Lamp, Slit, Fiber Optic
Monday, September 11, 2006
A Fiber Optic Projector has been designed and developed with a Slit Lamp illumination system consists of a laser-to-Fiber Optic coupling, a laser light beam Fiber Optic, a fiber-to-slit-lamp coupling, an optical beam-reshaping device and a Slit Lamp microscope.
The laser light beam is emitted from the Fiber Optic and is split by a polyprismatic lens. The light beam is collimated by a lens system and focused onto the cornea by the objective lens of the Slit Lamp microscope.
An eight-facet polyprism is mounted in the slit-lamp slit. The single light beam leaves the Fiber Optic in eight individual beams. The light beams are focused by the slit-lamp objective lens to eight points located on a circular ring concentric with the slit lamp axis. A polyprismatic lens mask provides for selective light beam pattern blocking. It also provides blocking to seven of the eight light beams leaving a single beam focused on a single spot. The Projector can also provide simultaneous projection of the eight points (spots) equally distributed in a ring on the surface of the cornea without any tissue contact.
Source: "Laser refractive surgery: a review and current status," by Qiushi Ren and Richard H. Keates, Optical Engineering, Vol. 35 (3), March 1995
Contact:
Reference:
1) University of California, Department of Ophthalmology, Irvine, CA, 92717
2) Beckman Laser Institute and Medical Clinic, Irvine, California 92717
3) Richard A. Hill and. Michael W. Berns, University of California, Irvine,
Industrial Products
posted by JD52 @ 7:28 PM,
