Novel Optical Design of a Marine LED Lantern Using a Double Reflector Instead of a Conventional Fresnel Lens

2018 ◽  
Vol 68 (4) ◽  
pp. 472-476
Author(s):  
Jung Sik JOO ◽  
Deuk Saeng LEE ◽  
Hyo Jong PARK ◽  
Hyun Kyoung YANG*
Keyword(s):  
Optical Design ◽  
Fresnel Lens

scholarly journals Optical design of two-axes parabolic trough collector and two-section Fresnel lens for line-to-spot solar concentration

2015 ◽  
Vol 23 (11) ◽  
pp. A480 ◽  
Author(s):  
Carlos Ramírez ◽  
Noel León ◽  
Héctor García ◽  
Humberto Aguayo
Keyword(s):  
Optical Design ◽  
Fresnel Lens ◽  
Parabolic Trough ◽  
Parabolic Trough Collector

Optical Design of a Double-Side Fresnel Lens for Concentrator

2015 ◽  
Vol 35 (1) ◽  
pp. 0122008
Author(s):  
于春岩 Yu Chunyan ◽  
崔庆丰 Cui Qingfeng ◽  
朱浩 Zhu Hao ◽  
张博 Zhang Bo
Keyword(s):  
Optical Design ◽  
Fresnel Lens

Optical design of the Fresnel lens for LED-driven flashlight

2016 ◽  
Vol 55 (4) ◽  
pp. 712 ◽  
Author(s):  
Yi-Cheng Chen ◽  
Shih-Chih Nian ◽  
Ming-Shyan Huang
Keyword(s):  
Optical Design ◽  
Fresnel Lens

scholarly journals Quasi-Optical Design of a Millimeter Wave Imaging System

2020 ◽  
Author(s):  
Faeze Jadidi ◽  
Abdollah Eslamimajd ◽  
Alireza Erfaniyan ◽  
Seyed Hossein Mohseni Armaki
Keyword(s):  
Millimeter Wave ◽  
Imaging System ◽  
Optical Design ◽  
Horn Antenna ◽  
Fresnel Lens ◽  
Wave Radiation ◽  
Central Frequency ◽  
Millimeter Wave Imaging ◽  
W Band ◽  
Wave Imaging

Abstract In this paper, we report a complete design and simulation of a quasi-optical millimeter wave imaging system using ZEMAX and FEKO software, respectively. A Fresnel lens and a horn antenna are combined in this this design. Compared to spherical and aspherical lenses, a Fresnel lens can be fabricated much easier at millimeter wavelengths. For focusing millimeter wave radiation, a Fresnel lens can be used to reduce the thickness of the focusing element and to lighten its weight from 25 Kg to 4.5 Kg. A horn antenna with a Gaussian profile and corrugated walls is designed for feeding this system at a central frequency of 94 GHz. The symmetrical radiation pattern of the designed corrugated Gaussian horn in E and H orthogonal planes, its wide bandwidth and low side lobe levels make it a good candidate for feeding a W-band millimeter wave imaging system. The designed quasi-optical imaging system is light-weighted, has high resolution and can be used in detecting hidden objects within a distance of 5 meters with a 30 mm resolution in W-band at a central frequency of 94 GHz.

scholarly journals Quasi-optical Design of a Millimeter Wave Imaging System 

2020 ◽  
Author(s):  
Faeze Jadidi ◽  
Abdollah Eslamimajd ◽  
Alireza Erfaniyan ◽  
Seyed Hossein Mohseni Armaki
Keyword(s):  
Millimeter Wave ◽  
Imaging System ◽  
Optical Design ◽  
Horn Antenna ◽  
Fresnel Lens ◽  
Wave Radiation ◽  
Central Frequency ◽  
Millimeter Wave Imaging ◽  
W Band ◽  
Wave Imaging

Abstract In this paper, we report complete design and simulation of a quasi-optical millimeter wave imaging system with Fresnel lens and horn Antenna using ZEMAX and FEKO softwares, respectively. It is much easier to make a Fresnel lens at millimeter wavelengths compared to spherical and aspherical lenses. The use of Fresnel lens to focus millimeter wave radiation greatly reduces the thickness and also the weight of the focusing element from 25 Kg to 4.5 Kg. A horn antenna with Gaussian profile and corrugated walls at the central frequency of 94 GHz for feeding this system is designed. The symmetry of the designed corrugated Gaussian horn radiation pattern in E and H orthogonal planes, its wide bandwidth as well as its low side lobe levels make it a good candidate for feeding a W band millimeter-wave imaging system. The designed quasi-optical imaging system has low weight with high resolution and can be used to detect hidden objects within a distance of 5 meters with 30 mm resolution in W band at 94 GHz central frequency.

scholarly journals Quasi-Optical Design Of A Millimeter Wave Imaging System

2020 ◽  
Author(s):  
Faeze Jadidi ◽  
Abdollah Eslamimajd ◽  
Alireza Erfaniyan ◽  
Seyed Hossein Mohseni Armaki
Keyword(s):  
Millimeter Wave ◽  
Imaging System ◽  
Optical Design ◽  
Horn Antenna ◽  
Fresnel Lens ◽  
Wave Radiation ◽  
Central Frequency ◽  
Millimeter Wave Imaging ◽  
W Band ◽  
Wave Imaging

Abstract In this paper, we report complete design and simulation of a quasi-optical millimeter wave imaging system with Fresnel lens and horn Antenna using ZEMAX and FEKO softwares, respectively. It is much easier to make a Fresnel lens at millimeter wavelengths compared to spherical and aspherical lenses. The use of Fresnel lens to focus millimeter wave radiation greatly reduces the thickness and also the weight of the focusing element from 25 Kg to 4.5 Kg. A horn antenna with Gaussian profile and corrugated walls at the central frequency of 94 GHz for feeding this system is designed. The symmetry of the designed corrugated Gaussian horn radiation pattern in E and H orthogonal planes, its wide bandwidth as well as its low side lobe levels make it a good candidate for feeding a W band millimeter-wave imaging system. The designed quasi-optical imaging system has low weight with high resolution and can be used to detect hidden objects within a distance of 5 meters with 30 mm resolution in W band at 94 GHz central frequency.

Optical design and performance characteristics of an inverted ‘vee’-type Fresnel lens

1982 ◽  
Vol 11 (2) ◽  
pp. 151-165 ◽  
Author(s):  
A.K. Singhal ◽  
R.N. Singh ◽  
T.C. Kandpal ◽  
S.S. Mathur
Keyword(s):  
Optical Design ◽  
Fresnel Lens ◽  
Performance Characteristics ◽  
And Performance

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Far-Infrared Fresnel Lens for Thermal Imaging

2013 ◽  
Vol 133 (7) ◽  
pp. 274-279
Author(s):  
Tomoyuki Takahata ◽  
Kiyoshi Matsumoto ◽  
Isao Shimoyama
Keyword(s):  
Thermal Imaging ◽  
Far Infrared ◽  
Fresnel Lens
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