of the first optical member 21, the polarization direction of the laser light generated by the first laser 11 is fixed by the polarization plate 201, that is, the transverse polarization is absorbed, only the polarization in the vertical direction is retained, and the laser light generated by the first laser 11 is still the S-polarized light after passing through the polarization plate 201 on the first optical member 21.

The half-wave plate 202 of the second optical component 22 is disposed on the outgoing light path of the laser generated by the second laser 12, the half-wave plate 202 can generate x/2 phase shift, the polarization direction is rotated by 90 °, the laser generated by the second laser 12 is incident on the half-wave plate 202 of the second optical component 22, the laser passes through the half-wave plate 202 and becomes S-polarized light, that is, the laser output by the first laser 11 and the laser output by the second laser 12 both become S-polarized light, and the polarization states are the same.

If the S-wave polarization generated by the first laser 11 is converted into the P-wave polarization and the polarization direction of the laser light of the second laser 12 is not changed, the half-wave plate 202 of the first optical member 21 is disposed on the path of the laser light emitted from the first laser 11, the laser light generated by the first laser 11 is incident on the half-wave plate 202 of the first optical member 21, and the laser light generated by the first laser 11 is converted into the P-wave polarization after passing through the half-wave plate 202 of the first optical member 21. The polarization plate 201 of the second optical component 22 is disposed on the exit path of the laser generated by the second laser 12, so that the laser generated by the second laser 12 is incident on the polarization plate 201 of the second optical component 22, and the laser is still P-wave polarized after passing through the polarization plate 201, and thus the polarization states of the laser output by the first laser 11 and the laser output by the second laser 12 are the same and are both P-wave polarized.

In another example, as shown in fig. 2, the number of lasers 1 is three, and the lasers are a first laser 11, a second laser 12, and a third laser 13, respectively, the first laser 11 generates S-wave polarized blue laser light, the second laser 12 generates P-wave polarized red laser light, and the third laser 13 generates S-wave polarized green laser light. The laser light that is ultimately incident on the LCOS chip 5 is required to be S-polarized light.

The number of the optical members 2 is three, and the optical members are respectively a first optical member 21, a second optical member 22 and a third optical member 23; the polarization plate 201 of the first optical component 21 is located on the outgoing light path of the laser light generated by the first laser 11, and the polarization direction of the laser light generated by the first laser 11 is still S-wave polarization after passing through the polarization plate 201. The half-wave plate 202 of the second optical component 22 is located on the outgoing light path of the laser light generated by the second laser 12, and the polarization direction of the laser light generated by the second laser 12 changes after passing through the half-wave plate 202, and also becomes S-wave polarization. The polarization plate 201 of the third optical component 23 is located on the outgoing light path of the laser light generated by the third laser 13, and the polarization direction of the laser light generated by the third laser 13 is still S-wave polarization after passing through the polarization plate 201. That is, after the laser light generated by the first laser 11, the second laser 12 and the third laser 13 passes through the polarization plate 201 or the half-wave plate 202 on the corresponding optical component 2, the polarization directions of the laser light of all the different colors are consistent.

In another embodiment of the present invention, on the basis of the above embodiments, the light combining device for a LCOS multicolor laser light source further includes a compound eye lens set 3 and a PBS prism 4, where the compound eye lens set 3 is disposed in the light outgoing direction of the optical component 2. The PBS prism 4 is disposed in the light exit direction of the fly eye lens group 3, and is configured to reflect the laser light emitted from the fly eye lens group 3 onto the LCOS chip 5. The laser beams emitted from the plurality of optical parts 2 pass through the fly's eye lens group 3 to be more uniform. The fly eye lens group 3 includes a plurality of fly eye lenses arranged in parallel along the transmission direction of the laser light.

The S polarized light emitted from the compound eye lens group 3 is reflected by the PBS prism 4 and then irradiates on the LCOS chip 5, when the applied voltage of a certain pixel of the liquid crystal layer is 0, the input S polarized light passes through the liquid crystal layer, the polarization direction is not deflected, the S polarized light reaches the bottom and is reflected back to output the S polarized light, the S polarized light is reflected by the PBS prism 4, the S polarized light returns in the original path and cannot enter a transmission light path, the light output is zero, and the pixel is in a dark state. When voltage is applied to the pixel from the outside, the input S polarized light passes through the liquid crystal layer, the polarization direction is deflected, the S polarized light reaches the bottom and is reflected back to output P polarized light, the P polarized light directly passes through the PBS prism 4 and enters the transmission light path, and the pixel presents a bright state and forms an image on a screen.

The invention also provides a light combination method of the multicolor laser light source for the LCOS, which is characterized in that the light combination method is applied to the multicolor laser light source light combination device for the LCOS and comprises the following steps:

generating more than two lasers with different colors by more than two lasers;

according to the polarization state of the laser light generated by the laser, the polarization direction of the laser light is fixed by a polarization plate positioned in the light outgoing direction of the laser light in the optical component or is changed by a half-wave plate positioned in the light outgoing direction of the laser light in the optical component, so that the polarization direction of the laser light is consistent with the polarization direction of the laser light generated by another laser.

Specifically, as shown in fig. 1 and fig. 3, the LCOS multi-color laser light source light combining device includes two or more lasers 1 and two or more optical components 2.

In one example, as shown in fig. 1, when the number of the lasers 1 is two, the lasers are respectively a first laser 11 and a second laser 12, a first optical component 21 is arranged on the light emitting direction of the first laser 11, and a second optical component 22 is arranged on the light emitting direction of the second laser 12.

The first laser 11 generates S-wave polarized blue laser light to be incident along the light emitting direction, and the polarization direction of the laser light is not changed when the blue laser light passes through the first optical component 21, if the second laser 12 generates P-wave polarized red laser light; the polarization directions of the laser light generated by the first laser 11 and the second laser 12 are different, and it is necessary to convert P-wave polarized red laser light generated by the second laser 12 into S-wave polarized laser light or convert S-wave polarized blue laser light generated by the first laser 11 into P-wave polarized laser light.

If the polarization of the P wave generated by the second laser 12 is converted into the polarization of the S wave, and the polarization direction of the laser light of the first laser 11 is not changed, the polarization plate 201 of the first optical member 21 is disposed on the light path from the first laser 11 to the laser light, the laser light generated by the first laser 11 is incident on the polarization plate 201 of the first optical member 21, the polarization direction of the laser light generated by the first laser 11 is fixed by the polarization plate 201, that is, the transverse polarization is absorbed, only the polarization in the vertical direction is retained, and the laser light generated by the first laser 11 is still the S-polarized light after passing through the polarization plate 201 on the first optical member 21.

The half-wave plate 202 of the second optical component 22 is disposed on the outgoing light path of the laser generated by the second laser 12, the half-wave plate 202 can generate x/2 phase shift, the polarization direction is rotated by 90 °, the laser generated by the second laser 12 is incident on the half-wave plate 202 of the second optical component 22, the laser passes through the half-wave plate 202 and becomes S-polarized light, that is, the laser output by the first laser 11 and the laser output by the second laser 12 both become S-polarized light, and the polarization states are the same.

If the S-wave polarization generated by the first laser 11 is converted into the P-wave polarization and the polarization direction of the laser light of the second laser 12 is not changed, the half-wave plate 202 of the first optical member 21 is disposed on the path of the laser light emitted from the first laser 11, the laser light generated by the first laser 11 is incident on the half-wave plate 202 of the first optical member 21, and the laser light generated by the first laser 11 is converted into the P-wave polarization after passing through the half-wave plate 202 of the first optical member 21. The polarization plate 201 of the second optical component 22 is disposed on the exit path of the laser generated by the second laser 12, so that the laser generated by the second laser 12 is incident on the polarization plate 201 of the second optical component 22, and the laser is still P-wave polarized after passing through the polarization plate 201, and thus the polarization states of the laser output by the first laser 11 and the laser output by the second laser 12 are the same and are both P-wave polarized.

In this embodiment, a half-wave plate is formed by plating, and as the polarizing plate in the present invention, the polarization states of the laser lights of different colors emitted from the laser are made the same by the half-wave plate, and meanwhile, in this embodiment, the incident angle of the laser light is in the range of 0 to 20 °.

In this embodiment, for laser beams with different polarization states, the polarization states of the laser beams can be kept consistent under various scenes by simply adjusting or replacing the specific structure of the optical element.

The invention also provides a liquid crystal display device, which comprises an LCOS chip 5 and the multi-color laser light source light combining device for the LCOS of any embodiment, wherein the multi-color laser light source light combining device for the LCOS provides a light source for the LCOS chip 5, and the light source is used for imaging on a screen.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A light combining device for a multicolor laser light source of an LCOS, comprising:

more than two lasers for generating more than two lasers with different colors;

the optical components are arranged in one-to-one correspondence with the lasers and positioned in the light emitting direction of laser light generated by the lasers, and one half of the optical components is set as a polarization plate, and the other half of the optical components is set as a half-wave plate;

the polarization directions of the laser emitted by the two or more lasers are different, the polarization plate of the one or more optical components is positioned on the emergent light path of the laser for fixing the polarization direction of the laser, and the half-wave plate of the one or more optical components is positioned on the emergent light path of the laser for changing the polarization direction of the laser.

2. A multi-color laser light source light combining device for an LCOS as claimed in claim 1, further comprising:

the compound eye lens group is arranged in the light emergent direction of the optical component.

3. A multi-color laser light source light combining device for LCOS according to claim 2,

the compound eye lens group comprises a plurality of compound eye lenses which are arranged in parallel along the transmission direction of the laser.

4. A multi-color laser light source light combining device for an LCOS as claimed in claim 2, further comprising:

and the PBS prism is arranged in the light emergent direction of the compound eye lens group and used for reflecting the laser emitted by the compound eye lens group onto the LCOS chip.

5. A multi-color laser light source light combining device for LCOS according to claim 1,

the number of the lasers is two, the lasers are respectively a first laser and a second laser, the first laser generates S-wave polarized blue laser, and the second laser generates P-wave polarized red laser;

the number of the optical components is two, the optical components are respectively a first optical component and a second optical component, the polarization plate of the first optical component is positioned on the emergent light path of the first laser for generating laser, and the half-wave plate of the second optical component is positioned on the emergent light path of the second laser for generating laser.

6. A multi-color laser light source light combining device for LCOS according to claim 1,

the laser device comprises three lasers, namely a first laser device, a second laser device and a third laser device, wherein the first laser device generates S-wave polarized blue laser, the second laser device generates P-wave polarized red laser, and the third laser device generates S-wave polarized green laser;

the number of the optical components is three, and the optical components are respectively a first optical component, a second optical component and a third optical component; the polarization plate of the first optical component is positioned on the emergent light path of the first laser for generating laser, the half-wave plate of the second optical component is positioned on the emergent light path of the second laser for generating laser, and the polarization plate of the third optical component is positioned on the emergent light path of the third laser for generating laser.

7. A multi-color laser light source light combining device for LCOS according to claim 1,

the polarization plate is formed by plating a polarization film on one half of the optical member;

the half-wave plate is formed by plating a birefringent multilayer film of a columnar structure on one half of the optical member, and providing a protective layer or an antireflection layer on the birefringent multilayer film of the columnar structure.

8. A method for combining light of a multicolor laser light source of an LCOS is applied to the device for combining light of a multicolor laser light source of an LCOS according to any one of claims 1 to 7, and comprises the following steps:

generating more than two lasers with different colors by more than two lasers;

according to the polarization state of the laser light generated by the laser, the polarization direction of the laser light is fixed by a polarization plate positioned in the light outgoing direction of the laser light in the optical component or is changed by a half-wave plate positioned in the light outgoing direction of the laser light in the optical component, so that the polarization direction of the laser light is consistent with the polarization direction of the laser light generated by another laser.

9. Liquid crystal display device, characterized in that it comprises an LCOS chip and a multi-color laser light source light-combining device for LCOS according to any one of claims 1 to 7, which provides a light source for said LCOS chip for imaging on a screen.

Images