Download PDF by Hongwen Ren: Introduction to Adaptive Lenses
By Hongwen Ren
Presents readers with the fundamental technology, expertise, and functions for all types of adaptive lens
An adaptive lens is a lens whose form has been replaced to another focal size via an exterior stimulus akin to strain, electrical box, magnetic box, or temperature. Introduction to Adaptive Lenses is the 1st booklet ever to handle all the primary operation rules, gadget features, and strength purposes of varied forms of adaptive lenses.
This accomplished e-book covers simple fabric houses, gadget buildings and function, snapshot processing and zooming, optical communications, and biomedical imaging. Readers will locate homework difficulties and recommendations integrated on the finish of every chapter?and in accordance with the defined equipment constructions, they'll have the data to manufacture adaptive lenses for functional functions or boost new adaptive units or techniques for complicated investigation.
Introduction to Adaptive Lenses contains chapters on:
Elastomeric membrane lenses
Liquid crystal lenses
This is a crucial reference for optical engineers, learn scientists, graduate scholars, and undergraduate seniors.
Chapter 1 Optical Lens (pages 1–22):
Chapter 2 Elastomeric Membrane Lens (pages 23–79):
Chapter three Electrowetting Lens (pages 80–106):
Chapter four Dielectrophoretic Lens (pages 107–158):
Chapter five different Adaptive Liquid Lenses (pages 159–188):
Chapter 6 Liquid Crystal Lens (pages 189–269):
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Provides readers with the fundamental technological know-how, expertise, and functions for all types of adaptive lensAn adaptive lens is a lens whose form has been replaced to another focal size by way of an exterior stimulus comparable to strain, electrical box, magnetic box, or temperature. creation to Adaptive Lenses is the 1st publication ever to deal with all the basic operation rules, gadget features, and power purposes of varied different types of adaptive lenses.
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Extra resources for Introduction to Adaptive Lenses
2. 33, and the distance from lens to retina is si = 24 mm. Estimate the “accommodation” of the eye when observing object located from inﬁnity to 25 cm. 3. In a human eye, the distance between the lens and the retina (called image distance) always keeps constant when the focal length of the lens and the distance from the object to the lens change. If a compound lens is used to mimic the human eye’s: variable focal length without changing the image distance, at least how many lenses are required in the lens system?
The substrate is a plano-concave lens. It could be a ﬂat substrate, depending on the requirement. When the shaft of the syringe squeezes the reservoir, the liquid in the reservoir ﬂows to the chamber through the tube. Because the volume of the liquid is incompressible, the elastic membrane is deformed in order to get a new force balance. Therefore, the focal length of the lens cell changes accordingly. By pumping liquid in or out of the lens chamber, the pressure increases or decreases correspondingly.
Because the volume of the liquid is incompressible, the elastic membrane is deformed in order to get a new force balance. Therefore, the focal length of the lens cell changes accordingly. By pumping liquid in or out of the lens chamber, the pressure increases or decreases correspondingly. Experimental results show that the focal length of the lens cell is dependent on the pressure of the liquid on the inner surface of the elastic membrane or the volume change of the liquid in the lens chamber. To measure the pressure of the liquid, a pressure gauge is connected to the lens cell.
Introduction to Adaptive Lenses by Hongwen Ren