Image capture unit in a surgical instrument
In a minimally invasive surgical system, an image capture unit includes a prism assembly and sensor assembly. The prism assembly includes a beam splitter, while the sensor assembly includes coplanar image capture sensors. Each of the coplanar image capture sensors has a common front end optical structure, e.g., the optical structure distal to the image capture unit is the same for each of the sensors. A controller enhances images acquired by the coplanar image capture sensors. The enhanced images may include (a) visible images with enhanced feature definition, in which a particular feature in the scene is emphasized to the operator of minimally invasive surgical system; (b) images having increased image apparent resolution; (c) images having increased dynamic range; (d) images displayed in a way based on a pixel color component vector having three or more color components; and (e) images having extended depth of field.
1. An apparatus comprising:
a distal end surface of the apparatus;
a first image capture sensor comprising a first sensor surface;
a second image capture sensor comprising a second sensor surface, a distal end of the first image capture sensor being closer to the distal end surface than a distal end of the second image capture sensor, the first sensor surface being in a first plane, and the second sensor surface being in a second plane; wherein the first and second planes are parallel, and wherein the first and second planes are parallel to a longitudinal axis of the apparatus;
a first lens assembly;
a second lens assembly; and
a reflective unit positioned to receive light that passes through the first lens assembly and to reflect received light from the first lens assembly in a first direction onto the first sensor surface, and positioned to receive light that passes through the second lens assembly and to reflect received light from the second lens assembly in the first direction onto the second sensor surface,
wherein a first optical path length from the first lens assembly to the first sensor surface is about equal to a second optical path length from the second lens assembly to the second sensor surface.
2. The apparatus of claim 1 , wherein the first and second sensor surfaces are coplanar.
3. The apparatus of claim 1 , the first and second planes being separated by a known distance.