CN201149522Y - Apparatus of multiple times focus for measuring ultrasonic suspending field - Google Patents
Apparatus of multiple times focus for measuring ultrasonic suspending field Download PDFInfo
- Publication number
- CN201149522Y CN201149522Y CNU2007203113454U CN200720311345U CN201149522Y CN 201149522 Y CN201149522 Y CN 201149522Y CN U2007203113454 U CNU2007203113454 U CN U2007203113454U CN 200720311345 U CN200720311345 U CN 200720311345U CN 201149522 Y CN201149522 Y CN 201149522Y
- Authority
- CN
- China
- Prior art keywords
- light
- semi
- lens
- reflecting mirror
- convex lens
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Holo Graphy (AREA)
Abstract
The utility model relates to an ultrasonic levitation field measurement device with focal length of multiple times, which is technically characterized in that: a beam splitting prism forming a first beam and a second beam is arranged in light paths emitted by a laser; an expanded beam device and a holophote are arranged in the light path of the first beam sequentially, an ultrasonic field to be tested is positioned between the expanded beam device and the holophote in the light paths, a partially transparent and reflecting mirror is disposed between the expanded beam device and the ultrasonic field for reflecting object light to the other side vertical to the direction of the first beam; an expanded beam device which can change beam into parallel reference light is disposed in the light path of the second beam; and a convex lens which forms interference light with beam and reference light and a planar array CCD1 which records the digital hologram are arranged at the position parallel to the partially transparent and reflecting mirror. The measurement device uses a multiplication light path to detect the interference fringe distribution caused by the tiny refractive index change of air by sound field disturbance, so the measurement results are more intuitive and precise.
Description
Technical field
The utility model relates to a kind of ultrasound suspending field measurement device of many times of focal lengths, utilizes Digital Holography to realize the measurement of ultrasound suspending field.
Background technology
Because ultrasound suspending field is the stationary field that sound wave forms in air, can not directly receive with eyes or video-unit, add that detection process can not disturb sound field, make conventional detection instrument to use.Again because after introducing measuring element, can exert an influence and be difficult to realize measurement of full field the acoustic levitation field.So, up to the present, the research work of ultrasound suspending field is focused mostly in the numerical evaluation of acoustic levitation theory.Human traditional optical holographic method such as the Zhang Lin of Northwestern Polytechnical University have carried out measuring (Zhang Lin, Li Enpu, Feng Wei to the acoustic levitation field distribution first, Hong Zhenyu, Xie Wenjun, Ma Yanghua, the laser holographic interferometry research of acoustic levitation process, Acta Physica Sinica, 54 (5) (2005)).But, because the limitation of its method, measurement result is more coarse, this method with holographic dry plate as recording medium, need through complicated physics and wet-chemical treatment process, the influence that the information of record and record effect very easily are subjected to manual operation, and information processing means is limited, can not demodulate the phase information of interference field; Subsequently, people such as Zhang Lin (Zhang Lin, the laser holographic interferometry research of acoustic levitation process, master thesis, Northwestern Polytechnical University, (2005) further the burnt light paths of the two copolymerization of Applied Digital holographic method and employing are measured ultrasound suspending field, because the restriction of its light channel structure, the sensitivity of measuring the weak field of behaviour is low, and measurement range is fixing non-adjustable, measuring process is complicated, is difficult to accomplish quantitative test.
In a word, because ultrasound suspending field is low in weak field of behaviour measuring process medium sensitivity, so existing side measurement amount process is complicated, and measurement range is fixing non-adjustable.
The utility model content
The technical matters that solves
For fear of the deficiencies in the prior art part, the utility model proposes a kind of ultrasound suspending field measurement device of many times of focal lengths, it is low in weak field of behaviour measuring process medium sensitivity to overcome ultrasound suspending field, and measurement range is fixing non-adjustable, and measuring process is than complicated problems.
Technical scheme
Technical characterictic of the present utility model is: device comprises laser instrument 14,8, two parallel beam expand devices of beam splitting arrangement 7,9, semi-transparent semi-reflecting lens 6,12, completely reflecting mirror 5,10,16, convex lens 2,3,4,11, attenuator 15 and area array CCD 1; The completely reflecting mirror 16 of attenuator 15 and change optical path direction is set in the light path that laser instrument 14 sends, the beam splitting arrangement 8 that forms first light beam and second light beam is set afterwards; In the light path of first light beam, set gradually parallel beam expand device 7 and completely reflecting mirror 5, ultrasonic field to be measured is arranged in light path between parallel beam expand device 5 and the completely reflecting mirror 5, between parallel beam expand device 5 and ultrasonic field to be measured a semi-transparent semi-reflecting lens 6 that thing light is reflexed to an other side vertical with first beam direction is set; In the light path of second light beam, a parallel beam expand device 9 that light beam is become parallel reference light is set; Set gradually the completely reflecting mirror 10 and the semi-transparent semi-reflecting lens 12 that change optical path direction afterwards; Between semi-transparent semi-reflecting lens 12 and semi-transparent semi-reflecting lens 6, convex lens 4 are set, convex lens 11 are set, between semi-transparent semi-reflecting lens 12 and convex lens 2, convex lens 3 are set at semi-transparent semi-reflecting lens 12 and completely reflecting mirror 10; Interfere in the light path of back formation at two-beam, set gradually the convex lens 2 of interference pattern imaging and the area array CCD 1 of record digital hologram.
Described beam splitting arrangement 8 is fixing splitting ratio beam splitter, or the adjustable beam splitter of splitting ratio.
Described parallel beam expand device 7,9 is a beam expanding lens, or lens combination.
Described line array CCD 1 is the charge-coupled image sensor of one side array distribution.
Beneficial effect
Superiority compared to existing technology is: (1) is not owing to there is disturbance flow field such as instrument probe in the process of utilizing this measurement mechanism that ultrasonic field is measured, light beam does not cause interference to it after by ultrasound suspending field to be measured, thereby avoids producing therefrom error; (2) owing to the noninertia of light, this measurement mechanism can be used to study the transient process of ultrasonic field, realizes its instantaneous record; (3) this measurement mechanism utilization multiplication light path distributes thereby can survey the interference fringe that small variations in refractive index that the sound field disturbance produces air causes, and makes measurement result directly perceived more, accurately.
Description of drawings
Fig. 1: the structural representation of measurement mechanism embodiment
The 1-area array CCD; The 2-convex lens; The 3-convex lens; The 4-convex lens; The 5-completely reflecting mirror; The 6-semi-transparent semi-reflecting lens; 7-beam-expanding collimation device; The 8-beam splitter; 9-beam-expanding collimation device; The 10-completely reflecting mirror; The 11-convex lens; The 12-semi-transparent semi-reflecting lens; The 13-computing machine; The 14-gas laser; The 15-attenuator; The 16-completely reflecting mirror;
Embodiment
Now in conjunction with the accompanying drawings the utility model is further described:
Embodiment is as shown in the figure: comprise semiconductor laser 14, attenuator 15, completely reflecting mirror 5,10,16, beam splitter 8, beam-expanding collimation device 7,9, semi-transparent semi-reflecting lens 6,12, convex lens 2,3,4,11, line array CCD 1 and ultrasonic to be measured A.
The second bundle light is reflected by completely reflecting mirror 10 after being expanded bundle and be collimated into directional light by beam-expanding collimation device 9, is imaged on the CCD1 through convex lens 2 after planoconvex lens 11 and semi-transparent semi-reflecting lens 12 and first beam optical path interfere.3,4 and 11 pairs of thing light of convex lens and reference light have carried out convergent-divergent simultaneously, and then interfere.Planoconvex lens 2 is imaged on the CCD.
Because CCD1 is between one times of focal length of convex lens 2 and two times of focal lengths.Regulate the distance between convex lens 2 and CCD1 and the ultrasound suspending field A three to be measured, make ultrasound suspending field A to be measured through first convex lens 2 afterwards blur-free imagings on CCD1.In the CCD1 recording interval, regulate first and second angle of beams, make the document image frequency spectrum to separate, take respectively then and do not add ultrasound suspending field and the digital hologram interferogram that adds under two kinds of situations of ultrasound suspending field, at last, the digital hologram of two kinds of situations is carried out numerical value reconstruct by computing machine 13 by means such as fast fourier transform algorithm and Digital Image Processing, and the digital hologram that promptly can obtain the acoustic levitation field reproduces picture.
Claims (4)
1. the ultrasound suspending field measurement device of many times of focal lengths, it is characterized in that: device comprises laser instrument (14), beam splitting arrangement (8), two parallel beam expand devices (7), (9), semi-transparent semi-reflecting lens (6), (12), completely reflecting mirror (5), (10), (16), convex lens (2), (3), (4), (11), attenuator (15) and area array CCD (1); The completely reflecting mirror (16) of attenuator (15) and change optical path direction is set in the light path that laser instrument (14) sends, the beam splitting arrangement (8) that forms first light beam and second light beam is set afterwards; In the light path of first light beam, set gradually parallel beam expand device (7) and completely reflecting mirror (5), ultrasonic field to be measured is arranged in light path and is arranged between parallel beam expand device (5) and the completely reflecting mirror (5), between parallel beam expand device (5) and ultrasonic field to be measured a semi-transparent semi-reflecting lens (6) that thing light is reflexed to an other side vertical with first beam direction is set; In the light path of second light beam, a parallel beam expand device (9) that light beam is become parallel reference light is set; Set gradually the completely reflecting mirror (10) and the semi-transparent semi-reflecting lens (12) that change optical path direction afterwards; Between semi-transparent semi-reflecting lens (12) and semi-transparent semi-reflecting lens (6), convex lens (4) are set, convex lens (11) are set, between semi-transparent semi-reflecting lens (12) and convex lens (2), convex lens (3) are set at semi-transparent semi-reflecting lens (12) and completely reflecting mirror (10); Interfere in the light path of back formation at two-beam, set gradually the convex lens (2) of interference pattern imaging and the area array CCD (1) of record digital hologram.
2. the ultrasound suspending field measurement device of many times of focal lengths according to claim 1 is characterized in that: described beam splitting arrangement (8) is fixing splitting ratio beam splitter, or the adjustable beam splitter of splitting ratio.
3. the ultrasound suspending field measurement device of many times of focal lengths according to claim 1 is characterized in that: described parallel beam expand device (7), (9) are beam expanding lens, or lens combination.
4. the ultrasound suspending field measurement device of many times of focal lengths according to claim 1 is characterized in that: described line array CCD (1) is the charge-coupled image sensor of one side array distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203113454U CN201149522Y (en) | 2007-12-21 | 2007-12-21 | Apparatus of multiple times focus for measuring ultrasonic suspending field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203113454U CN201149522Y (en) | 2007-12-21 | 2007-12-21 | Apparatus of multiple times focus for measuring ultrasonic suspending field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201149522Y true CN201149522Y (en) | 2008-11-12 |
Family
ID=40117293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203113454U Expired - Fee Related CN201149522Y (en) | 2007-12-21 | 2007-12-21 | Apparatus of multiple times focus for measuring ultrasonic suspending field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201149522Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411997A (en) * | 2019-07-30 | 2019-11-05 | 西安电子科技大学 | A kind of micro- reaction fluorescence detection device of real-time ultrasound and fluorescence detection method |
-
2007
- 2007-12-21 CN CNU2007203113454U patent/CN201149522Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411997A (en) * | 2019-07-30 | 2019-11-05 | 西安电子科技大学 | A kind of micro- reaction fluorescence detection device of real-time ultrasound and fluorescence detection method |
| CN110411997B (en) * | 2019-07-30 | 2021-09-14 | 西安电子科技大学 | Real-time ultrasonic micro-reaction fluorescence detection device and fluorescence detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102221342B (en) | Method for measuring object deformation by time-domain multi-wavelength heterodyne speckle interference | |
| CN101285702A (en) | Ultrasound suspending field visualized measurement method and its measuring systems | |
| Pu et al. | An advanced off-axis holographic particle image velocimetry (HPIV) system | |
| CN106292238B (en) | A kind of reflective off-axis digital holography micro-measurement apparatus | |
| CN101726366B (en) | Wavefront measurement method and device based on multiple-pinhole plate | |
| JP7231946B2 (en) | SURFACE PROFILE MEASURING DEVICE AND SURFACE PROFILE MEASURING METHOD | |
| CN113091896B (en) | Method and light path for dynamically measuring complete information of any light field based on polarization grating | |
| CN113418469B (en) | Spectrum confocal scanning common-path digital holographic measurement system and measurement method | |
| US6535276B2 (en) | Method for measuring the velocity of particles in a fluid medium in motion | |
| CN110989314A (en) | Continuous terahertz wave self-reference digital holographic imaging method based on Fresnel double-sided mirror | |
| CN205538736U (en) | Optical element surface defect detecting device of transmission dual wavelength synthetic aperture holography | |
| CN205643181U (en) | Optical element surface defect detecting device of reflection dual wavelength synthetic aperture holography | |
| Fu et al. | Interferometric dynamic measurement: techniques based on high-speed imaging or a single photodetector | |
| CN201149522Y (en) | Apparatus of multiple times focus for measuring ultrasonic suspending field | |
| CN103411687B (en) | System and the method for spatial coherence is measured based on triangular digital holography colorful | |
| CN201149521Y (en) | Apparatus with upside-down mounting telescope for measuring ultrasonic suspending field | |
| CN201145612Y (en) | Ultrasonic suspending field measurement apparatus | |
| KR20170023363A (en) | System and method for measuring high height by digital holography microscope | |
| CN108088368A (en) | Reflective off-axis digital holography apparatus and method based on light splitting pupil | |
| CN104280139A (en) | Dynamic phase measuring device and method | |
| CN201188029Y (en) | Apparatus for measuring ultrasound suspending field of multiplication light path | |
| CN201181238Y (en) | Ultrasound suspending field measurement apparatus | |
| CN205538737U (en) | High depth of field surface defect detecting device of optical element of reflection -type dual wavelength holography | |
| CN205538708U (en) | High depth of field surface defect detecting device of optical element of transmission type dual wavelength holography | |
| CN107024173B (en) | Use the total optical path point diffraction simultaneous phase-shifting interference testing device of pinhole difiration plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20111221 |