Recent advances in reaction bonded silicon carbide optics and optical systems

Robichaud, Joseph L.; Schwartz, Jay R.; Landry, David; Glenn, William H.; Rider, Brian; Chung, Michael

doi:10.1117/12.617406

Cited by 8 publications

(2 citation statements)

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“…Silicon carbide (SiC) is one of the preferred materials for manufacturing optical mirrors due to its unique characteristics of low density, high strength, low thermal expansion, high thermal conductivity and high chemical inertness [1,2]. According to the theory of total integrated scattering (TIS), the total surface scattering of a mirror is closely related to its surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Studies of Over-Polishing of Silicon Carbide in Annular Polishing

Zhang

Han

Liu³

et al. 2018

Machines

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Annular polishing technology is an important optical machining method for achieving a high-precision mirror surface on silicon carbide. However, the inevitable over-polishing of the specimen edge in annular polishing deteriorates achieved surface quality. In the present work, we first analytically investigate the kinematic coupling of multiple relative motions in the annular polishing process and subsequently derive an analytical model that addresses the principle of material removal at specimen edge based on the Preston equation and the rigid body contact model. We then perform finite element simulations and experiments involving annular polishing of silicon carbide (SiC), which jointly exhibit agreement with the derived analytical model of material removal.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Studies of Over-Polishing of Silicon Carbide in Annular Polishing

Zhang

Han

Liu³

et al. 2018

Machines

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“…Nonetheless, in recent years, developers around the world have been honing silicon carbide mirror manufacturing technologies to enable the production of large-scale silicon carbide mirrors for use in telescopes. [1][2][3][4] For example, the 3.5m-diameter primary mirror of the Herschel Space Observatory was fabricated in this way. Indeed, this telescope-until recently the largest IR telescope mirror in the world-was brazed by 12 monolithic, sintered silicon carbide ceramics.…”

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confidence: 99%