Smart glass' micro-iris for smartphone cameras


A small part of the camera is a low-power "smart glass" material inspired the next generation of camera smartphones created by a group of researchers in Germany in the hope.
The iris is a micro-electro-chemical equivalent of bulky mechanical blades that normally found in cameras and has a very low power consumption, making it ideal integrated in a wide range of consumer camera components devices.
The device and the first results of the implementation were in a study published today, presents 19 June, in IOP Publishing Journal of optics.
In the human eye, control the iris of the pupil diameter, and then the amount of light on the retina. The purpose of an iris or aperture in a room is exactly the same; The amount of light, which controls the camera sensors, which affects the overall goal of the image.
Traditionally, the cameras have a content blade assembly, the mechanical movement of resize superposition of the holes - or aperture - penetrates through the light. However, with the growing popularity of small, compact and light consumer to integrate with cameras, it was almost impossible to miniaturize these mechanical sizesTeams. ADVERTISING Researchers at the University of Kaiserslautern, suggested an alternative method using an electrochromic material. This material, which is often referred to as "smart glass" transformed from a transparent material in a non-transparent material, when a low voltage is applied thereto.
In their study, the researchers have developed a micro aperture using two glass substrates sandwich, and each named with a thin layer of PEDOT electrochromic material, a transparent electrode underlying.
The microshutter was 55 m thick, and can be switched to an opaque state at a current of 20 uA at a voltage of 1.5 V.
The microshutters a memory effect and a continuous flow not required to maintain the opaque state, so that the energy consumpti
on is still very small.(BD IT TALK) In addition to examining the intensity of the light passing through the micro-iris, and the amount of time it takes to switch between different states, the researchers also examined the depth of the micro-iris discussion was able to communicate in terms of conventional iris base sheet.
The lead author of the research German Tobias said: "Currently there is no solution available technology that meets all the requirements of the openings of the integrated in smartphones membrane. "Many of the proposed mechanisms require moving a strong absorption material to block the path of light. Electrochromic materials, as used in this study, remain fixed while changing its absorption, so that n is not responsible for action is required. This allows much smaller envelopes to the corresponding equipment and therefore enables the integration of networks of small
cameras.(BD IT TALK) "Now we will explore the potential of the optimized electrochromic materials, with particular emphasis on the improvement of the optical contrast and in particular to control the depth of field - this is the crucial parameter that determines the material successful business models of the next generation of smartphones."
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