In opticaldesign, the designer's experience is critical. Indeed, an experienced opticaldesigner will often choose a better starting point for optimization than an inexperienced one. Most of the time, lens design...
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ISBN:
(纸本)9781510654198;9781510654181
In opticaldesign, the designer's experience is critical. Indeed, an experienced opticaldesigner will often choose a better starting point for optimization than an inexperienced one. Most of the time, lens design software use a local optimization algorithm, which is why the starting point is so important to get an excellent optical system. We present here an alternative to the classical opticaldesign method and a solution to reduce the impact of the designer's experience. Our alternative couples the Simultaneous Multiple Surfaces (SMS) method, introduced by Benitez and Minano with optimization in Zemax OpticStudio. The SMS method is a direct construction method of optical systems without optical aberrations for as many field points as the system contains surfaces. This method can deal with both aspheric and freeform optical systems depending on the dimension of the method implemented. Our implementation of the SMS method can designoptical systems with three surfaces. We use the SMS method to define a freeform system with an F-number of 0.85. Then, we use this fast freeform system as a starting point to perform further optimization in Zemax OpticStudio. Finally, we achieve to design two diffraction-limited freeform systems, one over a square field of view of +/- 30 degrees and another over a rectangular field of view of +/- 33 degrees x +/- 26 degrees.
This paper presents the design and simulation of an AlGaAs-based vertical Cavity Surface Emitting Laser (vCSEL) with a curved bottom Distributed Bragg Reflector (DBR), operating at 830 nm. The curved mirror enhances m...
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To enhance the performance of the PMU, a voltage reference based on a voltage bandgap has been proposed. During the power-on process, the startup circuit is activated due to parasitic capacitance coupling. After the p...
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Interfacial solar steam generation(ISSG)system has attracted extensive attention as a sustainable desalination technology because of its cost efficiency and zero fossil-energy *** at optimizing the desalination proper...
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Interfacial solar steam generation(ISSG)system has attracted extensive attention as a sustainable desalination technology because of its cost efficiency and zero fossil-energy *** at optimizing the desalination properties,materials and system design have been the current research ***,many novel bio-derived/bio-inspired design strategies were proposed owing to their highly efficient structures inherited from nature,which were fine-tuned over eons of evolution,as well as their low cost and ease of *** this review,we are going to systematically report recent progress of various bio-derived/bio-inspired strategies in terms of opticaldesign,wetting,thermal management,and overall system design,presenting an overview of the current challenges of bio-inspired materials in ISSG system and other application *** article is intended to provide a comprehensive review of recent developments about bio-derived/bio-inspired materials in ISSG system and conclude with suggestions regarding further research directions for performance enhancement through design of bio-derived/bio-inspired materials.
Holographic display elements (HOEs) with a high diffraction efficiency and size enlargement have been developed since 2019. To achieve high brightness and low haze, unprecedented optical systems have been proposed wit...
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ISBN:
(纸本)9781510654198;9781510654181
Holographic display elements (HOEs) with a high diffraction efficiency and size enlargement have been developed since 2019. To achieve high brightness and low haze, unprecedented optical systems have been proposed with a uniform chief ray angle of 0 degrees in the x-section and 70 degrees in the y-section of the HOEs. A 360 degrees cylindrical holographic screen display (CHSD) was obtained by providing a large tilt to the surface shape near the optical axis. This was done using a first-order odd aspherical coefficient for the light flux from a refractive optical system (RO). A flat holographic screen display (FHSD) is a compact, high-performance display that uses three decentered and tilted freeform mirrors to route light flux from the RO in a ball-like form. Prototyping also proposes the possibility of an augmented reality system that takes advantage of the high transparency. The design for further miniaturization while maintaining optical performance was also discussed, in which the size of the first mirror was reduced by reducing the half-field angle of the RO to approximately 6 degrees. Furthermore, by increasing the negative power of the second mirror, the small size could be maintained The size of the last mirror was dependent on the screen size and could not be reduced. By laying down the posture of this mirror, we were able to halve the size reduction in the vertical direction. In this paper, lens designs for CHSDs and FHSDs are reported. The potential of this display is also discussed.
To reduce the area occupied by the low dropout regulator (LDO) in the whole chip system and to current consumption in standby state, this paper proposes a new structure using a diode-connected PMOS as a load resistor,...
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The integration of distributed power supply into the distribution network is an important trend in the development of the current new power system. In view of the problem that the system can not quickly and accurately...
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The proceedings contain 14 papers. The topics discussed include: ultrashort throw lenses with catadioptric relay suitable for flat and curved screens;light field displays for near eye vR and AR;wide angle lens with im...
ISBN:
(纸本)9781510637702
The proceedings contain 14 papers. The topics discussed include: ultrashort throw lenses with catadioptric relay suitable for flat and curved screens;light field displays for near eye vR and AR;wide angle lens with improved relative illumination characteristics;optimization of a mobile phone camera for as-built performance;inverse designed flat optics with multilevel diffractive lenses;opticaldesign of triple-mode seeker;comparison of passive athermalization results of LWIR opticaldesigns utilizing different infrared optical materials;and design of an anastigmatic three-mirror telescope using freeform surfaces.
The design and implementation of Underwater Wireless optical Communication (UWOC) provide important scientific problems. UWOC has the ability to transmit data at a high pace across long distances. This essay makes an ...
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The creation and implementation of a system that bridges visible light communication (vLC) with selected identifiers, envisioned as informational beacons, are outlined. This system is adept at controlling LED panels a...
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