A light condensing component, an optical engine module and a near-eye display device

Abstract

The present invention discloses a light condensing component, an optical engine module and a near-eye display device, relating to the field of optical technologies. After the light emitted by a light source is transmitted through a first transmission surface, the first part of the light that irradiates on the spherical surface is transmitted through the spherical surface, and the second part of the light that irradiates on the inclined reflection straight surface is reflected by a first reflection surface and / or a second reflection surface and then transmitted through the spherical surface; after the first part of the light and the second part of the light transmitted through the spherical surface are incident on a polarization beam splitting film, the first polarized light is transmitted through the polarization beam splitting film, and the second polarized light is reflected by the polarization beam splitting film and then reflected by a 45° reflection film and is transmitted as the first polarized light after being converted by a 1 / 2 wave plate. The light condensing component provided by the present invention can improve the brightness on the premise of ensuring a small volume of the optical engine module.

Description

Technical Field

[0001] The present invention relates to the field of optical technologies, and in particular, to a light condensing component, an optical engine module, and a near-eye display device. Background Art

[0002] In recent years, the Augmented Reality (AR) technology has developed rapidly. Among them, the optical engine plus optical waveguide solution is a lightweight and miniaturized solution, which is one of the most important development solutions in the future AR development plan. In the optical waveguide technology solution, an optical engine, that is, an optical engine, is required as an image generation unit. Generally speaking, the optical waveguide can currently be made thin and light, and its shape has approached the size and shape of a myopia glasses lens.

[0003] For the optical engine chip solution, compared with the Digital Micromirror Device (DMD), the Liquid Crystal on Silicon (LCOS) has the advantages of smaller volume, more mature technology, and lower cost. Although its volume is not as small as that of the self-luminous micro Light Emitting Diode (micro LED) optical engine solution, at present, the resolution of the micro light emitting diode is relatively low and it cannot be mass-produced in a mature, stable and low-cost manner; therefore, the LCOS optical engine solution is currently the best choice for AR optical engines.

[0004] In the process of LCOS optical engine design, the miniaturization and high brightness of the optical engine often become design difficulties. Due to the special spatial light modulation characteristics of LCOS, the illumination optical path of the optical engine often loses 50% of the brightness. Summary of the Invention

[0005] The present invention provides a light condensing component, an optical engine module, and a near-eye display device, which can improve the brightness on the premise of ensuring the small volume of the optical engine module.

[0006] In a first aspect, an embodiment of the present invention provides a light condensing component, including: a light guiding device and a polarization converter;

[0007] The light guiding device includes a first transmission surface, a first semi-transmissive and semi-reflective surface, a first reflection surface, and a second reflection surface; the polarization converter is disposed on the light-emitting side of the first semi-transmissive and semi-reflective surface;

[0008] The first semi-transparent and semi-reflective surface includes a plurality of spherical surfaces extending in a first direction and arranged alternately in a second direction, and inclined reflective straight surfaces inclined with respect to the optical axis, where the first direction and the second direction intersect; the polarization converter includes a plurality of polarization beam splitting films and 45° reflective films extending in the first direction and arranged alternately in the second direction, and the polarization converter further includes a plurality of half-wave plates, and the half-wave plates are arranged on a side of the 45° reflective film away from the light guiding device; the polarization beam splitting film is arranged opposite to the spherical surface, and the 45° reflective film and the half-wave plates are arranged opposite to the inclined reflective straight surfaces;

[0009] After the light emitted by the light source is transmitted through the first transmission surface, the first part of the light irradiated on the spherical surface is transmitted through the spherical surface, and the second part of the light irradiated on the inclined reflective straight surface is reflected by the first reflective surface and / or the second reflective surface and then transmitted through the spherical surface;

[0010] After the first part of the light and the second part of the light transmitted through the spherical surface are incident on the polarization beam splitting film, the first polarized light is transmitted through the polarization beam splitting film, and the second polarized light is reflected by the polarization beam splitting film and then reflected by the 45° reflective film and is transmitted through the half-wave plate and converted into the first polarized light.

[0011] Optionally, the inclination angles of at least two of the inclined reflective straight surfaces with respect to the optical axis are different, the number of the inclined reflective straight surfaces is the same as the number of the half-wave plates, and the areas of the light exit surfaces are the same.

[0012] Optionally, the value range of the inclination angle of the inclined reflective straight surface with respect to the optical axis is 0 to 45 degrees.

[0013] Optionally, the light guiding device includes a solid light guiding rod, a hollow light guiding rod or a quadratic surface light guiding rod;

[0014] The first transmission surface and the first semi-transparent and semi-reflective surface are arranged opposite to each other; the first reflective surface and the second reflective surface are arranged opposite to each other.

[0015] Optionally, the shape of the outer contour of the first transmission surface is circular; the shape of the outer contour of the first semi-transparent and semi-reflective surface is circular;

[0016] The diameter of the first transmission surface is and the diameter of the first semi-transparent and semi-reflective surface is , and the emission angle of the light source is ;

[0017] The emission angle of the light transmitted through the first semi-transparent and semi-reflective surface is ;

[0018] The optical axis length L of the light guide device, the range of L / D2 is 1.5 to 2.5.

[0019] Optionally, the light guide device includes a side-entry backplane;

[0020] The first transmission surface and the first reflection surface are oppositely arranged; the second reflection surface and the first semi-transmissive and semi-reflective surface are oppositely arranged.

[0021] Optionally, the outer contour shape of the first transmission surface is rectangular; the outer contour shape of the first semi-transmissive and semi-reflective surface is rectangular;

[0022] The length of the diagonal of the first transmission surface is and the length of the diagonal of the first semi-transmissive and semi-reflective surface is The light emitting angle of the light source is ;

[0023] The exit angle of the light passing through the first semi-transmissive and semi-reflective surface is ;

[0024] The optical axis length L of the light guide device, the range of L / D4 is 1.5 to 2.5.

[0025] Optionally, the first polarized light is P-polarized light and the second polarized light is S-polarized light.

[0026] In a second aspect, an optical engine module provided by an embodiment of the present invention further includes: an illumination component and an imaging component;

[0027] The illumination component includes a light source and the condenser component described in the first aspect, and the imaging component includes a lens group and a light modulator.

[0028] In a third aspect, a near-eye display device provided by an embodiment of the present invention includes the optical engine module described in the second aspect.

[0029] Embodiments of the present invention disclose a light condensing component, an optical engine module, and a near-eye display device. By providing that the first semi-transparent and semi-reflective surface includes a plurality of spherical surfaces extending in a first direction and arranged alternately in a second direction, and inclined reflective straight surfaces inclined with respect to the optical axis, after the light emitted by the light source is transmitted through the first transmissive surface, the first part of the light irradiated on the spherical surface is transmitted through the spherical surface, and the second part of the light irradiated on the inclined reflective straight surface is reflected by the first reflective surface and / or the second reflective surface and then transmitted through the spherical surface, so that the light with a suitable field of view angle can be focused in regions, and the utilization rate of light is improved. Since the polarization beam splitting film is disposed opposite to the spherical surface, and the 45° reflective film and the 1 / 2 wave plate are disposed opposite to the inclined reflective straight surface, after the first part of the light and the second part of the light are incident on the polarization beam splitting film, the first polarized light is transmitted through the polarization beam splitting film, and the second polarized light is reflected by the polarization beam splitting film and then reflected by the 45° reflective film and transmitted through the 1 / 2 wave plate after being converted into the first polarized light, so that the lost polarized light can be reused on the premise of ensuring a small volume. The light condensing component provided by the embodiments of the present invention can improve the brightness on the premise of ensuring a small volume of the optical engine module.

[0030] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0032] Figure 1 is a schematic structural diagram of an optical engine module in the prior art;

[0033] Figure 2 is a schematic structural diagram of a light condensing component provided by an embodiment of the present invention;

[0034] Figure 3 is Figure 2 the optical path diagram of the light guiding device in

[0035] Figure 4 is Figure 2 the optical path diagram of the polarization converter in

[0036] Figure 5 is Figure 2 the schematic diagram of the optical axis direction of the 1 / 2 wave plate in

[0037] Figure 6 is Figure 2Schematic diagram of the light-emitting side of the first semi-transmissive and semi-reflective surface of the light guide device in

[0038] Figure 7 It is a schematic structural diagram of another light guide device provided by an embodiment of the present invention;

[0039] Figure 8 It is a schematic structural diagram of another light guide device provided by an embodiment of the present invention;

[0040] Figure 9 It is a schematic structural diagram of another light guide device provided by an embodiment of the present invention;

[0041] Figure 10 It is a schematic structural diagram of an optical engine module provided by an embodiment of the present invention;

[0042] Figure 11 It is a schematic structural diagram of an optical engine module of the prior art;

[0043] Figure 12 It is a light intensity distribution diagram of the light-emitting side of the first semi-transmissive and semi-reflective surface of a light guide device provided by an embodiment of the present invention. Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, 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 efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1 It is a schematic structural diagram of an optical engine module of the prior art. Currently, common miniaturized LCOS lighting solutions are as Figure 1 shown, refer to Figure 1, the optical engine module of the prior art includes an illumination optical path 100 and an imaging optical path 200. The LED emits Lambertian light as a light source, which enters the imaging optical path 200 after being collimated and homogenized by the illumination optical path 100. The imaging optical path 200 includes a PBS polarization element. In order to enable the LCOS to achieve polarization conversion modulation energy supply, it is necessary to convert natural light into linearly polarized light before entering the imaging optical path 200. Generally, natural light is converted into S-polarized light, and P-polarized light will be absorbed. Therefore, the solution of the prior art will theoretically reduce the light efficiency by 50%.

[0047] In order to reuse the lost polarized light on the premise of ensuring small-volume illumination of the optical engine module, the present invention provides a light condensing component. Figure 2 It is a schematic structural diagram of a light condensing component provided by an embodiment of the present invention. Figure 3 It is Figure 2 The optical path diagram of the light guiding device in Figure 4 It is Figure 2 The optical path diagram of the polarization converter in Figures 2 - 4 , the device includes: a light guiding device 110 and a polarization converter 120; the light guiding device 110 includes a first transmission surface 111, a first semi-transmissive and semi-reflective surface 112, a first reflective surface 113 and a second reflective surface 114; the polarization converter 120 is arranged on the light-emitting side of the first semi-transmissive and semi-reflective surface 112; the first semi-transmissive and semi-reflective surface 112 includes a plurality of spherical surfaces 1121 extending along a first direction Z and alternately arranged along a second direction X, and inclined reflective straight surfaces 1122 inclined with respect to the optical axis, and the first direction Z and the second direction X intersect. The polarization converter 120 includes a plurality of polarization beam splitting films 121 and 45° reflective films 122 alternately arranged along the first direction Z and along the second direction X. The polarization converter 120 further includes a plurality of 1 / 2 wave plates 123, and the 1 / 2 wave plates 123 are arranged on the side of the 45° reflective film 122 away from the light guiding device 110; the polarization beam splitting film 121 is arranged opposite to the spherical surface 1121, and the 45° reflective film 122 and the 1 / 2 wave plate 123 are arranged opposite to the inclined reflective straight surface 1122. Continuing to refer to Figure 3 and Figure 4 , after the light emitted by the light source is transmitted through the first transmission surface 111, the first part of the light irradiated on the spherical surface 1121 is transmitted through the spherical surface 1121, and the second part of the light irradiated on the inclined reflective straight surface 1122 is reflected by the first reflective surface 113 and / or the second reflective surface 114 and then transmitted through the spherical surface 1121; after the first part of the light transmitted through the spherical surface 1121 and the second part of the light are incident on the polarization beam splitting film 121, the first polarized light is transmitted through the polarization beam splitting film 121, and the second polarized light is reflected by the polarization beam splitting film 121 and then reflected by the 45° reflective film 122 and is transmitted through the 1 / 2 wave plate 123 and converted into the first polarized light.

[0048] Among them, the material of the light guide device 110 can be a plastic material, and the refractive index can be 1.6 to 1.7. The embodiments of the present invention do not limit the refractive index of the material of the light guide device 110. The higher the refractive index, the higher the total efficiency. It should be noted that the first transmission surface 111 is the light incident surface of the light source, and the surface type is a plane or a curved surface. The first semi-transmissive and semi-reflective surface 112 is the light output surface of the light guide device 110, and the surface type is a composite surface including a plurality of spherical surfaces 1121 extending along the first direction Z and alternately arranged along the second direction X and inclined reflective straight surfaces 1122 inclined with respect to the optical axis. Specifically, in one embodiment, the first polarized light is P-polarized light and the second polarized light is S-polarized light.

[0049] Figure 5 is Figure 2 a schematic diagram of the optical axis direction of the half-wave plate in Figure 5 , in the plane formed by the third direction Y and the second direction X, the included angle between the optical axis of the half-wave plate 123 and the second direction X is 45°. Among them, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other. The polarization converter 120 in the embodiments of the present invention can convert all the natural light transmitted by the spherical surface 1121 into one type of polarized light. If the light is incident on the polarization beam splitting film 121, the P-polarized light will directly pass through, and the S-polarized light will be reflected to the 45° reflection film 122 and then reflected by the 45° reflection film 122 to the half-wave plate 123. The half-wave plate 123 converts the S-polarized light into P-polarized light. Therefore, all components of the natural light will be converted into P-polarized light. If you want to generate S-polarized light, you only need to Figure 2 rotate the polarization converter 120 in

[0050] Figure 6 is Figure 2 a schematic diagram of the light output side of the first semi-transmissive and semi-reflective surface of the light guide device in Figure 6 , the yellow area is the spherical surface 1121. The function of the spherical surface 1121 is to focus the light with a suitable field of view in different regions, so that a smaller aperture and higher coupling efficiency can be achieved when passing through the polarization converter 120. The white area is the inclined reflective straight surface 1122. The light output sides of the inclined reflective straight surface 1122 and the spherical surface 1121 are both strip-shaped. The inclined reflective straight surface 1122 is used to reflect the light outside the interval of the spherical surface 1121 into the light guide device 110. After being reflected inside the light guide device 110, this part of the light is emitted from the spherical surface 1121 again.

[0051] In the embodiment of the present invention, by setting the first semi-transparent and semi-reflective surface 112 to include a plurality of spherical surfaces 1121 extending along the first direction Z and alternately arranged along the second direction X, and inclined reflective straight surfaces 1122 inclined relative to the optical axis, after the light emitted by the light source is transmitted through the first transmission surface 111, the first part of the light irradiated on the spherical surface 1121 is transmitted through the spherical surface 1121, and the second part of the light irradiated on the inclined reflective straight surface 1122 is reflected by the first reflective surface 113 and / or the second reflective surface 114 and then transmitted through the spherical surface 1121, so that the light with a suitable field of view angle can be focused in regions, improving the utilization rate of light. Since the polarization beam splitting film 121 is disposed opposite to the spherical surface 1121, and the 45° reflective films 122 and the half-wave plates 123 are disposed opposite to the inclined reflective straight surfaces 1122, after the first part of the light and the second part of the light are incident on the polarization beam splitting film 121, the first polarized light is transmitted through the polarization beam splitting film 121, and the second polarized light is reflected by the polarization beam splitting film 121 and then reflected by the 45° reflective film 122 and transmitted as the first polarized light after passing through the half-wave plate 123, so that the lost polarized light can be reused on the premise of ensuring a small volume. The light condensing component provided by the embodiment of the present invention can improve the brightness on the premise of ensuring a small volume of the optical engine module.

[0052] Optionally, on the basis of the above embodiment, continue to refer to Figure 2 , the inclination angles of at least two inclined reflective straight surfaces 1122 relative to the optical axis are different, the number of the inclined reflective straight surfaces 1122 is the same as the number of the half-wave plates 123, and the areas of the light-emitting surfaces are the same.

[0053] Specifically, to ensure uniformity, the inclination directions of two adjacent inclined reflective straight surfaces 1122 are different, and the inclination directions of two inclined reflective straight surfaces 1122 separated by one inclined reflective straight surface 1122 are the same. Among them, the number of the inclined reflective straight surfaces 1122 and the number of the half-wave plates 123 can be 5 to 15.

[0054] In the embodiment of the present invention, by setting the inclination angles of at least two inclined reflective straight surfaces 1122 relative to the optical axis to be different, the uniformity of the light transmitted through the light guiding device 110 can be improved. By setting the number of the inclined reflective straight surfaces 1122 to be the same as the number of the half-wave plates 123 and the areas of the light-emitting surfaces to be the same, the area occupied by the light guiding device 110 can be saved.

[0055] Optionally, on the basis of the above embodiment, the value range of the inclination angle of the inclined reflective straight surface 1122 relative to the optical axis is 0 to 45 degrees.

[0056] Figure 7 is a schematic structural diagram of another light guiding device provided by the embodiment of the present invention, Figure 8 is a schematic structural diagram of another light guiding device provided by the embodiment of the present invention. Optionally, in one embodiment, refer toFigure 2 , Figure 7 and Figure 8 , the light guide device 110 includes a solid light guide rod, a hollow light guide rod, or a quadratic surface light guide rod. In an embodiment of the present invention, the first transmission surface 111 and the first semi-transmissive and semi-reflective surface 112 are disposed opposite to each other; the first reflective surface 113 and the second reflective surface 114 are disposed opposite to each other.

[0057] Wherein, Figure 2 the light guide device 110 in Figure 7 is a solid light guide rod, Figure 8 the light guide device 110 in

[0058] Optionally, on the basis of the above embodiment, Figure 2 , Figure 7 and Figure 8 , the outer contour of the first transmission surface 111 in is circular; the outer contour of the first semi-transmissive and semi-reflective surface 112 is circular; the diameter of the first transmission surface 111 is , the diameter of the first semi-transmissive and semi-reflective surface 112 is ; the emission angle of the light source is ; the exit angle of the light passing through the first semi-transmissive and semi-reflective surface 112 is ; the optical axis length L corresponding to the light guide device 110, the range of L / D2 is 1.5 to 2.5.

[0059] Figure 9 is a schematic structural diagram of another light guide device provided by an embodiment of the present invention. Optionally, in an embodiment, referring to Figure 9 , the light guide device 110 includes a side-entry backplane. In an embodiment of the present invention, the first transmission surface 111 and the first reflective surface 113 are disposed opposite to each other; the second reflective surface 114 and the first semi-transmissive and semi-reflective surface 112 are disposed opposite to each other.

[0060] Optionally, on the basis of the above embodiment, Figure 2 , Figure 7 , Figure 8 and Figure 9 , the outer contour of the first transmission surface 111 in is rectangular; the outer contour of the first semi-transmissive and semi-reflective surface 112 is rectangular; the length of the diagonal of the first transmission surface 111 is , the length of the diagonal of the first semi-transmissive and semi-reflective surface 112 is ; the emission angle of the light source is ; the exit angle of the light passing through the first semi-transmissive and semi-reflective surface 112 is

[0061] Figure 10is a schematic diagram of the structure of an optical machine module provided by an embodiment of the present invention, with reference to Figure 10 An embodiment of the present invention further provides an optical machine module, including: an illumination component 100 and an imaging component 200; the illumination component 100 includes a light source (not shown in the drawings) and a focusing component (including a light guide device 110 and a polarization converter 120) provided in the above embodiment, and the imaging component 200 includes a lens group 210 and a light modulator 220.

[0062] The light source may be an all-in-one LED chip containing at least three colors: red, green and blue, and the LED chip may be adjusted to white light.

[0063] Figure 11 This is a schematic diagram of the structure of an optical machine module in the prior art. Figure 11 The prior art optical machine module includes an illumination optical path 100 and an imaging optical path 200. The prior art illumination optical path 100 uses two lenses 140 plus a fly-eye lens 150 for collimation and homogenization. The prior art illumination optical path 100 has a total length of 7 mm, and the total efficiency of the optical machine module is 35%. Figure 10 and Figure 11 , the embodiment of the present invention adopts and Figure 11 The same imaging optical path 200 matches the lighting design, the field of view of the optical machine module is 50 degrees, the LCOS ratio is 16:9, and the size is 0.25 inches. In the embodiment of the present invention, the light guide device 110 uses a solid light guide rod, the first transmission surface 111 of the light guide device 110 is square in shape, with a size of 1.5mm×1.5mm, the first semi-transparent and semi-reflective surface 112 is square in shape, with a size of 4mm×4mm, the length of the solid light guide rod along the first direction Z is 6mm, the thickness of the polarization converter 120 along the first direction Z is 1mm, and the thickness of the relay lens 130 along the first direction Z is 2mm. The total length of the illumination optical path of the embodiment of the present invention is 9mm, and the total efficiency of the optical machine module is 59%, which is nearly 70% higher than that of the prior art. It can be seen that the solution of the embodiment of the present invention can help improve the brightness of the LCOS optical machine, and the size is only 2mm larger than the prior art, and the miniaturization of the AR optical machine is maintained as much as possible. The reason why the brightness is not doubled as expected in theoretical analysis is that the solid light guide rod lighting emission angle is larger than the prior art solution of using two lenses 140 plus a fly-eye lens 150 for collimation and uniform light, and the imaging coupling efficiency is lower than the prior art solution of using two lenses 140 plus a fly-eye lens 150 for collimation and uniform light.

[0064] Figure 12 is a light distribution diagram of the light-emitting side of the first semi-transparent and semi-reflective surface of a light guide device provided by an embodiment of the present invention, with reference to Figure 12 The light distribution on the light-emitting side of the light-guiding device has reached the spacing requirement of the polarization converter 120, and can make the light emission utilization rate reach more than 90%.

[0065] In summary, by adopting the light condensing component provided by the present invention, the brightness can be improved on the premise of ensuring the small volume of the optical engine module.

[0066] The embodiment of the present invention further provides a near-eye display device, including the optical engine module provided by the above embodiment.

[0067] The near-eye display device provided by the embodiment of the present invention includes the optical engine module provided by the above embodiment, and thus has the same beneficial effects. For the content not described in detail in this embodiment, reference may be made to the optical engine module provided by the above embodiment.

[0068] The above specific implementation manners do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A light condensing component, characterized in that, Comprising: A light guiding device and a polarization converter; The light guiding device includes a first transmissive surface, a first semi-transmissive and semi-reflective surface, a first reflective surface, and a second reflective surface; The polarization converter is disposed on the light-emitting side of the first semi-transmissive and semi-reflective surface; The first semi-transmissive and semi-reflective surface includes a plurality of spherical surfaces extending along a first direction and alternately arranged along a second direction, and inclined reflective straight surfaces inclined with respect to the optical axis, the first direction and the second direction being perpendicular; the polarization converter includes a plurality of polarization beam splitting films extending along the first direction and alternately arranged along the second direction, and 45° reflective films, the polarization converter further includes a plurality of 1 / 2 wave plates, the 1 / 2 wave plates being disposed on a side of the 45° reflective films away from the light guiding device; the polarization beam splitting films are disposed opposite to the spherical surfaces, and the 45° reflective films and the 1 / 2 wave plates are disposed opposite to the inclined reflective straight surfaces; Light emitted from a light source is transmitted through the first transmissive surface, and the first part of the light irradiated on the spherical surface is transmitted through the spherical surface, and the second part of the light irradiated on the inclined reflective straight surface is reflected by the first reflective surface and / or the second reflective surface and then transmitted through the spherical surface; After the first part of the light and the second part of the light transmitted through the spherical surface are incident on the polarization beam splitting film, the first polarized light is transmitted through the polarization beam splitting film, the second polarized light is reflected by the polarization beam splitting film, then reflected by the 45° reflective film, and is transmitted through the 1 / 2 wave plate after being converted into the first polarized light.

2. The condenser assembly according to claim 1, characterized in that, The inclination angles of at least two of the inclined reflective straight surfaces with respect to the optical axis are different, the number of the inclined reflective straight surfaces is the same as the number of the 1 / 2 wave plates, and the areas of the light-emitting surfaces are the same.

3. The light condensing component according to claim 1 or 2, characterized in that, The value range of the inclination angle of the inclined reflective straight surface with respect to the optical axis is 0 to 45 degrees.

4. The light condensing component according to claim 1, wherein The light guiding device includes a solid light guiding rod, a hollow light guiding rod, or a quadratic surface light guiding rod; The first transmissive surface and the first semi-transmissive and semi-reflective surface are disposed opposite to each other; the first reflective surface and the second reflective surface are disposed opposite to each other.

5. The light condensing component according to claim 4, wherein The outer contour of the first transmissive surface is circular; the outer contour of the first semi-transmissive and semi-reflective surface is circular; The diameter of the first transmissive surface is , the diameter of the first semi-transmissive and semi-reflective surface is , and the emission angle of the light source is ; The emission angle of the light passing through the first semi-transparent and semi-reflective surface is For the light guiding device, the length L of the optical axis, and the range of L / D2 is 1.5 to 2.

5.

6. The light condensing component according to claim 1, wherein The light guiding device includes a side-entry backplane; The first transmissive surface and the first reflective surface are disposed opposite to each other; the second reflective surface and the first semi-transmissive and semi-reflective surface are disposed opposite to each other.

7. The condenser assembly according to claim 4 or 6, characterized in that, The outer contour of the first transmissive surface is rectangular; the outer contour of the first semi-transmissive and semi-reflective surface is rectangular; The length of the diagonal of the first transmissive surface is , the length of the diagonal of the first semi-transmissive and semi-reflective surface is , and the emission angle of the light source is ; The exit angle of the light passing through the first semi-transmissive and semi-reflective surface is ; For the light guiding device, the length L of the optical axis, and the range of L / D4 is 1.5 to 2.

5.

8. The light condensing component according to claim 1, wherein The first polarized light is P polarized light, and the second polarized light is S polarized light.

9. An optical-mechanical module, characterized in that, Comprising: An illumination assembly and an imaging assembly; The illumination assembly includes a light source and the light condensing assembly according to any one of claims 1-8, and the imaging assembly includes a lens group and a light modulator.

10. A near-eye display device, characterized in that, Including the optical engine module according to claim 9.

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