CN1063561A - Rotating wedge (prism) multiple holography and application thereof - Google Patents
Rotating wedge (prism) multiple holography and application thereof Download PDFInfo
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- CN1063561A CN1063561A CN 91106914 CN91106914A CN1063561A CN 1063561 A CN1063561 A CN 1063561A CN 91106914 CN91106914 CN 91106914 CN 91106914 A CN91106914 A CN 91106914A CN 1063561 A CN1063561 A CN 1063561A
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- reference light
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Abstract
A kind of rotating wedge (prism) multiple holography and application thereof belong to the optical holography field.It is to be divided into two-beam by the light that laser instrument sends through beam splitter, wherein a branch ofly constitutes the thing light wave through the beam expanding lens direct irradiation in body surface; Another bundle constitutes the plane reference light wave through catoptron and collimating optical system, again through its direction of propagation of Spin Control of rotating wedge or prism, thereby it is more to obtain port number, reference light wave can be selected arbitrarily, and light path arrangement is simple, and is convenient, optical element is few, and thing light and reference light beam intensity ratio are constant, when making multiple recording, and characteristics such as the time shutter is easy to control.
Description
Rotating wedge (prism) multiple holography and application thereof belong to the optical holography field.
So far relatively the multiple holographic method of success be people such as V.G.KnlkarNi in 1981 propose utilize light by the diffraction light that orthogonal grating produces, obtain 10 road reference lighies, taken reasonable multiplex hologram.But still there is following shortcoming in this method:
1. thing light and the reference light that constitutes holographic recording all used 4 lens combinations (four focal length systems), and gets the diffraction light of different stage as reference light by the light Column of a two-dimensional adjustable.Therefore, this light path arrangement is complicated, and required optical element is many, and the cost height uses inconvenience.
2. limited what diffraction light that produces by grating of light can only be, the direction of propagation of diffraction lights at different levels also is certain.Therefore, the diffraction light that produces with grating is as reference light, and its port number must be limited, and, can not select bad adaptability arbitrarily.
3. when making holographic recording, requiring the ratio of thing light and reference light light intensity is definite value.But the light intensity of the diffraction light that is produced by grating is that the increase with the order of diffraction weakens, and when the diffraction light light time for referencial use with the different diffraction level, the ratio of thing light and reference light light intensity becomes thereupon.Thereby when making multiple recording, the time shutter is just wayward, so its practical application difficulty just.
Task of the present invention is to develop that a kind of to obtain port number many, and light path system is simple, and optical element is few, and is easy to adjust, is easy to realize the multiple holographic method of wide application.
The multiple holographic method that realizes task of the present invention is to adopt rotating wedge (prism) multiple holography.Its technical solution is, the light by laser instrument sends is divided into two bundle light through beam splitter, and wherein a branch of light is after beam expanding lens amplifies, and direct irradiation is in subject, the light formation thing light wave of being penetrated by body surface anti-(overflowing); Be characterized in another Shu Guang of branching away by beam splitter,, control its direction of propagation via rotating wedge (or prism) through the plane reference light wave that catoptron and collimating optical system constitute.Promptly, come control plane reference light direction of wave travel by the anglec of rotation of wedge (or prism), the anglec of rotation difference of wedge, plane reference light direction of wave travel becomes thereupon.
Because the plane reference light wave of this technical scheme is only realized its spatial modulation through a wedge, so light path arrangement is simple, optical element is few; By the wedge rotation, realized that again the space is adjustable continuously, so port number is more, reference light wave can be selected arbitrarily, adaptability is wider; Again because of reference light all by same wedge, thing light and reference light beam intensity ratio are constant, when making multiple recording, the time shutter is control just easily.
Accompanying drawing 1. is the basic light path principle figure of the multiple holography of rotating wedge of the present invention (prism).
Accompanying drawing 2. is the fundamental diagram of rotating wedge of the present invention.
Accompanying drawing 3. multidate informations are stored basic light path principle figure.
The holographic basic light path principle figure of accompanying drawing 4. multiple image faces.
The holographic basic light path principle figure of accompanying drawing 5. multiple fourier transforms.
In the accompanying drawing 1, the light that is sent by laser instrument (1) is divided into two-beam through beam splitter (2), and wherein a branch of light shines in subject (4) after beam expanding lens (3) amplifies, and constitutes the thing light wave by object (4) surface reflection, shines on the dry plate (9); Another Shu Guangjing catoptron (5) reflexes to catoptron (6), and the light that is reflected by catoptron (6) forms parallel reference light wave through collimating optical system (7) again, injects on the dry plate (9) through rotating wedge (8) again.It is to utilize the thing light wave of different objects (or different conditions of same object) to rotate and the different reference lighies of acquisition with rotating wedge, makes multiple recording, gets multiplex hologram.Its basic functional principle can be illustrated by accompanying drawing 2.α angle in the accompanying drawing 2 be former incident parallel rays (1) behind rotating wedge (RW), make light (2) or (3) depart from the deflection angle of former incident parallel rays (1) (dotted line) direction.θ angle among the figure is stray light (2) or (3) and the angle of z axle, and the φ angle among the figure is that stray light (2) or (3) are at (x, y) angle of projection on the plane and x axle.By accompanying drawing 2 as can be known, after θ angle and φ angle are determined, parallel reference light direction of wave travel has also just been determined, therefore the rotation by rotating wedge (RW) realizes the modulation in its space, be actually the rotation by wedge, realization θ controls parallel reference light direction of wave travel with the modulation at φ angle in the angle.If the angle of former incident directional light and z axle is β, after adding rotating wedge, make light (2) depart from former incident ray (1) direction α, incident parallel rays (2) that at this moment departs from and z axle angle theta
Min=β-α, when rotating wedge (RW) Rotate 180 °, incident parallel rays (3) after departing from and z axle angle theta
Min=β+α.When so rotating wedge rotates between 0-360 °, the desirable scope in θ angle (β+α) and (between the β-α), θ angle modulation that Here it is; When rotating wedge (RW) rotated, the φ angle was continuous adjustable at 0-360 °.By above-mentioned principle of work as can be known, because parallel reference light is only realized its space (being θ, φ angle) modulation through a rotating wedge, so light path arrangement is simpler, convenient than adopting optical-mechanical system, optical element is few; And by the rotation of wedge, realized the θ angle (β+α) and (between the β-α) and φ angle adjustable continuously between 0-360 °, thus it is more to obtain port number, reference light can be selected arbitrarily, the characteristics that adaptability is wider; Also because reference light all by same wedge, then thing light and reference light beam intensity ratio are invariable, thereby when making multiple recording, just easy control of time shutter; Moreover be exactly, the multiplex hologram of shooting, its again phenomenon not only can observe simultaneously, and be positioned on the oval circumferential edge, oval major semi-axis is z
0Sin(β+α), minor semi-axis is Z
0Sin(β-α), elliptical center is at (x
0, y
0) locate.(x in the formula
0, y
0, z
0) be the centre coordinate of object.
Also applicable multiple phase hologram, information stores, the multiple holography of double-exposure, the basic light path such as the multiple holography of time average done of the basic light path of accompanying drawing 1.As accompanying drawing 3, accompanying drawing 4 and accompanying drawing 5 is exactly the present invention's three application examples wherein.
Illustration 3 is stored basic light path principle figure for multidate information.The light that is sent by laser instrument (He-Ne) is divided into the two-beam line through beam splitter (BS), and wherein Ray Of Light is through collimating optical system (L
1) shine object (S) after, through Fourier transform lens (L
2) and rotating wedge (RW) or prism (RP) frequency spectrum that obtains thing inject lithographic plate (H); Another bundle light of being told by beam splitter (BS) is through catoptron (M
1) and (M
2) form reference light wave after, inject dry plate (H) through rotating wedge (RW) or prism (RP) again.
Accompanying drawing 4 is the holographic basic light path principle figures of multiple image face, and the light that is sent by laser instrument (He-Ne) is divided into two bundles through beam splitter (BS) equally, and is a branch of through reflection (M
1) after the reflection, according in object (S), the thing light that goes out by object (S) surface reflection through imaging mirror (L) imaging on dry plate (H); Another bundle is through catoptron (M
2) and the direction of propagation of the plane reference light that forms of collimating optical system (L) penetrate on dry plate (H) by wedge (RW) control.
Accompanying drawing 5 is the holographic basic light path principle figures of multiple fourier transform.The coherent plane wave that it is sent by laser instrument (He-Ne), wherein a part is shone in object (S), and its thing optical spectrum is through Fourier transform mirror (L
2) the thing optical spectrum is fallen on the frequency plane, promptly dry plate (H) is gone up ((H) just in time is arranged on the frequency plane because of dry plate); Another part line focus lens (L
1) by with the conplane aperture of object, through fourier lense (L
2) getting the plane reference light, the direction of propagation of thing frequency spectrum and plane reference light all is subjected to rotating wedge (RW) control.
Claims (1)
- A kind of rotating wedge (prism) multiple holography and application thereof, be the light that sends by laser instrument, be divided into two-beam through beam splitter, wherein a branch ofly form the thing light wave in body surface through the beam expanding lens direct irradiation, another bundle is learned system formation plane reference light wave through catoptron and collimation, it is characterized in that controlling its direction of propagation by the rotation of rotating wedge or prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106914 CN1063561A (en) | 1991-01-21 | 1991-01-21 | Rotating wedge (prism) multiple holography and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106914 CN1063561A (en) | 1991-01-21 | 1991-01-21 | Rotating wedge (prism) multiple holography and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1063561A true CN1063561A (en) | 1992-08-12 |
Family
ID=4908291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106914 Pending CN1063561A (en) | 1991-01-21 | 1991-01-21 | Rotating wedge (prism) multiple holography and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063561A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373269C (en) * | 2003-11-07 | 2008-03-05 | 中国科学院上海光学精密机械研究所 | Femtosecond pulse holographic device |
| CN101163942B (en) * | 2005-05-10 | 2012-02-29 | 天宝导航有限公司 | Method and apparatus for optical correction of a laser beam |
| CN111307440A (en) * | 2020-03-13 | 2020-06-19 | 西安建筑科技大学 | Qualitative diagnosis method for power frequency fault of rotary machine |
-
1991
- 1991-01-21 CN CN 91106914 patent/CN1063561A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373269C (en) * | 2003-11-07 | 2008-03-05 | 中国科学院上海光学精密机械研究所 | Femtosecond pulse holographic device |
| CN101163942B (en) * | 2005-05-10 | 2012-02-29 | 天宝导航有限公司 | Method and apparatus for optical correction of a laser beam |
| CN111307440A (en) * | 2020-03-13 | 2020-06-19 | 西安建筑科技大学 | Qualitative diagnosis method for power frequency fault of rotary machine |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |