A Jones matrix approach is used to study a magnetooptic read-back system which uses a wave plate for maximizing the signal. The effects and interactions of Kerr rotation, Kerr ellipticity, birefringence in the substrate and in the optical system, and misalignment of the optical components are considered. Several criteria are developed for maximizing the signal and minimizing the noise.
A spatially modulated, direct‐lit back light unit (BLU), also known as mini‐LED BLU, is becoming a preferred solution for a high dynamic range (HDR) LCD based display system. With localized dimming, an LCD based display can offer contrast characteristics that are similar to an emissive display system such as OLED. A major challenge facing mini‐LED BLU film stack design, is transforming the grid emission pattern of a mini‐LED array into a uniform luminance area light source. This is particularly true for mobile devices where BLU thickness, or optical distance (OD), must be minimized. We have demonstrated Micro‐Lens Array (MLA) solutions that efficiently eliminate hot spots induced by a mini‐LED array within extremely short OD. Films with various optical structures were analyzed and used to create a high‐performance optical layer within the mini‐LED BLU film stack. To further enhance performance, we propose and demonstrate the concept of a spatially modified MLA optical film with a "lattice" pattern matching the mini‐LED array. Lattice optical films were designed and fabricated at Bright View Technologies and substantial performance enhancements were experimentally demonstrated.
Magneto -optic media are an attractive method of achieving high density erasable information storage.Several parameters are important in the dynamic characterization of these media, including C/N ratios, sensitivity, erasability, magneto -optic rotations, and reflectivity.The purpose of this paper is to report these and other media characteristics for a newly developed, high signal to noise ratio magneto -optic media.
This paper describes the status of magneto -optic product development and the media scaleup activities. Examples are cited from the 3M magneto -optic disc production facility to show that M/0 has emerged as the dominant erasable technology.We present data indicating a complete resolution of issues such as substrates and product lifetime that were associated with M/0 technology in the past. In the end we reflect on what lies ahead for M/0 technology and the developments needed for second generation products.
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