Optical system, optical imaging device and virtual reality equipment

Abstract

The invention relates to the technical field of virtual reality equipment, and discloses an optical system, an optical imaging device and virtual reality equipment. The optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens which are sequentially arranged from an exit pupil plane to an image plane in the optical axis direction, and the effective focal length of the optical system is EFFL. The optical system, the optical imaging device and the virtual reality equipment provided by the invention have the characteristics of large field angle, high resolution and wide working band.

Description

Technical Field

[0001] This application relates to the field of virtual reality equipment technology, and in particular to an optical system, an optical imaging device, and a virtual reality device. Background Technology

[0002] In virtual display devices, optical imaging devices generally include an optical system and a display system. The optical system includes multiple lenses, and the display system includes a miniature display screen. During use, the miniature display screen shows an image, and the emitted light is projected onto the viewer's eye through multiple lenses, creating a virtual image.

[0003] Traditional optical imaging devices have a small field of view, low resolution, and narrow operating band, making it difficult to provide users with a realistic visual perception of interaction with the real world, resulting in a poor user experience for virtual display devices. Summary of the Invention

[0004] This application provides an optical system, an optical imaging device, and a virtual reality device, which have the characteristics of a large field of view, high resolution, and wide operating wavelength.

[0005] In a first aspect, embodiments of this application provide an optical system comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged sequentially along the optical axis from the exit pupil plane to the image plane. The effective focal length of the optical system is EFFL, wherein...

[0006] The image-side focal length f1 of the first lens satisfies: -4.10 < (f1 / EFFL) < -2.73;

[0007] The image-side focal length f2 of the second lens satisfies: -6.10 < (f2 / EFFL) < -4.06;

[0008] The image-side focal length f3 of the third lens satisfies: -5.08 < (f3 / EFFL) < -3.39;

[0009] The image-side focal length f4 of the fourth lens satisfies: 1.49 < (f4 / EFFL) < 2.23;

[0010] The image-side focal length f5 of the fifth lens satisfies: -4.72 < (f5 / EFFL) < -3.14;

[0011] The image-side focal length f6 of the sixth lens satisfies: -5.61 < (f6 / EFFL) < -3.744;

[0012] The image-side focal length f7 of the seventh lens satisfies: -3.96 < (f7 / EFFL) < -2.64;

[0013] The image-side focal length f8 of the eighth lens satisfies: 1.60 < (f8 / EFFL) < 2.40;

[0014] The image-side focal length f9 of the ninth lens satisfies: -6.16 < (f9 / EFFL) < -4.10;

[0015] The image-side focal length f of the tenth lens 10 Satisfies: -2.67 < (f) 10 / EFFL)<-1.78;

[0016] The image-side focal length f of the eleventh lens 11 Satisfy: 1.20 < (f) 11 / EFFL)<1.81;

[0017] The air gap d between the first lens and the second lens 12 Satisfies: -0.26 < (d) 12 / EFFL)<-0.18;

[0018] The air gap d between the second lens and the third lens 23 Satisfies: -1.67 < (d) 23 / EFFL)<-1.11;

[0019] The air gap d between the third lens and the fourth lens 34 Satisfies: -0.96 < (d) 34 / EFFL)<-0.64;

[0020] The air gap d between the fourth lens and the fifth lens 45 Satisfies: -1.66 < (d) 45 / EFFL)<-1.11;

[0021] The air gap d between the fifth lens and the sixth lens 56 Satisfies: -6.93 < (d) 56 / EFFL)<-4.62;

[0022] The air gap d between the sixth lens and the seventh lens 67 Satisfies: -0.07 < (d) 67 / EFFL)<-0.04;

[0023] The seventh lens is fitted together with the eighth lens;

[0024] The air gap d between the eighth lens and the ninth lens 89 Satisfy: -1.32 < (d)89 / EFFL)<-0.88;

[0025] The air gap d between the ninth lens and the tenth lens 910 Satisfies: -1.58 < (d) 910 / EFFL)<-1.06;

[0026] The air gap d between the tenth lens and the eleventh lens 1011 Satisfy: -0.50 < (d) 1011 / EFFL)<-0.34;

[0027] The back focal length BFL of the optical system satisfies: -0.69 < (BFL / EFFL) < -0.46.

[0028] In some of these embodiments,

[0029] The shape factor X1 of the first lens satisfies: -1.73 <X1<-1.15;

[0030] The shape factor X2 of the second lens satisfies: 0.59 <X2<0.89;

[0031] The shape factor X3 of the third lens satisfies: 3.60 <X3<5.41;

[0032] The shape factor X4 of the fourth lens satisfies: 0 <X4<0.01;

[0033] The shape factor X5 of the fifth lens satisfies: -0.61 <X5<-0.41;

[0034] The shape factor X6 of the sixth lens satisfies: 0.23 <X6<0.34;

[0035] The shape factor X7 of the seventh lens satisfies: 0.08 <X7<0.11;

[0036] The shape factor X8 of the eighth lens satisfies: -0.3 <X8<-0.2;

[0037] The shape factor X9 of the ninth lens satisfies: 0.91 <X9<1.36;

[0038] The shape factor X of the tenth lens 10 Satisfaction: 0.93 <X 10 <1.39;

[0039] The shape factor X of the eleventh lens 11 Satisfies: -0.61 <X 11 <-0.40.

[0040] In some of these embodiments,

[0041] The center thickness T1 of the first lens satisfies: -0.95 < (T1 / EFFL) < -0.63;

[0042] The center thickness T2 of the second lens satisfies: -1.60 < (T2 / EFFL) < -1.07;

[0043] The center thickness T3 of the third lens satisfies: -1.47 < (T3 / EFFL) < -0.98;

[0044] The center thickness T4 of the fourth lens satisfies: -1.5 < (T4 / EFFL) < -1;

[0045] The center thickness T5 of the fifth lens satisfies: -1.55 < (T5 / EFFL) < -1.03;

[0046] The center thickness T6 of the sixth lens satisfies: -1.57 < (T6 / EFFL) < -1.04;

[0047] The center thickness T7 of the seventh lens satisfies: -0.74 < (T7 / EFFL) < -0.49;

[0048] The center thickness T8 of the eighth lens satisfies: -1.43 < (T8 / EFFL) < -0.95;

[0049] The center thickness T9 of the ninth lens satisfies: -1.49 < (T9 / EFFL) < -0.99;

[0050] The center thickness T of the tenth lens 10 Satisfies: -0.94 < (T) 10 / EFFL)<-0.63;

[0051] The center thickness T of the eleventh lens 11 Satisfy: -0.3 < (T) 11 / EFFL)<-0.2.

[0052] In some of these embodiments,

[0053] -3.80 < (f1 / EFFL) < -3.03, -1.53 <X1<-1.35,-0.85<(T1 / EFFL)<-0.73;

[0054] And / or, -5.80 < (f2 / EFFL) < -4.36, 0.69 <X2<0.79,-1.40<(T2 / EFFL)<-1.27;

[0055] And / or, -4.78 < (f3 / EFFL) < -3.69, 3.90 <X3<5.11,-1.27<(T3 / EFFL)<-1.18;

[0056] And / or, 1.79 < (f4 / EFFL) < 1.93, 0.002 <X4<0.008,-1.3<(T4 / EFFL)<-1.1;

[0057] And / or, -4.42 < (f5 / EFFL) < -3.44, -0.56 <X5<-0.46,-1.35<(T5 / EFFL)<-1.23;

[0058] And / or, -5.51 < (f6 / EFFL) < -4.24, 0.26 <X6<0.31,-1.37<(T6 / EFFL)<-1.24;

[0059] And / or, -3.66 < (f7 / EFFL) < -2.94, 0.09 <X7<0.10,-0.69<(T7 / EFFL)<-0.54;

[0060] And / or, 1.80 < (f8 / EFFL) < 2.20, -0.28 <X8<-0.22,-1.38<(T8 / EFFL)<-1.0;

[0061] And / or, -5.66 < (f9 / EFFL) < -4.60, 1.01 <X9<1.26,-1.39<(T9 / EFFL)<-1.09;

[0062] And / or, -2.37 < (f 10 / EFFL)<-2.08, 1.03 <X 10 <1.29, -0.84<(T) 10 / EFFL)<-0.73;

[0063] and / or, 1.40 < (f 11 / EFFL)<1.61, -0.56 <X 11 <-0.45, -0.27<(T) 11 / EFFL)<-0.23.

[0064] In some of these embodiments,

[0065] -0.24<(d 12 / EFFL)<-0.20;

[0066] and / or, -1.47 < (d 23 / EFFL)<-1.31;

[0067] And / or, -0.86 < (d 34 / EFFL)<-0.74;

[0068] And / or, -1.46 < (d 45 / EFFL)<-1.31;

[0069] and / or, -6.13<(d 56 / EFFL)<-5.42;

[0070] And / or, -0.06 < (d 67 / EFFL)<-0.05;

[0071] And / or, -1.22 < (d 89 / EFFL)<-0.98;

[0072] and / or, -1.38 < (d 910 / EFFL)<-1.26;

[0073] and / or, -0.45 < (d 1011 / EFFL)<-0.39.

[0074] In some of these embodiments, -0.61 < (BFL / EFFL) < -0.54.

[0075] In some embodiments, the optical system includes an angle deflection assembly located along the optical axis between the first lens and the eleventh lens, the angle deflection assembly being used to change the direction of light rays propagating from the eleventh lens to the first lens.

[0076] In some embodiments, the angle deflection component includes a prism or a plane mirror.

[0077] In some embodiments, the angle deflection assembly is located between the fifth lens and the sixth lens, and the angle deflection assembly is used to change the direction of the light rays propagating from the sixth lens to the fifth lens by 180 degrees.

[0078] In some embodiments, the angle deflection component includes a first plane mirror and a second plane mirror, and the light can change its propagation direction after being reflected by the second plane mirror and the first plane mirror in sequence.

[0079] Secondly, embodiments of this application provide an optical imaging device, comprising:

[0080] The optical system as described in the first aspect;

[0081] The display system is located at the image plane.

[0082] Thirdly, embodiments of this application provide a virtual reality device, including the optical imaging apparatus as described in the second aspect.

[0083] The optical system provided in this application has the following advantages: it has the characteristics of a large field of view, high resolution and wide operating wavelength.

[0084] The advantages of the optical imaging device provided in this application compared to the prior art and the advantages of the virtual reality device provided in this application compared to the prior art are similar to the advantages of the optical system provided in this application compared to the prior art, and will not be repeated here. Attached Figure Description

[0085] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0086] Figure 1 This is a schematic diagram of the optical system in one embodiment of this application;

[0087] Figure 2 yes Figure 1 The MTF (Modulation Transfer Function) curve of the optical system is shown.

[0088] Figure 3 yes Figure 1 The graph shows how the field curvature and distortion of the optical system change as the field of view increases.

[0089] The markings in the diagram mean:

[0090] 101. Exit pupil plane; 102. Image plane;

[0091] 10. First lens; 20. Second lens; 30. Third lens; 40. Fourth lens; 50. Fifth lens; 60. Sixth lens; 70. Seventh lens; 80. Eighth lens; 90. Ninth lens; 100. Tenth lens; 110. Eleventh lens; 120. Angle deflection assembly; 121. First plane mirror; 122. Second plane mirror. Detailed Implementation

[0092] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0093] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0095] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0096] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0097] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the optical system in one embodiment of this application.

[0098] In a first aspect, embodiments of this application provide an optical system comprising a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a first reflecting mirror, a second reflecting mirror, a sixth lens 60, a seventh lens 70, an eighth lens 80, a ninth lens 90, a tenth lens 100, and an eleventh lens 110 arranged sequentially along the optical axis from the exit pupil surface 101 to the image surface 102, wherein the effective focal length of the optical system is EFFL.

[0099] The exit pupil plane 101 refers to the image of the aperture stop in the optical system within the system's image space. It is the common exit point for the imaging beams from all points on the object plane after passing through the system; it can also be understood as the "Fourier surface" of the image. The image plane 102 refers to the image area formed at a specific location in the optical system after light is refracted or reflected by a lens or other optical elements. The effective focal length is the distance from the front and rear principal planes to the corresponding focal points.

[0100] The image-side focal length f1 of the first lens 10 satisfies: -4.10 < (f1 / EFFL) < -2.73.

[0101] In an optical system, the image-side focal length refers to the distance from the image-side principal plane to the image-side focal point.

[0102] Optionally, -3.80 < (f1 / EFFL) < -3.03.

[0103] For example, the value of (f1 / EFFL) can be -4.09, -3.80, -3.50, -3.03, or -2.74, etc.

[0104] The image-side focal length f2 of the second lens 20 satisfies: -6.10 < (f2 / EFFL) < -4.06.

[0105] Optionally, -5.80 < (f2 / EFFL) < -4.36.

[0106] For example, the value of (f2 / EFFL) can be -6.09, -5.80, -5.10, -4.36, or -4.07, etc.

[0107] The image-side focal length f3 of the third lens 30 satisfies: -5.08 < (f3 / EFFL) < -3.39.

[0108] Alternatively, -4.78 < (f3 / EFFL) < -3.69.

[0109] For example, the value of (f3 / EFFL) can be -5.07, -4.78, -4.18, -3.69, or -3.40, etc.

[0110] The image-side focal length f4 of the fourth lens 40 satisfies: 1.49 < (f4 / EFFL) < 2.23.

[0111] Alternatively, 1.79 < (f4 / EFFL) < 1.93.

[0112] For example, the value of (f4 / EFFL) can be 1.50, 1.79, 1.85, 1.93, or 2.22, etc.

[0113] The image-side focal length f5 of the fifth lens 50 satisfies: -4.72 < (f5 / EFFL) < -3.14.

[0114] Optionally, -4.42 < (f5 / EFFL) < -3.44.

[0115] For example, the value of (f5 / EFFL) can be -4.71, -4.42, -3.95, -3.44, or -3.15, etc.

[0116] The image-side focal length f6 of the sixth lens 60 satisfies: -5.61 < (f6 / EFFL) < -3.74.

[0117] Optionally, -5.51 < (f6 / EFFL) < -4.24.

[0118] For example, the value of (f6 / EFFL) can be -5.60, -5.51, -4.96, -4.24, or -3.75, etc.

[0119] The image-side focal length f7 of the seventh lens 70 satisfies: -3.96 < (f7 / EFFL) < -2.64.

[0120] Optionally, -3.66 < (f7 / EFFL) < -2.94.

[0121] For example, the value of (f7 / EFFL) can be -3.95, -3.66, -3.27, -2.94, or -2.65, etc.

[0122] The image-side focal length f8 of the eighth lens 80 satisfies: 1.60 < (f8 / EFFL) < 2.40.

[0123] Optionally, 1.80 < (f8 / EFFL) < 2.20.

[0124] For example, the value of (f8 / EFFL) can be 1.61, 1.80, 2.00, 2.20, or 2.39, etc.

[0125] The image-side focal length f9 of the ninth lens 90 satisfies: -6.16 < (f9 / EFFL) < -4.10.

[0126] Optionally, -5.66 < (f9 / EFFL) < -4.60.

[0127] For example, the value of (f9 / EFFL) can be -6.15, -5.66, -5.18, -4.60, or -4.11, etc.

[0128] The image-side focal length f of the tenth lens 100 10 Satisfies: -2.67 < (f) 10 / EFFL)<-1.78.

[0129] Alternatively, -2.37 < (f 10 / EFFL)<-2.08.

[0130] For example, (f 10 The value of / EFFL can be -2.66, -2.37, -2.18, -2.08, or -1.79, etc.

[0131] The image-side focal length f of the eleventh lens 110 11 Satisfy: 1.20 < (f) 11 / EFFL)<1.81.

[0132] Optionally, 1.40 < (f 11 / EFFL)<1.61.

[0133] For example, (f 11 The value of / EFFL can be 1.21, 1.40, 1.51, 1.61 or 1.80, etc.

[0134] The air gap d between the first lens 10 and the second lens 20 12 Satisfies: -0.26 < (d) 12 / EFFL)<-0.18.

[0135] Air gap refers to the distance between lenses.

[0136] Optionally, -0.24 < (d 12 / EFFL)<-0.20.

[0137] For example, (d 12 The value of / EFFL can be -0.25, -0.24, -0.22, -0.20, or -0.19, etc.

[0138] The air gap d between the second lens 20 and the third lens 30 23 Satisfies: -1.67 < (d) 23 / EFFL)<-1.11.

[0139] Optionally, -1.47 < (d 23 / EFFL)<-1.31.

[0140] For example, (d 23 The value of / EFFL can be -1.66, -1.47, -1.39, -1.31 or -1.12, etc.

[0141] The air gap d between the third lens 30 and the fourth lens 40 34Satisfies: -0.96 < (d) 34 / EFFL)<-0.64.

[0142] Optionally, -0.86 < (d 34 / EFFL)<-0.74.

[0143] For example, (d 34 The value of / EFFL can be -0.95, -0.86, -0.79, -0.74, or -0.65, etc.

[0144] The air gap d between the fourth lens 40 and the fifth lens 50 45 Satisfies: -1.66 < (d) 45 / EFFL)<-1.11.

[0145] Optionally, -1.46 < (d 45 / EFFL)<-1.31.

[0146] For example, (d 45 The value of / EFFL can be -1.65, -1.46, -1.38, -1.31, or -1.12, etc.

[0147] The air gap d between the fifth lens 50 and the sixth lens 60 56 Satisfies: -6.93 < (d) 56 / EFFL)<-4.62.

[0148] Optionally, -6.13 < (d 56 / EFFL)<-5.42.

[0149] For example, (d 56 The value of / EFFL can be -6.92, -6.13, -5.78, -5.42 or -4.63, etc.

[0150] The air gap d between the sixth lens 60 and the seventh lens 70 67 Satisfies: -0.07 < (d) 67 / EFFL)<-0.04.

[0151] Optionally, -0.06 < (d 67 / EFFL)<-0.05.

[0152] For example, (d 67 The value of / EFFL can be -0.065, -0.06, -0.055, -0.05, or -0.045, etc.

[0153] The seventh lens 70 and the eighth lens 80 are fitted together.

[0154] Optionally, the seventh lens 70 and the eighth lens 80 are cemented together.

[0155] The air gap d between the eighth lens 80 and the ninth lens 90 89 Satisfy: -1.32 < (d) 89 / EFFL)<-0.88.

[0156] Optionally, -1.22 < (d 89 / EFFL)<-0.98.

[0157] For example, (d 89 The value of / EFFL can be -1.33, -1.22, -1.11, -0.98, or -0.89, etc.

[0158] The air gap d between the ninth lens 90 and the tenth lens 100 910 Satisfies: -1.58 < (d) 910 / EFFL)<-1.06.

[0159] Optionally, -1.38 < (d 910 / EFFL)<-1.26.

[0160] For example, (d 910 The value of / EFFL can be -1.57, -1.38, -1.31, -1.26, or -1.07, etc.

[0161] The air gap d between the tenth lens 100 and the eleventh lens 110 1011 Satisfy: -0.50 < (d) 1011 / EFFL)<-0.34.

[0162] Optionally, -0.45 < (d 1011 / EFFL)<-0.39.

[0163] For example, (d 1011 The value of / EFFL can be -0.49, -0.45, -0.40, -0.39, or -0.35, etc.

[0164] The back focal length BFL of the optical system satisfies: -0.69 < (BFL / EFFL) < -0.46.

[0165] Back focal length is the distance from the vertex of the last optical surface of an optical system to the rear focal point.

[0166] Optionally, -0.61 < (BFL / EFFL) < -0.54.

[0167] For example, the value of (BFL / EFFL) can be -0.68, -0.61, -0.58, -0.54, or -0.47, etc.

[0168] By adopting the above-described scheme, the optical system provided in this application embodiment has the characteristics of a large field of view, high resolution, and wide operating wavelength.

[0169] The optical system provided in this application not only has a large field of view, with a full 70° field of view, but also high resolution, with the MTF of both the center and edge fields of view being greater than 0.2 at 70 LP / mm. Furthermore, the optical system provided in this application has a wide operating wavelength range of 430nm-680nm, covering the spectrum of microdisplays.

[0170] In this embodiment, the shape factor X1 of the first lens 10 satisfies: -1.73 <X1<-1.15。

[0171] In optical systems, the shape factor is a ratio that describes the surface curvature of a lens shape, typically ranging from -2 to +2.

[0172] Optionally, -1.53 <X1<-1.35。

[0173] For example, the value of X1 can be -1.72, -1.53, -1.46, -1.35, or -1.16, etc.

[0174] The shape factor X2 of the second lens 20 satisfies: 0.59 <X2<0.89。

[0175] Optionally, 0.69 <X2<0.79。

[0176] For example, the value of X2 can be 0.60, 0.69, 0.79, 0.85, or 0.88, etc.

[0177] The shape factor X3 of the third lens 30 satisfies: 3.60 <X3<5.41。

[0178] Optionally, 3.90 <X3<5.11。

[0179] For example, the value of X3 can be 3.61, 3.90, 4.23, 5.11, or 5.40, etc.

[0180] The shape factor X4 of the fourth lens 40 satisfies: 0 <X4<0.01。

[0181] Optionally, 0.002 <X4<0.008。

[0182] For example, the value of X4 can be 0.001, 0.002, 0.006, 0.008, or 0.009, etc.

[0183] The shape factor X5 of the fifth lens 50 satisfies: -0.61 <X5<-0.41。

[0184] Optionally, -0.56 <X5<-0.46。

[0185] For example, the value of X5 can be -0.60, -0.56, -0.51, -0.46, or -0.42, etc.

[0186] The shape factor X6 of the sixth lens 60 satisfies: 0.23 <X6<0.34。

[0187] Optionally, 0.26 <X6<0.31。

[0188] For example, the value of X6 can be 0.24, 0.26, 0.28, 0.31, or 0.33, etc.

[0189] The form factor X7 of the seventh lens 70 satisfies: 0.08 <X7<0.11。

[0190] Optionally, 0.09 <X7<0.10。

[0191] For example, the value of X7 can be 0.085, 0.09, 0.095, 0.10, or 0.105, etc.

[0192] The form factor X8 of the eighth lens 80 satisfies: -0.3 <X8<-0.2。

[0193] Optionally, -0.28 <X8<-0.22。

[0194] For example, the value of X8 can be -0.29, -0.28, -0.25, -0.22, or -0.21, etc.

[0195] The shape factor X9 of the ninth lens 90 satisfies: 0.91 <X9<1.36。

[0196] Optionally, 1.01 <X9<1.26。

[0197] For example, the value of X9 can be 0.92, 1.01, 1.15, 1.26, or 1.35, etc.

[0198] The shape factor X of the tenth lens 100 10 Satisfaction: 0.93 <X 10 <1.39.

[0199] Optionally, 1.03 <X 10 <1.29.

[0200] For example, X 10The value can be 0.94, 1.03, 1.16, 1.29 or 1.38, etc.

[0201] The shape factor X of the eleventh lens 110 11 Satisfies: -0.61 <X 11 <-0.40.

[0202] Optionally, -0.56 <X 11 <-0.45.

[0203] For example, X 11 The value can be -0.60, -0.56, -0.51, -0.45, or -0.41, etc.

[0204] In this embodiment, the center thickness T1 of the first lens 10 satisfies: -0.95 < (T1 / EFFL) < -0.63.

[0205] In optical systems, the center thickness of an aspherical lens refers to the thickness of the lens at its center.

[0206] Optionally, -0.85 < (T1 / EFFL) < -0.73.

[0207] For example, the value of (T1 / EFFL) can be -0.94, -0.85, -0.80, -0.73, or -0.64, etc.

[0208] The center thickness T2 of the second lens 20 satisfies: -1.60 < (T2 / EFFL) < -1.07.

[0209] Optionally, -1.40 < (T2 / EFFL) < -1.27.

[0210] For example, the value of (T2 / EFFL) can be -1.59, -1.40, -1.32, -1.27, or -1.08, etc.

[0211] The center thickness T3 of the third lens 30 satisfies: -1.47 < (T3 / EFFL) < -0.98.

[0212] Optionally, -1.27 < (T3 / EFFL) < -1.18.

[0213] For example, the value of (T3 / EFFL) can be -1.46, -1.27, -1.23, -1.18, or -0.99, etc.

[0214] The center thickness T4 of the fourth lens 40 satisfies: -1.5 < (T4 / EFFL) < -1.

[0215] Optionally, -1.3 < (T4 / EFFL) < -1.1.

[0216] For example, the value of (T4 / EFFL) can be -1.49, -1.3, -1.2, -1.1, or -1.05, etc.

[0217] The center thickness T5 of the fifth lens 50 satisfies: -1.55 < (T5 / EFFL) < -1.03.

[0218] Optionally, -1.35 < (T5 / EFFL) < -1.23.

[0219] For example, the value of (T5 / EFFL) can be -1.54, -1.35, -1.29, -1.23, or -1.04, etc.

[0220] The center thickness T6 of the sixth lens 60 satisfies: -1.57 < (T6 / EFFL) < -1.04.

[0221] Optionally, -1.37 < (T6 / EFFL) < -1.24.

[0222] For example, the value of (T6 / EFFL) can be -1.56, -1.37, -1.30, -1.24, or -1.05, etc.

[0223] The center thickness T7 of the seventh lens 70 satisfies: -0.74 < (T7 / EFFL) < -0.49.

[0224] Optionally, -0.69 < (T7 / EFFL) < -0.54.

[0225] For example, the value of (T7 / EFFL) can be -0.73, -0.69, -0.61, -0.54, or -0.50, etc.

[0226] The center thickness T8 of the eighth lens 80 satisfies: -1.43 < (T8 / EFFL) < -0.95.

[0227] Optionally, -1.38 < (T8 / EFFL) < -1.0.

[0228] For example, the value of (T8 / EFFL) can be -1.42, -1.38, -1.21, -1.0, or -0.96, etc.

[0229] The center thickness T9 of the ninth lens 90 satisfies: -1.49 < (T9 / EFFL) < -0.99.

[0230] Optionally, -1.39 < (T9 / EFFL) < -1.09.

[0231] For example, the value of (T9 / EFFL) can be -1.48, -1.39, -1.21, -1.09, or -1.00, etc.

[0232] The center thickness T of the tenth lens 100 10 Satisfies: -0.94 < (T) 10 / EFFL)<-0.63.

[0233] Optionally, -0.84 < (T) 10 / EFFL)<-0.73.

[0234] For example, (T) 10 The value of / EFFL can be -0.93, -1.12, -1.21, -0.73, or -0.64, etc.

[0235] The center thickness T of the eleventh lens 110 11 Satisfy: -0.3 < (T) 11 / EFFL)<-0.2.

[0236] Optionally, -0.27 < (T) 11 / EFFL)<-0.23.

[0237] For example, (T) 11 The value of / EFFL can be -0.29, -0.27, -0.25, -0.23, or -0.21, etc.

[0238] To avoid an excessively large size of the optical system in the direction parallel to the straight line when the first lens 10, second lens 20, third lens 30, fourth lens 40, fifth lens 50, first reflector, second reflector, sixth lens 60, seventh lens 70, eighth lens 80, ninth lens 90, tenth lens 100, and eleventh lens 110 are arranged sequentially along a straight line, this embodiment includes an angle deflection component 120 located along the optical axis between the first lens 10 and the eleventh lens 110. The angle deflection component 120 is used to change the direction of light rays propagating from the eleventh lens 110 to the first lens 10. This arrangement reduces the size of the optical system.

[0239] Optionally, the angle deflection component 120 includes a prism or a plane mirror.

[0240] In this embodiment, the angle deflection component 120 is located between the fifth lens 50 and the sixth lens 60, and the angle deflection component 120 is used to change the direction of light rays propagating from the sixth lens 60 to the fifth lens 50 by 180 degrees. This arrangement can further reduce the size of the optical system.

[0241] Specifically, the angle deflection component 120 includes a first plane mirror 121 and a second plane mirror 122. Light rays can change their propagation direction after being reflected sequentially by the second plane mirror 122 and the first plane mirror 121. This configuration makes the structure of the angle deflection component 120 relatively simple.

[0242] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 2 yes Figure 1 The MTF curve of the optical system shown is as follows. Figure 3 yes Figure 1 The graph shows how the field curvature and distortion of the optical system change as the field of view increases.

[0243] MTF is the ratio of the modulation density of the image to the modulation density of the object. It is a function of spatial frequency, which is usually expressed in the form of 1p / mm. The MTF curve is plotted by expressing the fidelity of the lens in reproducing the contrast of the subject onto the image plane (102) in terms of spatial frequency characteristics.

[0244] Figure 2 The image shows the meridional MTF curves for 0°, 12°, 25°, and 35° fields of view. Solid lines represent meridional MTF curves, dashed lines represent sagittal MTF curves, and different colors represent different fields of view. The optical system provided in this embodiment has an MTF value greater than 0.3 at 70 lp / mm for the center field of view and greater than 0.2 at the edge field of view, exhibiting high resolution.

[0245] Figure 3 The solid line represents the field curvature variation curve in the meridional plane, and the dashed line represents the field curvature variation curve in the sagittal plane. Different colored curves represent field curvature and distortion curves for different wavelengths. The optical system provided in this application embodiment has a sagittal field curvature of 0.1230 mm, a meridional field curvature of 0.1620 mm, and a distortion of 12.03% at the edge field of view, which meets the performance requirements.

[0246] Secondly, embodiments of this application provide an optical imaging device, including a display system and an optical system as described in the first aspect, wherein the display system is disposed at the image plane 102.

[0247] The optical imaging device provided in this application has the characteristics of a large field of view, high resolution, and wide operating wavelength.

[0248] Optionally, the display system may include a microdisplay.

[0249] Thirdly, embodiments of this application provide a virtual reality device, including the optical imaging apparatus as described in the second aspect.

[0250] The virtual reality device provided in this application has the characteristics of a large field of view, high resolution, and wide operating wavelength.

[0251] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An optical system, characterized in that, The optical system comprises a first lens (10), a second lens (20), a third lens (30), a fourth lens (40), a fifth lens (50), a sixth lens (60), a seventh lens (70), an eighth lens (80), a ninth lens (90), a tenth lens (100), and an eleventh lens (110) arranged sequentially along the optical axis from the exit pupil plane (101) to the image plane (102). The effective focal length of the optical system is EFFL. The image-side focal length f1 of the first lens (10) satisfies: -4.10 < (f1 / EFFL) < -2.73; The image-side focal length f2 of the second lens (20) satisfies: -6.10 < (f2 / EFFL) < -4.06; The image-side focal length f3 of the third lens (30) satisfies: -5.08 < (f3 / EFFL) < -3.39; The image-side focal length f4 of the fourth lens (40) satisfies: 1.49 < (f4 / EFFL) < 2.23; The image-side focal length f5 of the fifth lens (50) satisfies: -4.72 < (f5 / EFFL) < -3.14; The image-side focal length f6 of the sixth lens (60) satisfies: -5.61 < (f6 / EFFL) < -3.74; The image-side focal length f7 of the seventh lens (70) satisfies: -3.96 < (f7 / EFFL) < -2.64; The image-side focal length f8 of the eighth lens (80) satisfies: 1.60 < (f8 / EFFL) < 2.40; The image-side focal length f9 of the ninth lens (90) satisfies: -6.16 < (f9 / EFFL) < -4.10; The image-side focal length f of the tenth lens (100) 10 Satisfies: -2.67 < (f) 10 / EFFL)<-1.78; The image-side focal length f of the eleventh lens (110) 11 Satisfy: 1.20 < (f) 11 / EFFL)<1.81; The air gap d between the first lens (10) and the second lens (20) 12 Satisfies: -0.26 < (d) 12 / EFFL)<-0.18; The air gap d between the second lens (20) and the third lens (30) 23 Satisfies: -1.67 < (d) 23 / EFFL)<-1.11; The air gap d between the third lens (30) and the fourth lens (40) 34 Satisfies: -0.96 < (d) 34 / EFFL)<-0.64; The air gap d between the fourth lens (40) and the fifth lens (50) 45 Satisfies: -1.66 < (d) 45 / EFFL)<-1.11; The air gap d between the fifth lens (50) and the sixth lens (60) 56 Satisfies: -6.93 < (d) 56 / EFFL)<-4.62; The air gap d between the sixth lens (60) and the seventh lens (70) 67 Satisfies: -0.07 < (d) 67 / EFFL)<-0.04; The seventh lens (70) is fitted together with the eighth lens (80); The air gap d between the eighth lens (80) and the ninth lens (90) 89 Satisfy: -1.32 < (d) 89 / EFFL)<-0.88; The air gap d between the ninth lens (90) and the tenth lens (100) 910 Satisfies: -1.58 < (d) 910 / EFFL)<-1.06; The air gap d between the tenth lens (100) and the eleventh lens (110) 1011 Satisfy: -0.50 < (d) 1011 / EFFL)<-0.34; The back focal length BFL of the optical system satisfies: -0.69 < (BFL / EFFL) < -0.

46.

2. The optical system according to claim 1, characterized in that, The shape factor X1 of the first lens (10) satisfies: -1.73 <X1<-1.15; The shape factor X2 of the second lens (20) satisfies: 0.59 <X2<0.89; The shape factor X3 of the third lens (30) satisfies: 3.60 <X3<5.41; The shape factor X4 of the fourth lens (40) satisfies: 0 <X4<0.01; The shape factor X5 of the fifth lens (50) satisfies: -0.61 <X5<-0.41; The shape factor X6 of the sixth lens (60) satisfies: 0.23 <X6<0.34; The shape factor X7 of the seventh lens (70) satisfies: 0.08 <X7<0.11; The shape factor X8 of the eighth lens (80) satisfies: -0.3 <X8<-0.2; The shape factor X9 of the ninth lens (90) satisfies: 0.91 <X9<1.36; The shape factor X of the tenth lens (100) 10 Satisfaction: 0.93 <X 10 <1.39; The shape factor X of the eleventh lens (110) 11 Satisfies: -0.61 <X 11 <-0.

40.

3. The optical system according to claim 2, characterized in that, The center thickness T1 of the first lens (10) satisfies: -0.95 < (T1 / EFFL) < -0.63; The center thickness T2 of the second lens (20) satisfies: -1.60 < (T2 / EFFL) < -1.07; The center thickness T3 of the third lens (30) satisfies: -1.47 < (T3 / EFFL) < -0.98; The center thickness T4 of the fourth lens (40) satisfies: -1.5 < (T4 / EFFL) < -1; The center thickness T5 of the fifth lens (50) satisfies: -1.55 < (T5 / EFFL) < -1.03; The center thickness T6 of the sixth lens (60) satisfies: -1.57 < (T6 / EFFL) < -1.04; The center thickness T7 of the seventh lens (70) satisfies: -0.74 < (T7 / EFFL) < -0.49; The center thickness T8 of the eighth lens (80) satisfies: -1.43 < (T8 / EFFL) < -0.95; The center thickness T9 of the ninth lens (90) satisfies: -1.49 < (T9 / EFFL) < -0.99; The center thickness T of the tenth lens (100) 10 Satisfies: -0.94 < (T) 10 / EFFL)<-0.63; The center thickness T of the eleventh lens (110) 11 Satisfy: -0.3 < (T) 11 / EFFL)<-0.

2.

4. The optical system according to claim 3, characterized in that, -3.80 < (f1 / EFFL) < -3.03, -1.53 <X1<-1.35,-0.85<(T1 / EFFL)<-0.73; And / or, -5.80 < (f2 / EFFL) < -4.36, 0.69 <X2<0.79,-1.40<(T2 / EFFL)<-1.27; And / or, -4.78 < (f3 / EFFL) < -3.69, 3.90 <X3<5.11,-1.27<(T3 / EFFL)<-1.18; And / or, 1.79 < (f4 / EFFL) < 1.93, 0.002 <X4<0.008,-1.3<(T4 / EFFL)<-1.1; And / or, -4.42 < (f5 / EFFL) < -3.44, -0.56 <X5<-0.46,-1.35<(T5 / EFFL)<-1.23; And / or, -5.51 < (f6 / EFFL) < -4.24, 0.26 <X6<0.31,-1.37<(T6 / EFFL)<-1.24; And / or, -3.66 < (f7 / EFFL) < -2.94, 0.09 <X7<0.10,-0.69<(T7 / EFFL)<-0.54; And / or, 1.80 < (f8 / EFFL) < 2.20, -0.28 <X8<-0.22,-1.38<(T8 / EFFL)<-1.0; And / or, -5.66 < (f9 / EFFL) < -4.60, 1.01 <X9<1.26,-1.39<(T9 / EFFL)<-1.09; And / or, -2.37 < (f 10 / EFFL)<-2.08, 1.03 <X 10 <1.29, -0.84<(T) 10 / EFFL)<-0.73; and / or, 1.40 < (f 11 / EFFL)<1.61, -0.56 <X 11 <-0.45, -0.27<(T) 11 / EFFL)<-0.

23.

5. The optical system according to claim 1, characterized in that, -0.24<(d 12 / EFFL)<-0.20; and / or, -1.47 < (d 23 / EFFL)<-1.31; And / or, -0.86 < (d 34 / EFFL)<-0.74; And / or, -1.46 < (d 45 / EFFL)<-1.31; and / or, -6.13<(d 56 / EFFL)<-5.42; And / or, -0.06 < (d 67 / EFFL)<-0.05; And / or, -1.22 < (d 89 / EFFL)<-0.98; and / or, -1.38 < (d 910 / EFFL)<-1.26; and / or, -0.45 < (d 1011 / EFFL)<-0.

39.

6. The optical system according to claim 1, characterized in that, -0.61 < (BFL / EFFL) < -0.

54.

7. The optical system according to any one of claims 1 to 6, characterized in that, The optical system includes an angle deflection assembly (120) located along the optical axis between the first lens (10) and the eleventh lens (110), the angle deflection assembly (120) being used to change the direction of light rays propagating from the eleventh lens (110) to the first lens (10).

8. The optical system according to claim 7, characterized in that, The angle deflection component (120) includes a prism or a plane mirror.

9. The optical system according to claim 7, characterized in that, The angle deflection component (120) is located in the Between the fifth lens (50) and the sixth lens (60), the angle deflection assembly (120) is used to change the direction of the light rays propagating from the sixth lens (60) to the fifth lens (50) by 180 degrees.

10. The optical system according to claim 9, characterized in that, The angle deflection component (120) includes a first plane mirror (121) and a second plane mirror (122). The light can change its propagation direction after being reflected by the second plane mirror (122) and the first plane mirror (121) in sequence.

11. An optical imaging device, characterized in that, include: The optical system as described in any one of claims 1 to 10; The display system is located at the image plane (102).

12. A virtual reality device, characterized in that, Includes the optical imaging device as described in claim 11.

Images