CN106125265B - Projection imaging system - Google Patents
Projection imaging system Download PDFInfo
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- CN106125265B CN106125265B CN201610681234.6A CN201610681234A CN106125265B CN 106125265 B CN106125265 B CN 106125265B CN 201610681234 A CN201610681234 A CN 201610681234A CN 106125265 B CN106125265 B CN 106125265B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of projection imaging systems, belong to projection art.It is able to solve the problem that projection imaging system resolution ratio is low in the related technology.Projection imaging system successively includes light valve, vibration eyeglass and projection lens along the optical path that image strip is emitted, and the center-biased of light valve is in the optical axis of projection lens；Light valve is used to modulate the light beam come in projector from light-source system propagation, so that light valve generates image strip, and image strip directive is vibrated eyeglass；Vibration eyeglass vibrates so that be not exclusively overlapped by the corresponding image strip of adjacent two frames projected image of vibration eyeglass, and by the corresponding image strip of adjacent two frames projected image successively directive projection lens；When image strip from vibration eyeglass directive projection lens when, projection lens for correct, magnified image light beam, and will correction, amplified image strip projection on the projection screen.
Description
Technical field
The present invention relates to projection art, in particular to a kind of projection imaging system.
Background technique
With the raising of science and technology, projection imaging system in people's work and life using more and more extensive, than
Such as education, handle official business, household or amusement, for example, projection imaging system is differentiated for projection imaging system used in home theater
Rate is higher, and user's viewing experience is higher.Therefore, requirement of the people to projection imaging system is also higher and higher.
In the related technology, it is intended in home projector equipment using ultrashort out-of-focus projection's equipment, ultrashort out-of-focus projection's imaging system
It include: light valve, lens group and reflecting mirror；Wherein, light valve is for generating image strip, and image strip initially enters lens group, thoroughly
Image strip is imaged microscope group, then passes through curved reflector secondary imaging and imaging is reflected on screen, be in by screen
Ready-made picture completes projection.
During stating projection imaging system in realization, inventor's discovery projection imaging system not only light in the prior art
The resolution ratio of valve is lower, cannot generate high-resolution image strip, and the analytic ability of projection lens is relatively low, to cause to throw
Shadow camera lens can not parse high-resolution image strip；Two factors cause to keep the resolution ratio of projection imaging system lower jointly.
Summary of the invention
Resolution ratio in order to solve the problems, such as projection imaging system present in the relevant technologies is lower, and the present invention provides one kind
Projection imaging system.Projection imaging system successively includes light valve, vibration eyeglass and projection lens along the optical path that image strip is emitted
Head, the center-biased of light valve is in the optical axis of projection lens；
Light valve is used to modulate the light beam come in projector from light-source system propagation, so that light valve generates image strip, and
Image strip directive is vibrated into eyeglass；
It vibrates eyeglass and vibrates the corresponding endless full weight of image strip of adjacent two frames projected image so that by vibrating eyeglass
It is folded, and successively directive projection lens, projected image are image strip process by the corresponding image strip of adjacent two frames projected image
The image presented on the projection screen after projection imaging system；
When image strip from vibration eyeglass directive projection lens when, projection lens for correct, magnified image light beam, and will
Correction, the projection of amplified image strip are on the projection screen.
The projection imaging system provided in the embodiment of the present invention, including light valve, vibration eyeglass and projection lens.Vibrate eyeglass
So that being not exclusively overlapped by the corresponding image strip of adjacent two frames projected image of vibration eyeglass, since image strip is incomplete
Overlapping, so that the image strip of the same pixel of directive increases, and then improves the resolution ratio of imaging, and the vibration due to vibrating eyeglass
It is dynamic so that the corresponding image strip of adjacent two frames projected image is slightly misaligned so that excessively more smooth between pixel,
To improve the fine and smooth sense of imaging, and then improve image quality；Meanwhile by projection lens correction, magnified image light beam, then
Just on the projection screen by correction, the projection of amplified image strip, the image of more high quality is presented.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and in specification together principle for explaining the present invention.
Fig. 1 is a kind of schematic diagram for projection imaging system that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides a kind of projection imaging system schematic diagram；
Fig. 3 is a kind of image offset mirror and its vibrating effect schematic diagram that one embodiment of the invention provides；
Fig. 4 is a kind of schematic diagram of the optical path for projection imaging system imaging that one embodiment of the invention provides；
Fig. 5 is a kind of use schematic diagram for projection imaging system that one embodiment of the invention provides；
Fig. 6 is a kind of imaging schematic diagram for projection imaging system that one embodiment of the invention provides.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
Example being described in detail in claims, some aspects of the invention are consistent.
Embodiment one
One embodiment of the invention provides a kind of projection imaging system, and Fig. 1 is the schematic diagram of projection imaging system, such as Fig. 1 institute
Show, the optical path that projection imaging system is emitted along image strip successively includes light valve 110, vibration eyeglass 120 and projection lens
130, the center-biased of light valve 110 is in the optical axis 101 of projection lens 130；
Further, light valve 110 is used to modulate the light beam come in projector from light-source system propagation, so that light valve 110
Image strip is generated, and image strip directive is vibrated into eyeglass 120；
Eyeglass 120 is vibrated to vibrate so that passing through the corresponding image strip of adjacent two frames projected image of vibration eyeglass 120 not
It is completely overlapped, and successively directive projection lens 130, projected image are image by the corresponding image strip of adjacent two frames projected image
The image that light beam is presented on the projection screen after projection imaging system；
When image strip from vibration 120 directive projection lens 130 of eyeglass when, projection lens 130 for correct, magnified image
Light beam, and on the projection screen by correction, the projection of amplified image strip.
In conclusion the projection imaging system provided in the embodiment of the present invention, including light valve, vibration eyeglass and projection lens
Head.Vibration eyeglass is overlapped the corresponding image strip of adjacent two frames projected image by vibrating eyeglass not exclusively, due to shadow
As light beam is not exclusively overlapped, so that the image strip of the same pixel of directive increases, and then improves the resolution ratio of imaging, and due to
The vibration of eyeglass is vibrated so that the corresponding image strip of adjacent two frames projected image is slightly misaligned, so that the mistake between pixel
Degree is more smooth, to improve the fine and smooth sense of imaging, and then improves image quality；Meanwhile passing through projection lens correction, amplification shadow
As light beam, then just correction, amplified image strip are projected on the projection screen, the image of more high quality is presented.
Embodiment two
Another embodiment of the present invention provides a kind of projection imaging system, Fig. 2 is projection imaging system, as shown in Fig. 2, projection
Imaging system includes: light valve 210, vibration eyeglass 211 and projection lens 200.
Light valve 210 is used to modulate the light beam come in projector from light-source system propagation, so that light valve 210 generates image light
Beam, and image strip directive is vibrated into eyeglass 211.
Optionally, light valve 210 be digital micromirror elements (English: Digital Micromirror Device, referred to as:
DMD), DMD can be 2K resolution ratio or 3K resolution ratio.
In addition, light valve 210 includes reflection mirror array and control circuit, and when light valve 210 is by illumination, control circuit control
The light beam that reflection mirror array reflection source system is launched generates image strip.How related light valve 210 specifically generates image light
Beam is the prior art, not described in detail herein.
In addition, vibration eyeglass 211 is located between light valve 210 and the first lens group 220, vibration eyeglass 211 is plate glass
Or reflecting mirror.Vibration eyeglass 211 can vibrate, and vibration eyeglass 211 vibrates the adjacent two frame projection so that by vibrating eyeglass 211
The corresponding image strip of image is not exclusively overlapped, so that the image strip of the same pixel of directive increases, and then improves point of imaging
Resolution, and since the vibration of vibration eyeglass 211 is so that the corresponding image strip of adjacent two frames projected image is slightly misaligned, in turn
So that it is excessively more smooth between pixel, to improve the fine and smooth sense of imaging, and then image quality is improved, realizes high-resolution
Image quality, concrete methods of realizing is as follows:
Vibrating eyeglass 211 includes driving assembly, and driving assembly can be vibrated according to preset frequency, when driving assembly shakes
When dynamic, it (is the one kind shown according to a further exemplary embodiment referring to Fig. 3, Fig. 3 that driving assembly, which drives the vibration vibration of eyeglass 211,
Vibrate eyeglass 211 and its vibrating effect schematic diagram).In addition, adjacent two frames projected image includes first frame projected image and second
Frame projected image (first frame projected image and the second frame projected image are obtained by same frame picture breakdown).When the first frame is thrown
The corresponding image strip of shadow image and the corresponding image strip of the second frame projected image pass through the vibration eyeglass 211 respectively
When, the vibration eyeglass 211 is in different location.Specifically, image to be shown has first resolution, image signal process
System by picture breakdown to be shown at two field pictures, first frame image and the second frame image, wherein first frame image and second
Frame image has second resolution, and first resolution is greater than second resolution.When first frame image and the second frame image are expert at point
When resolution and column split rate and the inconsistent resolution ratio of DMD row and column, the row resolution ratio and column first by image to be shown are needed
Resolution adjustment is DMD row resolution ratio, after the multiple of column split rate, then carries out the decomposition of first frame image and the second frame image.
After decomposition, the row, column resolution ratio of first frame image and the second frame image is identical, and closes with the row, column resolution ratio of DMD at multiple
System, the multiple proportion are preferably 1 times.In display, when the corresponding image strip of first frame projected image is by vibration eyeglass
When 211, vibration eyeglass 211 is in first position；When the corresponding image strip of the second frame projected image is by vibration eyeglass 211
When, vibration eyeglass 211 is in the second position, first position and second position difference, so that the second frame projected image is corresponding
The propagation path of propagation path image strip corresponding from the first frame image of image strip it is different so that second
The corresponding image strip of frame projected image image strip corresponding with first frame projected image is not exclusively overlapped.For example, adjacent
Two frame projected images are projected image A and projected image B, and first position, which is vibrated by vibration eyeglass 211 towards first direction, to be generated,
The second position, which is vibrated by vibration eyeglass 211 towards second direction, to be generated, specifically, when the corresponding image strip warp of projected image A
When crossing vibrating mirror piece 211, vibration eyeglass 211 (vibrates) towards first direction vibration for example, vibration eyeglass 211 is upward；Work as projection
When the corresponding image strip of image B is by vibration eyeglass 211, vibration eyeglass 211 is vibrated towards second direction (for example, vibrating mirror
Piece 211 vibrates downwards) so that the corresponding image strip of projected image B image strip corresponding with projected image A is incomplete
Overlapping, namely be staggered slightly from one another, further, the corresponding image strip of projected image A is introduced into projection lens 200, then
The corresponding image strip of projected image B enters projection lens 200, due to the time between projected image A and the front and back projected image B
Interval is very short, so projected image A and the corresponding projected image of projected image B are almost superimposed and displayed on projection screen.By
It is slightly misaligned in the two, and is overlapped and is projected on projection screen, so that projected image A and projected image B are right on the projection screen
The excessively more smooth and exquisiteness for the pixel between projected image answered, improves the resolution ratio of projected image, to improve throwing
The quality of shadow image.
In addition, it is necessary to explanation is that first frame projected image and the second frame projected image are obtained by same frame picture breakdown,
So can achieve the increased purpose of Pixel Information amount, and then imaging could be improved when projecting to projection screen Overlapping display
Resolution ratio.
In addition, though projected image A and the corresponding projected image of projected image B can divide front and back display on the projection screen,
But the display time difference very little due to projected image A and the corresponding projected image of projected image B on the projection screen, user cannot
Resolved projection image A and the corresponding projected image of projected image B are to be separated display, thus, projected image A and projected image
The corresponding projected image of B, which can be approximated to be, is shown as a width projected image.
In addition, the embodiment of the present invention is cooperated by vibration eyeglass 211 and light valve 210, image superposition, Jin Erti are realized
The high resolution ratio of image, the corresponding present invention implement the ability that the projection lens 200 provided has high-res, to parse vibration
The high-definition picture that index glass piece 211 and the mutual cooperation of light valve 210 provide, and clearly project on projection screen.
Projection imaging system provided in an embodiment of the present invention includes light valve 210, vibration eyeglass 211 and projection lens 200, light
Valve 210 vibrates eyeglass 211 for generating image strip, and by image strip directive, is carried out by vibration eyeglass 211 to image strip
Vibration, change the position of image strip, to mention so that the image strip of the two field pictures of same frame picture breakdown be not at it is identical
Position, and then the fine and smooth sense of imaging is improved, finally, image strip is thrown by the correction of projection lens 200 and magnified image light beam
Shadow is to projection screen.Related projection lens is described as follows:
Projection lens 200 successively includes: the first lens group 220, the second lens along the direction of image strip entrance propagation
Group 230 and reflecting mirror 240.
First lens group 220, the second lens group 230 and reflecting mirror 240 are in same optical axis 201.In addition, supplementary explanation,
210 center-biased of light valve is in the optical axis 201 of projection lens 200.The offset that light valve 210 biases optical axis 201 meets: 1.2 < A/B <
1.5, wherein A is the height in the face of light valve 210, and B is the distance of the upper end in the face that optical axis 201 arrives light valve 210.
It should be noted that deviating the quantitative response degree of the optical axis 201 of projected picture offset projection camera lens 200.Specifically
, when offset is bigger, the distance of the optical axis 201 of projected picture offset projection camera lens 200 is bigger, so projecting into design
When as system, the projection imaging system of different offsets can be designed according to different needs.If the offset of projection lens 200
When measuring excessive, projector, image projection it is excessively high, so that the centre of screen can not be projected to, if the offset of projection lens 200
When too small, projector, image projection it is too low, so that the centre of screen can not be projected to, therefore, in actual design according to reality
Situation designs suitable offset, and projected image is allowed to project to the centre of projection screen.It is different inclined relating to how to design
The projection imaging system of shifting amount is present technology, does not do specific introduction herein.
First lens group 220 include at least one spherical lens and two non-spherical lenses, two of the first lens group 220
At least one spherical lens is provided between non-spherical lens；When image strip the first lens group of directive 220, the first lens group
The coma and astigmatism of 220 correcting image light beams, and by the second lens group of image strip directive 230 after correction；And second is saturating
The use of two non-spherical lenses in microscope group 220, reduces the use of spherical lens in projection imaging system, to reduce
The volume of projection imaging system.
Second lens group 230 includes at least one spherical lens and two non-spherical lenses, and two of the second lens group are non-
At least one spherical lens is provided between spherical lens；When image strip the second lens group of directive 230, the second lens group
230 are used for the coma and astigmatism of correcting image light beam, and by image strip directive reflecting mirror 240；And second in lens group 230
Two non-spherical lenses use, the use of the spherical lens of projection imaging system is equally decreased, thus further
Reduce the volume of projection imaging system.
Reflecting mirror 240 is used to be reflected by the image strip after the first lens group 220 and the correction of the second lens group 230
On projection screen.
Optionally, reflecting mirror 240 is non-spherical reflector (plane of incidence of non-spherical reflector is concave surface) or free form surface
Reflecting mirror.When reflecting mirror 240 is non-spherical reflector, reflecting mirror 240 is also used to the curvature of field and odd change of correcting image light beam.
Optionally, referring to fig. 2, as shown in Fig. 2, the first lens group 220 along image strip entrance propagation direction successively
First non-spherical lens 221 and the second non-spherical lens 222, the first non-spherical lens 221 and the second non-spherical lens 222 and throwing
Shadow camera lens is in same optical axis 201.
Optionally, referring to fig. 2, as shown in Fig. 2, the second lens group 230 along image strip entrance propagation direction successively
Including third non-spherical lens 231 and the 4th non-spherical lens 232, third non-spherical lens 231 and the 4th non-spherical lens 232
Same optical axis 201 is in projection lens.
In addition, influencing the first non-spherical lens 221, the second non-spherical lens 222, third non-spherical lens 231 and the 4th
The imaging factors of non-spherical lens 232 have an order of the higher order coefficient of aspherical equation, the curvature of non-spherical lens, aspherical
The circular cone coefficient of mirror and the diopter of non-spherical lens.
The order of the higher order coefficient of aspherical equation influences non-spherical lens to the edge analytic ability of imaging, when aspherical
When the order of the higher order coefficient of equation is higher, the shape that the curved surface of aspherical equation includes is more complicated, to the light of image strip
Calibration capability it is better.
Curvature is the inverse of the spherical radius of 201 part of close optical axis of non-spherical lens.The present embodiment is only to curvature
Positive and negative to be limited, the curvature for defaulting the reverse optical path direction in convex surface of non-spherical lens is positive.
Circular cone coefficient influences the shape of the curved surface of the dipped beam axis 201 of non-spherical lens, when the circular cone coefficient of non-spherical lens
When being zero, the shape of the curved surface of the dipped beam axis 201 of non-spherical lens is circle, is mainly used for correcting image beam edge light
Coma.If circular cone coefficient choose it is improper, will cause light beam deflection it is improper, lead to image blur problem.
Diopter influences non-spherical lens to the degree of deflection of light, and the bigger non-spherical lens of diopter is to image strip
Degree of deflection is bigger, is mainly used for coma of the correcting image light beam far from 201 part of primary optical axis.Default is shaped like non-spherical lens
The diopter of convex lens is positive, and the diopter of the concavees lens shaped like non-spherical lens is negative.
Specifically, the first non-spherical lens 221, the second non-spherical lens 222, third non-spherical lens 231 and the 4th are non-
Order, curvature, circular cone coefficient and the diopter of the higher order coefficient of the aspherical equation of spherical lens 232 meet respectively to be wanted as follows
It asks:
The order of the higher order coefficient of the aspherical equation of first non-spherical lens 221 is greater than or equal to preset first threshold value；
The order of the higher order coefficient of the aspherical equation of second non-spherical lens 222 is greater than or equal to default second threshold, should due to working as
When the order of the higher order coefficient of aspherical equation is higher, the shape that the curved surface of the aspherical equation includes is more complicated, to the image
The calibration capability of the light of light beam is better, but manufacture is also more difficult, and cost is higher, in order to not influence to the image strip
Correction, also not to big difficulty is caused, the order of the higher order coefficient of aspherical equation can carry out really according to the actual situation
It is fixed.Or preset first threshold value and default second threshold can be configured in conjunction with the other configurations situation of projection lens, be preset
First threshold can be equal to default second threshold, for example, the high-order for the non-spherical lens for including in projection lens in the present invention
The order of coefficient is greater than or equal to 10, for example, preset first threshold value and default second threshold are 10, alternatively, default first threshold
Value is 10 and default second threshold equal 12；
Optionally, the curvature in two faces that the first non-spherical lens 221 includes is contrary sign, to reduce the incidence of incident beam
Angle, for the first non-spherical lens 221, the face of image strip incidence is convex surface, another face is concave surface, corrects paraxial rays
Angle.The curvature in two faces of the second non-spherical lens 222 is jack per line, while two faces of the second non-spherical lens are convex
Face, spherical aberration corrector and coma.
Optionally, the circular cone coefficient of the first non-spherical lens 221 is not equal to 0, the circular cone coefficient of the second non-spherical lens 222
Equal to 0；
Optionally, the diopter of the first non-spherical lens 221 is negative, and the diopter of the second non-spherical lens 222 is negative.It is logical
The positive and negative cooperation for crossing diopter corrects light beam of the image strip far from primary optical axis, corrects to reach far from key light shaft portion
Coma.
Optionally, the order of the higher order coefficient of the aspherical equation of third non-spherical lens 231 is greater than or equal to default the
Three threshold values, the order of the higher order coefficient of the aspherical equation of the 4th non-spherical lens 232 are greater than or equal to default 4th threshold value, by
In when the order of the higher order coefficient of the aspherical equation is higher, the shape that the curved surface of the aspherical equation includes is more complicated, right
The calibration capability of the light of the image strip is better, but manufacture is also more difficult, and cost is higher, in order to not influence to the image
The correction of light beam, also not to big difficulty is caused, the order of the higher order coefficient of aspherical equation can be according to the actual situation
It is determined.Or default third threshold value and default 4th threshold value can be set in conjunction with the other configurations situation of projection lens
It sets, default 4th threshold value can be equal to by presetting third threshold value, for example, default third threshold value and default 4th threshold value are 13, or
Person, presetting third threshold value is 13 and default 4th threshold value equal 14；
Optionally, the curvature in two faces of third non-spherical lens 231 is jack per line, for third non-spherical lens 231, shadow
As light beam incidence face be concave surface, another side is convex surface, and the curvature of main aberration correction, two faces of the 4th non-spherical lens is
Contrary sign, while two faces of the 4th non-spherical lens 232 are concave surface, main aberration correction, picture becomes；
Optionally, the circular cone coefficient of third non-spherical lens 231 is equal to 0, the circular cone coefficient etc. of the 4th non-spherical lens 232
In 0；
Optionally, the diopter of third non-spherical lens 231 is positive, and the diopter of the 4th non-spherical lens 232 is positive.It is logical
The positive and negative cooperation for crossing diopter corrects light beam of the image strip far from primary optical axis, corrects to reach far from key light shaft portion
Coma.
In addition, preset first threshold value, default second threshold, default third threshold value and default 4th threshold value can be same pre-
If threshold value.
Due to non-spherical lens compared with spherical lens compared to there is better curvature, aspheric and lens are from lens centre to edge
Continual curvature changes, so that light converges to same point, substantially eliminates spherical aberration caused by spherical lens.So the
One non-spherical lens 221, the second non-spherical lens 222, third non-spherical lens 231 and the 4th non-spherical lens 232 mention significantly
The image quality of high projection lens.Specifically, the first non-spherical lens 221 and the 4th non-spherical lens 232 are for reducing coma
And astigmatism, the second non-spherical lens 222 and third non-spherical lens 231 are for improving big visual field resolution ratio.
In addition, for non-spherical lens, it is stronger to the calibration capability of aberration when the thickness of non-spherical lens is thicker.But
It is the thickness for considering to combine selection non-spherical lens in practical applications the problems such as manufacture difficulty and production cost, so that selection
Non-spherical lens have good aberration correcting capability, manufacture difficulty will not be caused big, the problems such as production cost is big.Than
Such as, the thickness range of third non-spherical lens 231 is 6 millimeters -12.5 millimeters.
Optionally, referring to fig. 2, as shown in Fig. 2, the first lens group 220 includes 4 spherical lenses, it is respectively as follows: the first spherical surface
Lens 223, the second spherical lens 224, third spherical lens 225 and the 4th spherical lens 226.
Optionally, the first non-spherical lens 221, the second non-spherical lens 222, the first spherical lens 223, the second spherical surface are saturating
Mirror 224, third spherical lens 225 and the 4th spherical lens 226 are in same optical axis 201, and mutual positional relationship can
Think position as shown in Figure 2.
Optionally, third spherical lens 225 and 226 gluing of the 4th spherical lens are an entirety, obtain the first veneer,
The refractive index of third spherical lens 225 is greater than the refractive index of the 4th spherical lens 226, and the Abbe number of third spherical lens 225 is small
In the Abbe number of the 4th spherical lens 226.
Wherein, refractive index is used to indicate optical medium to the change degree of the direction of propagation of light, when refractive index is bigger,
Optical medium is bigger to the change degree of the direction of propagation of light.So lens are to image light when the refractive index of lens is bigger
The change degree of the direction of propagation of beam is bigger.
Wherein, Abbe number is used to indicate that (degree of dispersion of light to be different frequency or face to degree of dispersion of the optical medium to light
The mixed light of color is by separated degree), Abbe number is lower, and dispersion is more severe.
Optionally, the diopter of the first spherical lens 223 is negative, the diopter of the second spherical lens 224 is negative, third ball
The diopter of face lens 225 is positive to be positive with the diopter of the 4th spherical lens 226.
Optionally, referring to fig. 2, as shown in Fig. 2, the second lens group 230 includes 7 at least one spherical lenses, it is respectively as follows:
5th spherical lens 233, the 6th spherical lens 234, the 7th spherical lens 235, the 8th spherical lens 236, the 9th spherical lens
237, the tenth spherical lens 238, the 11st spherical lens 239.
Optionally, third non-spherical lens 231, the 4th non-spherical lens 232, the 5th spherical lens 233, the 6th spherical surface are saturating
Mirror 234, the 7th spherical lens 235, the 8th spherical lens 236, the 9th spherical lens 237, the tenth spherical lens the 238, the 11st
Spherical lens 239 is in same optical axis 201, and mutual positional relationship can be position as shown in Figure 2.
Optionally, the 6th spherical lens 234 and 235 gluing of the 7th spherical lens are an entirety, obtain the second veneer,
For the refractive index of 6th spherical lens 234 less than the refractive index of the 7th spherical lens 235, the Abbe number of the 6th spherical lens 234 is small
In the Abbe number of the 7th spherical lens 235.
Optionally, the 8th spherical lens 236 and 237 gluing of the 9th spherical lens are an entirety, obtain third veneer,
The refractive index of 8th spherical lens 236 is greater than the refractive index of the 9th spherical lens 237, and the Abbe number of the 8th spherical lens 236 is big
In the Abbe number of the 9th spherical lens 237.
Optionally, the diopter of the 5th spherical lens 233 is positive, the diopter of the 6th spherical lens 234 is negative, the 7th ball
The diopter of face lens 235 is negative, the diopter of the 8th spherical lens 236 is positive, the diopter of the 9th spherical lens 237 is
Negative, the tenth spherical lens 238 diopter is positive, the diopter of the 11st spherical lens 239 is negative.
In addition, the first veneer, the second veneer and third veneer, the ball of the different spectrum for improving projection lens
Difference, and the axial chromatic aberration of projection lens, axial chromatic aberration of hanging down are corrected.Included each lens are by difference in each veneer
The material of Abbe number forms, and there are different dispersions to different spectrum for the material of different Abbe numbers, and by with Curvature match
Reach the function of correcting chromatic aberration.
Optionally, referring to fig. 2, as shown in Fig. 2, the first lens group 220 along image strip entrance propagation direction successively
It include: the first spherical lens 223, the first non-spherical lens 221, the second spherical lens 224, third spherical lens 225, the 4th ball
Face lens 226, the second non-spherical lens 222.Second lens group 230 successively includes: along the direction of image strip entrance propagation
Third non-spherical lens 231, the 5th spherical lens 233, the 6th spherical lens 234, the 7th spherical lens 235, the 8th spherical surface are saturating
Mirror 236, the 9th spherical lens 237, the tenth spherical lens 238, the 11st spherical lens 239 and the 4th non-spherical lens 232.
Optionally, 221 pairs of imagings of the first spherical lens 223 and the first non-spherical lens will not affect greatly, so
The position of first spherical lens 223 and the first non-spherical lens 221 can be interchanged.
Optionally, the first non-spherical lens 221, the second non-spherical lens 222, third non-spherical lens 231 and the 4th are non-
Spherical lens 232 is symmetric aspheres lens, due to the regular shape of symmetric aspheres lens, manufacture easy to process, so
When the first non-spherical lens 221, the second non-spherical lens 222, third non-spherical lens 231 and the 4th non-spherical lens 232 are equal
It is easy to process when for symmetric aspheres lens, reduce production cost.
Optionally, referring to fig. 2, as shown in Fig. 2, projection lens further includes aperture diaphragm 250, aperture diaphragm 250 is located at the
Between one lens group 220 and the second lens group 230, aperture diaphragm 250 and projection lens are in same optical axis 201, aperture diaphragm
250 for limiting the light passing amount of projection lens, so that the light passing amount of image strip is interior the case where being limited in most beneficial for imaging, from
And improve the effect of imaging.
Optionally, referring to fig. 2, as shown in Fig. 2, projection imaging system further include: total-reflection prism group 260 is totally reflected rib
Microscope group 260 is set between light valve 210 and vibration eyeglass 211, and total-reflection prism group 260 is used for so that from the injection of light valve 210
Image strip becomes collimated light beam, to improve the smoothness being ultimately imaged.
Optionally, referring also to Fig. 2, as shown in Fig. 2, total-reflection prism group 260 includes two glued total reflection prisms, point
It Wei not the first total reflection prism 261 and the second total reflection prism 262.The light beam come is penetrated from light-source system, directive first first is complete
Reflecting prism 261, when light beam the first total reflection prism 261 of directive, light beam is totally reflected, and by the light after being totally reflected
Beam is to light valve 210, and when light beam directive light valve 210 after being totally reflected, 210 the reflected beams of light valve simultaneously generate image light
Beam, then by the image strip of generation from 210 directive total-reflection prism group 260 of light valve, when image strip is complete from 210 directive of light valve
When reflecting prism group 260, image strip is not totally reflected, but image strip directive is directly vibrated eyeglass 211.
Since the first total reflection prism 261 is totally reflected its own light beam of directive, it is all-trans using one
Penetrating prism can reflect the light on light valve 210, without carrying out multiple reflections by multiple normal mirrors, into
And reduce the usage quantity of normal mirror, greatly reduce the volume of projection lens 200；In addition, total-reflection prism group 260
So that become being parallel to 201 uniform beam of optical axis by light beam therein, it therefore meets the demand of telecentric beam path, due to making
Obtaining the image strip that directive light valve 210 generates becomes uniformly, to also improve the quality of projected image.
Since total reflection prism has the function of projecting in parallel to the light injected in it, work as the not parallel of light valve 210
When image strip directive total-reflection prism group 260, total reflection prism 270 projects image strip in parallel, so that image
Light beam becomes uniformly, to improve the smoothness of imaging.
In addition, since total reflection prism can project the light beam injected in it from another direction, so in order to enable shadow
As light beam can include 2 total reflection ribs by 260 directive of total-reflection prism group vibration eyeglass 211, total-reflection prism group 260
Mirror.
Optionally, total reflection prism 270 also may include 4,6 or other a total reflection prisms.
In addition, the range of the ratio of lens group length and lens group reflecting mirror distance are as follows: 0.65-0.70, lens group length
For the total length of the first lens group 220 and the second lens group 230, lens group reflecting mirror distance is the second lens group 230 close to anti-
One end of mirror 240 is penetrated to the length of reflecting mirror 240.
In addition, the range of the ratio of the first focal length and the second focal length be 5-9, the first focal length be the first lens group 220 etc.
Focal length is imitated, the second focal length is the equivalent focal length of projection lens (the first lens group 220, the second lens group 230 and reflecting mirror 240).
In addition, the ratio range of third focal length and the second focal length be 7-100, third focal length be the second lens group 230 etc.
Imitate focal length.
The ratio range of 4th focal length and the second focal length is 5-15, and the 4th focal length is the focal length of reflecting mirror 240.
By the limitation to each equivalent focal length, so that between the first lens group 220, the second lens group 230 and reflecting mirror 240
It cooperates, achievees the effect that improve projection lens to image strip calibration capability.
In addition, the back work distance of projection imaging system reserves enough from being greater than 36 millimeters to vibrate eyeglass 211 for placement
Space.Wherein, (first lens enter first lens of the back work distance from light valve face and projection lens for light valve 210
The distance between smooth surface).
In addition, it is necessary to which explanation reserves enough for vibration eyeglass 211 first in specifically design projection imaging system
Space, that is, reserve sufficiently long back work distance from but since the subtended angle of image strip is constant, so longer back work distance
Defection leads to optical axis of the image strip further away from projection lens, so will cause larger aberration, therefore states projection lens in design
It when head, can also consider since long back work distance is from bring aberration, and projection lens correction is set due to long back work distance
From bring aberration.
In addition, back work distance is limited from being 0.2-0.35 with the range of the ratio with a distance from lens group reflecting mirror for further
Determine back work distance from length to avoid back work distance from too long, cause aberration too big, so as to cause being arranged to for projection lens
This excessively high problem.
In addition, it is necessary to explanation, projection lens is ultra-short focus projection lens, the range of the projection ratio of projection imaging system
It is 0.2-0.3.The range of the projection ratio of projection lens is 0.2-0.3, to achieve the purpose that ultrashort out-of-focus projection.It is real in another example
In example, the projection of projection imaging system is compared for 0.24-0.25.
In addition, referring to fig. 4, Fig. 4 is the light according to a kind of another projection imaging system imaging shown shown in illustrative embodiments
The schematic diagram on road.As shown in figure 4, the image presented on light valve 210 is formed image strip, shadow when light valve 210 is by illumination
After passing through total-reflection prism group 260 as light beam, image strip becomes uniformly, and then image strip is improved by vibration eyeglass 211
The resolution ratio of imaging, then image strip enters the first lens group 220, and the first lens group 220 has focusing light effect, when image light
After beam passes through the first lens group 220, the light of image strip polymerize to a certain extent, when image strip is penetrated from the first lens group 220
After out, image strip entrance aperture diaphragm 250 after polymerization, aperture diaphragm 250 is used to control the light passing amount of projection lens, so that
When image strip projects the light passing amount for obtaining being suitble to projection lens from aperture diaphragm 250, subsequently into the second lens group 230, the
Two lens groups 230 have the function of light splitting, and after image strip enters the second lens group 230, image strip is separated, and from second
Lens group projects, and carries out first time imaging, and after imaging projects reflecting mirror 240 for the first time, reflecting mirror 240 is anti-by image strip
It is shot out, carries out second on the projection screen and be imaged, and shown second and be imaged by projection screen.
In addition, Fig. 5 is shown according to the another use for showing a kind of projection imaging system shown in illustrative embodiments referring to Fig. 5
It is intended to.As shown in figure 5, the reflecting mirror 240 of projection lens reflects first time imaging, and carries out second and is imaged, it will be second
Imaging is reflected on projection screen 280, is shown and is imaged by projection screen 280.
In addition, Fig. 6 is an imaging schematic diagram shown according to an exemplary embodiment referring to Fig. 6.As shown in fig. 6, Fig. 6
Middle cross spider (+) is pre-imaging position, and cross (x) is actual imaging position, then cross is got over cross spider intersection point registration in Fig. 6
Height illustrates that the distortion of imaging is more unobvious.It will be appreciated from fig. 6 that imaging cross and cross spider intersection point registration are higher, and therefore, projection lens
The degree of distortion of the imaging of head is lower.
In addition, the modulation tansfer function of projection lens provided by the invention be greater than 60%, resolution ratio up to 93 lines it is right/millisecond,
Effective focal length is -3.38 or -3.47, and offset 142%-150%, projection image is having a size of 80-120.
In addition, projection imaging system is unable to satisfy the projection demand of the corresponding image strip of high-resolution 4K image now, and
The projection lens for including in projection imaging system provided in an embodiment of the present invention passes through each spherical lens and aspheric Lens
Cooperation, projection lens can parse the corresponding image strip of image of 4K pixel, allows projection screen that more high definition is presented
Image, promoted user experience.
In addition, projection lens can also include the lens group of the third lens group, the 4th lens group or more, by more
More lens groups carries out multiple correction to image strip, is projected out clearer imaging.
In conclusion the projection imaging system provided in the embodiment of the present invention, including light valve, vibration eyeglass and projection lens
Head.Vibration eyeglass is overlapped the corresponding image strip of adjacent two frames projected image by vibrating eyeglass not exclusively, due to shadow
As light beam is not exclusively overlapped, so that the image strip of the same pixel of directive increases, and then improves the resolution ratio of imaging, and due to
The vibration of eyeglass is vibrated so that the corresponding image strip of adjacent two frames projected image is slightly misaligned, so that the mistake between pixel
Degree is more smooth, to improve the fine and smooth sense of imaging, and then improves image quality；In addition, projection provided in an embodiment of the present invention
Camera lens includes at least four non-spherical lenses, and being compared due to non-spherical lens has better correction to image strip with spherical lens
Ability, so projection lens includes the quantity that can greatly reduce the spherical lens for including after non-spherical lens in projection lens,
The structure of projection lens is not only simplified, the resolution ratio of projection lens is also substantially increased, is further conducive to realize high-resolution
The projection of projected image.
Those skilled in the art will readily occur to other realities of the invention after considering the invention of specification and practice here
Apply scheme.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or suitable
The variation of answering property follows general principle of the invention and including the undocumented common knowledge in the art of the present invention or used
Use technological means.The description and examples are only to be considered as illustrative, and true scope of the invention is referred to by following claim
Out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (9)
1. a kind of projection imaging system, which is characterized in that the optical path that the projection imaging system is emitted along image strip is successively
Including light valve, vibration eyeglass and projection lens, the center-biased of the light valve is in the optical axis of the projection lens；
The light valve is used to modulate the light beam come in projector from light-source system propagation, so that the light valve generates image light
Beam, and eyeglass will be vibrated described in the image strip directive；
Described in passing through respectively when the corresponding image strip of first frame projected image and the corresponding image strip of the second frame projected image
When vibrating eyeglass, the vibration eyeglass is in different location, so that the corresponding image strip of the second frame projected image and institute
It states the corresponding image strip of first frame projected image to be not exclusively overlapped, wherein the first frame projected image and described
Two frame projected images are adjacent two frames projected image, and the first frame projected image and the second frame projected image are by same frame
Picture breakdown obtains,
And by projection lens described in the corresponding image strip of the adjacent two frames projected image successively directive, the projected image is
The image that the image strip is presented on the projection screen after the projection imaging system；
When the image strip is from projection lens described in the vibration eyeglass directive, the projection lens is for correcting, amplifying
The image strip, and correction, the amplified image strip are projected on the projection screen.
2. projection imaging system according to claim 1, which is characterized in that the light valve biases the offset of the optical axis
Meet: 1.2 < A/B < 1.5, wherein the A is the height of the light valve, and the B is the optical axis to the upper end of the light valve
Distance.
3. projection imaging system according to claim 1, which is characterized in that the projection lens is along image strip incidence
The direction of propagation successively includes: the first lens group, the second lens group and reflecting mirror, first lens group, second lens
Group and the reflecting mirror are in same optical axis；
First lens group and second lens group include at least one spherical lens and two non-spherical lenses, described
At least one described spherical lens is provided between two non-spherical lenses；
The reflecting mirror will be reflected by the image strip after first lens group and second lens group correction
On the projection screen.
4. projection imaging system according to claim 3, which is characterized in that the back work distance of the projection imaging system from
It is 0.2-0.35 with the range of the ratio of lens group reflecting mirror distance, the back work distance is from for light valve face to the projection lens
The distance between first lens, the lens group reflecting mirror distance is second lens group close to the one of the reflecting mirror
Hold the distance between described reflecting mirror.
5. projection imaging system according to claim 3, which is characterized in that first lens group is along the image light
The direction of beam entrance propagation successively includes the first non-spherical lens and the second non-spherical lens, first non-spherical lens and institute
It states the second non-spherical lens and the projection lens is in same optical axis；
The order of the higher order coefficient of the aspherical equation of first non-spherical lens is greater than or equal to preset first threshold value, described
The order of the higher order coefficient of the aspherical equation of second non-spherical lens is greater than or equal to default second threshold.
6. projection imaging system according to claim 3, which is characterized in that second lens group is along the image light
The direction of beam entrance propagation successively includes third non-spherical lens and the 4th non-spherical lens, third non-spherical lens and the 4th non-
Spherical lens and the projection lens are in same optical axis；
The order of the higher order coefficient of the aspherical equation of the third non-spherical lens is greater than or equal to default third threshold value, described
The order of the higher order coefficient of the aspherical equation of 4th non-spherical lens is greater than or equal to default 4th threshold value.
7. projection imaging system according to claim 3, which is characterized in that
First lens group includes two non-spherical lenses and four spherical lenses, and first lens group is along the image
The direction of light beam entrance propagation successively includes that the first non-spherical lens, the first spherical lens, the second spherical lens, third spherical surface are saturating
Mirror, the 4th spherical lens and the second non-spherical lens；
Alternatively, first lens group successively includes that first spherical surface is saturating along the direction of the image strip entrance propagation
Mirror, first non-spherical lens, second spherical lens, the third spherical lens, the 4th spherical lens and institute
State the second non-spherical lens；Lens in first lens group are in same optical axis.
8. projection imaging system according to claim 3, which is characterized in that
Second lens group includes two non-spherical lenses and seven spherical lenses, and second lens group is along the image
The direction of light beam entrance propagation successively includes that third non-spherical lens, the 5th spherical lens, the 6th spherical lens, the 7th spherical surface are saturating
Mirror, the 8th spherical lens, the 9th spherical lens, the tenth spherical lens, the 11st spherical lens and the 4th non-spherical lens.
9. projection imaging system according to claim 3, which is characterized in that the projection lens further includes aperture diaphragm,
The aperture diaphragm is between first lens group and second lens group, the aperture diaphragm and the projection lens
In same optical axis, the aperture diaphragm is used to limit the light passing amount of the projection lens.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696733A (en) * | 2017-02-22 | 2018-10-23 | 深圳市光峰光电技术有限公司 | Projected picture antidote and device |
| TWM554571U (en) | 2017-09-13 | 2018-01-21 | 孔建平 | Reflective type wide angle lens |
| CN107817593B (en) * | 2017-12-01 | 2024-05-10 | 上海理鑫光学科技有限公司 | Ultra-short focal projection lens |
| CN109946907A (en) * | 2017-12-20 | 2019-06-28 | 中强光电股份有限公司 | Projection arrangement |
| CN108121141A (en) * | 2018-02-07 | 2018-06-05 | 全普光电科技(上海)有限公司 | A kind of optical projection system |
| CN110346895B (en) * | 2018-04-02 | 2021-07-23 | 中强光电股份有限公司 | Fixed focus lens |
| WO2019214317A1 (en) * | 2018-05-08 | 2019-11-14 | 青岛海信激光显示股份有限公司 | Projection device |
| CN111464801B (en) * | 2019-01-18 | 2021-07-16 | 广景视睿科技（深圳）有限公司 | Galvanometer adjusting device, system and method and projector |
| CN109884853A (en) * | 2019-04-16 | 2019-06-14 | 北京镭创高科光电科技有限公司 | Optical projection system and method |
| CN110376715B (en) * | 2019-07-18 | 2024-03-26 | 广东奥普特科技股份有限公司 | High-resolution prime lens |
| CN113641064A (en) * | 2021-10-14 | 2021-11-12 | 泉州市锐驰智能科技有限公司 | Reflective wide-angle lens |
| CN114236824B (en) * | 2021-11-29 | 2022-10-18 | 歌尔光学科技有限公司 | Projection system |
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Effective date of registration: 20200817 Address after: 266555 Qian WAN port road, Huangdao District, Qingdao, Shandong Province, No. 218 Patentee after: Qingdao Hisense Laser Display Co.,Ltd. Address before: Donghai West Road 266071 Shandong city of Qingdao province No. 17 Patentee before: HISENSE Co.,Ltd. |
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Application publication date: 20161116 Assignee: JIANGSU INOVEL DISPLAY TECHNOLOGY Co.,Ltd. Assignor: Qingdao Hisense Laser Display Co.,Ltd. Contract record no.: X2020980007242 Denomination of invention: Projection imaging system Granted publication date: 20190409 License type: Common License Record date: 20201027 |
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Denomination of invention: Projection imaging system Effective date of registration: 20201028 Granted publication date: 20190409 Pledgee: Yipu Photoelectric (Tianjin) Co.,Ltd. Pledgor: Qingdao Hisense Laser Display Co.,Ltd. Registration number: Y2020980007264 |