Microfilm camera apparatus

US4015903A · kind A · utility

Assignee

• VEB Pentacon Dresden · DE

Inventors

• Hans Zimmet · Dresden, DE
• Manfred Wiessner · Dresden, DE

Key dates

• Filing date: Dec 20, 1974
• Grant date: Apr 5, 1977
• Expiry date: Dec 20, 1994

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B27/58
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A microfilm camera has a carrier plate for holding a film sheet and a slidable carriage for sliding the carrier plate into and out of an operative position. The carrier plate is secured to the slidable carriage either directly or via a guide bush by means of three retaining screws which form the angles of a triangle which includes the geometric center of the carrier plate. Associated with each retaining screw is a support screw by means of which the distance between the carrier plate and the slidable carriage can be adjusted at each of the angles of the triangle. To enable the adjustment to be made by means of an auto-collimator, the carrier plate may be mirror-coated or the surface thereof which is intended to hold the film sheet.