&lt;title&gt;Materials for mirror systems: an overview&lt;/title&gt;

Paquin, Roger A.

doi:10.1117/12.225278

Cited by 11 publications

(5 citation statements)

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“…Both describe the deformation of a part that is moved from a stable environment to another stable environment. The temperature-induced deformation is independent of the change path and a reversible deformation; the hysteresis-induced deformation is related to the change path, resulting in deformation that may be reversible or permanent [89][90][91][92].…”

Section: Dimensional Stabilitymentioning

confidence: 99%

Design and Fabrication Technology of Metal Mirrors Based on Additive Manufacturing: A Review

et al. 2021

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In recent years, much progress has been made on the development of metal mirrors based on additive manufacturing (AM). The sandwich mirror is well known for its excellent mechanical properties and challenging machining. Now, AM can be used to fabricate this complex structure and reduce the processing time and cost. In addition, with the aid of some new design methods for additive manufacturing, such as lattice, topology optimization (TO), and Voronoi, the freedom of mirror structure design is enormously improved. The common materials of mirrors include ceramics (SiC), glasses (glass ceramics, fused silica), and metals (aluminum, beryllium). Among them, the AM technology of metals is the most mature and widely used. Researchers have recently extensively developed the new-generation metal mirror to improve performance and lightweight rate. This review focuses on the following topics: (1) AM technologies and powder materials for metal mirrors, (2) recent advances in optomechanical design methods for AM metal mirrors, (3) challenges faced by AM metal mirrors in fabricating, and (4) future trends in AM metal mirrors.

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Section: Dimensional Stabilitymentioning

confidence: 99%

Design and Fabrication Technology of Metal Mirrors Based on Additive Manufacturing: A Review

et al. 2021

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“…The first is that CVD SiC is difficult to machine (low yield) and the dimensional tolerance capability and stability is often poor. 21 The second major issue with CVD SiC is that the internal stresses limit the size of the SiC blank that can be deposited. A typically cited thickness limitation is on the order of 0.6 cm.…”

Section: Sic Seed Particlementioning

confidence: 99%

“…The optical components must be lightweight and dimensionally stable under these conditions. 2 Thus, some of the more important material parameters for mirror performance include the coefficient of thermal expansion (CTE), thermal conductivity (k), and Young's modulus (E), which is a measure of material stiffness. Many applications require both lightweight and thermally stable mirrors.…”

Section: Introductionmentioning

confidence: 99%

CVC silicon carbide high-performance optical systems

Fischer¹,

Foss²

2004

SPIE Proceedings

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The demand for high performance lightweight mirrors has never been greater. The coming years will require lighter and higher performance mirrors and in greater numbers than is currently available. Applications include both ground and space based telescopes, surveillance, navigation, guidance, and tracking and control systems. For instance, the total requirement for US government sponsored systems alone is projected to be greater than 200 m 2 /year 1 . Given that the total current global production capacity is on the order of 50 m 2 /year 1 , the need and opportunity to rapidly produce high quality optics is readily apparent. Key areas of concern for all these programs are not only the mission critical optical performance metrics, but also the ability to meet the timeline for deployment. As such, any potential reduction in the long lead times for manufactured optical systems and components is critical. The associated improvements with such advancements would lead to reductions in schedule and acquisition cost, as well as increased performance. Trex's patented CVC SiC process is capable of rapidly producing high performance SiC optics for any optical system. This paper will summarize the CVC SiC production process and the current optical performance levels, as well as future areas of work.

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“…SiC can provide the excellent weight and performance, not only for the component level but also for the system level. When SiC mirror is combined with SiC structure, the mirror and the structure have matching coeffi cient of thermal expansion (CTE) over all temperatures and thus create an thermal system, which signifi cantly reduces design complexity, weight, testing and integration [3,4] . The study on SiC systems was began from 1990s and concentrated in America and Europe [5,6] .…”

Section: Introductionmentioning

confidence: 99%

Optimum design of lightweight silicon carbide mirror assembly

Han

Zhang

et al. 2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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According to the design requirement and on the basis of the principle that the thermal expansion coeffi cient of the support structure should match with that of the mirror, a lightweight silicon carbide primary mirror assembly was designed. Finite element analysis combined with the parameter-optimized method was used during the design. Lightweight cell and rigid rib structure were used for the mirror assembly. The static, dynamic and thermal properties of the primary mirror assembly were analyzed. It is shown that after optimization, the lightweight ratio of the silicon carbide mirror is 52.5%, and the rigidity of the silicon carbide structure is high enough to support the required mirror. When temperature changes, the deformation of the mirror surface is in proportion to the temperature difference.

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<title>Materials for mirror systems: an overview</title>

Cited by 11 publications

References 0 publications

Design and Fabrication Technology of Metal Mirrors Based on Additive Manufacturing: A Review

Design and Fabrication Technology of Metal Mirrors Based on Additive Manufacturing: A Review

CVC silicon carbide high-performance optical systems

Optimum design of lightweight silicon carbide mirror assembly

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