US 12,140,377 B2
Method and device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein
Tomas Lock, Laholm (SE); Björn Löfving, Kärna (SE); and Markus Ramsperger, Gothenburg (SE)
Assigned to Arcam AB, Mölnlycke (SE)
Appl. No. 17/287,760
Filed by ARCAM AB, Mölnlycke (SE)
PCT Filed Apr. 2, 2019, PCT No. PCT/EP2019/058275
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/083531, PCT Pub. Date Apr. 30, 2020.
Claims priority of provisional application 62/748,726, filed on Oct. 22, 2018.
Prior Publication US 2021/0394271 A1, Dec. 23, 2021
Int. Cl. G01N 21/15 (2006.01); B22F 10/20 (2021.01); B22F 10/28 (2021.01); B22F 10/85 (2021.01); B22F 12/00 (2021.01); B22F 12/82 (2021.01); B22F 12/90 (2021.01); F27D 21/02 (2006.01); G02B 27/00 (2006.01); B22F 10/32 (2021.01); B22F 12/41 (2021.01); B22F 12/50 (2021.01); B22F 12/55 (2021.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/00 (2015.01)
CPC F27D 21/02 (2013.01) [B22F 10/28 (2021.01); B22F 10/85 (2021.01); B22F 12/38 (2021.01); B22F 12/82 (2021.01); B22F 12/90 (2021.01); B22F 10/32 (2021.01); B22F 12/41 (2021.01); B22F 12/50 (2021.01); B22F 12/55 (2021.01); B22F 2201/10 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/00 (2014.12)] 18 Claims
OG exemplary drawing
 
1. A device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein, the device comprising:
a first section with a through hole having a first end with a first opening and a second end with a second opening;
a second section having a chamber comprising a first opening, a second opening and a gas inlet, where the second opening of the second section is covered with a first window, wherein the first section is attached to the second section, allowing unobstructed passage between the gas inlet and the first section, wherein the first window is in line of sight with the second opening of the first section and the gas inlet is connectable to a gas reservoir for feeding a gas into the chamber for prohibiting the first window in the chamber from being contaminated of the condensable vapor; and
a reflective element disposed within the chamber along a central optical path between the first opening and the first window;
wherein the first opening of the first section is smaller than the second opening of the first section.