CN110455502A - The method of lens and lens group focus and image point position is judged based on image parallax - Google Patents
The method of lens and lens group focus and image point position is judged based on image parallax Download PDFInfo
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- CN110455502A CN110455502A CN201910751773.6A CN201910751773A CN110455502A CN 110455502 A CN110455502 A CN 110455502A CN 201910751773 A CN201910751773 A CN 201910751773A CN 110455502 A CN110455502 A CN 110455502A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0221—Testing optical properties by determining the optical axis or position of lenses
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Abstract
The present invention discloses the method that lens and lens group focus and image point position are judged based on image parallax, comprising the following steps: preparation tool, second of visual observation, third time visual observation, compares parallax and show that focus and parallax relatively obtain picture point first time visual observation；The present invention is in the way of directly observation image parallax, special light source is not needed, eyepiece system is not needed, using eyes as eyepiece, observation self-control aciculiform object AB and its formed real image A'B' is mobile, and whether without difference, you can get it that focal length then obtains focus, observation self-control aciculiform object AB with make whether aciculiform object CD imaging C'D' keeps synchronous you can get it picture point in visual field by oneself, not only instrument is reduced whole process, and accuracy is high, operation is also simpler, is suitble to the requirement of Experiment of College Physics.
Description
Technical field
The present invention relates to measuring method fields, more particularly to based on image parallax judge lens and lens group focus with
The method of image point position.
Background technique
Position judgement for lens focus, picture point, under normal circumstances, we are determined using object screen image screen method,
It is to need to judge the clarity of imaging, and clearly standard is different for everyone judgement with the shortcomings that object screen image screen method
, focus, the position difference of picture point of different people's measurements are very big, and rely on the readability of picture, and the result of measurement is not smart enough
Standard, therefore, the present invention propose to judge that the method for lens and lens group focus and image point position is existing to solve based on image parallax
The problem of technology.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes the side for judging lens and lens group focus and image point position based on image parallax
Method should judge that the method for lens and lens group focus and image point position utilized the side for directly observing image parallax based on image parallax
Formula does not need special light source, does not need eyepiece system, using eyes as eyepiece, observation self-control aciculiform object AB and its institute at
Real image A'B' mobile whether without difference, you can get it that focal length then obtains focus, observation self-control aciculiform object AB and self-control aciculiform
Whether object CD imaging C'D' keeps synchronous you can get it picture point in visual field, and not only instrument is reduced whole process, and
And accuracy is high, operation is also simpler, is suitble to the requirement of Experiment of College Physics.
To solve the above-mentioned problems, the present invention proposes to judge lens and lens group focus and image point position based on image parallax
Method, comprising the following steps:
Step 1: preparation tool
Preparation tool: self-control aciculiform object AB, plane mirror M, convex lens or lens group L and optical bench will make aciculiform by oneself
Object AB, plane mirror M, convex lens or lens group L are both placed on optical bench, by plane mirror M be placed on convex lens or
Behind lens group L, then by self-control aciculiform object AB be placed on before convex lens or lens group L, generate self-control aciculiform object AB institute
At real image A'B'；
Step 2: first time visual observation
Drive the distance of self-control aciculiform object AB to convex lens or lens group L descending, then, eyes are perpendicular to paper
Direction on move left and right, observe AB and A'B', when B and B' point moves simultaneously, and movement speed is identical, and B exists always with B' point
When on one vertical line, then AB and A'B' is same position in the axis direction of L；
Step 3: second of visual observation
When eyes move left and right observation AB and A'B', AB is different from the movement speed of A'B', the transverse shifting speed of A'B'
The movement speed for spending the AB that compares is slower, then A'B' is imaged on behind AB, the position of A'B' and AB on central line of lens
It is different；
Step 4: third time visual observation
When moving left and right eyes observation AB and A'B', transverse shifting speed of the transverse shifting speed compared to AB of A'B'
Faster, then A'B' is imaged on before AB, the position of A'B' and AB on central line of lens is different；
Step 5: compare parallax and obtain focus
According to Step 2: Step 3: step 4 progress parallax comparison, judges whether the imaging position of A'B' is one times of coke
Away from, if eyes move left and right, the no difference of the movement of AB and A'B', then convex lens or lens group L and self-control aciculiform object
The distance of AB is focal length, to obtain focus；
Step 6: parallax relatively obtains picture point
Prepare self-control aciculiform object CD, first places self-control aciculiform object AB and convex lens or lens group L on optical bench, set AB
In the range of one times of focal length on the left of L is to two focus length, then CD is put into the right side of L on optical bench, sets the distance of CD to L
Greater than two focus length, C'D' is imaged, and then, eyes move left and right on the direction perpendicular to paper, shape in mobile CD on the left of L
At visual field, when AB keeps synchronous in visual field with C'D', then the position of CD and the position of AB imaging are in same point, as AB
The position of picture point.
Further improvement lies in that: in the step 1, self-control aciculiform object AB is placed between convex lens or lens group L
Distance is greater than the position of one times of focal length.
Further improvement lies in that: in the step 2, when eyes move left and right, the position of same point is will not to change
, obtain self-control aciculiform object AB to the distance between convex lens or lens group L be one times of focal length, AB and A'B' at it is equal greatly, it is mutual
The object and picture of handstand.
Further improvement lies in that: in the step 3, the transverse shifting speed of A'B' compare AB movement speed it is slower,
AB is caused in vision to compare A'B' closer to the edge of vision.
Further improvement lies in that: in the step 4, transverse shifting speed of the transverse shifting speed compared to AB of A'B'
Faster, A'B' is caused in vision to compare AB closer to the edge of vision.
Further improvement lies in that: in the step 5, judge A'B' imaging position whether be one times of focal length foundation be
Whether AB and A'B' are at equal object and picture big, stand upside down mutually, and always on a vertical line whether the two.
Further improvement lies in that: in the step 6, set AB, CD as two be similar to object because setting CD to L away from
From two focus length is greater than, so the tip diameter of setting CD is greater than the tip diameter of AB, so that C'D' is similar to AB size.
The device of lens and lens group focus and image point position, including optical bench, guide rail, camera shooting are judged based on image parallax
Head, needle point AB and lens group, the left side on the optical bench is equipped with guide rail, and camera is movably equipped on guide rail, the camera shooting
It is successively arranged needle point AB and lens group on the optical bench of head right direction, the right side on the optical bench is equipped with plane reflection
One of mirror and needle point CD.
Further improvement lies in that: the long 6cm of guide rail, and it is 3cm, the camera that the camera, which moves left and right distance,
It can be replaced with eyes, mobile phone.
Further improvement lies in that: the needle point AB and needle point CD is one of cone or cylinder, and diameter is
0.05mm-5mm, length 0.5cm-5cm.
The invention has the benefit that the present invention does not need special light source in the way of directly observation image parallax,
Eyepiece system is not needed, using eyes as eyepiece, whether observation self-control aciculiform object AB and its formed real image A'B' movement does not have
There is a difference you can get it that focal length then obtains focus, observation self-control aciculiform object AB is being regarded with aciculiform object CD imaging C'D' is made by oneself
Whether synchronous you can get it picture point is kept in, and not only instrument is reduced whole process, but also accuracy is high, operates also simpler
It is single, it is suitble to the requirement of Experiment of College Physics, and whether the present invention synchronizes to the judgement as readability, becoming mobile to image
Judgement take parallax to draw a conclusion, increase the accuracy of measurement and by multiple visual observation.
Detailed description of the invention
Fig. 1 is step one schematic illustration of the invention；
Fig. 2 is step two vision schematic diagram of the invention；
Fig. 3 is step three vision schematic diagram of the invention；
Fig. 4 is step four vision schematic diagram of the invention；
Fig. 5 is step six schematic illustration of the invention.
Fig. 6 is the device of the invention schematic diagram；
Fig. 7 is the device of the invention schematic diagram.
Specific embodiment
In order to realize invention technological means, reach purpose and effect is easy to understand, below with reference to specific implementation
Mode, the present invention is further explained.
According to Fig. 1,2,3,4,5, present embodiments provide based on image parallax judge lens and lens group focus and
The method of image point position, the specific steps are as follows:
Step 1: preparation tool
Preparation tool: self-control aciculiform object AB, plane mirror M, convex lens or lens group L and optical bench will make aciculiform by oneself
Object AB, plane mirror M, convex lens or lens group L are both placed on optical bench, by plane mirror M be placed on convex lens or
Behind lens group L, then by self-control aciculiform object AB be placed on before convex lens or lens group L, will self-control aciculiform object AB place
Distance is greater than the position of one times of focal length between convex lens or lens group L, generates real image A'B' formed by self-control aciculiform object AB,
Such as Fig. 1；
Step 2: first time visual observation
Drive the distance of self-control aciculiform object AB to convex lens or lens group L descending, then, eyes are perpendicular to paper
Direction on move left and right, observe AB and A'B', when B and B' point moves simultaneously, and movement speed is identical, and B exists always with B' point
When on one vertical line, then axis direction of the AB and A'B' in L is same position, and when eyes move left and right, same point
Position is will not be changed, obtain self-control aciculiform object AB to the distance between convex lens or lens group L be one times of focal length, AB
With A'B' at equal object and picture big, stand upside down mutually, such as Fig. 2, wherein a is eyes in intermediate view；B is the view after eyes move to left
Figure；C is the view after eyes move to right；D is for object AB on L axis direction and as the imaging position A'B'；
Step 3: second of visual observation
When eyes move left and right observation AB and A'B', AB is different from the movement speed of A'B', the transverse shifting speed of A'B'
The movement speed for spending the AB that compares is slower, and AB in vision is caused to compare A'B' closer to the edge of vision, then A'B' is imaged
Behind AB, the position of A'B' and AB on central line of lens is different, and such as Fig. 3, wherein a is eyes in intermediate view；b
View after being moved to left for eyes；C is the view after eyes move to right；D is for object AB on L axis direction and as the imaging position A'B'；
Step 4: third time visual observation
When moving left and right eyes observation AB and A'B', transverse shifting speed of the transverse shifting speed compared to AB of A'B'
Faster, A'B' in vision is caused to compare AB closer to the edge of vision, then A'B' is imaged on before AB, A'B' and AB exist
Position on central line of lens is different, and such as Fig. 4, wherein a is eyes in intermediate view；B is the view after eyes move to left；c
View after being moved to right for eyes；D is for object AB on L axis direction and as the imaging position A'B'；
Step 5: compare parallax and obtain focus
According to Step 2: Step 3: step 4 progress parallax comparison, judges whether the imaging position of A'B' is one times of coke
Away from whether according to being AB and A'B' at equal object and picture big, stand upside down mutually, and always on a vertical line whether the two, such as
When fruit eyes move left and right, the no difference of the movement of AB and A'B', then convex lens or lens group L and self-control aciculiform object AB away from
From as focal length, to obtain focus；
Step 6: parallax relatively obtains picture point
Such as Fig. 5, prepare self-control aciculiform object CD, set the object that AB, CD are two likeness in form, first placement make by oneself aciculiform object AB with it is convex
Lens or lens group L are on optical bench, in the range of setting one times focal length of the AB on the left of L to two focus length, then CD are put into
The right side of L on optical bench, the distance of setting CD to L are greater than two focus length, and C'D' is imaged on the left of L, sets the needle of CD by mobile CD
Sharp diameter is greater than the tip diameter of AB, so that C'D' is similar to AB size, then, eyes are on the direction perpendicular to paper
It moves left and right, visual field is formed, when AB keeps synchronous in visual field with C'D', then the position that the position of CD is imaged with AB is same
A bit, the as position of AB picture point.
According to Fig. 6,7, present embodiments provides and lens and lens group focus and picture point position are judged based on image parallax
The device set, including optical bench 1, guide rail 2, camera 3, needle point AB4 and lens group 5, the left side on the optical bench 1, which is equipped with, leads
Rail 2, and camera 3 is movably equipped on guide rail 2, needle point is successively arranged on the optical bench 1 of 3 right direction of camera
AB4 and lens group 5, the right side on the optical bench 1 are equipped with one of plane mirror 6 or needle point CD7.
The guide rail 2 is 6cm long, and the camera 3 move left and right distance be 3cm, the camera 3 can with eyes,
Mobile phone replaces.
The needle point AB4 and needle point CD7 is one of cone or cylinder, and diameter is 0.05mm-5mm, length
For 0.5cm-5cm.
The present invention does not need special light source, does not need eyepiece system, utilize in the way of directly observation image parallax
Eyes as eyepiece, observation self-control aciculiform object AB and its formed real image A'B' it is mobile whether without difference you can get it focal length after
And obtain focus, whether observation self-control aciculiform object AB keeps synchronous with self-control aciculiform object CD imaging C'D' in visual field
Obtain picture point, not only instrument is reduced whole process, but also accuracy is high, and operation is also simpler, is suitble to Experiment of College Physics
Requirement, and the present invention is to the judgement as readability, becoming the judgement whether synchronized mobile to image, and by repeatedly regarding
Feel observation, takes parallax to draw a conclusion, increase the accuracy of measurement.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. judging the method for lens and lens group focus and image point position based on image parallax, it is characterised in that: including following step
It is rapid:
Step 1: preparation tool
Preparation tool: self-control aciculiform object AB, plane mirror M, convex lens or lens group L and optical bench, will self-control aciculiform object AB,
Plane mirror M, convex lens or lens group L are both placed on optical bench, and plane mirror M is placed on convex lens or lens group
Behind L, then self-control aciculiform object AB is placed on before convex lens or lens group L, generated real formed by self-control aciculiform object AB
As A'B'；
Step 2: first time visual observation
Drive the distance of self-control aciculiform object AB to convex lens or lens group L descending, then, eyes are in the side perpendicular to paper
It moves left and right upwards, observes AB and A'B', when B and B' point moves simultaneously, and movement speed is identical, and B is with B' point always at one
When on vertical line, then AB and A'B' is same position in the axis direction of L；
Step 3: second of visual observation
When eyes move left and right observation AB and A'B', AB is different from the movement speed of A'B', the transverse shifting speed phase of A'B'
The movement speed for comparing AB is slower, then A'B' is imaged on behind AB, the position of A'B' and AB on central line of lens is different
Sample；
Step 4: third time visual observation
When moving left and right eyes observation AB and A'B', transverse shifting speed of the transverse shifting speed compared to AB of A'B' is more
Fastly, then A'B' is imaged on before AB, the position of A'B' and AB on central line of lens is different；
Step 5: compare parallax and obtain focus
According to Step 2: Step 3: step 4 progress parallax comparison, judges whether the imaging position of A'B' is one times of focal length, such as
When fruit eyes move left and right, the no difference of the movement of AB and A'B', then convex lens or lens group L and self-control aciculiform object AB away from
From as focal length, to obtain focus；
Step 6: parallax relatively obtains picture point
Prepare self-control aciculiform object CD, first place self-control aciculiform object AB and convex lens or lens group L on optical bench, sets AB in L
In the range of one times of focal length to two focus length in left side, then CD is put into the right side of L on optical bench, the distance for setting CD to L is big
In two focus length, C'D' is imaged in mobile CD on the left of L, and then, eyes move left and right on the direction perpendicular to paper, are formed
Visual field, when AB keeps synchronous in visual field with C'D', then the position of CD and the position of AB imaging are in same point, as AB picture
The position of point.
2. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
It is characterized in that: in the step 1, self-control aciculiform object AB being placed on the distance between convex lens or lens group L and is greater than one times of coke
Away from position.
3. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
Be characterized in that: in the step 2, when eyes move left and right, the position of same point is will not be changed, obtains self-control needle
Shape object AB to the distance between convex lens or lens group L be one times of focal length, AB and A'B' into equal object and picture to stand upside down greatly, mutually.
4. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
Be characterized in that: in the step 3, the transverse shifting speed of A'B' compare AB movement speed it is slower, cause AB phase in vision
Compare A'B' closer to the edge of vision.
5. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
Be characterized in that: in the step 4, transverse shifting speed of the transverse shifting speed compared to AB of A'B' faster, is caused in vision
A'B' compares AB closer to the edge of vision.
6. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
Be characterized in that: in the step 5, judge A'B' imaging position whether be one times of focal length foundation be AB and A'B' whether at
Deng object and picture big, stand upside down mutually, and always on a vertical line whether the two.
7. the method according to claim 1 that lens and lens group focus and image point position are judged based on image parallax,
It is characterized in that: in the step 6, setting the object that AB, CD are similar to as two, because the distance of setting CD to L is greater than twice of coke
Away from so the tip diameter of setting CD is greater than the tip diameter of AB, so that C'D' is similar to AB size.
8. judging the device of lens and lens group focus and image point position based on image parallax, it is characterised in that: including optical bench
(1), guide rail (2), camera (3), needle point AB (4) and lens group (5), the left side on the optical bench (1) are equipped with guide rail (2),
And camera (3) are movably equipped on guide rail (2), needle is successively arranged on the optical bench (1) of camera (3) right direction
Sharp AB (4) and lens group (5), the right side on the optical bench (1) are equipped with one of plane mirror (6) or needle point CD (7).
9. the device according to claim 8 that lens and lens group focus and image point position are judged based on image parallax,
It is characterized in that: the long 6cm of the guide rail (2), and it is 3cm that the camera (3), which moves left and right distance, the camera (3) can be with
It is replaced with eyes, mobile phone.
10. the device according to claim 8 that lens and lens group focus and image point position are judged based on image parallax,
Be characterized in that: the needle point AB (4) and needle point CD (7) are one of cone or cylinder, and diameter be 0.05mm-5mm,
Length is 0.5cm-5cm.
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