Slit lamp microscope and selectively insertable diaphragm disk

US5321446A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Jurgen Massig · Oberkochen, DE
• Gerhard Gaida · Aalen, DE

Key dates

• Filing date: Feb 23, 1993
• Grant date: Jun 14, 1994
• Expiry date: Feb 23, 2013

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/135
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In a slit lamp microscope, changeover can be selectively made between conventional slit lamp microscopy and confocal perforated disk microscopy. In slit lamp operation, the microscope is constructed as a stereo microscope. The Nipkow perforated disk required for the confocal perforated disk microscopy is arranged in an indirect beam path. Alternatively, the Nipkow disk can be arranged on a pivotable support element and can be pivoted into the beam path in the vicinity of an intermediate image plane. For confocal perforated disk microscopy, an additional illumination device is provided that is reflected into the beam path between the Nipkow disk and the oculars. The insertion of the Nipkow disk or the switching of the beam paths takes place such that the focal plane of the objective is constant. A changeover is made from conventional slit lamp microscopy to confocal perforated disk microscopy without refocusing. A direct comparison of the images observed with the two procedures is therefore possible.