CN103336364A - Double prism light displacement amplifier - Google Patents
Double prism light displacement amplifier Download PDFInfo
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- CN103336364A CN103336364A CN2013102380123A CN201310238012A CN103336364A CN 103336364 A CN103336364 A CN 103336364A CN 2013102380123 A CN2013102380123 A CN 2013102380123A CN 201310238012 A CN201310238012 A CN 201310238012A CN 103336364 A CN103336364 A CN 103336364A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 52
- 210000001624 hip Anatomy 0.000 claims description 5
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- 239000005304 optical glass Substances 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 16
- 230000003321 amplification Effects 0.000 abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 7
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 6
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- 238000005286 illumination Methods 0.000 description 4
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Abstract
The invention relates to a double-prism optical displacement amplifier, which comprises a pentagonal prism and a displacement amplification prism; the incident light entering the pentagonal prism is emitted after passing through the pentagonal prism and forms first emergent light; the displacement magnifier is arranged on the emergent light path of the first emergent light; the first emergent light is emitted after passing through the displacement amplification prism to form second emergent light. The invention provides a double-prism optical displacement amplifier which can eliminate synchronous errors, simplify a movement mechanism and has high reliability.
Description
Technical field
The invention belongs to optical field, relate to a kind of optical displacement amplifier, relate in particular to a kind of biprism light displacement amplifier that is applied in the naval vessel bubble wake detection under water.
Background technology
Change in when the bubble wake flow is ship navigation because boundary layer, screw propeller stirs the field of turbulent flow that contains a large amount of bubbles that forms, microbubble wherein can be survived for a long time in water, characteristics such as the size of microbubble, volume density, movement velocity have reflected important informations such as the size, the speed of a ship or plane on naval vessel, so the detection of bubble wake flow has important Research Significance.Yet domestic relevant research at present only rests on research, the laboratory proofing stage of correlation theory mostly.The optical detection of wake flow under water is difficult: survey light and decay under water seriously, propagation distance is short; Scattered light is stronger in the water, has flooded the flashlight of bubble to be detected, the picture contrast extreme difference.Xian Inst. of Optics and Precision Mechanics, Chinese Academy of Sciences has developed the formal product that the domestic first cover is used for wake detection in 2010, can measure parameters such as the air bladder density of wake flow, bubble size, movement velocitys.
The principle of this equipment is: by the certain volume seawater being carried out the mode that fore-and-aft direction is cut into slices at a high speed and scanned, obtain the stereo-picture of bubble in this volume, can calculate total number of bubbles amount, volume density, bubble size according to scan image; By section scanning repeatedly at a high speed, the bubble position that contrasts twice scan image changes, and can calculate bubble velocity.In order to improve the scan image contrast, key is to reduce target area stray light in addition by rational lighting system.In the scheme scanning solid space left surface (or right flank), adopt the sheet laser illumination target bubble of very thin thickness, the face that has only the target place like this is bright, all is dark before and after the target, get rid of the scattering interference, be conducive to obtain the wake flow bubble of high-contrast.Cut into slices when scanning when scanning lens seesaws, with sheet laser motion together thereupon, expect that it can cooperate imaging lens to follow the synchronous portable lighting of section in high-speed motion section scanning process.
Yet because liquids and gases two media optical parametric difference, this equipment its lighting system when work has its unique need: equipment cabinets and seawater are isolated with waterproof glass, when section scans at a high speed, if scanning lens moves forward and backward a segment distance △ S in the cabinet air, refraction reason owing to water, section in the water has been moved 1.33 △ S(as shown in Figure 1), sheet laser also need could realize following illumination along with the mobile 1.33 △ S of section.That is to say that 1.33 times of ability that the movement velocity of sheet laser should be camera motion speed guarantee optimal illumination.Two kinds of speed change approach the most easily expecting are: 1. by camera motion mechanism, adopt mechanical gear box to promote the movement velocity of light source; 2. adopt two cover motions, control light source and camera lens respectively, by time control the two is synchronized with the movement.The difficulty that these two kinds of methods realize in the scanning process of back and forth cutting into slices at a high speed is all bigger, and the former wheel box has problems such as backhaul gap, noise be big, the latter owing to the load difference of the two, is difficult in the reciprocal process of acceleration and deceleration guarantee that the two is synchronously strict in to-and-fro movement.
Summary of the invention
In order to solve the above-mentioned technical matters that exists in the background technology, the invention provides and a kind ofly eliminate synchronous error, can simplify motion and the high biprism light displacement amplifier of reliability.
Technical solution of the present invention is: the invention provides a kind of biprism light displacement amplifier, its special character is: described biprism light displacement amplifier comprises pentagonal prism and displacement amplification prism; Be incident to the incident light of pentagonal prism through penetrating and form first emergent light behind the pentagonal prism; Described displacement magnifier is arranged on the emitting light path of first emergent light; Described first emergent light penetrates after prism is amplified in displacement and forms second emergent light.
The cross section that prism is amplified in above-mentioned displacement is trapezoidal; Described cross section is trapezoidal displacement and amplifies first plane of refraction and second plane of refraction that prism comprises trapezoidal end face, trapezoidal bottom surface and constitutes trapezoidal two waists respectively; Described trapezoidal end face and trapezoidal bottom surface are parallel to each other; Described trapezoidal bottom surface is interior reflective surface; Described first plane of refraction is arranged on the input path of first emergent light; Described second plane of refraction is arranged on the emitting light path of second emergent light.
Above-mentioned second emergent light is vertical with second plane of refraction.
It is the formed face of cylinder of the centre of gyration that above-mentioned displacement amplification prism is provided with a rib with trapezoidal end face of being convenient to install and fix.
Above-mentioned pentagonal prism comprises the plane of incidence, first reflecting surface, second reflecting surface and exit facet; Described incident light is successively through penetrating and form first emergent light behind the plane of incidence, first reflecting surface, second reflecting surface and the exit facet.
The angle of above-mentioned first emergent light and incident light is 90 degree.
It is that prism is amplified in the displacement of adopting the K9 optical glass material to make that prism is amplified in above-mentioned displacement.
Advantage of the present invention is:
The invention provides a kind of biprism light displacement amplifier of being formed by biprism, synchronous to-and-fro movement that the laser illuminator device only needs and scanning lens is fixed together, light beam is twice of pentagonal prism internal reflection, direction of light deflection 90 °, when incident light during along self working direction move left and right, the pentagonal prism emergent light also in the same way, equivalent moves.The present invention can realize that the illumination light strictness is carried out synchronous scanning with 1.33 times of velocity of shot in the water, has eliminated synchronous error, has simplified motion, and reliability improves, and has reduced the motion noise.
Description of drawings
Fig. 1 is that seawater is to imaging ray refraction synoptic diagram;
Fig. 2 is the work synoptic diagram of biprism light displacement amplifier provided by the present invention;
Fig. 3 is the structural representation of amplification prism of the present invention;
Wherein:
The 1-pentagonal prism; Prism is amplified in the 2-displacement; 21-first plane of refraction; 22-second plane of refraction; The trapezoidal bottom surface of 23-.
Embodiment
Referring to Fig. 2, the invention provides a kind of biprism light displacement amplifier, biprism light displacement amplifier comprises pentagonal prism 1 and displacement amplification prism 2; The incident light that is incident to pentagonal prism 1 penetrates and forms first emergent light through behind the pentagonal prism 1; The displacement magnifier is arranged on the emitting light path of first emergent light; First emergent light penetrates after prism 2 is amplified in displacement and forms second emergent light; The angle of first emergent light and incident light is 90 degree.
Referring to Fig. 2 and Fig. 3, the cross section that prism 2 is amplified in displacement is trapezoidal; The cross section is trapezoidal displacement and amplifies first plane of refraction 21 and second plane of refraction 22 that prism 2 comprises trapezoidal end face, trapezoidal bottom surface 23 and constitutes trapezoidal two waists respectively; Trapezoidal end face and trapezoidal bottom surface 23 are parallel to each other; Trapezoidal bottom surface 23 is interior reflective surface; First plane of refraction 21 is arranged on the input path of first emergent light; Second plane of refraction 22 is arranged on the emitting light path of second emergent light; Second emergent light is vertical with second plane of refraction 22;
It is the formed face of cylinder of the centre of gyration that displacement amplification prism 2 is provided with a rib with trapezoidal end face of being convenient to install and fix.
Referring to Fig. 2 and 3, the cross section that prism 2 is amplified in displacement is trapezoidal, and it has three workplaces, and trapezoidal two waists are plane of refraction, and trapezoidal bottom is interior reflective surface, and trapezoidal top is non-working surface.During work, oblique first plane of refraction 21 that is mapped to of light beam, refract light is after prism trapezoidal bottom surface 23 reflections, perpendicular to 22 outgoing of second plane of refraction.When incident light has horizontal shift △ S, amplify the refractive index n of magnification and prism material in first plane of refraction, the 21 smooth displacements of amplifying prism
Seawater, first plane of refraction 21 angle of light α relevant.The displacement magnification is with n
Seawater, α increase and increase. Trapezoidal bottom surface 23 and 22 pairs of light displacements of second plane of refraction do not exert an influence.Adopt the K9 optical glass material to make if amplify prism, its profile as shown in Figure 3.Trapezoidal trapezoidal bottom surface 23 is parallel with end face, is convenient to processing; The angle of the base of prism and two waists be respectively 54 ° 42 ' and 84 ° 48 '; Be that centre of gyration processing radius is the face of cylinder of R with rib of prism end face, make things convenient for prism to install and fix, alleviate prism weight.The size of prism can be decided on concrete needs according to shape shown in Figure 3.
If refractive index is other liquid of n when carrying out similar scanning survey, when prism is amplified in design, need adjust the pitch angle of first plane of refraction 21 according to liquid refractive index n, the displacement enlargement ratio of the plane of refraction 21 of winning is equaled and liquid refractive index.Adjust the vergence direction of trapezoidal bottom surface 23, guarantee that the emergent light that amplifies prism gets final product perpendicular to second plane of refraction 22.
Claims (7)
1. biprism light displacement amplifier is characterized in that: described biprism light displacement amplifier comprises that pentagonal prism and displacement amplify prism; Be incident to the incident light of pentagonal prism through penetrating and form first emergent light behind the pentagonal prism; Described displacement magnifier is arranged on the emitting light path of first emergent light; Described first emergent light penetrates after prism is amplified in displacement and forms second emergent light.
2. biprism light displacement amplifier according to claim 1 is characterized in that: the cross section that prism is amplified in described displacement is trapezoidal; First plane of refraction and second plane of refraction that prism comprises trapezoidal end face, trapezoidal bottom surface and constitutes trapezoidal two waists respectively amplified in described displacement; Described trapezoidal end face and trapezoidal bottom surface are parallel to each other; Described trapezoidal bottom surface is interior reflective surface; Described first plane of refraction is arranged on the input path of first emergent light; Described second plane of refraction is arranged on the emitting light path of second emergent light.
3. biprism light displacement amplifier according to claim 2, it is characterized in that: described second emergent light is vertical with second plane of refraction.
4. biprism light displacement amplifier according to claim 3 is characterized in that: prism is amplified in described displacement, and to be provided with a rib with trapezoidal end face of being convenient to install and fix be the formed face of cylinder of the centre of gyration.
5. according to claim 1 or 2 or 3 or 4 described biprism light displacement amplifiers, it is characterized in that: described pentagonal prism comprises the plane of incidence, first reflecting surface, second reflecting surface and exit facet; Described incident light is successively through penetrating and form first emergent light behind the plane of incidence, first reflecting surface, second reflecting surface and the exit facet.
6. biprism light displacement amplifier according to claim 5 is characterized in that: the angle of described first emergent light and incident light is 90 degree.
7. biprism light displacement amplifier according to claim 6 is characterized in that: it is that prism is amplified in the displacement of adopting the K9 optical glass material to make that prism is amplified in described displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102380123A CN103336364A (en) | 2013-06-14 | 2013-06-14 | Double prism light displacement amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102380123A CN103336364A (en) | 2013-06-14 | 2013-06-14 | Double prism light displacement amplifier |
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| CN103336364A true CN103336364A (en) | 2013-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873128A (en) * | 2018-09-05 | 2018-11-23 | 四川新易盛通信技术有限公司 | Prism, the application method of prism, prism group and optical assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090641A (en) * | 1992-11-12 | 1994-08-10 | 株式会社拓普康 | Apparatus for compensating tilt angle automatically |
| CN1309304A (en) * | 2000-01-21 | 2001-08-22 | 索尼公司 | Optical element and optical pick-up device |
| JP2001305319A (en) * | 2000-04-19 | 2001-10-31 | Sony Corp | Anamorphic prism, optical head and optical recording and reproducing device |
| CN203365790U (en) * | 2013-06-14 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | Double prism light displacement amplifier |
-
2013
- 2013-06-14 CN CN2013102380123A patent/CN103336364A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090641A (en) * | 1992-11-12 | 1994-08-10 | 株式会社拓普康 | Apparatus for compensating tilt angle automatically |
| CN1309304A (en) * | 2000-01-21 | 2001-08-22 | 索尼公司 | Optical element and optical pick-up device |
| JP2001305319A (en) * | 2000-04-19 | 2001-10-31 | Sony Corp | Anamorphic prism, optical head and optical recording and reproducing device |
| CN203365790U (en) * | 2013-06-14 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | Double prism light displacement amplifier |
Non-Patent Citations (2)
| Title |
|---|
| 于殿泓等: "五棱镜用于建立基准平面时的扫描误差补偿", 《工具技术》 * |
| 李腾龙等: "尾流气泡参数测量系统的光学设计", 《红外与激光工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873128A (en) * | 2018-09-05 | 2018-11-23 | 四川新易盛通信技术有限公司 | Prism, the application method of prism, prism group and optical assembly |
| CN108873128B (en) * | 2018-09-05 | 2024-02-23 | 四川新易盛通信技术有限公司 | Prism, method for using prism as light beam adjuster, prism set and light assembly |
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Application publication date: 20131002 |