Imaging assembly with transparent distal cap
An imaging assembly for use in a medical imaging device such as an endoscope or the like. In one embodiment, the imaging assembly includes a transparent distal cap that is shaped to receive an image sensor insert. The image sensor insert has a cooling channel that supplies a cooling liquid or gas to one or more illumination sources.
1. An assembly for an imaging medical device, comprising:
a transparent distal cap, said transparent distal cap having a distal face surface with a perimeter surrounding an entirety of the distal face surface; and
an image sensor insert that is fitted within the transparent distal cap, the image sensor insert including:
one or more illumination sources;
a cooling channel for removing heat from the one or more illumination sources;
a cylindrical bore adapted to accommodate one or more imaging lenses; and
an image sensor;
wherein the transparent distal cap includes one or more integral windows positioned in front of the one or more illumination sources, wherein the one or more windows have an edge that extends to the perimeter.
2. The assembly of claim 1 , wherein the image sensor insert also includes a thermistor thermally coupled to the one or more illumination sources.
3. The assembly of claim 2 , wherein the thermistor is positioned between the one or more illumination sources.
4. The assembly of claim 1 , wherein the one or more illumination sources are LEDs.
5. The assembly of claim 4 , wherein the image sensor insert includes a flex circuit that delivers current to the LEDs.
6. The assembly of claim 5 , wherein the image sensor insert includes a channel positioned over the image sensor insert in which the flex circuit is positioned.
7. The assembly of claim 1 , wherein the transparent distal cap is molded of a clear plastic material.
8. The assembly of claim 1 , wherein the edge of the transparent distal cap is rounded.
9. The assembly of claim 1 , further including a transillumination light source positioned behind the transparent distal cap that produces light to locate a distal tip of the medical device.
10. The assembly of claim 9 , wherein the transillumination light source is an LED.
11. The assembly of claim 10 , wherein the transillumination LED produces red light.
12. The assembly of claim 1 , wherein the image sensor insert is generally semicircular in shape.
13. The assembly of claim 1 , wherein the transparent distal cap further includes an opening that serves as an entrance to a working channel and wherein a rim of the transparent distal cap is beveled in the area of the opening.