Method of using a condensing lens

Details Method of using a condensing lens Method of using a condensing lens

1984-02-13

1987-02-17

Arnold, Bruce Y.

350 11, 350438, G02B 522

Patent

active

046435247

ABSTRACT:
A method of using a condensing lens which carries an optical filter in a central portion thereof which includes an optical axis. The filter intercepts ultraviolet rays and infrared rays except for those which are incident on an exposed peripheral portion of the lens. The filtered light is conducted by a light conducting cable to a plant culturing station for photosynthesis. The light receiving end of the cable is usually located at the focal point of visible rays output from the lens and, at the time of harvest, at the focal point of ultraviolet rays.

REFERENCES:
patent: 2520635 (1950-08-01), Grey
patent: 3118063 (1964-01-01), Kaufman
patent: 3481758 (1969-12-01), Upton
patent: 4196967 (1980-04-01), Ohnishi et al.
patent: 4483585 (1984-11-01), Takami

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