Claims
- 1. A method of forming a hollow waveguide, through which radiation can propagate along a longitudinal axis, including the steps of:
- (a) forming a coated substrate by depositing an optical coating on a substantially flat substrate having a left face and a right face; and
- (b) forming a folded, coated substrate having a polygonal cross-section in a plane perpendicular to the longitudinal axis, by folding the coated substrate to cause the left face to meet the right face, so that the folded, coated substrate encloses a volume extending along the longitudinal axis, wherein the folded, coated substrate is highly reflective of electromagnetic radiation having grazing incidence, wherein the substantially flat substrate is a metal substrate, and the optical coating is a multi-layer dielectric coating on the metal substrate.
- 2. A method of forming a hollow waveguide, through which radiation can propagate along a longitudinal axis, including the steps of:
- (a) forming a coated substrate by depositing an optical coating on a substantially flat substrate having a left face and a right face; and
- (b) forming a folded, coated substrate having a polygonal cross-section in a plane perpendicular to the longitudinal axis, by folding the coated substrate to cause the left face to meet the right face, so that the folded, coated substrate encloses a volume extending along the longitudinal axis, wherein the folded, coated substrate is highly reflective of electromagnetic radiation having grazing incidence, wherein the substantially flat substrate has substantially parallel indentations defining relatively thin portions thereof, wherein each of the relatively thin portions separates two relatively thick portions of the substantially flat substrate, and wherein step (b) includes the step of folding the substantially flat substrate along said indentations.
- 3. The method of claim 2, wherein the indentations are shaped so that performance of step (b) causes each of said indentations to define a region separate from the volume.
Parent Case Info
Cross-Reference to Related Application
This is a division of U.S. Pat. application Ser. No. 07/959,699, filed Oct. 13, 1992, issued on Jul. 26, 1994 as U.S. Pat. No. 5,333,090.
US Referenced Citations (18)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0236030 |
Sep 1987 |
EPX |
3041720 |
Nov 1982 |
DEX |
57-13412 |
Jan 1982 |
JPX |
1558970 |
Jan 1980 |
GBX |
2195787 |
Apr 1988 |
GBX |
WO8602775 |
May 1986 |
WOX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
959699 |
Oct 1992 |
|