CN105204313B - A kind of optical focal distance setting system and Zooming method based on programmable orthogonal contiguity cylindrical lens - Google Patents
A kind of optical focal distance setting system and Zooming method based on programmable orthogonal contiguity cylindrical lens Download PDFInfo
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- CN105204313B CN105204313B CN201510712268.2A CN201510712268A CN105204313B CN 105204313 B CN105204313 B CN 105204313B CN 201510712268 A CN201510712268 A CN 201510712268A CN 105204313 B CN105204313 B CN 105204313B
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Abstract
The present invention proposes a kind of optical focal distance setting system and Zooming method based on programmable orthogonal contiguity cylindrical lens.This system includes spatial light modulator, computer and imaging sensor；The imaging sensor is arranged on the right side of spatial light modulator；Its spatial light modulator is connected by transmission line with computer, is controlled by computer and is carried out zoom in the orthogonal contiguity cylindrical lens to spatial light modulator of loading programmable.This invention simplifies the structures of zoom system, pancreatic system, reduce system bulk, and cost is relatively low, have certain application prospect.
Description
Technical field
The invention belongs to optical zoom fields, and particularly, the present invention relates to one kind based on programmable orthogonal contiguity cylindrical lens
Optical focal distance setting system and Zooming method.
Background technology
With the development of science and technology and improvement of living standard, requirement of the people to optical focal distance setting system are higher and higher.
Traditional mechanical zoom system is composed of several groups of fixed lens units of focal length, by mechanically changing lens unit
Between distance change the focal length of system, and it is very strict to the movement requirement of lens unit, lead to traditional mechanical change
The problems such as burnt system structure is complicated, bulky, cost of manufacture is high and the scope of application is narrow.Due to mechanical zoom system by
To the limitation of many many factors, people urgently want to seek a kind of mode of active zoom to replace it.
Cylindrical lens are widely used in laser beam flying, laser semiconductor light in recent years as most common a kind of lens
The fields such as field collimation, wide-screen projection, holographic optical interconnection device, eye optical instrument.As shown in Fig. 1, by orthogonal contiguity column
The shortcomings that optical system that the optical system that lens are constituted overcomes traditional globe lens composition can not achieve anisotropy operation, from
And enhance the flexibility of light path setting.But the optical system that this orthogonal contiguity cylindrical lens are constituted is mechanical zoom system,
Practicability is still very restricted, so that carrying out digital zoom using spatial light modulator has obtained extensive pass
Note.Spatial light modulator is a kind of equipment of electronic programmable, and the modulation to light wave amplitude, phase, frequency etc. may be implemented.It is logical
It crosses and spatial light modulator is added in optical system, can mitigate system weight with reduction system volume, reduce cost, therefore
It is with a wide range of applications.
Invention content
To solve problems of the prior art, the present invention proposes a kind of light based on programmable orthogonal contiguity cylindrical lens
Learn zoom system, pancreatic system and Zooming method, the orthogonal contiguity cylindrical lens of loading programmable substitute mechanical zoom in spatial light modulator
Lens group, profit, which is computerizedd control, is loaded into the focal length of the programmable cylindrical lens in spatial light modulator to realize zoom so that
Zoom system, pancreatic system has the advantages that zoom rate is fast, is easily achieved, maintenance cost is low etc..
The technical solution adopted in the present invention：
A kind of optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens as shown in Fig. 2, including spatial light modulator,
Computer and imaging sensor；The imaging sensor is arranged on the right side of spatial light modulator；Its spatial light modulator
It is connected with computer by transmission line, is controlled in the orthogonal contiguity cylindrical lens to spatial light modulator of loading programmable by computer
Carry out zoom.
Based on the optical zoom method of programmable orthogonal contiguity cylindrical lens, include the following steps：
（1）Build the optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens；
（2）Incident light is radiated in spatial light modulator；
（3）One is loaded in spatial light modulator and may be programmed orthogonal contiguity cylindrical lens, may be programmed orthogonal contiguity cylindrical lens
It is made of two cylindrical lens, first cylindrical lens is vertically placed, and referred to as vertical cylindrical lens, second cylindrical lens is laterally disposed, is claimed
For lateral cylindrical lens.According to the unidirectional phase-modulation property of cylindrical lens, set the focal lengths of vertical cylindrical lens as, it is calculated perpendicular
It is to the phase-modulation of cylindrical lens, the focal length of lateral cylindrical lens is, the phase of lateral cylindrical lens is calculated
It is modulated to, whereinIt is the wavelength of incident light,xWithyFor cartesian coordinate.It then may be programmed orthogonal contiguity cylindrical lens
Associated phase-modulation be, the phase-modulation of programmable orthogonal contiguity cylindrical lens is compiled into phase
Position hologram simultaneously loads in spatial light modulator；
（4）Change the hologram for being loaded into the programmable orthogonal contiguity cylindrical lens in spatial light modulator by computer,
The focal length for changing programmable orthogonal contiguity cylindrical lens, to realize digital zoom functions；
（5）Modulated object light is irradiated on imaging sensor, is acquired to the image of acquisition.
Preferably, spatial light modulator is transmission-type type spatial light modulator.
Preferably, imaging sensor is ccd image sensor.
Preferably, step（3）In cartesian coordinatex、yMeasured since programmable cylindrical lens center.
Preferably, step（3）Middle phaseModulus when calculatingOperation.
Preferably, step（3）In may be programmed the focal lengths of vertical cylindrical lens and lateral cylindrical lens in orthogonal contiguity cylindrical lensWith, whenWhen, it may be programmed the focal length of orthogonal contiguity cylindrical lens；WhenWhen, it may be programmed just
Hand over contiguity cylindrical lens individually to light into line directionxWithyThe phase-modulation in direction is realized and is operated to the anisotropy of object light.
Description of the drawings
Attached drawing 1 is the traditional optical zoom system, pancreatic system schematic diagram that orthogonal contiguity cylindrical lens are constituted.
Attached drawing 2 is the structural representation of the optical focal distance setting system proposed by the present invention based on programmable orthogonal contiguity cylindrical lens
Figure.
Attached drawing 3 is that the focal length of the present invention is 50cmProgrammable orthogonal contiguity cylindrical lens phase hologram.
Attached drawing 4 is that the focal length of the present invention is 35cmVertical cylindrical lens and focal length be 50cmTransverse post lens combination at
The phase hologram of programmable orthogonal contiguity cylindrical lens.
Attached drawing 5 is that the focal length of the present invention is 50cmVertical cylindrical lens and focal length be 35cmTransverse post lens combination at
The phase hologram of programmable orthogonal contiguity cylindrical lens.
Shown by reference numeral in above-mentioned attached drawing is：
1 spatial light modulator, 2 computers, 3 imaging sensors
It should be appreciated that above-mentioned attached drawing is only schematical, it is not drawn to draw.
Specific implementation mode
The following detailed description of a kind of optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens proposed by the present invention and
The embodiment of Zooming method, is further described the present invention.It is necessarily pointed out that following embodiment is served only for
The present invention is described further, and should not be understood as limiting the scope of the invention, field technology skilled person according to
Foregoing invention content makes some nonessential modifications and adaptations to the present invention, still falls within protection scope of the present invention.
The present invention is generated the vertical cylindrical lens of different focal length by computer according to the phase-modulation principle of spatial light modulator
And may be programmed the phase hologram of orthogonal contiguity cylindrical lens made of transverse post lens combination, phase hologram is loaded in space
On optical modulator, incident light is modulated by spatial light modulator, realizes digital zoom functions.Programmable orthogonal contiguity cylindrical lens tool
There is phase-modulation, the phase-modulation that accompanies is, whereinFor the focal length of vertical cylindrical lens,For transverse direction
The focal length of cylindrical lens,It is the wavelength of incident light,xWithyFor cartesian coordinate.
By in spatial light modulator load different focal length vertical cylindrical lens and transverse post lens combination made of can
The phase hologram for programming orthogonal contiguity cylindrical lens realizes zoom function, the phase hologram that is shown in spatial light modulator
It can be byIt is calculated, whereinxWithyFor cartesian coordinate, from programmable cylindrical lens
The heart starts to measure,Indicate modulusOperation.Modulo operation is to make the programmable diffraction of cylindrical lens in theory
Efficiency can reach100%, the phase of each pixel can be in spatial light modulatorVariation, that is, realize in range
Digital zoom functions.
Below in conjunction with the drawings and specific embodiments, invention is further described in detail.
As shown in Fig. 2, a kind of optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens, including space light modulation
Device, computer and imaging sensor；The imaging sensor is arranged on the right side of spatial light modulator；Wherein space light modulation
Device is connected by transmission line with computer, and the orthogonal contiguity cylindrical lens of loading programmable are controlled to spatial light modulator by computer
Upper carry out zoom.
Claims (2)
1. a kind of optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens, which is characterized in that the system includes spatial light
Modulator, computer and imaging sensor；The imaging sensor is arranged on the right side of spatial light modulator；Wherein spatial light
Modulator is connected by transmission line with computer, and the orthogonal contiguity cylindrical lens of loading programmable are controlled to spatial light tune by computer
Zoom is carried out on device processed；Incident light is radiated in spatial light modulator, and one is loaded on spatial light modulator and may be programmed just
Contiguity cylindrical lens are handed over, orthogonal contiguity cylindrical lens is may be programmed and is made of two cylindrical lens, first cylindrical lens is vertically placed, referred to as perpendicular
To cylindrical lens, second cylindrical lens is laterally disposed, referred to as lateral cylindrical lens, according to the unidirectional phase-modulation property of cylindrical lens, if
The focal length of fixed vertical cylindrical lens is f1, the phase-modulation that vertical cylindrical lens are calculated isLateral cylindrical lens
Focal length is f2, the phase-modulation that lateral cylindrical lens are calculated isWherein λ is the wavelength of incident light, and x and y are
Cartesian coordinate, the then associated phase-modulation that may be programmed orthogonal contiguity cylindrical lens areIt will
The phase-modulation of programmable orthogonal contiguity cylindrical lens is compiled into phase hologram and loads in spatial light modulator, passes through calculating
Machine changes hologram, changes the focal length of programmable orthogonal contiguity cylindrical lens, to realize digital zoom functions, modulated object light
It is irradiated on imaging sensor, the image of acquisition is acquired.
2. a kind of optical focal distance setting system based on programmable orthogonal contiguity cylindrical lens according to claim 1, feature exist
In the spatial light modulator is transmission-type type spatial light modulator, and the imaging sensor is ccd image sensor.
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| CN201510712268.2A CN105204313B (en) | 2015-08-16 | 2015-10-28 | A kind of optical focal distance setting system and Zooming method based on programmable orthogonal contiguity cylindrical lens |
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| CN201510497100 | 2015-08-16 | ||
| CN201510712268.2A CN105204313B (en) | 2015-08-16 | 2015-10-28 | A kind of optical focal distance setting system and Zooming method based on programmable orthogonal contiguity cylindrical lens |
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| CN105204313B true CN105204313B (en) | 2018-07-17 |
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| CN102354068A (en) * | 2011-10-24 | 2012-02-15 | 苏州科技学院 | Method for realizing varifocal lens based on liquid crystal space optical modulator |
| CN104698802A (en) * | 2015-03-24 | 2015-06-10 | 四川大学 | Large-size calculation holographic representation method |
| CN104777738A (en) * | 2015-04-17 | 2015-07-15 | 四川大学 | Holographic zoom system for eliminating bad light |
| CN104898364A (en) * | 2011-04-28 | 2015-09-09 | 大日本印刷株式会社 | Projection apparatus and projection control apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62209992A (en) * | 1986-03-11 | 1987-09-16 | Canon Inc | Display device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898364A (en) * | 2011-04-28 | 2015-09-09 | 大日本印刷株式会社 | Projection apparatus and projection control apparatus |
| CN102354068A (en) * | 2011-10-24 | 2012-02-15 | 苏州科技学院 | Method for realizing varifocal lens based on liquid crystal space optical modulator |
| CN104698802A (en) * | 2015-03-24 | 2015-06-10 | 四川大学 | Large-size calculation holographic representation method |
| CN104777738A (en) * | 2015-04-17 | 2015-07-15 | 四川大学 | Holographic zoom system for eliminating bad light |
Non-Patent Citations (1)
| Title |
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| 柱透镜成像规律的研究;张恒;《河北工业大学硕士学位论文》;20081231;第1-19页 * |
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