CN103728121B - Multifunctional optical lens parameters detecting instrument and detection method thereof - Google Patents
Multifunctional optical lens parameters detecting instrument and detection method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of optical lens parameter detection instrument and detection method thereof, particularly a kind of multifunctional optical lens parameters detecting instrument and detection method thereof, belong to optical detecting instrument field.A kind of multifunctional optical lens parameters detecting instrument, it comprises bearing and is installed on tested lens assembly and the Digital Video at bearing two ends respectively; Described bearing is also provided with the intelligent image treating apparatus be connected with Digital Video with Treatment Analysis image information; Described Digital Video exports to the image information of intelligent image treating apparatus for nothing compression movable number video image information.Multifunctional optical lens parameters detecting instrument of the present invention can not only realize the quick detection of multiple optical parametric on a small-sized equipment, and measuring accuracy can meet the requirement of current security protection industry, therefore both greatly reduce the cost of detecting instrument, in turn save the space resources shared by multiple detecting instrument.
Description
Technical field
The present invention relates to a kind of optical lens parameter detection instrument and detection method thereof, particularly a kind of multifunctional optical lens parameters detecting instrument and detection method thereof, belong to optical detecting instrument field.
Background technology
In prior art, be all adopt different equipment to detect to optical parametrics such as the focal length of optical lens, infrared out of focus, throughput, equivalent effective apertures.The equipment that the detection of each parameter needs outfit one special, wherein a lot of equipment is expensive, and middle-size and small-size optical lens factory and video camera producer cannot bear.In addition, these equipment are mostly confined to laboratory or sampling Detection uses, and do not consider that the easy and simple to handle and detection required for online equipment is quick.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention proposes a kind of multifunctional optical lens parameters detecting instrument and detection method thereof, multifunctional optical lens parameters detecting instrument of the present invention can not only realize the quick detection of multiple optical parametric on a small-sized equipment, and measuring accuracy can meet the requirement of current security protection industry, therefore the cost of detecting instrument had both been greatly reduced, in turn save the space resources shared by multiple detecting instrument, in addition, multifunctional optical lens parameters detecting instrument of the present invention and detection method thereof also have is not strict with working environment, the advantage such as easy and simple to handle.
Object of the present invention is achieved by the following technical programs:
One) scheme one
A kind of multifunctional optical lens parameters detecting instrument, it comprises bearing and is installed on tested lens assembly and the Digital Video at bearing two ends respectively; Described bearing is also provided with the intelligent image treating apparatus be connected with Digital Video with Treatment Analysis image information; Described Digital Video exports to the image information of intelligent image treating apparatus for nothing compression movable number video image information;
Described tested lens assembly comprises tested camera lens installing sleeve for installing tested camera lens, movable sleeve is placed in graticule cylinder in tested camera lens installing sleeve body, be used for the graticule cylinder adjustment handwheel driving the relatively tested camera lens installing sleeve of graticule cylinder to move axially and the backlight, homogenize plate and the graticule that are fixedly installed in respectively in graticule cylindrical shell;
The optical lens of described backlight, homogenize plate, graticule, tested camera lens, Digital Video and imageing sensor to be centrally located on same optical axis and each parts are arranged in order along optical axis bearing of trend; Described graticule is distributed with the multiple tracks parallel lines arranged at equal intervals successively.
Described tested lens assembly also comprises and is fixedly arranged on straight-line displacement on graticule cylinder outer tube wall and measures label, be positioned at the straight-line displacement of detection of straight lines displacement measurement label of being used for of graticule cylinder side and measure camera lens, be located at straight-line displacement that straight-line displacement measures camera lens and measure straight-line displacement survey sensor on label imaging plane and processing module thereof, and straight-line displacement is measured camera lens and straight-line displacement survey sensor and processing module thereof and is fixedly installed on bearing.
Described bearing comprises base, the perpendicular lifting guide pole be placed on base, to be positioned at above base and movable sleeve is placed in the movable bearing support on lifting guide pole and is used for adjusting the lift adjustment knob of movable bearing support OQ t guide pole height and position, described tested lens assembly is installed on base, and described Digital Video is installed on movable bearing support;
Described bearing is also provided with display screen, and described intelligent image treating apparatus is connected output information with display screen.
Two) scheme two
A method for optical lens parameter detection instrument detecting optical lens focus described in scheme one,
Described method comprises the following steps:
1) position that the focusing ring rotating Digital Video indicates to infinite distance, now object distance is infinite distance, tested camera lens is positioned over the detection position of tested camera lens installing sleeve, control backlight is luminous, make light by homogenize plate uniform irradiation on graticule, make the pattern of graticule form graticule image by tested camera lens and Digital Video, and be transferred to intelligent image treating apparatus;
2) drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially by graticule cylinder adjustment handwheel, thus adjust the position of the relatively tested camera lens of graticule in graticule cylinder; Judge the sharpness of graticule image by intelligent image treating apparatus simultaneously, find out graticule image the most clearly, and according to the spacing d1 of adjacent two lines on this graticule of graticule image calculating the most clearly image;
3) according to the focal distance f 2:f2=f1*d2/d1 of the tested camera lens of following formulae discovery, wherein d2 is the spacing of adjacent two lines on graticule, and f1 is the lens focus of Digital Video.
Three) scheme three
The infrared through focus value of the optical lens parameter detection instrument detecting optical camera lens described in scheme one and a method for infrared sharpness drop-out value,
Described method comprises the following steps:
1) position that the focusing ring rotating Digital Video indicates to infinite distance, now object distance is infinite distance, tested camera lens is positioned over the detection position of tested camera lens installing sleeve, control backlight and send visible ray, make light by homogenize plate uniform irradiation on graticule, the pattern of graticule is made to form graticule image by tested camera lens, Digital Video, and be transferred to intelligent image treating apparatus;
2) straight-line displacement is set on graticule cylinder outer tube wall and measures label, the bearing of graticule cylinder side is arranged and is used for the straight-line displacement of detection of straight lines displacement measurement label and measures camera lens and be located at straight-line displacement and measure straight-line displacement survey sensor on camera lens focal plane and processing module thereof;
3) drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially by graticule cylinder adjustment handwheel, thus adjust the position of the relatively tested camera lens of graticule in graticule cylinder; Judged the sharpness of graticule image by intelligent image treating apparatus simultaneously, find out graticule image the most clearly, record definition values K1 now, and measure camera lens and straight-line displacement survey sensor and processing module detection thereof straight-line displacement measurement label position P1 now by straight-line displacement;
4) control backlight and send infrared light, by intelligent image treating apparatus record definition values K2 now; Finely tune graticule cylinder adjustment handwheel afterwards, until graticule image the most clearly found out by intelligent image treating apparatus, measure camera lens and straight-line displacement survey sensor and processing module detection straight-line displacement now thereof by straight-line displacement and measure label position P2;
5) by infrared through focus value and the infrared sharpness drop-out value of the tested camera lens of following formulae discovery:
Infrared through focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
Four) scheme four
A method for the throughput of the optical lens parameter detection instrument detecting optical camera lens described in scheme one,
Described method comprises the following steps:
1) the fixing time shutter of Digital Video is set, the position that the focusing ring rotating Digital Video indicates to infinite distance;
2) when not yet tested camera lens being positioned over tested camera lens installing sleeve, controlling backlight luminous, being calculated the maximum brightness value B1 of Digital Video output signal by intelligent image treating apparatus;
3) first tested camera lens is positioned over the detection position of tested camera lens installing sleeve, backlight is made to keep luminous, make light by homogenize plate uniform irradiation on graticule, make the pattern of graticule form graticule image by tested camera lens and Digital Video, and be transferred to intelligent image treating apparatus;
Then drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially by graticule cylinder adjustment handwheel, thus adjust the position of the relatively tested camera lens of graticule in graticule cylinder; Judged the sharpness of graticule image simultaneously by intelligent image treating apparatus, find out graticule image the most clearly, according to the spacing d1 of adjacent two lines on this graticule of graticule image calculating the most clearly image;
Afterwards according to the focal distance f 2:f2=f1*d2/d1 of the tested camera lens of following formulae discovery, wherein d2 is the spacing of adjacent two lines on graticule, and f1 is the lens focus of Digital Video;
4) in the adjustment process of step 3, when the imaging in Digital Video be in the most clearly graticule image time, calculated the maximum brightness value B2 of now Digital Video output signal by intelligent image treating apparatus;
5) according to the logical backscatter extinction logarithmic ratio T:T=B2/B1* (N/f2) of the tested camera lens of following formulae discovery
2, N is a long measure of setting;
6) judge their throughput according to the logical backscatter extinction logarithmic ratio of multiple tested camera lens, logical backscatter extinction logarithmic ratio T is larger, and the throughput of corresponding tested camera lens is higher.
Five) scheme five
The method of the equivalent effective aperture of the optical lens parameter detection instrument detecting optical camera lens described in a kind of scheme one, described Digital Video is arranged on the perpendicular lifting guide pole be placed in above base by a movable bearing support, is provided with the lift adjustment knob for adjustment movable bearing support OQ t guide pole height and position between movable bearing support and lifting guide pole; Described intelligent image treating apparatus is connected with display screen;
Described method comprises the following steps:
1) position of focusing ring to most proximal end mark of Digital Video is rotated;
2) tested camera lens is positioned over the detection position of tested camera lens installing sleeve, controls backlight luminous;
3) relative position of Digital Video and tested camera lens is adjusted by lift adjustment knob, the tested Lens Entrance Pupil image that display screen is shown from fuzzy to clear again to fuzzy, judged the definition values of tested Lens Entrance Pupil image by intelligent image treating apparatus in above-mentioned adjustment process, find out the most tested Lens Entrance Pupil image, and according to this most tested Lens Entrance Pupil image calculate pixel quantity, draw the image pixel point quantitative value N1 of entrance pupil;
4) according to the equivalent effective aperture D1 of the tested camera lens of following formulae discovery:
D1＝2*P1*f1/L1*sqrt(N1/π)；
Wherein, f1 is the lens focus of Digital Video, and L1 is the Focusing mechanism stroke of Digital Video.
L1 is also when the lens focusing of Digital Video is in the most nearby time, the camera lens focal plane of Digital Video and the distance of image sensor plane.Shape due to the effective diaphragm of tested camera lens may be circular or irregular similar polygon, and entrance pupil is the imaging of effective diaphragm at object space of tested camera lens, so the shape of entrance pupil is also circular or irregular similar polygon.When the area of the circle that diameter is D is equal to the area of surveyed entrance pupil, we can say that D is exactly the equivalent effective aperture of this entrance pupil.
Through demarcating in advance, known:
Digital Video image sensor pixel spacing=P1
Lens focus=the f1 of Digital Video
When the lens focusing of Digital Video is in the most nearby time, the camera lens focal plane of Digital Video and the distance=L1 of image sensor plane
Through step 3) measure obtain:
The image pixel point quantitative value N1 of entrance pupil
Can calculate:
The imaging area S1=N1*P12 of entrance pupil in Digital Video
Area S2=S1* (f1/L1) 2=N1* (P1*f1/L1) 2 of actual entrance pupil
Equivalence effective aperture D1=2*sqrt (S2/ π)=2*P1* (f1/L1) * sqrt (N1/ π).
The imaging area S1=N1*P1 of entrance pupil on video camera
2
The area S2=S1* (f1/L1) of actual entrance pupil
2=N1* (P1*f1/L1)
2
Equivalence effective aperture D1=2*sqrt (S2/ π)=2*P1*f1/L1*sqrt (N1/ π)
The present invention compared with prior art, has the following advantages and effect:
1) on a mini-plant, realize the optical lens many kinds of parameters measuring ability that could be realized by multiple equipment at present, greatly reduce the buying expenses of user;
2) really realize the detection speed of online equipment, adapt to the beat of production line, easily accomplish the full inspection of each product, and less demanding to environment;
3) use intelligentized image computing technique, compare the equipment of end user's part work and part study number, as projector survey resolution, classic method survey non-circular effective aperture etc., precision and stability greatly improves.
Accompanying drawing explanation
Fig. 1 is the structure side view of multifunctional optical lens parameters detecting instrument of the present invention;
Fig. 2 is the structure front view of multifunctional optical lens parameters detecting instrument of the present invention;
Fig. 3 is the isoparametric index path of infrared out of focus utilizing multifunctional optical lens parameters detecting instrument detecting optical camera lens of the present invention;
Fig. 4 is the index path of the equivalent effective aperture utilizing multifunctional optical lens parameters detecting instrument detecting optical camera lens of the present invention;
In figure, Reference numeral is expressed as:
1-1: base, 1-2: lifting guide pole, 1-3: movable bearing support, 1-4: lift adjustment knob, 1-5: side seat, 2-1: tested camera lens, 2-2: tested camera lens installing sleeve, 2-3: graticule cylinder, 2-4: graticule cylinder adjustment handwheel, 2-5: backlight, 2-6: homogenize plate, 2-7: graticule, 2-8: label is measured in straight-line displacement, 2-9: camera lens is measured in straight-line displacement, 2-10: straight-line displacement survey sensor and processing module thereof, 3-1: Digital Video, 4-1: intelligent image treating apparatus, 4-2: display screen.
Embodiment
In order to make content of the present invention be more likely to be clearly understood, below according to the specific embodiment of the present invention also by reference to the accompanying drawings, the present invention is further detailed explanation:
One, embodiment one
A kind of multifunctional optical lens parameters detecting instrument, it comprises bearing and is installed on tested lens assembly and the Digital Video 3-1 at bearing two ends respectively; Described bearing is also provided with the intelligent image treating apparatus 4-1 be connected with Digital Video 3-1 with Treatment Analysis image information; Described Digital Video 3-1 exports to the image information of intelligent image treating apparatus 4-1 for nothing compression movable number video image information;
Described tested lens assembly comprises tested camera lens installing sleeve 2-2 for installing tested camera lens 2-1, movable sleeve is placed in graticule cylinder 2-3 in tested camera lens installing sleeve 2-2 body, be used for the graticule cylinder adjustment handwheel 2-4 driving graticule cylinder 2-3 relatively tested camera lens installing sleeve 2-2 to move axially and the backlight 2-5, homogenize plate 2-6 and the graticule 2-7 that are fixedly installed in respectively in graticule cylinder 2-3 body;
The optical lens of described backlight 2-5, homogenize plate 2-6, graticule 2-7, tested camera lens 2-1, Digital Video 3-1 and imageing sensor to be centrally located on same optical axis and each parts are arranged in order along optical axis bearing of trend; Described graticule 2-7 is distributed with the multiple tracks parallel lines arranged at equal intervals successively.
Described tested lens assembly also comprises and is fixedly arranged on straight-line displacement on graticule cylinder 2-3 outer tube wall and measures label 2-8, be positioned at the straight-line displacement of detection of straight lines displacement measurement label 2-8 of being used for of graticule cylinder 2-3 side and measure camera lens 2-9, be located at straight-line displacement that straight-line displacement measures camera lens 2-9 and measure straight-line displacement survey sensor on label 2-8 imaging plane and processing module 2-10 thereof, and straight-line displacement is measured camera lens 2-9 and straight-line displacement survey sensor and processing module 2-10 thereof and is fixedly installed on bearing.
Described bearing comprises base 1-1, the perpendicular lifting guide pole 1-2 be placed on base 1-1, to be positioned at above base 1-1 and movable sleeve is placed in the movable bearing support 1-3 on lifting guide pole 1-2 and is used for adjusting the lift adjustment knob 1-4 of movable bearing support 1-3 OQ t guide pole 1-2 height and position, described tested lens assembly is installed on base 1-1, and described Digital Video 3-1 is installed on movable bearing support 1-3;
Described bearing is also provided with display screen 4-2, and described intelligent image treating apparatus 4-1 is connected output information with display screen 4-2.
Two, embodiment two
A method for optical lens parameter detection instrument detecting optical lens focus described in embodiment one,
Described method comprises the following steps:
1) position that the focusing ring rotating Digital Video 3-1 indicates to infinite distance, now object distance is infinite distance, tested camera lens 2-1 is positioned over the detection position of tested camera lens installing sleeve 2-2, control backlight 2-5 luminous, make light by homogenize plate 2-6 uniform irradiation on graticule 2-7, make the pattern of graticule 2-7 form graticule image by tested camera lens 2-1 and Digital Video 3-1, and be transferred to intelligent image treating apparatus 4-1;
2) drive graticule cylinder 2-3 relatively tested camera lens installing sleeve 2-2 to move axially by graticule cylinder adjustment handwheel 2-4, thus adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; Judge the sharpness of graticule image by intelligent image treating apparatus 4-1 simultaneously, find out graticule image the most clearly, and according to the spacing d1 of adjacent two lines on this graticule of graticule image calculating the most clearly image;
3) according to the focal distance f 2:f2=f1*d2/d1 of the tested camera lens 2-1 of following formulae discovery, wherein d2 is the spacing of adjacent two lines on graticule 2-7, and f1 is the lens focus of Digital Video 3-1.
Three, embodiment three
The infrared through focus value of the optical lens parameter detection instrument detecting optical camera lens described in embodiment one and a method for infrared sharpness drop-out value,
Described method comprises the following steps:
1) position that the focusing ring rotating Digital Video 3-1 indicates to infinite distance, now object distance is infinite distance, tested camera lens 2-1 is positioned over the detection position of tested camera lens installing sleeve 2-2, control backlight 2-5 and send visible ray, make light by homogenize plate 2-6 uniform irradiation on graticule 2-7, make the pattern of graticule 2-7 form graticule image by tested camera lens 2-1, Digital Video 3-1, and be transferred to intelligent image treating apparatus 4-1;
2) straight-line displacement is set on graticule cylinder 2-3 outer tube wall and measures label 2-8, the bearing of graticule cylinder 2-3 side is arranged and is used for the straight-line displacement of detection of straight lines displacement measurement label 2-8 and measures camera lens 2-9 and be located at straight-line displacement and measure straight-line displacement survey sensor on camera lens 2-9 focal plane and processing module 2-10 thereof;
3) drive graticule cylinder 2-3 relatively tested camera lens installing sleeve 2-2 to move axially by graticule cylinder adjustment handwheel 2-4, thus adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; Judged the sharpness of graticule image by intelligent image treating apparatus 4-1 simultaneously, find out graticule image the most clearly, record definition values K1 now, and measure camera lens 2-9 and straight-line displacement survey sensor and processing module 2-10 detection thereof straight-line displacement measurement label 2-8 position P1 now by straight-line displacement;
4) control backlight 2-5 and send infrared light, by intelligent image treating apparatus 4-1 record definition values K2 now; Finely tune graticule cylinder adjustment handwheel 2-4 afterwards, until intelligent image treating apparatus 4-1 finds out graticule image the most clearly, measure camera lens 2-9 and straight-line displacement survey sensor and processing module 2-10 detection straight-line displacement now thereof by straight-line displacement and measure label 2-8 position P2;
5) by infrared through focus value and the infrared sharpness drop-out value of following formulae discovery tested camera lens 2-1:
Infrared through focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
Four, embodiment four
A method for the throughput of the optical lens parameter detection instrument detecting optical camera lens described in embodiment one,
Described method comprises the following steps:
1) the fixing time shutter of Digital Video 3-1 is set, the position that the focusing ring rotating Digital Video 3-1 indicates to infinite distance;
2) when not yet tested camera lens 2-1 being positioned over tested camera lens installing sleeve 2-2, controlling backlight 2-5 luminous, being calculated the maximum brightness value B1 of Digital Video 3-1 output signal by intelligent image treating apparatus 4-1;
3) first tested camera lens 2-1 is positioned over the detection position of tested camera lens installing sleeve 2-2, backlight 2-5 is made to keep luminous, make light by homogenize plate 2-6 uniform irradiation on graticule 2-7, make the pattern of graticule 2-7 form graticule image by tested camera lens 2-1 and Digital Video 3-1, and be transferred to intelligent image treating apparatus 4-1;
Then drive graticule cylinder 2-3 relatively tested camera lens installing sleeve 2-2 to move axially by graticule cylinder adjustment handwheel 2-4, thus adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; Judged the sharpness of graticule image simultaneously by intelligent image treating apparatus 4-1, find out graticule image the most clearly, according to the spacing d1 of adjacent two lines on this graticule of graticule image calculating the most clearly image;
Afterwards according to the focal distance f 2:f2=f1*d2/d1 of the tested camera lens 2-1 of following formulae discovery, wherein d2 is the spacing of adjacent two lines on graticule 2-7, and f1 is the lens focus of Digital Video 3-1;
4) in the adjustment process of step 3, when the imaging on Digital Video 3-1 be in the most clearly graticule image time, calculated the maximum brightness value B2 of now Digital Video 3-1 output signal by intelligent image treating apparatus 4-1;
5) according to the logical backscatter extinction logarithmic ratio T:T=B2/B1* (N/f2) of following formulae discovery tested camera lens 2-1
2, N is a long measure of setting;
6) judge their throughput according to the logical backscatter extinction logarithmic ratio of multiple tested camera lens 2-1, logical backscatter extinction logarithmic ratio T is larger, and the throughput of corresponding tested camera lens 2-1 is higher.
Five, embodiment five
The method of the equivalent effective aperture of the optical lens parameter detection instrument detecting optical camera lens described in a kind of embodiment one, described Digital Video 3-1 is arranged on the perpendicular lifting guide pole 1-2 be placed in above base 1-1 by a movable bearing support 1-3, is provided with the lift adjustment knob 1-4 for adjustment movable bearing support 1-3 OQ t guide pole 1-2 height and position between movable bearing support 1-3 and lifting guide pole 1-2; Described intelligent image treating apparatus 4-1 is connected with display screen 4-2;
Described method comprises the following steps:
1) position of focusing ring to most proximal end mark of Digital Video 3-1 is rotated;
2) tested camera lens 2-1 is positioned over the detection position of tested camera lens installing sleeve 2-2, controls backlight 2-5 luminous;
3) relative position of Digital Video 3-1 and tested camera lens 2-1 is adjusted by lift adjustment knob 1-4, the tested camera lens 2-1 entrance pupil image that display screen 4-2 is shown from fuzzy to clear again to fuzzy, judged the definition values of tested camera lens 2-1 entrance pupil image by intelligent image treating apparatus 4-1 in above-mentioned adjustment process, find out the most tested camera lens 2-1 entrance pupil image, and according to this most tested camera lens 2-1 entrance pupil image calculate pixel quantity, draw the image pixel point quantitative value N1 of entrance pupil;
4) according to the equivalent effective aperture D1 of following formulae discovery tested camera lens 2-1:
D1＝2*P1*f1/L1*sqrt(N1/π)；
Wherein, f1 is the lens focus of Digital Video 3-1, and L1 is the Focusing mechanism stroke of Digital Video 3-1.L1 is also when the lens focusing of Digital Video 3-1 is in the most nearby time, the camera lens focal plane of Digital Video 3-1 and the distance of image sensor plane.Shape due to the effective diaphragm of tested camera lens 2-1 may be circular or irregular similar polygon, and entrance pupil is the imaging of effective diaphragm at object space of tested camera lens 2-1, so the shape of entrance pupil is also circular or irregular similar polygon.When the area of the circle that diameter is D is equal to the area of surveyed entrance pupil, we can say that D is exactly the equivalent effective aperture of this entrance pupil.
Through demarcating in advance, known:
Digital Video 3-1 image sensor pixel spacing=P1
Lens focus=the f1 of Digital Video 3-1
When the lens focusing of Digital Video 3-1 is in the most nearby time, the camera lens focal plane of Digital Video 3-1 and the distance=L1 of image sensor plane
Through step 3) measure obtain:
The image pixel point quantitative value N1 of entrance pupil
Can calculate:
The imaging area S1=N1*P1 of entrance pupil on Digital Video 3-1
2
The area S2=S1* (f1/L1) of actual entrance pupil
2=N1* (P1*f1/L1)
2
Equivalence effective aperture D1=2*sqrt (S2/ π)=2*P1* (f1/L1) * sqrt (N1/ π).
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on basis of the present invention according to above-mentioned principle and spirit, substitute, all should within protection scope of the present invention.
Claims (5)
1. a multifunctional optical lens parameters detecting instrument, is characterized in that:
It comprises bearing and is installed on tested lens assembly and the Digital Video (3-1) at bearing two ends respectively; Described bearing is also provided with the intelligent image treating apparatus (4-1) be connected with Digital Video (3-1) with Treatment Analysis image information; Described Digital Video (3-1) exports to the image information of intelligent image treating apparatus (4-1) for nothing compression movable number video image information;
Described tested lens assembly comprises the tested camera lens installing sleeve (2-2) for installing tested camera lens (2-1), movable sleeve is placed in the graticule cylinder (2-3) in tested camera lens installing sleeve (2-2) body, the backlight (2-5) that the graticule cylinder being used for driving graticule cylinder (2-3) relatively tested camera lens installing sleeve (2-2) to move axially adjusts handwheel (2-4) and is fixedly installed in respectively in graticule cylinder (2-3) body, homogenize plate (2-6) and graticule (2-7),
The optical lens of described backlight (2-5), homogenize plate (2-6), graticule (2-7), tested camera lens (2-1), Digital Video (3-1) and imageing sensor to be centrally located on same optical axis and each parts are arranged in order along optical axis bearing of trend; Described graticule (2-7) is distributed with the multiple tracks parallel lines arranged at equal intervals successively;
Described tested lens assembly also comprises the straight-line displacement be fixedly arranged on graticule cylinder (2-3) outer tube wall and measures label (2-8), be positioned at graticule cylinder (2-3) side be used for detection of straight lines displacement measurement label (2-8) straight-line displacement measure camera lens (2-9), be located at the straight-line displacement survey sensor on straight-line displacement measurement label (2-8) imaging plane of straight-line displacement measurement camera lens (2-9) and processing module (2-10) thereof, straight-line displacement is measured camera lens (2-9) and straight-line displacement survey sensor and processing module (2-10) thereof and is fixedly installed on bearing.
2. multifunctional optical lens parameters detecting instrument according to claim 1, it is characterized in that: described bearing comprises base (1-1), the perpendicular lifting guide pole (1-2) be placed on base (1-1), be positioned at base (1-1) top and movable sleeve is placed in the movable bearing support (1-3) in lifting guide pole (1-2) and is used for adjusting the lift adjustment knob (1-4) of movable bearing support (1-3) OQ t guide pole (1-2) height and position, described tested lens assembly is installed on base (1-1), described Digital Video (3-1) is installed on movable bearing support (1-3),
Described bearing is also provided with display screen (4-2), described intelligent image treating apparatus (4-1) is connected output information with display screen (4-2).
3., by the infrared through focus value of optical lens parameter detection instrument detecting optical camera lens according to claim 1 and a method for infrared sharpness drop-out value, it is characterized in that: described method comprises the following steps:
1) position that the focusing ring rotating Digital Video (3-1) indicates to infinite distance, tested camera lens (2-1) is positioned over the detection position of tested camera lens installing sleeve (2-2), control backlight (2-5) and send visible ray, make light by homogenize plate (2-6) uniform irradiation on graticule (2-7), make the pattern of graticule (2-7) form graticule image by tested camera lens (2-1), Digital Video (3-1), and be transferred to intelligent image treating apparatus (4-1);
2) straight-line displacement is set on graticule cylinder (2-3) outer tube wall and measures label (2-8), the bearing of graticule cylinder (2-3) side is arranged and is used for the straight-line displacement of detection of straight lines displacement measurement label (2-8) and measures camera lens (2-9) and be located at straight-line displacement and measure straight-line displacement survey sensor on camera lens (2-9) focal plane and processing module (2-10) thereof;
3) drive the relatively tested camera lens installing sleeve (2-2) of graticule cylinder (2-3) to move axially by graticule cylinder adjustment handwheel (2-4), thus adjust the position of the relatively tested camera lens (2-1) of graticule (2-7) in graticule cylinder (2-3); Judged the sharpness of graticule image by intelligent image treating apparatus (4-1) simultaneously, find out graticule image the most clearly, record definition values K1 now, and measure camera lens (2-9) and straight-line displacement survey sensor and processing module (2-10) detection thereof straight-line displacement measurement label (2-8) position P1 now by straight-line displacement;
4) control backlight (2-5) and send infrared light, by intelligent image treating apparatus (4-1) record definition values K2 now; Finely tune graticule cylinder adjustment handwheel (2-4) afterwards, until graticule image the most clearly found out by intelligent image treating apparatus (4-1), measure camera lens (2-9) and straight-line displacement survey sensor and processing module (2-10) detection straight-line displacement now thereof by straight-line displacement and measure label (2-8) position P2;
5) by infrared through focus value and the infrared sharpness drop-out value of the tested camera lens of following formulae discovery (2-1):
Infrared through focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
4., by a method for the throughput of optical lens parameter detection instrument detecting optical camera lens according to claim 1, it is characterized in that: described method comprises the following steps:
1) the fixing time shutter of Digital Video (3-1) is set, the position that the focusing ring rotating Digital Video (3-1) indicates to infinite distance;
2) when not yet tested camera lens (2-1) being positioned over tested camera lens installing sleeve (2-2), control backlight (2-5) luminous, calculate by intelligent image treating apparatus (4-1) the maximum brightness value B1 that Digital Video (3-1) outputs signal;
3) first tested camera lens (2-1) is positioned over the detection position of tested camera lens installing sleeve (2-2), backlight (2-5) is made to keep luminous, make light by homogenize plate (2-6) uniform irradiation on graticule (2-7), make the pattern of graticule (2-7) form graticule image by tested camera lens (2-1) and Digital Video (3-1), and be transferred to intelligent image treating apparatus (4-1);
Then drive the relatively tested camera lens installing sleeve (2-2) of graticule cylinder (2-3) to move axially by graticule cylinder adjustment handwheel (2-4), thus adjust the position of the relatively tested camera lens (2-1) of graticule (2-7) in graticule cylinder (2-3); Judged the sharpness of graticule image simultaneously by intelligent image treating apparatus (4-1), find out graticule image the most clearly, according to the spacing d1 of adjacent two lines on this graticule of graticule image calculating the most clearly image;
Afterwards according to the focal distance f 2:f2=f1*d2/d1 of the tested camera lens of following formulae discovery (2-1), wherein d2 is the spacing of upper adjacent two lines of graticule (2-7), and f1 is the lens focus of Digital Video (3-1);
4) in step 3) adjustment process in, when the imaging in Digital Video (3-1) be in the most clearly graticule image time, calculate by intelligent image treating apparatus (4-1) the maximum brightness value B2 that now Digital Video (3-1) outputs signal;
5) according to the logical backscatter extinction logarithmic ratio T:T=(B2/B1) * (N/f2) of the tested camera lens of following formulae discovery (2-1)
2, N is a long measure of setting;
6) judge their throughput according to the logical backscatter extinction logarithmic ratio of multiple tested camera lens (2-1), logical backscatter extinction logarithmic ratio T is larger, and the throughput of corresponding tested camera lens (2-1) is higher.
5. the method with the equivalent effective aperture of optical lens parameter detection instrument detecting optical camera lens according to claim 1, it is characterized in that: described Digital Video (3-1) is arranged on the perpendicular lifting guide pole (1-2) being placed in base (1-1) top by a movable bearing support (1-3), is provided with the lift adjustment knob (1-4) for adjustment movable bearing support (1-3) OQ t guide pole (1-2) height and position between movable bearing support (1-3) and lifting guide pole (1-2); Described intelligent image treating apparatus (4-1) is connected with display screen (4-2);
Described method comprises the following steps:
1) position of focusing ring to most proximal end mark of Digital Video (3-1) is rotated;
2) tested camera lens (2-1) is positioned over the detection position of tested camera lens installing sleeve (2-2), controls backlight (2-5) luminous;
3) relative position of Digital Video (3-1) and tested camera lens (2-1) is adjusted by lift adjustment knob (1-4), tested camera lens (2-1) the entrance pupil image that display screen (4-2) is shown from fuzzy to clear again to fuzzy, judged the definition values of tested camera lens (2-1) entrance pupil image by intelligent image treating apparatus (4-1) in above-mentioned adjustment process, find out the most tested camera lens (2-1) entrance pupil image, and according to this pixel of the most tested camera lens (2-1) entrance pupil image calculating quantity, draw the image pixel point quantitative value N1 of entrance pupil,
4) according to the equivalent effective aperture D1 of the tested camera lens of following formulae discovery (2-1):
D1＝2*P1*(f1/L1)*sqrt(N1/π)；
Wherein, P1 is Digital Video (3-1) image sensor pixel spacing, and f1 is the lens focus of Digital Video (3-1), and L1 is the Focusing mechanism stroke of Digital Video (3-1).
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| CN104122078B (en) * | 2014-08-08 | 2017-01-18 | 中国科学院光电技术研究所 | Evaluation method for image quality of near-to-eye display optical lens |
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| CN110617949B (en) * | 2019-10-25 | 2024-05-14 | 福州锐景达光电科技有限公司 | Object image unit device and object image adjusting method |
| CN111272397A (en) * | 2020-04-03 | 2020-06-12 | 苏州东辉光学有限公司 | Device and method for measuring relative aperture of photographic objective lens |
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