CN109031647A - Optical amplifier method, optical amplifier mould group and amplification system - Google Patents
Optical amplifier method, optical amplifier mould group and amplification system Download PDFInfo
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- CN109031647A CN109031647A CN201810653958.9A CN201810653958A CN109031647A CN 109031647 A CN109031647 A CN 109031647A CN 201810653958 A CN201810653958 A CN 201810653958A CN 109031647 A CN109031647 A CN 109031647A
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- polarizing film
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of optical amplifier method, optical amplifier mould group and amplification systems, the optical amplifier mould group includes: at least two polarizing films, first polarizing film is positioned close to object side, second polarizing film is positioned close to image side, and the transmission direction of first polarizing film is consistent with the first linear polarization direction；Optically-active part is arranged between first polarizing film and second polarizing film, for the polarization direction of optical imagery to rotate by a certain angle；Imaging len is arranged between first polarizing film and second polarizing film, for amplifying the optical imagery at least twice.It the advantage is that, using optically-active part, reducing the optical element quantity in optical amplifier mould group, shortening the installation space in each optical element, keep the volume of entire mould group smaller, quality is lighter, and it is more preferable to improve experience of user when using amplification system.
Description
Technical field
The present invention relates to optical technical field more particularly to a kind of optical amplifier methods, optical amplifier mould group and amplification system
System.
Background technique
In the prior art in optical amplifier modular structure, for the image quality and enlargement ratio for meeting optical amplifier mould group,
Multiple optical devices are generally comprised in mould group, since each optical device needs certain installation space, by multiple optics
Often size and volume are bigger for the optical amplifier mould group of device composition.For existing intelligence VR equipment on the market, including
VR intelligent glasses, intelligent helmet and various wear show equipment etc., are to guarantee there is biggish enlargement ratio in use process, it is necessary to
Increase the radius of curvature of convex mirror or increases convex mirror at a distance from display screen, and the improvement result of both schemes has been exactly
The eyeglass of amplification is very thick or eyeglass between screen at a distance from it is excessive, final result be all entire optical amplification system excessively
Heaviness, final complete machine is also inevitable heavy, feels extremely uncomfortable during using wearing, directly influences using effect.
And in order to improve customer experience effect, existing wearable VR intelligent glasses are all guaranteeing that its is higher at image quality
Amount simultaneously, reduces its optical amplifier modular structure with larger field angle as far as possible, to reduce the size of final finished, realizes
Lightweight and comfortableization.Such as patent: short distance optical amplifier mould group, amplification method and amplification system (publication number:
CN105629472A), optical amplifier mould group disclosed in includes first phase delay piece, imaging len, second phase delay
Piece, reflective polarizer, used imaging len is in the first photofacial close to first phase delay piece in above system
Divide reflective portion transmission, in specification it is found that the imaging len is curved surface on one side, another side is plane, the imaging in the system
Lens are convex mirror or spherical mirror, in order to guarantee that amplification effect must assure that in system there is one or more convex mirrors, thus entirely
Optical amplifier mould packet size is still bigger, to keep entire optical amplification system excessively heavy, and multiple reflections and absorption cause
The loss of light energy is serious, dark images in the visual field.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the present invention to provide a kind of optical amplifier methods, optics
Amplify mould group and amplification system, while guaranteeing enlargement ratio and image quality, reduces the size of entire mould group, it is whole to reduce
The size of a amplification system.
The purpose of the present invention adopts the following technical scheme that realization:
A kind of optical amplifier method, comprising:
At least two polarizing films are set, the second polarization including the first polarizing film close to object side and close to image side
Piece, the optical imagery across the first polarizing film have the first linear polarization direction；
Optically-active part is set, between first polarizing film and second polarizing film；
Optical imagery is set and at least passes through the optically-active part three times, wherein optical imagery passes through the optically-active part at least once
There is the second linear polarization direction later, the second linear polarization direction is orthogonal with the transmission direction of the second polarizing film, has second
The optical imagery of linear polarization direction has third linear polarization direction, third linear polarization after passing through optically-active part at least once
Direction is orthogonal with the transmission direction of first polarizing film；Optical imagery with third linear polarization direction passes through at least once
There is the 4th linear polarization direction, the transmission direction of the 4th linear polarization direction and second polarizing film after optically-active part
Unanimously；
Imaging len is set, and between first polarizing film and second polarizing film, the optical imagery is at least
Imaging len is passed through three times, is at least amplified twice.
Further, the transmission direction of transmission direction and second polarizing film that first polarizing film is arranged is in 45 °,
The odd-multiple that the optically-active angle of the optically-active part is 45 ° is set.
Further, the imaging len of setting is Fresnel Lenses, and the serrated face of the Fresnel Lenses is set towards object side
It sets.
The purpose of the present invention can also adopt the following technical scheme that realization, a kind of optical amplifier mould group, comprising:
At least two polarizing films, the first polarizing film are positioned close to object side, and second polarizing film is positioned close to image side,
The transmission direction of first polarizing film is consistent with the first linear polarization direction；
Optically-active part is arranged between first polarizing film and second polarizing film, for by the polarization of optical imagery
Direction rotates by a certain angle；
Imaging len is arranged between first polarizing film and second polarizing film, for amplifying institute at least twice
State optical imagery；Wherein, the optically-active part by the first linear polarization direction for being switched to have the polarization direction of optical imagery
Second linear polarization direction, second linear polarization direction are orthogonal with the transmission direction of second polarizing film；The optically-active
Part is also used to the polarization direction of optical imagery switching to third linear polarization direction, the third line by the second linear polarization direction
Property polarization direction is orthogonal with the transmission direction of first polarizing film；The optically-active part is also used to the polarization direction of optical imagery
4th linear polarization direction, the 4th linear polarization direction and second polarizing film are switched to by third linear polarization direction
Transmission direction is consistent.
Further, the transmission direction of first polarizing film and the transmission direction of second polarizing film are in 45 ° of angles,
The odd-multiple that the optically-active angle of the optically-active part is 45 °.
Further, the imaging len is Fresnel Lenses, and the serrated face of the Fresnel Lenses is arranged towards object side.
Further, the optically-active part is optically-active film.
Further, first polarizing film and second polarizing film are film layer structure or flake structure.
The purpose of the present invention can also adopt the following technical scheme that realization, a kind of optical amplification system, including above-mentioned light
Amplification mould group and screen are learned, screen position is the object side in the optical amplifier mould group, the optical amplifier mould group and institute
Screen coaxial arrangement is stated, is connected with the electronic device for generating optical imagery on the screen.
Further, system further includes the optical element for not influencing the polarization state and phase delay of optical imagery, described
Optical element be arranged between the optical amplifier mould group and the screen, alternatively, setting first polarizing film, it is described at
As between any two in lens, the optically-active part, second polarizing film, alternatively, being arranged in the optical amplifier mould group
Between image side.
Compared with prior art, the beneficial effects of the present invention are:
Optically-active part is set in optical amplifier mould group, changes the polarization direction of optical imagery by optically-active part, makes optical picture
As being reflected between two polarizing films, to repeatedly pass through imaging len, repeatedly amplifies, extend optical path, compare existing amplification
Mould group, reduces the use of phase delay chip and semi-transparent semi-reflecting film, to simplify structure, reduces the volume of entire mould group, together
When, reduce consumption of the semi-transparent semi-reflecting film for light energy, improves image quality, make the optical amplification system for applying the mould group
More light weight is compact, and whole equipment is made to have a biggish field angle, eye movement range, the imaging effect of high quality and whole small
Size superthin structure brings better experience to user.
Detailed description of the invention
Fig. 1 is the optical path flow diagram of optical amplifier method of the present invention；
Fig. 2 is the structural schematic diagram of an embodiment of optical amplifier mould group of the present invention, and which show optical imagerys in mould group
In change of polarization and optical path；
Fig. 3 is the structural schematic diagram of another embodiment of optical amplifier mould group of the present invention, and which show optical imagerys in mould
Change of polarization and optical path in group；
Fig. 4 is the structural schematic diagram of an embodiment of optical amplification system of the present invention, is optical amplifier mould group in dashed box；
Fig. 5 is the structural schematic diagram of another embodiment of optical amplification system of the present invention, is optical amplifier mould group in dashed box；
Fig. 6 is the structural schematic diagram for the embodiment that optical amplification system of the present invention is packed into optical element；
Fig. 7 is the structural schematic diagram for another embodiment that optical amplification system of the present invention is packed into optical element；
Fig. 8 is the experiment optical path effect diagram based on optical amplifier mould group embodiment of the invention；
In figure:
1, the first polarizing film；2, the second polarizing film；3, optically-active part；4, imaging len；5, screen；6, optical element.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term " center " for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as limiting specific protection scope of the invention.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " several " are meant that two or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to mechanical connect
It connects；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Referring to attached drawing 1 to Fig. 8, the embodiment of optical amplifier method according to the present invention, optical amplifier mould group and amplification system
It will be set forth in following description, wherein optical amplifier mould group solves the problems, such as that modular volume is excessive, to make to apply
There is the volume-diminished of the amplification system of the optical amplifier mould group, convenient for wearing, improves user experience.
As shown in Figure 1, which show the signals of the optical path process of optical amplifier method according to an embodiment of the invention
Figure, this method comprises:
At least two polarizing films are set, the second polarization including the first polarizing film 1 close to object side and close to image side
Piece 2, the optical imagery across the first polarizing film 1 have the first linear polarization direction；
Optically-active part 3 is set, between the first polarizing film 1 and the second polarizing film 2；
Optical imagery is set and at least passes through optically-active part 3 three times, wherein optical imagery has after passing through optically-active part 3 at least once
There is the second linear polarization direction, the second linear polarization direction is orthogonal with the transmission direction of the second polarizing film 2, linear inclined with second
The optical imagery in vibration direction has third linear polarization direction, third linear polarization direction after passing through optically-active part 3 at least once
It is orthogonal with the transmission direction of the first polarizing film 1；Optical imagery with third linear polarization direction passes through optically-active part 3 at least once
There is the 4th linear polarization direction later, the 4th linear polarization direction is consistent with the transmission direction of the second polarizing film 2；
Imaging len 4 is set, and between the first polarizing film 1 and the second polarizing film 2, optics optical imagery is at least worn three times
Imaging len 4 is crossed, is at least amplified twice.
The quantity of above-mentioned optically-active part 3 can be one, after optical imagery once passes through an optically-active part 3, can will be inclined
Vibration direction switchs to the second linear polarization direction, and switchs to third linear polarization direction, Yi Jicong from the second linear polarization direction
Third linear polarization direction switchs to the 4th linear polarization direction, may also set up multiple optically-active parts 3, and optical imagery is made to pass through multiple rotations
After light part 3, polarization direction is switched into the second linear polarization direction, and from the second linear polarization direction to switch to third linear inclined
Shake direction, and switchs to the 4th linear polarization direction from third linear polarization direction.
As shown in attached drawing 2 and attached drawing 3, as the implementation structural schematic diagram of a preferred embodiment of the present invention, setting the
The transmission direction of one polarizing film 1 and the transmission direction of the second polarizing film 2 are in 45 °, and the optically-active angle of setting optically-active part 3 is 45 °
Odd-multiple, more specifically,
As shown in Fig. 2, more specifically, the quantity of optically-active part 3 is that one or multiple optically-active parts 3 are combined with each other, realize
45 ° are rotated to the polarization direction of optical imagery, single optically-active part 3 or the multiple optically-active parts 3 being combined with each other setting are saturating in imaging
Between mirror 4 and the first polarizing film 1, optical path is as follows:
Optical imagery is issued from object side, passes through the first polarizing film 1, and polarization direction switchs to the first linear polarization direction, then
Optical imagery with the first linear polarization direction passes through optically-active part 3, and polarization direction rotates 45 °, from the first linear polarization direction
Switch to the second linear polarization direction, then optical imagery passes through imaging len 4, is once amplified, then optical imagery reaches
Second polarizing film 2, since the transmission direction of the first polarizing film 1 and the transmission direction of the second polarizing film 2 are in 45 °, the second line
Property polarization direction it is orthogonal with the perspective direction of the second polarizing film 2, optical imagery is totally reflected by the second polarizing film 2, and it is saturating to pass through imaging
Mirror 4 again passes through optically-active part 3, and polarization direction rotates 45 ° again, switchs to third linear polarization side from the second linear polarization direction
To at this point, third linear polarization direction is orthogonal with the transmission direction of the first polarizing film 1, therefore, optical imagery is by the first polarizing film
1 total reflection again passes through optical rotation plate, and polarization direction rotates 45 °, and polarization direction switchs to the 4th linearly by third linear polarization direction
Polarization direction, then optical imagery again passes through imaging len 4, carries out secondary amplification, at this point, the 4th linear polarization direction and the
The transmission direction of two polarizing films 2 is consistent, therefore the optical imagery with the 4th linear polarization direction may pass through the second polarizing film 2.
By optically-active part 3, change the polarization direction of optical imagery, substantially prolong optical path, while optical imagery being made to carry out secondary amplification,
Image quality is improved, optical element is reduced, mitigates the volume for amplifying mould group and quality significantly.
It should be noted that be in attached drawing 2 by taking the first polarizing film 1 and the second polarizing film 2 are P light polarization plate as an example, but
First polarizing film 1 and the second polarizing film 2 are not limited by the polarization direction in attached drawing 2, and the first polarizing film 1 and the second polarizing film 2 are also
It can be S light polarization plate, meanwhile, in attached drawing 2 by taking the optical direction of optically-active part 3 is counterclockwise as an example, the optical direction of optically-active part 3
It is not limited by the optical direction in attached drawing 2, the optical direction of optically-active part 3 can also be for clockwise.
As shown in figure 3, more specifically, the quantity of optically-active part 3 is that one or multiple optically-active parts 3 are combined with each other, realize
45 ° are rotated to the polarization direction of optical imagery, single optically-active part 3 or the multiple optically-active parts 3 being combined with each other setting are saturating in imaging
Between mirror 4 and the second polarizing film 2, optical path is as follows:
Optical imagery is issued from object side, passes through the first polarizing film 1, and polarization direction switchs to the first linear polarization direction, then
Optical imagery with the first linear polarization direction passes through imaging len 4, is once amplified, and then optical imagery passes through optically-active
Part 3, polarization direction rotate 45 °, switch to the second linear polarization direction from the first linear polarization direction, then, then optical imagery
Reach the second polarizing film 2, since the transmission direction of the first polarizing film 1 and the transmission direction of the second polarizing film 2 are in 45 °, the
Bilinear polarization direction is orthogonal with the perspective direction of the second polarizing film 2, and optical imagery is totally reflected by the second polarizing film 2, wears again
Optically-active part 3 is crossed, polarization direction rotates 45 ° again, switchs to third linear polarization direction from the second linear polarization direction, then again
Across imaging len 4, the first polarizing film 1 is arrived at, at this point, the transmission direction of third linear polarization direction and the first polarizing film 1 is just
It hands over, therefore, optical imagery is totally reflected by the first polarizing film 1, and optical imagery again passes through imaging len 4, secondary amplification is carried out, and
Optical rotation plate is passed through afterwards, and polarization direction rotates 45 ° again, and polarization direction switchs to the 4th linear polarization side by third linear polarization direction
To the second polarizing film 2 of arrival at this point, the 4th linear polarization direction is consistent with the transmission direction of the second polarizing film 2, therefore has
The optical imagery of 4th linear polarization direction may pass through the second polarizing film 2.By optically-active part 3, change the polarization side of optical imagery
To substantially prolonging optical path, while optical imagery being made to carry out secondary amplification, improve image quality, reduce optical element, make to amplify
The volume and quality of mould group mitigate significantly.
It should be noted that be in attached drawing 3 by taking the first polarizing film 1 and the second polarizing film 2 are P light polarization plate as an example, but
First polarizing film 1 and the second polarizing film 2 are not limited by the polarization direction in attached drawing 3, and the first polarizing film 1 and the second polarizing film 2 are also
It can be S light polarization plate, meanwhile, in attached drawing 3 by taking the optical direction of optically-active part 3 is counterclockwise as an example, the optical direction of optically-active part 3
It is not limited by the optical direction in attached drawing 3, the optical direction of optically-active part 3 can also be for clockwise.
In addition, in order to further reduce the volume of amplification mould group, imaging len 4 selects Fresnel Lenses, Fresnel Lenses
Serrated face towards object side be arranged, the size of Fresnel Lenses is smaller relative to existing convex mirror, make amplify module internal have more
More installation space, so that optical amplifier mould group is compressed within 12mm.More specifically, Fresnel Lenses focal length is f=
50~70mm, 45~65mm of diameter are made of PMMA material, and quality is lighter.
In addition, in order to realize above-mentioned amplification method, the present invention also provides a kind of optical amplifier mould group, including at least two partially
Shake piece, and the first polarizing film 1 is positioned close to object side, and the second polarizing film 2 is positioned close to image side, the transmission side of the first polarizing film 1
To consistent with the first linear polarization direction；
Optically-active part 3 is arranged between the first polarizing film 1 and the second polarizing film 2, for revolving the polarization direction of optical imagery
Turn certain angle；
Imaging len 4 is arranged between the first polarizing film 1 and the second polarizing film 2, for amplifying optical picture at least twice
Picture；Wherein, optically-active part 3 is used to switch to the polarization direction of optical imagery by the first linear polarization direction to have the second linear polarization
Direction, the second linear polarization direction are orthogonal with the transmission direction of the second polarizing film 2；Optically-active part 3 is also used to the inclined of optical imagery
Vibration direction switchs to third linear polarization direction, third linear polarization direction and the first polarizing film 1 by the second linear polarization direction
Transmission direction is orthogonal；Optically-active part 3 is also used to the polarization direction of optical imagery switching to the 4th by third linear polarization direction linear
Polarization direction, the 4th linear polarization direction are consistent with the transmission direction of the second polarizing film 2.
Preferably, as shown in attached drawing 2 and attached drawing 3, the transmission side of the transmission direction of the first polarizing film 1 and the second polarizing film 2
To being in 45 ° of angles, the odd-multiple that the optically-active angle of optically-active part 3 is 45 °.More specifically, as shown in Fig. 2, more specifically, revolving
The quantity of light part 3 is that one or multiple optically-active parts 3 are combined with each other, and realizes and rotates 45 ° to the polarization direction of optical imagery, list
A optically-active part 3 or the multiple optically-active parts 3 being combined with each other are arranged between imaging len 4 and the first polarizing film 1, and optical path is as follows:
Optical imagery is issued from object side, passes through the first polarizing film 1, and polarization direction switchs to the first linear polarization direction, then
Optical imagery with the first linear polarization direction passes through optically-active part 3, and polarization direction rotates 45 °, from the first linear polarization direction
Switch to the second linear polarization direction, then optical imagery passes through imaging len 4, is once amplified, then optical imagery reaches
Second polarizing film 2, since the transmission direction of the first polarizing film 1 and the transmission direction of the second polarizing film 2 are in 45 °, the second line
Property polarization direction it is orthogonal with the perspective direction of the second polarizing film 2, optical imagery is totally reflected by the second polarizing film 2, and it is saturating to pass through imaging
Mirror 4 again passes through optically-active part 3, and polarization direction rotates 45 ° again, switchs to third linear polarization side from the second linear polarization direction
To at this point, third linear polarization direction is orthogonal with the transmission direction of the first polarizing film 1, therefore, optical imagery is by the first polarizing film
1 total reflection again passes through optical rotation plate, and polarization direction rotates 45 °, and polarization direction switchs to the 4th linearly by third linear polarization direction
Polarization direction, then optical imagery again passes through imaging len 4, carries out secondary amplification, at this point, the 4th linear polarization direction and the
The transmission direction of two polarizing films 2 is consistent, therefore the optical imagery with the 4th linear polarization direction may pass through the second polarizing film 2.
By optically-active part 3, change the polarization direction of optical imagery, substantially prolong optical path, while optical imagery being made to carry out secondary amplification,
Image quality is improved, optical element is reduced, mitigates the volume for amplifying mould group and quality significantly.
It should be noted that be in attached drawing 2 by taking the first polarizing film 1 and the second polarizing film 2 are P light polarization plate as an example, but
First polarizing film 1 and the second polarizing film 2 are not limited by the polarization direction in attached drawing 2, and the first polarizing film 1 and the second polarizing film 2 are also
It can be S light polarization plate, meanwhile, in attached drawing 2 by taking the optical direction of optically-active part 3 is counterclockwise as an example, the optical direction of optically-active part 3
It is not limited by the optical direction in attached drawing 2, the optical direction of optically-active part 3 can also be for clockwise.
As shown in figure 3, more specifically, the quantity of optically-active part 3 is that one or multiple optically-active parts 3 are combined with each other, realize
45 ° are rotated to the polarization direction of optical imagery, single optically-active part 3 or the multiple optically-active parts 3 being combined with each other setting are saturating in imaging
Between mirror 4 and the second polarizing film 2, optical path is as follows:
Optical imagery is issued from object side, passes through the first polarizing film 1, and polarization direction switchs to the first linear polarization direction, then
Optical imagery with the first linear polarization direction passes through imaging len 4, is once amplified, and then optical imagery passes through optically-active
Part 3, polarization direction rotate 45 °, switch to the second linear polarization direction from the first linear polarization direction, then, then optical imagery
Reach the second polarizing film 2, since the transmission direction of the first polarizing film 1 and the transmission direction of the second polarizing film 2 are in 45 °, the
Bilinear polarization direction is orthogonal with the perspective direction of the second polarizing film 2, and optical imagery is totally reflected by the second polarizing film 2, wears again
Optically-active part 3 is crossed, polarization direction rotates 45 ° again, switchs to third linear polarization direction from the second linear polarization direction, then again
Across imaging len 4, the first polarizing film 1 is arrived at, at this point, the transmission direction of third linear polarization direction and the first polarizing film 1 is just
It hands over, therefore, optical imagery is totally reflected by the first polarizing film 1, and optical imagery again passes through imaging len 4, secondary amplification is carried out, and
Optical rotation plate is passed through afterwards, and polarization direction rotates 45 ° again, and polarization direction switchs to the 4th linear polarization side by third linear polarization direction
To the second polarizing film 2 of arrival at this point, the 4th linear polarization direction is consistent with the transmission direction of the second polarizing film 2, therefore has
The optical imagery of 4th linear polarization direction may pass through the second polarizing film 2.By optically-active part 3, change the polarization side of optical imagery
To substantially prolonging optical path, while optical imagery being made to carry out secondary amplification, improve image quality, reduce optical element, make to amplify
The volume and quality of mould group mitigate significantly.
It should be noted that be in attached drawing 3 by taking the first polarizing film 1 and the second polarizing film 2 are P light polarization plate as an example, but
First polarizing film 1 and the second polarizing film 2 are not limited by the polarization direction in attached drawing 3, and the first polarizing film 1 and the second polarizing film 2 are also
It can be S light polarization plate, meanwhile, in attached drawing 3 by taking the optical direction of optically-active part 3 is counterclockwise as an example, the optical direction of optically-active part 3
It is not limited by the optical direction in attached drawing 3, the optical direction of optically-active part 3 can also be for clockwise.
In order to further reduce the volume of amplification mould group, the first polarizing film 1 and the second polarizing film 2 are film layer structure or thin
Chip architecture can be separately provided, and can also be compounded on imaging len 4 or the screen 5 of object side, and the processing technology of polarizing film is answered with viscous
Conjunction technique is the prior art, is repeated no more.Meanwhile optically-active film also can be used in optically-active part 3, no matter optically-active film can be pair from which direction
The polarised light passed through rotates fixed angle, and the manufacture craft of optically-active film is the prior art, herein not reinflated description.
In addition, the imaging len 4 in the present embodiment selects Fresnel Lenses, the serrated face of Fresnel Lenses is set towards object side
It sets, the size of Fresnel Lenses is smaller relative to existing convex mirror, so that amplification module internal is had more installation spaces, thus will
Optical amplifier mould group is compressed within 12mm.More specifically, Fresnel Lenses focal length be f=50~70mm, diameter 45~
65mm is made of PMMA material, and quality is lighter.
As shown in Fig. 4, optically-active film and the first polarizing film 1 are film layer structure in the same side, to be bonded compound mode
It is compressed together, is compounded on the screen 5 of object side, the second polarizing film 2 of film layer structure is compounded in the smooth surface of Fresnel Lenses；
In addition, can also be as shown in Fig. 5, optically-active film and the second polarizing film 2 are film layer structure in the same side, to be bonded compound side
Formula is compressed together, and is compounded in the smooth surface of Fresnel Lenses, and the first polarizing film 1 of film layer structure is compounded in the screen 5 of object side
On.
In addition, the second polarizing film 2 that image side is arranged in can be absorption-type polarizing film, for absorbing the veiling glare in outside, prevent
Only parasitic reflection enters in eye, shows and interferes to optical imagery, further increases image quality.
As the application of optical amplifier mould group of the invention, the present invention also provides a kind of optical amplification system, the system packets
The optical amplifier mould group and screen 5 of above-mentioned each embodiment description are included, 5 position of screen is the object in optical amplifier mould group
Side, optical amplifier mould group and screen 5 are coaxially disposed, and the electronic device for generating optical imagery is connected on screen 5.The light of this implementation
The screen for learning amplification system can be the display screen of smart machine, such as computer, TV, can also be ultrashort burnt optical amplifier system
System is arranged in nearly eye intelligent display device, such as VR glasses, intelligent glasses, intelligent helmet or other headset equipments,.More
Specifically, the second polarizing film 2 and optically-active film or the second polarizing film 2 in optics module are arranged on Fresnel Lenses, Fei Nie
Your lens are 8mm~13mm at a distance from display screen.As a kind of ultrashort burnt optical amplification system, the nearly eye-distance of this system from for
12mm~15mm.
Based on the inherently advantageous Fresnel Lenses on weight and volume, pass through a large amount of optimizations of optical design software
And simulation, the parameter of Fresnel lenses is refined, has the case where higher clarity at holding center and around visual field
Under, shorter optics overall length and lighter weight are still kept, is designed below in conjunction with the relevant parameter in present example, other side
Case is described in detail,
Table 1 is the relevant design parameter of embodiment
| Surface number | Surface type | Y radius | Thickness | Material | Diffraction pattern |
| Object plane | Spherical surface | Infinitely | -2000.000000 | Refraction | |
| Diaphragm | Spherical surface | Infinitely | 12.000000 | Refraction | |
| 1 | Spherical surface | Infinitely | 1.000000 | PMMA | Refraction |
| 2 | Fresnel is flat | -29.505415 | 13.467982 | Refraction | |
| 3 | Spherical surface | Infinitely | -13.467982 | Reflection | |
| 4 | Fresnel is flat | -29.505415 | -1.000000 | PMMA | Refraction |
| 5 | Spherical surface | Infinitely | 1.000000 | PMMA | Reflection |
| 6 | Fresnel is flat | -29.505415 | 13.467982 | Refraction | |
| Image planes | Spherical surface | Infinitely | 0.000000 | Refraction |
Table 1 is the relative position parameter of each component, dimensional parameters, including Y radius, every distance while to lower,
The parameters such as material, aperture, material is using PMMA but is not limited to Fresnel Lenses made of PMMA.
Table 2 is the relevant parameter of the Fresnel Lenses of embodiment
| Parameter | Value |
| Y radius | -29.505415 |
| Conical surface constant | -0.810137 |
| 2 ranks are aspherical | 0.000017 |
| 4 ranks are aspherical | 6.664237e-007 |
| 6 ranks are aspherical | -2.047784e-009 |
| 8 ranks are aspherical | 1.006031e-011 |
| 10 ranks are aspherical | -2.202882e-014 |
| 12 ranks are aspherical | 1.912256e-017 |
| 14 ranks are aspherical | 0.0000000 |
| Maximum zone of dispersion | 0.0000000 |
| Region rise | 0.4000000 |
| Central area rise | 0.0000000 |
The non-spherical lens that the Fresnel Lenses used in above system optimizes with a thickness of 1mm, 12 ranks, placing direction are
Serrated face meets light, and material is selected as PMMA, diameter 50mm, the more conducively correction of oblique spherical aberration.Each coefficient in above-mentioned table 2 is full
Sufficient aspherical formula:
Wherein: r be lens on point arrive optical axis distance, c be curved surface vertex curvature, K be quadratic surface coefficient, d, e, f,
G, h, I, j are respectively 4,6,8,10,12,14,16 surface coefficients.
It is any that arc (is including but not limited to used by parameter values transformation or the variation of basal surface Fresnel Lenses form
Face substrate, multi-disc lens are glued or combined optical texture), the lens combination of optical amplifier optical path, putting in order changes etc. all
It should be in the protection scope of this patent.
The optical system totality focal length of above-described embodiment is 28.94mm, and F number is 3.61, distortion-at maximum field of view
30.17778%, the eye movement range of people is 8mm, the display suitable for resolution ratio 2,000,000 and the above pixel.Optics overall diameter
47mm, optical system are 12mm with a thickness of 14.568mm, eye-observation distance.It should be noted that the index path such as Fig. 8 formed
Shown, which is coloured picture, and optical path is divided into tri- road light of RGB, examines requirement to meet, now switchs to non-coloured picture, the present embodiment
Description is not limited by Fig. 8.The embodiment of above-mentioned parameter can preferably be applied to VR glasses in, make its possess biggish field angle,
Higher image quality, lower distortion, ultra-thin size and the advantage suitable for eye-observation, will bring good to user
The experience adaptable scene of the invention is applicable in addition to VR glasses, also wears display comprising various intelligent glasses, intelligence, nearly eye is shown
In the wearable device shown, it will not repeat them here.
In addition, as shown in Figure 6 and Figure 7, system further includes the light for not influencing the polarization state and phase delay of optical imagery
Part 6 is learned, optical element 6 is arranged between optical amplifier mould group and screen 5, alternatively, setting is saturating in the first polarizing film 1, imaging
Mirror 4, optically-active part 3, between any two in the second polarizing film 2, alternatively, being arranged between optical amplifier mould group and image side.Such as
It is the setting of optical element 6 in optical amplifier mould group and as between, optical imagery is being worn after optical amplifier mould group shown in Fig. 6
Corresponding optical element 6 is crossed, to meet the different demands of user.Such as Fig. 7, because of the first polarizing film 1, the second polarizing film 2 and rotation
Light part 3 is film layer structure, and the first polarizing film 1 is compounded on screen 5, and the second polarizing film 2 is compounded in the smooth surface of Fresnel Lenses
On, optically-active film is compounded on the first polarizing film 1 or the second polarizing film 2, and therefore, optical element 6 is arranged in Fresnel Lenses and rotation
Between light film and it is located at before the serrated face of Fresnel Lenses, which can be one or more, realize different effects
Fruit, but do not change polarization direction and the phase of optical imagery.
It needs it is noted that with the position of optical element 6 in optical amplifier mould group and as between in attached drawing 6 and attached drawing 7
And shown in setting explains for optical element 6 is arranged between Fresnel Lenses and the first polarizing film 1, but optics zero
The position of part 6 is not limited by the position in attached drawing 6 and attached drawing 7, but the first polarizing film 1, the second polarizing film 2 and optically-active part 3 are not
When film layer structure or the optical element of insertion 6 are film layer structure, optical element 6 can also be provided at the second polarizing film 2 and Fresnel
Between lens, alternatively, between optically-active part 3 and Fresnel Lenses and being located at after the smooth surface of Fresnel Lenses, alternatively, being located at
Between Fresnel Lenses and the first polarizing film 1, alternatively, between the first polarizing film 1 and screen 5.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
1. a kind of optical amplifier method characterized by comprising
At least two polarizing films are set, including the first polarizing film close to object side and the second polarizing film close to image side, are worn
The optical imagery for crossing the first polarizing film has the first linear polarization direction；
Optically-active part is set, between first polarizing film and second polarizing film；
Optical imagery is set and at least passes through the optically-active part three times, after wherein optical imagery passes through the optically-active part at least once
With the second linear polarization direction, the second linear polarization direction is orthogonal with the transmission direction of the second polarizing film, linear with second
The optical imagery of polarization direction has third linear polarization direction, third linear polarization direction after passing through optically-active part at least once
It is orthogonal with the transmission direction of first polarizing film；Optical imagery with third linear polarization direction passes through optically-active at least once
There is the 4th linear polarization direction, the transmission direction one of the 4th linear polarization direction and second polarizing film after part
It causes；
Imaging len is set, and between first polarizing film and second polarizing film, the optical imagery is at least three times
Across imaging len, at least amplified twice.
2. optical amplifier method as described in claim 1, which is characterized in that the transmission direction of setting first polarizing film with
The transmission direction of second polarizing film is in 45 °, and the odd-multiple that the optically-active angle of the optically-active part is 45 ° is arranged.
3. optical amplifier method as described in claim 1, which is characterized in that the imaging len of setting is Fresnel Lenses, institute
The serrated face for stating Fresnel Lenses is arranged towards object side.
4. a kind of optical amplifier mould group characterized by comprising
At least two polarizing films, the first polarizing film are positioned close to object side, and the second polarizing film is positioned close to image side, and described first
The transmission direction of polarizing film is consistent with the first linear polarization direction；
Optically-active part is arranged between first polarizing film and second polarizing film, for by the polarization direction of optical imagery
It rotates by a certain angle；
Imaging len is arranged between first polarizing film and second polarizing film, for amplifying the light at least twice
Learn image；Wherein, the optically-active part is used to switch to the polarization direction of optical imagery by the first linear polarization direction to have second
Linear polarization direction, second linear polarization direction are orthogonal with the transmission direction of second polarizing film；The optically-active part is also
For the polarization direction of optical imagery to be switched to third linear polarization direction by the second linear polarization direction, the third linear is inclined
Vibration direction is orthogonal with the transmission direction of first polarizing film；The optically-active part is also used to the polarization direction of optical imagery by
Three linear polarization directions switch to the 4th linear polarization direction, the transmission of the 4th linear polarization direction and second polarizing film
Direction is consistent.
5. optical amplifier mould group as claimed in claim 4, which is characterized in that the transmission direction of first polarizing film with it is described
The transmission direction of second polarizing film is in 45 ° of angles, the odd-multiple that the optically-active angle of the optically-active part is 45 °.
6. optical amplifier mould group as claimed in claim 4, which is characterized in that the imaging len is Fresnel Lenses, described
The serrated face of Fresnel Lenses is arranged towards object side.
7. the optical amplifier mould group as described in claim 4 or 5 or 6, which is characterized in that the optically-active part is optically-active film.
8. the optical amplifier mould group as described in claim 4 or 5 or 6, which is characterized in that first polarizing film and described second
Polarizing film is film layer structure or flake structure.
9. a kind of optical amplification system, which is characterized in that including as described in claim 4-8 any bar optical amplifier mould group and
Screen, screen position are the object side in the optical amplifier mould group, and the optical amplifier mould group is coaxially set with the screen
It sets, the electronic device for generating optical imagery is connected on the screen.
10. optical amplification system as claimed in claim 9, which is characterized in that system further includes do not influence optical imagery inclined
The optical element of vibration state and phase delay, the optical element are arranged between the optical amplifier mould group and the screen,
Alternatively, first polarizing film, the imaging len, the optically-active part, any two in second polarizing film are arranged in
Between, alternatively, being arranged between the optical amplifier mould group and image side.
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| CN111610630A (en) * | 2019-02-22 | 2020-09-01 | 舜宇光学（浙江）研究院有限公司 | Display optical machine and method thereof and near-to-eye display equipment |
| 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 |
| CN114967135A (en) * | 2021-02-25 | 2022-08-30 | 双莹科技股份有限公司 | Ultra-short distance ocular lens system |
| CN116699854A (en) * | 2023-07-27 | 2023-09-05 | 北京极溯光学科技有限公司 | Perspective optical system and equipment capable of realizing display shielding |
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