CN110515208A - Short-range optical system - Google Patents
Short-range optical system Download PDFInfo
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- CN110515208A CN110515208A CN201910780706.7A CN201910780706A CN110515208A CN 110515208 A CN110515208 A CN 110515208A CN 201910780706 A CN201910780706 A CN 201910780706A CN 110515208 A CN110515208 A CN 110515208A
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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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- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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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
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
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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
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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- Optics & Photonics (AREA)
Abstract
The present invention provides a kind of short-range optical system, it sequentially includes a display screen, optical module and at least two lens groups comprising a reflective polarizer, first phase delay piece, a part of penetrating component reflecting element and an at least optical element, this at least two lens group is individually positioned in the either side for waiting elements in optical module.Display screen image output and after emitting beam, penetrate light portion through reflective polarizer, part is reflected, the light penetrated is after first phase delay piece carries out first time phase delay, pass through the reflecting element partial penetration of partial penetration part, part is then reflected back first phase delay piece and reflective polarizer carries out second and third time phase delay, then, light by third time phase delay carries out the 4th phase delay by optical element, then imports image in an at least human eye via lens group.
Description
Technical field
For the present invention in relation to a kind of optical system, particularly relating to one kind can be applied to short-range optical system of head-mounted display
System.
Background technique
Head-mounted display (Head-mounted display) is the equipment for showing image and color, usually uses eye
The form of cover or the helmet adjusts focal length by optical path by display screen close to the eyes of user to throw in short distance eyes
Picture is penetrated, the effect of virtual reality is generated, increases the telepresenc of wearer.
Fig. 1 show the schematic diagram of optical system of the head-mounted display of virtual reality, and display screen 10 projects image, passes through
It is incident to lens group 22 after the optical path that one section of light path is d, this lens group 22 is the combination of single lens or multiple lens, to incite somebody to action
Image is directed into the human eye 24 of user, it is assumed that light path d is 40mm, and the length of head-mounted display is that light path d adds lens
The thickness of group, suitable eye distance, shell etc., summation shows slightly heavy for the eyeshade and the helmet that are worn on the head, to user's
The bridge of the nose, the crown, neck can all cause burden not wear long, so technology is dedicated to optical system in head-mounted display at present
Length shortens, so that the thickness of head-mounted display reduces, wears and uses convenient for user.
Therefore, the present invention proposes a kind of short-range optical system, other than can be by the Distance Shortened of optical system,
Visual field can more be expanded, effectively solve it is above-mentioned this problems such as, specific framework and embodiments thereof are detailed later.
Summary of the invention
The main purpose of the present invention is providing a kind of short-range optical system, is arranged between display screen and lens group
The optical elements such as reflective polarizer, phase delay chip, partial penetration part reflecting element utilize the phase delay of light and more
Secondary reflection reaches approximate or equal length light path, uses and shortens the distance between display screen and lens group, finally can be used to by
Head-mounted display micromation.
Another object of the present invention is providing a kind of short-range optical system, and all optical elements are located at coaxially
On, the polarization situation according to display screen is adjusted, to increase under the premise of shortening the distance between display screen and lens group
The variability and flexibility of optical system configurations.
A further object of the present invention is providing a kind of short-range optical system, can be applied to head-mounted display, game
Wide-angle lens or wide-angle eyepiece on the products such as machine carry out focus adjustment using two lens groups, and short distance, visual field are big, can reach
Good aberration correction.
In order to achieve the above object, the present invention provides a kind of short-range optical system, comprising: a display screen, image output is simultaneously
It emits beam；One optical module a, comprising: reflective polarizer, corresponding display screen setting make orthogonal polarized light in the light
It penetrates, the reflection of horizontal polarization light；One first phase postpones piece, and corresponding reflective polarizer setting, it is reflective that reception penetrates this
The light of polarizing film, and carry out first time phase delay；A part of penetrating component reflecting element, the corresponding first phase are prolonged
Slow piece setting, makes the light portion through first time phase delay penetrate the partial penetration part reflecting element, and part is then anti-
It is emitted back towards first phase delay piece and carries out second and third time phase delay；An at least optical element, the corresponding partial penetration
The setting of part reflecting element, receiving portion penetrate the partial penetration part reflecting element and prolong by second, third secondary phase
The slow light, and carry out the 4th phase delay；And at least two lens groups, it is respectively arranged in the optical module extremely
The either side of few two persons, to focus and import image in an at least human eye.
Embodiment according to the present invention, the optical element include: second phase delay piece, the corresponding partial penetration part
Reflecting element setting, receiving portion penetrate the partial penetration part reflecting element and by second, third secondary phase delays
The polarised light, and carry out the 4th phase delay；And a linear polarizer, corresponding second phase delay piece setting, linear polarization
Piece to allow only by the polarised light of phase delay twice should not by and only allow and pass through by the polarised light of four phase delays.
Another embodiment according to the present invention, the optical element are a circular polarizing disk.
Embodiment according to the present invention, the partial penetration part reflecting element are reflected back the light of first phase delay piece
Line postpones piece by the first phase and reaches the reflection type polarization after second of phase delay of first phase delay piece
Piece, and complete to be totally reflected in the reflection type polarization on piece, the light is allowed to be reflected back first phase delay piece again and carry out third
Secondary phase delay, then light passes through first phase delay piece and the partial penetration part reflecting element reaches the second phase
Postpone piece.
Embodiment according to the present invention, first, second, third, fourth phase delay all increase the odd number of 1/4 wavelength
Phase delay again, makes the integral multiple of coextensive slow 1 wavelength of the light for reaching the lens group.
Embodiment according to the present invention, the light which sent out and entered the reflective polarizer is linear polarization
Light.It to be left light or right-hand circularly polarized light that the linearly polarized light is converted after the first phase postpones piece.
Embodiment according to the present invention further includes a linear polarizer between second phase delay piece and the human eye, to
Allow only by the light of phase delay twice should not by and only allow and pass through by the light of four phase delays.
Embodiment according to the present invention, the human eye and to an at least plate glass, the lens can be placed between the lens group
Group is to can also place an at least plate glass between the display screen, and in being arranged in the corresponding optical module on the plate glass
At least one, material can be thin-film material or that be optical coating etc. in the form of coating, plated film or bonding etc. be placed in this is flat
On glass sheet.
Detailed description of the invention
Fig. 1 is the schematic diagram of light path between the display screen and human eye of head-mounted display in the prior art.
Fig. 2 is the schematic diagram of one of the short-range optical system of present invention embodiment.
Fig. 3 A to Fig. 3 C is the flow chart of steps of the short-range optical system of the present invention.
Fig. 4 A to Fig. 4 E is the schematic diagram of the difference configuration of two lens groups in the short-range optical system of the present invention.
Reference signs list: 10- display screen；12- reflective polarizer；14- first phase postpones piece；16- partial penetration
Part reflecting element；18- second phase postpones piece；20- linear polarizer；22- lens group；24- human eye；26- plate glass；30-
First lens group；The second lens group of 32-.
Specific embodiment
The present invention provides a kind of short-range optical system, is applied to head-mounted display, especially head-mounted display
Virtual reality system, be difficult to be fixed on the head of user if too big if volume, too long due to being on the head for be worn over user and
Tenesmus can be affected by gravity, but will head to user and neck cause to bear, therefore the size of head-mounted display is smaller more
Good, especially length must shorten, and the purpose of the present invention is that light is carried out multiple reflections using multi-disc lens, in phase
With overall optical system is shortened under the light path of length, to reach the purpose of head-mounted display micromation.
Referring to FIG. 2, it is the schematic diagram of one of the short-range optical system of present invention embodiment, it is included in a display screen
10 and at least between human eye 24 sequentially include a reflective polarizer 12, a first phase postpone piece 14, a part of penetrating component
Reflecting element 16, second phase delay piece 18, a linear polarizer 20 and two lens groups 22, wherein 10 image output of display screen
And emit beam, this light is polarised light or non-polarized light, and in this embodiment, polarised light is linearly polarized light, furthermore,
The polarization direction of linearly polarized light in this embodiment is vertical with optical path；The corresponding display screen 10 of reflective polarizer 12 is arranged, and receives
The polarised light that display screen 10 is issued, and the polarised light partial penetration, part are reflected, the reflection especially of the invention used
Formula polarizing film 12 include with the vertical and parallel two kinds of polarization directions of optical path, be vertically penetrating shaft, level be axis of reflection；First phase
Postpone the corresponding reflective polarizer 12 of piece 14 to be arranged, to receive the polarised light from 12 partial penetration of reflective polarizer, go forward side by side
Row first time phase delay；The corresponding first phase delay piece 14 of partial penetration part reflecting element 16 is arranged, and receives by the
The light of one phase delay chip 14 simultaneously reflects the light portion passed through, partial penetration；Second phase postpones 18 corresponding part of piece
Penetrating component reflecting element 16 is arranged, the light of receiving portion penetrating component reflecting element 16, and carries out phase delay；Linear polarization
The corresponding second phase delay piece 18 of piece 20 is arranged, and linear polarizer 20 is the polarised light only by phase delay twice not led to
It crosses and only allows and pass through by the polarised light of four phase delays, imported image in human eye 24 by lens group 22.
Specifically, the fast and slow axis of first phase delay piece 14 and reflective polarizer 12 penetrate axle clamp 45 in the present invention
Angle is spent, the phase delay of 1/4 wavelength can be increased.
In addition, in the present invention at least two lens groups, be not set to appointing at least two elements in the optical module
Side, by taking the embodiment of Fig. 2 as an example, two lens groups 22 are respectively provided at the two sides of first phase delay piece 14.Each lens group is all
It can be single element lens or multi-disc lens, and lens can be saturating for non-spherical lens, Fresnel Lenses (Fresnel lens) or multi-disc
The combination of mirror.
Specific steps flow chart please refers to Fig. 3 A to Fig. 3 C in the present invention, first in Fig. 3 A, 10 image output of display screen,
And polarised light is issued to reflective polarizer 12, reflective polarizer 12 makes the polarised light partial penetration to first phase postpone piece
14, part is then reflected back display screen 10, and the polarised light of the partial penetration of penetrating reflective polarizing film 12 prolongs by first phase
After slow piece 14, first time phase delay will do it, then reach partial penetration part reflecting element 16；Next referring to Fig. 3 B,
Polarised light partial penetration at partial penetration part reflecting element 16 by first time phase delay, part are then reflected back first
Phase delay chip 14 carries out second of phase delay, and the polarised light of partial penetration part reflecting element 16 herein is energy damage
It loses, and reaches reflective polarizer 12 after the polarised light of first time phase delay penetrates first phase delay piece 14；Then
It refer again to Fig. 3 C, reflective polarizer 12 reflects the polarised light Jing Guo second of phase delay, is reflected back the first phase
Position delay piece 14, carries out third time phase delay, using partial penetration part reflecting element 16, the polarised light of partial penetration
(passing through third time phase delay) reaches second phase and postpones piece 18, and carries out the 4th phase delay；Then, through the 4th phase
The polarised light of position delay penetrates second phase delay piece 18, is screened, is only allowed by four phase delays in linear polarizer 20
Polarised light imported in an at least human eye 24 by linear polarizer 20, and by lens group 22.
Since first phase delay piece 14 in the present invention and second phase delay piece 18 are all the odd-multiple phase of 1/4 wavelength
Delay, thus after four phase delay coextensive slow 1 wavelength integral multiple.
Linearly polarized light can be transformed into circularly polarized light after postponing piece 14 by first phase, including left light or right circle it is inclined
Two kinds of light of vibration.But after part circularly polarized light is reflected back first phase delay piece 14 by partial penetration part reflecting element 16, again
It can become linearly polarized light, although also piece 14 can be postponed by first phase again later and be converted into circularly polarized light, by the
After two phase postpones piece 18, it can still be converted into loop line polarised light.
It is the embodiment of a variety of different configuration methods of two lens groups in Fig. 4 A to Fig. 4 E, this two lens group is respectively first
Lens group 30 and the second lens group 32, but this embodiment is not to limit the configuration method of lens group in the present invention, as long as anti-
Penetrate formula polarizing film 12, first phase delay piece 14, partial penetration part reflecting element 16, second phase delay piece 18 and linear polarization
The range that the lens group of lens group, total at least two groups to focus just is included in this case is arranged in the either side of at least one of piece 20
In.
It further illustrates, reflective polarizer 12, first phase delay piece 14, partial penetration part reflecting element 16, the
Two phase delay piece 18 and linear polarizer 20 wait the material of optical elements that can be thin-film material or be optical coating etc., to be coated with,
The form of plated film or bonding etc. is placed on an at least plate glass or lens, and for example, reflective polarizer 12 and part are worn
Saturating part reflecting element 16 can be the plated film on lens, or tool reflection type polarization function itself eyeglass or be form of film
Optical material be attached on lens, therefore, the present invention can by reflective polarizer 12 and first phase delay piece 14 can be integrated,
Partial penetration part reflecting element 16 and second phase delay piece 18 can be integrated, for example, as shown in Figure 4 A, reflective inclined
Vibration piece 12 and first phase delay piece 14 are same lens group 32 (the second lens group 32 is single element lens in this embodiment), such as
Reflection type polarization film is set close to 10 side of display screen in first phase delay piece 14 or reaches same eyeglass using special material
Have the function of phase delay and reflection type polarization, and in the left side of the first lens group 30, then sequentially it is equipped with partial penetration part
Reflecting element 16 (being partial penetration part reflectance coating in this embodiment), second phase postpone piece 18, linear polarizer 20 and plate
Glass 26.In other words, in the embodiment of Fig. 4 A, the first lens group 30 is located at first phase delay piece 14 and partial penetration part
Between reflecting element 16, the second lens group is then located between reflective polarizer 12 and first phase delay piece 14.This embodiment
Specific data such as following table one:
Table one
A, B, C, D, E in upper table etc. are the parameter in aspherical formula, and aspherical formula is
Wherein C=1/R, R are radius of curvature.In addition, f is the effective focal length of optical system in table, ω is half view of optical system
Rink corner, H are the visual range radius of display screen, and f1 and f2 are respectively the effective focal length of the first, second lens group, and Nd is refractive index
(Refractive index), Vd are Abbe number (Abbe number) or abbe number (V-number).
Fig. 4 B show another embodiment, and reflective polarizer 12 is set on the display screen 10, and first phase delay piece 14 is set
In the left side of reflective polarizer 12, partial penetration part reflecting element 16 also can be made in second by plated film or material selection
In lens group 32, second phase postpones piece 18 and linear polarizer 20 then respectively on the right side of the first lens group 30.This embodiment it
Specific data such as following table two:
Table two
Fig. 4 C, Fig. 4 D and Fig. 4 E are the configuration mode of other three kind of first lens group 30 and the second lens group 32, due to the
One lens group 30 and the second lens group 32 can be the combination of single element lens or multi-disc lens, and can be concavees lens, convex lens etc., recessed
Convex direction can also change, therefore can generate a variety of different combinations.
In the embodiment of Fig. 4 C, the second lens group 32 is set to first phase delay piece 14 and partial penetration part reflecting element
Between 16, the partial penetration part reflecting element 16 of this embodiment is the plated film set on 32 left side of the second lens group, and reflective
Polarizing film 12 is located at the right side on 32 right side of the second lens group, first phase delay piece；First lens group 30 is then located at partial penetration
Between part reflecting element 16 and second phase delay piece 18, the specific data such as following table three of this embodiment:
Table three
In the embodiment of Fig. 4 D, the first lens group 30 and the second lens group 32 are all set to first phase delay piece 14 and part
Between penetrating component reflecting element 16, wherein reflective polarizer 12 and first phase delay piece 14 are all set to the second lens group 32
Right side, reflective polarizer 12 is located at the right side of first phase delay piece 14, and partial penetration part reflecting element 16, second
Phase delay chip 18, linear polarizer 20 and plate glass 26 are all set to the left side of the first lens group 30, part of penetrating component
Reflecting element 16 is the plated film being located in the first lens group 30.The specific data such as following table four of this embodiment:
Table four
In the embodiment of Fig. 4 E, it more can be seen that reflective polarizer 12 is set to display screen by this configuration from the position of total reflection
10 left side, the first lens group 30 and the second lens group 32 are all set to first phase delay piece 14 and the reflector of partial penetration part
It is sequentially partial penetration part reflecting element 16, second phase delay piece 18, line in the left side of the first lens group 30 between part 16
Polarizing film 20 and plate glass 26.The specific data such as following table five of this embodiment:
Table five
It further illustrates, second phase can be postponed piece 18 by the present invention can be integrated with linear polarizer 20, for example, such as
Shown in Fig. 4 D, phase delay chip 18 and linear polarizer 20 can be equivalent to the function of circular polarizing disk in the same side of same lens 30.
The present invention can reach the effect of large viewing, system Distance Shortened and good aberration correction, please refer to Fig. 4 A, wherein
First lens group 30 is L1, and effective focal length f1, the second lens group 32 is L2, and effective focal length f2, F are optical system
Effective focal length, ω are the angle of half field-of view of optical system, and H is the visual range radius of display screen, and R1~R4 is position as shown in the figure
Radius of curvature, E be eyes (aperture) arrive nearest optical element surface center distance, TTL be optical system overall length, can obtain
To following formula:
Above-mentioned formula (1), (4), (5) can reach good aberration correction, and formula (2), (3), (6) then can reach it is larger
Visual angle, system Distance Shortened (lightening) advantage.
The present invention optical path is done in optical system using polarization theory internal catadioptric reach by display screen to human eye it
Between Distance Shortened effect, by taking Fig. 4 A to Fig. 4 E as an example, to the light before human eye 24 after polarised light is issued from display screen 10 in figure
The optical path for learning element passes through multiple reflection, it is assumed that in the embodiment of Fig. 4 A to Fig. 4 E, light is from display screen 10 to human eye
Light path after the length aggregation of each secondary reflection of optical element before 24 is d, and the display screen in the prior art 10 with Fig. 1 is to thoroughly
The light path d of microscope group 22 is almost identical, but since in Fig. 4 A to Fig. 4 E embodiment, the optical path of display screen 10 to human eye is through excessive
Obtained from secondary reflection aggregation, thus actually from display screen 10 to the length of human eye can much smaller than in Fig. 1 from display screen 10 to
The length of human eye 24 achievees the purpose that the length for shortening optical system.
In conclusion short-range optical system provided by the present invention after display screen, sequentially put before human eye and include
One of multiple optical elements optical module is reached the purpose of the length shortening of optical system using light multiple reflections, and utilized
Phase delay chip carries out four phase delays, emits when the polarization state of polarised light being made finally to reach human eye at the beginning from display screen
One wavelength of polarization state phase delay integral multiple.The present invention more reaches good aberration correction using the design of doublet
Effect, be suitable for wide-angle lens or wide-angle eyepiece, visual angle up to 50 degree or more, and due to the length of optical system shortening, therefore
The product (such as head-mounted display) of applied optics system can reach frivolous, micromation purpose.
Only as described above, is only a preferred embodiment of the present invention, and is not used to limit the range of implementation of the invention.
Therefore it is i.e. all according to feature described in the claims in the present invention and spiritual equivalent change or modification for it, it should be included in the present invention's
In Patent right requirement.
Claims (16)
1. a kind of short-range optical system characterized by comprising
One display screen, image output simultaneously emit beam；
One optical module, comprising:
One reflective polarizer, corresponding display screen setting penetrates the light portion, part is reflected；
One first phase postpones piece, corresponding reflective polarizer setting, and receiving portion penetrates the described of the reflective polarizer
Light, and carry out first time phase delay；
A part of penetrating component reflecting element, corresponding first phase delay piece setting, makes the institute through the first time phase delay
State light portion and penetrate the partial penetration part reflecting element, part be then reflected back first phase delay piece carry out second and
Third time phase delay；
An at least optical element, corresponding partial penetration part reflecting element setting, receiving portion penetrate the partial penetration part
Reflecting element and the light Jing Guo second, third secondary phase delay, and the 4th phase delay is carried out, and allow and only pass through
The light of phase delay not passed through by only allowing by the light of four phase delays twice；And
At least two lens groups are respectively arranged at the either side of at least one of the optical module, to focus and by image
It imports in an at least human eye.
2. short-range optical system according to claim 1, which is characterized in that the human eye and to can between the lens group
An at least plate glass is placed, the lens group is to can also place an at least plate glass between the display screen, and in the plate glass
At least one of corresponding optical module is set on glass, material can be thin-film material or be optical coating etc. to be coated with,
The form of plated film or bonding etc. is placed on the plate glass.
3. short-range optical system according to claim 1, which is characterized in that the optical element includes:
One second phase postpones piece, corresponding partial penetration part reflecting element setting, and receiving portion penetrates the partial penetration portion
Divide reflecting element and the polarised light Jing Guo second, third secondary phase delay, and carries out the 4th phase delay；And
One linear polarizer, corresponding second phase delay piece setting, linear polarizer is to allow only by the polarization of phase delay twice
Light should not by and only allow and pass through by the polarised light of four phase delays.
4. short-range optical system according to claim 1, which is characterized in that the optical element is a circular polarizing disk.
5. short-range optical system according to claim 3, which is characterized in that the partial penetration part reflecting element institute
Be reflected back the first phase delay piece light by the first phase delay piece second of phase delay after, by this first
Phase delay chip reaches the reflective polarizer, and completes to reflect in the reflection type polarization on piece, and the light is allowed to be reflected back this again
First phase delay piece simultaneously carries out third time phase delay, and then light passes through first phase delay piece and the partial penetration portion
Reflecting element is divided to reach second phase delay piece.
6. short-range optical system according to claim 1, which is characterized in that this is first, second, third, fourth time
Phase delay all increases the phase delay of the odd-multiple of 1/4 wavelength, makes the whole of the coextensive slow wavelength of the light for reaching the human eye
Several times.
7. short-range optical system according to claim 1, which is characterized in that the display screen is sent out and enters the reflection
The light of formula polarizing film can be linearly polarized light, circularly polarized light or other polarization states, and the display screen and the reflection type polarization
Visual display screen polarization situation increases linear polarizer, circular polarizing disk or phase delay chip newly to adjust the inclined of the display screen between piece
Polarization state, number is not limited to one and material can be thin-film material or be optical coating etc. with coating, plated film or bonding etc.
Form is placed on the display screen or the reflective polarizer.
8. short-range optical system according to claim 7, which is characterized in that the linearly polarized light passes through the first phase
Left light or right-hand circularly polarized light are converted into after delay piece.
9. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one the
One lens group and one second lens group, the effective focal length of first lens group are f1, and the effective focal length of second lens group is f2,
The effective focal length of the optical system is F,
10. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one
First lens group and one second lens group, the visual range radius of the display screen are H, and the overall length of the optical system is TTL,
11. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one
First lens group and one second lens group, the visual range radius of the display screen are H, and the overall length of the optical system is TTL, the eye
The distance of eyeball centre of surface of nearest person into the optical module is E,
12. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one
First lens group and one second lens group, the effective focal length of the optical system are F, the curvature of the partial penetration part reflecting element
Radius is R1, and the radius of curvature which postpones piece is R2,
13. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one
First lens group and one second lens group, the effective focal length of the optical system are F, and the radius of curvature of first phase delay piece is
R3, the radius of curvature of the reflective polarizer are R4,
14. short-range optical system according to claim 1, which is characterized in that at least two lens group includes one
First lens group and one second lens group, the effective focal length of the optical system are F, and the angle of half field-of view of optical system is ω, the light
The overall length of system is TTL,
15. short-range optical system according to claim 1, which is characterized in that the lens group include single element lens or
Multi-disc lens.
16. short-range optical system according to claim 1, which is characterized in that the lens group can for non-spherical lens,
The combination of Fresnel Lenses or multi-disc lens.
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| CN201910780706.7A CN110515208A (en) | 2019-08-22 | 2019-08-22 | Short-range optical system |
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| CN201910780706.7A CN110515208A (en) | 2019-08-22 | 2019-08-22 | Short-range optical system |
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| CN111443491A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Optical display system, control method and display device |
| CN111766705A (en) * | 2020-06-19 | 2020-10-13 | 江西微瑞光学有限公司 | Short-distance and high-lens-birefringence-tolerance optical imaging module |
| CN111766706A (en) * | 2020-06-19 | 2020-10-13 | 江西微瑞光学有限公司 | Short-distance and high-lens-birefringence-tolerance optical imaging module |
| CN112505920A (en) * | 2019-09-16 | 2021-03-16 | 双莹科技股份有限公司 | Miniaturized short-distance optical system |
| CN112666708A (en) * | 2020-12-24 | 2021-04-16 | 业成科技（成都）有限公司 | Composite optical device and manufacturing method thereof |
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| CN112505920A (en) * | 2019-09-16 | 2021-03-16 | 双莹科技股份有限公司 | Miniaturized short-distance optical system |
| TWI800711B (en) * | 2020-03-06 | 2023-05-01 | 廣達電腦股份有限公司 | Optical system of miniature head-mounted display |
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| CN111766705A (en) * | 2020-06-19 | 2020-10-13 | 江西微瑞光学有限公司 | Short-distance and high-lens-birefringence-tolerance optical imaging module |
| WO2022033233A1 (en) * | 2020-08-13 | 2022-02-17 | 京东方科技集团股份有限公司 | Near-to-eye display apparatus |
| WO2022088836A1 (en) * | 2020-10-26 | 2022-05-05 | 深圳惠牛科技有限公司 | Display optical system and head-mounted display apparatus which reduce ghosting |
| CN112666708A (en) * | 2020-12-24 | 2021-04-16 | 业成科技（成都）有限公司 | Composite optical device and manufacturing method thereof |
| CN112731676A (en) * | 2021-01-04 | 2021-04-30 | 业成科技（成都）有限公司 | Optical system |
| CN112731676B (en) * | 2021-01-04 | 2022-07-29 | 业成科技（成都）有限公司 | Optical system |
| CN114967135A (en) * | 2021-02-25 | 2022-08-30 | 双莹科技股份有限公司 | Ultra-short distance ocular lens system |
| WO2023245333A1 (en) * | 2022-06-20 | 2023-12-28 | 歌尔光学科技有限公司 | Optical module and head-mounted display device |
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