CN101750736A - Optical system and camera device - Google Patents
Optical system and camera device Download PDFInfo
- Publication number
- CN101750736A CN101750736A CN200910254112A CN200910254112A CN101750736A CN 101750736 A CN101750736 A CN 101750736A CN 200910254112 A CN200910254112 A CN 200910254112A CN 200910254112 A CN200910254112 A CN 200910254112A CN 101750736 A CN101750736 A CN 101750736A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- phase differential
- light
- angle
- modulating sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The present invention provides an optical system which can enlarge the depth of field through giving a phase difference corresponding with an angle around an optical axis to the passing-through light. The optical system is provided with an optical modulation part which gives the phase difference corresponding with the angle around the optical axis to the light from an object point. Furthermore, the light from the object point is diffused through a substantially constant size with a mode which is independent from the distance to the object point through the phase modulation based on the optical modulation part. The optical modulation part can give a phase difference which varies monotonously relatively to the angle, and can give a phase difference which is substantially proportional with the angle. The optical modulation part respectively gives a phase difference which varies monotonously relatively to the angle to the light that respectively passes through a plurality of fields with different distance to the optical axis. At least a random field selected from the plurality of fields in the optical modulation part can give a phase difference which has an angle independence different from that of the phase difference given by other fields.
Description
Technical field
The present invention relates to optical system and camera head.
Background technology
As known technology have by use have 3 curved surfaces phase-plate and with the optical transfer function of optical system in the scope of distance focal position, keep in fact constant technology (as, with reference to patent documentation 1).
The flat 11-500235 communique of [patent documentation 1] special table
In order to strengthen the depth of field, expecting to make through the light after the optical system at optical axis direction as far as possible longways round optical axis.According to the technology of above-mentioned patent documentation 1 record, use by relevant x and y coordinate phase-plate with the represented curved surface of 3 formulas.Among through the light behind this phase-plate, also exist approach optical axis rapidly and with the light of optical axis intersection.Such light is because leave optical axis hastily along with leaving from the intersection point with optical axis, so work in the direction that shortens the depth of field.
Summary of the invention
In order to solve above-mentioned problem, in the 1st form of the present invention, a kind of optical system is provided, it has the light from object point is given and modulating sections round the corresponding phase differential of the angle of optical axis, and, by modulating sections to the light from object point give with round the corresponding phase differential of the angle of optical axis, with the light from object point not being given and compare, reduce and make apart from the difference of the size of the diffusion of the light of the caused object point of difference of the distance of object point round the situation of the corresponding phase differential of the angle of optical axis.
Optical system will be by spreading also passable by the mode that does not rely on apart from the distance of object point from the light of object point based on the phase modulation (PM) of modulating sections with constant substantially size.Modulating sections gives with respect to angle and the phase differential of monotone variation is also passable.Modulating sections gives with the proportional substantially phase differential of angle also passable.
Modulating sections is to passing through respectively apart from the light in the distance of optical axis a plurality of fields inequality, give respectively with respect to angle and the phase differential of monotone variation, a plurality of fields in the modulating sections at least any, the phase differential that the light of process is given the dependence of angle different with other the dependence of angle of the phase differential that the field gave is also passable.
A plurality of fields in the modulating sections, the phase differential that the light of process is given the dependence of angle different with other the dependence of angle of the phase differential that the field gave is also passable.
At least any light to process in a plurality of fields in the modulating sections gives: the phase differential that changes by the rate of change of the symbol different with other the symbol of rate of change of per unit angle of the phase differential that the field gave, with the per unit angle is also passable.
The size of the rate of change of phase differential is big more also passable in the field away from the position of optical axis more.Modulating sections is given also passable with the phase differential in complete all scope monotone variation.
Also comprise the imaging portion that pays nearly imaging also passable from institute's allocation of light on optical axis of object point.Optical system comprises that also the imaging len with imaging portion is also passable with the optical element with modulating sections.
According to the 2nd form of the present invention, a kind of camera head is provided, the image pickup part that it has optical system and by optical system subject is made a video recording, this optical system have to give from the light of object point with modulating sections round the corresponding phase differential of the angle of optical axis, and, by modulating sections to the light from object point give with round the corresponding phase differential of the angle of optical axis, with the light from object point not being given and compare, reduce and make apart from the difference of the size of the diffusion of the light of the caused object point of difference of the distance of object point round the situation of the corresponding phase differential of the angle of optical axis.
Optical system will be by spreading also passable by the mode that does not rely on apart from the distance of object point from object point light based on the phase modulation (PM) of modulating sections with constant substantially size.It is also passable according to the image processing part that the optical transfer function of the optical system iconic element based on the diffusion of light in image is able to the revisal image after the revisal also to have generation.
Modulating sections gives with respect to angle and the phase differential of monotone variation is also passable.Modulating sections gives also passable with the proportional phase differential of angle substantially.
In addition, the summary of foregoing invention does not list characteristics whole of necessity of the present invention, and these characteristics group's sub-portfolio also can become the present invention.
Description of drawings
[Fig. 1] is the figure of the example that constitutes of camera head 110 modules that relate to of expression one embodiment.
[Fig. 2 A] is the figure of an example of expression imaging len 200.
[Fig. 2 B] is the figure of the out of focus characteristic of expression imaging len 200.
[Fig. 3 A] is the figure that the embodiment of modulating sections 104 schematically is described.
[Fig. 3 B] is the figure that is illustrated in the optical system 100 out of focus characteristics in other the embodiment of modulating sections 104.
[Fig. 4 A] is the figure that the optical characteristics of optical system 100 schematically is described.
[Fig. 4 B] is the figure that the optical characteristics of optical system 100 schematically is described.
[Fig. 5 A] is the constitutional diagram of expression based on the light of the optical system under the formation that also is inserted with prism 300b.
[Fig. 5 B] is the constitutional diagram of expression based on the light of the optical system under the formation that also is inserted with prism 300b.
[Fig. 6 A] is the figure of other embodiments of expression modulating sections 104.
[Fig. 6 B] is the figure of the dependent example of rotation angle of the phase differential that other embodiments gave of expression modulating sections 104.
[Fig. 6 C] is the figure that is illustrated in the out of focus characteristic of the optical system 100 in other embodiment of modulating sections 104.
[Fig. 7 A] is the figure of expression modulating sections 104 variation.
[Fig. 7 B] is the figure of expression modulating sections 104 variation.
[Fig. 7 C] is the figure of the out of focus characteristic of expression modulating sections 104 variation.
[Fig. 8] is the figure of dependent other examples of rotation angle of the expression phase differential that each field gave.
[Fig. 9] is the figure of dependent another other examples of rotation angle of the expression phase differential that each field gave.
[Figure 10] is the figure of dependent another other examples of rotation angle of the expression phase differential that each field gave.
[Figure 11] is the figure of other examples of the phase differential that given of expression modulating sections 104.
Reference numeral:
100 optical systems
104 modulating sections
106 diaphragm portions
110 camera heads
120 control parts
152 recording mediums
170 light accepting parts
180 image processing parts
190 efferents
Embodiment
Below, the present invention will be described by the working of an invention mode, but following embodiment and the related invention of non-limiting claims, and in addition, the characteristics combination that illustrates in embodiment all is not all to be that the solution of invention is necessary.
Fig. 1 represents the example that the module of the camera head 110 that an embodiment relates to constitutes.Camera head 110 provides the camera head that can deepen the depth of field.In addition, camera head 110 has the shooting machine of camera function at mobile phone terminal that can illustration band camera function except digital camera, monitoring camera, endoscope etc.
Imaging len 200 will be from the photoimaging of object point near the assigned address on the optical axis.Imaging len 200 has round the shape of symmetrical also passable.In addition, imaging len 200 can be an example of the imaging portion in this invention.In addition, imaging len 200 can be the lens combination that is formed by a plurality of optical elements.
The light that 106 pairs in diaphragm portion sees through optical system 100 Jiao that contracts.In the example of this figure, diaphragm portion 106 is arranged between at least one optical element of imaging len 200 and modulating sections 104.In other the formation, diaphragm portion 106 is arranged on more also more passable by object side than arbitrary optical element of imaging len 200 and modulating sections 104, is arranged on more also more passable by light accepting part 170 sides than arbitrary optical element of imaging len 200 and modulating sections 104.
As shown in the figure, optical system 100 is by realizing also passable as different optical element modulating sections 104 and imaging len 200, that have an above-mentioned optical characteristics separately.In other forms, the function of modulating sections 104 and imaging len 200 is realized also passable by an optical element.In addition, the optical characteristics of optical system 100 can be by realizing also passable according to the designed a plurality of optical elements of the mode of the synthesizing optical characteristic with modulating sections 104 and imaging len 200.
In addition, the imaging apparatus that light accepting part 170 is had is that the imaging apparatus of CCD type is also passable, is that cmos type imaging apparatus is also passable.The image pickup signal of representing the light income of each imaging apparatus is supplied to image processing part 180.In addition, light accepting part 170 is as the image pickup part of making a video recording by optical system 100 subjects is played a role.
For example, to generate the revisal image also passable by image being applied inverse filter based on the optical transfer function of optical system 100 for image processing part 180.Image processing part 180 is by applying the revisal processing based on the optical transfer function of optical system 100 to the image of being made a video recording, the object point picture after will spreading via optical system 100 is recovered to a picture in the revisal image.Like this, image processing part 180 generates according to optical system 100 optical transfer functions and makes in the image revisal image after iconic element based on the diffusion of light is able to revisal.Like this, via the shot object image that optical system 100 has been blured, in the revisal image, be recovered to distinct picture.
The revisal image that efferent 190 outputs are generated by image processing part 180.For example, the recording medium of 190 pairs of document images of efferent output revisal image also can.The outside output revisal image of 190 pairs of camera heads 110 of efferent also can.For example, image such as revisal such as output such as the output device of 190 pairs of PC of efferent, printer, display etc. also can.
In addition, the imaging characteristic of the optical systems 100 such as diaphragm aperture of the position of control part 120 control optical systems 100, diaphragm portion 106.In addition, to control the focal length (also claiming focal length) of optical system 100 by the position of control imaging len 200 also passable for control part 120.
Fig. 2 A, expression imaging len 200 1 examples.By imaging len 200, the incident ray of being represented by line 250a just becomes the emergent light of being represented by line 250b, and images in the imaging point 280 on the optical axis 202.240 expressions of x axle 230 and y axle are the coordinate axis on the imaging surface of initial point with imaging point 280.In addition, draw the boost line 210 of drawing, the boost line 220 parallel concurrently with x axle 230, schematically show the boost line 290a and the b on imaging len 200 surfaces with y axle 240, be to be used for the boost line that imaging len 200 shapes represented in summary, the actual imaging len 200 of expression is not possessed.Among this figure afterwards too.In addition, in the later explanation, illustrated optical axis 202 directions are the z axle.
What Fig. 2 B represented imaging len 200 defocuses (defocus: also claim out of focus) characteristic.Figure 260a～e on this figure upper strata with the pupil function of imaging len 200 sets up expression accordingly with different defocusing amounts.Phase differential is represented with concentration in figure 260.Here, the phase differential of a wavelength amount is represented by a group of black and white.In addition, in the present embodiment, defocusing amount is represented from the paraxial image planes of imaging len 200 to the side-play amount of estimating till the image planes.
For example, as if being the figure 260c of 0 o'clock pupil function, be 0 at full field phase differential as can be known then with reference to defocusing amount.On the other hand, if the figure 260e of the pupil function when being 2Z0, then produced the phase differential of about two wavelength range degree as can be known with reference to defocusing amount.
In Ben Tu lower floor, the figure 270a～e of the point spread function of imaging len 200 (PSF) sets up expression accordingly with different defocusing amounts.For example, be the figure 270c of 0 o'clock point spread function with reference to defocusing amount, then as can be known as the pupil function of graph of a correspondence 260c is represented, from the photoimaging of object point for a bit.On the other hand, as other figure 270a, it is such that b, d, e represent, along with the size increase of defocusing amount, and fuzzy also increase.
Like this, since based on the shot object image of imaging len 200 for along with the fuzzy picture of defocusing amount.Therefore, when the existing subject of different distances was made a video recording, those shot object images were fuzzy in the fuzzy mode different along with distance, so, even shot object image is restored, also can there be the subject that is not recovered to distinct image by identical wave filter etc.
Fig. 3 A is the figure that an embodiment of modulating sections 104 schematically is described.Modulating sections 104 has a plurality of surface configurations round optical axis 202 configurations of the unit component prism of the later associated explanation of figure.Light behind the constituent parts component prism that has through imaging len 200 back and through modulating sections 104 is not to carry out some imagings, and in shooting face on the circle that leaves predetermined distance from initial point (intersection point of shooting face and z axle) with shooting hand-deliver fork.
For example, light 550a, light 550b, light 550c and light 550d represent respectively through the light behind the different unit component prisms, and these light are respectively at position 580a, position 580b, position 580c, and position 580d and shooting hand-deliver fork.And the light through behind the same units component prism intersects in position near each other in shooting face.It is measurable if the fully little then picture of unit component prism is approaching circular.If this some picture is identical for cardinal principle for defocusing amount, then the optical transfer function of optical system 100 can be considered as with respect to object point distance speech is that cardinal principle is constant, and can substantially restore by the shot object image that inverse filter will be present in different distances.About the effect of the unit component prism shown in this figure, with reference to Fig. 4 A, Fig. 4 B, Fig. 5 A and Fig. 5 B carry out following explanation.
Fig. 3 B is illustrated in the out of focus characteristic of the optical system 100 in the embodiment of modulating sections 104.Here, modulating sections 104 has 16 of the unit component prisms of the associated explanation of Fig. 3 A.
On this figure upper strata, the figure 560a～e of the pupil function of optical system 100 sets up expression accordingly with different defocusing amounts.Here, figure 560 is to be described with the same mode of describing of the figure 260 of the represented pupil function of Fig. 2 B.With reference to figure 560, the striped apperance changes along with the variation of defocusing amount, still, if compare with the figure 260 of Fig. 2 B, we can say that the shape of striped apperance has been able to abundant maintenance.
In Ben Tu lower floor, the figure 570a～e of the point spread function of optical system 100 (PSF) and defocusing amount inequality are set up expression accordingly.If with reference to figure 570a～e, then as Fig. 3 A associatedly illustrated qualitatively, point spread function had the luminous point corresponding with the constituent parts component prism (spot).And, even the position of each luminous point and size almost do not change when defocusing amount changes yet.Therefore, for image, can obtain its distinct shot object image by the inverse filter that uses appointment sometimes in the different existing subject of distance of distance optical system 100.
Fig. 4 A and Fig. 4 B are the synoptic diagram that the optical characteristics of optical system 100 schematically is described.This figure is illustrated in by being inserted with in the imaging len 200 formed light paths in the x direction and makes light under the situation of the prism 300a that light staggers.Light 350a by imaging len 200 specified point on optical axis under the situation that does not have prism 300a, because the existence of prism 300a and its direction deflection, the some 380a in shooting face on the X-axis intersects.
Represent perspective view to the plane parallel with X-axis on Fig. 4 B upper strata.Represent perspective view in Fig. 4 B lower floor to the plane parallel with the y axle.By shown in these figure as can be known, light 350b the x direction from optical axis 202 leave and in the y direction towards optical axis.Therefore, light 350b can not approach optical axis 202 below predetermined distance, can not depart from significantly from optical axis 202 yet.Like this, light 350a is by being converted in some sense round optical axis 202 around such light 350b through imaging len 200 and prism 300a.
Fig. 5 A and Fig. 5 B represent the state based on the light of the optical system of the structure that is inserted with prism 300b in the formation of Fig. 4 A again.Prism 300b disposes by the form that makes prism 300a round optical axis 202 rotations.By the light 360a of imaging len 200 towards optical axis, its direction deflection by prism 300b, the some 380b in shooting face on the x axle intersects.
Figure on Fig. 5 B upper strata and Fig. 4 B upper strata is same, represents the perspective view to the plane that is parallel to the x axle.In addition, same at the figure on Fig. 5 B lower floor and Fig. 4 B upper strata, represent perspective view to the plane that is parallel to the y axle.As the associated explanation of Fig. 4 B, light 350b is by being converted in some sense round optical axis 202 around such light 360b through imaging len 200 and prism 300b.
Having represented among Fig. 3 B, modulating sections 104 has the surface configuration that has disposed behind a plurality of unit component prisms as prism 300a, prism 300b as Fig. 3 A.Also be appreciated that to make from the explanation of relevant Fig. 4 A, Fig. 4 B, Fig. 5 A and Fig. 5 B and hold the diffusion shown in Fig. 3 A and Fig. 3 B from the light of object point and incide shooting face by modulating sections 104.
Here, under the situation that the constituent parts component prism is littler and the unit component prism is closely aligned of modulating sections 104, just depict circle perpendicular to the cross section of z axle and through the intersection point of the light behind the unit component prism.The size that should justify along with advancing and diminish along the z direction of principal axis in the position in cross section, slowly becomes big when surpassing the z direction position of regulation in the position in cross section.In other words, measurable through the light group after the modulating sections 104, form the surface that narrows down and expand at leisure thereafter along with advancing along the z direction of principal axis.Therefore, by designing the unit component prism fully for a short time, thereby optical system 100 can will spread with identical substantially size by the mode that does not rely on apart from the distance of object point from the light of object point.
Fig. 6 A represents other embodiments of modulating sections 104.If the unit prism with regulation inclination that the associated explanation of Fig. 3 A is such is countless round optical axis 202 configurations, then form optical element as shown in this figure like that round the shape of optical axis 202 its thickness monotone variation.Modulating sections 104 as this invention, the modulating sections 104 that has illustrated except Fig. 3 A and Fig. 3 B be associated, the optical element that can illustration as optical element, at the phase differential of monotone variation in complete all scopes of optical axis, be given as a kind of form with this shape.
Other embodiments give that Fig. 6 B represents modulating sections 104 with the dependent example of rotation angle of phase differential.This figure represent 104 pairs of processes of modulating sections be the footpath vector potential of the regulation light give of putting apart from modulating sections 104 centers with phase differential.In addition, so-called rotation angle is meant rotation angle round optical axis 202 in the later explanation.As shown in the figure, modulating sections 104 gives proportional substantially phase differential with rotation angle θ.Maximum phase differential is represented that by 2n π n is a positive integer.
Like this, modulating sections 104 can according to the light from object point is given with round the corresponding phase differential of the angle of optical axis.Particularly, modulating sections 104 gives with respect to round the angle of optical axis and the phase differential of monotone variation.More specifically, modulating sections 104 gives with respect to round the angle of optical axis and the dull phase differential that increases.For example, modulating sections 104 give with round the directly proportional substantially phase differential of the angle of optical axis.
Fig. 6 C represents the out of focus characteristic of optical system 100 of other embodiments of modulating sections 104.On this figure upper strata, the figure 660a～e of the pupil function of optical system 100 and defocusing amount inequality are set up expression accordingly.Here, figure 660 is by describing with the same mode of describing of the figure 260 of the pupil function shown in Fig. 2 B.Under the situation of reference figure 660, though the striped apperance also changes along with the variation of defocusing amount, when comparing with the figure 260 of Fig. 2 B, the form of striped apperance has obtained sufficient maintenance as can be known.
In Ben Tu lower floor, the figure 670a～e of the point spread function of optical system 100 (PSF) sets up expression accordingly with different defocusing amounts.Under the situation of reference figure 670a～e, as Fig. 3 A and Fig. 3 B etc. relatedly illustrated qualitatively, point spread function was circular.In addition, for the size of the figure 270 mid point pictures of Fig. 2 B changed significantly along with the variation of defocusing amount, the size of annulus not too depended on the variation of defocusing amount among figure 670a～e of this figure as can be known.Therefore, even be the subject of different distance, also can obtain this shot object image sometimes by the inverse filter that is suitable for regulation for being present in apart from optical system 100.
Fig. 7 A, Fig. 7 B and Fig. 7 C represent modulating sections 104 variation.In this figure expression modulating sections 104 in cross section perpendicular to the cross section institute projection of optical axis, the field that imaging characteristic is inequality has been represented in field 700～704.The inclination of each field 700～704 its anglec of rotation direction is inequality mutually in the modulating sections 104 of this variation.
Fig. 7 B represent modulating sections 104 give with the example of dependence of angle of phase differential.This figure represented to through apart from modulating sections 104 centers be the field of vowing scope, the footpath of regulation light give with phase differential.As shown, the field 704 of modulating sections 104 gives proportional substantially phase differential with rotation angle θ, and maximum phase differential is 2n π at n during for positive integer.The field 703 of modulating sections 104 gives proportional substantially phase differential with rotation angle θ, and maximum phase differential is 2m π at m during for positive integer.Wherein, establish m＜n.Other field 700～702 give with phase differential give proportional substantially phase differential too with rotation angle θ, maximum phase differential is that the positive integral multiple of 2 π is also passable.
Like this, 104 pairs of modulating sections are passed through respectively apart from the light in the distance of optical axis a plurality of fields 700～704 inequality, give respectively with respect to the phase differential round the angle monotone variation of optical axis.In addition, a plurality of fields 700～704 in the modulating sections 104 at least any, to the light of process give with other field give with the phase differential of the different dependence of angle of the dependence of angle of phase differential.It is also passable that a plurality of fields 700～704 in the modulating sections 104 all give the phase differential of the dependence of angle different with other the dependence of angle of the phase differential that the field gave to the light of process.For example, a plurality of fields 700～704 give respectively with the differential value of relevant angle of phase differential, difference mutually.Have again, the size of the rate of change of phase differential, from optical axis further from the field of position bigger also passable.
Fig. 7 C is illustrated in the modulating sections 104 out of focus characteristics in the variation.On this figure upper strata, the figure 760a～e of the pupil function of modulating sections 104 sets up expression accordingly with different defocusing amounts.Figure 760 is by drawing with the same mode of describing of the figure 260 of the pupil function shown in Fig. 2 B.
In Ben Tu lower floor, the figure 770a～e of the point spread function of modulating sections 104 (PSF) and defocusing amount inequality are set up expression accordingly.Under the situation of reference figure 770a～e, when comparing with the point spread function that Fig. 6 C is showed, its annulus thickening.And under the situation with reference to figure 770a～e of this figure, the size of annulus and thickness rely on for the variation of defocusing amount hardly as can be known.Annulus thickness in this variation is to be obtained by the synthetic of the characteristic in 700～704 each field, field, we can say to be in the dispersed state of light in some sense.
With reference to figure 770a～e of this figure, the size of annulus depends on the variation of defocusing amount hardly as can be known.Therefore, even for being present in, also can being suitable for the inverse filter of regulation sometimes and obtaining its shot object image apart from optical system 100 subject for different distances.
In addition, with reference to the figure 670 shown in Fig. 6 C, the thickness attenuation of annulus is in the intensive state of light in some sense.For this cause, for the variation of the defocusing amount of the size of annulus and variation in thickness of annulus and so on, anti-sometimes out of focus becomes lower.On the other hand, with reference to figure 770, because annulus becomes thicker, so even how much change the variation of such defocusing amount with respect to the size of annulus, the thickness of annulus, anti-out of focus is also than higher.
Fig. 8 represent each field give with dependent other example of rotation angle of phase differential.In this figure, as an example represented in five fields field 703 and in the field 704 rotation angle dependence.Illustrated rotation angle dependence and in the rotation angle dependence shown in Fig. 7 B is variant on 0 the different this point of angle at phase differential.Particularly, phase differential becomes 0 the rotation angle π that staggers.Like this, each 700～field, field 704 give with phase differential become 0 rotation angle, with other arbitrary at least field give with phase differential to become 0 angle different also passable.
Fig. 9 represent each field give with dependent other other examples of rotation angle of phase differential.In this figure, represented field 703 and 2 rotation angle dependences of 704 in the field as an example.Illustrated rotation angle dependence and the rotation angle dependence of representing by Fig. 7 B, variant on the symbol of the inclination in field 703 this point inequality.Like this, at least one of a plurality of fields 700～704 in the modulating sections 104, to the light of process give by with other field give with the rate of change of the different symbol of the symbol of rate of change of per unit angle of phase differential also passable with the phase differential that the per unit angle changes.In addition, the size of the rate of change of phase differential from optical axis further from the field of position bigger also passable.
Figure 10 represent each field give with dependent other other examples of rotation angle of phase differential.The rotation angle dependence of in this figure, having represented 2 fields in field 703 and field 704 as an example.Field 704 gives with phase differential dull increasing till the rotation angle π, become maximal value 2n π at rotation angle π.Here, n is a positive integer.And, field 704 gives with phase differential reduce from the scope of π to 2 π is dull in rotation angle.
On the other hand, the phase differential that field 703 is given, in rotation angle 0 its be 2m π, in that it dullly reduces till rotation angle π, it is 0 at rotation angle π.The phase differential that field 703 is given, the scope in rotation angle from π to 2 π is dull to be increased.In addition, the maximal value of the phase differential that given of field 703 is 2m π at m during for positive integer.
Figure 11 represents other examples of the phase differential that modulating sections 104 is given.This figure represents the example that distributed by the phase differential that the modulating sections 104 with the same structure of the structure of the associated a plurality of units prism-like that has illustrated of Fig. 3 A and Fig. 3 B obtains.As shown in the figure, the phase differential that modulating sections 104 is given, under the situation of watching along the direction of rotation angle direction, dull increasing reached after 21 π till from 0 to 21 π, once more dull increasing till from 0 to 21 π.Here, 1 is positive integer.Have, the modulating sections 104 of the associated explanation of Fig. 7 A has at least one field in a plurality of fields again, and the phase differential that has by " wedge shape " such shown in this figure distributes also passable.
In addition, represented the phase-plate of all curve forms as an example of modulating sections 104 in above-mentioned, still, modulating sections 104 can make the wave front distortion with other all means.For example, can list as modulating sections 104: the optical element of variations in refractive index (for example, the wave front modulated optical element of distributed refractive index), by to the coating of lens surface and the optical element of thickness and variations in refractive index (for example, wave front modulation hybrid lens), the liquid crystal cell (for example, liquid crystal spatial phase modulation component) that can modulate of the PHASE DISTRIBUTION of light etc.
More than, describe the present invention by utilizing embodiment, still, the scope of technology of the present invention is not limited by the scope of above-mentioned embodiment record.Can implement diversified change or improvement on above-mentioned embodiment, be clearly to those skilled in the art.And the record according to claims of the application can be clear and definite, and the form of implementing after above-mentioned change and the improvement is also contained in the technical scope of the present invention.
In addition, in device, system, program and the action in method of claims, instructions and expression in the accompanying drawings, order, step, and each implementation of handling order in stage etc., do not indicate especially " ratio ... earlier ", " ... before " etc., and must use the output of the processing of front so long as not the processing of back, just can implement in any order.About the motion flow in claims, instructions and the accompanying drawing,, used " at first, " for the convenience on illustrating, printed words such as " secondly " are illustrated, even but neither mean that like this implementing with this program is necessary condition.
Claims (14)
1. optical system, wherein,
Have: the light from object point is given and modulating sections round the corresponding phase differential of the angle of optical axis,
By above-mentioned modulating sections the light from object point is given with above-mentioned round the corresponding phase differential of the angle of optical axis, with the light from object point not being given to compare with above-mentioned situation round the corresponding phase differential of the angle of optical axis, reduce and make apart from the difference of the size of the diffusion of the caused light from object point of the difference of the distance of object point.
2. optical system according to claim 1, wherein
Above-mentioned modulating sections gives above-mentioned relatively angle and the phase differential of monotone variation.
3. optical system according to claim 2,
Above-mentioned modulating sections gives and the proportional substantially phase differential of above-mentioned angle.
4. according to claim 2 or 3 described optical systems,
Above-mentioned modulating sections gives the phase differential of above-mentioned relatively angle monotone variation respectively to passing through respectively apart from the light in the different a plurality of fields of the distance of above-mentioned optical axis;
Above-mentioned a plurality of fields in the above-mentioned modulating sections at least any, the light of above-mentioned process is given the phase differential of the dependence of angle different with other the dependence of angle of the phase differential that above-mentioned field gave.
5. optical system according to claim 4, wherein
Above-mentioned a plurality of fields in the above-mentioned modulating sections give the phase differential of the dependence of angle different with other the dependence of angle of the above-mentioned phase differential that above-mentioned field gave to the light of process.
6. according to request 4 described optical systems, wherein,
At least any light to process in the above-mentioned a plurality of fields in the above-mentioned modulating sections gives: the phase differential that changes by the rate of change of the symbol different with other the symbol of rate of change of per unit angle of the above-mentioned phase differential that above-mentioned field gave, with the per unit angle.
7. optical system according to claim 4, wherein,
The size of the rate of change of above-mentioned phase differential is big more in the above-mentioned field away from the position of above-mentioned optical axis more.
8. according to claim 2 or 3 described optical systems, wherein,
Above-mentioned modulating sections gives the phase differential in complete all scope monotone variation.
9. according to each described optical system in the claim 1 to 3, wherein,
Also comprise imaging portion, will be near the light imaging assigned position on the above-mentioned optical axis of object point.
10. optical system according to claim 9, wherein,
Above-mentioned optical system also comprises:
Imaging len with above-mentioned imaging portion; With
Optical element with above-mentioned modulating sections.
11. a camera head wherein, possesses:
Optical system, it has the light from object point is given and modulating sections round the corresponding phase differential of the angle of optical axis; And, by above-mentioned modulating sections the light from object point is given with above-mentioned round the corresponding phase differential of the angle of optical axis, with the light from object point is not given compare with above-mentioned situation round the corresponding phase differential of the angle of optical axis, reduce and make apart from the difference of the size of the diffusion of the light of the caused object point of difference of the distance of object point; With
Image pickup part, it is made a video recording to subject by above-mentioned optical system.
12. camera head according to claim 11, wherein,
Also have image processing part, it generates optical transfer function according to above-mentioned optical system and makes revisal image after the iconic element based on the diffusion of above-mentioned light in the image that above-mentioned image pickup part makes a video recording is able to revisal.
13. camera head according to claim 12, wherein,
Above-mentioned modulating sections gives the phase differential of above-mentioned relatively angle monotone variation.
14. camera head according to claim 13, wherein,
Above-mentioned modulating sections gives and the proportional substantially phase differential of above-mentioned angle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008312532A JP5150937B2 (en) | 2008-12-08 | 2008-12-08 | Optical system and imaging apparatus |
| JP2008-312532 | 2008-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101750736A true CN101750736A (en) | 2010-06-23 |
| CN101750736B CN101750736B (en) | 2013-10-09 |
Family
ID=42345698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910254112 Expired - Fee Related CN101750736B (en) | 2008-12-08 | 2009-12-07 | Optical system and camera device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5150937B2 (en) |
| CN (1) | CN101750736B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636874A (en) * | 2011-02-09 | 2012-08-15 | 全视技术有限公司 | Apparatus and method for three-dimensional image capture with extended depth of field |
| CN108830773A (en) * | 2018-05-25 | 2018-11-16 | 合肥羿振电力设备有限公司 | A kind of hiding and recognition methods based on the pretreated anti-counterfeiting information of host image |
| CN111103697A (en) * | 2020-01-04 | 2020-05-05 | 四川大学 | Phase diversity based imaging of scattering media using spatial light modulators |
| US11510548B2 (en) | 2016-12-16 | 2022-11-29 | Sony Corporation | Capturing an image of a scene |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5567692B2 (en) * | 2010-01-22 | 2014-08-06 | ザ トラスティーズ オブ コロンビア ユニヴァーシティ イン ザ シティ オブ ニューヨーク | System, method, and media for recording an image using an optical diffuser |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002513951A (en) * | 1998-05-01 | 2002-05-14 | ユニバーシティ テクノロジー コーポレイション | Expanded depth of field optical system |
| JP2008268869A (en) * | 2007-03-26 | 2008-11-06 | Fujifilm Corp | Image capturing device, image capturing method, and program |
| JP2010087893A (en) * | 2008-09-30 | 2010-04-15 | Fujifilm Corp | Imaging apparatus, method of imaging and program |
-
2008
- 2008-12-08 JP JP2008312532A patent/JP5150937B2/en not_active Expired - Fee Related
-
2009
- 2009-12-07 CN CN 200910254112 patent/CN101750736B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636874A (en) * | 2011-02-09 | 2012-08-15 | 全视技术有限公司 | Apparatus and method for three-dimensional image capture with extended depth of field |
| CN102636874B (en) * | 2011-02-09 | 2017-07-07 | 豪威科技股份有限公司 | The 3D image capture units and method of tool full width focusing |
| US11510548B2 (en) | 2016-12-16 | 2022-11-29 | Sony Corporation | Capturing an image of a scene |
| CN108830773A (en) * | 2018-05-25 | 2018-11-16 | 合肥羿振电力设备有限公司 | A kind of hiding and recognition methods based on the pretreated anti-counterfeiting information of host image |
| CN111103697A (en) * | 2020-01-04 | 2020-05-05 | 四川大学 | Phase diversity based imaging of scattering media using spatial light modulators |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101750736B (en) | 2013-10-09 |
| JP5150937B2 (en) | 2013-02-27 |
| JP2010134372A (en) | 2010-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101750736B (en) | Optical system and camera device | |
| CN102668537B (en) | Multocular image pickup apparatus and multocular image pickup method | |
| US9794477B2 (en) | Image-capturing device and image processing method | |
| CN102883093B (en) | Camera head and imaging apparatus | |
| CN102164293B (en) | Image processing apparatus, image processing method and imaging device | |
| US8436909B2 (en) | Compound camera sensor and related method of processing digital images | |
| CN102844788B (en) | Image processing apparatus and use the image pick-up device of this image processing apparatus | |
| US8259216B2 (en) | Interchangeable lens camera system having autofocusing function | |
| US7286168B2 (en) | Image processing apparatus and method for adding blur to an image | |
| WO2012043211A1 (en) | Imaging device | |
| US7911516B2 (en) | Camera module and electronic apparatus provided with it | |
| WO2006137481A1 (en) | Image input device, photo-detection device, image synthesis method | |
| CN102143305B (en) | Image pickup method and system | |
| US9083879B2 (en) | Focus detection apparatus, control method thereof, and image pickup apparatus | |
| US9838665B2 (en) | Image processing device, imaging device, and image processing program | |
| CN105323423A (en) | Image processing method, image processing apparatus, and image pickup apparatus | |
| US20050275904A1 (en) | Image capturing apparatus and program | |
| JP2006279940A (en) | Imaging apparatus, imaging method, imaging program, imaging output system and image recording output method | |
| CN101094319A (en) | Image pickup apparatus and signal processor | |
| CN105122793A (en) | Image processing device, image capture device, and image processing program | |
| CN103813155B (en) | Multi-view image acquisition methods, device and three-dimensional camera, three-dimensional camera | |
| WO2014192300A1 (en) | Imaging element, imaging device, and image processing device | |
| CN106454318A (en) | Stereoscopic imaging method and stereoscopic imaging device | |
| CN104322061A (en) | Image processing device, imaging device, and image processing program | |
| KR101327228B1 (en) | Image pick-up device with an aperture estimating distance information of object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20211207 |