US 12,217,623 B2
Demonstration device for photochromic lenses
William D. Carpenter, Tuam (IE)
Assigned to Transitions Optical, Ltd., Tuam (IE)
Appl. No. 17/427,245
Filed by Transitions Optical, Ltd., Tuam (IE)
PCT Filed Jan. 31, 2019, PCT No. PCT/EP2019/052336
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2020/156669, PCT Pub. Date Aug. 6, 2020.
Prior Publication US 2022/0122485 A1, Apr. 21, 2022
Int. Cl. G09B 23/22 (2006.01); G01M 11/02 (2006.01)
CPC G09B 23/22 (2013.01) [G01M 11/0285 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A demonstration device for demonstrating at least one thermally-reversible characteristic of an optical article having at least one photochromic material, the demonstration device comprising:
a housing having a sidewall defining an interior, wherein at least a portion of the sidewall is transparent to allow viewing of the housing interior from the outside of the housing through the sidewall;
an inspection platform within the interior of the housing configured for supporting at least a portion of the optical article;
at least one ultraviolet light source configured to radiate ultraviolet light into the interior of the housing;
at least one inspection light source configured to illuminate at least a portion of the interior of the housing; and
at least one heating device configured to heat at least a portion of the interior of the housing,
wherein the at least one heating device comprises at least one heat source and at least one fan.