CN103728121A - Multifunctional optical lens parameter detection instrument and method - Google Patents
Multifunctional optical lens parameter detection instrument and method Download PDFInfo
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- CN103728121A CN103728121A CN201310753434.4A CN201310753434A CN103728121A CN 103728121 A CN103728121 A CN 103728121A CN 201310753434 A CN201310753434 A CN 201310753434A CN 103728121 A CN103728121 A CN 103728121A
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Abstract
The invention relates to an optical lens parameter detection instrument and method, in particular to a multifunctional optical lens parameter detection instrument and method, and belongs to the field of optical detection instruments. The multifunctional optical lens parameter detection instrument comprises a support, a detected lens component and a digital video camera, wherein the detected lens component and the digital video camera are installed at the two ends of the support. The support is further provided with an intelligent image processor which is connected with the digital video camera to process and analyze image information, wherein the image information output by the digital video camera to the intelligent image processor is uncompressed active digital video image information. According to the multifunctional optical lens parameter detection instrument, rapid detection of various optical parameters can be realized on one small device, measurement accuracy can meet the requirements of the security and protection industry, as a result, cost of the detection instrument is lowered greatly, and space resources occupied by various detection instruments are saved.
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, to optical parametrics such as the focal length of optical lens, infrared out of focus, throughput, equivalent effective apertures, be all to adopt different equipment to detect.The detection of each parameter needs to be equipped with a special equipment, and 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 is used, and do not consider that online equipment is needed easy and simple to handle quick with detection.
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 not only can be realized the fast detecting of multiple optical parametric on a small-sized equipment, and measuring accuracy can meet the requirement of current security protection industry, therefore both greatly reduced the cost of detecting instrument, saved again the shared space resources of 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 multifunctional optical lens parameters detecting instrument, tested lens assembly and Digital Video that it comprises bearing and is installed on respectively bearing two ends; On described bearing, be also provided with the intelligent image treating apparatus being connected with Digital Video with Treatment Analysis image information; The image information that described Digital Video is exported to intelligent image treating apparatus is nothing compression movable number video image information;
Described tested lens assembly comprises for tested camera lens installing sleeve, the movable sleeve of tested camera lens is installed and is placed in graticule cylinder in tested camera lens installing sleeve body, is used for driving the axially movable graticule cylinder of the relatively tested camera lens installing sleeve of graticule cylinder adjust handwheel and be fixedly installed in respectively backlight, homogenize plate and the graticule in graticule cylindrical shell;
The optical lens of described backlight, homogenize plate, graticule, tested camera lens, Digital Video and imageing sensor be centered close on same optical axis and each parts are arranged in order along optical axis bearing of trend; On described graticule, be distributed with the multiple tracks parallel lines of uniformly-spaced arranging successively.
Described tested lens assembly also comprises that label is measured in the straight-line displacement that is fixedly arranged on graticule cylinder outer tube wall, the straight-line displacement of detection of straight lines displacement measurement label of being used for that is positioned at graticule cylinder side is measured camera lens, is located at straight-line displacement and measures the straight-line displacement of camera lens and measure straight-line displacement survey sensor and the processing module thereof on label imaging plane, 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, perpendicular be placed in lifting guide pole on base, be positioned at the lift adjustment knob that base top and movable sleeve are placed in the movable bearing support on lifting guide pole and are used for adjusting the relative lifting guide pole of movable bearing support height and position, described tested lens assembly is installed on base, and described standard lens assembly is installed on movable bearing support;
On described bearing, be also provided with display screen, described intelligent image treating apparatus is connected output information with display screen.
Two) scheme two
With the optical lens parameter detection instrument described in scheme one, detect a method for optical lens focal length,
Described method comprises the following steps:
1) rotate the focusing ring of Digital Video to the position of infinite distance sign, now object distance is infinite distance, tested camera lens is positioned over to the detection position of tested camera lens installing sleeve, control backlight is luminous, make light by homogenize plate uniform irradiation to 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) by graticule cylinder, adjust handwheel and drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially, thereby adjust the position of the relatively tested camera lens of graticule in graticule cylinder; By the sharpness of intelligent image treating apparatus judgement graticule image, find out graticule image the most clearly simultaneously, and according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly;
3) according to following formula, calculate the focal distance f 2:f2=f1*d2/d1 of tested camera lens, wherein d2 is the spacing of adjacent two lines on graticule, the lens focus that f1 is Digital Video.
Three) scheme three
With the optical lens parameter detection instrument described in scheme one, detect the infrared out of focus value of optical lens and a method for infrared sharpness drop-out value,
Described method comprises the following steps:
1) rotate the focusing ring of Digital Video to the position of infinite distance sign, now object distance is infinite distance, tested camera lens is positioned over to the detection position of tested camera lens installing sleeve, control backlight and send visible ray, make light by homogenize plate uniform irradiation to graticule, make the pattern of graticule form graticule image, and be transferred to intelligent image treating apparatus by tested camera lens, Digital Video;
2) straight-line displacement is set on graticule cylinder outer tube wall and measures label, on the bearing of graticule cylinder side, arrange and be used for the straight-line displacement of detection of straight lines displacement measurement label and measure camera lens and be located at straight-line displacement and measure straight-line displacement survey sensor and the processing module thereof on camera lens focal plane;
3) by graticule cylinder, adjust handwheel and drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially, thereby adjust the position of the relatively tested camera lens of graticule in graticule cylinder; Simultaneously by the sharpness of intelligent image treating apparatus judgement graticule image, find out graticule image the most clearly, record definition values K1 now, and by straight-line displacement, measure camera lens and straight-line displacement survey sensor and processing module thereof and detect straight-line displacement measurement label position P1 now;
4) control backlight and send infrared light, by intelligent image treating apparatus record definition values K2 now; Finely tune afterwards graticule cylinder and adjust handwheel, until intelligent image treating apparatus is found out graticule image the most clearly, by straight-line displacement, measure camera lens and straight-line displacement survey sensor and processing module thereof and detect straight-line displacement measurement label position P2 now;
5) by following formula, calculate infrared out of focus value and the infrared sharpness drop-out value of tested camera lens:
Infrared out of focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
Four) scheme four
With the optical lens parameter detection instrument described in scheme one, detect a method for the throughput of optical lens,
Described method comprises the following steps:
1) set the fixedly time shutter of Digital Video, rotate the focusing ring of Digital Video to the position of infinite distance sign;
2) when not yet tested camera lens being positioned over to tested camera lens installing sleeve, control backlight luminous, by intelligent image treating apparatus, calculate the maximum brightness value B1 of Digital Video output signal;
3) first tested camera lens is positioned over to the detection position of tested camera lens installing sleeve, make backlight keep luminous, make light by homogenize plate uniform irradiation to graticule, the pattern that makes graticule forms graticule image by tested camera lens and Digital Video, and is transferred to intelligent image treating apparatus;
Then by graticule cylinder, adjust handwheel and drive the relatively tested camera lens installing sleeve of graticule cylinder to move axially, thereby adjust the position of the relatively tested camera lens of graticule in graticule cylinder; By the sharpness of intelligent image treating apparatus judgement graticule image, find out graticule image the most clearly, according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly simultaneously;
According to following formula, calculate afterwards the focal distance f 2:f2=f1*d2/d1 of tested camera lens, wherein d2 is the spacing of adjacent two lines on graticule, the lens focus that f1 is Digital Video;
4), in the adjustment process of step 3, the imaging in Digital Video, when graticule image the most clearly, is calculated the now maximum brightness value B2 of Digital Video output signal by intelligent image treating apparatus;
5) according to following formula, calculate the logical backscatter extinction logarithmic ratio T:T=B2/B1* (N/f2) of tested camera lens
2, the long measure of N for setting;
6) according to logical their throughput of backscatter extinction logarithmic ratio judgement of a plurality of tested camera lenses, logical backscatter extinction logarithmic ratio T is larger, and the throughput of corresponding tested camera lens is higher.
Five) scheme five
A kind of method that detects the equivalent effective aperture of optical lens with the optical lens parameter detection instrument described in scheme one, described Digital Video is arranged on and is erected on the lifting guide pole that is placed in base top by a movable bearing support, is provided with for adjusting the lift adjustment knob of the relative lifting guide pole of movable bearing support 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) rotate the focusing ring of Digital Video to the position of most proximal end sign;
2) tested camera lens is positioned over to the detection position of tested camera lens installing sleeve, controls backlight luminous;
3) by lift adjustment knob, adjust the relative position of Digital Video and tested camera lens, make tested camera lens entrance pupil image that display screen shows from fuzzy to clear again to fuzzy, in above-mentioned adjustment process, by intelligent image treating apparatus, judge the definition values of tested camera lens entrance pupil image, find out the most tested camera lens entrance pupil image, and according to this most tested camera lens entrance pupil image calculation pixel quantity, draw the image pixel point quantitative value N1 of entrance pupil;
4) according to following formula, calculate the equivalent effective aperture D1 of tested camera lens:
D1＝2*P1*f1/L1*sqrt(N1/π)；
Wherein, the lens focus that f1 is Digital Video, the Focusing mechanism stroke that L1 is Digital Video.
L1 be also lens focusing when Digital Video in the most nearby time, the camera lens focal plane of Digital Video and the distance of image sensor plane.Because the shape of the effective diaphragm of tested camera lens may be circular or irregular similar polygon, and entrance pupil is that the effective diaphragm of tested camera lens is in the imaging of object space, so the shape of entrance pupil is also circular or irregular similar polygon.When the diameter circular area that 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:
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 a plurality of equipment at present, greatly reduced user's buying expenses;
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 calculation technology, compare the equipment of end user's part work and part study number, as projector is surveyed resolution, classic method is surveyed 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 utilizes multifunctional optical lens parameters detecting instrument of the present invention to detect the isoparametric index path of infrared out of focus of optical lens;
Fig. 4 utilizes multifunctional optical lens parameters detecting instrument of the present invention to detect the index path of the equivalent effective aperture of optical lens;
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 is adjusted 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
For content of the present invention is more likely to be clearly understood, according to the specific embodiment of the present invention also by reference to the accompanying drawings, the present invention is further detailed explanation below:
One, embodiment one
A multifunctional optical lens parameters detecting instrument, tested lens assembly and Digital Video 3-1 that it comprises bearing and is installed on respectively bearing two ends; On described bearing, be also provided with the intelligent image treating apparatus 4-1 being connected with Digital Video 3-1 with Treatment Analysis image information; The image information that described Digital Video 3-1 exports to intelligent image treating apparatus 4-1 is nothing compression movable number video image information;
Described tested lens assembly comprises for tested camera lens installing sleeve 2-2, the movable sleeve of tested camera lens 2-1 is installed and is placed in graticule cylinder 2-3 in tested camera lens installing sleeve 2-2 body, is used for driving the axially movable graticule cylinder of the relatively tested camera lens installing sleeve of graticule cylinder 2-3 2-2 adjust handwheel 2-4 and be fixedly installed in respectively backlight 2-5, homogenize plate 2-6 and the graticule 2-7 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 be centered close on same optical axis and each parts are arranged in order along optical axis bearing of trend; On described graticule 2-7, be distributed with the multiple tracks parallel lines of uniformly-spaced arranging successively.
Described tested lens assembly also comprises that label 2-8 is measured in the straight-line displacement that is fixedly arranged on graticule cylinder 2-3 outer tube wall, the straight-line displacement of detection of straight lines displacement measurement label 2-8 of being used for that is positioned at graticule cylinder 2-3 side is measured camera lens 2-9, is located at straight-line displacement and measures the straight-line displacement of camera lens 2-9 and measure straight-line displacement survey sensor and the processing module 2-10 thereof on label 2-8 imaging plane, 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, perpendicular be placed in lifting guide pole 1-2 on base 1-1, be positioned at the lift adjustment knob 1-4 that base 1-1 top and movable sleeve are placed in the movable bearing support 1-3 on lifting guide pole 1-2 and are used for adjusting the relative lifting guide pole of movable bearing support 1-3 1-2 height and position, it is upper that described tested lens assembly is installed on base 1-1, and described standard lens assembly is installed on movable bearing support 1-3;
On described bearing, be also provided with display screen 4-2, described intelligent image treating apparatus 4-1 is connected output information with display screen 4-2.
Two, embodiment two
With the optical lens parameter detection instrument described in embodiment one, detect a method for optical lens focal length,
Described method comprises the following steps:
1) rotate the focusing ring of Digital Video 3-1 to the position of infinite distance sign, now object distance is infinite distance, tested camera lens 2-1 is positioned over to 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 to 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) by graticule cylinder, adjust handwheel 2-4 and drive the relatively tested camera lens installing sleeve of graticule cylinder 2-3 2-2 to move axially, thereby adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; By the sharpness of intelligent image treating apparatus 4-1 judgement graticule image, find out graticule image the most clearly simultaneously, and according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly;
3) according to following formula, calculate the focal distance f 2:f2=f1*d2/d1 of tested camera lens 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.
Three, embodiment three
With the optical lens parameter detection instrument described in embodiment one, detect the infrared out of focus value of optical lens and a method for infrared sharpness drop-out value,
Described method comprises the following steps:
1) rotate the focusing ring of Digital Video 3-1 to the position of infinite distance sign, now object distance is infinite distance, tested camera lens 2-1 is positioned over to 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 to 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, on the bearing of graticule cylinder 2-3 side, arrange and be used for the straight-line displacement of detection of straight lines displacement measurement label 2-8 and measure camera lens 2-9 and be located at straight-line displacement and measure straight-line displacement survey sensor and the processing module 2-10 thereof on camera lens 2-9 focal plane;
3) by graticule cylinder, adjust handwheel 2-4 and drive the relatively tested camera lens installing sleeve of graticule cylinder 2-3 2-2 to move axially, thereby adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; Simultaneously by the sharpness of intelligent image treating apparatus 4-1 judgement graticule image, find out graticule image the most clearly, record definition values K1 now, and by straight-line displacement, measure camera lens 2-9 and straight-line displacement survey sensor and processing module 2-10 thereof and detect straight-line displacement measurement label 2-8 position P1 now;
4) control backlight 2-5 and send infrared light, by intelligent image treating apparatus 4-1 record definition values K2 now; Finely tune afterwards graticule cylinder and adjust handwheel 2-4, until intelligent image treating apparatus 4-1 finds out graticule image the most clearly, by straight-line displacement, measure camera lens 2-9 and straight-line displacement survey sensor and processing module 2-10 thereof and detect straight-line displacement measurement label 2-8 position P2 now;
5) by following formula, calculate infrared out of focus value and the infrared sharpness drop-out value of tested camera lens 2-1:
Infrared out of focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
Four, embodiment four
With the optical lens parameter detection instrument described in embodiment one, detect a method for the throughput of optical lens,
Described method comprises the following steps:
1) set the fixedly time shutter of Digital Video 3-1, rotate the focusing ring of Digital Video 3-1 to the position of infinite distance sign;
2) when not yet tested camera lens 2-1 being positioned over to tested camera lens installing sleeve 2-2, control backlight 2-5 luminous, by intelligent image treating apparatus 4-1, calculate the maximum brightness value B1 of Digital Video 3-1 output signal;
3) first tested camera lens 2-1 is positioned over to the detection position of tested camera lens installing sleeve 2-2, make backlight 2-5 keep luminous, make light by homogenize plate 2-6 uniform irradiation to 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 by graticule cylinder, adjust handwheel 2-4 and drive the relatively tested camera lens installing sleeve of graticule cylinder 2-3 2-2 to move axially, thereby adjust the position of the relatively tested camera lens 2-1 of graticule 2-7 in graticule cylinder 2-3; By the sharpness of intelligent image treating apparatus 4-1 judgement graticule image, find out graticule image the most clearly, according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly simultaneously;
According to following formula, calculate afterwards the focal distance f 2:f2=f1*d2/d1 of tested camera lens 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 the adjustment process of step 3, the imaging on Digital Video 3-1, when graticule image the most clearly, is calculated the now maximum brightness value B2 of Digital Video 3-1 output signal by intelligent image treating apparatus 4-1;
5) according to following formula, calculate the logical backscatter extinction logarithmic ratio T:T=B2/B1* (N/f2) of tested camera lens 2-1
2, the long measure of N for setting;
6) according to logical their throughput of backscatter extinction logarithmic ratio judgement of a plurality of 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
A kind of method that detects the equivalent effective aperture of optical lens with the optical lens parameter detection instrument described in embodiment one, described Digital Video 3-1 is arranged on and is erected on the lifting guide pole 1-2 that is placed in base 1-1 top by a movable bearing support 1-3, is provided with for adjusting the lift adjustment knob 1-4 of the relative lifting guide pole of movable bearing support 1-3 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) rotate the focusing ring of Digital Video 3-1 to the position of most proximal end sign;
2) tested camera lens 2-1 is positioned over to the detection position of tested camera lens installing sleeve 2-2, controls backlight 2-5 luminous;
3) by lift adjustment knob 1-4, adjust the relative position of Digital Video 3-1 and tested camera lens 2-1, make tested camera lens 2-1 entrance pupil image that display screen 4-2 shows from fuzzy to clear again to fuzzy, in above-mentioned adjustment process, by intelligent image treating apparatus 4-1, judge the definition values of tested camera lens 2-1 entrance pupil image, 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 calculation pixel quantity, draw the image pixel point quantitative value N1 of entrance pupil;
4) according to following formula, calculate the equivalent effective aperture D1 of 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 be also lens focusing as Digital Video 3-1 in the most nearby time, the camera lens focal plane of Digital Video 3-1 and the distance of image sensor plane.Because the shape of the effective diaphragm of tested camera lens 2-1 may be circular or irregular similar polygon, and entrance pupil is that the effective diaphragm of tested camera lens 2-1 is in the imaging of object space, so the shape of entrance pupil is also circular or irregular similar polygon.When the diameter circular area that 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=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:
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; the above-mentioned principle of every foundation and the improvement of spirit on basis of the present invention, substitute, all should be within protection scope of the present invention.
Claims (7)
1. a multifunctional optical lens parameters detecting instrument, is characterized in that:
Tested lens assembly and Digital Video (3-1) that it comprises bearing and is installed on respectively bearing two ends; On described bearing, be also provided with and be connected the intelligent image treating apparatus (4-1) with Treatment Analysis image information with Digital Video (3-1); The image information that described Digital Video (3-1) is exported to intelligent image treating apparatus (4-1) is nothing compression movable number video image information;
Described tested lens assembly comprises for tested camera lens installing sleeve (2-2), the movable sleeve of tested camera lens (2-1) is installed and is placed in graticule cylinder (2-3) in tested camera lens installing sleeve (2-2) body, is used for driving the axially movable graticule cylinder of the relatively tested camera lens installing sleeve of graticule cylinder (2-3) (2-2) adjust handwheel (2-4) and be fixedly installed in respectively backlight (2-5), homogenize plate (2-6) and the graticule (2-7) 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 be centered close on same optical axis and each parts are arranged in order along optical axis bearing of trend; On described graticule (2-7), be distributed with the multiple tracks parallel lines of uniformly-spaced arranging successively.
2. multifunctional optical lens parameters detecting instrument according to claim 1, it is characterized in that: described tested lens assembly also comprises the straight-line displacement measurement label (2-8) being fixedly arranged on graticule cylinder (2-3) outer tube wall, camera lens (2-9) is measured in the straight-line displacement of detection of straight lines displacement measurement label (2-8) of being used for that is positioned at graticule cylinder (2-3) side, be located at straight-line displacement and measure straight-line displacement survey sensor and the processing module (2-10) thereof on straight-line displacement measurement label (2-8) imaging plane of camera lens (2-9), 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.
3. multifunctional optical lens parameters detecting instrument according to claim 1 and 2, it is characterized in that: described bearing comprises base (1-1), erect and be placed in the lifting guide pole (1-2) on base (1-1), being positioned at base (1-1) top and movable sleeve is placed in the movable bearing support (1-3) on lifting guide pole (1-2) and is used for adjusting movable bearing support (1-3) the lift adjustment knob (1-4) of lifting guide pole (1-2) height and position relatively, described tested lens assembly is installed on base (1-1), described standard lens assembly is installed on movable bearing support (1-3),
On described bearing, be also provided with display screen (4-2), described intelligent image treating apparatus (4-1) is connected output information with display screen (4-2).
4. with optical lens parameter detection instrument claimed in claim 1, detect a method for optical lens focal length, it is characterized in that: described method comprises the following steps:
1) rotate the focusing ring of Digital Video (3-1) to the position of infinite distance sign, tested camera lens (2-1) is positioned over to 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 to 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) by graticule cylinder, adjust handwheel (2-4) and drive graticule cylinder (2-3) relatively tested camera lens installing sleeve (2-2) to move axially, thereby adjust the position of the relatively tested camera lens of graticule (2-7) (2-1) in graticule cylinder (2-3); By the sharpness of intelligent image treating apparatus (4-1) judgement graticule image, find out graticule image the most clearly simultaneously, and according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly;
3) according to following formula, calculate the focal distance f 2:f2=f1*d2/d1 of tested camera lens (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).
5. with optical lens parameter detection instrument claimed in claim 1, detect the infrared out of focus value of optical lens and a method for infrared sharpness drop-out value, it is characterized in that: described method comprises the following steps:
1) rotate the focusing ring of Digital Video (3-1) to the position of infinite distance sign, tested camera lens (2-1) is positioned over to 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 to graticule (2-7), make the pattern of graticule (2-7) form graticule image, and be transferred to intelligent image treating apparatus (4-1) by tested camera lens (2-1), Digital Video (3-1);
2) straight-line displacement is set on graticule cylinder (2-3) outer tube wall and measures label (2-8), on the bearing of graticule cylinder (2-3) side, arrange and be used for the straight-line displacement of detection of straight lines displacement measurement label (2-8) and measure camera lens (2-9) and be located at straight-line displacement and measure straight-line displacement survey sensor and the processing module (2-10) thereof on camera lens (2-9) focal plane;
3) by graticule cylinder, adjust handwheel (2-4) and drive graticule cylinder (2-3) relatively tested camera lens installing sleeve (2-2) to move axially, thereby adjust the position of the relatively tested camera lens of graticule (2-7) (2-1) in graticule cylinder (2-3); Simultaneously by the sharpness of intelligent image treating apparatus (4-1) judgement graticule image, find out graticule image the most clearly, record definition values K1 now, and by straight-line displacement, measure camera lens (2-9) and straight-line displacement survey sensor and processing module (2-10) thereof and detect straight-line displacement measurement label (2-8) position P1 now;
4) control backlight (2-5) and send infrared light, by intelligent image treating apparatus (4-1) record definition values K2 now; Finely tune afterwards graticule cylinder and adjust handwheel (2-4), until intelligent image treating apparatus (4-1) is found out graticule image the most clearly, by straight-line displacement, measure camera lens (2-9) and straight-line displacement survey sensor and processing module (2-10) thereof and detect straight-line displacement measurement label (2-8) position P2 now;
5) by following formula, calculate infrared out of focus value and the infrared sharpness drop-out value of tested camera lens (2-1):
Infrared out of focus value=P2-P1;
Infrared sharpness drop-out value=K1-K2.
6. with optical lens parameter detection instrument claimed in claim 1, detect a method for the throughput of optical lens, it is characterized in that: described method comprises the following steps:
1) set the fixedly time shutter of Digital Video (3-1), rotate the focusing ring of Digital Video (3-1) to the position of infinite distance sign;
2) when not yet tested camera lens (2-1) being positioned over to tested camera lens installing sleeve (2-2), control backlight (2-5) luminous, by intelligent image treating apparatus (4-1), calculate the maximum brightness value B1 of Digital Video (3-1) output signal;
3) first tested camera lens (2-1) is positioned over to the detection position of tested camera lens installing sleeve (2-2), make backlight (2-5) keep luminous, make light by homogenize plate (2-6) uniform irradiation to 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 by graticule cylinder, adjust handwheel (2-4) and drive graticule cylinder (2-3) relatively tested camera lens installing sleeve (2-2) to move axially, thereby adjust the position of the relatively tested camera lens of graticule (2-7) (2-1) in graticule cylinder (2-3); By the sharpness of intelligent image treating apparatus (4-1) judgement graticule image, find out graticule image the most clearly, according to this spacing d1 of adjacent two lines on graticule image calculation graticule image the most clearly simultaneously;
According to following formula, calculate afterwards the focal distance f 2:f2=f1*d2/d1 of tested camera lens (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 the adjustment process of step 3), the imaging in Digital Video (3-1), when graticule image the most clearly, is calculated the now maximum brightness value B2 of Digital Video (3-1) output signal by intelligent image treating apparatus (4-1);
5) according to following formula, calculate the logical backscatter extinction logarithmic ratio T:T=(B2/B1 of tested camera lens (2-1)) * (N/f2)
2, the long measure of N for setting;
6) according to logical their throughput of backscatter extinction logarithmic ratio judgement of a plurality of tested camera lenses (2-1), logical backscatter extinction logarithmic ratio T is larger, and the throughput of corresponding tested camera lens (2-1) is higher.
7. a method that detects the equivalent effective aperture of optical lens with optical lens parameter detection instrument claimed in claim 1, it is characterized in that: described Digital Video (3-1) is arranged on and is erected on the lifting guide pole (1-2) that is placed in base (1-1) top by a movable bearing support (1-3), between movable bearing support (1-3) and lifting guide pole (1-2), be provided with for adjusting movable bearing support (1-3) the lift adjustment knob (1-4) of lifting guide pole (1-2) height and position relatively; Described intelligent image treating apparatus (4-1) is connected with display screen (4-2);
Described method comprises the following steps:
1) rotate the focusing ring of Digital Video (3-1) to the position of most proximal end sign;
2) tested camera lens (2-1) is positioned over to the detection position of tested camera lens installing sleeve (2-2), controls backlight (2-5) luminous;
3) by lift adjustment knob (1-4), adjust the relative position of Digital Video (3-1) and tested camera lens (2-1), make tested camera lens (2-1) entrance pupil image that display screen (4-2) shows from fuzzy to clear again to fuzzy, in above-mentioned adjustment process, by intelligent image treating apparatus (4-1), judge the definition values of tested camera lens (2-1) entrance pupil image, 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 calculation pixel quantity, draw the image pixel point quantitative value N1 of entrance pupil;
4) according to following formula, calculate the equivalent effective aperture D1 of 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).
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| CN105241636A (en) | 2016-01-13 |
| CN105136433A (en) | 2015-12-09 |
| CN105241636B (en) | 2017-10-24 |
| CN103728121B (en) | 2015-12-02 |
| CN105136433B (en) | 2017-07-04 |
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