US 12,339,116 B1
Non-contact optical axis and pupil center detection apparatus
Wei Zhou, Sammamish, WA (US); Dong Liu, Nanjing (CN); and Michael Zhang, Los Altos, CA (US)
Assigned to MLOptic Corp., Redmond, WA (US)
Filed by MLOptic Corp, Redmond, WA (US)
Filed on Jan. 16, 2025, as Appl. No. 19/025,771.
Int. Cl. G01B 11/27 (2006.01)
CPC G01B 11/272 (2013.01) 11 Claims
OG exemplary drawing
 
1. An apparatus for indicating a misalignment of an optical axis of a lens system having at least one lens, a front end and a rear end, the at least one lens having a front surface and a rear surface, said apparatus comprising:
(a) a light source;
(b) a first mirror;
(c) a first beam splitter;
(d) an image sensor;
(e) a motion stage configured for receiving the lens system; and
(f) a controller,
wherein a laser beam of said light source is configured to be directed at said first beam splitter to result in a first beam and a second beam, said first beam is redirected at said first mirror before being redirected by said first mirror through said first beam splitter to cast a first spot at said image sensor, and said second beam is disposed through said first beam splitter to be directed at the front surface of the lens system before being reflected back by the lens system and redirected by said first beam splitter to cast at least one second spot at said image sensor, said controller is configured to determine if said at least one second spot and said said first spot are concentrically disposed, if said at least one second spot and said first spot are not concentrically disposed, a misalignment of an optical axis of the lens system with said laser beam is said to have occurred and said controller is further configured to control said motion stage until said at least one second spot and said first spot are concentrically disposed.