US 11,654,629 B2
Mirror assemblies for three dimensional printers
Camilo Andres Moreno Cleves, Palo Alto, CA (US); and Krzysztof Nauka, Palo Alto, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/257,342
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Oct. 26, 2018, PCT No. PCT/US2018/057677
§ 371(c)(1), (2) Date Dec. 31, 2020,
PCT Pub. No. WO2020/086091, PCT Pub. Date Apr. 30, 2020.
Prior Publication US 2021/0268737 A1, Sep. 2, 2021
Int. Cl. B29C 64/153 (2017.01); B29C 64/264 (2017.01); B33Y 30/00 (2015.01); G02B 5/10 (2006.01); B29C 64/291 (2017.01); B33Y 10/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/291 (2017.08) [B29C 64/153 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); G02B 5/10 (2013.01); B33Y 50/02 (2014.12)] 9 Claims
OG exemplary drawing
 
1. A mirror assembly, comprising:
a first side; and
a second side, wherein the first side is symmetrical to the second side and capable of enclosing a cylindrical light source, wherein the first side and the second side each comprise:
a first curved reflective surface, wherein the first curved reflective surface comprises a truncated circle involute; and
a second curved reflective surface, wherein an end of the first curved reflective surface and a beginning of the second curved reflective surface form an edge along a surface formed by the first curved reflective surface and the second curved reflective surface, wherein the second curved reflective surface is defined by at least two adjacent continuous segments, wherein each one of the at least two adjacent continuous segment is defined by a different polynomial having a fourth order or higher.