US 11,767,250 B2
Systems and methods for vacuum-forming aspheric mirrors
Kyubong Chae, Suwon-si (KR); Hong-keun Jee, Asan-si (KR); BongChul Kim, Asan-si (KR); Jonghwa Kim, Cheonan-si (KR); Taemun Kim, Asan-si (KR); and Myoung-se Lee, Cheonan-si (KR)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 16/768,378
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Nov. 30, 2018, PCT No. PCT/KR2018/015092
§ 371(c)(1), (2) Date May 29, 2020,
PCT Pub. No. WO2019/108016, PCT Pub. Date Jun. 6, 2019.
Claims priority of provisional application 62/592,570, filed on Nov. 30, 2017.
Prior Publication US 2020/0385301 A1, Dec. 10, 2020
Int. Cl. C03B 23/03 (2006.01); C03B 23/035 (2006.01); B60K 35/00 (2006.01); G02B 5/10 (2006.01); G02B 27/01 (2006.01)
CPC C03B 23/0357 (2013.01) [B60K 35/00 (2013.01); G02B 5/10 (2013.01); G02B 27/0101 (2013.01); B60K 2370/1529 (2019.05); B60K 2370/81 (2019.05); C03B 2225/02 (2013.01); G02B 2027/013 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of forming a three-dimensional mirror for a heads-up display (HUD) system, the method comprising:
providing a glass-based preform having a first major surface, a second major surface opposite to the first major surface, and a minor surface connecting the first and second major surfaces, the minor surface comprising first and second longitudinal side surfaces opposite to each other and first and second transverse side surfaces connecting the longitudinal side surfaces;
disposing the glass-based preform on a mold having a concave surface such that the second major surface faces the concave surface of the mold, and such that the first and second longitudinal side surfaces are adjacent to a longitudinal wall of a housing, the longitudinal wall extending from the concave surface to at least a height of the second major surface of the glass-based preform, wherein the concave surface comprises at least one opening for supplying a vacuum to a gap between the second major surface and the concave surface;
supplying a vacuum to the gap; and
conforming the second major surface to the concave surface of the mold using the vacuum, wherein the at least one opening for supplying the vacuum to the gap does not contact an effective area of the three-dimensional mirror,
wherein the first and second transverse side surfaces have a curved shape corresponding to a curve of the concave surface such that the first and second transverse side surfaces contact the concave surface when the glass-based preform is disposed on the mold in a two-dimensional shape and remain coincident with the concave surface during the conforming of the second major surface,
wherein the glass-based preform is not cut after the conforming.