CN105091798B - The inclined measurement apparatus of new transmission-type center of lens and measuring method - Google Patents
The inclined measurement apparatus of new transmission-type center of lens and measuring method Download PDFInfo
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Abstract
The invention belongs to field of optical measuring technologies, and in particular to a kind of inclined measurement apparatus of new transmission-type center of lens and measuring method.Device includes interior focusing variable focus package, eyeglass to be measured and high precisive angle gauge successively, wherein：The interior focusing variable focus package includes the light source 10 that order is axially disposed successively, target 20, parallel light tube collimating mirror 30, collimating mirror 40, fixed lens 50；The high precisive angle gauge includes the LCD90 that collimating mirror 70, CCD80 and the having electronic that order is axially disposed successively carve chi.The present invention is inclined using angular instrument measurement center of lens, device high resolution and resolution ratio immobilizes；Using interior focusing zoom technology, the measurement range of device is wide, has taken into account focal length, the middle burnt, measurement of short focus eyeglass；It is using electronic division quarter chi, device no parallax and insensitive to detection ambient brightness using OSD technologies.
Description
Technical field
The invention belongs to field of optical measuring technologies, and in particular to a kind of inclined measurement apparatus of new transmission-type center of lens and
Measuring method.
Background technology
In optics cold machining process, center of lens is an important indicator partially, and the center of eyeglass directly influences light partially
The image quality of system, therefore, it is necessary to strictly control the center in optical system per a piece of eyeglass inclined, that is to say, that detection mirror
Piece center is that must examine process together in optics cold machining process partially.
Due to the inclined measurement apparatus of transmission-type center of lens than the inclined measurement apparatus of reflective center of lens have it is easy to use,
The advantages of efficiency high；Therefore, optics production unit is largely seldom used using the inclined measurement apparatus of transmission-type center of lens at present
Reflective align measurement device.
The inclined measurement apparatus of transmission-type center of lens is that eyeglass focal plane to be measured is measured using measuring microscope in the market
As the size jumped, its center drift angle amount is calculated further according to lens optical parameter to be measured, its advantage is that device is simple, clear, shortcoming
It is that detection range is limited by device rail length, it is impossible to focal length eyeglass is detected, in order to detect that the center of focal length eyeglass is inclined,
Often taken during actually detected increases a piece of auxiliary lens behind eyeglass to be measured, makes eyeglass to be measured and auxiliary lens group
Into microscope group focal length in device detection range, due to adding auxiliary lens, system optics parameter changed, it is necessary to
It is strict to calculate, at the same time, it is also necessary to it is accurate to measure auxiliary lens and the optical parametric of the microscope group of lens combination to be measured, operate
Come very complicated, another aspect, the different auxiliary lens of different eyeglasses to be measured needs.
In recent years, there is another inclined measurement apparatus of transmission-type center of lens in the market, and the device is no longer limited to survey
Measure the picture at eyeglass focal plane to be measured and jump size, but gained knowledge according to geometry, measure the bottom of isosceles triangle and high length, then
Its drift angle size is calculated, specially measures the distance between eyeglass to be measured and measuring microscope object lens, then measure the picture of the position
Size is jumped, can thus calculate that center of lens to be measured is bigger than normal small, and the center now detected is angular amount partially.This measurement dress
Put and add detection range, but the resolution ratio of the device is not fixed, on the other hand, by eyeglass to be measured and microscopical Optical Parametric
Several restrictions, still there are some eyeglasses not detect.
The inclined detection means in both the above center uses optical glass graticle, therefore is needed during detection first micro- to measuring
Mirror carries out parallax correction, otherwise influences measurement accuracy；On the other hand, it is typically all dark graduation that chi is carved in these device graduation, if
It is excessively dark to detect environment, is not easy reading, particularly is more difficult to operate in darkroom.
In summary, how to overcome the above-mentioned technological deficiency of transmission-type align measurement device in the prior art is this area
Technical staff's technical problem urgently to be resolved hurrily.
The content of the invention
The invention provides a kind of inclined measurement apparatus of new transmission-type center of lens and measuring method, i.e., high-resolution and point
Resolution is fixed, measurement range is wide, no parallax, the inclined measurement apparatus of center of lens to ambient brightness no requirement (NR).
The invention provides a kind of new inclined measurement apparatus of transmission-type center of lens, as Fig. 2 shows, become successively including interior focusing
Burnt component, eyeglass to be measured and high precisive angle gauge, three's optical axis is coaxial, wherein：
The interior focusing variable focus package includes the light source (10) that order is axially disposed successively, target (20), parallel light tube
Collimating mirror (30), collimating mirror (40), fixed lens (50)；The high precisive angle gauge includes the standard that order is axially disposed successively
Straight mirror (70), CCD (80) and having electronic carve the LCD (90) of chi；
Wherein, the light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), fixed lens
(50), eyeglass (60) to be measured, collimating mirror (70) and CCD (80) order are in axial direction upper is set.
It should be noted that the LCD (90) that having electronic carves chi is actually the display screen structure being arranged on CCD (80)；
As shown in Fig. 2 having electronic carve chi LCD (90) its electrically connected with CCD (80), it is also built-in the structure inside light path system
Construction, its other device for being actually also light path system is coaxial.
Preferably, as one kind can embodiment, the light source (10), the target (20), the parallel light tube collimation
Mirror (30), the collimating mirror (40) and the fixed lens (50) form an interior focusing zoom system, pancreatic system；
The light source (10) illuminates the target (20), and target (20) is in parallel light tube collimating mirror (30) focal plane；
The collimating mirror (40) is used to be axially moveable；The fixed lens (50) are fixed；The eyeglass to be measured (60) is used to put
In light path, the collimating mirror (40) is moved axially until the having electronic, which is carved on the LCD (90) of chi, target (20) clearly occurs
Picture untill；The eyeglass to be measured (60) is used to rotate a circle, and the picture that target (20) is read on the LCD (90) of chi is carved from having electronic
The radius size of the track skipped over is that the center of eyeglass to be measured is bigger than normal small.
Preferably, as one kind can embodiment, the collimating mirror (40) can move along the axial direction, and other
Optical element is fixed；The target (20) is used for through parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50) light
Part imaging is learned from infinitely far changing as far as limited, so as to produce infinitely as far as the limited target far changed.
The LCD (90) that the collimating mirror (70), CCD (80) and having electronic carve chi forms a high precisive angle gauge and it is differentiated
Rate immobilizes.
Preferably, as one kind can embodiment, the having electronic carves and is provided with right-angled intersection electronics on the LCD (90) of chi
Graduation mark.
Preferably, as one kind can embodiment, the CCD (80) is high-res video capture device.
Preferably, as one kind can embodiment, the eyeglass (60) to be measured is focal length or middle burnt or short focus eyeglass.
Preferably, as one kind can embodiment, the collimating mirror (40) be used for be axially moveable；And the fixed lens
(50) fix in the axial direction.
Preferably, as one kind can embodiment, the eyeglass (60) to be measured be used for along the axial direction rotate.
Correspondingly, present invention also offers a kind of measuring method, dress is measured partially using above-mentioned new transmission-type center of lens
Put implementation, including following operating procedure：
Step 1: the light source (10), the target (20), the parallel light tube collimating mirror (30), the collimating mirror
(40), the fixed lens (50) constitute the interior focusing variable focus package；Eyeglass to be measured (60) is placed in light path, by
The mobile collimating mirror (40) is up to the target (20) blur-free imaging is in the LCD (90) of having electronic graduation on the axial direction
On；
Step 2: the rotation eyeglass (60) to be measured, during eyeglass (60) to be measured is rotated, in having electronic graduation
On LCD (90) it is observed that approximate circle track；
Step 3: the radius for determining the circular trace is the center drift angle angle value of the eyeglass (60) to be measured.
Beneficial effects of the present invention include：
1st, in the new inclined measurement apparatus of transmission-type center of lens provided in an embodiment of the present invention, using angular instrument rather than survey
It is bigger than normal small to measure center of lens to be measured to measure microscope, can be measured with angular instrument with direct measurement center of lens drift angle, without carrying out
Conversion, and angular instrument angle measurement accuracy is high, resolution ratio is fixed；
2nd, target is provided to eyeglass to be measured using interior focusing variable focus package, extends measurement device scope, length can be taken into account
Burnt, middle burnt, short focus eyeglass；
3rd, to detect center of lens using angular instrument and interior focusing variable focus package inclined, simple to operate, it is not necessary to extra increase
Attachment lens；
4th, using electronic division carve chi, electronic division carve chi no parallax, carve chi light in itself, to detection lightness environment without will
Ask；
Brief description of the drawings
Fig. 1 is the measurement partially general light path principle schematic diagram of center of lens；
Fig. 2 is a kind of light path principle schematic diagram of the new inclined measurement apparatus of transmission-type center of lens provided by the invention；
Reference in Fig. 2：
Light source 10；Target 20；Parallel light tube collimating mirror 30；Collimating mirror 40；Fixed lens 50；Eyeglass 60 to be measured；Collimating mirror
70；CCD80；Having electronic carves the LCD90 of chi；
Fig. 3 is LCD90 electronic division groove schematic diagrames in the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in Fig. 2 in the concrete structure of the above-mentioned new inclined measurement apparatus of transmission-type center of lens, device includes successively
Interior focusing variable focus package, eyeglass to be measured and high precisive angle gauge, three's optical axis are coaxial.
Wherein, the light source 10, target 20, parallel light tube collimating mirror 30, collimating mirror 40, fixed lens 50, eyeglass to be measured
60th, collimating mirror 70 and the in axial direction upper setting of CCD80 orders；
Wherein, the light source (10), the target (20), the parallel light tube collimating mirror (30), the collimating mirror (40)
Formed with the fixed lens (50) into an interior focusing zoom system, pancreatic system；
Wherein, the collimating mirror 70, CCD80 and having electronic carve LCD90 one high precisive angle gauges of composition of chi；
The structural principle inclined to above-mentioned new transmission-type center of lens and R＆D process are done and illustrated below：
It is well known that center of lens is partially a kind of more intuitively to understand the size for being exactly lens light axis and reference axis deviation,
See Fig. 1.
The new equipment that either the inclined detection means of conventional center still occurs in recent years, all it is light as shown in Figure 1 during detection
Road frontlighting road is detected, and is learnt by being analyzed in background technology, and the method for this frontlighting road detection has some critical defects, no
Present situation plant produced demand can be met, in consideration of it, the present invention have adjusted mentality of designing.
There are an important principle, i.e. light path principle in geometric optical theory, according to this principle, if by Fig. 1
Light path inversely from the point of view of, eyeglass focal plane to be measured place a target, directional light will be emitted in eyeglass opposite side, if eyeglass to be measured is deposited
It is inclined at center, angular instrument can be utilized to can detect its deviation angle size when rotating eyeglass to be measured.
In fact, center of lens to be measured partially, the deviation angle and focal length have following relation (center inclination angle be general all smaller, can
With approximate processing)：
This formula also demonstrates the correctness of the thinking.
Measured during due to detection using angular instrument, it is clear that resolution ratio of the present invention is fixed, and can be selected as needed
Suitable resolution ratio is selected, so solves the unfixed problem of conventional apparatus resolution ratio.
By being analyzed in background technology, the inclined measurement apparatus limitation of conventional center mainly has two, first, device resolution ratio is not solid
Fixed, another is exactly that measurement range is small.
By above-mentioned analysis, fixation problem has not solved device resolution ratio, below groundwork be solve measurement range it is small
Problem.
Core concept of the present invention is to place a target in eyeglass focal plane to be measured, and directional light is projected from eyeglass opposite side to be measured,
It is bigger than normal small come inspection center with angular instrument again.
Because eyeglass species to be measured is various, specifically, there are focal length, middle burnt, short focus, this requires to design in apparatus body
Under product limited circumstances, using the teaching of the invention it is possible to provide the target of various distances, therefore, the present invention makes full use of geometric optical theory, devise one
Interior focusing variable focus package is covered, can be produced in minimum adjustable range by infinitely as far as the limited target far changed.
In view of existing apparatus reading difficult problem (mainly in cemented doublet) in darkroom, the present invention has abandoned existing
Optics graticle, with OSD technologies, employ advanced electronic division, because electronic division lights in itself, so the present invention exist
Ambient brightness is not almost required in operation, certainly, another advantage of electronic division is no parallax.
Finally, the index path in Fig. 2 is devised present invention incorporates the studies above thinking, as Fig. 2 shows, light source 10, target
20th, parallel light tube collimating mirror 30, collimating mirror 40, fixed lens 50 form an interior focusing variable focus package, are collimated by moving axially
Mirror 40 is imaged on the object space focal plane of eyeglass 60 to be measured up to target 20, by geometric optical theory, is now gone out from eyeglass 60 to be measured
What is penetrated is directional light, and collimating mirror 70, CCD80, the LCD90 of having electronic groove form an angular instrument, rotate eyeglass 60 to be measured, if
Eyeglass 60 to be measured has that center is inclined, then can be observed on the LCD90 of having electronic groove during eyeglass 60 to be measured is rotated
One approximate circle track, the radius of the circular trace are that the center of eyeglass 60 to be measured is inclined.
(the light source 10 in structure illustrated in Figure 2；Target 20；Parallel light tube collimating mirror 30；Collimating mirror 40；Fixed lens
50；Eyeglass 60 to be measured；Collimating mirror 70；CCD80；Having electronic carves the LCD90 of chi).
Accordingly, the present invention is when the specifically used new inclined measurement apparatus of transmission-type center of lens implements measurement, Ke Yican
Examine following method and step operation：
Step 1: the light source 10, the target 20, the parallel light tube collimating mirror 30, the collimating mirror 40, described solid
Horizontal glass first 50 constitutes the interior focusing variable focus package；Eyeglass 60 to be measured is placed in light path, by the axial direction
The mobile collimating mirror 40 is up to the blur-free imaging of target 20 is on the LCD90 of having electronic graduation；
Step 2: the rotation eyeglass 60 to be measured, during eyeglass 60 to be measured is rotated, in the LCD90 of having electronic graduation
It is upper to be observed that an approximate circle track；
Step 3: the radius for determining the circular trace is the center drift angle angle value of the eyeglass 60 to be measured.
In summary, the present invention is with the obvious advantage than the inclined measurement apparatus of conventional center, resolution ratio fix (10 seconds, city at present
Resolution ratio highest on field)；Measurement range is wide, can take into account focal length, middle burnt, short focus eyeglass；To detection ambient light brightness without will
Ask；No parallax, it is not necessary to chi focusing is carved to graduation；It is easy to operate.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of new inclined measurement apparatus of transmission-type center of lens, it is characterised in that successively including interior focusing variable focus package, to be measured
Eyeglass and high precisive angle gauge, three's optical axis is coaxial, wherein：
The interior focusing variable focus package includes the light source (10) that order is axially disposed successively, target (20), parallel light tube collimation
Mirror (30), collimating mirror (40), fixed lens (50)；
The high precisive angle gauge includes collimating mirror (70), CCD (80) and the having electronic that order is axially disposed successively and carves chi
LCD(90)；
Wherein, the light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50), treat
Survey the in axial direction upper setting of eyeglass (60), collimating mirror (70) and CCD (80) order.
2. the new inclined measurement apparatus of transmission-type center of lens according to claim 1, it is characterised in that：
The light source (10), the target (20), the parallel light tube collimating mirror (30), the collimating mirror (40) and the fixation
Camera lens (50) forms an interior focusing zoom system, pancreatic system；
The light source (10) illuminates the target (20), and target (20) is in parallel light tube collimating mirror (30) focal plane；It is described
Collimating mirror (40) is used to be axially moveable；The fixed lens (50) are fixed；The eyeglass to be measured (60) is used to be placed in light
Lu Zhong, the collimating mirror (40) is moved axially until the having electronic, which is carved on the LCD (90) of chi, the picture of target (20) clearly occurs
Untill；The eyeglass to be measured (60) is used to rotate a circle, and the picture that reading target (20) on the LCD (90) of chi is carved from having electronic omits
The radius size for the track crossed is that the center of eyeglass to be measured is bigger than normal small.
3. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that：
The collimating mirror (40) is used to move along the axial direction, and other optical elements are fixed；The target (20)
For through parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50) optical element imaging from infinitely as far as limited
Remote change, so as to produce infinitely as far as the limited target far changed.
4. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The LCD (90) that the collimating mirror (70), CCD (80) and having electronic carve chi forms a high precisive angle gauge and its resolution ratio is consolidated
It is fixed constant.
5. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The having electronic is carved and is provided with right-angled intersection electronics graduation mark on the LCD (90) of chi.
6. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The CCD (80) is high-res video capture device.
7. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The eyeglass to be measured (60) is focal length or middle burnt or short focus eyeglass.
8. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The collimating mirror (40) is used to be axially moveable；And the fixed lens (50) are fixed in the axial direction.
9. the new inclined measurement apparatus of transmission-type center of lens according to claim 2, it is characterised in that
The eyeglass to be measured (60) is used to rotate along the axial direction.
10. a kind of measuring method, it is characterised in that inclined using any one of the claim 1-9 new transmission-type center of lens
Measurement apparatus is implemented, including following operating procedure：
Step 1: the light source (10), the target (20), the parallel light tube collimating mirror (30), the collimating mirror (40), institute
State fixed lens (50) and constitute the interior focusing variable focus package；Eyeglass to be measured (60) is placed in light path, by the axle
The collimating mirror (40) is moved up to side until the target (20) blur-free imaging is on the LCD (90) of having electronic graduation；
Step 2: the rotation eyeglass (60) to be measured, during eyeglass (60) to be measured is rotated, in the LCD of having electronic graduation
(90) on an it is observed that approximate circle track；
Step 3: the radius for determining the circular trace is the center drift angle angle value of the eyeglass (60) to be measured.
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| CN108801178B (en) * | 2017-05-04 | 2020-07-10 | 北京理工大学 | Differential confocal auto-collimation center deviation and curvature radius measuring method and device |
| CN109425312B (en) * | 2017-09-01 | 2021-12-03 | 宁波舜宇车载光学技术有限公司 | Eccentricity testing device and method |
| CN108663197A (en) * | 2018-07-02 | 2018-10-16 | 北京全欧光学检测仪器有限公司 | A kind of small-sized lens detecting device and its detection method |
| CN110926380B (en) * | 2019-12-30 | 2021-07-09 | 苏州迅镭激光科技有限公司 | Method for measuring coaxiality of optical element of laser cutting head |
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