The purpose of this study is to find the shape requirement of image sensors when catching the image to obtain a much
clear image than the flat image sensor. The results are applied to an o-ring driven liquid filled lens. It was found that the
image distortion of the liquid filled lens is inevitable. Therefore, it is necessary to design an curved image sensor which
can compensate the image distortion to solve this problem. The shape of the image sensor can be predicted by computer
simulation. The required shape of the image sensor can be obtained by deforming the PDMS (Polydimethylsiloxane)
membrane. The deformation of PDMS membrane of lens and the image sensor film can be obtain by using ANSYS®
software at variable internal pressure in the liquid filled lens. The experimental module is composed of a barrel,
transparent liquid (De-ionized water), PDMS lens membrane, rigid ring of lens curvature control, adjustable accessories
of lens curvature orientation, the image sensors which are constructed on PDMS film, rigid ring of sensor film curvature
control, and adaptable accessories of sensor film variable curvature adjustment. The ring of sensor film and accessories
are utilized for variable sensor film's curvature control. On the basis of lens curvature's modulation, the image sensor
film tuning process makes the image sensors on the optimal plane.
The purpose of this study is to analyze the optical properties of a liquid lens and design a magnetism-driven mechanism
for that lens. The lens is composed of a base plate, a glass covered liquid reservoir, a flexible membrane (which is
opposite to the glass side of the liquid reservoir), a disk with an o-ring, a spring, three permanent magnets, and three
solenoids. The permanent magnets are fixed on the disk, which is used to control the displacement of the o-ring. The o-ring
is on the top of the membrane and is designed to move the o-ring. When the solenoid is operated, the o-ring
squeezes the membrane, the curvature of the membrane is changed and the focus can be varied according to the
magnitude of curvature change. The aberration of the lens can be obtained through analysis by substituting the
membrane profile into ZEMAX software. The effect of different ring diameter and thickness to the spherical aberration
is analyzed. Finally, a detail magnetism-driven mechanism is designed and discussed.
The purpose of this study is to present a design concept of a variable focus gradient index liquid lens. The concept of the
design is utilized a method which involve powder in liquid and the powder is driven by electrical magnetic force. This
lens is composed of a barrel, liquid, powder in liquid and electrical magnetic-driven control device. The electrical-magnetic
control device is used to control the powder distribution in the liquid; the controlled powder distribution makes
the lens becomes a gradient optical index lens. When the electrical magnetism-driven control device operates, the lens
optical index decreases from centric to rim in radial direction gradually. The focused position can be varied when the
electrical magnetism-driven controlled device operates in different conditions. Finally, a prototype is set up and
experiment is conducted. Application and analysis of the design concept is also discussed.
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