An optical transducer comprises a light source for emitting radiant energy, a base member, and an elongate light collector positioned for receiving radiant energy from the light source. The elongate light collector comprises a tunnel formed in the base member and a collector window that extends along a length of the tunnel. Radiant energy projected by the light source is received in the tunnel through the window and is transmitted along a length of the tunnel. A portion of the transmitted radiant energy exits the tunnel to thereby vary the intensity of light along the tunnel length. At least one photosensor is positioned for detecting the amount of radiant energy at a location in the tunnel. In this manner, the intensity of radiant energy at the tunnel location is indicative of at least relative position between the incident radiant energy and the at least one photosensor.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a Continuation-in-Part of U.S. application Ser. No. 09/332,203 filed on Jun. 12, 1999, now U.S. Pat. No. 6,246,049. This application is also a Continuation-in-Part of U.S. application Ser. No. 09/350,487 filed on Jul. 9, 1999, now U.S. Pat. No. 6,333,512, which claims the benefit of U.S. Provisional Application No. 60/092,968 filed on Jul. 15, 1998. This application also claims the benefit of U.S. Provisional Application No. 60/223,063 filed on Aug. 4, 2000.
System and method for modifying an optical assembly with another image modifying device by using an adapter assembly to connect or couple three image modifying devices together. The adapter assembly includes two adapters that have collars to hold a night vision monocular between them, and to each connect with a camera and lens, respectively, modifying a camera-lens assembly for use in night time photo surveillance. One adapter's collar includes a gripping mechanism to grip one end of the night vision monocular. The other adapter's collar includes one or two channels to each receive a pin on the other end of the night vision monocular and a locking mechanism to secure one pin in its channel. Attachments members on each adapter include mechanical and electrical connectors to couple or connect the adapters to each other, and to electrically connect the camera with the lens.
A seed tube for an agricultural seeding machine includes a side wall having at least a portion thereof formed from a transparent material. A sensor includes a transmitter which is positioned adjacent an outside of the side wall, and operates through the transparent material.
