CN222050701U - Optical components and projectors - Google Patents

Abstract

The application relates to an optical assembly and a projector. The utility model provides an optical assembly includes installing frame, first printing opacity component, LCD screen, second printing opacity component, first fresnel lens and third printing opacity component, and first liquid cooling chamber is enclosed to first printing opacity component, LCD screen and installing frame, and second liquid cooling chamber is enclosed to LCD screen, second printing opacity component and installing frame, and first fresnel lens, third printing opacity component and installing frame enclose and establish the third liquid cooling chamber. The refractive indexes of the liquid cooling liquid in the first liquid cooling cavity and the liquid cooling liquid in the second liquid cooling cavity are n1 and n2 respectively, the refractive index of a panel of the LCD screen is n3, the absolute value of the difference between n1 and n3 is j1, the absolute value of the difference between n2 and n3 is j2, j1 is more than or equal to 0 and less than or equal to 0.3, and j2 is more than or equal to 0 and less than or equal to 0.3. The optical module can reduce light energy loss, improve optical efficiency and improve heat dissipation effect of the optical module.

Description

Optical assembly and projector

Technical Field

The present application relates to the field of projection technologies, and in particular, to an optical assembly and a projector.

Background

A projector is a device capable of projecting video, images, or text onto a screen for display, and is widely used in homes, offices, schools, movie theatres, and the like.

Since the internal construction of the projector is complicated and many components are sensitive to temperature, heat dissipation problems need to be considered. Therefore, how to effectively dissipate heat and how to improve optical efficiency is a technical problem that needs to be solved by the projector at present.

Disclosure of utility model

Based on this, it is necessary to provide an optical assembly and a projector in view of the problems of how to efficiently dissipate heat and how to improve optical efficiency.

According to a first aspect of the present application, there is provided an optical assembly comprising:

a mounting frame; and

The first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged on the inner peripheral side of the mounting frame at intervals along the first direction;

Wherein, the first light-transmitting element, the LCD screen and the mounting frame enclose a first liquid cooling cavity;

The LCD screen, the second light-transmitting element and the mounting frame are surrounded by a second liquid cooling cavity;

the first Fresnel lens, the third light-transmitting element and the mounting frame are surrounded by a third liquid cooling cavity;

The refractive indexes of the liquid cooling liquid in the first liquid cooling cavity and the liquid cooling liquid in the second liquid cooling cavity are respectively n1 and n2, the refractive index of a panel of the LCD screen is n3, the absolute value of the difference between n1 and n3 is j1, the absolute value of the difference between n2 and n3 is j2, wherein j1 is more than or equal to 0 and less than or equal to 0.3, and j2 is more than or equal to 0 and less than or equal to 0.3.

In one embodiment, the material of the panel of the LCD screen comprises glass.

In one embodiment, the liquid-cooled liquid in the first liquid-cooled chamber and the liquid-cooled liquid in the second liquid-cooled chamber each comprise water or a fluorinated liquid.

In one embodiment, the refractive index of the first light-transmitting element is n4, and the absolute value of the difference between n1 and n4 is j3;

Wherein, j3 is more than or equal to 0 and less than or equal to 0.3.

In one embodiment, the refractive index of the second light-transmitting element is n5, and the absolute value of the difference between n2 and n5 is j4;

Wherein, j4 is more than or equal to 0 and less than or equal to 0.3.

In one embodiment, the refractive index of the liquid-cooled liquid in the third liquid-cooled cavity is n6;

The refractive index of the first Fresnel lens is n7, and the absolute value of the difference between n6 and n7 is j5;

Wherein, j5 is more than or equal to 0 and less than or equal to 0.3.

In one embodiment, the refractive index of the third light-transmitting element is n8, and the absolute value of the difference between n6 and n8 is j6;

Wherein, j6 is more than or equal to 0 and less than or equal to 0.3.

In one embodiment, at least one of the first fresnel lens, the first light-transmitting element, the second light-transmitting element, and the third light-transmitting element is not provided with an antireflection film on a surface in contact with the liquid-cooled liquid.

In one embodiment, n1 and n2 are each 1.2-1.4.

According to a second aspect of the present application, there is provided a projector comprising the optical assembly of any of the embodiments described above.

In the technical scheme of the application, when light rays are incident into one medium from the other medium, reflection occurs at an intersection interface of the two mediums, and the reflectivity is related to the incident angle and the refractive index information of the two mediums, so that j1 is set to be 0-0.3, j2 is set to be 0-0.3, the refractive index difference between liquid cooling liquid in the first liquid cooling cavity and the LCD screen can be reduced, that is, the refractive index of the liquid cooling liquid in the first liquid cooling cavity A is similar to that of the LCD screen, and reflection of the light rays at the contact interface between the LCD screen and the liquid cooling liquid in the first liquid cooling cavity can be effectively reduced; in the same way, the refractive index of the liquid cooling liquid in the second liquid cooling cavity is similar to that of the LCD screen, so that reflection of light rays at a contact interface between the liquid cooling liquid in the second liquid cooling cavity and the LCD screen can be effectively reduced; the first light-transmitting element and the LCD screen can be radiated by the cooling liquid flowing into the first liquid cooling cavity, the LCD screen and the second light-transmitting element can be radiated by the cooling liquid flowing into the second liquid cooling cavity, the first Fresnel lens and the third light-transmitting element can be radiated by the cooling liquid flowing into the third liquid cooling cavity, and the radiating effect of the optical assembly can be improved.

Drawings

Fig. 1 shows a schematic structural diagram of an optical component in an embodiment of the application.

Fig. 2 shows a schematic cross-sectional view of an optical assembly in an embodiment of the application.

Fig. 3 is a schematic structural diagram of an optical engine module according to an embodiment of the application.

Reference numerals:

10. an optical component;

100. A mounting frame; 110. a first frame; 120. a second frame; 130. a third frame;

200. A first light-transmitting element;

300. An LCD screen;

400. a second light-transmitting element;

510. a first seal; 520. a second seal; 530. a third seal; 540. a fourth seal;

610. a first fresnel lens; 620. a second fresnel lens;

700. A third light-transmitting element;

810. A light source; 820. a light-gathering rod; 830. and a lens.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Fig. 1 shows a schematic structural diagram of an optical component 10 according to an embodiment of the present application, and fig. 2 shows a schematic sectional diagram of the optical component 10 according to an embodiment of the present application.

Referring to fig. 1 and 2, according to a first aspect of the present application, an optical assembly 10 includes a mounting frame 100, a first light-transmitting element 200, an LCD screen 300, a second light-transmitting element 400, a first fresnel lens 610 and a third light-transmitting element 700, wherein the first light-transmitting element 200, the LCD screen 300, the second light-transmitting element 400, the first fresnel lens 610 and the third light-transmitting element 700 are disposed at intervals along a first direction F ₁ on an inner peripheral side of the mounting frame 100.

The first light-transmitting element 200, the LCD screen 300 and the mounting frame 100 enclose a first liquid cooling cavity A, the LCD screen 300, the second light-transmitting element 400 and the mounting frame 100 enclose a second liquid cooling cavity B, the first Fresnel lens 610, the third light-transmitting element 700 and the mounting frame 100 enclose a third liquid cooling cavity C, refractive indexes of liquid cooling liquid in the first liquid cooling cavity A and liquid cooling liquid in the second liquid cooling cavity B are respectively n1 and n2, refractive indexes of a panel of the LCD screen 300 are n3, absolute values of differences between n1 and n3 are j1, absolute values of differences between n2 and n3 are j2, wherein j1 is more than or equal to 0 and less than or equal to 0.3, and j2 is more than or equal to 0.3. If j1 is 0.17, 0.2 or 0.25, etc., j2 is 0.17, 0.2 or 0.25, etc.

When light rays are incident into one medium from the other medium, reflection occurs at an intersection interface of the two mediums, and the reflectivity is related to the incident angle and the refractive index information of the two mediums, so that j1 is set to be 0.ltoreq.j1.ltoreq.0.3, j2 is set to be 0.ltoreq.j2.ltoreq.0.3, the refractive index difference between liquid cooling liquid in the first liquid cooling cavity A and the LCD screen 300 can be reduced, that is, the refractive index of the liquid cooling liquid in the first liquid cooling cavity A is relatively similar to that of a panel of the LCD screen 300, and reflection of the light rays at the contact interface between the LCD screen 300 and the liquid cooling liquid in the first liquid cooling cavity A can be effectively reduced; in the same way, the refractive index of the liquid cooling liquid in the second liquid cooling cavity B is similar to that of the panel of the LCD screen 300, so that the reflection of light rays at the contact interface between the liquid cooling liquid in the second liquid cooling cavity B and the LCD screen 300 can be effectively reduced; the optical efficiency can be further improved by reducing the optical energy loss, the first light transmitting element 200 and the LCD panel 300 can be further cooled by the cooling liquid flowing into the first liquid cooling chamber a, the LCD panel 300 and the second light transmitting element 400 can be further cooled by the cooling liquid flowing into the second liquid cooling chamber B, and the first fresnel lens 610 and the third light transmitting element 700 can be further cooled by the cooling liquid flowing into the third liquid cooling chamber C, so that the first light transmitting element 200, the LCD panel 300, the second light transmitting element 400, the first fresnel lens 610 and the third light transmitting element 700 can be well cooled by the liquid cooling heat dissipation, and the heat dissipation effect of the optical assembly 10 can be further improved.

In some embodiments, the first liquid cooling chamber a, the second liquid cooling chamber B, and the third liquid cooling chamber C are disposed in series and/or in parallel. The first liquid cooling cavity A, the second liquid cooling cavity B and the third liquid cooling cavity C are arranged in series; the first liquid cooling cavity A, the second liquid cooling cavity B and the third liquid cooling cavity C can be arranged in parallel; the first liquid cooling cavity A, the second liquid cooling cavity B and the third liquid cooling cavity C are connected in series, and then are connected in parallel with the other one of the first liquid cooling cavity A, the second liquid cooling cavity B and the third liquid cooling cavity C. There is no particular limitation herein.

Because the first liquid cooling cavity a, the second liquid cooling cavity B and the third liquid cooling cavity C are connected in series and/or in parallel, the cooling liquid flowing into the first liquid cooling cavity a can be used for radiating the first light-transmitting element 200 and the LCD panel 300, the cooling liquid flowing into the second liquid cooling cavity B can also be used for radiating the LCD panel 300 and the second light-transmitting element 400, and the cooling liquid flowing into the third liquid cooling cavity C can also be used for radiating the first fresnel lens 610 and the third light-transmitting element 700, so that the liquid cooling radiating mode can be adopted for radiating the first light-transmitting element 200, the LCD panel 300, the second light-transmitting element 400, the first fresnel lens 610 and the third light-transmitting element 700 well, and further the radiating effect of the optical assembly 10 can be improved.

In some embodiments, the material of the panel of LCD screen 300 includes glass.

The LCD screen 300 has glass panels on both sides along the first direction F ₁.

The refractive index of the glass is 1.5, it can be understood that the refractive index of the panel of the LCD screen 300 is approximately 1.5, and the liquid cooling liquid in the first liquid cooling cavity a can be selected according to the refractive index of the panel of the LCD screen 300 to satisfy the condition that j1 is more than or equal to 0 and less than or equal to 0.3, so that the reflection of light at the contact interface between the LCD screen 300 and the liquid cooling liquid in the first liquid cooling cavity a can be effectively reduced, and the optical efficiency can be improved; similarly, the liquid cooling liquid in the second liquid cooling cavity B is selected according to the refractive index of the panel of the LCD screen 300 so as to meet the condition that j2 is more than or equal to 0 and less than or equal to 0.3, and then reflection of light rays at a contact interface between the liquid cooling liquid in the second liquid cooling cavity B and the LCD screen 300 can be effectively reduced, so that optical efficiency is improved.

In some embodiments, n1 and n2 are each 1.2-1.4. Specifically, the liquid cooling liquid in the first liquid cooling cavity a and the liquid cooling liquid in the second liquid cooling cavity B both comprise water or fluorinated liquid.

The refractive index of water is 1.33, the refractive index of the fluorinated liquid is 1.25-1.3, and the two conditions of 0.ltoreq.j1.ltoreq.0.3 and 0.ltoreq.j2.ltoreq.0.3 can be satisfied, so that the reflection of light rays at the contact interface between the LCD screen 300 and the liquid cooling liquid in the first liquid cooling cavity A can be effectively reduced, the reflection of light rays at the contact interface between the liquid cooling liquid in the second liquid cooling cavity B and the LCD screen 300 can be effectively reduced, and the optical efficiency can be improved.

In some embodiments, the refractive index of the first light-transmitting element 200 is n4, and the absolute value of the difference between n1 and n4 is j3, wherein 0.ltoreq.j3.ltoreq.0.3. If j3 is 0.17, 0.2 or 0.25, etc.

Setting j3 to be 0 or less and 0.3 or less can enable the refractive index of the liquid cooling liquid in the first liquid cooling cavity A to be relatively similar to that of the first light transmission element 200, and further can effectively reduce reflection of light rays at a contact interface between the liquid cooling liquid in the first liquid cooling cavity A and the first light transmission element 200, and further can improve the heat dissipation effect of the optical assembly 10 while reducing light energy loss and improving optical efficiency.

In some embodiments, the material of the first light-transmitting element 200 includes glass. Illustratively, the first light transmissive element 200 may comprise a first glass.

The liquid cooling liquid in the first liquid cooling cavity a can be selected according to the refractive index of the panel of the LCD screen 300 and the refractive index of the first light transmitting element 200 to satisfy the two conditions of 0.ltoreq.j1.ltoreq.0.3 and 0.ltoreq.j3.ltoreq.0.3, so that the reflection of light at the contact interface between the LCD screen 300 and the liquid cooling liquid in the first liquid cooling cavity a can be effectively reduced, the reflection of light at the contact interface between the liquid cooling liquid in the first liquid cooling cavity a and the first light transmitting element 200 can be effectively reduced, the light energy loss can be reduced, the optical efficiency can be improved, and the heat dissipation effect of the optical assembly 10 can be improved.

In some embodiments, the refractive index of the second light-transmitting element 400 is n5, and the absolute value of the difference between n2 and n5 is j4, wherein 0.ltoreq.j4.ltoreq.0.3. If j4 is 0.17, 0.2 or 0.25, etc.

Setting j4 to be 0 or less and 0.3 or less can enable the refractive index of the liquid cooling liquid in the second liquid cooling cavity B to be relatively similar to that of the second light transmitting element 400, and further can effectively reduce reflection of light rays at a contact interface between the second light transmitting element 400 and the liquid cooling liquid in the second liquid cooling cavity B, and further can improve the heat dissipation effect of the optical assembly 10 while reducing light energy loss and improving optical efficiency.

In some embodiments, the material of the second light-transmitting element 400 includes glass.

It can be understood that the refractive index of the second light-transmitting element 400 is 1.5, so that the liquid cooling liquid in the second liquid cooling cavity B can be selected according to the refractive index of the panel of the LCD screen 300 and the refractive index of the second light-transmitting element 400 to satisfy the two conditions of 0.ltoreq.j2.ltoreq.0.3 and 0.ltoreq.j4.ltoreq.0.3, thereby effectively reducing the reflection of light at the contact interface between the second light-transmitting element 400 and the liquid cooling liquid in the second liquid cooling cavity B, and also effectively reducing the reflection of light at the contact interface between the liquid cooling liquid in the second liquid cooling cavity B and the LCD screen 300, so as to reduce the loss of light energy, improve the optical efficiency and improve the heat dissipation effect of the optical assembly 10.

In some embodiments, the second light-transmitting element 400 may include heat-insulating glass, and the second light-transmitting element 400 with heat-insulating function is used to isolate the second liquid cooling cavity B and the third liquid cooling cavity C, so as to facilitate improving the heat dissipation effect of the second liquid cooling cavity B and the third liquid cooling cavity C, and further improve the heat dissipation effect of the LCD screen 300 and the first fresnel lens 610.

In some embodiments, the refractive index of the liquid cooling liquid in the third liquid cooling cavity C is n6, the refractive index of the first Fresnel lens 610 is n7, and the absolute value of the difference between n6 and n7 is j5, wherein 0.ltoreq.j5.ltoreq.0.3. If j5 is 0.17, 0.2 or 0.25, etc.

Setting j5 to be 0 or less and 0.3 or less can enable the refractive index of the liquid cooling liquid in the third liquid cooling cavity C to be similar to that of the first Fresnel lens 610, further can effectively reduce reflection of light rays at a contact interface between the liquid cooling liquid in the third liquid cooling cavity C and the first Fresnel lens 610, and further can reduce light energy loss, improve optical efficiency and improve heat dissipation effect of the optical assembly 10.

In some embodiments, the refractive index of the third light-transmitting element 700 is n8, and the absolute value of the difference between n6 and n8 is j6, wherein 0.ltoreq.j6.ltoreq.0.3. If j6 is 0.17, 0.2 or 0.25, etc.

Setting j6 to be 0 or less and 0.3 or less can enable the refractive index of the liquid cooling liquid in the third liquid cooling cavity C to be similar to that of the third light transmitting element 700, further can effectively reduce reflection of light rays at a contact interface between the third light transmitting element 700 and the liquid cooling liquid in the third liquid cooling cavity C, and further can improve the heat dissipation effect of the optical assembly 10 while reducing light energy loss and improving optical efficiency.

In some embodiments, the material of the first fresnel lens 610 comprises glass and the material of the third light transmissive element 700 comprises glass. For example, the third light transmissive element 700 may comprise a third glass.

It can be understood that the refractive indexes of the first fresnel lens 610 and the third light-transmitting element 700 are 1.5, so that the liquid cooling liquid in the third liquid cooling cavity C can be selected according to the refractive index of the first fresnel lens 610 and the refractive index of the third light-transmitting element 700 to satisfy the two conditions that j5 is less than or equal to 0.3 and j6 is less than or equal to 0.3, thereby effectively reducing the reflection of light at the contact interface between the third light-transmitting element 700 and the liquid cooling liquid in the third liquid cooling cavity C, and also effectively reducing the reflection of light at the contact interface between the liquid cooling liquid in the third liquid cooling cavity C and the first fresnel lens 610, so that the heat dissipation effect of the optical assembly 10 can be improved while the light energy loss is reduced and the optical efficiency is improved.

In some embodiments, the liquid-cooled liquid in the third liquid-cooled chamber C comprises water or a fluorinated liquid.

The refractive index of water is 1.33, the refractive index of the fluorinated liquid is 1.25-1.3, and the two conditions of 0.ltoreq.j5.ltoreq.0.3 and 0.ltoreq.j6.ltoreq.0.3 can be satisfied, so that the reflection of light at the contact interface between the third light-transmitting element 700 and the liquid cooling liquid in the third liquid cooling cavity C can be effectively reduced, the reflection of light at the contact interface between the liquid cooling liquid in the third liquid cooling cavity C and the first fresnel lens 610 can be effectively reduced, and the optical efficiency can be improved.

In some embodiments, at least one of the first fresnel lens 610, the first light transmissive element 200, the second light transmissive element 400, and the third light transmissive element 700 is not provided with an anti-reflective film on the surface in contact with the liquid-cooled liquid. Preferably, the first fresnel lens 610, the first light-transmitting element 200, the second light-transmitting element 400, and the third light-transmitting element 700 are not provided with an antireflection film on the surface in contact with the liquid-cooled liquid.

In particular, the method comprises the steps of, j1 is more than or equal to 0 and less than or equal to 0.3, j2 is more than or equal to 0 and less than or equal to 2 not less than 0.3, not less than 0.3 and not more than 0 less than or equal to 0.3, less than or equal to 0 j3 is less than or equal to 0.3, 0.

In this way, the step of providing the antireflection film can be omitted, and the heat radiation effect of the optical assembly 10 can be improved while reducing the light energy loss and improving the optical efficiency.

In some embodiments, a first seal 510 is provided between the first light transmissive element 200 and the mounting frame 100, a second seal 520 is provided between the second light transmissive element 400 and the mounting frame 100, a third seal 530 is provided between the first fresnel lens 610 and the mounting frame 100, and a fourth seal 540 is provided between the third light transmissive element 700 and the mounting frame 100.

Specifically, the mounting frame 100 includes a first frame 110 and a second frame 120 connected along a first direction F ₁, a first seal 510 is disposed between the first light-transmitting element 200 and the first frame 110, a second seal 520 is disposed between the second light-transmitting element 400 and the first frame 110, a third seal 530 is disposed between the first fresnel lens 610 and the second frame 120, and a fourth seal 540 is disposed between the third light-transmitting element 700 and the second frame 120.

The sealing performance of the first liquid cooling cavity a can be improved by using the first sealing member 510, the sealing performance of the second liquid cooling cavity B can be improved by using the second sealing member 520, and the sealing performance of the third liquid cooling cavity C can be improved by using the third sealing member 530 and the fourth sealing member 540, so that the heat dissipation can be better performed on the first light transmitting element 200, the LCD panel 300, the second light transmitting element 400, the first fresnel lens 610 and the third light transmitting element 700, and the performance of the optical assembly 10 can be improved.

In some embodiments, the mounting frame 100 includes a third frame 130 located on a side of the first frame 110 remote from the second frame 120 along the first direction F ₁, and the optical assembly 10 further includes a second fresnel lens 620 disposed on the third frame 130, the second fresnel lens 620 being located on a side of the first light-transmissive element 200 facing away from the LCD screen 300 along the first direction F ₁.

An embodiment of the present application provides a projector, including an optical module, the optical module including the optical component 10 of any of the above embodiments.

Referring to fig. 3, the optical-mechanical module further includes a light source 810, a light-gathering rod 820 and a lens 830, wherein the light emitted by the light source 810 irradiates the optical assembly 10 through the light-gathering rod 820, and the third light-transmitting element 700, the first fresnel lens 610, the second light-transmitting element 400, the LCD screen 300, the first light-transmitting element 200 and the second fresnel lens 620 of the optical assembly 10 are all light-transmitting, so that the light passing through the light-gathering rod 820 can be incident on the lens 830 through the optical assembly 10, and then is transmitted to the screen through the lens 830 to display the picture to be projected on the screen.

In the process of transmitting light through the optical assembly 10, the first liquid cooling cavity a, the second liquid cooling cavity B and the third liquid cooling cavity C can be utilized to well radiate heat from the components such as the first light transmitting element 200, the LCD panel 300, the second light transmitting element 400, the first fresnel lens 610 and the third light transmitting element 700, so that the heat radiation effect of the components such as the first light transmitting element 200, the LCD panel 300, the second light transmitting element 400, the first fresnel lens 610 and the third light transmitting element 700 can be improved, and further the heat radiation effect of the optical assembly 10 can be improved, and in addition, the following conditions can be set: j1 is more than or equal to 0 and less than or equal to 0.3, j2 is more than or equal to 0 and less than or equal to 0.3, j3 is more than or equal to 0 and less than or equal to 0.3,0 j4 is more than or equal to 0.3, j5 is more than or equal to 0 and less than or equal to 0.3, j6 is more than or equal to 0 and less than or equal to 0.3, the step of providing an anti-reflection film may be omitted, and the heat dissipation effect of the optical component 10 can be improved while the light energy loss is reduced and the optical efficiency is improved, so that the quality of a projection picture of the projector is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. An optical component, comprising: mounting frame; and The first light-transmitting element, the LCD screen, the second light-transmitting element, the first Fresnel lens and the third light-transmitting element are arranged at intervals on the inner circumference of the installation frame along the first direction; Wherein, the first light-transmitting element, the LCD screen and the mounting frame enclose a first liquid cooling cavity; The LCD screen, the second light-transmitting element and the mounting frame enclose a second liquid cooling chamber; The first Fresnel lens, the third light-transmitting element and the mounting frame enclose a third liquid cooling cavity; The refractive indexes of the liquid-cooling liquid in the first liquid-cooling cavity and the liquid-cooling liquid in the second liquid-cooling cavity are n1 and n2 respectively, the refractive index of the panel of the LCD screen is n3, the absolute value of the difference between n1 and n3 is j1, and the absolute value of the difference between n2 and n3 is j2, wherein 0≤j1≤0.3, 0≤j2≤0.3. 2 . The optical component according to claim 1 , wherein the panel of the LCD screen is made of glass. 3 . The optical component according to claim 2 , wherein the liquid-cooling liquid in the first liquid-cooling chamber and the liquid-cooling liquid in the second liquid-cooling chamber both comprise water or fluorinated liquid. 4. The optical component according to any one of claims 1 to 3, characterized in that the refractive index of the first light-transmitting element is n4, and the absolute value of the difference between n1 and n4 is j3; Among them, 0≤j3≤0.3. 5. The optical component according to any one of claims 1 to 3, characterized in that the refractive index of the second light-transmitting element is n5, and the absolute value of the difference between n2 and n5 is j4; Among them, 0≤j4≤0.3. 6. The optical component according to any one of claims 1 to 3, characterized in that the refractive index of the liquid-cooling liquid in the third liquid-cooling chamber is n6; The refractive index of the first Fresnel lens is n7, and the absolute value of the difference between n6 and n7 is j5; Among them, 0≤j5≤0.3. 7. The optical assembly according to claim 6, wherein the refractive index of the third light-transmitting element is n8, and the absolute value of the difference between n6 and n8 is j6; Among them, 0≤j6≤0.3. 8. The optical component according to any one of claims 1 to 3, characterized in that at least one of the first Fresnel lens, the first light-transmitting element, the second light-transmitting element and the third light-transmitting element is not provided with an anti-reflection film on the surface in contact with the liquid-cooling liquid. 9. The optical component according to any one of claims 1 to 3, characterized in that n1 and n2 are both 1.2-1.4. 10. A projector, characterized by comprising the optical component according to any one of claims 1-9.