کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7132611 1461719 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel backlight unit for volume-holographic optical elements-based time-multiplexed three-dimensional displays
ترجمه فارسی عنوان
واحد نور پس زمینه جدید برای صفحه نمایش سه بعدی چند منظوره مبتنی بر عناصر نوری هولوگرافی
کلمات کلیدی
صفحه نمایش سه بعدی، اپتیک هندسی طراحی نوری هندسی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی
In volume-holographic optical elements (VHOEs)-based time-sequential three-dimensional (3-D) displays, two reference beams generated from a backlight unit (BLU) illuminate VHOEs, and from which object beams satisfying the Brag condition are then diffracted. These beams form a pair of alternating light fields for stereo 3-D view. Since this system operates based on diffraction optics, its performance highly depends on the degrees of collimation and uniformity of the reference beams. Thus, a new BLU system to generate uniformly-collimated reference beams for the VHOEs-based 3-D display is proposed by combined use of a light-guide-plate (LGP) grooved with an array of angle-variant flat-top prisms, and two LED light sources attached with reflection-type beam collimators. Simulation results with LightTools 7.1 show that the average full-width at half maximum (FWHM), backshift ratio and intensity uniformity of the LGP output beam of the proposed system have been significantly reduced down to 2.8° and 0.4%, and increased up to 90.9%, respectively, from the values of 51.8°, 26.5% and 24.5% of the conventional system. They represent 18.5-, 66.3- and 3.7-fold improvements of those values in the proposed system, respectively. These successful results confirm the feasibility of the proposed system in the practical VHOEs-based 3-D display.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 74, November 2015, Pages 28-39
نویسندگان
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