US 12,268,537 B2
Visible light projection indicator for dental X-ray imaging apparatus and method of using same
Fangkai Han, Shanghai (CN); and Jue Li, Shanghai (CN)
Assigned to Fangkai Han, Shanghai (CN)
Filed by Fangkai HAN, Shanghai (CN)
Filed on Feb. 7, 2023, as Appl. No. 18/106,772.
Application 18/106,772 is a continuation in part of application No. PCT/CN2020/126050, filed on Nov. 3, 2020.
Claims priority of application No. 202010789470.6 (CN), filed on Aug. 7, 2020; application No. 202010795582.2 (CN), filed on Aug. 10, 2020; application No. 202010797643.9 (CN), filed on Aug. 10, 2020; and application No. 202010861840.2 (CN), filed on Aug. 25, 2020.
Prior Publication US 2023/0263486 A1, Aug. 24, 2023
Int. Cl. A61B 6/08 (2006.01); A61B 6/51 (2024.01)
CPC A61B 6/08 (2013.01) [A61B 6/51 (2024.01)] 15 Claims
OG exemplary drawing
 
1. A visible light projection indicator for a dental x-ray imaging apparatus, comprising:
a casing, one end of the casing detachably affixed to a beam-limiting cone in the dental x-ray imaging apparatus, the other end thereof provided with a light exit aperture;
a visible light source positioned in the casing and configured to be able to emit visible light;
a light passage being formed after the casing is affixed to the beam-limiting cone so that visible light emitted from the visible light source is able to travel along the light passage and exits from the light exit aperture;
wherein the casing comprises an annular base, and the visible light source is mounted in the annular base;
wherein the casing further comprises a double-layer cylindrical structure connected to openings at opposing ends of the annular base, the double-layer cylindrical structure comprising an inner tube disposed on an inner side and an outer tube disposed on an outer side, the light passage being formed between an outer surface of the inner tube and an inner surface of the outer tube.