CN207623619U - Based on wavefront coded hyperfocal distance imaging system - Google Patents
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Abstract
The utility model belongs to optical field, it is related to a kind of based on wavefront coded hyperfocal distance imaging system, including wavefront coded imaging lens, 1/1.8 inch of image detector and codec processing unit, wavefront coded imaging lens include the first eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th eyeglass and the 5th eyeglass；First eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th eyeglass, the 5th eyeglass, 1/1.8 inch of image detector and codec processing unit are successively set in same light path, the parameter of wavefront coded imaging lens, especially the first eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th eyeglass and the 5th eyeglass is defined simultaneously.The utility model provide it is a kind of can be realized simultaneously object lens of large relative aperture, hyperfocal distance and larger field based on wavefront coded hyperfocal distance imaging system.
Description
Technical field
The utility model belongs to optical field, is related to a kind of depth field imaging system, more particularly to a kind of based on wavefront coded
Hyperfocal distance imaging system.
Background technology
The depth of field of expansion optical imaging system is all the hot spot of academia's research all the time, from mid-term the 1980s
Start, although panoramic method is proposed for depth of field extension, until the Dowski of Univ Colorado-Boulder USA is rich
After scholar and Cathey professors propose wavefront coded concept in nineteen ninety-five, field depth extending just has breakthrough truly.
By taking one dimensional optical system as an example, defocus optical transfer function OTF (Optical Transfer Function) can
It is obtained with auto-correlation computation by generalized pupil function, as follows：
Wherein, u and x is normalized spatial frequency and aperture plane lateral coordinates respectively；W20It is maximum defocus wave aberration
Coefficient；K is wave number；And f then represents phase-plate general expression.
For traditional imaging systems, the f items in above formula are not present, therefore can be readily available the specific of defocus OTF
Expression formula is：
It can be seen that when system is not introduced into phase-plate, OTF is very sensitive to defocus, and can be in frequency sky
Between periodically there is zero, to cause irreversible information loss.But it is once that doctor E.R.Dowski institute is practical new
Cube phase-plate (the f (x)=α x of type3) be introduced on the entrance pupil face of optical system after, just by static phase approximation method
An entirely different defocus OTF can be obtained, it is as follows：
It is clear that the mould of defocus OTF, i.e. MTF are unrelated with defocus wave aberration coefficient at this time, that is to say, that cube
Phase mask plate can make system MTF (Modulation Transfer Function) insensitive to defocus；Although the phase of OTF
Bit position and degree of blur W20It is related, as long as but modulation factor α increase, to W20Dependency degree will significantly reduce.Simultaneously
Most importantly, after being added to phase mask plate, MTF only has certain journey within effective frequency range in amplitude
Zero or nearly zero may be not present in the decline of degree, i.e., when defocus occurs in system, the information beyond primal system field depth is not
There is loss, can effectively be restored by digital image restoration algorithm later.Simultaneously as thang-kng of the phase-plate to system
Amount and resolution ratio will not all impact, so it is wavefront coded be one kind differ substantially from reduced bore method, central obscuration method or
The novel big depth field imaging method of apodization.
Due to the depth of field of optical system and square being inversely proportional for relative aperture --- the more big then depth of field of relative aperture is more shallow, and
Wavefront coding technology has the ability for substantially expanding the depth of field, so it is highly suitable to be applied for object lens of large relative aperture system, at this point for
With the relevant aberration in aperture such as spherical aberration and aberration etc. can also synchronize be inhibited.At the same time, the substantially expansion of the depth of field also makes
Wave-front coding imaging technology can pair aberration such as coma, astigmatism, the curvature of field related with defocus etc. play inhibition.Due to this
A little aberrations and visual field size are closely related, so carrying out inhibiting to also mean that there is permission optical system bigger to regard to it
.Therefore, wave-front coding imaging technology is especially advantageous for realizing object lens of large relative aperture and the design of big visual field.
The design and optimization difficulty of optical system can be significantly increased in the increase of relative aperture and visual field, and traditional design method is not
Obtain the well-corrected that large visual field optical system off-axis aberration is realized without using more eyeglasses or using aspherical mirror chip technology.
However, for wave-front coding imaging technology, it is allowed for component number not to be excessively increased and all using spherical mirror
Under conditions of piece realize visual field and relative aperture extension, so as to it is lower design and development cost take into account big visual field,
Object lens of large relative aperture and the big depth of field.
Utility model content
In order to solve the above technical problems in background technology, the utility model provides one kind and can be realized simultaneously
Object lens of large relative aperture, hyperfocal distance and larger field based on wavefront coded hyperfocal distance imaging system.
To achieve the goals above, the utility model adopts the following technical solution：
One kind being based on wavefront coded hyperfocal distance imaging system, it is characterised in that：Including wavefront coded imaging lens, 1/
1.8 inches of image detectors and codec processing unit, the wavefront coded imaging lens include the first eyeglass, the second eyeglass,
Phase mask plate, third eyeglass, the 4th eyeglass and the 5th eyeglass；First eyeglass, the second eyeglass, phase mask plate,
Three eyeglasses, the 4th eyeglass, the 5th eyeglass, 1/1.8 inch of image detector and codec processing unit are successively set on same light
On the road；
First eyeglass, the second eyeglass, third eyeglass, the 4th eyeglass and the 5th eyeglass are spherical lenses；
The radius of curvature of first lens front surface is 26.75mm, and thang-kng semiaperture is 9.7553mm；First mirror
The radius of curvature of piece rear surface is 73.2mm, and thang-kng semiaperture is 9.3811mm；First lens front surface and the first eyeglass
The distance between rear surface is 2.5681mm；
Second eyeglass is double cemented doublets；The radius of curvature of second lens front surface is 14.689mm, thang-kng
Semiaperture is 7.0391mm；The radius of curvature of the second eyeglass median surface is -101.62mm, and thang-kng semiaperture is
6.2167mm；The radius of curvature of second lens posterior surface is 9.3760mm, and thang-kng semiaperture is 4.7580mm；Described second
The distance between lens front surface and median surface are 3.8mm, and the distance between the second eyeglass median surface and rear surface are
1.5562mm；The rear surface of first eyeglass and the distance between the front surface of the second eyeglass are 4.7939mm；
The front surface of the phase mask plate is diaphragm face, and rear surface is plane；The phase mask plate front surface is led to
Light semiaperture is 3.2057mm；The thang-kng semiaperture of the phase mask plate rear surface is 4.0978mm；The phase mask plate
The distance between a front surface and a rear surface is 5mm；Between the rear surface and phase mask plate front surface of second eyeglass away from
From being 5.0169mm；
The double cemented doublets of the third eyeglass；The radius of curvature of the third lens front surface is -9.376mm, thang-kng half
Aperture is 4.2815mm；The radius of curvature of the third eyeglass median surface is 101.62mm, and thang-kng semiaperture is 6.0116mm；
The radius of curvature of the third lens posterior surface is -14.689mm, and thang-kng semiaperture is 6.4246mm；Table before the third eyeglass
The distance between face and median surface are 3.4384mm, and the distance between the third eyeglass median surface and rear surface are
2.8661mm；The distance between the phase mask plate rear surface and third lens front surface are 1.6762mm；
The 4th lens front surface radius of curvature is -73.2mm, and thang-kng semiaperture is 6.8136mm；4th eyeglass
Rear surface radius of curvature is -26.75mm, and thang-kng semiaperture is 7.0273mm；Before the third lens posterior surface and the 4th eyeglass
The distance between surface is 0.4629mm；The distance between 4th lens front surface and the 4th lens posterior surface are
1.8261mm；
The radius of curvature of 5th lens front surface is 120.23mm, and thang-kng semiaperture is 7.1664mm；Described 5th
The radius of curvature of lens posterior surface is -66.37mm, and thang-kng semiaperture is 7.3062mm；4th lens posterior surface and the 5th
The distance between lens front surface is 0.1mm；The distance between 5th lens front surface and the 5th lens posterior surface are
3.8mm；
The distance between the rear surface of 5th eyeglass and 1/1.8 inch of image detector are 22.216mm.
The 2D mask functional forms of above-mentioned phase mask plate are：
x,y∈[-3.2057,3.2057]
Wherein：
α characterizes the phase-modulation intensity of rectangular phase mask plate three times, and the α values are 0.01mm；
X and y is normalized aperture coordinate, unit mm, x the and y value ranges be [- 3.2057,
3.2057]。
The focal length of above-mentioned wavefront coded imaging lens is 35mm, and relative aperture is 1/3.5, and full filed angle is 30 °, work spectrum
Section 480um~680um.
The utility model has the advantages that：
It is a kind of based on wavefront coded hyperfocal distance imaging system, including wavefront coded imaging lens that the utility model carries work(
Head, 1/1.8 inch of image detector and codec processing unit, wavefront coded imaging lens include the first eyeglass, the second mirror
Piece, phase mask plate, third eyeglass, the 4th eyeglass and the 5th eyeglass；First eyeglass, the second eyeglass, phase mask plate, third
Eyeglass, the 4th eyeglass, the 5th eyeglass, 1/1.8 inch of image detector and codec processing unit are successively set on same light path
On, while to wavefront coded imaging lens, especially the first eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th mirror
The parameter of piece and the 5th eyeglass is defined.It is provided by the utility model can based on wavefront coded hyperfocal distance imaging system
To 2m to infinity blur-free imaging, depth of focus and does not use with equivalent specifications parameter but wavefront coding technology up to 0.62mm
Conventional optical image system is compared, and it is more than 40 times that depth of focus, which expands multiple,；Under conditions of depth of focus is expanded more than 40 times, filtering decoding
Picture quality afterwards is close to diffraction limited；Defocus is constant to be can be achieved to exempt from fast imaging of focusing, and object lens of large relative aperture then allows to be applied to
Low-illumination scene is imaged；The utility model proposes the hyperfocal distance imaging system using wavefront coding technology allow to carry out exempting to adjust
Burnt fast imaging is very suitable for motive target imaging, and the larger highly sensitive cmos detector of relative aperture collocation can
To realize the purpose in the scene blur-free imaging compared with low-light (level).
Description of the drawings
Fig. 1 is the principle schematic provided by the utility model based on wavefront coded hyperfocal distance imaging system；
Fig. 2 is the 3D model schematics provided by the utility model based on wavefront coded hyperfocal distance imaging system；
Fig. 3 is provided by the utility model based on phase mask plate used by wavefront coded hyperfocal distance imaging system
3D phase distributions；
Fig. 4 be it is provided by the utility model based on wavefront coded hyperfocal distance imaging system under different image-forming ranges
MTF schemes；Wherein, all visual field points needed for MTF evaluations are covered corresponding to two width figures of each image-forming range.
Fig. 5 is that have equivalent specifications parameter but do not use the conventional optical system of wavefront coded imaging in different image-forming ranges
Under MTF figure；Wherein, all visual field points needed for MTF evaluations are covered corresponding to two width figures of each image-forming range.
Fig. 6 is simulation imaging effect contrast figure；
Wherein：
1- targets；The wavefront coded imaging lens of 2-；The first eyeglasses of 21-；The second eyeglasses of 22-；23- phase mask plates；24-
Three eyeglasses；The 4th eyeglasses of 25-；The 5th eyeglasses of 26-；3- image detectors；4- codec processing units.
Specific implementation mode
Referring to Fig. 1 and Fig. 2, the utility model provides one kind and being based on wavefront coded hyperfocal distance imaging system, can
Realize that object lens of large relative aperture, hyperfocal distance and larger visual field, including wavefront coded imaging lens, 1/1.8 inch of image are visited simultaneously
Survey device and codec processing unit, wavefront coded imaging lens include the first eyeglass 21, the second eyeglass 22, phase mask plate 23,
Third eyeglass 24, the 4th eyeglass 25 and the 5th eyeglass 26；First eyeglass 21, the second eyeglass 22, phase mask plate 23, third
Eyeglass 24, the 4th eyeglass 25, the 5th eyeglass 26 and 1/1.8 inch of image detector are successively set in same light path；The wave
Preceding coded imaging systems use the asymmetric double Gaussian structures with circular aperture, wherein 21 front and rear surfaces curvature of the first eyeglass half
Diameter and 25 front and rear surfaces radius of curvature of the 4th eyeglass opposite number each other, middle rear surface radius of curvature and third before the second eyeglass 22
Opposite number, the 5th eyeglass 26 are used to increase visual field middle rear surface radius of curvature each other before eyeglass 24.In addition, removing phase mask plate 23
Except, remaining all eyeglass is spherical lens.
The radius of curvature of the front surface of first eyeglass 21 is 26.75mm, and the thang-kng semiaperture of 21 front surface of the first eyeglass is
9.7553mm；The radius of curvature of the rear surface of first eyeglass 21 is 73.2mm, and the thang-kng semiaperture of 21 rear surface of the first eyeglass is
9.3811mm；The distance between the rear surface of the front surface of first eyeglass 21 and the first eyeglass 21, the i.e. center of the first eyeglass 21
Thickness is 2.5681mm；
Second eyeglass 22 is double cemented doublets.Wherein, front surface radius of curvature is 14.689mm, front surface thang-kng semiaperture
For 7.0391mm；The radius of curvature of median surface is -101.62mm, and the thang-kng semiaperture of median surface is 6.2167mm；Rear surface is bent
Rate radius is 9.3760mm, and rear surface thang-kng semiaperture is 4.7580mm；The distance between front surface and median surface are 3.8mm,
The distance between median surface and rear surface are 1.5562mm；Between the rear surface of first eyeglass 21 and the front surface of the second eyeglass 22
Distance, i.e., the distance between the first eyeglass 21 and the second eyeglass 22 be 4.7939mm；
The front surface of phase mask plate 23 is diaphragm face, and the thang-kng semiaperture of front surface is 3.2057mm；Phase mask plate
23 rear surfaces are plane, and the thang-kng semiaperture of rear surface is 4.0978mm；Between a front surface and a rear surface of phase mask plate 23
Distance, i.e. the thickness of phase mask plate 23 is 5mm；Between the rear surface and the front surface of phase mask plate 23 of second eyeglass 22
Distance, i.e., the distance between the second eyeglass 22 and phase mask plate 23 are 5.0169mm；
Third eyeglass 24 is equally double cemented doublets.Wherein, front surface radius of curvature is -9.376mm, front surface thang-kng half
Aperture is 4.2815mm；The radius of curvature of median surface is 101.62mm, and the thang-kng semiaperture of median surface is 6.0116mm；Rear surface
Radius of curvature is -14.689mm, and rear surface thang-kng semiaperture is 6.4246mm；The distance between front surface and median surface are
3.4384mm, the distance between median surface and rear surface are 2.8661mm；The rear surface of phase mask plate 23 and third eyeglass 24
The distance between front surface, i.e. the distance between phase mask plate 23 and third eyeglass 24 is 1.6762mm；
The front surface radius of curvature of 4th eyeglass 25 is -73.2mm, and the front surface thang-kng semiaperture of the 4th eyeglass 25 is
6.8136mm；The rear surface radius of curvature of 4th eyeglass 25 is -26.75mm, and the rear surface thang-kng semiaperture of the 4th eyeglass 25 is
7.0273mm；The distance between the front surface of the rear surface of third eyeglass 24 and the 4th eyeglass 25, i.e. third eyeglass 24 and the 4th
The distance between eyeglass 25 is 0.4629mm；The distance between the rear surface of the front surface and the 4th eyeglass 25 of 4th eyeglass 25,
That is the center thickness of the 4th eyeglass 25 is 1.8261mm；
The front surface radius of curvature of 5th eyeglass 26 is 120.23mm, and the front surface thang-kng semiaperture of the 5th eyeglass 26 is
7.1664mm；The rear surface radius of curvature of 5th eyeglass 26 is -66.37mm, and the rear surface thang-kng semiaperture of the 5th eyeglass 26 is
7.3062mm；The distance between the front surface of the rear surface and the 5th eyeglass 26 of 4th eyeglass 25, i.e. the 4th eyeglass 25 and the 5th
The distance between eyeglass 26 is 0.1mm；The distance between the rear surface of the front surface and the 5th eyeglass 26 of 5th eyeglass 26, i.e.,
The center thickness of five eyeglasses 26 is 3.8mm；
The distance between the rear surface of 5th eyeglass 26 and 1/1.8 inch of image detector are 22.216mm.
Wherein, phase mask plate 23 can be expressed as using classical cube coding mode, 2D mask functional forms：
x,y∈[-3.2057,3.2057]
Wherein：
α characterizes the phase-modulation intensity of rectangular phase mask plate 23 three times, and α values are 0.01mm；
X and y is normalized aperture coordinate, and unit mm, x and y value range is [- 3.2057,3.2057].
The focal length of the wavefront coded imaging lens is 35mm, and relative aperture reaches 1/3.5, and full filed angle is 30 °, work spectrum
Section 480um~680um, can be to 2m to infinity blur-free imaging, and depth of focus is up to 0.62mm, and with equivalent specifications parameter but not
It is compared using the conventional optical image system of wavefront coding technology, it is more than 40 times that depth of focus, which expands multiple,.The hyperfocal distance wavefront is compiled
Code imaging system depth of focus expand multiple be more than 40 times under conditions of, filter decoded picture quality still close to diffraction by
Limit.
With reference to figure 1, in the system that the utility model is proposed, after imageable target 1 is by wavefront coded imaging lens 2,
Fuzzy intermediary image is formed on 1/1.8 inch of image detector 3, then codec processing unit 4 carries out deconvolution processing, most
The big depth of field clear image of focus is obtained eventually.
The structure of wavefront coded imaging lens 2 is as shown in Fig. 2, the utility model starting point is pair with double cemented doublets
Claim double gauss structure, one piece of lens is further added by by face before the detectors to realize the extension of design visual field.Wherein, phase mask
Plate 23 is located at aperture diaphragm, by realizing that the insensitive depth of field of defocus is opened up using phase code rectangular three times in its front surface
The requirement of exhibition.As shown in figure 3, giving the phase distribution feelings of the cube phase mask plate 23 employed in the utility model
Condition.
As previously mentioned, if not using wavefront coding technology, in order to realize larger relative aperture and larger visual field, just
Have to using more elements even with aspherical optical element carry out aberration balancing, in this way since will certainly increase camera lens
Development and testing cost.Fortunately, wavefront coding technology has two big characteristics, it is allowed to take into account larger relative opening in design
Diameter and larger field.Firstly, since the depth of field of optical imaging system and square being inversely proportional for relative aperture, so wavefront coded logical
Cross the relative aperture for inhibiting defocus to allow for optical system that there is bigger.Secondly, wavefront coding technology is realizing that defocus is constant
Meanwhile can also synchronize inhibition aberration related with defocus, and some are related to aperture for these aberrations, other then with visual field
Correlation, so, defocus is carried out to inhibit to also mean that the visual field for allowing optical system that there is bigger.The utility model is exactly base
In the These characteristics of wave-front coding imaging technology, it is proposed that hyperfocal distance imaging system as depicted in figs. 1 and 2.In the system
In, other than the coded faces of phase mask plate 23 need using the processing of five degree of freedom Free-Form Surface Machining equipment, other are all
Eyeglass is all spherical lens, and common process can be completed with extremely low cost.
With reference to figure 2, the imaging light that target scene is sent out has carrying after wavefront coded imaging lens
The depth information of scene different location be encoded, the thing followed is system to the insensitive of defocus, as shown in figure 4, providing
The hyperfocal distance imaging system that the utility model is proposed is corresponded at image-forming range 2m (a), 10m (b) and infinity (c)
MTF (wherein, abscissa represents the spatial frequency that characterize with every millimeter of demand pairs, and ordinate then represents the MTF after normalizing
Amplitude).It can be seen that the MTF corresponding to different defocusing amounts, different visual fields and different wave length all has fabulous consistency.
Thus the effect of field depth extending is demonstrated.Correspondingly, Fig. 5 gives MTF when equivalent specifications parameter does not use wavefront coding technology
The case where changing with image-forming range and changing.It is clear that if not using wavefront coding technology, conventional optical system can not be real
Show 2m to infinite distance imaging.As previously mentioned, the utility model proposes hyperfocal distance imaging system, relative aperture 1/3.5,
It is about so 14.4um according to depth of focus calculation formula system depth of focus.However according to Gauss formula, when focal length for 35mm when and
When image-forming range changes to infinity from 2m, focal plane will deviate 0.623mm, about the 43.26 of depth of focus times.That is, wavefront
The depth of focus of conventional optical system can be expanded 43.26 times by coding techniques.As shown in Figure 4, although the mtf value after coding is less than
Value before coding, but it is not in zero there are defocusing amount, therefore image detail information will not be caused
It loses.It is that the fuzzy image of uniformity is presented in a width on image detector, it is decoded with codec processing unit, will be
The mtf value of system is promoted to close to diffraction limited, to recover sharp keen clearly image.
Fig. 6 give the utility model proposes hyperfocal distance imaging system and equivalent parameters conventional optical system imaging
Effect emulation compares.Wherein (a) represents the normal optical system for not using wave-front coding imaging technology with equivalent specifications parameter but
Simulation imaging effect of the system under different image-forming ranges；(b) then represent the utility model proposes hyperfocal distance it is wavefront coded at
As simulation imaging effect of the system under different image-forming ranges.It can be seen that conventional optical image system occurs in image-forming range
When great variety, due to the rapid decrease of MTF amplitudes, image becomes increasingly to obscure so that details can not be differentiated.And for adopting
For the hyperfocal distance imaging system of wavefront coding technology, no matter image-forming range is how many, the fog-level of intermediate image
It is all almost the same, diffraction limited state can be restored to after decoding.Especially in severe defocus, conventional optical system institute
The image of acquisition is very fuzzy, and picture quality still can be close to diffraction limited state, thus after applying coded imaging technology
Demonstrate the ability of the hyperfocal distance imaging system based on wavefront coding technology.
To sum up, the utility model proposes the hyperfocal distance imaging system using wavefront coding technology allow to carry out exempting to focus
Fast imaging, is very suitable for motive target imaging, and the larger highly sensitive cmos detector of relative aperture collocation
Realize the purpose in the scene blur-free imaging compared with low-light (level).
Claims (3)
1. one kind being based on wavefront coded hyperfocal distance imaging system, it is characterised in that：It is described based on wavefront coded hyperfocal distance at
As system includes wavefront coded imaging lens, 1/1.8 inch of image detector and codec processing unit, it is described it is wavefront coded at
As camera lens includes the first eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th eyeglass and the 5th eyeglass；Described first
Eyeglass, the second eyeglass, phase mask plate, third eyeglass, the 4th eyeglass, the 5th eyeglass, 1/1.8 inch of image detector and solution
Code processing unit is successively set in same light path；
First eyeglass, the second eyeglass, third eyeglass, the 4th eyeglass and the 5th eyeglass are spherical lenses；
The radius of curvature of first lens front surface is 26.75mm, and thang-kng semiaperture is 9.7553mm；After first eyeglass
The radius of curvature on surface is 73.2mm, and thang-kng semiaperture is 9.3811mm；First lens front surface and table after the first eyeglass
The distance between face is 2.5681mm；
Second eyeglass is double cemented doublets；The radius of curvature of second lens front surface is 14.689mm, thang-kng half bore
Diameter is 7.0391mm；The radius of curvature of the second eyeglass median surface is -101.62mm, and thang-kng semiaperture is 6.2167mm；Institute
The radius of curvature for stating the second lens posterior surface is 9.3760mm, and thang-kng semiaperture is 4.7580mm；Second lens front surface
The distance between median surface is 3.8mm, and the distance between the second eyeglass median surface and rear surface are 1.5562mm；It is described
The rear surface of first eyeglass and the distance between the front surface of the second eyeglass are 4.7939mm；
The front surface of the phase mask plate is diaphragm face, and rear surface is plane；The thang-kng of the phase mask plate front surface half
Aperture is 3.2057mm；The thang-kng semiaperture of the phase mask plate rear surface is 4.0978mm；Table before the phase mask plate
The distance between face and rear surface are 5mm；The distance between the rear surface of second eyeglass and phase mask plate front surface are
5.0169mm；
The double cemented doublets of the third eyeglass；The radius of curvature of the third lens front surface is -9.376mm, thang-kng semiaperture
For 4.2815mm；The radius of curvature of the third eyeglass median surface is 101.62mm, and thang-kng semiaperture is 6.0116mm；Described
The radius of curvature of three lens posterior surfaces is -14.689mm, and thang-kng semiaperture is 6.4246mm；The third lens front surface is in
Between the distance between face be 3.4384mm, the distance between the third eyeglass median surface and rear surface are 2.8661mm；It is described
The distance between phase mask plate rear surface and third lens front surface are 1.6762mm；
The 4th lens front surface radius of curvature is -73.2mm, and thang-kng semiaperture is 6.8136mm；Table after 4th eyeglass
Curvature radius is -26.75mm, and thang-kng semiaperture is 7.0273mm；The third lens posterior surface and the 4th lens front surface
The distance between be 0.4629mm；The distance between 4th lens front surface and the 4th lens posterior surface are 1.8261mm；
The radius of curvature of 5th lens front surface is 120.23mm, and thang-kng semiaperture is 7.1664mm；5th eyeglass
The radius of curvature of rear surface is -66.37mm, and thang-kng semiaperture is 7.3062mm；4th lens posterior surface and the 5th eyeglass
The distance between front surface is 0.1mm；The distance between 5th lens front surface and the 5th lens posterior surface are 3.8mm；
The distance between the rear surface of 5th eyeglass and 1/1.8 inch of image detector are 22.216mm.
2. according to claim 1 be based on wavefront coded hyperfocal distance imaging system, it is characterised in that：The phase mask
The 2D mask functional forms of plate are：
x,y∈[-3.2057,3.2057]
Wherein：
α characterizes the phase-modulation intensity of rectangular phase mask plate three times, and the α values are 0.01mm；
X and y is normalized aperture coordinate, and unit mm, x the and y value ranges are [- 3.2057,3.2057].
3. according to claim 1 or 2 be based on wavefront coded hyperfocal distance imaging system, it is characterised in that：The wavefront
The focal length of coded imaging camera lens is 35mm, and relative aperture is 1/3.5, and full filed angle is 30 °, operating spectrum band 480um~680um.
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| CN201721848465.8U CN207623619U (en) | 2017-12-26 | 2017-12-26 | Based on wavefront coded hyperfocal distance imaging system |
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| CN201721848465.8U Expired - Fee Related CN207623619U (en) | 2017-12-26 | 2017-12-26 | Based on wavefront coded hyperfocal distance imaging system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108089325A (en) * | 2017-12-26 | 2018-05-29 | 西安博雅精密光学科技有限公司 | Based on wavefront coded hyperfocal distance imaging system |
| US10795168B2 (en) | 2017-08-31 | 2020-10-06 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11906698B2 (en) | 2017-05-24 | 2024-02-20 | The Trustees Of Columbia University In The City Of New York | Broadband achromatic flat optical components by dispersion-engineered dielectric metasurfaces |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
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2017
- 2017-12-26 CN CN201721848465.8U patent/CN207623619U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11906698B2 (en) | 2017-05-24 | 2024-02-20 | The Trustees Of Columbia University In The City Of New York | Broadband achromatic flat optical components by dispersion-engineered dielectric metasurfaces |
| US10795168B2 (en) | 2017-08-31 | 2020-10-06 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11579456B2 (en) | 2017-08-31 | 2023-02-14 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| CN108089325A (en) * | 2017-12-26 | 2018-05-29 | 西安博雅精密光学科技有限公司 | Based on wavefront coded hyperfocal distance imaging system |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
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