CN109870750A - A kind of bionics human eyes autofocus optical system - Google Patents
A kind of bionics human eyes autofocus optical system Download PDFInfo
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- CN109870750A CN109870750A CN201910205191.8A CN201910205191A CN109870750A CN 109870750 A CN109870750 A CN 109870750A CN 201910205191 A CN201910205191 A CN 201910205191A CN 109870750 A CN109870750 A CN 109870750A
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Abstract
A kind of bionics human eyes autofocus optical system, which is characterized in that including a fix-focus lens group camera lens, the front of the fix-focus lens group camera lens is coaxially equipped with a liquid zoom lens, and the rear of fix-focus lens group camera lens is equipped with photodetection face；The liquid zoom lens include the elastic film of variable curvature, and optical liquid is filled in elastic film, and the liquid zoom lens are connected with the zooming control device of control liquid disengaging.
Description
Technical field
This patent is related to a kind of method of designing optical system for realizing bionics human eyes auto-focusing, belongs to Optical System Design
Field
Technical background
Traditional bionical vision system is mostly handled using video camera target image, and this camera lens are generally adopted
It with tight shot, can not focus in real time, the observation that can not be amplified and reduce to target object, zoom lens are then
Such demand may be implemented.Zoom lens can be divided into traditional zoom camera lens and liquid from building form and working principle
Zoom lens.Zoom lens is largely by relative displacement between mechanical gear transmission change optical mirror slip or by soft at present
Part processing mode realizes that zoom, this zoom system, pancreatic system have the disadvantages such as structure is complicated, easy to wear, the service life is low, is difficult to continue direction
Miniaturization, dexterityization development.
Compared with traditional zoom system, low cost, low complex degree, be easy to be miniaturized, fastness is good, can quickly adjust optics
The design of the new zoom system of parameter is more attractive.This new zoom system can be based on certain adjustable optics
The active optical element of parameter, for example it is capable of the lens of autonomous zoom.Liquid zoom lens are then by simulating human lens
Zoom function changes refractive index or the shape of camera lens using certain control method to adjust focal length, realizes zoom function, is a kind of
Completely new zoom mode.The various features such as the zoom fast response time of liquid lens, low in energy consumption, noiseless are totally different from tradition
The adjustability of eyeglass, lens parameter provides a completely new freedom degree for optical design process, can make existing many zooms
System is significantly simplified.It is logical to can be applied to mobile phone, camera, camera shooting, microscope, medical field, optical test equipment, light
The fields such as letter and optical information processing, bionical vision.
Summary of the invention
This patent discloses a kind of method of designing optical system, for realizing the auto-focusing in bionical vision system.
This patent combines liquid lens and lens subassembly, on the basis of not needing machinery adjustment structure, realizes bionical vision system
Fast and accurately auto-focusing, and blur-free imaging.
The purpose of this patent is achieved through the following technical solutions.
A kind of bionics human eyes autofocus optical system, which is characterized in that including a fix-focus lens group camera lens, the fixed-focus
The front of lens of lens group is coaxially equipped with a liquid zoom lens, and the rear of fix-focus lens group camera lens is equipped with photodetection face；
The liquid zoom lens include the elastic film of variable curvature, and optical liquid is filled in elastic film, and the liquid becomes
Zoom lens are connected with the zooming control device of control liquid disengaging；
Being located at liquid zoom lens and the focal length of fix-focus lens group camera lens entirety when focusing is completed is f, object point system of distance
The distance of object focus F is x, and the distance of picture point system of distance rear focus F ' is x '；In focusing, x and x ' is datum, is adopted
Whole focal length f when focusing is completed can be calculated with following formula:
X'=f2/x
Focal length further according to fix-focus lens group camera lens is it can be learnt that the liquid zoom lens focal length focused when completing, zoom control
Device processed control liquid disengaging makes liquid zoom lens reach the focal length to complete to focus.
Further to improve, the zooming control device is driven by electric current, the focal power and zoom control of liquid zoom lens
The size of device electric current processed is directly proportional.
Optical imaging system designed by this patent is fine to the convergence effect of light, and the overall length of system is 52mm,
Final system visual field is 24 °.For system when field angle is 0 °, 10 ° and 24 °, corresponding disc of confusion radius is respectively 9.444 μ
M, 6.401 μm and 10.569 μm, the Dispersive spot radius of each visual field is respectively less than 11 μm, in system tolerances.The contrast of camera lens
It is very good in low-frequency range, and the low-down rate of decay is also able to maintain in high band.When spatial resolution about 48lp/mm, respectively
The MTF of visual field is all larger than 0.2.Real-time Focusing and blur-free imaging can be carried out well.
Detailed description of the invention
Fig. 1 liquid lens focusing schematic diagram
Fig. 2 liquid lens dynamic response time
Fig. 3 focal power and driving current relationship
The bionical vision optical system parameter schematic diagram calculation of Fig. 4
Fig. 5 bionics human eyes imaging system optical model parameter
Imaging optical system model of the Fig. 6 based on liquid lens
Corresponding blur circle when Fig. 7 difference field angle
The MTF curve of Fig. 8 imaging system
Fig. 9 actual test system structure chart
Figure 10 different object distances go out target imaging and corresponding MTF curve
Figure 11 different object distances focusing imaging effect
Specific embodiment
A kind of bionics human eyes autofocus optical system, by sequence from left to right by liquid zoom lens, fix-focus lens
Group and photodetection face are constituted.
The liquid zoom lens are that system is focused core element, are Curvature varying lens, it is main realize different operating away from
From target focusing.Liquid lens generally uses liquid filling mode, and liquid is limited in chamber using optical clear elastic film
In body, pellicular front deformation, power of lens are controlled by the pressure of liquid(focal length is reciprocal) is by liquid surface song
Both rate and fluid-air refringence determines.
In formula, f is the focal length of lens, and r is the radius of curvature of lens surface, and n is the refractive index of liquid.Deformable elastic film
For limiting optical liquid and generating required face shape under fluid chamber and extraneous pressure difference.When optical liquid is injected into liquid
A normal pressure will be generated when body cavity, elastic film is under pressure difference effect for outwardly convex, forms convex lens；On the contrary, working as
When optical liquid is extracted from fluid chamber, negative pressure will be generated and form concavees lens, by the pressure in the disengaging control chamber of liquid,
To realize the adjusting of focal length, as shown in Figure 1.
The dynamic response time and focal power and driving current relationship such as Fig. 2 and Fig. 3 of liquid lens indicate.
The fix-focus lens group is imaging len, is located at liquid lens rear, it is main realize different operating apart from when to mesh
Target blur-free imaging.
The major optical parameter schematic diagram calculation of bionics human eyes autofocus optical system is as shown in Figure 4.In order to simulate people
The physiological structure of eye, in liquid lens rear end, a series of optical elements are added in design, are formed imaging optical system, are enabled liquid lens
The focal length of back-end optical element combination (referred to as combining) is f2', from liquid lens rear focus to the distance of combination object focus
For s, for starting point F1', it calculates and arrives F2, it is positive from left to right.
System in combination focal length is calculated:
The object focus F of system entirety may further be obtained apart from liquid lens object focus F1Distance xFAfter and
Hold optical system rear focus F2' apart from the distance x for combining rear focus F 'F' be respectively as follows:
If the distance of object point system of distance object focus F is x, it is positive from left to right from F for origin to object point, picture point distance
The distance of system rear focus F ' is x ', is positive from left to right from F ' for origin to object point.When the numerical value of known x, can calculate
Obtain picpointed coordinate, i.e. image planes position x ':
X'=f2/x (4)
After determining system focal length and image planes position, according to the essential characteristic of opthalmic optics' system, one group of bionical vision is obtained
The optical model parameter of optical imaging system is as shown in Figure 5.
Optical model designed by the present invention is by a liquid zoom lens, a six chip tight shots and a light
Electric test surface composition, it is specific as shown in Figure 6.It is as shown in Figure 7 that blur circle is corresponded under different field angles.The imaging system is to light
Convergence effect is fine, and the overall length of system is 52mm, and final system visual field is 24 °.System field angle be 0 °, 10 ° and
At 24 °, corresponding disc of confusion radius is respectively 9.444 μm, 6.401 μm and 10.569 μm, and the Dispersive spot radius of each visual field is small
In 11 μm, in system tolerances.The MTF curve of the imaging system as shown in figure 8, camera lens contrast low-frequency range very
It is good, and the low-down rate of decay is also able to maintain in high band.When spatial resolution about 48lp/mm, the MTF of each visual field is big
In 0.2.
This patent is according to the experimental system built that designs a model as shown in figure 9, to the bionical visual light based on liquid lens
The actual imaging effect for learning imaging system is verified.It adjusts the distance and is imaged for the target of 320mm and 500mm, and utilize sword
Side method measures the MTF curve of system, as shown in Figure 10.When spatial resolution is about 40lp/mm, global MTF is all larger than 0.2.It is right
The actual object focusing imaging effect of different distance is as shown in figure 11.Designed imaging system can carry out Real-time Focusing well
And blur-free imaging.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (2)
1. a kind of bionics human eyes autofocus optical system, which is characterized in that including a fix-focus lens group camera lens, the fixed-focus is saturating
The front of microscope group camera lens is coaxially equipped with a liquid zoom lens, and the rear of fix-focus lens group camera lens is equipped with photodetection face；Institute
The liquid zoom lens stated include the elastic film of variable curvature, and optical liquid, the focus liquid are filled in elastic film
Camera lens is connected with the zooming control device of control liquid disengaging；
Being located at liquid zoom lens and the focal length of fix-focus lens group camera lens entirety when focusing is completed is f, object point system of distance object space
The distance of focus F is x, and the distance of picture point system of distance rear focus F ' is x '；In focusing, x and x ' is datum, using such as
Lower formula can calculate whole focal length f when focusing is completed:
X'=f2/x
Focal length further according to fix-focus lens group camera lens is it can be learnt that the liquid zoom lens focal length focused when completing, Zoom control dress
Set control liquid disengaging make liquid zoom lens reach the focal length complete focus.
2. a kind of bionics human eyes autofocus optical system as described in claim 1, which is characterized in that the Zoom control dress
It sets and is driven by electric current, the focal power of liquid zoom lens is directly proportional to the size of zooming control device electric current.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638039A (en) * | 2020-04-20 | 2020-09-08 | 中国科学技术大学智慧城市研究院(芜湖) | Laser speckle measurement system based on human visual characteristics |
| US11125979B2 (en) | 2019-08-14 | 2021-09-21 | Largan Precision Co., Ltd. | Optical photographing lens assembly comprising a component of variable refractive powers, image capturing unit and electronic device |
| US11366294B2 (en) | 2019-07-17 | 2022-06-21 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing unit and electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1172703A (en) * | 1997-08-29 | 1999-03-16 | Canon Inc | Projection zoom lens and projection device using the same |
| JP2005099116A (en) * | 2003-09-22 | 2005-04-14 | Seiko Epson Corp | Projection optical system, method of manufacturing projection optical system, and projector equipped with the projection optical system |
| CN101019129A (en) * | 2004-05-19 | 2007-08-15 | 讯宝科技公司 | Optical adjustment of working range and beam spot size in electro-optical readers |
| CN101661156A (en) * | 2008-08-26 | 2010-03-03 | 中国科学院西安光学精密机械研究所 | Method for realizing zoom optical system without moving lens group and optical system |
| CN102483505A (en) * | 2009-07-16 | 2012-05-30 | 迈思肯系统公司 | Optical assemblies for adjusting working distance and field of view in an imaging system |
| CN106249325A (en) * | 2016-10-14 | 2016-12-21 | 北京信息科技大学 | A kind of bionical quick focus adjustment method of vision based on liquid lens |
-
2019
- 2019-03-18 CN CN201910205191.8A patent/CN109870750A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1172703A (en) * | 1997-08-29 | 1999-03-16 | Canon Inc | Projection zoom lens and projection device using the same |
| JP2005099116A (en) * | 2003-09-22 | 2005-04-14 | Seiko Epson Corp | Projection optical system, method of manufacturing projection optical system, and projector equipped with the projection optical system |
| CN101019129A (en) * | 2004-05-19 | 2007-08-15 | 讯宝科技公司 | Optical adjustment of working range and beam spot size in electro-optical readers |
| CN101661156A (en) * | 2008-08-26 | 2010-03-03 | 中国科学院西安光学精密机械研究所 | Method for realizing zoom optical system without moving lens group and optical system |
| CN102483505A (en) * | 2009-07-16 | 2012-05-30 | 迈思肯系统公司 | Optical assemblies for adjusting working distance and field of view in an imaging system |
| CN106249325A (en) * | 2016-10-14 | 2016-12-21 | 北京信息科技大学 | A kind of bionical quick focus adjustment method of vision based on liquid lens |
Non-Patent Citations (1)
| Title |
|---|
| 韩军等: "《工程光学》", 29 February 2012 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11366294B2 (en) | 2019-07-17 | 2022-06-21 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing unit and electronic device |
| US11125979B2 (en) | 2019-08-14 | 2021-09-21 | Largan Precision Co., Ltd. | Optical photographing lens assembly comprising a component of variable refractive powers, image capturing unit and electronic device |
| CN111638039A (en) * | 2020-04-20 | 2020-09-08 | 中国科学技术大学智慧城市研究院(芜湖) | Laser speckle measurement system based on human visual characteristics |
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Application publication date: 20190611 |