Multi-material mirror system
US-10877237-B2 · Dec 29, 2020 · US
Method of manufacture for a lightweight, high-precision silicon carbide mirror assembly
US11327208B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11327208-B2 |
| Application number | US-201815993513-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 30, 2018 |
| Priority date | May 30, 2018 |
| Publication date | May 10, 2022 |
| Grant date | May 10, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
An aerospace mirror having a reaction bonded (RB) silicon carbide (SiC) mirror substrate, and a SiC cladding on the RB SiC mirror substrate forming an optical surface on a front side of the aerospace mirror. A method for manufacturing an aerospace mirror comprising obtaining a green mirror preform comprising porous carbon, silicon carbide (SiC), or both, the green mirror preform defining a front side of the aerospace mirror and a back side of the aerospace mirror opposite the front side; removing material from the green mirror preform to form support ribs on the back side; infiltrating the green mirror preform with silicon to create a reaction bonded (RB) SiC mirror substrate from the green mirror preform; forming a mounting interface surface on the back side of the aerospace mirror from the RB SiC mirror substrate, and forming a reflector surface of the RB SiC mirror substrate on the front side of the aerospace mirror. Additionally, the method can comprise cladding the reflector surface of the RB SiC mirror substrate with SiC to form an optical surface of the aerospace mirror.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for manufacturing an aerospace mirror, comprising: obtaining a green mirror preform comprising porous carbon, silicon carbide (SiC), or both, the green mirror preform defining a front side of the aerospace mirror and a back side of the aerospace mirror opposite the front side; removing material from the green mirror preform to form support ribs on the back side; infiltrating the green mirror preform with silicon to create a reaction bonded (RB) SiC mirror substrate from the green mirror preform; forming a mounting interface surface on the back side of the aerospace mirror from the RB SiC mirror substrate, the mounting interface surface being formed through at least one of the support ribs to facilitate bonding with an attachment fitting, and forming a reflector surface of the RB SiC mirror substrate on the front side of the aerospace mirror; and cladding the reflector surface of the RB SiC mirror substrate with SiC to form an optical surface of the aerospace mirror. 2. The method of claim 1 , wherein removing material comprises machining. 3. The method of claim 1 , wherein infiltrating the green mirror preform with silicon comprises infiltrating the green mirror preform with molten silicon. 4. The method of claim 1 , wherein forming the mounting interface surface comprises machining. 5. The method of claim 1 , wherein forming the reflector surface comprises machining. 6. The method of claim 5 , wherein machining comprises milling. 7. The method of claim 1 , wherein cladding the reflector surface with SiC comprises cladding, using a chemical vapor deposition (CVD) process. 8. The method of claim 1 , further comprising grinding the optical surface, polishing the optical surface, or both. 9. The method of claim 1 , further comprising applying an optical coating on the optical surface.
Assignees
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Classifications
Porous or lightweight materials · CPC title
Liquid infiltration of green bodies or pre-forms · CPC title
comprising inorganic materials only · CPC title
- G02B5/0808Primary
having a single reflecting layer (G02B5/0883, G02B5/0891 take precedence) · CPC title
Silicon · CPC title
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Frequently asked questions
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- What does patent US11327208B2 cover?
- An aerospace mirror having a reaction bonded (RB) silicon carbide (SiC) mirror substrate, and a SiC cladding on the RB SiC mirror substrate forming an optical surface on a front side of the aerospace mirror. A method for manufacturing an aerospace mirror comprising obtaining a green mirror preform comprising porous carbon, silicon carbide (SiC), or both, the green mirror preform defining a fron…
- Who is the assignee on this patent?
- Raytheon Co
- What technology area does this patent fall under?
- Primary CPC classification G02B5/0808. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 10 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).