CN204301970U - Lens centre detector - Google Patents
Lens centre detector Download PDFInfo
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- CN204301970U CN204301970U CN201420768883.6U CN201420768883U CN204301970U CN 204301970 U CN204301970 U CN 204301970U CN 201420768883 U CN201420768883 U CN 201420768883U CN 204301970 U CN204301970 U CN 204301970U
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Abstract
This technology provides the lens centre detector that a kind of structure is simple, can detect optical center of lens and geometric center deviation size fast and efficiently, it is particularly suitable for the detection of small size lens, is particularly suitable for the detection that side is the small size lens of the curved surface that plane or curvature are very little.This lens centre detector, comprises rotating shaft, lens one side and rotating shaft end thereof contacts, and rotating shaft arranges the vacuum absorption device being used for lens being adsorbed on rotating shaft one end; It comprises light source, condenser, cross-graduation plate, enlarging objective, imageing sensor, image display; The light beam that light source sends is irradiated to the another side of lens through cross-graduation plate and is reflected after condenser optically focused, and imageing sensor measured lens ball sent into by the cross picture that reverberation is formed after enlarging objective, and shows on image display.
Description
Technical field
This technology relates to lens centre detector.
Background technology
In lens are produced, the optical centre (optical axis) of lens and the deviation of geometric center (geometrical axis) are very important indexs.For lens processing, the two sides (being generally curved surface) of the lens generally first ground, in the periphery (cylindrical) of grinding lens.The line of centres of two sides defines optical axis, and the axis of cylindrical defines geometrical axis.Geometrical axis and optical axis coincidence or deviation the smaller the better.For the lens that the ratio of curvature of side is larger, the general Self-centering Action of side that adopts completes clamping, then with grinding periphery, ensures the uniformity of geometric center and optical centre.But be the curved surface that plane or curvature are very little for side, because angle of friction is very little, form self-locking, the self-centering of side is difficult to realize.Especially small-sized lens, also cannot effective clamping.Both allow to clamping, and also can cause interference to the emery wheel of grinding.So be the lens of the curved surface that plane or curvature are very little for side, how especially small-sized lens, ensure that geometric center overlaps with optical centre man-hour and be difficult to realize adding.
Summary of the invention
The object of this technology is to provide the lens centre detector that a kind of structure is simple, can detect optical center of lens and geometric center deviation size fast and efficiently, it is particularly suitable for the detection of small size lens, is particularly suitable for the detection that side is the small size lens of the curved surface that plane or curvature are very little.
This lens centre detector, comprises rotating shaft, lens one side and rotating shaft end thereof contacts, and rotating shaft arranges the vacuum absorption device being used for lens being adsorbed on rotating shaft one end; It comprises light source, condenser, cross-graduation plate, enlarging objective, imageing sensor, image display; The light beam that light source sends is irradiated to the another side of lens through cross-graduation plate and is reflected after condenser optically focused, and imageing sensor measured lens ball sent into by the cross picture that reverberation is formed after enlarging objective, and shows on image display.
The beneficial effect of the lens centre detector described in this technology: because during processing excircles, lens are fixed in rotating shaft.So the geometric center of lens and the dead in line of rotating shaft.If the optical axis of lens does not overlap with shaft axis, when lens are adsorbed in rotating shaft, during rotating shaft one week, optical axis will rotate one week by axis around the shaft, and the cross picture formed by enlarging objective like this will rotate one week.The radius size (scope of beating of cross picture) of cross picture circumference motion track reflects the degree that lens axis departs from shaft axis.It is larger that lens axis departs from shaft axis distance, and the radius of cross picture circumference motion track is larger.This lens centre detector structure is simple, easy to use, is suitable for the Spot detection that side is the small size lens of the curved surface that plane or curvature are very little.
Above-mentioned lens centre detector, it also comprises semi-transparent semi-reflecting lens, speculum; The light beam that light source sends irradiates semi-transparent semi-reflecting lens through cross-graduation plate after condenser optically focused, again through the reflection of semi-transparent semi-reflecting lens, the reflected illumination of speculum to the another side of lens, entered enlarging objective through the reflection of speculum, the lens of semi-transparent semi-reflecting lens again by the reverberation that lens another side is reflected.
Above-mentioned lens centre detector, vacuum absorption device is out at the vacuum chamber communicated with rotating shaft one end of spindle central, the air extractor that communicates with vacuum chamber.
Above-mentioned lens centre detector, light source is LED lamp.
This technology provide simultaneously a kind of can ensure to process lens geometric center and the very little lens processing method of optical centre deviation, it is particularly suitable for the processing of small size lens, is particularly suitable for the processing that side is the small size lens of the curved surface that plane or curvature are very little.
Lens processing method described in this technology, comprises the steps: 1), use lens centre detector described in claim 1, first lens are adsorbed on one end of rotating shaft, rotating shaft one week, whether the scope of beating of observation cross picture in the error required; If the scope of beating of cross picture exceedes the error of requirement, by the adjustment position of lens in rotating shaft, make the scope of beating of the cross picture observed during rotating shaft one week in the error required; 2), while then drive shaft is rotated, the cylindrical of lens is processed.
Described lens processing method, step 2) in the absolute value of negative pressure of vacuum absorption device absorption lens be greater than step 1).
The beneficial effect of this lens processing method: distance is larger because lens axis departs from shaft axis, the radius of cross picture circumference motion track is larger.So, in step 1), by the adjustment position of lens in rotating shaft, make the scope of beating of cross picture in error range, namely ensure that the precision that geometric center overlaps with optical centre.And then external circle of lens is processed (as grinding), because lens are motionless relative to the position of rotating shaft in process, and the axis coaxle of the cylindrical processed and axis of rotation, the geometric center this ensures that thering the lens processed overlaps with optical centre.
Generally, because the center deviation of lens is very little, when rotating lens, the scope of beating of cross picture is very little, if do not amplified by enlarging objective, is difficult to differentiate.After the amplification of enlarging objective, define the cross picture that displacement is amplified, be convenient to observe.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of lens centre detector in using state.
Detailed description of the invention
Below in conjunction with drawings and Examples, this technology is further described.
See the lens centre detector of Fig. 1, comprise a rotating shaft 1 driven by drive unit, lens 2 left surface contacts with rotating shaft right-hand member, and vacuum chamber 31 is opened at spindle central and communicated with rotating shaft right-hand member, and vavuum pump 32 communicates with vacuum chamber.Vacuum chamber 31, vavuum pump 32 etc. constitute vacuum absorption device 3.
A speculum 4 at 45 ° with shaft axis is set on the right side of lens, is disposed with semi-transparent semi-reflecting lens 5, enlarging objective 6, cmos imageing sensor 7 in the below of speculum.The output of cmos imageing sensor connects image display (not shown).Cross-graduation plate 8, condenser 9, LED lamp 10 is disposed with on the left of semi-transparent semi-reflecting lens 5.
The light beam that LED lamp sends irradiates semi-transparent semi-reflecting lens through cross-graduation plate after condenser optically focused, again through the reflection of semi-transparent semi-reflecting lens, the reflected illumination of speculum to the right flank of lens, enlarging objective is entered through the reflection of speculum, the lens of semi-transparent semi-reflecting lens again by the reverberation that lens right flank reflects, the cross picture formed after enlarging objective by image capture sensor, and is delivered to image display display.
During Cylindrical Grinding Processes to emery wheel 11 lens, step is as follows: 1), with vavuum pump bleed to vacuum chamber, makes vacuum chamber form less negative pressure, lens is adsorbed on the right-hand member of rotating shaft.The absolute value of negative pressure is smaller, to make to use less external force just can the position of mobile lens.Then rotating shaft at least one week, the scope of beating of cross picture is observed whether in the error required; If the scope of beating of cross picture exceedes the error of requirement, with the position of the whole lens of hand adjustment in rotating shaft, and then rotating shaft at least one week, observe the scope of beating of cross picture whether in the error required; The like, adjust the position of lens gradually, make the scope of beating of the cross picture observed during rotating shaft one week in the error required.2) bled to vacuum chamber by vavuum pump again, make vacuum chamber form larger negative pressure, the absolute value of negative pressure wants large, can not move under the effect of the grinding force of emery wheel to make lens.Rotated by drive unit drive shaft, with emery wheel, grinding is carried out to the cylindrical of lens.
Claims (4)
1. lens centre detector, is characterized in that: comprise rotating shaft, lens one side and rotating shaft end thereof contacts, and rotating shaft arranges the vacuum absorption device being used for lens being adsorbed on rotating shaft one end; It also comprises light source, condenser, cross-graduation plate, enlarging objective, imageing sensor, image display; The light beam that light source sends is irradiated to the another side of lens through cross-graduation plate and is reflected after condenser optically focused, and imageing sensor measured lens ball sent into by the cross picture that reverberation is formed after enlarging objective, and shows on image display.
2. lens centre as claimed in claim 1 detector, it is characterized in that: further comprising semi-transparent semi-reflecting lens, speculum; The light beam that light source sends irradiates semi-transparent semi-reflecting lens through cross-graduation plate after condenser optically focused, again through the reflection of semi-transparent semi-reflecting lens, the reflected illumination of speculum to the another side of lens, entered enlarging objective through the reflection of speculum, the lens of semi-transparent semi-reflecting lens again by the reverberation that lens another side is reflected.
3. lens centre as claimed in claim 1 detector, is characterized in that: vacuum absorption device is out at the vacuum chamber communicated with rotating shaft one end of spindle central, the air extractor that communicates with vacuum chamber.
4. lens centre as claimed in claim 1 detector, is characterized in that: light source is LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420768883.6U CN204301970U (en) | 2014-12-09 | 2014-12-09 | Lens centre detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420768883.6U CN204301970U (en) | 2014-12-09 | 2014-12-09 | Lens centre detector |
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| Publication Number | Publication Date |
|---|---|
| CN204301970U true CN204301970U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420768883.6U Active CN204301970U (en) | 2014-12-09 | 2014-12-09 | Lens centre detector |
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| CN (1) | CN204301970U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458213A (en) * | 2014-12-09 | 2015-03-25 | 南京东利来光电实业有限责任公司 | Lens center detector and lens processing method |
| CN107339955A (en) * | 2017-01-07 | 2017-11-10 | 深圳市灿锐科技有限公司 | A kind of inclined detecting instrument in high-precision lenses center and its measuring method |
-
2014
- 2014-12-09 CN CN201420768883.6U patent/CN204301970U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458213A (en) * | 2014-12-09 | 2015-03-25 | 南京东利来光电实业有限责任公司 | Lens center detector and lens processing method |
| CN107339955A (en) * | 2017-01-07 | 2017-11-10 | 深圳市灿锐科技有限公司 | A kind of inclined detecting instrument in high-precision lenses center and its measuring method |
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