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WO2018212677A1 - Lentille liquide à focale variable - Google Patents

Lentille liquide à focale variable Download PDF

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Publication number
WO2018212677A1
WO2018212677A1 PCT/RU2018/000236 RU2018000236W WO2018212677A1 WO 2018212677 A1 WO2018212677 A1 WO 2018212677A1 RU 2018000236 W RU2018000236 W RU 2018000236W WO 2018212677 A1 WO2018212677 A1 WO 2018212677A1
Authority
WO
WIPO (PCT)
Prior art keywords
focal length
liquid
droplet
laser beam
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.)
Ceased
Application number
PCT/RU2018/000236
Other languages
English (en)
Russian (ru)
Inventor
Natalia Anatolevna IVANOVA
Aleksandr Iurevich MALIUK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal State Autonomous Educational Institution Of Higher Education "tyumen State University"
Original Assignee
Federal State Autonomous Educational Institution Of Higher Education "tyumen State University"
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal State Autonomous Educational Institution Of Higher Education "tyumen State University" filed Critical Federal State Autonomous Educational Institution Of Higher Education "tyumen State University"
Publication of WO2018212677A1 publication Critical patent/WO2018212677A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • the alleged invention relates to the field of optofluidics, adaptive optics and optoelectronics and can be used to create an adaptive optical system that changes the sign of the focal length and realigns the optical characteristics without using a system of moving lenses.
  • Liquid optical elements are a good alternative to mechanical systems, because they can perform an unlimited number of cycles without any wear, have a high focusing and reorientation speed due to fluidity properties, as well as the ability to update the optical medium by pumping liquid
  • a known liquid lens [1] is an interface (meniscus) between water and oil, while the water is in a micro reservoir with a transparent bottom and side walls of a thermosensitive hydrogel with the addition of gold nanoparticles that are highly absorbing IR radiation, and the oil layer is on top.
  • a change in the volume of the hydrogel walls caused by IR irradiation leads to a change in the magnitude and sign of the meniscus curvature, and, consequently, the focal length.
  • a varifocal lens was proposed in the form of a meniscus of two immiscible liquids (the lower layer is water, the upper layer is 1-bromododecane) filling a cylindrical cell (6 mm in diameter) with transparent upper and lower walls, and an aperture protrusion of 3 mm in diameter, in the area of the meniscus to hold it.
  • the adjustment of the focal length is carried out by changing the magnitude and sign of the meniscus curvature by manually moving the movable piston mounted in the lower part of the cuvette.
  • the disadvantages of this method include the crude, namely manual, mechanism for adjusting the focal length, which, given the presence of a denser upper liquid, can lead to the meniscus leaving the retention zone and, as a consequence, to overturning the two-layer system.
  • Known varifocal lens [3] which is a portion of a liquid (deionized water) filling a cylindrical cell with side walls of a piezoelectric and a bottom of a silicone membrane.
  • the free surface of the liquid maintains a convex shape at a resonant frequency of the voltage applied to the piezoelectric transducer, and the focal length varies with the magnitude of the control voltage.
  • the disadvantages of such a lens include the inability to change the sign of the focal length (the liquid surface works only as a collecting lens), and the limitation of its applicability as part of complex devices associated with the generation of spurious vibrations.
  • a varifocal liquid lens in the form of a sedentary drop of an electrically conductive liquid on a dielectric substrate coated with a thin layer of a dielectric was demonstrated in [4], and a network of control electrodes was mounted between the substrate and the dialectic.
  • the control of the focal length of such a lens is carried out by changing its curvature, in depending on the voltage applied to the electrodes.
  • Significant disadvantages of such a lens include: an extremely small range of focal length adjustment (about 20% of the initial value corresponding to zero voltage), the inability to change the sign of the focal length (a drop works only as a collecting lens), the need to use a wetting film of dielectric fluid to prevent edge hysteresis the wetting angle of the droplet during the adjustment of the focal length.
  • the use of electrically conductive liquids as the lens material a limitation is placed on the applicability of such a lens, and a complex electrode system requires the development of a control software package.
  • a varifocal liquid lens is known [5], the body of which is formed as a sedentary drop from a layer of a solution of a non-volatile positive tensoactive substance in a volatile solvent using the effect of concentration-capillary convection controlled by a light beam, and the focal length is adjusted by changing the beam power.
  • this lens has the following disadvantages: it is necessary to use a sealed cell to prevent solvent leakage, as well as to heat the lid of the cuvette to prevent condensation of vapors on it, leading to optical interference; restriction on the choice of a pair of working fluids, which are subject to the requirements of mutual solubility, a large difference in surface tension and saturated vapor pressure between the fluids. In addition, this drop only works as a collecting lens.
  • the technical result of this invention is a significant simplification of the control of the focal length and design of the liquid lens, expanding the range of the focal length in the modes of the collecting and scattering lenses, expanding the range of liquids used to form the body of the lens, and, in general, increase the reliability of the varifocal lens.
  • the technical result is achieved by using a droplet of a non-volatile liquid sitting on a transparent substrate with the addition of a dye laser absorbing the control beam, and the change in its focal length is due to deformation of the free surface of the drop caused by centrifugal thermocapillary forces induced by the thermal action of the control laser beam [6-8], while the magnitude and sign of the focal length are determined by the power of the control beam.
  • FIG. 1 The principle of operation of the varifocal fluid lens is illustrated in FIG. 1.
  • 1 is a sedentary drop of liquid
  • 2 is a transparent substrate
  • 3 is a laser beam.
  • benzyl alcohol is slightly colored with a crystalline violet dye.
  • the focal length F of the drop increases from +18 to +56 mm (3 times).
  • the proposed varifocal liquid lens characterized by simplicity and reliability, has the following advantages: a wide range of adjustment of the focal length and the ability to change the sign of the focal length; any non-volatile liquid can be used as a working fluid, which forms a sessile drop on the substrate with a non-zero wetting angle; the manufacture of a sealed cell or cell with a complex structure of the inner surface of the walls is not required; focal length control is carried out contactlessly using a laser beam.
  • any light beam can be used to deform the surface, for example, focused radiation of a photodiode, mercury or halogen lamp, it is enough that the radiation is absorbed either in the droplet volume by adding a dye or by choosing the radiation wavelength absorbed by the liquid itself or by the substrate material.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

L'invention se rapporte au domaine des optiques fluides, de l'optique adaptative et de l'optronique et peut être utilisée pour créer des systèmes optiques adaptatifs permettant de changer le signe de la distance focale et de réajuster des caractéristiques optiques sans utiliser de systèmes à lentilles mobiles. Cette lentille liquide à focale variable est caractérisée par la simplicité de sa structure et le procédé de commande de la distance focale, ainsi que par un grand spectre d'ajustement de la distance focae et la possibilité de modifier le signe de la distance focale. L'invention consiste essentiellement à appliquer sur une surface transparente une goutte de liquide non volatil en ajoutant un colorant absorbant un faisceau laser, formant ainsi un angle de mouillage marginal différent de zéro, et la modification de la longueur focale se produirt suite à la déformation de sa surface libre sous l'action de forces centrifuges thermo-capillaires générées par l'action thermique du faisceau laser, la valeur et le signe de la distance focale étant déterminés par la puissance du faisceau. Les avantages de cette lentille liquide à focale variable sont que l'on utilise, en qualité de liquide, un quelconque liquide non volatil, qu'il n'y n'est pas nécessaire de farbiquer une cellule étanche ou une cellule de structure complexe; l'ajustement de la distance focale se fait sans contact à l'aide du faisceau laser ou du rayonnement focalisé d'une quelconque autre source de lumière, comme une photodiode, des lampes au mercure ou halogènes, et il suffit simplement que le rayonnement soit absorbé soit dans le volume de la goutte, soit par le matériau du substrat.
PCT/RU2018/000236 2017-05-16 2018-04-16 Lentille liquide à focale variable Ceased WO2018212677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017117108A RU2652522C1 (ru) 2017-05-16 2017-05-16 Варифокальная жидкая линза
RU2017117108 2017-05-16

Publications (1)

Publication Number Publication Date
WO2018212677A1 true WO2018212677A1 (fr) 2018-11-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2018/000236 Ceased WO2018212677A1 (fr) 2017-05-16 2018-04-16 Lentille liquide à focale variable

Country Status (2)

Country Link
RU (1) RU2652522C1 (fr)
WO (1) WO2018212677A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116719108A (zh) * 2023-06-08 2023-09-08 西安电子科技大学 一种基于超疏油-亲油表面的无极变焦太赫兹液体透镜的制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2744033C1 (ru) * 2020-06-01 2021-03-02 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет геосистем и технологий" КВЧ варифокальная линза

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2149434C1 (ru) * 1998-04-14 2000-05-20 Тюменский государственный университет Адаптивное оптическое устройство на основе жидкой линзы
US6545816B1 (en) * 2001-10-19 2003-04-08 Lucent Technologies Inc. Photo-tunable liquid microlens
US20030227100A1 (en) * 2002-03-12 2003-12-11 Chandross Edwin A. Solidifiable tunable liquid microlens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080117521A1 (en) * 2006-11-17 2008-05-22 Lucent Technologies Inc. Liquid lenses with cycloalkanes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2149434C1 (ru) * 1998-04-14 2000-05-20 Тюменский государственный университет Адаптивное оптическое устройство на основе жидкой линзы
US6545816B1 (en) * 2001-10-19 2003-04-08 Lucent Technologies Inc. Photo-tunable liquid microlens
US20030227100A1 (en) * 2002-03-12 2003-12-11 Chandross Edwin A. Solidifiable tunable liquid microlens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
B. A. BEZUGLYJ, N. A. IWANOWA, A. `. ZUEWA: "THERMOCAPILLARY DEFORMATION OF A THIN LIQUID LIQUID CAUSED BY A LASER BEAM", SUITABLE MECHANICS AND TECHNICAL PHYSICS., vol. 42, no. 3, 2001, pages 130 - 134, XP055612174 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116719108A (zh) * 2023-06-08 2023-09-08 西安电子科技大学 一种基于超疏油-亲油表面的无极变焦太赫兹液体透镜的制备方法

Also Published As

Publication number Publication date
RU2652522C1 (ru) 2018-04-26

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