Photocoagulator

US4026293A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Erich Blaha · Oberkochen, DE
• Walter Lang · Oberkochen, DE
• Ortwin Mueller · Oberkochen, DE

Key dates

• Filing date: May 16, 1975
• Grant date: May 31, 1977
• Expiry date: May 16, 1995

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F9/008
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A photocoagulator using a gas discharge lamp and a mirror for forming a double image of the luminous plasma region of the lamp in a photocoagulation area adjusted for size by interchangeable field stops is improved for easier adjustability when field stop sizes are changed. A manually operable screw ring moves the lamp axially relative to the mirror to adjust the separation of one image from the other relative to the size of the field stop, and the side of the field stop facing toward the coagulation area is illuminated for brightening the environment of the coagulation area for easier observation.