CN102122071A - Design method and system of digital optical imaging - Google Patents

Abstract

The invention discloses a digital optical imaging system, comprising at least an optical module and an image recovery module, and the design method comprises a step of setting re-set target, a design step of optical module, and a design step of image recovery module, wherein optimized criterion is carried out by using the similarity and fuzzy minimum value of point spread function produced by the optical module and the similarity and fuzzy minimum value of point spread function outputted by the image recovery module, and the design step of optical module and the design step of image recovery module are carried out individually or sequentially, and simultaneously the design of the optical imaging system is carried out by means of a computer software product.

Description

The method for designing of digital optical imaging and system

The application is for dividing an application, the application number of its female case is: 200810214043.4, and the applying date: on August 22nd, 2008, priority date: on June 25th, 2008, the applicant: Industrial Technology Research Institute, denomination of invention: digital optical imaging relate to method and system.

Technical field

The present invention relates to a kind of method for designing and system of digital optical imaging, particularly relate to a kind of optical module and image processing module individual design and modular System and method in addition.

Background technology

Though in optical industry, be similar to conventional industries, have higher rate of gross profit; Moreover optical industry must highly rely on technician's experience accumulation in manufacture process and parameter control etc., the perfection that optical articles can be made, and therefore, compared to information products, optical articles has long development stage usually.

Adopt at present the hybrid digital optical imaging system 1 that integrates optical module and image reduction module, as shown in Figure 1, it is the design flow diagram of the existing hybrid digital optical imaging of expression system, its method for designing is used prime optical module 1A and back level image reduction module 1B, and must design in order, meaning i.e. back level image reduction module 1B must produce a point spread function (pointspread function at prime optical module 1A, PSF) after the P, the point spread function PSF that is produced according to prime optical module 1A designs with image output matrix IB again, to carry out optimization person if do not reach deviser's standard, come back to prime optical module 1A again, design to repeat above-mentioned steps.

Back level image reduction module (for example reduce wave filter) must just can design according to the result of prime optical module (for example camera lens framework), meaning even will design back level image reduction module, must finish the design of prime optical module earlier, otherwise a back level image reduction module promptly have nothing to prove, do not have compare.

And similar so structure, can be with reference at U.S. publication US20050197809, it provides a kind of in order to optimization optics and digitized video designed system and method, and it is estimated according to an end value in order to judge digital image optical system rule how.Generally speaking, this end value with reference to image with the reduction image mean square deviation (mean square error, MSE).

In addition, at U.S. publication US20070239417, a kind of method in order to the design camera is provided, camera comprises the some objective lens units in order to formation one fuzzy image on an electronic imaging sensor, and in order to form the virtual lens (virtual lens) that restores above-mentioned fuzzy image (de-blurred image).The function of virtual lens is identical with digital filter (being above-mentioned reduction wave filter).This method comprises the design that defines objective lens unit, and the coefficient of decision digital filter.One input image is in regular turn via the design of objective lens unit and the processes such as decision of digital filter coefficient, so that produce the image output of camera simulated operation.The demonstration of this image output by camera the deviser estimated.In the design limit of real objective lens unit, relax by the use of virtual lens, have an extra optical module just as the optical design system and be incorporated in the design, to reach the purpose of aberration correction (aberration correction).

And above-mentioned existing technology may produce following point or difficulty:

1. the optical module of imaging and image processing module only can integrate and design;

2. the prime optical module be there is no especially effectively and method for designing fast;

3. image calculating is time-consuming, and optimized speed is extremely slow;

4. be difficult for reaching objective image evaluation;

5. the prime optical module must divide the work to fail to understand with back level image reduction module.

So, how can design optical module and image processing module individually, reducing the time that image calculates, and promote optimized speed, be at present on the designing image disposal system, an instant problem.

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of method for designing and system of digital optical imaging, is used for optical module and digitized video module individual modulesization, and optimization in addition separately, to be reduced into best digitized video.

To achieve these goals, the invention provides a kind of method for designing of digital optical imaging, comprise: an expectation goal-setting step; One optical module design procedure; An and digitized video recovery module design procedure; Wherein, this optical module design procedure and this digitized video recovery module design procedure carry out synchronously or in regular turn.

A kind of method for designing of digital optical imaging is characterized in that, step comprises:

A. one expects the goal-setting step;

B. an optical module design procedure; And

C. a digitized video recovery module design procedure;

Wherein this optical module design procedure and this digitized video recovery module design procedure carry out synchronously or in regular turn.

The method for designing of described digital optical imaging, wherein, this expectation target is set step one a predetermined point spread function and a critical value is provided.

The method for designing of described digital optical imaging, wherein, this optical module design procedure comprises:

B1. produce an optics point spread function by an optical module;

B2. the similarity of this optics point spread function and this predetermined point spread function relatively;

B3. when the similarity of this optics point spread function and this predetermined point spread function is equal to or greater than this critical value, export the parameter of this optical module; And

B4. when the similarity of this optics point spread function and this predetermined point spread function during less than this critical value, this optical module of optimization and repeating step B1.

The method for designing of described digital optical imaging, wherein, this step B2 comprises that also relatively the blur level of this optics point spread function and this predetermined point spread function minimizes.

The method for designing of described digital optical imaging, wherein, the parameter of this optical module comprises a refractive index, a curvature value, an one-tenth-value thickness 1/10 and asphericity coefficient at least.

The method for designing of described digital optical imaging, wherein, this digitized video recovery module design procedure comprises:

C1. produce an image reduction point spread function by a digitized video recovery module;

C2. the similarity of this image reduction point spread function and this predetermined point spread function relatively;

C3. when the similarity of this image reduction point spread function and this predetermined point spread function is equal to or greater than this critical value, export the parameter of this digitized video recovery module; And

C4. when the similarity of this image reduction point spread function and this predetermined point spread function during, optimize this digitized video recovery module and repeating step C1 less than this critical value.

The method for designing of described digital optical imaging, wherein, this step C2 comprises that also relatively the blur level of this optics point spread function and this predetermined point spread function minimizes.

The method for designing of described digital optical imaging, wherein, the parameter of this digitized video recovery module comprises a regulation and control parameter value at least.

To achieve these goals, the present invention also provides a kind of method for designing of digital optical imaging, it is characterized in that, step comprises:

D1. provide a fixing image reduction point spread function by a digitized video recovery module;

D2. produce an optics point spread function by an optical module;

D3. the similarity of this optics point spread function and image reduction point spread function that should be fixing relatively;

D4. when this optics point spread function is equal to or greater than a critical value with the similarity of being somebody's turn to do fixing image reduction point spread function, export the parameter of this optical module; And

D5. when the similarity of this optics point spread function and image reduction point spread function that should be fixing during, optimize this optical module and repeating step D2 less than this critical value.

The method for designing of described digital optical imaging, wherein, this step D3 comprises that also relatively this optics point spread function minimizes with the blur level of being somebody's turn to do fixing image reduction point spread function.

The method for designing of described digital optical imaging, wherein, the parameter of this optical module comprises a refractive index, a curvature value, an one-tenth-value thickness 1/10 and asphericity coefficient at least.

To achieve these goals, the present invention also provides a kind of method for designing of digital optical imaging, it is characterized in that, step comprises:

E1. provide a fixing optics point spread function by an optical module;

E2. produce an image reduction point spread function by a digitized video recovery module;

E3. relatively be somebody's turn to do the fixing optics point spread function and the similarity of this image reduction point spread function;

E4. when the similarity of this fixing optics point spread function and this image reduction point spread function is equal to or greater than a critical value, export the parameter of this digitized video recovery module; And

E5. when the similarity of this fixing optics point spread function and this image reduction point spread function during, optimize this digitized video recovery module and repeat step e 2 less than this critical value.

The method for designing of described digital optical imaging, wherein, this step e 3 comprises that also relatively being somebody's turn to do the fixing optics point spread function and the blur level of this image reduction point spread function minimizes.

The method for designing of described digital optical imaging, wherein, the parameter of this digitized video recovery module comprises a regulation and control parameter value at least.

To achieve these goals, the present invention also provides the combined method of a kind of digital optical imaging system, and this digital optical imaging system comprises a plurality of optical modules and a plurality of digitized video recovery module, it is characterized in that its method comprises:

Choose these optical modules one of them, and obtain at least one point spread function of this optical module;

Choose these image reduction modules one of them, and obtain at least one point spread function of this image reduction module; And

Analyze the similarity of the point spread function of this optical module and this image reduction module respectively or in order, and, this optical module and this image reduction module are formed this digital optical imaging system according to a predetermined critical value.

The combined method of the system of described digital optical imaging, wherein, also comprise and obtain the minimized numerical value of at least one point spread function blur level of this optical module, and the minimized numerical value of at least one point spread function blur level of obtaining this image reduction module, minimize numerical value with the spread function blur level of this image reduction module and equate when the point spread function blur level of this optical module minimizes numerical value, perhaps greater than, when equaling a predetermined critical value, this optical module and this image reduction module are formed this digital optical imaging system.

To achieve these goals, the present invention also provides a kind of method for designing of digital optical imaging, it is characterized in that, step comprises:

F1. produce at least two optics point spread functions by an optical module;

F2. the similarity that compares these optics point spread functions;

F3. when the similarity of these optics point spread functions is equal to or greater than a critical value, export the parameter of this optical module; And

F4. when the similarity of these optics point spread functions during, optimize this optical module and repeat step F 1 less than this critical value.

The method for designing of described digital optical imaging, wherein, this step F 2 comprises that also the blur level of these optics point spread functions of comparison minimizes.

The method for designing of described digital optical imaging, wherein, the parameter of this optical module comprises a refractive index, a curvature value, an one-tenth-value thickness 1/10 and asphericity coefficient at least.

To achieve these goals, the present invention also provides a kind of method for designing of digital optical imaging, it is characterized in that, step comprises:

G1. produce at least two image reduction point spread functions by a digitized video recovery module;

G2. the similarity that compares these image reduction point spread functions;

G3. when the similarity of these image reduction point spread functions is equal to or greater than a critical value, export the parameter of this digitized video recovery module; And

G4. when the similarity of these image reduction point spread functions during, optimize this digitized video recovery module and repeating step G1 less than this critical value.

The method for designing of described digital optical imaging, wherein, this step G2 comprises that also the blur level of these image reduction point spread functions of comparison minimizes.

The method for designing of described digital optical imaging, wherein, the parameter of this digitized video recovery module comprises a regulation and control parameter value at least.

To achieve these goals, the present invention also provides a kind of digital optical imaging method for designing, is used for the design by at least one computer realization digital optical imaging, it is characterized in that, this imaging method for designing comprises the following step at least:

H1. modularization one digital imaging system becomes an optical module and an image reduction module, and defines a plurality of optics variablees;

H2. the similarity of the point spread function of the point spread function by this optical module and/or this image reduction module, the optical property of this digit optical system of optimization; And

H3. via this optical module of optimization and/or this image reduction module, revising the optics variable, and repeating step H1.

To achieve these goals, the present invention also provides a kind of digital optical imaging system, and comprise: an optical module has an optics critical value and an optics point spread function, and an image reduction module, have an image reduction critical value and an image reduction point spread function; Wherein, this optical module is by the similarity of this optics point spread function and the comparison of this optics critical value, to carry out optimization, this image reduction module is by the similarity of this image reduction point spread function and the comparison of this image reduction critical value, to carry out optimization.

The preferably, this optical module also can be by the fuzzy minimum value of this optics point spread function and the comparison of this optics critical value, to carry out optimization; This image reduction module also can be by the fuzzy minimum value of this image reduction point spread function and the comparison of this image reduction critical value, to carry out optimization.

Therefore, the present invention is by above-mentioned structure and method, can be individually and individually design optical module and digitized video module, arrange in pairs or groups mutually again, and to reach the effect of indivedual optimizations and modularization individual matches, use the saving cost.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Description of drawings

Fig. 1 is the design flow diagram of the existing hybrid digital optical imaging of expression system;

Fig. 2 is the process block diagram of expression digital optical imaging of the present invention;

Fig. 3 is the calcspar of expression first embodiment of the invention;

Fig. 4 is the calcspar of expression second embodiment of the invention;

Fig. 5 is the calcspar of expression third embodiment of the invention;

Fig. 6 is the calcspar of expression four embodiment of the invention;

Fig. 7 is the calcspar of expression fifth embodiment of the invention;

Fig. 8 is the calcspar of expression sixth embodiment of the invention;

Fig. 9 is the calcspar that expression the present invention is applied to software product;

Before Figure 10 is the expression optimization, with Doublet software simulation result's curve map;

After Figure 11 is the expression optimization, with Doublet software simulation result's curve map;

Figure 12 is the tabulation figure of expression analog parameter variable of the present invention.

Wherein, Reference numeral:

1 hybrid digital optical imaging system

1A prime optical module

Level image reduction module behind the 1B

The system of 2 digital optical imagings

The 2A optical module

2B image reduction module

The system of 3 digital optical imagings

The 3A optical module

3B image reduction module

4 software products

IS digital optical imaging system

The MI1 first image reduction module

The MI2 second image reduction module

The fuzzy minimum value of MIO optics point spread function

The fuzzy minimum value of MID image reduction point spread function

MO1 first optical module

MO2 second optical module

The point spread function that PD is predetermined

PI image reduction point spread function

PI1 image reduction point spread function

PI2 image reduction point spread function

The image reduction point spread function that PIF is fixing

PO optics point spread function

PO1 optics point spread function

PO2 optics point spread function

The optics point spread function that POF is fixing

The previous point spread function that once produces or export of PSF1

The point spread function that PSF2 produces next time or exports

The T critical value

Step SA1 sets an expectation target;

Step SA2 designs an optical module;

Step SA3 designs a digitized video module;

Step SA4 exports an optical image and a numeral reduction image;

Step SB1 produces an optics point spread function from optical module;

Step SB2 compares the similarity of optics point spread function and predetermined point spread function;

When step SB3 is equal to or greater than critical value when the similarity of optics point spread function and predetermined point spread function, the parameter of output optical module;

Step SB4 is when the similarity of optics point spread function and predetermined point spread function during less than critical value, with optical module optimization and repeating step;

Step SC1 produces an image reduction point spread function from the image reduction module;

Step SC2 compares the similarity of image reduction point spread function and predetermined point spread function;

When step SC3 is equal to or greater than critical value when the similarity of image reduction point spread function and predetermined point spread function, the parameter of output digitized video recovery module;

Step SC4 is when the similarity of image reduction point spread function and predetermined point spread function during less than critical value, with digitized video recovery module optimization and repeating step SC2;

Step SD1 provides a fixing image reduction point spread function by the digitized video recovery module;

Step SD2 produces an optics point spread function by optical module;

Step SD3 is the similarity of optics point spread function and fixing image reduction point spread function relatively;

When step SD4 is equal to or greater than a critical value when the similarity of optics point spread function and fixing image reduction point spread function, the parameter of output optical module;

Step SD5 is when the similarity of optics point spread function and fixing image reduction point spread function during less than critical value, with optical module optimization and repeating step SD2;

Step SE1 provides a fixing optics point spread function by optical module;

Step SE2 produces an image reduction point spread function by the digitized video recovery module;

The optics point spread function that step SE3 is relatively more fixing and the similarity of image reduction point spread function;

When step SE4 is equal to or greater than a critical value when the similarity of fixing optics point spread function and image reduction point spread function, the parameter of output digitized video recovery module;

Step SE5 carries out optimization and repeating step SE2 when the similarity of fixing optics point spread function and image reduction point spread function during less than critical value with the digitized video recovery module;

Step SF1 produces at least two optics point spread functions from optical module;

Step SF2 is by analyzing at least two optics point spread functions that optical module produces, so that optical module is carried out optimization;

Step SF3 relatively the optics point spread function similarity whether greater than, equal critical value T;

If step SF4 greater than, equal a critical value T person, promptly export optical results, for example optical parametric;

If step SF5 is less than critical value T person, i.e. repeating step SF1;

Step SG1 produces at least two image reduction point spread functions from the image reduction module;

Step SG2 is by analyzing at least two image reduction point spread functions that the image reduction module produces, so that the image reduction module is carried out optimization;

Step SG3 relatively the image reduction point spread function similarity whether greater than, equal critical value T;

If step SG4 is more than or equal to a critical value T person, promptly the image output reduction result is for example regulated and control parameter value;

If step SG5 is less than critical value T person, i.e. repeating step SG1;

Step SH1 modularization one digital imaging system comprises some optics variable-definitions;

Step SH2 is by the similarity of point spread function, the optical property of optimization digit optical system;

Step SH3 is via optimization and repeating step SH1, to revise the optics variable;

Embodiment

Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is made further more detailed description.

Please refer to Fig. 2, is the process block diagram of expression digital optical imaging of the present invention; The system 2 of the digital optical imaging of present embodiment comprises an optical module 2A (for example, lens set structure) and image reduction module 2B (for example, reduction wave filter); Optical module 2A and image reduction module 2B can individually operate, or running simultaneously.

And optical module 2A can produce an optics point spread function (point spread function, PSF) PO, the reducible point spread function PI of the exportable image of image reduction module; And the similarity by the comparison point spread function, or optical transfer function (optical transfer function, similarity OTF) can individually be designed optical module 2A and digitized video module 2B.From the viewpoint of mathematics, optical transfer function is the fourier transform of point spread function.Therefore, optical transfer function etc. is all point spread function.And analyzer An carries out the comparative approach of point spread function similarity, comprises degree of verisimilitude (Fidelity), correlativity (Correlation) and Hibert space projectional angle (Hilbert Space Projected Angle), and its equation apportion is as follows:

Degree of verisimilitude:

$F=1-\frac{{\∫}_{-\∞}^{\∞}{\∫}_{-\∞}^{\∞}{\left((\mathrm{PSF}2(x,y)-\mathrm{PSF}1(x,y)\right)}^2\mathrm{dxdy}}{{\∫}_{-\∞}^{\∞}{\∫}_{-\∞}^{\∞}{\left(\mathrm{PSF}1(x,y)\right)}^2\mathrm{dxdy}}.$

Correlativity:

$C=\frac{{\∫}_{-\∞}^{\∞}{\∫}_{-\∞}^{\∞}\mathrm{PSF}1(x,y)\mathrm{PSF}2(x,y)\mathrm{dxdy}}{{\∫}_{-\∞}^{\∞}{\∫}_{-\∞}^{\∞}{\left(\mathrm{PSF}1(x,y)\right)}^2\mathrm{dxdy}}$

The Hibert space projectional angle:

$H=\frac{{\∫}_{-\∞}^{\∞}{\∫}_{-\∞}^{\∞}\mathrm{PSF}1(x,y)\mathrm{PSF}2(x,y)\mathrm{dxdy}}{\sqrt{{\∫}_{-\∞}^{\∞}{\∫}_{\∞}^{\∞}{\left(\mathrm{PSF}1(x,y)\right)}^2\mathrm{dxdy}}\sqrt{{\∫}_{-\∞}^{\∞}{\∫}_{\∞}^{\∞}{\left(\mathrm{PSF}2(x,y)\right)}^2\mathrm{dxdy}}}$

Wherein, the PSF1 in the formula is the previous point spread function that once produces or export of optical module 2A or image reduction module 2B, and PSF2 is the point spread function that optical module 2A or image reduction module 2B produce next time or export; The design procedure that it is detailed will describe in detail in the back.

Please refer to Fig. 3, is the calcspar of expression first embodiment of the invention.The system 3 of present embodiment comprises an optical module 3A and an image reduction module 3B, and present embodiment explanation optical module 3A collocation image reduction module 3B designs simultaneously, and its design procedure comprises:

Step SA2: design an optical module 3A; And

Step SA3: design a digitized video module 3B.

Before design optical module and design digitized video module, the deviser can set an expectation target (step SA1) earlier, comprise a predetermined point spread function PD and desire to reach the critical value T of image optimumization.

Among the step SA2, also comprise:

Step SB1: produce an optics point spread function PO from optical module 3A;

Step SB2: the similarity that compares optics point spread function PO and predetermined point spread function PD;

Step SB3: when the similarity of optics point spread function PO and predetermined point spread function PD is equal to or greater than critical value T, the parameter of output optical module; And

Step SB4: when the similarity of optics point spread function PO and predetermined point spread function PD during less than critical value T, with optical module optimization and repeating step SB1.

Among the step SA3, also comprise:

Step SC1: produce an image reduction point spread function PI from image reduction module 3B;

Step SC2: the similarity that compares image reduction point spread function PI and predetermined point spread function PD;

Step SC3: when the similarity of image reduction point spread function PI and predetermined point spread function PD is equal to or greater than critical value T, the parameter of output digitized video recovery module; And

Step SC4: when the similarity of image reduction point spread function PI and predetermined point spread function PD during less than critical value T, with digitized video recovery module optimization and repeating step SC1.

In step SB2, its mode that compares similarity comprises above-mentioned degree of verisimilitude, correlativity and Hibert space projectional angle; And except comparing similarity, also comprise fuzzy minimum value (blur minimization) MIO of comparison optics point spread function; And in step SC2, also comprise the fuzzy minimum M ID of comparison image reduction point spread function.

Moreover the parameter of being exported in step SB3 comprises a refractive index, a curvature, an one-tenth-value thickness 1/10 and an asphericity coefficient, or its combination; And the parameter of being exported among the step SC3 comprises regulation and control parameter, regularization parameter (regularization parameter) and a signal noise ratio parameter (signal to noiseratio parameter).

After step SA2 and step SA3 individually finish, also comprise a step SA4, promptly export an optical image and a numeral reduction image.

Please refer to Fig. 4, is the calcspar of expression second embodiment of the invention.Present embodiment explanation optical module 3A carries out design optimization individually and individually; Its step comprises:

Step SF1: produce at least two optics point spread function PO1, PO2 from optical module 3A; And

Step SF2: by analyzing at least two optics point spread function PO1, the PO2 that optical module 3A produces, so that optical module 3A is carried out optimization.

In step SF1, can utilize different object distances or different position to produce different optics point spread functions.

The similarity that step SF2 utilizes optics point spread function relatively whether greater than, equal critical value T (step SF3), if greater than, equal a critical value T person, promptly export optical results, for example optical parametric (step SF4), if less than critical value T person, i.e. repeating step SF1 (step SF5).

And in step SF2, the method for its analysis comprises the fuzzy minimum value of comparison optics point spread function.

Please refer to Fig. 5, is the calcspar of expression third embodiment of the invention.Present embodiment explanation image reduction module 3B carries out design optimization individually and individually; Its step comprises:

Step SG1: produce at least two image reduction point spread function PI1, PI2 from image reduction module 3B; And

Step SG2: by analyzing at least two image reduction point spread function PI1, the PI2 that image reduction module 3B produces, so that image reduction module 3B is carried out optimization.

In step SG1, can utilize different noises (noise) to produce different image reduction point spread functions.

The similarity that step SG2 utilizes image reduction point spread function relatively whether greater than, equal critical value T (step SG3), if more than or equal to a critical value T person, it is the image output reduction result, for example regulate and control parameter value (step SG4), if less than critical value T person, i.e. repeating step SG1 (step SG5).

And in step SG2, also comprise the fuzzy minimum value of comparison image reduction point spread function.

Please refer to Fig. 6, is the calcspar of expression four embodiment of the invention.Present embodiment explanation optical module 3A arranges in pairs or groups with image reduction module 3B after design optimization is finished individually and individually again; Its step comprises:

Step SD1: provide a fixing image reduction point spread function PIF by digitized video recovery module 3B;

Step SD2: produce an optics point spread function PO by optical module 3A;

Step SD3: the similarity of optics point spread function PO and fixing image reduction point spread function PIF relatively;

Step SD4: when the similarity of optics point spread function PO and fixing image reduction point spread function PIF is equal to or greater than a critical value T, the parameter of output optical module 3A; And

Step SD5: when the similarity of optics point spread function PO and fixing image reduction point spread function PIF during less than critical value T, with optical module 3A optimization and repeating step SD2.

In step SD3, except the similarity of optics point spread function relatively and fixing image reduction point spread function, also comprise the fuzzy minimum value of comparison optics point spread function and fixing image reduction point spread function.

And the parameter of being exported in step SD4 comprises a refractive index, a curvature, an one-tenth-value thickness 1/10 and an asphericity coefficient, perhaps its combination.

Please refer to Fig. 7, is the calcspar of expression fifth embodiment of the invention.Present embodiment explanation image reduction module 3B after finish individually and individually by design optimization, arranges in pairs or groups with optical module 3A again; Its step comprises:

Step SE1: provide a fixing optics point spread function POF by optical module 3A;

Step SE2: produce an image reduction point spread function PI by digitized video recovery module 3B;

Step SE3: the similarity of Gu Ding optics point spread function POF and image reduction point spread function PI relatively;

Step SE4: when the similarity of fixing optics point spread function POF and image reduction point spread function PI is equal to or greater than a critical value T, the parameter of output digitized video recovery module 3B; And

Step SE5:, digitized video recovery module 3B is carried out optimization and repeating step SE2 when the similarity of fixing optics point spread function POF and image reduction point spread function PI during less than critical value.

In step SE3, except the similarity of image reduction point spread function relatively and fixing optics point spread function, also comprise the fuzzy minimum value of comparison image reduction point spread function and fixing optics point spread function.

And the parameter of being exported in step SE4 comprises regulation and control parameter, a regularization parameter and a signal noise ratio parameter, perhaps its combination.

Please refer to Fig. 8, is the calcspar of expression sixth embodiment of the invention.The present embodiment explanation is because therefore the modularization of optical module and digitized video module can carry out the exchange of module.In the present embodiment, comprise having one first optical module MO1 and one first image reduction module MI1, and have one second optical module MO2 and one second image reduction module MI2; The step of present embodiment comprises:

Step SK1: choose an optical module MO1 or a MO2 wherein, and obtain at least one optics point spread function PO of selected optical module MO1 or MO2;

Step SK2: choose an image reduction module MI1 or a MI2 wherein, and obtain at least one image reduction point spread function PI of selected image reduction module MI1 or MI2; And

Step SK3: the similarity of analyzing the image reduction point spread function PI of the optics point spread function PO of selected optical module MO1 or MO2 and selected image reduction module MI1 or MI2 respectively or in order, and, optical module MO1 or MO1 are formed an IS of digital optical imaging system with image reduction module MI1 or MI2 according to a predetermined critical value T.

Know clearly it, produce one first optics point spread function from first optical module, produce one second optics point spread function from second optical module, export one first image reduction point spread function from the first image reduction module, export one second image reduction point spread function from the second image reduction module; Compare the similarity of the first optics point spread function and the first image reduction point spread function again, and compare the similarity of the second optics point spread function and the second image reduction point spread function.

Therefore, when both similarity reaches a predetermined critical value, represent that promptly first optical module is extremely closely identical with the optical property of second optical module, meaning is that first optical module and second optical module get final product mutual alternative, so can reach the purpose of modularization individual matches.Moreover compared to prior art, the present invention can replace with the optical module of same size separately, and need not replace total system, to save cost.

Please refer to Fig. 9, is the calcspar that expression the present invention is applied to software product.This Figure illustrates the digital optical imaging method for designing, it is by the design of at least one computing machine (as software product 4) realization digital optical imaging, and this imaging method for designing comprises:

Step SH1: modularization one digital imaging system comprises some optics variable-definitions;

Step SH2: by the similarity of point spread function, the optical property of optimization digit optical system; And

Step SH3: via optimization and repeating step SH1, to revise the optics variable.

Wherein, in step SH1, the digital imaging system module changes into an optical module and with the picture recovery module; Wherein, the optics variable comprises an optical module variable and an image reduction module variable, and the variable of optical module comprises the refractive index of an optical module, the size of an optical module, thickness, wavelength and the Abbe number (Abbe-number) etc. of an optical module; And the variable of image reduction comprises filter parameter, regularization parameter and signal noise ratio parameter etc.

Please also refer to Figure 10 and Figure 11, represent that respectively optimization of the present invention is forward and backward, with Doublet software simulation result's curve map.And Figure 12 is the tabulation figure of expression analog parameter variable of the present invention.Imaging system with Doublet is an example, design object is for being desirably on the focal plane, in the focal depth range of each 0.2mm of front and back, with the parameter shown in Figure 12 is example, input light radius (Ent beam radius) is fixed as 6.25, rink corner degree (field angle) is 5.7296e-05, predominant wavelength (Primary wavln) is 0.587560, therefore variable comprises the radius (RADIUS) of eyeglass, thickness (THICKNESS) and pore size (APERTURERADIUS) etc., after through calculating, the similarity degree (as shown in figure 11) of its point spread function, for traditional optical system (as shown in figure 10), all can be greater than 0.8.

Therefore,, can reach the modularization digital imaging system, promptly be divided into an optical module and an image reduction module, by the similarity and the fuzzy minimum value of point spread function, to obtain the standard of objectivity by above-mentioned structure and method; And optical module and/or image reduction module can be individually and are individually carried out optimization, mate mutually, to reduce the time that image calculates again; And can replace the optical module that reaches identical performance mutually, and need not replace total system, to save cost.

Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims (13)

1. the method for designing of a digital optical imaging is characterized in that, step comprises:

D1. provide a fixing image reduction point spread function by a digitized video recovery module;

D2. produce an optics point spread function by an optical module;

D3. the similarity of this optics point spread function and image reduction point spread function that should be fixing relatively;

D4. when this optics point spread function is equal to or greater than a critical value with the similarity of being somebody's turn to do fixing image reduction point spread function, export the parameter of this optical module; And

D5. when the similarity of this optics point spread function and image reduction point spread function that should be fixing during, optimize this optical module and repeating step D2 less than this critical value.

2. the method for designing of digital optical imaging according to claim 1 is characterized in that, this step D3 comprises that also relatively this optics point spread function minimizes with the blur level of being somebody's turn to do fixing image reduction point spread function.

3. the method for designing of digital optical imaging according to claim 1 is characterized in that, the parameter of this optical module comprises a refractive index, a curvature value, an one-tenth-value thickness 1/10 and asphericity coefficient at least.

4. the method for designing of a digital optical imaging is characterized in that, step comprises:

E1. provide a fixing optics point spread function by an optical module;

E2. produce an image reduction point spread function by a digitized video recovery module;

E3. relatively be somebody's turn to do the fixing optics point spread function and the similarity of this image reduction point spread function;

E4. when the similarity of this fixing optics point spread function and this image reduction point spread function is equal to or greater than a critical value, export the parameter of this digitized video recovery module; And

E5. when the similarity of this fixing optics point spread function and this image reduction point spread function during, optimize this digitized video recovery module and repeat step e 2 less than this critical value.

5. the method for designing of digital optical imaging according to claim 4 is characterized in that, this step e 3 comprises that also relatively being somebody's turn to do the fixing optics point spread function and the blur level of this image reduction point spread function minimizes.

6. the method for designing of digital optical imaging according to claim 4 is characterized in that, the parameter of this digitized video recovery module comprises a regulation and control parameter value at least.

7. the method for designing of a digital optical imaging is characterized in that, step comprises:

F1. produce at least two optics point spread functions by an optical module;

F2. the similarity that compares these optics point spread functions;

F3. when the similarity of these optics point spread functions is equal to or greater than a critical value, export the parameter of this optical module; And

F4. when the similarity of these optics point spread functions during, optimize this optical module and repeat step F 1 less than this critical value.

8. the method for designing of digital optical imaging according to claim 7 is characterized in that, this step F 2 comprises that also the blur level of these optics point spread functions of comparison minimizes.

9. the method for designing of digital optical imaging according to claim 7 is characterized in that, the parameter of this optical module comprises a refractive index, a curvature value, an one-tenth-value thickness 1/10 and asphericity coefficient at least.

10. the method for designing of a digital optical imaging is characterized in that, step comprises:

G1. produce at least two image reduction point spread functions by a digitized video recovery module;

G2. the similarity that compares these image reduction point spread functions;

G3. when the similarity of these image reduction point spread functions is equal to or greater than a critical value, export the parameter of this digitized video recovery module; And

G4. when the similarity of these image reduction point spread functions during, optimize this digitized video recovery module and repeating step G1 less than this critical value.

11. the method for designing of digital optical imaging according to claim 10 is characterized in that, this step G2 comprises that also the blur level of these image reduction point spread functions of comparison minimizes.

12. the method for designing of digital optical imaging according to claim 10 is characterized in that, the parameter of this digitized video recovery module comprises a regulation and control parameter value at least.

13. a digital optical imaging method for designing is used for the design by at least one computer realization digital optical imaging, it is characterized in that, this imaging method for designing comprises the following steps:

H1. modularization one digital imaging system becomes an optical module and an image reduction module, and defines a plurality of optics variablees;

H2. the similarity of the point spread function of the point spread function by this optical module and/or this image reduction module, the optical property of this digit optical system of optimization; And

H3. via this optical module of optimization and/or this image reduction module, revising the optics variable, and repeating step H1.

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