CN107203040B - Head-mounted display device and processing method of eyepiece optical system thereof - Google Patents
Head-mounted display device and processing method of eyepiece optical system thereof Download PDFInfo
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- CN107203040B CN107203040B CN201610156562.4A CN201610156562A CN107203040B CN 107203040 B CN107203040 B CN 107203040B CN 201610156562 A CN201610156562 A CN 201610156562A CN 107203040 B CN107203040 B CN 107203040B
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- 238000003672 processing method Methods 0.000 title abstract description 12
- 238000009966 trimming Methods 0.000 claims abstract description 120
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- 238000012545 processing Methods 0.000 claims description 13
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G02B27/017—Head mounted
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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Abstract
The invention relates to a head-mounted display device and a processing method of an eyepiece optical system thereof, comprising the eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3, the eyepiece optical system comprising one or more lenses; the broadside of at least one lens in the eyepiece optical system is the broadside after trimming treatment, and the range of the minimum value of the reserved size after trimming the broadside of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66. According to the scheme, the wide edge of the lens is trimmed, the length of the long edge of the lens is kept unchanged, so that the whole weight of the eyepiece optical system is reduced, the eyepiece optical system is easy to process and assemble, and meanwhile, the eyepiece optical system can be ensured to be more comfortable to wear under the condition that the eyepiece optical system meets the optical performances of large viewing angle, high image resolution, low distortion, small field curvature, small volume and the like.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a head-mounted display device and a processing method of an eyepiece optical system of the head-mounted display device.
Background
With the continuous development of electronic devices to ultra-miniaturization and the development of new computer, microelectronic, photoelectric devices and communication theory and technology, wearable computing has become possible in a novel mode based on "artificial basis" and "man-machine integration". The method is continuously applied in the fields of military, industry, medical treatment, education, consumption and the like. In a typical wearable computing system architecture, a head mounted display device is a critical component. The head-mounted display device guides video image light emitted by a miniature image display (such as a transmission type or reflection type liquid crystal display screen, an organic electroluminescent device and a DMD device) to the pupil of a user through an optical technology, realizes virtual and enlarged images in the near-eye range of the user, and provides visual and visible image, video and text information for the user. The eyepiece optical system is a core of the head-mounted display device, and achieves the function of displaying a miniature image in front of human eyes to form a virtual enlarged image.
The head-mounted display device is compact in size, light in weight, convenient to wear, and capable of reducing load and the like. Meanwhile, the large field angle and the visual comfort experience gradually become key factors for measuring the advantages and disadvantages of the head-mounted display device, the large field angle determines the visual experience effect of high realistic sensation, and the high image quality and the low distortion determine the comfort level of the visual experience. Meeting these requirements requires that eyepiece optics achieve as large an angle of view, high image resolution, low distortion, small curvature of field, small volume, etc. as possible, while meeting the above optical performance is a great challenge for system design and aberration optimization.
When the eyepiece optical system is processed, the eyepiece optical system is generally required to be subjected to trimming processing according to the size of the display screen, and the weight and the volume of the eyepiece optical system can be reduced as much as possible under the condition that the optical performance is met, so that the wear of the head-mounted display device product is more comfortable.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a head-mounted display device of a bandwidth edge trimming eyepiece optical system, which has good optical performance, compact volume, light weight and good processability, aiming at the defects of the prior art.
The technical scheme adopted for solving the technical problems is as follows:
constructing a head-mounted display device, which comprises an eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3, wherein the eyepiece optical system at least comprises one or more lenses; wherein, at least one broadside of the lens is a broadside after trimming, and the range of the minimum value of the reserved size of the broadside of the lens and the maximum effective optical aperture ratio of the lens is: 0.22-0.66.
The invention relates to a head-mounted display device, wherein at least one long side of a lens is a long side subjected to trimming treatment, and a front view of the lens subjected to the trimming of the long side is a rectangle with four corners in an arc shape;
When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80.
The invention relates to a head-mounted display device, wherein at least one long side of a lens is a long side subjected to trimming treatment, and a front view of the lens subjected to the trimming of the long side is a rectangle with four corners in an arc shape;
when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
The invention relates to a head-mounted display device, wherein the ratio of the length to the width corresponding to the effective display picture of a display screen is 16:16, and the range of the minimum value of the reserved size after the broadside trimming of a lens and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.66;
and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80.
The invention relates to a head-mounted display device, wherein the ratio of the length to the width corresponding to the effective display picture of a display screen is 16:12, and the ratio of the minimum value of the reserved size of a broadside cut edge of a lens to the maximum effective optical aperture of the lens is as follows: greater than 0.57;
And/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.87.
The invention relates to a head-mounted display device, wherein the ratio of the length to the width corresponding to the effective display picture of a display screen is 16:10, and the range of the minimum value of the reserved size of a broadside cut edge of a lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.51;
and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.91.
The invention relates to a head-mounted display device, wherein the ratio of the length to the width corresponding to the effective display picture of a display screen is 16:9, and the range of the minimum value of the reserved size after the broadside edge of a lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.47;
and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.93.
The invention relates to a head-mounted display device, wherein the eyepiece optical system comprises two lenses, namely: a first lens and a second lens; wherein,
The wide edge of the first lens is subjected to trimming treatment;
the wide side of the second lens is the wide side after trimming, and the long side of the second lens is the long side after trimming.
The invention relates to a head-mounted display device, wherein the ocular optical system comprises three lenses, which are respectively: a first lens, a second lens, and a third lens; wherein,
the wide sides of the first lens, the second lens and the third lens are the wide sides after trimming, and the long sides of the first lens, the second lens and the third lens are the long sides after trimming.
The invention relates to a head-mounted display device, wherein the ocular optical system comprises four lenses, which are respectively: a fourth lens, a fifth lens, a sixth lens, and a seventh lens; wherein,
the broadsides of the fourth lens, the fifth lens, the sixth lens and the seventh lens are broadsides subjected to trimming treatment.
The invention provides a head-mounted display device, wherein the head-mounted display device is a monocular head-mounted display device, and comprises:
an eyepiece optical system; and a display screen corresponding to the eyepiece optical system.
The invention provides a head-mounted display device, wherein the head-mounted display device is a binocular head-mounted display device, and comprises:
a left eye eyepiece optical system; and a left eye display screen corresponding to the left eye eyepiece optical system;
a right eye eyepiece optical system; and a right eye display screen corresponding to the right eye eyepiece optical system.
The head-mounted display device of the present invention, wherein the eyepiece optical system includes:
the first lens is close to the human eye side, the third lens is close to the image source side, and image source light rays are watched by the human eye through the third lens, the second lens and the first lens in sequence;
the combined focal power formed by the first lens and the second lens is positive, and the surface of the second lens close to the image source side is convex towards the image source direction;
the curvature directions of the two optical surfaces of the third lens are the same, and both the two optical surfaces are concave towards the image source direction.
The head-mounted display device of the present invention, wherein the eyepiece optical system includes:
the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;
The first lens group consists of two lenses, namely a fourth lens close to the human eye side and a fifth lens far from the human eye side, wherein the fourth lens is a biconvex positive lens, and the fourth lens is a negative lens; the optical surface of the fifth lens close to the human eye side is concave to the human eye side, and the curvature radius is a negative value;
the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a sixth lens adjacent to the first lens group, and a seventh lens, the sixth lens is a positive lens, and the seventh lens is positioned between the sixth lens and the display screen side.
The head-mounted display device of the present invention, wherein the eyepiece optical system includes: the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;
the first lens group is composed of two lenses, namely an eighth lens close to the human eye side and a ninth lens far from the human eye side, wherein the eighth lens is a biconvex positive lens, and the ninth lens is a negative lens; the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a tenth lens adjacent to the first lens group, and the tenth lens is a positive lens;
The second lens group further includes an eleventh lens and a twelfth lens, the tenth lens, the eleventh lens and the twelfth lens being arranged in this order from the human eye side to the micro display side;
an eleventh lens is located between the tenth lens and the display screen side.
The invention also provides a processing method of the eyepiece optical system of the head-mounted display device, which comprises the following steps:
trimming the wide edge of the lens of the head-mounted display device;
wherein, the range of the minimum value of the reserved size of the broadside cut edge of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3.
The processing method comprises the steps that the reserved size of the lens after the wide edge is cut is D, the reserved size of the lens after the long edge is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):
when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.
The processing method of the invention further comprises the steps of: trimming the long side of the lens of the head-mounted display device; wherein,
When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80;
or further comprising the steps of: trimming the long side of the lens of the head-mounted display device; wherein,
when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
The invention has the beneficial effects that: the wide edge of the lens is cut according to the set cutting method, or the long edge of the lens is cut at the same time, so that the whole weight of the eyepiece optical system is reduced, the eyepiece optical system is easy to process and assemble, and the wear of the head-mounted display device is more comfortable under the condition that the eyepiece optical system meets the optical performances of large viewing angle, high image resolution, low distortion, small curvature of field, small volume and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained by those skilled in the art without inventive effort:
FIG. 1 is a schematic view of a broadside trimming method of a head-mounted display device according to a preferred embodiment of the present invention;
FIG. 2 is a front view of the eyepiece optical system after the broadside trimming of the head mounted display device according to the preferred embodiment of the present invention;
FIG. 3 is a schematic perspective view of a plurality of lenses in a broadside trimmed eyepiece optical system of a head mounted display device according to a preferred embodiment of the invention;
FIG. 4 is a schematic view of the optical path of the eyepiece optical system before trimming the wide side of the head mounted display device according to the preferred embodiment of the present invention;
FIG. 5 is a schematic view of the optical path of the eyepiece optical system after the broadside trimming of the head mounted display device according to the preferred embodiment of the present invention;
FIG. 6 is a schematic diagram showing a first mode of trimming both the wide and long sides of a head-mounted display device according to a preferred embodiment of the present invention;
FIG. 7 is a front view of the eyepiece optical system with both the wide and long sides being trimmed for a head mounted display device according to a preferred embodiment of the invention;
FIG. 8 is a perspective view of an eyepiece optical system with both the wide and long sides being trimmed for a head mounted display device according to a preferred embodiment of the invention;
FIG. 9 is a schematic view of the optical path of the eyepiece optical system shown in FIGS. 7 and 8;
FIG. 10 is a schematic diagram showing a second mode of trimming both the wide and long sides of the head-mounted display device according to the preferred embodiment of the present invention;
FIG. 11 is a front view of an eyepiece optical system with both the wide and long sides being trimmed for a head mounted display device according to a preferred embodiment of the present invention;
FIG. 12 is a second perspective view of the eyepiece optical system with both the wide side and the long side being trimmed;
FIG. 13 is a schematic view of the optical path of the eyepiece optical system before trimming the wide side and the long side simultaneously according to the preferred embodiment of the invention;
FIG. 14 is a schematic view of the optical path of the eyepiece optical system after the broadside and long side are trimmed simultaneously according to the preferred embodiment of the invention;
fig. 15 is a schematic view showing a manner of chamfering a lens of the head-mounted display device according to the preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
The head-mounted display device of the bandwidth edge trimming eyepiece optical system comprises the eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3; the eyepiece optical system at least comprises one or more lenses; the method comprises the steps of carrying out trimming treatment on the broadside of at least one lens, wherein the broadside of at least one lens is the broadside after the trimming treatment is carried out, and the range of the minimum value of the reserved size of the broadside of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66, comprising: 0.22, 0.27, 0.32, 0.36, 0.40, 0.44, 0.47, 0.51, 0.54, 0.57, 0.59, 0.62, 0.64, 0.66. Or further, the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-2:1; the eyepiece optical system at least comprises one or more lenses; the method comprises the steps of carrying out trimming treatment on the broadside of at least one lens, wherein the broadside of at least one lens is the broadside after the trimming treatment is carried out, and the range of the minimum value of the reserved size of the broadside of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.44-0.66.
It was verified that after trimming the broad side of the lens, the range of the retained dimension minimum to the maximum effective optical aperture ratio of the lens was: the eyepiece optical system is 0.22-0.66, preferably 0.44-0.66, so that the whole weight of the eyepiece optical system is reduced, the eyepiece optical system is easy to process and assemble, and meanwhile, the eyepiece optical system can meet the optical performances of large viewing angle, high image resolution, low distortion, small curvature of field, small volume and the like, so that the head-mounted display device is more comfortable to wear.
Because the eyepiece optical system is of an axisymmetric optical structure, when the eyepiece optical system is used for observing a rectangular display region, a part of light transmission range is not effectively utilized, the long side and/or the wide side of the lens can be cut according to the effective display picture proportion of the display screen, the part of the optical structure corresponding to the light transmission range which is not effectively utilized is removed, and the optical structure of the rest part still can ensure that the optical performances such as a large field angle, high image resolution, low distortion, small field curvature, small volume and the like can be met.
Fig. 1 shows a broadside trimming mode of a head-mounted display device, in which two parallel dashed positions are cut lines, and a solid circle with a larger diameter represents the original size of a lens and a solid circle with a smaller diameter represents the maximum effective optical size of the lens. Wherein A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the allowance for lens processing and manufacturing, and D is the reserved size of the lens after the broadside is trimmed.
Fig. 2 shows a front structure of the eyepiece optical system after trimming by the trimming method of fig. 1, and fig. 3 shows a three-dimensional assembly structure of the eyepiece optical system after trimming by the trimming method of fig. 1, wherein the upper and lower edges are cut off, and the arcs on both sides are reserved, so that the eyepiece optical system is convenient to mount and fix in the head-mounted display device. FIG. 4 shows a schematic view of the optical path of the eyepiece optical system before broadside trimming, and it can be seen that the light coverage does not relate to the entire surface of the eyepiece optical system, but rather a rectangular region therein; fig. 5 shows a schematic view of the optical path of the eyepiece optical system after the broadside trimming, and it can be seen that the light passing portion of the eyepiece optical system is not affected by the lens after the cutting portion, so that the eyepiece optical system can meet the optical performances of large field angle, high image resolution, low distortion, small field curvature, small volume and the like.
In a further embodiment, in the eyepiece optical system of the head-mounted display device, a long side of at least one lens is a long side subjected to trimming, and a front view of the lens subjected to trimming is a rectangle with four corners in an arc shape; when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80; or when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
Fig. 6 shows a way of trimming both the long and wide sides of a head mounted display device, wherein the two sets of parallel dashed line positions are the long and wide side cut lines, respectively, and the solid circle with larger diameter represents the original size of the lens and the solid circle with smaller diameter represents the maximum effective optical size of the lens. Wherein A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the allowance for lens processing and manufacturing, D is the reserved size of the lens after broadside trimming, and E is the reserved size of the lens after long side trimming.
Fig. 7 and 8 show the front structure and the three-dimensional structure of an eyepiece optical system in which the wide and long sides are cut simultaneously in the manner shown in fig. 6, respectively, and it can be seen that the lens in which the wide and long sides are cut is a rectangle having circular arc four corners. Fig. 9 shows the optical path diagram of one quarter of the eyepiece optical system in fig. 7 and 8, and it can be seen that even if the long side and the wide side are trimmed, the optical path 100 is not affected, and the eyepiece optical system can still satisfy the optical performance of large field angle, high image resolution, low distortion, small field curvature, small volume, and the like.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:16, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.66; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.80.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:15, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.64; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.82.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:14, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.62; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.84.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:13, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.59; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.86.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:12, the ratio of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture of the lens is: greater than 0.57; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.87.
Preferably, in the above head-mounted display device, the range of the ratio of the length to the width corresponding to the effective display screen on the display screen is: above 16:11, the minimum value of the reserved size after the broadside trimming of the lens and the maximum effective optical aperture ratio of the lens range from: greater than 0.54; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.89.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:10, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.51; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.91.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:9, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.47; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.93.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:8, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.44; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.94.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:7, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.40; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.96.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:6, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.36; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.98.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:5, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.32; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 0.99.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:4, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.27; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 1.00.
Preferably, in the above head-mounted display device, when the ratio of the length to the width corresponding to the effective display screen of the display screen is 16:3, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.22; and/or the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens are in the following range: greater than 1.02.
Fig. 10 shows a way of trimming both the long and wide sides of a head mounted display device, wherein two sets of parallel dashed line positions are the long and wide side cut lines, respectively, and the larger diameter solid line circle represents the original size of the lens and the smaller diameter solid line circle represents the maximum effective optical size of the lens. Wherein A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the allowance for lens processing and manufacturing, D is the reserved size of the lens after broadside trimming, and E is the reserved size of the lens after long side trimming.
Fig. 11 and 12 show the front structure and the three-dimensional structure of an eyepiece optical system after the wide and long sides are cut simultaneously in the manner illustrated in fig. 10, respectively, and it can be seen that the lens 30 after the wide and long sides are cut is rectangular; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: 0.683-0.992. Fig. 13 shows an optical path diagram of the eyepiece optical system before trimming the long side and the wide side in the manner of fig. 6 and 10, and fig. 14 shows an optical path diagram of the eyepiece optical system after trimming the long side and the wide side in the manner of fig. 6 and 10, and it can be seen that the optical path 100 is not affected even if trimming the long side and the wide side is performed, and the eyepiece optical system can satisfy optical performances such as a large angle of view, a high image resolution, a low distortion, a small curvature of field, a small volume, and the like.
Preferably, in the above embodiment, the trimming process is performed in the manner illustrated in fig. 10, and when the ratio of the length to the width corresponding to the effective display screen is 16:16, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.66; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.683;
preferably, in the above embodiment, the trimming process is performed in the manner illustrated in fig. 10, and when the ratio of the length to the width corresponding to the effective display screen is 16:12, the ratio of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture of the lens is: greater than 0.57; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.778.
Preferably, in the above embodiment, the trimming process is performed in the manner illustrated in fig. 10, and when the ratio of the length to the width corresponding to the effective display screen is 16:10, the range of the minimum value of the reserved size after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.51; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.832.
Preferably, in the foregoing embodiment, trimming is performed in the manner illustrated in fig. 10, and when the ratio of the length to the width of the effective display screen is 16:9, the range of the minimum value of the reserved dimension after trimming the broad side of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.47; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.860.
In a further embodiment, the trimming process is performed in the manner illustrated in fig. 15, the long side of the lens is the long side after the trimming process, and the front view of the lens is a polygon formed by cutting four corners from a rectangle; the parts of the lens with four corners cut off in the front view are triangular; the side length of the side z1 corresponding to the wide side of the triangle and the lens is marked as F, the side length of the side z2 corresponding to the long side of the triangle and the lens is marked as G, the side length of the third side z3 of the triangle is marked as H, and the angles corresponding to z1 to z3 are marked as ∠ Alpha, the angle from the diagonal line of the effective display picture of the display screen to the long side of the effective display picture of the display screen is ∠ Beta; wherein the following relational expressions (1) and (2) are satisfied:
∠α＝ ∠ β＝atan(b/a) (1)；
F/D ≤ 0.26 (2)；
in the above relational expressions (1) and (2), a is the length corresponding to the effective display picture of the display screen, b is the width corresponding to the effective display picture of the display screen, and D is the reserved size of the lens after the broadside edge is cut.
In the embodiments provided by the present invention, the head-mounted display device may be a monocular head-mounted display device, including: an eyepiece optical system; and a display screen corresponding to the eyepiece optical system. Alternatively, the head-mounted display device is a binocular head-mounted display device, including: a left eye eyepiece optical system; and a left eye display screen corresponding to the left eye eyepiece optical system; a right eye eyepiece optical system; and a right eye display screen corresponding to the right eye eyepiece optical system.
In one specific embodiment, as shown in fig. 7, 8 and 9, the eyepiece optical system of the head mounted display device includes two lenses 20: a first lens 21 and a second lens 22. The wide side of the first lens 21 is a wide side subjected to trimming treatment; the wide side of the second lens 22 is a wide side subjected to trimming processing, and the long sides of the first lens 21 and the second lens 22 are long sides subjected to trimming processing. The range of the minimum value of the reserved size after the broad side trimming of the first lens 21 and the second lens 22 and the maximum effective optical aperture ratio of the lenses is as follows: 0.22-0.66. When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80. When the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size after the long edge of the lens is trimmed to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
In another specific embodiment, as shown in fig. 13 and 14, the eyepiece optical system of the head mounted display device includes three lenses: the first lens 21, the second lens 22 and the third lens 23 are coaxially and sequentially arranged along the optical axis direction, wherein the first lens 21 is close to the human eye side, the third lens 23 is close to the image source side, and image source light rays are sequentially observed by the human eye through the third lens 23, the second lens 22 and the first lens 21; the surface of the second lens 22 close to the image source side is convex towards the image source direction; the curvature directions of the two optical surfaces of the third lens 23 are the same, and both the surfaces are concave towards the image source direction.
Preferably, the broad sides of the first lens 21, the second lens 22 and the third lens 23 are broad sides after trimming, and the range of the minimum value of the reserved size after trimming the broad sides and the maximum effective optical aperture ratio of the lenses is: 0.22-0.66, more preferably: 0.44-0.66; meanwhile, the long sides of the first lens 21, the second lens 22 and the third lens 23 are long sides after trimming; and the minimum value of the reserved size after the long edges of the second lens 22 and the third lens 23 are trimmed and the maximum effective optical aperture ratio value range of the second lens 22 and the third lens 23 are as follows: greater than 0.8, the range of the minimum value of the reserved size after trimming the long side of the first lens 21 and the maximum effective optical aperture ratio of the second lens 22 and the third lens 23 is as follows: 0.683-0.992.
In another specific embodiment, as shown in fig. 2, 3, 4 and 5, the eyepiece optical system of the head mounted display device includes four lenses 10: the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value; the first lens group is composed of two lenses, namely a fourth lens 11 close to the human eye side and a fifth lens 12 far from the human eye side, wherein the fourth lens 11 is a biconvex positive lens, and the fourth lens 11 is a negative lens; the optical surface of the fifth lens 12 near the human eye side is concave towards the human eye side, and the curvature radius is negative; the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a sixth lens 13 adjacent to the first lens group, and a seventh lens 14, the sixth lens 13 is a positive lens, and the seventh lens 14 is located between the sixth lens 13 and the display screen side.
Preferably, the wide sides of the fourth lens 11, the fifth lens 12, the sixth lens 13 and the seventh lens 14 are all the wide sides after trimming; and the range of the minimum value of the reserved size after the broadside trimming of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66.
In another specific embodiment, the eyepiece optical system of the head mounted display device includes five lenses (not shown): the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value; the first lens group is composed of two lenses, namely an eighth lens close to the human eye side and a ninth lens far from the human eye side, wherein the eighth lens is a biconvex positive lens, and the ninth lens is a negative lens; the optical surface of the ninth lens close to the human eye side is concave to the human eye side, and the curvature radius is a negative value; the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a tenth lens adjacent to the first lens group, and the tenth lens is a positive lens; the second lens group further includes an eleventh lens and a twelfth lens, the tenth lens, the eleventh lens and the twelfth lens being arranged in this order from the human eye side to the micro display side; an eleventh lens is located between the tenth lens and the display screen side. Wherein the eighth lens, the ninth lens, the tenth lens, the eleventh lens and the twelfth lens are broadside trimmed in the manner described in the foregoing embodiments, or broadside and long side trimmed at the same time.
In another embodiment of the present invention, there is also provided a method for processing an eyepiece optical system of a head-mounted display device according to the present invention, referring to fig. 1, including the steps of: trimming the wide edge of the lens of the head-mounted display device; the range of the minimum value of the reserved size after the broadside edge cutting of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3. It was verified that after trimming the broad side of the lens, the range of the retained dimension minimum to the maximum effective optical aperture ratio of the lens was: 0.22-0.66, not only can the whole weight of the ocular optical system be lightened, the ocular optical system is easy to process and assemble, but also the ocular optical system can be ensured to meet the optical performances of large field angle, high image resolution, low distortion, small field curvature, small volume and the like, so that the wearing of the head-mounted display device is more comfortable.
In the processing method, the reserved size of the lens after the wide edge is cut is D, the reserved size of the lens after the long edge is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):
when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.
Referring to fig. 6, when the value of E/B is less than or equal to 0.92, the above processing method further includes the steps of: trimming the long side of the lens of the head-mounted display device; when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80.
Referring to fig. 6, when the value of E/B is less than or equal to 0.92, the above processing method further includes the steps of: trimming the long side of the lens of the head-mounted display device; when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
Referring to fig. 10, the above processing method further includes the steps of: trimming the long side of the lens of the head-mounted display device; wherein the front view of the lens is rectangular; the range of the minimum value of the reserved size after the long edge of the lens is cut and the maximum effective optical aperture ratio of the lens is as follows: 0.683-0.992.
Referring to fig. 15, the above processing method further includes the steps of: the lens is subjected to corner cutting treatment, and the front view of the lens is a polygon formed by cutting four corners of a rectangle; the parts of the lens with four corners cut off in the front view are triangular; the side length of the side z1 of the triangle corresponding to the wide side of the lens is denoted as F, the side of the triangle corresponding to the long side of the lens is denoted as z2, the third side of the triangle is denoted as z3, and the angles corresponding to z1 to z3 are ∠ Alpha, the angle from the diagonal line of the effective display picture of the display screen to the long side of the effective display picture of the display screen is ∠ β；
Wherein the following relational expressions (1) and (2) are satisfied:
∠α＝ ∠ β＝atan(b/a)(1)；
F/D≤0.26(2)；
in the above relational expressions (1) and (2), a is the length corresponding to the effective display picture of the display screen, b is the width corresponding to the effective display picture of the display screen, and D is the reserved size of the lens after the broadside edge is cut.
In summary, the invention makes the whole eyepiece optical system lighter in weight and easy to process and assemble by trimming the broad side of the lens or trimming the long side thereof according to the set cutting method, and simultaneously ensures that the eyepiece optical system is more comfortable to wear under the condition of meeting the optical performances of large field angle, high image resolution, low distortion, small curvature of field, small volume and the like.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (16)
1. A head-mounted display device comprises an eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3, wherein the eyepiece optical system at least comprises one or more lenses; the method is characterized in that at least one broadside of the lens is the broadside after trimming, and the range of the minimum value of the reserved size of the broadside of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66;
The reserved size of the lens after the broadside is cut is D, the reserved size of the lens after the long side is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):
when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.
2. The head-mounted display device according to claim 1, wherein the long side of at least one of the lenses is a long side subjected to trimming, and the front view of the lens subjected to trimming is a rectangle having four corners in a circular arc shape;
when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80.
3. The head-mounted display device according to claim 1, wherein the long side of at least one of the lenses is a long side subjected to trimming, and the front view of the lens subjected to trimming is a rectangle having four corners in a circular arc shape;
when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
4. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:12, and the ratio of the minimum value of the reserved size after the broadside trimming of the lens to the maximum effective optical aperture of the lens is: greater than 0.57;
and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.87.
5. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:10, and the range of the minimum value of the reserved size after the broadside trimming of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.51;
and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.91.
6. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:9, and the range of the minimum value of the reserved size after the broadside trimming of the lens and the maximum effective optical aperture ratio of the lens is: greater than 0.47;
And/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.93.
7. A head mounted display device according to claim 1, 2 or 3, wherein the eyepiece optical system comprises two lenses, one for each: a first lens and a second lens; wherein,
the wide edge of the first lens is subjected to trimming treatment;
the wide side of the second lens is the wide side after trimming treatment, or the long side of the second lens is the long side after trimming treatment.
8. A head mounted display device according to claim 1, 2 or 3, wherein the eyepiece optical system comprises three lenses, respectively: a first lens, a second lens, and a third lens; wherein,
the wide sides of the first lens, the second lens and the third lens are the wide sides after trimming treatment, or the long sides of the first lens, the second lens and the third lens are the long sides after trimming treatment.
9. The head mounted display device of claim 1, wherein the eyepiece optical system comprises four lenses, one for each: a fourth lens, a fifth lens, a sixth lens, and a seventh lens; wherein,
The broadsides of the fourth lens, the fifth lens, the sixth lens and the seventh lens are broadsides subjected to trimming treatment.
10. The head mounted display device of claim 1, 2 or 3, wherein the head mounted display device is a monocular head mounted display device comprising:
an eyepiece optical system; and a display screen corresponding to the eyepiece optical system.
11. A head mounted display device according to claim 1, 2 or 3, wherein the head mounted display device is a binocular head mounted display device comprising:
a left eye eyepiece optical system; and a left eye display screen corresponding to the left eye eyepiece optical system;
a right eye eyepiece optical system; and a right eye display screen corresponding to the right eye eyepiece optical system.
12. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises:
the first lens is close to the human eye side, the third lens is close to the image source side, and image source light rays are watched by the human eye through the third lens, the second lens and the first lens in sequence;
The combined focal power of the first lens and the second lens is a positive value, and the surface of the second lens close to the image source side is convex towards the image source direction;
the curvature directions of the two optical surfaces of the third lens are the same, and both the two optical surfaces are concave towards the image source direction.
13. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises:
the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;
the first lens group consists of two lenses, namely a fourth lens close to the human eye side and a fifth lens far from the human eye side, wherein the fourth lens is a biconvex positive lens, and the fourth lens is a negative lens; the optical surface of the fifth lens close to the human eye side is concave to the human eye side, and the curvature radius is a negative value;
the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a sixth lens adjacent to the first lens group, and a seventh lens, the sixth lens is a positive lens, and the seventh lens is positioned between the sixth lens and the display screen side.
14. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises: the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;
the first lens group is composed of two lenses, namely an eighth lens close to the human eye side and a ninth lens far from the human eye side, wherein the eighth lens is a biconvex positive lens, and the ninth lens is a negative lens;
the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a tenth lens adjacent to the first lens group, and the tenth lens is a positive lens;
the second lens group further includes an eleventh lens and a twelfth lens, the tenth lens, the eleventh lens and the twelfth lens being arranged in this order from the human eye side to the micro display side;
an eleventh lens is located between the tenth lens and the display screen side.
15. A method of processing an eyepiece optical system of a head mounted display device as recited in claim 1 comprising the steps of:
Trimming the wide edge of the lens of the head-mounted display device;
wherein, the range of the minimum value of the reserved size of the broadside cut edge of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3;
the reserved size of the lens after the broadside is cut is D, the reserved size of the lens after the long side is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):
when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.
16. The method of processing according to claim 15, further comprising the step of: trimming the long side of the lens of the head-mounted display device; wherein,
when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80;
or further comprising the steps of: trimming the long side of the lens of the head-mounted display device; wherein,
When the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.
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| CN201610156562.4A CN107203040B (en) | 2016-03-18 | 2016-03-18 | Head-mounted display device and processing method of eyepiece optical system thereof |
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| TW201740721A (en) * | 2016-02-03 | 2017-11-16 | 台灣東電化股份有限公司 | Camera device |
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| JP4321078B2 (en) * | 2003-02-28 | 2009-08-26 | コニカミノルタホールディングス株式会社 | Molded lens |
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| CN1837942A (en) * | 2005-03-23 | 2006-09-27 | 三菱电机株式会社 | Image pick-up device |
| JP2010256779A (en) * | 2009-04-28 | 2010-11-11 | Panasonic Corp | Optical element |
| CN102162865A (en) * | 2010-02-23 | 2011-08-24 | 三星电机株式会社 | Plastic lens, lens module, and lens injection mold |
| TW201511554A (en) * | 2013-07-17 | 2015-03-16 | Heptagon Micro Optics Pte Ltd | Camera module including a non-circular lens |
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