CN116299983A - Near-to-eye display module detection lens - Google Patents
Near-to-eye display module detection lens Download PDFInfo
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- CN116299983A CN116299983A CN202310526464.5A CN202310526464A CN116299983A CN 116299983 A CN116299983 A CN 116299983A CN 202310526464 A CN202310526464 A CN 202310526464A CN 116299983 A CN116299983 A CN 116299983A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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Abstract
The invention discloses a near-eye display module detection lens, which comprises a diaphragm, a front lens group, a rear lens group and a photoelectric detector, wherein the diaphragm, the front lens group, the rear lens group and the photoelectric detector are sequentially arranged along the optical axis direction, the front lens group is an eyepiece lens system with positive focal power, the eyepiece lens system consists of a first lens unit, a third lens unit, a fourth lens unit and a second lens unit which are sequentially arranged along the optical axis direction, the rear lens group is an objective lens system with negative focal power, the rear lens group consists of a seventh lens, an eighth lens, a ninth lens, a tenth lens, a third lens unit, a fourth lens unit and a fifteenth lens which are sequentially arranged along the optical axis direction, and parameters of all lenses are reasonably arranged. The device has a large field angle, can effectively improve the edge illuminance, inhibit stray light and improve the accuracy and resolution of detection of various indexes of the near-eye display module.
Description
Technical Field
The invention belongs to the technical field of optical lenses, and particularly relates to a near-to-eye display module detection lens.
Background
In recent years, along with the continuous development of social productivity and scientific technology, the relative demands of various industries on near-to-eye display technology are increasingly vigorous, and along with the proposal and continuous heating of the concept of "Yuan universe", AR/VR is more coming to a big burst. The near-eye display module is used as the core hardware of the AR/VR, the development process of the near-eye display module is determined to a certain extent, and it is important to accurately and effectively detect the performance index of the near-eye display module. Because the industry is a novel industry, in the process of exploring and researching, the existing optical detection system in the current market has the phenomena of small FOV, low resolution, inaccurate detection and the like, and no more mature and reliable test system and device exist.
Disclosure of Invention
The invention aims to solve the problems and provide a near-eye display module detection lens which can increase the angle of view, effectively improve the edge illuminance, inhibit stray light and improve the accuracy and resolution of detection of various indexes of the near-eye display module.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a near-eye display module detection lens, which is applied to detection of a near-eye display module and comprises a diaphragm, a front lens group, a rear lens group and a photoelectric detector which are sequentially arranged along an optical axis direction, wherein the front lens group is an eyepiece lens system with positive focal power, the eyepiece lens system consists of a first lens unit, a third lens unit, a fourth lens and a second lens unit which are sequentially arranged along the optical axis direction, the rear lens group is an objective lens system with negative focal power, and the objective lens system consists of a seventh lens, an eighth lens, a ninth lens, a tenth lens, a third lens unit, a fourth lens unit and a fifteenth lens which are sequentially arranged along the optical axis direction, and the following conditions are satisfied:
20mm<f A <50mm，-90mm<f B <-40mm；
wherein f A F is the focal length of the front lens group B Is the focal length of the rear lens group.
Preferably, the near-eye display module detection lens further satisfies the following conditions:
-55mm<f A1 <-40mm，50mm<f 3 <60mm，90mm<f 4 <110mm，-300mm<f A2 <-285mm，
200mm<f 7 <220mm，140mm<f 8 <155mm，-190mm<f 9 <-175mm，65mm<f 10 <80mm，
-45mm<f B3 <-30mm，25mm<f B4 <35mm，30mm<f 15 <45mm
wherein f A1 、f A2 、f B3 、f B4 Focal lengths of the first lens unit, the second lens unit, the third lens unit and the fourth lens unit in sequence, f 3 、f 4 、f 7 、f 8 、f 9 、f 10 、f 15 The focal lengths of the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the fifteenth lens are sequentially arranged.
Preferably, the first lens unit is composed of a first lens and a second lens cemented, the second lens unit is composed of a fifth lens and a sixth lens cemented, the third lens unit is composed of an eleventh lens and a twelfth lens cemented, the fourth lens unit is composed of a thirteenth lens and a fourteenth lens cemented, and the following condition is satisfied:
-13mm<f 1 <-6mm，15mm<f 2 <25mm；-280mm<f 5 <-260mm，-165mm<f 6 <-150mm；40mm<f 11 <55mm，-15mm<f 12 <-5mm；-30mm<f 13 <-20mm，20mm<f 14 <30mm；
wherein f 1 、f 2 、f 5 、f 6 、f 11 、f 12 、f 13 、f 14 The focal lengths of the first lens, the second lens, the fifth lens, the sixth lens, the eleventh lens, the twelfth lens, the thirteenth lens and the fourteenth lens are sequentially arranged.
Preferably, the light incident surface of the first lens is a concave surface, and the light emergent surface is a convex surface and has negative focal power;
the light incident surface of the second lens is a concave surface, the emergent surface is a convex surface and has positive focal power;
the light incident surface of the third lens is a concave surface, the emergent surface is a convex surface and has positive focal power;
the light incident surface of the fourth lens is a convex surface, and the light emergent surface of the fourth lens is a convex surface and has positive focal power;
the light incident surface of the fifth lens is a convex surface, and the emergent surface of the fifth lens is a convex surface and has negative focal power;
the light incident surface of the sixth lens is a concave surface, the emergent surface is a convex surface and has negative focal power;
the light incident surface of the seventh lens is a convex surface, and the emergent surface is a convex surface and has positive focal power;
the light incident surface of the eighth lens is a convex surface, the emergent surface is a concave surface and has positive focal power;
the light incident surface of the ninth lens is a concave surface, the emergent surface is a convex surface and has negative focal power;
the light incident surface of the tenth lens is a convex surface, the emergent surface is a concave surface and has positive focal power;
the light incident surface of the eleventh lens is a convex surface, the light emergent surface is a concave surface, and the eleventh lens has positive focal power;
the light incident surface of the twelfth lens is a convex surface, the light emergent surface is a concave surface and has negative focal power;
the light incident surface of the thirteenth lens is a concave surface, the emergent surface is a convex surface and has negative focal power;
the light incident surface of the fourteenth lens is a concave surface, the emergent surface is a convex surface and has positive focal power;
the light incident surface of the fifteenth lens is a convex surface, and the light emergent surface is a convex surface and has positive focal power.
Preferably, the near-eye display module detection lens further satisfies the following conditions:
1.75<n 1 <2.0，1.68<n 2 <1.9，1.5<n 3 <1.78，1.55<n 4 <1.78，1.4<n 5 <1.7，
1.65<n 6 <1.89，1.55<n 7 <1.85，1.62<n 8 <1.95，1.6<n 9 <1.95，1.7<n 10 <2.0，
1.6<n 11 <1.9，1.45<n 12 <1.7，1.45<n 13 <1.78，1.62<n 14 <1.92，1.7<n 15 <2.0；
25≤Vd 1 <65，30≤Vd 2 <65，40<Vd 3 <75，40<Vd 4 <75，50<Vd 5 <90，
15<Vd 6 <40，35≤Vd 7 <68，15≤Vd 8 <45，15<Vd 9 <55，20<Vd 10 <55，
15<Vd 11 <40，45<Vd 12 <75，45<Vd 13 <75，15<Vd 14 <35，15<Vd 15 <35；
wherein n is 1 ~ n 15 Refractive index, vd, of the first lens to fifteenth lens in this order 1 ~ Vd 15 The abbe numbers of the first lens to the fifteenth lens are in order.
Preferably, the near-eye display module detection lens further satisfies the following conditions:
2.5<T 1 <8，4<T 2 <11，3<T 3 <15，5<T 4 <35，3.5<T 5 <22，3<T 6 <15，
6<T 7 <25，5<T 8 <32，3<T 9 <25，5<T 10 <22，1.5<T 11 <6，2.5<T 12 <15，
2.5<T 13 <10，2.5<T 14 <10，3<T 15 <15；
wherein T is 1 ~ T 15 The thicknesses of the first lens to the fifteenth lens are sequentially measured in mm.
Preferably, the near-eye display module detection lens further satisfies the following conditions:
0≤W1<1.5，0<W2<1，0.1<W3<1.5，0.1<W4<2.5，0≤W5<1，
10<W6<65，2＜W7<55，1<W8<35，7<W9<42，3.5<W10<25，
0≤W11<1.2，1<W12<7.5，0≤W13<1.2，1<W14<7.5，12<W15<25；
wherein W1-W14 are the air intervals of adjacent lenses in the first lens to the fifteenth lens in sequence, and W15 is the air interval of the fifteenth lens and the optical detector, and the unit is mm.
Preferably, the method comprises the steps of, the aperture diameters of the mirrors of the first lens to the fifteenth lens in the optical axis direction are 11mm, 23mm, 27.5mm, 39mm, 41mm, 48mm, 54mm 57mm, 88mm, 90mm, 86mm, 82mm, 62mm, 60mm, 49mm, 42mm, 20mm, 14mm, 8mm, 12mm, 18mm, 22mm, 24mm.
Preferably, each lens is a spherical lens.
Preferably, a field stop is provided at the relay imaging surface position of the front lens group.
Preferably, the near-eye display module is one of an AR optical module, a VR optical module, a HUD module and a diffraction waveguide sheet.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an optical system for detecting a near-eye display module, which adopts an optical system with a front diaphragm and a conical shape, and comprises a front lens group and a rear lens group, wherein the front lens group adopts a large-view-field visual system, the view angle of the optical system is increased to 100 degrees, the rear lens group is designed into a telecentric light path, the edge illuminance of the optical system is effectively improved, the problem of inaccurate detection is solved, the whole framework is designed into a conical shape framework, and light rays in the middle of the front lens group and the rear lens group are converged and imaged, so that the ordering and convergence of the light rays are ensured, stray light can be effectively restrained, and the accuracy and resolution of detecting various indexes of the near-eye display module are improved.
Drawings
FIG. 1 is a schematic diagram of a detection lens of a near-to-eye display module according to the present invention;
FIG. 2 is a ray trace of a near-to-eye display module inspection lens according to the present invention;
FIG. 3 is a graph of MTF for an embodiment of the present invention;
FIG. 4 is a graph of vertical axis color difference for an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating the operation of the near-eye display module inspection lens according to the present invention.
Description of the embodiments
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It is noted that unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 1 to 5, a near-eye display module detection lens is applied to detection of a near-eye display module, and comprises a diaphragm ST1, a front lens group a, a rear lens group B and a photodetector IMA which are sequentially arranged along an optical axis direction, wherein the front lens group a is an eyepiece lens system with positive focal power, and consists of a first lens unit, a third lens L3, a fourth lens L4 and a second lens unit which are sequentially arranged along the optical axis direction, the rear lens group B is an objective lens system with negative focal power, and consists of a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, a third lens unit, a fourth lens unit and a fifteenth lens L15 which are sequentially arranged along the optical axis direction, and the following conditions are satisfied:
20mm<f A <50mm，-90mm<f B <-40mm；
wherein f A F is the focal length of the front lens group A B Is the focal length of the rear lens group B.
The optical system is required to be designed because directional distribution light rays emitted by any single point in the near-eye display module are required to be converted into transverse distribution light rays, and the whole visible angle light ray cone can be collected on a single focal plane, namely, angle information is converted into length information. The principle is that a fourier optical element is used to map the light emitting point to the photodetector IMA so that each pixel corresponds to a different light emitting angle; thereby the relevant optical performance index of the near-eye display module can be accurately and effectively detected. The fourier optical element is the near-eye display module detection lens (conical optical system) provided by the invention.
The near-eye display module detection lens adopts a conical framework, wherein a large-view-field visual system is adopted through the front lens group A, the view angle FOV of the system is effectively increased, and light is gathered and imaged in the middle, which is called a relay imaging surface, a view field diaphragm ST2 can be added at the position of the relay imaging surface, so that the angle of light can be restrained, stray light is effectively inhibited, the light entering the rear lens group B is ensured to be free of stray light, the light finally entering the photoelectric detector IMA is the effective light of the system, and the accuracy of finally measuring the performance of the near-eye display module is achieved; when the light passes through the rear lens group B, the rear lens group is designed into a telecentric light path system, the light rays can be contracted for imaging, and finally, the light rays are contracted for imaging to the photo detector IMA; the principal ray entering into each view field on the photoelectric detector IMA is parallel to the optical axis, so that the final imaging is ensured to be matched with the target surface size of the photoelectric detector IMA, and the principal ray is fully transmitted to the photoelectric detector IMA and is fully distributed on the whole photoelectric detector IMA; and then the tested performance index is output through photoelectric signal conversion of the photoelectric detector IMA, so that the characteristics of large FOV, clear imaging and effective stray light inhibition are finally realized.
In an embodiment, the near-eye display module detection lens further satisfies the following conditions:
-55mm<f A1 <-40mm，50mm<f 3 <60mm，90mm<f 4 <110mm，-300mm<f A2 <-285mm，
200mm<f 7 <220mm，140mm<f 8 <155mm，-190mm<f 9 <-175mm，65mm<f 10 <80mm，
-45mm<f B3 <-30mm，25mm<f B4 <35mm，30mm<f 15 <45mm
wherein f A1 、f A2 、f B3 、f B4 Focal lengths of the first lens unit, the second lens unit, the third lens unit and the fourth lens unit in sequence, f 3 、f 4 、f 7 、f 8 、f 9 、f 10 、f 15 The focal lengths of the third lens L3, the fourth lens L4, the seventh lens L7, the eighth lens L8, the ninth lens L9, the tenth lens L10, and the fifteenth lens L15 are in this order.
In an embodiment, the first lens unit is composed of a first lens L1 and a second lens L2 cemented, the second lens unit is composed of a fifth lens L5 and a sixth lens L6 cemented, the third lens unit is composed of an eleventh lens L11 and a twelfth lens L12 cemented, the fourth lens unit is composed of a thirteenth lens L13 and a fourteenth lens L14 cemented, and the following condition is satisfied:
-13mm<f 1 <-6mm，15mm<f 2 <25mm；-280mm<f 5 <-260mm，-165mm<f 6 <-150mm；40mm<f 11 <55mm，-15mm<f 12 <-5mm；-30mm<f 13 <-20mm，20mm<f 14 <30mm；
wherein f 1 、f 2 、f 5 、f 6 、f 11 、f 12 、f 13 、f 14 The focal lengths of the first lens L1, the second lens L2, the fifth lens L5, the sixth lens L6, the eleventh lens L11, the twelfth lens L12, the thirteenth lens L13, and the fourteenth lens L14 are in this order. The use of a cemented lens helps correct chromatic aberration.
In an embodiment, the light incident surface of the first lens L1 is a concave surface, and the light emergent surface is a convex surface and has negative focal power;
the light incident surface of the second lens L2 is a concave surface, and the emergent surface is a convex surface and has positive focal power;
the light incident surface of the third lens L3 is a concave surface, the emergent surface is a convex surface and has positive focal power;
the light incident surface of the fourth lens L4 is a convex surface, and the light emergent surface is a convex surface and has positive focal power;
the light incident surface of the fifth lens L5 is a convex surface, and the emergent surface is a convex surface and has negative focal power;
the light incident surface of the sixth lens L6 is a concave surface, and the emergent surface is a convex surface and has negative focal power;
the light incident surface of the seventh lens L7 is a convex surface, and the emergent surface is a convex surface and has positive focal power;
the light incident surface of the eighth lens L8 is a convex surface, the emergent surface is a concave surface and has positive focal power;
the light incident surface of the ninth lens L9 is a concave surface, the emergent surface is a convex surface, and the lens has negative focal power;
the light incident surface of the tenth lens L10 is a convex surface, and the light emergent surface is a concave surface and has positive focal power;
the light incident surface of the eleventh lens L11 is a convex surface, the light emergent surface is a concave surface, and the eleventh lens L11 has positive focal power;
the light incident surface of the twelfth lens L12 is a convex surface, and the light emergent surface is a concave surface and has negative focal power;
the light incident surface of the thirteenth lens L13 is a concave surface, the emergent surface is a convex surface and has negative focal power;
the light incident surface of the fourteenth lens L14 is a concave surface, the emergent surface is a convex surface and has positive focal power;
the light incident surface of the fifteenth lens L15 is a convex surface, and the light emergent surface is a convex surface and has positive optical power.
It is easy to understand that the shape of each lens can be adjusted according to actual requirements.
In an embodiment, the near-eye display module detection lens further satisfies the following conditions:
1.75<n 1 <2.0，1.68<n 2 <1.9，1.5<n 3 <1.78，1.55<n 4 <1.78，1.4<n 5 <1.7，
1.65<n 6 <1.89，1.55<n 7 <1.85，1.62<n 8 <1.95，1.6<n 9 <1.95，1.7<n 10 <2.0，
1.6<n 11 <1.9，1.45<n 12 <1.7，1.45<n 13 <1.78，1.62<n 14 <1.92，1.7<n 15 <2.0；
25≤Vd 1 <65，30≤Vd 2 <65，40<Vd 3 <75，40<Vd 4 <75，50<Vd 5 <90，
15<Vd 6 <40，35≤Vd 7 <68，15≤Vd 8 <45，15<Vd 9 <55，20<Vd 10 <55，
15<Vd 11 <40，45<Vd 12 <75，45<Vd 13 <75，15<Vd 14 <35，15<Vd 15 <35；
wherein n is 1 ~ n 15 Refractive index, vd, of the first lens L1 to the fifteenth lens L15 in this order 1 ~ Vd 15 The abbe numbers of the first lens L1 to the fifteenth lens L15 are in this order.
In an embodiment, the near-eye display module detection lens further satisfies the following conditions:
2.5<T 1 <8，4<T 2 <11，3<T 3 <15，5<T 4 <35，3.5<T 5 <22，3<T 6 <15，
6<T 7 <25，5<T 8 <32，3<T 9 <25，5<T 10 <22，1.5<T 11 <6，2.5<T 12 <15，
2.5<T 13 <10，2.5<T 14 <10，3<T 15 <15；
wherein T is 1 ~ T 15 The thicknesses of the first lens L1 to the fifteenth lens L15 are in order, in mm.
In an embodiment, the near-eye display module detection lens further satisfies the following conditions:
0≤W1<1.5，0<W2<1，0.1<W3<1.5，0.1<W4<2.5，0≤W5<1，
10<W6<65，2＜W7<55，1<W8<35，7<W9<42，3.5<W10<25，
0≤W11<1.2，1<W12<7.5，0≤W13<1.2，1<W14<7.5，12<W15<25；
wherein W1-W14 are the air intervals of adjacent lenses in the first lens L1-fifteenth lens L15 in sequence, W15 is the air interval of the fifteenth lens L15 and the optical detector, and the unit is mm. It is readily understood that the air gap is 0 when the lens is cemented.
In one embodiment of the present invention, in one embodiment, the aperture diameters of the mirrors of the first lens L1 to the fifteenth lens L15 in the optical axis direction are 11mm, 23mm, 27.5mm, 39mm, 41mm, 48mm, 54mm 54mm, 57mm, 88mm, 90mm, 86mm, 82mm, 62mm, 60mm, 49mm, 42mm, 20mm, 14mm, 8mm, 12mm, 18mm, 22mm, 24mm. The aperture of each mirror surface is reasonably arranged to enable the near-to-eye display module detection lens to form a conical framework, the front lens group A effectively increases the field angle FOV of the system, and when the light passes through the rear lens group B, the light is contracted to form images, and finally the images are contracted to be formed on the photoelectric detector IMA to be matched with the target surface size of the photoelectric detector IMA.
In one embodiment, each lens is a spherical lens. It should be noted that the material of each lens may be selected according to practical requirements, such as plastic or glass.
In one embodiment, the relay imaging surface position of the front lens group a is provided with a field stop ST2. By arranging the view field diaphragm ST2 at the position of the relay imaging surface, the angle of light can be restrained, stray light is effectively restrained, the light finally entering the photoelectric detector IMA is the effective light of the system, and the accuracy of performance measurement of the near-eye display module is improved.
In one embodiment, the near-to-eye display module is one of an AR optical module, a VR optical module, a HUD module, and a diffraction waveguide plate. It is readily understood that the detected near-eye display module includes, but is not limited to, the above types, and is also applicable to detection of other near-eye display devices in the prior art.
The following is a detailed description of specific examples. The optical parameters of this example are shown in table 1.
TABLE 1
In table 1, S1 represents an object side surface, W2 represents an image side surface, and a standard surface is a spherical surface. The lens includes, but is not limited to, the dimensions of the above photodetectors, and specific performance parameters can be seen from table 1 in conjunction with fig. 3 and 4 as follows:
(1) MTF represents the degree of attenuation of the contrast (i.e., amplitude) of a sinusoidal intensity distribution function at various frequencies after imaging through an optical system. It can comprehensively reflect the imaging properties of the optical system. As shown in fig. 3, the MTF curve of the near-eye display module detection lens of the embodiment shows that the spatial frequency of all the fields of view of the optical system exceeds 0.2 at the position of 200 lp/mm, and has better imaging quality and high resolution.
(2) The vertical axis chromatic aberration can influence the imaging quality of the edge of an object, so that the edge of an image presents color, and the imaging definition is reduced; and therefore must be corrected for larger field of view optical systems. Fig. 4 is a vertical axis color difference graph of the detection lens of the near-to-eye display module in this embodiment, and the graph shows that the chromatic aberration of magnification is the largest under the full field, and the value is smaller than 3 μm, so the chromatic aberration of magnification of the system has little influence on the imaging measurement of the optical system.
(3) The distortion is used for indicating the distortion degree of the image after the image passes through the optical system, the distortion of the system is negative distortion and appears in a barrel shape, and distortion correction can be further carried out through software in the prior art, so that the designed optical system is a FOV with a large field angle and gives consideration to indexes such as definition, chromatic aberration and the like.
As shown in fig. 5, two application scenarios of the near-eye display module detection lens 1 are shown, wherein (a) the near-eye display module 2 in the figure comprises a display image source 21 and a lens group 22, and light rays emitted by the display image source 21 enter the near-eye display module detection lens 1 through the lens group 22 to be detected, photoelectric signal conversion is realized through a photoelectric detector IMA, and tested performance indexes are output; (b) In the figure, the near-eye display module 2 comprises a display image source 21, a lens group 22 and a coupler 23, wherein light rays emitted by the display image source 21 enter the coupler 23 through the lens group 22, after being processed by the coupler 23, enter the near-eye display module detection lens 1 for detection, photoelectric signal conversion is realized through a photoelectric detector IMA, and the tested performance index is output.
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-described embodiments are merely representative of the more specific and detailed embodiments described herein and are not to be construed as limiting the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (11)
1. Near-to-eye display module assembly detects camera lens is applied to near-to-eye display module assembly's detection, its characterized in that: the near-to-eye display module detection lens comprises a diaphragm, a front lens group, a rear lens group and a photoelectric detector, wherein the diaphragm, the front lens group, the rear lens group and the photoelectric detector are sequentially arranged along the optical axis direction, the front lens group is an eyepiece lens system with positive focal power, the eyepiece lens system consists of a first lens unit, a third lens unit, a fourth lens unit and a second lens unit, the first lens unit, the third lens unit, the fourth lens unit and the second lens unit are sequentially arranged along the optical axis direction, the rear lens group is an objective lens system with negative focal power, the seventh lens, the eighth lens, the ninth lens, the tenth lens unit, the third lens unit, the fourth lens unit and the fifteenth lens are sequentially arranged along the optical axis direction, and the following conditions are met:
20mm<f A <50mm，-90mm<f B <-40mm；
wherein f A F is the focal length of the front lens group B Is the focal length of the rear lens group.
2. The near-eye display module inspection lens of claim 1, wherein: the near-eye display module detection lens also meets the following conditions:
-55mm<f A1 <-40mm，50mm<f 3 <60mm，90mm<f 4 <110mm，-300mm<f A2 <-285mm，
200mm<f 7 <220mm，140mm<f 8 <155mm，-190mm<f 9 <-175mm，65mm<f 10 <80mm，
-45mm<f B3 <-30mm，25mm<f B4 <35mm，30mm<f 15 <45mm
wherein f A1 、f A2 、f B3 、f B4 Focal lengths f of the first lens unit, the second lens unit, the third lens unit and the fourth lens unit are sequentially set 3 、f 4 、f 7 、f 8 、f 9 、f 10 、f 15 And the focal lengths of the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the fifteenth lens are sequentially set.
3. The near-eye display module inspection lens of claim 2, wherein: the first lens unit is composed of a first lens and a second lens, the second lens unit is composed of a fifth lens and a sixth lens, the third lens unit is composed of an eleventh lens and a twelfth lens, the fourth lens unit is composed of a thirteenth lens and a fourteenth lens, and the following conditions are satisfied:
-13mm<f 1 <-6mm，15mm<f 2 <25mm；-280mm<f 5 <-260mm，-165mm<f 6 <-150mm；40mm<f 11 <55mm，-15mm<f 12 <-5mm；-30mm<f 13 <-20mm，20mm<f 14 <30mm；
wherein f 1 、f 2 、f 5 、f 6 、f 11 、f 12 、f 13 、f 14 The focal lengths of the first lens, the second lens, the fifth lens, the sixth lens, the eleventh lens, the twelfth lens, the thirteenth lens and the fourteenth lens are sequentially arranged.
4. The near-eye display module inspection lens of claim 3, wherein:
the light incident surface of the first lens is a concave surface, the emergent surface of the first lens is a convex surface, and the first lens has negative focal power;
the light incident surface of the second lens is a concave surface, the emergent surface of the second lens is a convex surface, and the second lens has positive focal power;
the light incident surface of the third lens is a concave surface, the light emergent surface of the third lens is a convex surface, and the third lens has positive focal power;
the light incident surface of the fourth lens is a convex surface, and the light emergent surface of the fourth lens is a convex surface and has positive focal power;
the light incident surface of the fifth lens is a convex surface, and the light emergent surface of the fifth lens is a convex surface and has negative focal power;
the light incident surface of the sixth lens is a concave surface, the light emergent surface is a convex surface and has negative focal power;
the light incident surface of the seventh lens is a convex surface, and the emergent surface of the seventh lens is a convex surface and has positive focal power;
the light incident surface of the eighth lens is a convex surface, the light emergent surface is a concave surface, and the eighth lens has positive focal power;
the light incident surface of the ninth lens is a concave surface, the emergent surface of the ninth lens is a convex surface, and the ninth lens has negative focal power;
the light incident surface of the tenth lens is a convex surface, the light emergent surface is a concave surface, and the tenth lens has positive focal power;
the light incident surface of the eleventh lens is a convex surface, the light emergent surface is a concave surface, and the eleventh lens has positive focal power;
the light incident surface of the twelfth lens is a convex surface, the light emergent surface is a concave surface, and the twelfth lens has negative focal power;
the light incident surface of the thirteenth lens is a concave surface, the emergent surface is a convex surface and has negative focal power;
the light incident surface of the fourteenth lens is a concave surface, the emergent surface of the fourteenth lens is a convex surface, and the fourteenth lens has positive focal power;
the light incident surface of the fifteenth lens is a convex surface, and the light emergent surface is a convex surface and has positive focal power.
5. The near-eye display module inspection lens of claim 3, wherein: the near-eye display module detection lens also meets the following conditions:
1.75<n 1 <2.0，1.68<n 2 <1.9，1.5<n 3 <1.78，1.55<n 4 <1.78，1.4<n 5 <1.7，
1.65<n 6 <1.89，1.55<n 7 <1.85，1.62<n 8 <1.95，1.6<n 9 <1.95，1.7<n 10 <2.0，
1.6<n 11 <1.9，1.45<n 12 <1.7，1.45<n 13 <1.78，1.62<n 14 <1.92，1.7<n 15 <2.0；
25≤Vd 1 <65，30≤Vd 2 <65，40<Vd 3 <75，40<Vd 4 <75，50<Vd 5 <90，
15<Vd 6 <40，35≤Vd 7 <68，15≤Vd 8 <45，15<Vd 9 <55，20<Vd 10 <55，
15<Vd 11 <40，45<Vd 12 <75，45<Vd 13 <75，15<Vd 14 <35，15<Vd 15 <35；
wherein n is 1 ~ n 15 Refractive index, vd, of the first lens to the fifteenth lens in order 1 ~ Vd 15 The abbe numbers of the first lens to the fifteenth lens are sequentially set.
6. The near-eye display module inspection lens of claim 3, wherein: the near-eye display module detection lens also meets the following conditions:
2.5<T 1 <8，4<T 2 <11，3<T 3 <15，5<T 4 <35，3.5<T 5 <22，3<T 6 <15，
6<T 7 <25，5<T 8 <32，3<T 9 <25，5<T 10 <22，1.5<T 11 <6，2.5<T 12 <15，
2.5<T 13 <10，2.5<T 14 <10，3<T 15 <15；
wherein T is 1 ~ T 15 The thicknesses of the first lens to the fifteenth lens are sequentially measured in mm.
7. The near-eye display module inspection lens of claim 3, wherein: the near-eye display module detection lens also meets the following conditions:
0≤W1<1.5，0<W2<1，0.1<W3<1.5，0.1<W4<2.5，0≤W5<1，
10<W6<65，2＜W7<55，1<W8<35，7<W9<42，3.5<W10<25，
0≤W11<1.2，1<W12<7.5，0≤W13<1.2，1<W14<7.5，12<W15<25；
wherein W1-W14 are the air intervals of adjacent lenses in the first lens to the fifteenth lens in sequence, and W15 is the air interval of the fifteenth lens and the optical detector, and the unit is mm.
8. The near-eye display module inspection lens of claim 3, wherein: the aperture of each mirror surface of the first lens to the fifteenth lens along the optical axis direction is 11mm, 23mm, 27.5mm, 39mm, 41mm, 48mm, 54mm 54mm, 57mm, 88mm, 90mm, 86mm, 82mm, 62mm, 60mm, 49mm, 42mm, 20mm, 14mm, 8mm, 12mm, 18mm, 22mm, 24mm.
9. The near-eye display module inspection lens of claim 3, wherein: each lens is a spherical lens.
10. The near-eye display module inspection lens of claim 1, wherein: and a field diaphragm is arranged at the position of the relay imaging surface of the front lens group.
11. The near-eye display module inspection lens of claim 1, wherein: the near-to-eye display module is one of an AR optical module, a VR optical module, a HUD module and a diffraction waveguide sheet.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020024744A1 (en) * | 2000-07-14 | 2002-02-28 | Takashi Kasahara | Microscope objective lens |
| CN107765416A (en) * | 2017-10-26 | 2018-03-06 | 宁波永新光学股份有限公司 | A kind of micro objective |
| CN107957622A (en) * | 2018-01-04 | 2018-04-24 | 东莞市宇瞳光学科技股份有限公司 | A kind of focal length zoom lens of the big image planes of large aperture |
| CN113960777A (en) * | 2021-09-18 | 2022-01-21 | 茂莱（南京）仪器有限公司 | Apochromatic microobjective with large view field and long working distance |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020024744A1 (en) * | 2000-07-14 | 2002-02-28 | Takashi Kasahara | Microscope objective lens |
| CN107765416A (en) * | 2017-10-26 | 2018-03-06 | 宁波永新光学股份有限公司 | A kind of micro objective |
| CN107957622A (en) * | 2018-01-04 | 2018-04-24 | 东莞市宇瞳光学科技股份有限公司 | A kind of focal length zoom lens of the big image planes of large aperture |
| CN113960777A (en) * | 2021-09-18 | 2022-01-21 | 茂莱（南京）仪器有限公司 | Apochromatic microobjective with large view field and long working distance |
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