Attachment for microscopes

US4856872A · kind A · utility

Assignee

• OCULUS OPTIKGERAETE GMBH · DE

Inventors

• M. Spitznas · Bonn, DE
• Wolfgang Veit · Wetzlar, DE
• Rainer Kirchhuebel · Aßlar, DE

Key dates

• Filing date: Mar 12, 1987
• Grant date: Aug 15, 1989
• Expiry date: Mar 12, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B21/22
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An attachment for microscopes, in particular for stereomicroscopes, facilitates a contact-free viewing of an eye freely movable by the patient, in particular the fundus of the eye. Such an attachment must be easily and quickly attachable to the microscope and must deliver an image section of up to 120.degree.. Moreover, the free movability of the eye must be assured and the attachment must also at high temperature be able to be sterilized quickly, without influencing the wearability of the attachment. This is achieved by an attachment having two lenses or lens systems, the distance between the systems being adjustable and the systems replacing the objective lens of the microscope. The housing of the attachment can be connected to the microscope through a screw or bayonetlike coupling. The outer lens of the attachment is arranged easily movably in axial direction relative to the housing, whereby all reciprocally movable and turnable parts of the attachment are provided with a coating, which consists of pressed and sintered PTFE polymers containing Al.sub.2 O.sub.3 particles.