WO2020259618A1 - Optical assembly, optical machine assembly and display device - Google Patents

Abstract

An optical assembly (220), an optical machine assembly (200) comprising the optical assembly (220) and a display device (10). The optical assembly (220) comprises a first fly-eye lens (231), a second fly-eye lens (232), a polarization converter (233), and a frame (221). The frame (221) has a first surface (221a) and a second surface (221b) spaced from each other, as well as a light beam channel (c) penetrating through the first surface (221a) and the second surface (221b). The frame (221) is sequentially provided with a first groove (c1) for receiving the first fly-eye lens (231), a second groove (c2) for receiving the second fly-eye lens (232), and a third groove (c3) for receiving the polarization converter (233) in the direction from the first surface (221a) to the second surface (221b). The optical assembly (220) further comprises a first fixing mechanism, a second fixing mechanism and a third fixing mechanism which are used for matching the first groove (c1), the second groove (c2), and the third groove (c3) respectively to fix the first fly-eye lens (231), the second fly-eye lens (232), and the polarization converter (233).

Description

Optical components, optomechanical components and display equipment Technical field

The present invention relates to the field of display technology, and in particular to an optical component, an opto-mechanical component and a display device.

Background technique

This section is intended to provide background or context for the specific embodiments of the invention stated in the claims. The description here is not recognized as prior art just because it is included in this section.

Polarization conversion devices are widely used in projection equipment as optical elements with polarization conversion functions. When polarization conversion devices, double compound eyes, and gratings are used in conjunction with each other, they are generally compact and require high relative position accuracy. In this way, the slight deflection of the relative position of the components may affect the output brightness and chromatic aberration of the optical path in a large range. The high-precision positioning, installation and fastening of the above-mentioned optical components in a narrow space are very important.

Summary of the invention

The first aspect of the present invention provides an optical assembly,

It includes a first fly-eye lens, a second fly-eye lens, a polarization conversion device, and a frame. The frame has a first surface and a second surface spaced apart from each other, and a beam channel penetrating the first surface and the second surface. The frame is successively provided along the direction from the first surface to the second surface:

A first groove for accommodating the first compound eye lens;

A second groove for accommodating the second fly-eye lens; and

The third groove is used to house the polarization conversion device;

The optical assembly further includes a first fixing mechanism, a second fixing mechanism, and a third fixing mechanism. The first fixing mechanism, the second fixing mechanism, and the third fixing mechanism are used to connect to the first concave The groove, the second groove, and the third groove cooperate to fix the first fly-eye lens, the second fly-eye lens, and the polarization conversion device.

Further, the frame further includes an airflow channel penetrating through the top and bottom of the frame, the airflow channel is arranged between the first fly-eye lens and the second fly-eye lens, and the bottom plate of the upper pressing plate is provided with A vent hole is provided corresponding to the air flow channel.

A second aspect of the present invention provides an optical machine assembly, including an optical machine housing, a fan assembly, and the above-mentioned optical assembly. The fan assembly is arranged corresponding to the polarization conversion device, and the airflow generated by the fan assembly flows through the Polarization conversion device surface.

A third aspect of the present invention provides an optical machine assembly, including an optical machine housing, a fan assembly, and the above-mentioned optical assembly. The fan assembly is arranged corresponding to the polarization conversion device, and the light exit surface of the polarization conversion device is perpendicular to the polarization conversion device. On the bottom wall of the optical chassis, a part of the air flow generated by the fan assembly sequentially flows through the light exit surface of the polarization conversion device, the bottom wall of the optical chassis, and the air flow channel flows back from the vent to the Fan assembly.

The fourth aspect of the present invention provides a display device including the above-mentioned opto-mechanical assembly.

In the optical assembly, the opto-mechanical assembly, and the display device provided by the present invention, the frame includes a first groove and a second groove for accommodating the first fly-eye lens, the second fly-eye lens, and the third fly-eye lens. The groove and the third groove are respectively matched with the first groove, the second groove and the third groove through the first fixing mechanism, the second fixing mechanism and the third fixing mechanism to fix the The first fly-eye lens, the second fly-eye lens, and the third fly-eye lens, so as to avoid the coordinated positioning of the plurality of optical elements (the first fly-eye lens, the second fly-eye lens, and the The polarization converter) causes the phenomenon of increasing assembly errors, and effectively improves the installation accuracy of each optical element, thereby ensuring the display picture quality of the optomechanical assembly including the optical assembly and the display device with the optomechanical assembly.

Description of the drawings

In order to explain the technical solutions of the embodiments/modes of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments/modes. Obviously, the drawings in the following description are some embodiments of the present invention. /Method: For those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings.

Fig. 1 is a schematic structural diagram of a display device provided by the present invention.

FIG. 2 is a schematic diagram of the three-dimensional structure of the optical-mechanical assembly provided by the present invention.

3 is a schematic diagram of the three-dimensional structure of the optical assembly shown in FIG. 2.

4 is a schematic cross-sectional view of the optical assembly shown in FIG. 3 along the line IV-IV.

FIG. 5A is a schematic diagram of an exploded structure of the optical assembly shown in FIG. 2.

FIG. 5B is an exploded structural schematic diagram of the optical assembly shown in FIG. 2 from another angle.

FIG. 6 is a schematic diagram of the three-dimensional structure of the frame shown in FIG. 5A.

FIG. 7 is a schematic diagram of the three-dimensional structure of the optical assembly shown in FIG. 3 after removing the first pressing sheet.

Fig. 8 is a schematic diagram of the three-dimensional structure of the frame shown in Fig. 5B.

9 is a schematic diagram of the three-dimensional structure of the optical component shown in FIG. 3 after removing the third pressing sheet.

Fig. 10 is a schematic cross-sectional view of the optical assembly of Fig. 9 taken along line X-X.

FIG. 11 is a three-dimensional schematic diagram of the optical assembly shown in FIG. 3 with the polarization conversion device removed from another angle.

FIG. 12 is a schematic diagram of the relative positional relationship of some components in the optical machine assembly shown in FIG. 2.

FIG. 13 is a schematic diagram of the three-dimensional structure of the fan assembly shown in FIG. 2.

Fig. 14 is an exploded structural diagram of the fan assembly shown in Fig. 13.

Symbol description of main components

display screen	10
Light source system	100a
Optical machine system	200a

Opto-mechanical components	200
Light chassis	210
First fin	211
Second fin	212
Optical components	220
frame	221
First surface	221a
Second surface	221b
First side	221g
Clear hole	h1, h2, h3, h7
Top wall	221c
Bottom wall	221d, 210b
Sidewall	221e, 221f
Bottom wall	c11, c31
Sidewall	c12, c32
Boss	b
Groove	p2, p3
Beam channel	c
Airflow channel	d
First protrusion	222
Third protrusion	222a
First press	223
First border	2231
First shrapnel	2233
Connection part	2233a, 2241, 2253a, 2282a
First Resisting Department	2233b
Second shrapnel	2235
First fixed part	2234
The first installation part	2236
The first mounting hole	h4
Lateral compression	224
Second Resisting Department	2242
Raster	225
Ontology	2251
Second protrusion	2252
Second mounting hole	h5
Third shrapnel	2253
Third Resisting Department	2253b
Second press	226

Bending part	2261
Upper side press	227
Bottom plate	2271
The first pressing part	2272
Second pressing part	2273
Second installation part	2274
Third mounting hole	h6
Vent	h8
Third press	228
Second border	2281
Fourth shrapnel	2282
Third Resisting Department	2282b
Side panel	2283
Fifth shrapnel	2284
Third installation part	2285
Second fixed part	2286
Fourth protrusion	222b
Fourth mounting hole	h11
First groove	c1
Second groove	c2
Third groove	c3
The first compound eye lens	231
First light incident surface	231a
First light-emitting surface	231b
First side wall	231c, 231d, 231e, 231f
Second fly eye lens	232
Second light incident surface	232a
Second light-emitting surface	232b
Second side wall	232c, 232d, 232e, 232f
Polarization conversion device	233
Third light-incident surface	233a
Third light-emitting surface	233b
Third side wall	233c, 233d, 233e, 233f
Fan assembly	250
Screw	251, 259
Light barrier	252
fan	253
Third flexible body	254
Base	255

Boss	2551
First flexible body	256
Second flexible body	257
Crimping board	258
wire	L
Free end	L2
Gap	x
First threading hole	h10
Second threading hole	h9

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

In order to be able to understand the above-mentioned objects, features and advantages of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the following description, many specific details are explained in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

The present invention provides an optical assembly, wherein the frame includes a first groove, a second groove, and a third groove for accommodating a first fly-eye lens, a second fly-eye lens, and a third fly-eye lens, and passes through the first A fixing mechanism, a second fixing mechanism, and a third fixing mechanism respectively fix the first fly-eye lens, the second fly-eye lens, and the third fly-eye lens, so as to avoid the coordinated positioning of the plurality of structural members. The optical components (the first fly-eye lens, the second fly-eye lens, and the polarization converter) cause the phenomenon of increasing assembly errors, effectively improving the installation accuracy of each optical element, thereby ensuring that the optical machine assembly including the optical assembly and the optical The display quality of the display device of the computer component. The invention also provides an opto-mechanical component including the optical component and a display device having the optical-mechanical component. The display device provided by the present invention can be a theater projector, an engineering projector, a tutoring projector and other products.

Please refer to FIG. 1, the display device 10 includes a light source system 100 a and an optical machine system 200 a. The light source system 100a is used to emit illuminating light. The illuminating light may be white light or include multiple primary color lights periodically emitted. For example, in one embodiment, the illuminating light may include periodically emitted red-green-blue primary colors. The illumination light may include at least one of laser light and fluorescent light. The optical-mechanical system 200a is used to modulate the illumination light according to the input image data, so as to obtain an image to be displayed with a light-dark distribution.

The optical-mechanical system 200a includes a light modulating device, an optical-mechanical assembly 200, a projection lens and other necessary optical elements. Among them, the optical-mechanical system 200a includes at least one optical modulation device. When the optical machine system 200a includes multiple light modulation devices, the optical machine system 200a is also provided with a total internal reflection prism. The illumination light is guided by at least one total internal reflection prism and enters the corresponding light modulation device. The emitted modulated illumination light is modulated light, and the modulated light emitted by a plurality of light modulating devices is guided by a total internal reflection prism to be transmitted along the same optical path, and passes through the projection lens to form a display image.

Referring to FIG. 2, the optical machine assembly 200 includes an optical machine housing 210, an optical assembly 220 and a fan assembly 250 housed in the optical machine housing 210, and the optical machine housing 210 is also used to house the aforementioned light modulation device and total internal reflection. The prism and the projection lens are connected to the light exit channel of the optical chassis 210. Among them, the optical component 220 is used to guide the illumination light and perform processing such as shaping and polarization conversion of the illumination light. The fan assembly 250 is used to dissipate the heat of the optical assembly 220 to reduce the effect of high temperature on the function and service life of the optical assembly 220.

Further, referring to FIGS. 3-5, the optical assembly 220 includes a frame 221, a first fly-eye lens 231, a second fly-eye lens 232, and a polarization conversion device 233 housed in the frame 221. The frame 221 is provided with a first groove, a second groove, and a third groove, which are used to limit the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233 contained therein, so as to avoid The phenomenon of increasing assembly errors caused by the coordinated positioning of multiple structural parts occurs, and the installation accuracy of each optical element is effectively improved, thereby ensuring the display image quality of the display device including the optical-mechanical assembly 200 with the optical assembly. The optical assembly 220 also includes a first fixing mechanism, a second fixing mechanism, and a third fixing mechanism for fixing the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233 to the frame 221, respectively, so as to prevent a A fly-eye lens 231, a second fly-eye lens 232, and a polarization conversion device 233 shake relative to the frame 221.

The first fly-eye lens 231 and the second fly-eye lens 232 are combined to form a double fly-eye lens. The second fly-eye lens 232 is arranged at the focal length of the first fly-eye lens 231, so that each lens unit in the first fly-eye lens 231 emits a beam The illuminating light is focused on a lens unit corresponding to the second fly-eye lens 232. After the illuminating light is shaped by the first fly-eye lens 231 and the second fly-eye lens 232, the divergence angle of the illuminating light is enlarged, and the beam of the illuminating light is uniform Degree has also been improved. The distance between the polarization conversion device 233 and the second fly-eye lens 232 is relatively short. In one embodiment, the distance between the third light-incident surface 233a of the polarization conversion device 233 and the second light-emitting surface 232b of the second fly-eye lens 232 is 1mm, the polarization conversion device 233 is used to receive the illuminating light with a larger spot and higher uniformity emitted by the second fly-eye lens 232, and convert the incident illuminating light into illuminating light with the same polarization state for emission. The polarization conversion device 233 may be Polarizing conversion system (PCS, polarizing conversion system) or polarization beam splitter (PBS, polarization beam splitter).

As shown in FIGS. 4-5, the frame 221 is provided with a first surface 221a and a second surface 221b spaced apart from each other, and a beam channel c passing through the first surface 221a and the second surface 221b. In this embodiment, the frame 221 is a hollow rectangular parallelepiped, the first surface 221a is the light incident side surface of the frame 221, and the second surface 221b is the light exit side surface of the frame 221. In this embodiment, the first surface 221a is a square frame. A light-through hole h1 is formed and the second surface 221b is square-shaped and a light-through hole h2 is formed. The first surface 221a is opposite to the second surface 221b. The beam channel c is in a straight strip shape and communicates with the light hole h1 and the light hole h2. The illumination light is guided by the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233 in the beam channel c to be transmitted along a straight line.

In other embodiments, the shape of the frame 221 is not limited to a rectangular parallelepiped, such as an irregular shape. The first surface 221a and the second surface 221b are not limited to the relative arrangement relationship. Accordingly, the beam channel c includes a bent section, namely When the illuminating light is transmitted in the beam channel c, it is guided by the corresponding optical element in the bent section, and the light path will be deflected.

As shown in FIG. 4, the direction from the first surface 221a to the second surface 221b is defined as the first direction, and the opposite direction of the first direction is defined as the second direction. The beam channel c is sequentially provided with a first groove c1, a second groove c2, and a third groove c3 along the first direction. The first groove c1 is used to house the first fly-eye lens 231; the second groove c2 is used to house the second fly-eye lens 232; the third groove c3 is used to house the polarization conversion device 233.

Further, referring to FIG. 6 in conjunction with FIG. 5A and FIG. 5B, the frame 221 includes a top wall 221c and a bottom wall 221d disposed oppositely, and side walls 221e and 221f disposed oppositely. The first surface 221a of the frame 221 is recessed toward the inside of the frame 221 to form a first groove c1. The first groove c1 includes a bottom wall c11 and a side wall c12, the bottom wall c11 is adjacent to the first surface 221a, and the bottom wall c11 and the side wall c12 vertical.

As shown in FIGS. 5A and 5B, the first fly-eye lens 231 has a plate shape, and includes a first light-incident surface 231a, a first light-emitting surface 231b, and first side walls 231c, 231d, 231e, 231f, and a first light-incident surface 231a For receiving the illumination light emitted by the light source system 100a (Figure 1), a plurality of lens units are provided on the first light-emitting surface 231b and used for emitting the illumination light, each lens unit is a plano-convex lens, and each lens unit is used to converge a beam Illumination light. The first side walls 231c, 231d, 231e, and 231f are connected between the first light-incident surface 231a and the first light-emitting surface 231b.

Please refer to FIG. 7 in conjunction with FIG. 4, FIG. 5A, FIG. 5B, and 6, after the first fly-eye lens 231 is received in the first groove c1, the first side walls 231c, 231d, and 231f are all received in the first groove c1 And offset against the bottom wall c11, the edge portion of the first light-emitting surface 231b offsets against the side wall c12 (Figure 4), the side wall c12 and the bottom wall c11 define the boundary of the first groove c1, and the first fly-eye lens 231 Limit.

Referring to FIG. 8, the second surface 221b of the frame 221 is formed with a third groove c3 recessed toward the inside of the frame 221. The third groove c3 includes a side wall c32 and a bottom wall c31. The bottom wall c31 is connected to the second surface 221b. The wall c31 is vertically connected to the side wall c32.

As shown in FIGS. 5A and 5B, the polarization conversion device 233 is in the shape of a plate, and includes a third light-incident surface 233a, a third light-emitting surface 233b, and third side walls 233c, 233d, 233e, and 233f. The third light-incident surface 233a is used for To receive the illumination light emitted by the second fly-eye lens 232, the third light-emitting surface 233b is used to emit illumination light of a single polarization state. The third side walls 233c, 233d, 233e, and 233f are connected between the third light-incident surface 233a and the third light-emitting surface 233b.

Please refer to FIG. 9 in conjunction with FIGS. 5A and 5B. After the polarization conversion device 233 is accommodated in the third groove c3, the third sidewalls 233c, 233d, 233e, and 233f are accommodated in the third groove c3 and interact with the sidewall c31. Abutting, the edge portion of the third light incident surface 233a abuts against the side wall c32, the side wall c32 and the bottom wall c31 define the boundary of the third groove c3 and limit the polarization conversion device 233.

6 and 8, the side wall 221e and the side wall 221f of the frame 221 are formed with a second groove c2 that penetrates the top wall 221c and extends to the bottom wall 221d, and the second groove c2 is provided on the first surface 221a And the second surface 221b, specifically, the second groove c2 includes a groove p2 formed on the side wall 221e and a groove p3 formed on the side wall 221f. The grooves p2 and p3 both penetrate the top wall 221c and extend to Bottom wall 221d. The bottom wall 221d of the frame 221 includes a boss b, which is connected to the side wall c32 of the third groove c3, and the position of the boss b corresponds to the grooves p2 and p3.

As shown in FIGS. 5A and 5B, the second fly-eye lens 232 has a plate shape and includes a second light incident surface 232a, a second light output surface 232b, and second side walls 232c, 232d, 232e, 232f, and a second light incident surface 232a It is used to receive the illuminating light emitted by the first fly-eye lens 231, and a plurality of lens units are arranged on the second light-emitting surface 232b for emitting the shaped illuminating light, and each lens unit is a plano-convex lens. The second side walls 232c, 232d, 232e, and 232f are connected between the second light-incident surface 232a and the second light-emitting surface 232b.

4 and 6, when the second fly-eye lens 232 is assembled, the second fly-eye lens 232 is inserted into the second groove c2 from top to bottom, that is, the second sidewalls 232d and 232c of the second fly-eye lens 232 are sequentially Insert the second groove c2 so that the second fly-eye lens 232 is inserted into the second groove c2 in the frame 221. After the second fly-eye lens 232 is received in the second groove c2, the second side walls 232e, 232f is respectively accommodated in the grooves p2, p3, that is, the edge portions of the opposite sides of the second fly-eye lens 232 are limited in the grooves p2, p3. The second side wall 232c faces the top wall 221c, the first side wall 231d abuts against the boss b, the edge area of the second light exit surface 232b abuts against the side wall of the second groove c2, the boss b and the second groove c2 limits the second fly-eye lens 232.

In summary, the optical components (the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233) in the optical assembly 220 are all installed and positioned by the frame 221, thereby avoiding the coordinated positioning of the multiple optical components by multiple structural components. This causes the phenomenon of increased assembly errors to occur, and effectively improves the installation accuracy of each optical element, thereby ensuring the display image quality of the display device including the optical-mechanical assembly 200 having the optical assembly 220.

Please further refer to FIGS. 3, 5A and 5B, the first fixing mechanism includes a first pressing piece 223, a lateral pressing piece 224 and an upper pressing piece 227. The first pressing piece 223 is used for fixing on the first surface 221 a of the frame 221, that is, the first pressing piece 223 is used for fixing on the light incident side surface of the frame 221 for fixing the first fly-eye lens 231. The first pressing piece 223 includes a first frame 2231 connected to each other and a first elastic piece 2233 disposed on the first frame 2231. The first frame 2231 is used to be fixed to the frame 221. In this embodiment, the first frame 2231 is fixed to The first surface 221a covers the edge of the first light incident surface 231a of the first compound eye lens 231, and the first elastic piece 2233 is used to abut the first light incident surface 231a of the first compound eye lens 231 in the first direction, so that the first compound eye The lens 231 is fixed in the first groove c1.

Specifically, the first frame 2231 has a square shape and forms a light-passing hole h3, the illumination light is irradiated from the light-passing hole h3 into the light-passing hole h1, and the first elastic piece 2233 is connected to the area of the first frame 2231 adjacent to the light-passing hole h3. The first elastic piece 2233 includes a "T"-shaped connecting portion 2233a and a first resisting portion 2233b connected to the end of the connecting portion 2233a for resisting the edge of the first light incident surface 231a. The first resisting portion 2233b extends from the connecting portion 2233a. The opposite ends of the two extend out and bend toward the light hole h3. When the first pressing piece 223 is buckled on the first surface 221a, the first holding portion 2233b extends along the first direction. In this embodiment, the first pressing piece 223 is provided with four first elastic pieces 2233, two of which are arranged on the side of the first frame 2231 adjacent to the first side wall 221e, and the other two are arranged on the first frame 2231 adjacent to the first side wall 221e. On one side of the two side walls 221f, it can be understood that, in other embodiments, the specific number and location of the first elastic pieces 2233 can be flexibly set as required.

In one embodiment, the first elastic piece 2233 is connected to the outer ring edge of the first frame 2231. In one embodiment, the connecting portion 2233a has a shape other than the "T" shape.

The first pressing piece 223 is provided with a second elastic piece 2235 on the first frame 2231, and the second elastic piece 2235 extends from the side of the first frame 2231 adjacent to the top wall 221c of the frame 221 toward the light hole h3, or toward the second surface 221b Extending, the second elastic piece 2235 is used to resist the first side wall 231c of the first fly-eye lens 231 toward the bottom wall 221d. In this embodiment, the first pressing piece 223 is provided with two side-by-side second elastic pieces 2235, and the distance between the two second elastic pieces 2235 and the bottom wall 221d is the same. It can be understood that the first pressing piece 223 may also be provided with other numbers of second elastic pieces 2235.

The frame 221 further includes a first side surface 221g connected between the first surface 221a and the second surface 221b. The first side surface 221g includes the top surface of the top wall 221c, the bottom surface of the bottom wall 221d, and the outer surfaces of the side walls 221e and 221f. The top surface of the top wall 221c and the bottom surface of the bottom wall 221d are both located outside the frame 221. The top surface of the top wall 221c and the bottom surface of the bottom wall 221d are provided with a first protrusion 222.

The first frame 2231 includes a first fixing portion 2234 and a first mounting portion 2236 connected to the outer edge of the first fixing portion 2234. The first fixing portion 2234 covers the edge of the first surface 221a and the first light incident of the first fly-eye lens 231 On the edge of the surface 231a, the first mounting portion 2236 extends toward the second surface 221b. The first mounting portion 2236 is provided with a first mounting hole h4 through which the first protruding portion 222 passes. In one embodiment, the first pressing piece 223 is fixed by the first mounting hole h4 and the first protrusion 222 provided on the top wall 221c, the bottom wall 221d, or the side walls 221e and 221f.

Please refer to FIGS. 5A, 5B and 7 together. The optical assembly 220 further includes a lateral pressing sheet 224, which is disposed on the bottom wall c11 of the first groove c1 and the first fly-eye lens 231. Between one side wall 231e, it is used to resist the first side wall 231e of the first fly-eye lens 231. After the internal components of the optical assembly 220 are assembled, as shown in FIG. 7, the lateral pressing piece 224 abuts against the first side wall 231e of the first fly-eye lens 231, so that the first side wall 231f opposite to the first side wall 231e and The side wall 221f of the frame 221 abuts against each other. In addition, the first side wall 231d abuts against the bottom wall c11 of the first groove due to gravity, the first side wall 231c abuts against the second elastic piece 2235 of the first pressing piece 223, and the first The first light-incident surface 231a of the fly-eye lens 231 conflicts with the first elastic piece 2233 of the first pressing piece 223, and the first light-emitting surface 231b conflicts with the side wall c12 of the first groove c1, so the six surfaces of the first fly-eye lens 231 Both are restricted by the frame 221 and the first fixing mechanism.

Specifically, as shown in FIG. 5A, FIG. 5B and FIG. 7, the lateral pressing piece 224 includes a connecting portion 2241 and a second resisting portion 2242 provided at both ends of the connecting portion 2241. The second resisting portion 2242 extends from the connecting portion 2241. And bend to the same side of the connecting portion 2241. It can be seen from FIG. 7 that after the lateral pressing piece 224 and the first fly-eye lens 231 are installed inside the frame 221, the second abutting portion 2242 extends from the connecting portion 2241 and It is bent in the direction of the first fly-eye lens 231.

4, 5A and 5B, the second fixing mechanism includes a grating 225 for being accommodated in the second groove c2, the light emitted by the first fly-eye lens 231 is guided by the grating 225 and enters the second Fly-eye lens 232. The grating 225 includes a body 2251 and a second protrusion 2252 connected to the body 2251. A plurality of slits are formed on the main body 2251 for shielding stray light from the light emitted by the first fly-eye lens 231.

As shown in FIGS. 5A, 5B, and 6, the second groove c2 is also provided with a second mounting hole h5 for accommodating the second protrusion 2252. Specifically, the second mounting hole h5 is formed on the boss b And penetrate the top surface of the boss b. After the grating 225 is installed inside the frame 221, the bottom of the body 2251 abuts against the top surface of the boss b (FIGS. 4 and 6), and the second protrusion 2252 is inserted into the second mounting hole h5, so that the frame 221 is aligned Positioning of grating 225.

Please refer to FIGS. 5A, 5B and 10 together. The grating 225 also includes a third elastic piece 2253 connected to the edge of the main body 2251. The third elastic piece 2253 is installed in the frame 221 and located on the side wall 221e and the second fly-eye lens 232. The two side walls 232e are used to resist the second side wall 232e between the side walls 221e. Specifically, the third elastic piece 2253 is connected to one side of the main body 2251 and is bent in a direction away from the plane where the main body 2251 is located. The third elastic piece 2253 includes a connecting portion 2253a and a third resisting portion 2253b provided at both ends of the connecting portion 2253a In this embodiment, the two third resisting portions 2253b are respectively connected to one end of the connecting portion 2253a and bent to the same side of the connecting portion 2253a. After the optical assembly 220 is assembled, it can be seen that the third resisting portion 2253b is formed by The connecting portion 2253a is bent toward the second fly-eye lens 232, so that the second side wall 232f of the second fly-eye lens 232 is against the side wall 221f of the frame 221, thereby positioning the second fly-eye lens 232 in the horizontal direction in FIG. 10 .

As shown in FIGS. 5A and 5B, the second fixing mechanism further includes a second pressing piece 226 for being received in the second groove c2, and the second pressing piece 226 is disposed between the grating 225 and the second fly-eye lens 232 The second pressing sheet 226 includes a bending portion 2261 having an undulating surface, and the undulating surface of the bending portion 2261 is used to hold between the second fly-eye lens 232 and the grating 225, so that the second fly-eye lens 232 and the grating 225 are Keep the preset distance. Since the grating 225 is used to block stray light, the temperature is often relatively high. The second pressing sheet 226 is sandwiched between the second fly-eye lens 232 and the grating 225, so as to prevent the heat of the grating 225 from being directly transferred to the second fly-eye lens 232 or polarization The conversion device 233 is beneficial to prolong the service life of the optical components inside the optical assembly 220. In addition, by setting the size of the bending portion 2261 in the first direction (the bending width of the bending portion 2261 in the first direction), both sides of the undulating surface of the bending portion 2261 abut the grating 225 and the second fly-eye lens respectively 232. Since the edge portion of the second light-emitting surface 232b of the second fly-eye lens 232 abuts against the side wall of the second groove c2, and the second light-incident surface 232a of the second fly-eye lens 232 abuts against the second pressing plate 226, The second fly-eye lens 232 is restricted in the first direction and the second direction. The second protrusion 2252 of the grating 225 is accommodated in the second mounting hole h5, and the second pressing piece 226 is opposed to the grating 225 in the first direction, thereby preventing the grating 225 from shaking in the first direction and the second direction. It helps to improve the accuracy of component positioning. In this embodiment, the second pressing piece 226 is in a box shape, and the bending portions 2261 are arranged on opposite sides of the second pressing piece 226, so that the grating 225 and the second fly-eye lens 232 are arranged at intervals, thereby avoiding the grating 225 The heat of φ is directly transferred to the second fly eye lens 232 or the polarization conversion device 233.

As shown in Figures 3, 4, 5A and 5B, the first fixing mechanism further includes an upper pressing piece 227 provided at the top. The upper pressing piece 227 includes a bottom plate 2271, a first pressing portion 2272, and a second pressing The tightening portion 2273, the first pressing portion 2272 and the second pressing portion 2273 are respectively connected to one side edge of the bottom plate 2271 and extend in a direction away from the plane where the bottom plate 2271 is located. Specifically, the first pressing portion 2272 and the second pressing portion 2273 extend to the same side of the bottom plate 2271. After the optical assembly 220 is assembled, it can be seen that the first pressing portion 2272 and the second pressing portion 2273 are opposite to each other. The bottom plate 2271 extends toward the bottom wall 221d of the frame 221. The first pressing part 2272 is used to press the first fly eye lens 231 through the top wall 221c of the frame 221 toward the bottom wall 221d, and the second pressing part 2273 is used to press the top wall 221c of the frame 221 toward the bottom wall 221d. The second fly-eye lens 232 is compressed. In other words, the first pressing portion 2272 is used to abut the first side wall 231c of the first fly-eye lens 231, and the second pressing portion 2273 is used to abut the second side wall 232c of the second fly-eye lens 232, thereby to The side pressing piece 227 realizes the positioning of the top and bottom of the first fly-eye lens 231 and the second fly-eye lens 232, and prevents the first fly-eye lens 231 and the second fly-eye lens 232 from shaking up and down in the frame 221.

As shown in FIGS. 3, 5A, and 5B, the upper pressing piece 227 is provided with holes to fit and fix the protrusions on the frame 221. Specifically, the upper pressing piece 227 includes a second mounting portion 2274 connected to the bottom plate 2271. The second mounting portion 2274 extends from the bottom plate 2271 and is bent away from the bottom plate 2271. The second mounting portion 2274 is provided with a third mounting hole. h6, the side walls 221e and 221f of the frame 221 are provided with third protrusions 222a. During assembly, the third protrusions 222a pass through the third mounting hole h6, thereby fixing the upper pressing piece 227 to the top of the frame 221 . In other embodiments, the positions of the third mounting hole h6 on the upper pressing piece 227 and the third protrusion 222a on the frame 221 can be flexibly set as needed.

Please refer to FIGS. 5A, 5B, and 11 together. The third fixing mechanism includes a third pressing piece 228. The third pressing piece 228 includes a second frame 2281 and a fourth elastic piece 2282 disposed on the second frame 2281. The frame 2281 is fixed on the frame 221 and covers the edge of the third light-emitting surface 233b of the polarization conversion device 233. Specifically, the second frame 2281 is buckled and covers the second surface 221b, and the fourth elastic piece 2282 is used to abut against the second surface in the second direction. Three light-emitting surface 233b.

Specifically, the second frame 2281 has a square shape and forms a light-through hole h7, and the light emitted by the polarization conversion device 233 passes through the light-through hole h7 and then exits the optical component 220. The fourth elastic piece 2282 is connected to the edge portion of the second frame 2281 adjacent to the light-passing hole h7. The fourth elastic piece 2282 includes a "T"-shaped connecting portion 2282a and a first connecting portion 2282a connected to the end of the connecting portion 2282a for resisting the polarization conversion device 233. Three resisting portions 2282b. The third resisting portion 2282b extends from the connecting portion 2282a and is bent in a direction away from the plane of the connecting portion 2282a. After the third pressing piece 228 is installed on the frame 221, the third resisting portion 2282b extends along The second direction extends. In this embodiment, the third pressing piece 228 is provided with four fourth elastic pieces 2282, two of which are arranged on the side of the second frame 2281 adjacent to the top wall 221c, and the other two are arranged on the second frame 2281 adjacent to the bottom wall 221d Side. In other embodiments, the number and positions of the fourth elastic pieces 2282 provided on the third pressing piece 228 can be flexibly set as required.

The third pressing piece 228 includes a side plate 2283 connected to the second frame 2281, and the side plate 2283 and the fourth elastic piece 2282 are located on different side edges of the second frame 2281. Specifically, in this embodiment, the four fourth elastic pieces 2282 are arranged on the upper and lower edges of the second frame 2281 in FIG. 11, and the two side plates 2283 are arranged on the left and right edges of the second frame 2281 in FIG. 11 . The side plate 2283 extends in a direction away from the plane where the second frame 2281 is located. In this embodiment, the side plate 2283 extends in a direction perpendicular to the plane where the second frame 2281 is located, and the third pressing piece 228 is provided on the side plate 2283 to pass light. The fifth elastic piece 2284 extends obliquely in the direction of the hole h7, and the fifth elastic piece 2284 is used to resist the third side walls 233e and 233f of the polarization conversion device 233. The number and positions of the fifth elastic pieces 2284 provided on the third pressing piece 228 can be flexibly selected as required.

As shown in FIG. 11, the first side surface 221g of the frame 221 is provided with a fourth protruding portion 222b. Specifically, two fourth protruding portions 222b are respectively provided on the side walls 221e and 221f. The second frame 2281 includes a second fixing portion 2286 and a third mounting portion 2285 connected to the outer edge of the second fixing portion 2286. The second fixing portion 2286 covers the edge of the second surface 221b and the third light-emitting surface 233b of the polarization conversion device 233 The third mounting portion 2285 extends toward the first surface 221a, the third mounting portion 2285 is provided with a fourth mounting hole h11 through which the fourth protrusion 222b passes, and the fourth protrusion 222b is used to pass through The fourth mounting hole h11 makes the third pressing piece 228 fixed on the frame 221.

In the optical assembly 220 provided by the present invention, the frame 221 is used to position the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233, which avoids the increase in the number of optical elements caused by the coordinated positioning of multiple structural components. The phenomenon of assembly errors occurs, which effectively improves the installation accuracy of each optical element, thereby ensuring the display image quality of the display device including the optical-mechanical assembly 200 having the optical assembly 220. The first fixing mechanism, the second fixing mechanism, and the third fixing mechanism are used to fix the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233 to prevent the first fly-eye lens 231, the second fly-eye lens 232, and the The polarization conversion device 233 shakes after being installed in the frame 221.

For the polarization conversion device 233 (such as PCS) made of conventional plastic materials, when the temperature exceeds 70° C., the stability of the internal bonding glue of the PCS decreases and even burn marks may appear on the surface of the PCS, which will significantly affect the performance of the PCS. In the optical machine assembly 200 shown in FIG. 2 under the sealed condition (for example, the optical machine cover and the optical machine housing 210 are used for dust-proof sealing), the air in the optical machine housing 210 is difficult to flow, and the polarization conversion device 233, the first fly-eye lens The heat generated by the 231 and the second fly-eye lens 232 (FIG. 5A, FIG. 5B) is mainly discharged through the frame 221, and the heat dissipation effect is very limited.

As shown in FIG. 2, in the present invention, a fan assembly 250 is provided on the side of the optical chassis 210 close to the polarization conversion device 233. Specifically, the fan assembly 250 is provided on the top of the optical chassis 210, and the polarization conversion device 233 in the optical assembly 220 The frame 221 and its corresponding part of the frame 221 are arranged at the bottom of the optical chassis 210, and the fan assembly 250 is located on the side of the top of the frame 221 and is arranged corresponding to the polarization conversion device 233. The airflow generated by the fan assembly 250 is used to take away the surface of the polarization conversion device 233. The heat.

Please refer to FIG. 12 in conjunction with FIG. 2. FIG. 12 shows the relative positional relationship between the fan assembly 250 and the polarization conversion device 233, the second fly-eye lens 232 and the first fly-eye lens 231 in the optical-mechanical assembly 200. The polarization conversion device 233 corresponds to the arrangement of the fan assembly 250, and the airflow generated by the fan assembly 250 flows through the third light exit surface 233b of the polarization conversion device 233, which facilitates heat dissipation of the polarization conversion device 233 through the third light exit surface 233b.

The outer side of the optical chassis 210 is provided with a first fin 211 (FIG. 2 ), and the inner side of the optical chassis 210 is provided with a plurality of second fins 212 (FIG. 12 ). The first fin 211 and the second fin 212 are both Extending in a plate shape. The fan assembly 250 generates an air flow to the surface of the polarization conversion device 233 through a preset direction of the second fin 212. The extension direction of the second fin 212 is the same as the flow direction of the air flow, that is, the extension direction of the second fin 212 is the preset direction . The heat carried by the air flow is transferred to the air around the first fin 211 through the second fin 212 and the first fin 211 in sequence. The heat on the first fin 211 is conducted to other heat dissipation components outside the optical chassis 210 and taken away with the external air duct, so as to achieve the purpose of continuously dissipating the polarization conversion device 233.

Please refer to FIGS. 2, 5A, 5B, and 12 together. The frame 221 further includes an air flow channel d that penetrates the top and bottom of the frame 221, that is, the frame 221 is a hollow structure, and the air flow channel d penetrates the top wall 221c and the bottom wall 221d. The air flow channel d is arranged between the first fly-eye lens 231 and the second fly-eye lens 232, the bottom plate 2271 of the upper pressing piece 227 is provided with a vent hole h8, and the vent hole h8 is provided corresponding to the air flow channel d.

The airflow generated by the fan assembly 250 is used to take away the heat from the surface of the polarization conversion device 233, the third light-emitting surface 233b of the polarization conversion device 233 is arranged perpendicular to the bottom wall 210b of the optical chassis 210, and the airflow generated by the fan assembly 250 flows through the polarization conversion After the third light-emitting surface 233b of the device 233, a part of the airflow passes through the bottom wall 210b of the optical chassis 210, flows through the airflow channel d between the second fly-eye lens 232 and the first fly-eye lens 231, and is discharged from the vent hole h8 And return to the fan assembly 250, another part of the airflow bounces off the bottom wall 210b of the optical chassis 210 and flows back to the fan assembly 250 through the inner surface of the optical chassis 210. The light incident and light exit surfaces of the first fly-eye lens 231, the second fly-eye lens 232, and the polarization conversion device 233 are perpendicular to the bottom wall 210b of the optical chassis 210, and the airflow generated by the fan assembly 250 can flow through the surface of the optical element, especially The airflow flowing through the surface of the polarization conversion device 233 is relatively strong, and the airflow inside the frame 221 circulates, which facilitates the heat dissipation of the polarization conversion device 233, the second fly-eye lens 232 and the first fly-eye lens 231, especially when the optical chassis 210 is in a sealed condition The temperature-sensitive polarization conversion device 233 is effectively dissipated by adopting a built-in circulating air duct.

Referring to FIGS. 13-14, further, the fan assembly 250 includes a fan 253, a base 255, a first flexible body 256, a second flexible body 257, and a wire pressing plate 258 arranged in sequence. Both the first flexible body 256 and the second flexible body 257 are made of flexible materials, the base 255 forms a first threading hole h10, the first flexible body 256 forms a second threading hole h9, the fan 253 is connected to an electric wire L, and the electric wire L is not connected The free end L2 of the fan 253 is used to sequentially pass through the first threading hole h10 and the second threading hole h9 and is drawn from between the first flexible body 256 and the second flexible body 257, and the wire pressing plate 258 is used to be installed on the base 255 And cover the first flexible body 256 and the second flexible body 257, so that the first flexible body 256 and the second flexible body 257 squeeze the wire L, and the first flexible body 256 and the second flexible body 257 are used to squeeze on opposite sides. The wire L can ensure a high degree of sealing, but also prevent the wire L from being squeezed and worn. In addition, the first flexible body 256 and the second flexible body 257 are used to squeeze the electric wire L to seal the gap near the first threading hole h10, and the first flexible body 256 and the second flexible body 256 are pressed by the pressing plate 258. The body 257 also ensures the sealing of the first threading hole h10 of the base 255 to prevent dust from entering the fan assembly 250 from the first threading hole h10.

The fan 253 is fixed on the four bosses 2551 of the base 255 by screws 251, a gap x is reserved between the fan 253 and the base 255 for air extraction; the base 255 is fixed to the optical chassis 210 by screws 259, and the base 255 A third flexible body 254 is arranged between the optical chassis 210 to seal and prevent dust, and the third flexible body 254 may be a silicone ring. In this embodiment, a light blocking sheet 252 is provided on the side of the fan 253 away from the base 255 to prevent stray light in the light housing 210 from illuminating the front of the fan 253, which is beneficial to slow down the speed of the fan 253 being aging by light.

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended to fall within the claims. All changes within the meaning and scope of equivalent elements of are included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "including" does not exclude other units or steps, and the singular does not exclude the plural. Multiple devices stated in the device claims can also be implemented by the same device or system through software or hardware. Words such as first and second are used to denote names, but do not denote any specific order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements are made without departing from the spirit and scope of the technical solution of the present invention.

Claims (17)

1. An optical assembly, which is characterized by comprising a first fly-eye lens, a second fly-eye lens, a polarization conversion device, and a frame. The frame has a first surface and a second surface spaced apart from each other, and penetrates the first surface and the For the beam channel on the second surface, the frame is sequentially provided with: along the direction from the first surface to the second surface:

   A first groove for accommodating the first compound eye lens;

   A second groove for accommodating the second fly-eye lens; and

   The third groove is used to house the polarization conversion device;

   The optical assembly further includes a first fixing mechanism, a second fixing mechanism, and a third fixing mechanism. The first fixing mechanism, the second fixing mechanism, and the third fixing mechanism are used to connect to the first concave The groove, the second groove, and the third groove cooperate to fix the first fly-eye lens, the second fly-eye lens, and the polarization conversion device.
2. 3. The optical assembly of claim 1, wherein the first groove is recessed on the first surface of the frame, the first fixing mechanism includes a first pressing piece, and the first pressing piece It includes a first frame and a first elastic piece arranged on the first frame. The first frame is fixed on the frame and covers the edge of the light incident surface of the first fly-eye lens. The direction of the first surface pointing to the second surface abuts against the light incident surface of the first fly-eye lens.
3. The optical assembly according to claim 2, wherein the frame comprises a first side surface connecting the first surface and the second surface, and a first protrusion is provided on the first side surface, and the first A frame includes a first fixing portion and a first mounting portion connected to the outer edge of the first fixing portion, the first fixing portion covering the edge of the first surface and the edge of the light incident surface of the first fly-eye lens The first mounting portion extends toward the direction of the second surface, and the first mounting portion is provided with a first mounting hole through which the first protruding portion passes.
4. 3. The optical assembly of claim 2, wherein the first pressing piece further comprises a second elastic piece, and the second elastic piece is disposed on the first frame and extends toward the second surface for Against the side wall of the first compound eye lens.
5. The optical assembly according to claim 1, wherein the first fixing mechanism further comprises a lateral pressing sheet for holding the first fly-eye lens, and the lateral pressing sheet is disposed on the first Between the groove wall of the groove and the side wall of the first fly-eye lens.
6. The optical assembly of claim 1, wherein the second groove is provided between the first surface and the second surface, and the second fixing mechanism includes a second groove that is accommodated in the second surface. The grating in the groove, the light emitted from the first fly-eye lens is guided by the grating and then enters the second fly-eye lens. The grating includes a body and a second protrusion connected to the body. The groove wall of the second groove is also provided with a second mounting hole for accommodating the second protrusion.
7. 7. The optical assembly of claim 6, wherein the grating further comprises a third elastic piece connected to the edge of the main body, the third elastic piece is bent in a direction away from the main body, and the third elastic piece Used to resist the side wall of the second compound eye lens.
8. 7. The optical assembly of claim 6, wherein the second fixing mechanism further comprises a second pressing piece for being accommodated in the second groove, and the second pressing piece is disposed on the Between the grating and the second fly-eye lens, the second pressing sheet includes a bending portion having an undulating surface, and the undulating surface of the bending portion is used to resist between the second fly-eye lens and the grating between.
9. The optical assembly of claim 1, wherein the first fixing mechanism further comprises an upper pressing piece provided on the top of the frame, and the upper pressing piece comprises a bottom plate, a first pressing part, and a second Two pressing parts, the first pressing part and the second pressing part are respectively connected to one side of the bottom plate and extend away from the bottom plate, and the first pressing part is used to follow the The top of the frame is directed to the bottom of the frame to press the first compound eye lens, and the second pressing part is used to press the first compound eye lens in a direction from the top of the frame to the bottom of the frame. Two compound eye lenses.
10. 8. The optical assembly of claim 1, wherein the third groove is recessed on the second surface of the frame, the third fixing mechanism includes a third pressing piece, and the third pressing piece It includes a second frame and a fourth elastic piece disposed on the second frame. The second frame is fixed on the frame and covers the edge of the light-emitting surface of the polarization conversion device. The second surface abuts the light-emitting surface of the polarization conversion device in a direction directed to the first surface.
11. The optical assembly of claim 10, wherein the frame includes a first side surface connecting the first surface and the second surface, and a fourth protrusion is provided on the first side surface, and the first side surface The second frame includes a second fixing part and a third mounting part connected to the outer edge of the second fixing part, the second fixing part covers the edge of the second surface and the edge of the light emitting surface of the polarization conversion device, The third mounting portion extends toward the direction of the first surface, and the third mounting portion is provided with a fourth mounting hole through which the fourth protruding portion passes.
12. The optical assembly according to claim 10, wherein the second frame is in a square shape and forms a light-through hole, and the light emitted from the light-emitting surface of the polarization conversion device passes through the light-through hole and passes from the optical The component is emitted, the third pressing piece includes a side plate connected to the second frame, the side plate and the fourth elastic piece are located on different side edges of the second frame, and the side plate is far away from the The second frame extends in the direction, the side plate is provided with a fifth elastic piece extending obliquely to the direction of the light-passing hole, and the fifth elastic piece is used to resist the side wall of the polarization conversion device.
13. 9. The optical assembly of claim 9, wherein the frame further comprises an airflow channel penetrating through the top and bottom of the frame, the airflow channel being arranged between the first compound eye lens and the second compound eye lens, The bottom plate of the upper pressing sheet is provided with a vent hole, and the vent hole is provided corresponding to the air flow channel.
14. An optical machine assembly, comprising an optical machine case, a fan assembly, and the optical assembly according to any one of claims 1-12, the fan assembly is arranged corresponding to the polarization conversion device, and the fan assembly generates The airflow flows across the surface of the polarization conversion device.
15. The opto-mechanical assembly according to claim 14, wherein the fan assembly includes a fan, a base, a first flexible body, a second flexible body, and a crimping plate, the first flexible body and the second flexible body The bodies are made of flexible materials, a first threading hole is formed on the base, a second threading hole is formed on the first flexible body, and the first flexible body and the second flexible body sequentially cover the first A threading hole, the fan is connected to a wire, and the free end of the wire that is not connected to the fan passes through the first threading hole and the second threading hole in turn and passes from the first flexible body and the first Lead out between the two flexible bodies, and the line pressing plate is used to be installed on the base and cover the first flexible body and the second flexible body, so that the first flexible body and the second flexible body Squeeze the wire.
16. An optical machine assembly, comprising an optical machine housing, a fan assembly, and the optical assembly according to claim 13, wherein the fan assembly is arranged corresponding to the polarization conversion device, and the light exit surface of the polarization conversion device is perpendicular to On the bottom wall of the optical chassis, a part of the air flow generated by the fan assembly sequentially flows through the light exit surface of the polarization conversion device, the bottom wall of the optical chassis, and the air flow channel flows back from the vent to the Mentioned fan assembly.
17. A display device, characterized by comprising the optical machine assembly according to any one of claims 14-16.

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