Dual view endoscope
First Claim
Patent Images
1. A dual view endoscope comprising an elongated outer tubular barrel having proximal and distal ends and having optical entrance apertures at its distal end;
- a first field lens mounted within said distal end of said barrel having an optical axis extending in a first direction for receiving light through one of said apertures;
a second field lens mounted within said distal end having an optical axis extending in a second direction for receiving light through the other of said apertures;
beam combining prism means adjacent said field lenses for directing light therefrom along a single path in a proximal direction;
an eyepiece lens assembly at said proximal end of said barrel for the viewing of images transmitted thereto;
objective and relay lens means along said barrel for producing images and transmitting the same to said eyepiece lens assembly; and
adjustable light transmission control means for selectively blocking the transmission to said eyepiece lens assembly of light received by either one of said first and second field lenses while allowing the transmission to said eyepiece lens assembly of light received by the other of said field lenses.
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Accused Products
Abstract
An endoscope which is provided at its distal end with two fixed field lens assemblies, one facing generally forwardly and the other laterally, the endoscope also being provided with an adjustable control allowing the practioner to switch at will between the illuminated surgical or diagnostic site as viewed by one field lens or the other without removing the endoscope from the patient.
157 Citations
20 Claims
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1. A dual view endoscope comprising an elongated outer tubular barrel having proximal and distal ends and having optical entrance apertures at its distal end;
- a first field lens mounted within said distal end of said barrel having an optical axis extending in a first direction for receiving light through one of said apertures;
a second field lens mounted within said distal end having an optical axis extending in a second direction for receiving light through the other of said apertures;
beam combining prism means adjacent said field lenses for directing light therefrom along a single path in a proximal direction;
an eyepiece lens assembly at said proximal end of said barrel for the viewing of images transmitted thereto;
objective and relay lens means along said barrel for producing images and transmitting the same to said eyepiece lens assembly; and
adjustable light transmission control means for selectively blocking the transmission to said eyepiece lens assembly of light received by either one of said first and second field lenses while allowing the transmission to said eyepiece lens assembly of light received by the other of said field lenses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a first field lens mounted within said distal end of said barrel having an optical axis extending in a first direction for receiving light through one of said apertures;
Specification