Dr. Douglas R. McCarter Profile

Dr. Douglas R. McCarter

Consultant at McCarter Machine Inc

SPIE Involvement:

Author

Area of Expertise:

troubleshooting , design , inspection , tooling , manufacturing , machining

Websites:

Company Website

Proceedings Article | 28 July 2014 Paper

Space invader asteroids: detect and deter with silicon space based lasers

Douglas McCarter, Roger Paquin

Proceedings Volume 9151, 91510L (2014) https://doi.org/10.1117/12.2058020

KEYWORDS: Asteroids, Mirrors, Space telescopes, Silicon, Telescopes, Space based lasers, Laser energy, Semiconductor lasers, Glasses, Crystals

Read Abstract +

Proceedings Article | 30 September 2013 Paper

Isotropic behavior of an anisotropic material: single crystal silicon

Douglas McCarter, Roger Paquin

Proceedings Volume 8837, 883707 (2013) https://doi.org/10.1117/12.2025770

KEYWORDS: Silicon, Crystals, Mirrors, Glasses, Finite element methods, Diamond, Distortion, Space telescopes, Telescopes, Aluminum

Read Abstract +

Zero defect single crystal silicon (Single-Crystal Si), with its diamond cubic crystal structure, is completely isotropic in most properties important for advanced aerospace systems. This paper will identify behavior of the three most dominant planes of the Single-Crystal Si cube (110), (100) and (111). For example, thermal and optical properties are completely isotropic for any given plane. The elastic and mechanical properties however are direction dependent. But we show through finite element analysis that in spite of this, near-isotropic behavior can be achieved with component designs that utilize the optimum elastic modulus in directions with the highest loads. Using glass frit bonding to assemble these planes is the only bonding agent that doesn’t degrade the performance of Single-Crystal Si. The most significant anisotropic property of Single-Crystal Si is the Young’s modulus of elasticity. Literature values vary substantially around a value of 145 GPa. The truth is that while the maximum modulus is 185 GPa, the most useful <110< crystallographic direction has a high 169 GPa, still higher than that of many materials such as aluminum and invar. And since Poisson’s ratio in this direction is an extremely low 0.064, distortion in the plane normal to the load is insignificant. While the minimum modulus is 130 GPa, a calculated average value is close to the optimum at approximately 160 GPa. The minimum modulus is therefore almost irrelevant. The (111) plane, referred to as the natural cleave plane survives impact that would overload the (110) and/or (100) plane due to its superior density. While mechanical properties vary from plane to plane each plane is uniform and response is predictable. Understanding the Single-Crystal Si diamond cube provides a design and manufacture path for building lightweight Single-Crystal Si systems with near-isotropic response to loads. It is clear then that near-isotropic elastic behavior is achievable in Single-Crystal Si components and will provide subsecond thermal equilibrium and sub-micron creep.

Proceedings Article | 13 September 2012 Paper

Development of a cryogenic all-silicon telescope (CAIT)

Douglas McCarter, Eloise McCarter, Roger Paquin

Proceedings Volume 8450, 845026 (2012) https://doi.org/10.1117/12.927863

KEYWORDS: Silicon, Space telescopes, Glasses, Mirrors, Telescopes, Silicon carbide, Metals, Space operations, Distortion, Optical instrument design

Read Abstract +

Proceedings Article | 22 August 2009 Paper

Why silicon for telescope mirrors and structures?

Roger Paquin, Douglas McCarter

Proceedings Volume 7425, 74250E (2009) https://doi.org/10.1117/12.824887

KEYWORDS: Mirrors, Silicon, Telescopes, Silicon carbide, Beryllium, Crystals, Space telescopes, Neodymium, Aluminum, Temperature metrology

Read Abstract +

Proceedings Article | 6 May 2009 Paper

Lightweight single crystal silicon opto-mechanical structures

Roger Paquin, Douglas McCarter

Proceedings Volume 7330, 73300H (2009) https://doi.org/10.1117/12.817360

KEYWORDS: Silicon, Aluminum, Mirrors, Crystals, Manufacturing, Metals, Solids, Ions, Neodymium, Optical components

Read Abstract +

Proceedings Article | 17 September 2007 Paper

Design and fabrication of a single crystal silicon (SCSi) telescope: a success story

Douglas McCarter, Roger Paquin, Eloise McCarter

Proceedings Volume 6666, 66660F (2007) https://doi.org/10.1117/12.734453

KEYWORDS: Silicon, Telescopes, Mirrors, Beryllium, Optical instrument design, Crystals, Optics manufacturing, Manufacturing, Metals, Oxygen

Read Abstract +

Proceedings Article | 12 December 2003 Paper

Frit bonding: a way to larger and more complex silicon components

Frank Anthony, Douglas McCarter, Matthew Tangedahl, Mallory Wright

Proceedings Volume 5179, (2003) https://doi.org/10.1117/12.501546

KEYWORDS: Silicon, Mirrors, Glasses, Custom fabrication, Lab on a chip, Cryogenics, Space mirrors, Surface finishing, Polishing, Assembly tolerances

Read Abstract +

Proceedings Article | 25 November 2002 Paper

Cryostable lightweight frit-bonded silicon mirror

Frank Anthony, Douglas McCarter, Matt Tangedahl, David Content

Proceedings Volume 4822, (2002) https://doi.org/10.1117/12.451712

KEYWORDS: Mirrors, Silicon, Silicon carbide, Glasses, Spherical lenses, Lightweight mirrors, Polishing, Aluminum, Surface finishing, Optical fabrication

Read Abstract +

Proceedings Article | 5 January 2001 Paper

McCarter superfinish grinding for silicon: an update

Frank Anthony, Ali Khounsary, Douglas McCarter, S. Krasnicki, Matt Tangedahl

Proceedings Volume 4145, (2001) https://doi.org/10.1117/12.411655

KEYWORDS: Silicon, Crystals, X-rays, Particles, Wave plates, Surface finishing, Copper, X-ray diffraction, Etching, Diamond wheels

Read Abstract +

Proceedings Article | 11 November 1999 Paper

McCarter Superfinish for silicon

Frank Anthony, Douglas McCarter, Jeff Bertelsen, Matt Tangedahl

Proceedings Volume 3782, (1999) https://doi.org/10.1117/12.369223

KEYWORDS: Silicon, Silicon carbide, Diamond wheels, Curium, Surface finishing, Scanning electron microscopy, Visualization, Polishing, Diamond machining, Radium

Read Abstract +

Showing 5 of 10 publications

Conference Committee Involvement (1)

Optical Materials and Structures Technologies

4 August 2003 | San Diego, California, United States

Keywords/Phrases

Search In:

Publication Years