# 电子工程代写|三维成像代写Three-Dimensional Imaging代考|CVPR2022

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|The Solid Phase LC Lenticular Lens Method

In the solid phase method developed by Ocuity Ltd., the state of the LC lenticular lens does not change and the different polarization of light is chosen so that the light feels or does not feel the existence of the lens. The structure of the solid phase method and its principle in 2-D and 3-D modes are shown in Fig. $4.4[5,6]$.

The solid phase structure is composed of a display panel, LC lenses, a refractive medium, an electrical polarization switch, and a polarizer. In the 2-D mode, the vertical polarization component of the backlight is selected. This makes the light through the lens feel the same refractive index as that of the outside medium. Hence, no refraction occurs. In this situation, the polarization of the output light is not matched with the axis of the polarizer. The polarization switching is needed to change the polarization. On the contrary, in the 3-D mode, the horizontal polarized light component is used. It feels the higher refractive index of the LC lens than that of the outside refractive medium. In this situation, there is refraction at the boundary of the LC lens. The images are displayed by the principle of a lenticular 3-D display.

With the above principles, the solid phase LC lenticular method has the following advantages/disadvantages.

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|The LC Active Lenticular Lens Method

The LC active lenticular lens, developed by Philips, is an active device which can function as a lens or not [7]. The principle uses the optical property of the LC of having different refractive indexes depending on its state. The structure and principle of the LC active lenticular lens method is shown in Fig. 4.5. In Fig. 4.5, each lenticular lens is filled with LC. The indium tin oxide (ITO) electrodes are positioned around it to provide the control voltage. Outside of the lens, there is a replica which has the same refractive index as that of the $\mathrm{LC}$ when the bias voltage is applied. In the 3 – D mode, no voltage is applied to the electrode and there is a difference between the refractive indexes of the $\mathrm{LC}$ and the replica. In this case, polarization of the light is used that feels the extraordinary refractive index of the $\mathrm{LC}$ in the lens. As a result, the 3 – $\mathrm{D}$ image can be formed through the $\mathrm{LC}$ active lenticular lens as shown in Fig. 4.5(a). In the 2-D mode, with appropriate voltage, the difference of refractive indexes between the LC and replica vanishes and the LC active lenticular lens cannot perform as a lens. Therefore, the observer can see the images on the display panel without any distortion. The LC active lenticular lens array method has a similar principle as the solid phase LC lenticular lens, and also has the same advantages and disadvantages.

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|The LC Active Lenticular Lens Method

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