WO2017114122A1 - Dispositif de mesure de contrainte de surface de verre - Google Patents

Dispositif de mesure de contrainte de surface de verre Download PDF

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Publication number
WO2017114122A1
WO2017114122A1 PCT/CN2016/109031 CN2016109031W WO2017114122A1 WO 2017114122 A1 WO2017114122 A1 WO 2017114122A1 CN 2016109031 W CN2016109031 W CN 2016109031W WO 2017114122 A1 WO2017114122 A1 WO 2017114122A1
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WO
WIPO (PCT)
Prior art keywords
mirror
prism
light
detecting
detection
Prior art date
Application number
PCT/CN2016/109031
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English (en)
Chinese (zh)
Inventor
李俊峰
Original Assignee
南通杰福光学仪器科技有限公司
北京杰福科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 南通杰福光学仪器科技有限公司, 北京杰福科技有限公司 filed Critical 南通杰福光学仪器科技有限公司
Publication of WO2017114122A1 publication Critical patent/WO2017114122A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons

Definitions

  • the present disclosure relates to an optical detecting device, and in particular to a glass surface stress meter.
  • DSR differential surface refractometry
  • GASP surface grazing angle
  • Figures 1a and 1b show partial schematic views of optical detection of a prior art DSR-type glass surface stress meter.
  • the light emitted from the light source 1 is divergent, and the divergent light is irradiated onto the detecting surface 2a of the detecting prism 2, and is reflected at the interface between the detecting prism and the glass surface.
  • the incident light at the curved glass and the prism contact point 3a does not necessarily include the light having the total reflection angle, and thus the detection error Larger.
  • the present invention has been made in view of the above-described deficiencies in the prior art.
  • a glass surface stress meter comprising: a lighting unit,
  • the illumination unit includes a light source, a detection prism having a detection surface for bonding with a surface of the glass to be inspected for detection, and detection light incident from the illumination unit to the detection prism on the surface of the detection surface and the glass to be inspected The junction between them is totally reflected; and the imaging unit is arranged to receive the outgoing light from the detection prism and form a detection image, wherein the illumination unit further comprises a concentrating mirror formed and arranged to Light from the source is focused onto or near the detection surface of the detection prism.
  • the light source is a white LED light source.
  • the illumination unit further includes at least one of a pupil and a filter between the light source and the concentrating mirror.
  • the illumination unit may further comprise a mirror that directs light from the concentrating mirror to the detection prism.
  • the detection prism may include a reflective surface that reflects the detection light entering the detection prism and directs it to the detection surface.
  • the focal length of the condensing mirror is preferably no more than 25 mm.
  • the glass surface stress meter further includes a light shielding cover, the illumination unit, the detection prism, and the imaging unit are housed in the light shielding cover, and the light shielding cover is formed with a detection hole, and the detection surface of the detection prism is from the The detection hole is extended. More preferably, the detection hole is located at the bottom of the light shielding cover, and a light shielding seal is disposed around the detection hole between the light shielding cover and the detecting prism. The distance from which the detection surface of the detection prism protrudes from the detection aperture is preferably adjustable.
  • the imaging unit includes a first mirror, a lens group, a second mirror, an analysis mirror, and a photosensitive element disposed in sequence along the optical path, and the light shielding cover may be disposed through the light shielding cover to the first mirror Adjustments for position adjustment.
  • the glass surface stress meter further comprises: a data processing unit disposed in the light shielding cover, the photosensitive element is electrically connected to the data processing unit; and formed on or supported by the surface of the light shielding cover a display unit on the cover, the display unit being electrically connected to the data processing unit for displaying the detected image.
  • the imaging unit further includes a third mirror and a visual observation unit, the third mirror being disposed between the second mirror and the analysis mirror, which is capable of being in the first position and Rotating between two positions, in the first position, the third mirror directs light from the second mirror to the analysis mirror, and in the second position, the third mirror will come from the second The light of the mirror is directed to the visual observation unit, and the visual observation unit is exposed from the light shielding cover.
  • the third mirror being disposed between the second mirror and the analysis mirror, which is capable of being in the first position and Rotating between two positions, in the first position, the third mirror directs light from the second mirror to the analysis mirror, and in the second position, the third mirror will come from the second The light of the mirror is directed to the visual observation unit, and the visual observation unit is exposed from the light shielding cover.
  • the glass surface stress meter according to the present invention concentrates light from a light source onto or near the detection surface of the detection prism by providing a condensing mirror, which contributes to an improvement in detection accuracy.
  • 1a is a partial schematic view of a prior art glass surface stress meter for detecting curved glass
  • Figure 1b is a partial schematic view of a prior art glass surface stress meter for detecting flat glass
  • FIG. 2a is a partial schematic view of a glass surface stress meter for detecting a curved glass according to an embodiment of the present invention
  • 2b is a partial schematic view of a glass surface stress meter for detecting a flat glass according to an embodiment of the present invention
  • FIG. 3 is a schematic structural view of a glass surface stress meter according to a first embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a glass surface stress meter according to a modification of the first embodiment
  • Figure 5 is a schematic structural view of a glass surface stress meter according to another modification of the first embodiment
  • Figure 6 is a schematic view showing the structure of a glass surface stress meter according to a second embodiment of the present invention.
  • the glass surface stress meter according to the present invention adds a concentrating mirror 12 for concentrating the light beam after the light source 11.
  • the light emitted by the light source 11 passes through the convergence of the condensing mirror 12, optionally through the inverse of the mirror 13 Shot, incident detection prism 20.
  • the light is focused on or near the detecting surface 20a of the detecting prism 20.
  • the glass surface stress meter according to the present invention is placed on the glass such that the detecting surface 20a of the detecting prism 20 is attached to the glass surface.
  • a suitable index matching medium such as a matching solution or gel, can be applied between the detection prism 20 and the glass surface.
  • Light from the light source is focused by the concentrating mirror to the abutment (e.g., contact point 30a with the curved glass) such that light is totally reflected at the junction between the detection surface and the surface of the glass being inspected.
  • the totally reflected light carries information on the glass birefringence capability of the glass surface stress and can be detected by subsequent imaging units.
  • a concentrating mirror in a glass surface stress meter converges light from a source, typically a diverging beam, onto or near the detection surface of the detection prism.
  • a source typically a diverging beam
  • the glass surface stress meter according to the present invention can better adapt to the case where the refractive index change caused by the glass surface stress is large. In addition, this helps to reduce the influence of scratches or smudges on the detection surface of the detecting prism on the detection result.
  • FIG 3 is a schematic view showing the structure of a glass surface stress meter according to a first embodiment of the present invention.
  • the illustrated glass surface stress gauge includes a lighting unit, a detection prism 200, and an imaging unit.
  • the glass surface stress meter according to the present invention may further include a cover 400, and the cover is preferably a light shielding cover.
  • the light shielding housing 400 houses the above-described illumination unit, detection prism, and imaging unit that shields stray light from the outside to define the shape of the stress gauge.
  • the illumination unit includes a light source 101, a diaphragm 102, a color filter 103, a condensing mirror 104, and a mirror 105 which are sequentially disposed.
  • the light source 101 used by the lighting unit is preferably an LED light source.
  • an aperture 102 is provided for adjusting the light intensity. If the light intensity of the light source 101 is appropriate, the diaphragm may not be used.
  • the color filter 103 may be, for example, an interference filter for purifying light emitted from the light source to improve detection accuracy. If the monochromaticity of the light source 101 satisfies the requirement of detection accuracy, the filter 103 may not be used.
  • the light source 101 is, for example, an LED white light source, and passes through the aperture 102 and the filter. The mirror 103 adjusts and improves the characteristics of the light for detection, thereby ensuring the detection accuracy.
  • Condenser 104 is formed and arranged to focus light from the source onto or near detection surface 200a of detection prism 200.
  • the condensing mirror 104 can be constituted, for example, by a convex lens.
  • the focal length of the condensing mirror and the object distance and the image distance are calculated by the optical path such that the light enters the prism and converges on or near the detecting surface of the detecting prism, so that the optical detecting surface is small.
  • the focal length of the concentrating mirror is preferably no more than 25 mm.
  • the mirror 105 can be selectively disposed for folding the optical path, thereby reducing the overall volume of the stress meter.
  • the invention is not limited to the use or non-use of the mirror 105.
  • the detecting prism 200 may be a triangular prism, a rectangular prism whose incident surface is a circular arc shape, or the like.
  • the detecting prism 200 shown in Fig. 3 is a square prism.
  • the detecting prism 200 has a detecting surface 200a for bonding to the surface of the glass to be inspected.
  • the light incident on the prism can be made into a monochromatic light, which reduces the adverse effect of the spectral width of the light source on the measurement after the detection light is emitted from the glass-prism interface.
  • the incident angle of the light source is determined by scientific calculation, and the use of the detection prism with the corresponding parameters avoids the operator's selection in multiple steps and affects the measurement accuracy.
  • a detection hole 401 may be opened in the light shielding cover 400, and the detection surface 200a of the detection prism protrudes from the detection hole 401.
  • the distance from which the detecting surface 200a of the detecting prism protrudes from the detecting hole 401 is adjustable.
  • the exterior of the light-shielding cover 400 may have adjustment means connected to the detection prism 200 for adjusting the distance of the detection prism from the light-shielding cover.
  • the detecting hole 401 is located at the bottom of the light shielding cover, and a light shielding seal (not shown) is disposed around the detecting hole 401 between the light shielding housing 400 and the detecting prism 200 to prevent stray light from entering the detecting prism via the detecting hole 401. .
  • the imaging unit includes a lens group 301, an analysis mirror 302, and a photosensitive element 303 which are sequentially disposed in accordance with the optical path.
  • the imaging unit may further comprise at least two mirrors.
  • the imaging unit includes a first mirror 300a, a second mirror 300b, and a third mirror 300c.
  • the first mirror 300a is placed between the detecting prism 200 and the lens group 301 and adjacent to the detecting prism 200 to reflect the light emitted from the detecting prism into the lens group 301.
  • Second anti The reflecting surfaces of the mirror 300b and the third mirror 300c are oppositely disposed, and are disposed between the lens group 301 and the analyzing mirror 302 for guiding the light focused by the lens group 301 to the analyzing mirror 302, and then passing through the analyzing mirror.
  • a photosensitive element 303 such as CCD/CMOS/PMT is imaged, and a step difference image of the surface stress of the reaction glass is exhibited on the photosensitive element.
  • the position of the first mirror 300a adjacent to the detecting prism 200 can be adjusted by the user via the adjusting member 300d, thereby adjusting the angle of the light entering the lens group 301, so that the critical angle of light passes through the lens group and is irradiated to the photosensitive member.
  • the adjustment member 300d is preferably a screw to improve ease of use and adjustment accuracy.
  • the analysis mirror 302 can be realized, for example, by splicing two mutually perpendicular polarizing plates or by using one or more polarization beam splitting prisms.
  • a data processing unit (not shown) electrically connected to the photosensitive element 303 processes the step difference image to obtain a surface stress of the glass.
  • the data processing unit can be implemented by a general purpose computer having data processing software, or by using a dedicated small data processor, such as a microcontroller, an FPGA, a CPLD, or the like.
  • a small data processor can be integrated in the photosensitive element 303.
  • the glass surface stress meter may include a display unit formed on or protruding from the surface of the light shielding cover.
  • the display unit may include a graphical image interface that displays the detection result, and controls a small data processor built into the detection device to perform physical or virtual keys such as initialization, clearing, calibration, fault detection, and the like.
  • the display unit can be a touch display.
  • the third mirror 300c may be omitted, or the third mirror 300c may be a rotatable mirror.
  • Fig. 4 shows a glass surface stress meter according to a variant of the first embodiment, wherein the third mirror is arranged as a rotatable mirror.
  • the imaging unit further includes a visual observation unit 500.
  • the third mirror 300c is disposed between the second mirror 300b and the analysis mirror 302, and the visual observation unit 500 and the photosensitive unit 303 are conjugate with respect to the third mirror 300c.
  • the third mirror 300c is rotatable between a first position and a second position. In the first position, the third mirror 300c directs light from the second mirror 300b to the analysis mirror 302, causing the photosensitive element 303 to perform image recording for electronic measurement, similar to the operation of the DSLR camera. In the second position, the third mirror 300c will be in the future The light from the second mirror 300b is guided to the visual observation unit 500 so that the result can be observed and manually calculated by the visual observation unit 45.
  • the visual observation unit 500 is exposed from the light shielding cover 400.
  • Fig. 5 shows a glass surface stress meter according to another modification of the first embodiment, which is substantially the same as the glass surface stress meter according to the first embodiment, except that optionally included in the first embodiment
  • the display unit formed on or protruding from the surface of the light-shielding cover is replaced by a separate display unit 600 supported on the light-shielding cover.
  • the display unit 600 is supported on the light shielding cover 400 through the bracket 601, and is electrically connected to the aforementioned data processing unit.
  • the display unit 600 may include a graphical image interface that displays the detection result, and controls a small data processor built into the detection device to perform physical or virtual keys such as initialization, clearing, calibration, fault detection, and the like.
  • the display unit can be a touch display.
  • the display unit 600 is further integrated with a computing module for performing at least part of the data processing task.
  • the glass surface stress meter of the present invention is not limited to the particular function or configuration of the imaging unit described above.
  • the imaging unit includes the analysis mirror and the photosensitive element in the above first embodiment and its modifications
  • the glass surface stress meter according to the present invention may have any other suitable form of imaging unit.
  • the imaging unit may be simply implemented as a visual observation system for directly observing interference fringes generated by totally reflected light by the naked eye, may not include mirrors or include more or fewer mirrors, and the like.
  • FIG. 6 shows a glass surface stress meter according to a second embodiment of the present invention, and the rest of the glass surface stress gauges according to the first embodiment are substantially the same, the main difference being that the mirror 105 is detected by the reflective surface in the prism 200. Replaced by 200b. Specifically, as shown in FIG. 6, after the light from the illumination unit enters the detecting prism 200, it is reflected at the reflecting surface 200b, thereby being guided to the detecting surface 200a of the detecting prism 200.
  • the reflective surface 200b is preferably a lower bottom side of the detection prism 200.
  • the space occupied by the entire optical path can be further shortened, miniaturization is achieved; at the same time, the mounting is simplified, and the detection due to the positional error of the mirror 105 with respect to the detecting prism is avoided. Reduced accuracy.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un dispositif de mesure de contrainte de surface de verre qui comprend une unité d'éclairage comprenant une source de lumière (101) ; un prisme d'essai (200) ; et une unité de formation d'image. Le prisme d'essai (200) comprend une surface d'essai (200a) utilisée pour fixation à une surface de verre devant être testée (30). Une lumière d'essai pénètre dans le prisme d'essai (200) depuis l'unité d'éclairage et est entièrement réfléchie à un emplacement de fixation entre la surface d'essai (200a) et la surface du verre devant être testé (30). La formation d'image est agencée pour recevoir une lumière sortant du prisme d'essai (200) pour former une image d'essai. L'unité d'éclairage comprend en outre une lentille convergente (104) formée et agencée pour faire converger des rayons lumineux depuis la source de lumière (101) vers ou à proximité de la surface d'essai (200a) du prisme d'essai (200). Le dispositif de mesure de contrainte de surface de verre fait converger les rayons lumineux provenant de la source de lumière (101) vers ou à proximité de la surface d'essai du prisme d'essai (200) en utilisant la lentille convergente (104), de manière à permettre une augmentation de la précision d'essai.
PCT/CN2016/109031 2015-12-29 2016-12-08 Dispositif de mesure de contrainte de surface de verre WO2017114122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201511019164.XA CN106932130A (zh) 2015-12-29 2015-12-29 玻璃表面应力仪
CN201511019164.X 2015-12-29

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WO2017114122A1 true WO2017114122A1 (fr) 2017-07-06

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JPH11281501A (ja) * 1998-03-30 1999-10-15 Orihara Seisakusho:Kk 表面応力測定装置
US20030169417A1 (en) * 2002-03-08 2003-09-11 Atkinson Robert C. Optical configuration and method for differential refractive index measurements
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CN204535899U (zh) * 2015-02-17 2015-08-05 李俊峰 玻璃表面应力检测装置
CN105758566A (zh) * 2016-04-11 2016-07-13 李俊峰 玻璃表面应力仪
CN205449356U (zh) * 2015-12-29 2016-08-10 北京杰福科技有限公司 玻璃表面应力仪
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US9109881B2 (en) * 2013-06-17 2015-08-18 Corning Incorporated Prism coupling methods with improved mode spectrum contrast for double ion-exchanged glass
CN203490010U (zh) * 2013-09-27 2014-03-19 中国建材检验认证集团股份有限公司 一种用于检测钢化玻璃表面应力的应力仪
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Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11281501A (ja) * 1998-03-30 1999-10-15 Orihara Seisakusho:Kk 表面応力測定装置
US20030169417A1 (en) * 2002-03-08 2003-09-11 Atkinson Robert C. Optical configuration and method for differential refractive index measurements
TW201414997A (zh) * 2012-09-28 2014-04-16 Corning Inc 用於測量在玻璃及玻璃陶瓷中之雙折射的系統和方法
CN103644990A (zh) * 2013-12-13 2014-03-19 苏州精创光学仪器有限公司 紧凑型玻璃表面应力测量仪
CN204166209U (zh) * 2014-10-27 2015-02-18 中国建材检验认证集团股份有限公司 一种偏振装置及玻璃应力检测装置
CN104330359A (zh) * 2014-11-03 2015-02-04 苏州精创光学仪器有限公司 玻璃应力测量装置
CN204535899U (zh) * 2015-02-17 2015-08-05 李俊峰 玻璃表面应力检测装置
CN205449356U (zh) * 2015-12-29 2016-08-10 北京杰福科技有限公司 玻璃表面应力仪
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CN205642680U (zh) * 2016-04-11 2016-10-12 李俊峰 玻璃表面应力仪

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