For the liquid lens based on electro-wetting, the optical aperture influences the profile of the liquid drop due to the capillary effect, therefore, it will has an effect on the aberration of liquid lens. The spherical aberration caused by the different optical apertures with the different slope has been investigated by ray tracing. The analysis results have shown that the absolute value of positive and negative spherical aberration at the aperture of 4mm goes down by 2μm when the optical aperture goes up from 4.2mm to 5mm and that gradient of positive spherical aberration decrease with increasing optical aperture, that gradient of negative spherical aberration increase with increasing optical aperture. The critical turning voltage when spherical aberration changes from positive to negative is independent of optical aperture.

Low spherical aberration of the focal length tunable liquid lens

The pulsed laser has gradually become the standard method of studying the single-event effects of micro-nano devices, and it is a powerful supplement to heavy ion experiments on single-event effects. In particular, with the continuous improvement of the technological range and operating frequency of electronic devices, the femtosecond pulse laser has the potential for broad applications and practical value in the single-event effects testing and radiation hardness evaluations of devices. The single-event effects of single-photon and two-photon absorption were studied with a laser of 1064 nm and 1260 nm, and the influences of SPA (single-photon absorption) and TPA (two-photon absorption) on the single-event transient voltage under different pulse laser energies were analyzed. The test results of the TPA SEE (single-event effect) were basically consistent with those of the SPA SEE, and the trend of the change in the transient voltage pulse was consistent. These results lay a foundation for the application of the femtosecond pulse laser in the performance evaluation and screening of space electronic devices and the radiation hardness evaluation of satellite electronic systems.

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Experimental Comparison of the Single-Event Effects of Single-Photon and Two-Photon Absorption under a Pulsed Laser

The optical aperture of the liquid lens has a effect on the optical power, but until now, there is no research report on this effect .In this paper, based on Laplace function, the effect of the optical aperture on the optical parameters of the liquid lens has been analyzed, it is found that the optical aperture plays an important role on the optical power dynamic tuning range.

Chenguang Zhang

Papers

Low spherical aberration of the focal length tunable liquid lens

Experimental Comparison of the Single-Event Effects of Single-Photon and Two-Photon Absorption under a Pulsed Laser

The analysis on the optical power of focal length tunable liquid lens