Rollei Fototechnic Gmbh

Bodo Mielke

An electromotive drive for swiveling the viewfinder mirror in a single-lens mirror reflex camera between its viewfinder position and its picture taking position. A balanced mirror drive includes a drive arm. The drive arm forms an integral component of the electromotive drive. The drive arm can be electromotively swiveled in about a fixed pivot axis lying parallel to the viewfinder-mirror swivel axis. The drive arm is kinematically coupled with the viewfinder mirror in such a way that the swiveling of the drive arm induces a swiveling in the opposite direction of the viewfinder mirror.

Electromotive mirror drive in a mirror reflex camera

An electromagnetic drive for a focal-plane shutter of a camera having two light-excluding shutter curtains, each of the two shutter curtains being having its own electric drive motor, which is a linear motor constructed from permanent magnets and electromagnetic coils. The linear motor has at least two mutually aligned permanent magnets. The opposite pole faces of the magnets have the same polarity. A soft-magnetic disk is disposed between the permanent magnets. A soft-iron casing encloses the magnets and the soft-magnetic disk with an annular gap therebetween. A coil former is displaceably mounted in the annular gap such that it can exert an operating stroke between two stops. The coil former has a drive element for transferring the axial displacement of the coil former to the assigned shutter curtain.

Electromagnetic drive for a focal-plane shutter

A photographic camera (1) includes a back part (8) attachment that houses a charge-coupled surface sensor (9) and an associated filter system (11 and 13-17). The filter system includes a plurality of filters (13-16) positioned on a carrier (11). A motor (20) rotates the carrier (11) about rotational axis (12) such that individual filters (13-16) or cover disk (17) are positioned in front of the charge-coupled surface sensor (9). When the back part (8) attachment is mounted on the camera, the charge-coupled surface sensor (9) and one of the filters (13-16) lie in the beam bath from lens (3). Preferably, the lens (3) is interchangeable. Preferably, the individual filters (13-16) of the filter system are selected to break down incident light into primary colors (e.g., red, green, blue, and yellow). The cover disk (17) protects the charge-coupled surface sensor (9) when the back part (8) attachment is removed from the camera body (1).

Growing community of inventors

Wolfenbuettel, Germany

Bodo Mielke