Variable spot size illuminator with constant convergence angle
Patent 4628416 Issued on December 9, 1986. Estimated Expiration Date: 
May 3, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 3, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 06/729983 filed on 05/03/1985US Classes:362/553, Laser606/15, With optical fiber606/16, With optical fiber606/17, With beam shaping or redirecting (e.g., lens)606/4OphthalmicExaminersPrimary: Jones, LarryAttorney, Agent or FirmInternational ClassesA61B 18/20 (20060101)B23K 26/06 (20060101) F21V 8/00 (20060101) F21V 5/00 (20060101) F21K 7/00 (20060101) AbstractA variable spot size illuminator for projecting a variable size spot of light into an illumination plane comprises a source of light, fiberoptic image transmission means having an entrance surface and an exit surface, means for projecting a cone of said light onto said entrance surface, objective lens means for focusing light emerging from said exit surface into said illumination plane, and means for varying the distance between said entrance surface and the vertex of said cone of light. The variable spot size illuminator is useful for projecting a spot of variable size with constant beam convergence in a laser photocoagulator. | |
