Fabrication of fresnel lens by glass molding technique

Huang, Chien-Yao; Chen, Chun‐Chieh; Chou, Hsiao-Yu; Chou, Chang‐Pin

doi:10.1007/s10043-013-0035-0

Cited by 16 publications

(5 citation statements)

References 3 publications

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“…In addition, the optical concentrator system based on our designed linear Fresnel lens does not need to use SOE so that the cost of module is decreased significantly comparing to other types of optical concentrators. In term of production cost of the lens, there are some technologies to manufacture Fresnel lens or Primary optical component (POE) for CPV system, such as the embossing method (Zhang et al [53]), molding method (Huang et al [54]), and extrusion method (Benz et al [55]). The conventional linear Fresnel lens can be manufactured easily by these methods.…”

Section: Performance and Discussionmentioning

confidence: 99%

Novel Design of Primary Optical Elements Based on a Linear Fresnel Lens for Concentrator Photovoltaic Technology

Pham

Shin

2019

Energies

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In this paper, we present a design and optical simulation of a novel linear Fresnel lens. The lens can be applied to a concentrator photovoltaic (CPV) system as a primary optical element (POE) to increase the concentration ratio and improve the uniformity of irradiance distribution over the receiver. In addition, the CPV system can use the proposed lens as a concentrator without involving a secondary optical element (SOE). The designed lens, which is a combination of two linear Fresnel lenses placed perpendicular to each other, can collect and distribute the direct sunlight on two dimensions. The lens is first designed in the MATLAB program, based on the edge ray theorem, Snell’s law, and the conservation of the optical path length, and then drawn in three dimensions (3D) by using LightToolsTM. Furthermore, in order to optimize the structure and investigate the performance of the lens, the ray tracing and the simulation are also performed in LightToolsTM. The results show that the newly designed lens can achieve a high concentration ratio of 576 times, a high optical efficiency of 82.4%, an acceptable tolerance of 0.84°, and high uniform irradiance of around 77% for both horizontal and vertical investigation lines over the receiver.

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Section: Performance and Discussionmentioning

confidence: 99%

Novel Design of Primary Optical Elements Based on a Linear Fresnel Lens for Concentrator Photovoltaic Technology

Pham

Shin

2019

Energies

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“…To minimize errors in form, finite element method (FEM) simulations were conducted before the precision grinding process. Huang et al [ 81 ] also used diamond grinding to develop a Fresnel lens with three concentric rings with a teeth height of 50 to 220 µm. A platinum–iridium (Pt–Ir) alloy coating layer as a protective layer was applied to the mold before glass transcription.…”

Section: Mold Materials For Precision Glass Moldingmentioning

confidence: 99%

“…A summary of previous reports of micro/nano glass molding with WC molds is presented in Table S4 in the Supplementary Material [ 22 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 ]. WC molds offer high hardness, good chemical resistance, and good thermal conductivity.…”

Section: Mold Materials For Precision Glass Moldingmentioning

confidence: 99%

A Comprehensive Review of Micro/Nano Precision Glass Molding Molds and Their Fabrication Methods

et al. 2021

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Micro/nano-precision glass molding (MNPGM) is an efficient approach for manufacturing micro/nanostructured glass components with intricate geometry and a high-quality optical finish. In MNPGM, the mold, which directly imprints the desired pattern on the glass substrate, is a key component. To date, a wide variety of mold inserts have been utilized in MNPGM. The aim of this article is to review the latest advances in molds for MNPGM and their fabrication methods. Surface finishing is specifically addressed because molded glass is usually intended for optical applications in which the surface roughness should be lower than the wavelength of incident light to avoid scattering loss. The use of molds for a wide range of molding temperatures is also discussed in detail. Finally, a series of tables summarizing the mold fabrication methods, mold patterns and their dimensions, anti-adhesion coatings, molding conditions, molding methods, surface roughness values, glass substrates and their glass transition temperatures, and associated applications are presented. This review is intended as a roadmap for those interested in the glass molding field.

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“…The effect of the width of the die V-groove on the curvature and filled area of the molding glass microlens were investigated, but the influence of process parameters has not been studied [23]. The glass Fresnel lens was embossed with consideration of the process parameters, and indicated that the glass preform was easy to break under excessive molding force at low molding temperature [24]. Similarly, it was also revealed that the glass protrusion crack was generated at high imprinting pressure [25].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on Hot-Embossing of Glass-Microprism Array without Online Cooling Process

Xie

et al. 2020

Micromachines

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Optical glass-microprism arrays are generally embossed at high temperatures, so an online cooling process is needed to remove thermal stress, but this make the cycle long and its equipment expensive. Therefore, the hot-embossing of a glass-microprism array at a low strain rate with reasonable embossing parameters was studied, aiming at reducing thermal stress and realizing its rapid microforming without online cooling process. First, the flow-field, strain-rate, and deformation behavior of glass microforming were simulated. Then, the low-cost microforming control device was designed, and the silicon carbide (SiC) die-core microgroove array was microground by the grinding-wheel microtip. Lastly, the effect of the process parameters on forming rate was studied. Results showed that the appropriate embossing parameters led to a low strain rate; then, the trapezoidal glass-microprism array could be formed without an online cooling process. The standard deviation of the theoretical and experimental forming rates was only 7%, and forming rate increased with increasing embossing temperature, embossing force, and holding duration, but cracks and adhesion occurred at a high embossing temperature and embossing force. The highest experimental forming rate reached 66.56% with embossing temperature of 630 °C, embossing force of 0.335 N, and holding duration of 12 min.

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Fabrication of fresnel lens by glass molding technique

Cited by 16 publications

References 3 publications

Novel Design of Primary Optical Elements Based on a Linear Fresnel Lens for Concentrator Photovoltaic Technology

Novel Design of Primary Optical Elements Based on a Linear Fresnel Lens for Concentrator Photovoltaic Technology

A Comprehensive Review of Micro/Nano Precision Glass Molding Molds and Their Fabrication Methods

Theoretical and Experimental Study on Hot-Embossing of Glass-Microprism Array without Online Cooling Process

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