US 12,376,807 B2
Collimator for dental X-ray imaging apparatus
Fangkai Han, Shanghai (CN); and Jue Li, Shanghai (CN)
Assigned to Fangkai Han, Shanghai (CN)
Filed by Fangkai Han, Shanghai (CN)
Filed on Feb. 27, 2023, as Appl. No. 18/114,801.
Application 18/114,801 is a continuation in part of application No. PCT/CN2020/134207, filed on Dec. 7, 2020.
Claims priority of application No. 202010897300.X (CN), filed on Aug. 31, 2020; and application No. 202010899150.6 (CN), filed on Aug. 31, 2020.
Prior Publication US 2023/0277143 A1, Sep. 7, 2023
Int. Cl. A61B 6/14 (2006.01); A61B 6/06 (2006.01); A61B 6/08 (2006.01); A61B 6/51 (2024.01)
CPC A61B 6/06 (2013.01) [A61B 6/08 (2013.01); A61B 6/51 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A collimator for a dental X-ray imaging apparatus, comprising:
a housing having a first end and a second end, which oppose each other, the first end of the housing provided thereat with a light exit aperture, the second end of the housing secured to the dental X-ray imaging apparatus so as to define a light passage so that X-rays emitted from the dental X-ray imaging apparatus are able to travel through the light passage and exit from the light exit aperture;
a securing means disposed at the second end of the housing, with which the housing is detachably secured to a beam-limiting cone in the dental X-ray imaging apparatus;
a visible light source placed within the housing and configured to be able to emit visible light;
a window member disposed at the first end of the housing and configured to allow visible light and X-rays to transmit therethrough and be projected and irradiated onto an object to be imaged;
a light-reflecting plate placed in the housing obliquely with respect to a longitudinal axis of the light passage and configured to be able to reflect visible light emitted from the visible light source so that the reflected visible light is able to pass through the window member and be projected on the object to be imaged;
a beam-limiting member disposed between the light-reflecting plate and the window member and configured to disallow transmission of visible light and X-rays therethrough and hence define the light exit aperture.