CN105091798A - Novel transmission type eyeglass center-deflection measurement device and measurement method - Google Patents
Novel transmission type eyeglass center-deflection measurement device and measurement method Download PDFInfo
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Abstract
The invention belongs to the optical measurement technology field and particularly relates to a novel transmission type eyeglass center-deflection measurement device and a measurement method. The device sequentially comprises an internal focusing zooming assembly, a to-be-measured eyeglass and a high-precision goniometer, wherein the inner focusing zooming assembly comprises a light source 10, a target 20, a parallel light pipe collimating mirror 30, a collimating mirror 40 and a fixed lens 50 which are sequentially and axially arranged, and the high-precision goniometer comprises a collimating mirror 70, a CCD 80 and an LCD 90 with an electronic length scale which are sequentially and axially arranged. According to the device, the high-precision goniometer is utilized to carry out eyeglass center-deflection measurement, the device has high resolution and invariant resolution; the internal focusing zooming technology is utilized, the measurement scope of the device is wide, long focal length, middle focal length and short focal length eyeglass measurement can be all realized; the OSD technology is utilized, the electronic length scale is utilized, the device can realize no parallax and is not sensitive to ambient detection brightness.
Description
Technical field
The invention belongs to field of optical measuring technologies, be specifically related to the inclined measurement mechanism of a kind of novel transmission-type center of lens and measuring method.
Background technology
In optics cold machining process, center of lens is an important indicator partially, the center deviation of eyeglass directly has influence on the image quality of optical system, therefore, must the center deviation of every a slice eyeglass in strict control both optical system, that is detecting center of lens is must examine operation together in optics cold machining process partially.
Because the inclined measurement mechanism of transmission-type center of lens has easy to use, that efficiency is high advantage than the inclined measurement mechanism of reflective center of lens; Therefore, current optics production unit adopts the inclined measurement mechanism of transmission-type center of lens in a large number and seldom adopts reflective align measurement device.
The inclined measurement mechanism of transmission-type center of lens is the size utilizing measuring microscope to jump to measure eyeglass focal image to be measured in the market, its drift angle, center amount is calculated again according to lens optical parameter to be measured, its advantage is that device is simple, understand, shortcoming is that sensing range limits by device rail length, focal length eyeglass can not be detected, in order to the center deviation of focal length eyeglass can be detected, often take to increase a slice auxiliary lens in actual testing process after eyeglass to be measured, the focal length of the mirror group that eyeglass to be measured and auxiliary lens are formed is in device sensing range, owing to adding auxiliary lens, system optics parameter there occurs change, need strict calculating, meanwhile, also need the optical parametric of the mirror group accurately measuring auxiliary lens and lens combination to be measured, operate very complicated, on the other hand, different eyeglasses to be measured needs different auxiliary lens.
In recent years, market there is the inclined measurement mechanism of another kind of transmission-type center of lens, size jumped by the picture that this device is no longer confined to measure eyeglass focal plane place to be measured, but according to geometry knowledge, measure the end of isosceles triangle and high length, then calculate its drift angle size, be specially the distance measured between eyeglass to be measured and measuring microscope object lens, size jumped by the picture measuring this position again, and so just can calculate center of lens to be measured bigger than normal little, the center deviation now detected is angular amount.This measurement mechanism adds sensing range, but the resolution of this device is not fixed, and on the other hand, by the restriction of eyeglass to be measured and microscopical optical parametric, still has some eyeglasses to detect.
Above two kinds of center deviation pick-up units all adopt optical glass graticule, need first to carry out parallax correction to measuring microscope, otherwise affect measuring accuracy when therefore detecting; On the other hand, these devices point scribing chi is generally all dark graduation, if testing environment is excessively dark, and not easily reading, particularly more difficult operation in darkroom.
In sum, the above-mentioned technological deficiency how overcoming transmission-type align measurement device in prior art is those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
The invention provides the inclined measurement mechanism of a kind of novel transmission-type center of lens and measuring method, namely high resolving power and resolution is fixed, measurement range is wide, no parallax, to the inclined measurement mechanism of the center of lens of ambient brightness no requirement (NR).
The invention provides the inclined measurement mechanism of a kind of novel transmission-type center of lens, as Fig. 2 shows, comprise interior focusing variable focus package, eyeglass to be measured and high precisive angle gauge successively, three's optical axis is coaxial, wherein:
Described interior focusing variable focus package comprises light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), the fixed lens (50) that order is successively arranged vertically; Described high precisive angle gauge comprises the LCD (90) of collimating mirror (70), CCD (80) and the having electronic chi at quarter that order is successively arranged vertically;
Wherein, described light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50), eyeglass to be measured (60), collimating mirror (70) and CCD (80) all order in axial direction upper settings.
It should be noted that, the LCD (90) that having electronic carves chi is actually the display screen structure be arranged on CCD (80); As shown in Figure 2, the LCD (90) of having electronic chi at quarter is electrically connected it with CCD (80), and it is also the structure structure being embedded in light path system inside, and it is in fact also other devices of light path system is coaxial.
Preferably, can embodiment as one, described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40) and described fixed lens (50) form an interior focusing zoom system, pancreatic system;
Described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40) and described fixed lens (50) form an interior focusing zoom system, pancreatic system;
Described light source (10) illuminates described target (20), and target (20) is in described parallel light tube collimating mirror (30) focal plane; Described collimating mirror (40) is for moving vertically; Described fixed lens (50) maintains static; Described eyeglass to be measured (60) for being placed in light path, move axially described collimating mirror (40) until described having electronic carve the LCD (90) of chi upper clear there is the picture of target (20) till; Described eyeglass to be measured (60) is for rotating a circle, and the radius size of carving the track that picture that the LCD (90) of chi reads target (20) skips over from having electronic is the center deviation size of eyeglass to be measured.
Preferably, can embodiment as one, described collimating mirror (40) can move along on described axial direction, and other optical elements maintain static; Described target (20) for through parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50) optical element imaging from unlimited as far as limited change far away, thus to produce infinitely as far as the target of limited change far away.
The LCD (90) of described collimating mirror (70), CCD (80) and having electronic chi at quarter forms a high precisive angle gauge and its resolution immobilizes.
Preferably, can embodiment as one, the LCD (90) that described having electronic carves chi is provided with right-angled intersection electronics scale mark.
Preferably, can embodiment as one, described CCD (80) is high-res video capture device.
Preferably, can embodiment as one, described eyeglass to be measured (60) is focal length or middle Jiao or short-focus mirror sheet.
Preferably, can embodiment as one, described collimating mirror (40) is for moving vertically; And described fixed lens (50) is fixed on axially.
Preferably, can embodiment as one, described eyeglass to be measured (60) is for rotating along described axial direction.
Correspondingly, present invention also offers a kind of measuring method, apply the inclined measurement mechanism of above-mentioned novel transmission-type center of lens and implement, comprise following operation steps:
Step one, described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40), described fixed lens (50) constitute described interior focusing variable focus package; Eyeglass to be measured (60) is placed in light path, by described collimating mirror (40) mobile on described axial direction until described target (20) blur-free imaging is on the LCD (90) of having electronic graduation;
Step 2, rotate described eyeglass to be measured (60), in rotation eyeglass to be measured (60) process, the LCD (90) of having electronic graduation can observe a sub-circular track;
Step 3, determine that the radius of described circular trace is the center deviation angle value of described eyeglass to be measured (60).
Beneficial effect of the present invention comprises:
1, at the inclined measurement mechanism of novel transmission-type center of lens that the embodiment of the present invention provides, angular instrument instead of measuring microscope is adopted to measure center of lens to be measured bigger than normal little, center of lens drift angle amount directly can be measured with angular instrument, without the need to converting, and angular instrument angle measurement accuracy is high, resolution is fixed;
2, adopt interior focusing variable focus package to provide target to eyeglass to be measured, extend measurement device scope, focal length, middle Jiao, short-focus mirror sheet can be taken into account;
3, utilize angular instrument and interior focusing variable focus package to detect center of lens partially, simple to operate, do not need additionally to increase attachment lens;
4, adopt electronic division to carve chi, electronic division carves chi no parallax, carves chi itself luminous, to the no requirement (NR) of sensed luminance environment;
Accompanying drawing explanation
Fig. 1 is for measuring the partially general light path principle schematic diagram of center of lens;
Fig. 2 is the light path principle schematic diagram of the inclined measurement mechanism of a kind of novel transmission-type center of lens provided by the invention;
Reference numeral 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 diagram in the present invention.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, in the concrete structure of the inclined measurement mechanism of above-mentioned novel transmission-type center of lens, device comprises interior focusing variable focus package, eyeglass to be measured and high precisive angle gauge successively, and three's optical axis is coaxial.
Wherein, described light source 10, target 20, parallel light tube collimating mirror 30, collimating mirror 40, fixed lens 50, eyeglass to be measured 60, collimating mirror 70 and CCD80 all order in axial direction upper settings;
Wherein, described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40) form into an interior focusing zoom system, pancreatic system with described fixed lens (50);
Wherein, the LCD90 of described collimating mirror 70, CCD80 and having electronic chi at quarter forms a high precisive angle gauge;
Below the inclined structural principle of above-mentioned novel transmission-type center of lens and R&D process are done and set forth:
As everyone knows, partially a kind of understanding more intuitively of center of lens is exactly the size that lens light axis and reference axis depart from, and sees Fig. 1.
No matter be the inclined pick-up unit of conventional center or the new equipment occurred in recent years, all detect by the frontlighting of light path shown in Fig. 1 road during detection, learn by analyzing in background technology, there are some critical defects in the method that this frontlighting road is detected, present situation plant produced demand can not be met, Given this, the present invention have adjusted mentality of designing.
An important principle is had in geometric optical theory, i.e. light path principle of reversibility, according to this principle, if by reverse for Fig. 1 light path, a target is placed at eyeglass focal plane to be measured, at eyeglass opposite side by outgoing directional light, if eyeglass to be measured exists center deviation, angular instrument can be utilized its angle of deviation size can be detected when rotating eyeglass to be measured.
In fact, the following relation of the inclined c of center of lens to be measured, angle of deviation δ and focal distance f ' have (center deviation angle is general all less, can approximate processing):
This formula also demonstrates the correctness of this thinking.
Owing to utilizing angular instrument to measure when detecting, obviously, resolution of the present invention is fixed, and can select suitable resolution as required, solves the unfixed problem of conventional apparatus resolution like this.
Analyze by background technology, the inclined measurement mechanism limitation of conventional center mainly contains two, and one is that device resolution is not fixed, and another is exactly that measurement range is little.
By above-mentioned analysis, device resolution not fixation problem solves, below groundwork be solve the little problem of measurement range.
Core concept of the present invention places a target at eyeglass focal plane to be measured, and from eyeglass opposite side injection directional light to be measured, then it is bigger than normal little to come inspection center with angular instrument.
Because eyeglass to be measured is of a great variety, specifically, there are focal length, middle Jiao, short Jiao, this just requires to design under device volume limited circumstances, can provide the target of various distance, for this reason, the present invention makes full use of geometric optical theory, devise a set of interior focusing variable focus package, can produce in minimum range of adjustment by the unlimited target as far as limited change far away.
In view of existing apparatus when cemented doublet (mainly) reading difficult problem in darkroom, the present invention has abandoned existing optics graticule, use OSD technology, have employed advanced electronic division, because electronic division itself is luminous, such the present invention is in operation to ambient brightness almost not requirement, and certainly, another advantage of electronic division does not have parallax.
Finally, present invention incorporates above-mentioned Research Thinking and devise index path in Fig. 2, as Fig. 2 shows, light source 10, target 20, parallel light tube collimating mirror 30, collimating mirror 40, fixed lens 50 forms an interior focusing variable focus package, by moving axially collimating mirror 40 until target 20 images on the object space focal plane of eyeglass 60 to be measured, by geometric optical theory, now from eyeglass 60 to be measured outgoing is directional light, collimating mirror 70, CCD80, the LCD90 of having electronic groove forms an angular instrument, rotate eyeglass 60 to be measured, if there is center deviation in eyeglass 60 to be measured, then in the process rotating eyeglass 60 to be measured, a sub-circular track can be observed on the LCD90 of having electronic groove, the radius of this circular trace is the center deviation of eyeglass 60 to be measured.
(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, when the inclined measurement mechanism of the novel transmission-type center of lens of concrete use is implemented to measure, can operate with reference to following method step:
Step one, described light source 10, described target 20, described parallel light tube collimating mirror 30, described collimating mirror 40, described fixed lens 50 constitute described interior focusing variable focus package; Eyeglass 60 to be measured is placed in light path, by described collimating mirror 40 mobile on described axial direction until described target 20 blur-free imaging is on the LCD90 of having electronic graduation;
Step 2, rotate described eyeglass to be measured 60, in rotation eyeglass 60 process to be measured, the LCD90 of having electronic graduation can observe a sub-circular track;
Step 3, determine that the radius of described circular trace is the center deviation angle value of described eyeglass to be measured 60.
In sum, the present invention is with the obvious advantage than the inclined measurement mechanism of conventional center, and resolution is fixed (10 seconds, resolution is the highest in the market); Measurement range is wide, can take into account focal length, middle Jiao, short-focus mirror sheet; To testing environment light brightness no requirement (NR); No parallax, does not need a point scribing chi focusing; Easy and simple to handle.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the inclined measurement mechanism of novel transmission-type center of lens, is characterized in that, comprise interior focusing variable focus package, eyeglass to be measured and high precisive angle gauge successively, three's optical axis is coaxial, wherein:
Described interior focusing variable focus package comprises light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), the fixed lens (50) that order is successively arranged vertically;
Described high precisive angle gauge comprises the LCD (90) of collimating mirror (70), CCD (80) and the having electronic chi at quarter that order is successively arranged vertically;
Wherein, described light source (10), target (20), parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50), eyeglass to be measured (60), collimating mirror (70) and CCD (80) all order in axial direction upper settings.
2. the inclined measurement mechanism of novel transmission-type center of lens according to claim 1, is characterized in that:
Described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40) and described fixed lens (50) form an interior focusing zoom system, pancreatic system;
Described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40) and described fixed lens (50) form an interior focusing zoom system, pancreatic system;
Described light source (10) illuminates described target (20), and target (20) is in described parallel light tube collimating mirror (30) focal plane; Described collimating mirror (40) is for moving vertically; Described fixed lens (50) maintains static; Described eyeglass to be measured (60) for being placed in light path, move axially described collimating mirror (40) until described having electronic carve the LCD (90) of chi upper clear there is the picture of target (20) till; Described eyeglass to be measured (60) is for rotating a circle, and the radius size of carving the track that picture that the LCD (90) of chi reads target (20) skips over from having electronic is the center deviation size of eyeglass to be measured.
3. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that:
Described collimating mirror (40) is for moving along on described axial direction, and other optical elements maintain static; Described target (20) for through parallel light tube collimating mirror (30), collimating mirror (40), fixed lens (50) optical element imaging from unlimited as far as limited change far away, thus to produce infinitely as far as the target of limited change far away.
4. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
The LCD (90) of described collimating mirror (70), CCD (80) and having electronic chi at quarter forms a high precisive angle gauge and its resolution immobilizes.
5. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
The LCD (90) of described having electronic chi at quarter is provided with right-angled intersection electronics scale mark.
6. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
Described CCD (80) is high-res video capture device.
7. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
Described eyeglass to be measured (60) is focal length or middle Jiao or short-focus mirror sheet.
8. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
Described collimating mirror (40) is for moving vertically; And described fixed lens (50) is fixed on axially.
9. the inclined measurement mechanism of novel transmission-type center of lens according to claim 2, is characterized in that,
Described eyeglass to be measured (60) is for rotating along described axial direction.
10. a measuring method, is characterized in that, application rights requires that described in any one of 1-9, the inclined measurement mechanism of novel transmission-type center of lens is implemented, and comprises following operation steps:
Step one, described light source (10), described target (20), described parallel light tube collimating mirror (30), described collimating mirror (40), described fixed lens (50) constitute described interior focusing variable focus package; Eyeglass to be measured (60) is placed in light path, by described collimating mirror (40) mobile on described axial direction until described target (20) blur-free imaging is on the LCD (90) of having electronic graduation;
Step 2, rotate described eyeglass to be measured (60), in rotation eyeglass to be measured (60) process, the LCD (90) of having electronic graduation can observe a sub-circular track;
Step 3, determine that the radius of described circular trace is the center deviation angle value of described eyeglass to be measured (60).
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| CN105091798B (en) | 2017-12-12 |
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