Matches 1 - 15 out of 15
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7599129 Compact imaging lens system  
A compact imaging lens system includes, in order from the object side to the image side, a first lens ( 1 ) of negative refractive power, a free-form surface prism ( 2 ) of positive refractive...
6950242 Design and fabrication process for a lens system optically coupled to an image-capture device  
An optical system operable to transmit an energy flux is described. A first substantially spherical lens includes first and second substantially hemispherical portions joined at an interface. The...
6912095 Projection lens system  
A compact and light-weighted projection lens system that is capable of projecting an image at an angle as wide as 75 degrees with sufficient field angle and brightness as represented by F number of...
6844989 Lens system installed in mobile communication terminal  
Disclosed is a lens system installed in a mobile communication terminal, comprising: a first lens including at least one aspherical plane and having a positive refractivity; a perforated iris...
5861987 Stereoscopic-vision endoscope offering a large angle of introversion and a necessary and sufficient sense of three-dimensionality  
A stereoscopic-vision endoscope of the present invention comprises a tubular elongated insertional part, an objective optical system situated in the insertional part, a relay optical system...
5272565 Compact zoom lens system  
The invention provides a compact zoom lens system which has an angular coverage from wide angle to moderate telephoto and makes a relatively bright and parallax-free TTL finder possible and in...
4730909 View direction changing optical system for endoscopes  
A view direction changing optical system provided with a first optical member having a first reflecting surface for bending downward the optical axis along the lengthwise direction of an endoscope...
4684224 Field view direction changing optical system  
A field of view direction changing optical system comprising an incident face intersecting at right angles with the optical axis of the light from the observation field of view forming an angle θ...
4655557 Oblique viewing optical system for endoscopes  
An oblique viewing optical system for endoscopes wherein, in order to make it easy to work and assemble the component parts and to reduce the light amount loss, a visual field direction changing...
4598980 Objective optical system for endoscope  
An objective optical system for an endoscope comprises a retrofocus objective lens assembly consisting of a front-stage diverging lens unit, an aperture diaphragm, a rear-stage converging lens...
4385809 Copying lens  
A copying lens system of three lenses is provided in which the total length is less than 0.15f with aberration fully corrected. This is brought about by a three-lens system in which the first lens...
3720458 SYMMETRICAL LENS  
A family of symmetrical lenses having three components of which the outside two are doublets consisting of an outer biconvex and an inner biconcave lens while the interior lens is biconcave, has...
3663092 ELBOW MAGNIFYING LENS  
A four element magnifier with right angle prism which includes, in the direction from the eye to the object, a three-component lens with two cemented surfaces, two single collecting lens and a...
3453043 IMAGE ROTATING DEVICE  
3350156 Nomographic computer scanning means  
Matches 1 - 15 out of 15