A Liquid Crystal Microlens with Hole-Patterned Electrodes on Both Substrates

Abstract

Electrically controlled lens properties (liquid crystal microlens) can be obtained by utilizing molecular orientation effects in an axially symmetric nonuniform electric field. Excellent lens properties can be obtained using a symmetric electrode structure with hole-patterned electrodes on both substrates. Several kinds of optical properties have been investigated and characteristic phenomena of the liquid crystal microlens are discussed in terms of a molecular orientation model.

Liquid Crystal Focusing Device

“…Это позволяет реализовать адаптивные линзы различных конфигураций, управлять фокусирующими свойствами которых можно за счет изменения амплитуды и частоты напряжения. Возможность использования для управления параметрами ЖК-линзы частоты управляющего напряжения, а не только ампли-туды, принципиально отличает рассматривае-мый подход от подхода, описанного в [3,4] Multi-pixel spatial light modulators provide unique capabilities for generation of dynamically controlled light fields with various structures, and therefore find wide application for schemes of optical tweezers to form different optical traps and their arrays, for problems of control of focal distance of image systems and others. For practical application in biomedicine, astronomy and industry it is relevant to form complicated light fields using inexpensive and technologically simple controlled devices.…”

“…It allows implementing the adaptive lenses with different configurations, which focusing properties can be controlled by means of variation of voltage amplitude and frequency. Capability to use the frequency of control voltage and not only amplitude for the control of LC lens parameters gives principle difference to the considered approach in comparison with the approach described in the papers [3,4] where the profile of phase delay is formed by means of boundary field. Besides, the aperture of implemented lenses, which are described in the papers [3,4], is optical devices and systems restricted by several hundreds of micrometers, and due to use of control electrode these restrictions were removed.…”

“…Capability to use the frequency of control voltage and not only amplitude for the control of LC lens parameters gives principle difference to the considered approach in comparison with the approach described in the papers [3,4] where the profile of phase delay is formed by means of boundary field. Besides, the aperture of implemented lenses, which are described in the papers [3,4], is optical devices and systems restricted by several hundreds of micrometers, and due to use of control electrode these restrictions were removed. On the basis of considered approach a number of modal LC devices was developed: spherical and cylindrical adaptive lenses with the size of aperture of more than 1 mm and control voltages of not more than 10 V, wavefront correctors with adjustable response function, adaptive lenses with optically-controlled focal distance [2,[5][6][7][8].…”

“…LC of BL037 brand produced by Merck with the thickness of 10μm was used in our experiments; aperture of the device was краевого поля. Кроме того, апертура реализован-ных линз, описанных в [3,4] ограничена несколь-кими сотнями микрометров, а за счет использо-вания управляющего электрода эти ограничения были сняты. На основе рассматриваемого подхода был разработан ряд модальных ЖК устройств: сферические и цилиндрические адаптивные линзы с размером апертуры более 1 мм с управля-ющими напряжениями не более 10 В, корректоры волнового фронта с перестраиваемой функцией отклика, адаптивные линзы с оптически управ-ляемым фокусным расстоянием [2,[5][6][7][8].…”

“…Это позволяет реализовать адаптивные линзы различных конфигураций, управлять фокусирующими свойствами которых можно за счет изменения амплитуды и частоты напряжения. Возможность использования для управления параметрами ЖК-линзы частоты управляющего напряжения, а не только ампли-туды, принципиально отличает рассматривае-мый подход от подхода, описанного в [3,4], где профиль фазовой задержки формируется за счет …”